DEWETRON Data Acquisition Solutions - LHM-instrumentation

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DEWETRON Power Anwendungen

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DEWETRON Power Applications

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Due to shorter product development cycles, the pressure on engineers and technicians to produce accurate and repeatable test data has never been greater. DEWETRON supports them by providing market leading Test and Measurement Instruments and Solutions.

Our system’s characteristics:

Synchronous multi-domain data acquisition

Signal conditioning for any sensor

Market leading software with sensor database support (TEDS and more)

Scalable, flexible and reliable hardware

Worldwide support and service

Connectivity to and many third party products including data analysis software

DEWETRON’s unique product architecture put data from many sources in one RECORDING and in SYNC. Having automatically all data synchronized, makes data analysis and processing faster and easier than ever. This brings a whole new level of understanding and comparing test data and results.

Specialized know-how and many years of experi-ence make DEWETRON the reliable partner for demanding test and measurement applications.

Whatever your measurement application is -

WE HAVE THE SOLUTION!

DEWETRON -

Working with DEWETRON

Shortest time to high quality test and measurement data

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Why DEWETRON? SYNCHRONOUS MULTI-DOMAIN DATA ACQUISITION

Consider testing a car or airplane. You will want to connect some sensors of your own, such as accel-erometers, thermocouples, RPM, etc. In addition you will connect to the CAN BUS or in airplanes, to ARINC 429BUS and monitor one or a hundred parameters. And you might as well use a GPS sensor to get position, a more precise speed, distance, direction, etc. Finally, why not hook up a camera so that you can record what the driver/pilot saw, or to watch a wheel turning?So immediately we have ANALOG sensor data + COMMUNICATION BUS digital data + GPS serial data + VIDEO frames... all of these data types exist in dif-ferent domains, and they come into our system at their own rates, i.e., asynchronously. Our systems can easily sample asynchronous multi-domain data input simulta-neously (one clock for all channels) from these sources AND MORE!We offer all of these interfaces, and more for most of our systems. More interfaces are being added all the time.

SCALABILITY AND MODULARITY

Our different signal conditioning amplifiers cover a wide range of input types for any sensor. The ability to scale from a few channels to many and to split in several housings without compromising the simultaneous data sampling of all channels is unique. Consider large scale testing facility e.g. a train with hundreds of dynamic sensors and perhaps thou-sands of static measurements. You can have several Measurement Instruments and use each separately or have them networked from different locations and com-bined to one multi channel measurement solution. Rugged designs (MIL-STD and EN STD) allow our sys-tems to go just about anywhere, and get the job done from rack-mounting up to mobile.

CONFIGURE, CONTROL, MEASURE, PROCESS, ANALYZE AND STORE

DEWESoft - our award-winning software is standard on all Measurement Instruments and Solutions. DEWESoft provides the interface to all DEWETRON hardware, the interfaces, signal conditioners, A/D cards ... and allows you an unprecedented level of control over the data sampling (with multiple modes) and visualization (screen lay out). The online (during measurement) data processing with mathematical formulas simplifies and accelerates data analysis. Multiple export filters allow post-analysis and documentation with your existing tools. Programming interfaces are available to extend DEWETRON systems to your specific needs.For each measurement, sensor parameters together with the test parameters can be stored in the data file. This enables easiest and complete post-processing of measured data and allows seamless repetition and traceability of tests.

QUALITY FIRST

Our commitment to Total Quality is based on the under-standing of what is important for the success of our customers. It starts with the definition of the technical specification, covers the development, production, quality control, shipment, and ends with support and service of our systems during the operation. Our sys-tems cover a wide range of meeting specifications and norms (EMI, CE, etc) and each of our components and systems come with calibration certificates.DEWETRON is ISO 9001:2000 and ISO 14001:2004 cer-tified with rigorous quality procedures and documenta-tion of every aspect of our business.

SUPPORT AND SERVICE

DEWETRON and partners are close to you in more than 25 countries around the world. We offer one stop shopping to define the optimal test and measurement system for your need and application. After shipment we can provide training on-site or at our locations. Over the long life cycle of our systems, support and service close to you exist in multiple languages. Different cali-bration services for our components and systems are available.

LEADING TECHNOLOGY

State-of-the-art technology is used in every aspect of our systems to achieve market leading precision and accuracy.Our high precision signal conditioning amplifiers with galvanic isolation cover a wide range of input types for any sensor and offer high Common-Mode Rejection Ratio. The AD conversion with different resolution and sampling rates offer time synchronized data capture of all analog channels, digital I/O, counters, encoders and CAN-Bus signals. Our mechanical designs provide excellent shock and vibration specifications.

Put it all together to create a DEWETRON system – time synchronized, multi-domain, flexible, reliable and easy to use Test and Measurement Instruments and Solutions.

DEWETRON -

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Power Measurement (on page 7)

Power Network Analyzers (on page 29)

Power Fault Recording (on page 49)

Key Functions

Monitoring of power supply systems

Power plant testing and monitoring

High-, medium- and low voltage systems

GPS synchronisation, Remote control

Fault recording, Power flow

Harmonics, Flicker

IEC 61000 conform

DIP measurements

Database storing

EN50160, ITIC (CBEMA)

UNIPEDE

Key Functions

EN50160

IEC61000-4-30 Class A

Power rating

Harmonics, including 2-9 kHz

Interharmonics

Flicker

Symmetrical components

Frequency

DISDIP/Unipede statistics

CBEMA/ITIC curve

Applications

Wideband power analysis

Engine test benches

Transformer tests

RPM (rotation per minute) and torque measurement

Determination of efficiency factor

Harmonics analysis

Record of dynamic processes

Streaming up to 1 Msamples/s

Examination of rotating field

Hybrid cars and alternative drive systems

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Measuring on Electrical Machines page 19

Measurements on Transformers page 22

Measurements for Hybrid Vehicles

and other Alternative Drive Concepts page 24

Measuring on 400 Hz (800 Hz) Machines page 27

Power Quality Analyses –

Power Quality Measurements page 41

Energy Consumption Measurements -

Load Curve Analyses page 44

Measuring Wind Power Plants page 46

Power Fault Records and Power Monitoring in

Energy Transmission Grids page 61

Monitoring Power Supply of Electrical Railway Systems page 64

Harmonic Monitoring of High-Voltage Power Lines page 66

Application Examples for Power Measurement

Application Examples for Power Network Analyzers

Application Examples for Power Fault Recording

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Power MeasurementDEWE-PM

In times of power electronics power measurement is not only a multiplication of current and voltage but primarily an analysis of interfering high-frequency and broadband signals. Sinusoidal qualities, as once electric current and voltage, are displaced by pulse packages; power ratings do not have only 50 or 60 Hz any longer.

Beside the calculation of power for the fundamental oscillation and all signals, questions of harmonics, sym-metries, flickers and start-up processes arise.

Switching frequencies of drive mechanisms having several kHz require sampling rates of several hundred kHz and analogical bandwidths of input amplifiers. The demand of preciseness is far below 0.1 % and this should preferably be the case in the entire frequency spectrum and amplification range.

Applications

Wideband power analysis

Engine test benches

Transformer tests

RPM (rotation per minute) and torque measurement

Determination of efficiency factor

Harmonics analysis

Record of dynamic processes

Streaming up to 1 Msamples/s

Examination of rotating field

Hybrid cars and alternative drive systems

Online Informationwww.dewetron.com/power

A u t o m o t i v eE n e r g y & P o w e r A n a l y s i s

A e r o s p a c eTr a n s p o r t a t i o n

G e n e r a l Te s t & M e a s u r e m e n t

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U-moduleDAQP-HV

I-moduleDAQP-LV

A/D1 Msamples/s

POWERmoduleDEWESoft

n, M

CAN

VIDEO

CPU

DEWE-xxx-PM

Math.functions

M 3~

3~

f

Grid

P, Q, S, ...

FFT


High-speed recording (Streamer)Long term recording (Logger)

n, M, ω, η

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ENERGY & POWER • Power Measurement

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DEWETRON Power Measurement

Have you ever thought about the complex mechanism of statements like P=U*I*cosPhi? Have you ever thought about the meaning of the current being a sinus? Do you even know the velocity of voltage? Does it even have a velocity (= frequency)?

Or is it wiser to say that voltage has many velocities (frequencies)? Isn’t it more adequate to say that current does not only have one sinus but a number of sinusoidal oscillations (harmonics)? Isn’t it also adequate to say that power is the sum of all products of current, voltage and phase angle?

And this brings us right to the discussion: What is happening to all these products? Parts with the same frequency can reach effects (active power) or only help to build up a magnetic field (reactive power). Some are necessary for the powering of electrical motors (fundamental oscillations) and some products result from the multiplication of components with different frequencies (distortion power).

Additionally, the question arises how high-frequent the analysis of the components of the electrical system has to be. If we talk about pulse-wide modulated drives, we have sampling rates in the range of above 10 and 100 kHz.

Questions over questions ….

But fortunately you do not have to worry about how to measure these things. We have already done that for you and products of DEWE-xxx-PM series do not only have power measurement but also modules for harmonics analysis, symmetrical components and flickers. Long-term recordings as well as quick sampling rates for the examination of e.g. start-up procedures are possible.

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DEWESoft POWER Measurement Software The option POWER for the DEWESoft (DEWESoft-OPT-POWER) is an absolutely high-performance tool for the calcu-lation of power and other similar parameter – the capacity to multiply current and voltage is not the only feature it has. This toolbox is an excellent combination of many features and nearly all applications can be realised by using DEWETRON equipment.

Beside the exact calibration the frequency calculation is a central feature of this software. 50 Hz and 60 Hz are a must – for us also 16.7, 400 and 800 Hz as well as DC and variable frequencies (driver) are a necessity. Due to the high acquisition rate (mainly dependent on the AD card in use, up to 1 MS/s) and the DAQP-HV-S3 module there is no limitation of the acquisition of PWM drivers (700 kHz electrical bandwidth) and the calculation of active and reac-tive power, power factor etc … The toolbox with power quality parameters such as harmonics, interharmonics, THD, symmetric components, flicker and its combination with numerous trigger possibilities make the equipment a power analyser with nearly no limitations. Several screen elements such as vectorscopes, harmonics monitor, oscilloscope and diagrams allow a perfect online visualisation of the data.

The integration of counter inputs, video and CAN-Bus offers additional data sources. The mathematical library addi-tionally offers the possibility to calculate parameters such as torque and angular velocity, or even determine the efficiencies online.

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Power Calculation P, Q, S, D

Cos Phi, power factor

P, Q, cos Phi for each harmonic

Symmetrical components (positive, negative and zero sequence components)

Period values (½ cycle, cycle, overlapping ...)

Frequency CalculationThe software PLL guarantees a very accurate frequency calculation (mHz). On one system multiple power systems can be measured and each can have its own frequency. With the use of the different instruments from DEWESoft the values can be shown in several ways.

Calibration/AccuracyThe high accuracy of the calculation can be reached because of the calibration function in the frequency domain. With this unique technology amplitude and phase can be corrected for the full frequency range from DC up to whatever the hardware can sample (kilosamples up to megasamples per second). All internal curves like filter response or multiplexer shift are corrected inside the software and the sensor database includes correction curves for each clamp, rogowski coil, transformer or which sensor ever is used.

Scope Selectable graphs

U1, U2, U3, U12, U23, U31: Line to line and line to earth voltages are supported

Up to 8 graphs in one diagram

Zoom in and out are supported online

Waveforms can be stored

Vector Scope Vector scope for 3 phase systems

Each individual harmonic can be shown

More vector scopes can be displayed on one screen

Different power systems can be shown on one screen

With the “transparent” function direct comparisons of phasors are possible

Recorder Recording of all parameters in individual intervals

Individual screens can be defined

Zoom in and out

Storing fast (full sampling rate) or reduced (e.g. 600 sec.)

Detailed zoom-in to pulse width!

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X/Y Recorder Orbitals can be generated online

P over Q as example for this function

FFT - Harmonics Analysis U, I, P and Q

Individual setup of the number of harmonics including DC-component (Example: 20 kHz sampling rate = 200 harmonics @ 50 Hz)

Interharmonics, groups or single values

According to IEC 61000-4-7

Calculation corrected to the actual real frequency

THD, THD even, THD odd

Trigger on each parameter

Background harmonics substractable

Optionally definable group-mode for harmonics and interharmonics. Selectable number of pins and frequency groups - “200 Hz“ according to IEC 61000-4-7 (OPT-DB required)

Full FFT - Frequency Analysis In addition to the harmonics FFT a full frequency based FFT is available.

All frequencies can be analyzed with this function

Trigger on FFT patterns

Definable filters (hanning, haming, flat top, rectangle, …)

Flicker According to IEC 61000-4-15

PST and PLT with flexible intervals

Individual recalculation intervals

Fault Recorder Setting a trigger on all parameters of the power module!

U, I, P, Q, S, D, cos Phi, power factor, ...

Each harmonic!

Pos-, neg-, zero-sequence systems

Very fast glitch detection (up to MS/s)

Math. channels (rpm, torque, efficiency,…)

Edge-, filtered edge- and window-trigger Setting the trigger on rising edge when the threshold has been crossed

Setting the trigger on falling edge when the threshold has been crossed

Setting the trigger when signal enters the range between two definable threshold levels

Setting the trigger when signal leaves the range between two definable threshold levels

Further trigger functions: pulse width, window and pulse width, slope, FFT and time


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Additional FeaturesVideoThe parallel usage of the synchronic DEWESoft VIDEO function allows the user to store videos in parallel with the data recording and opens a wide range of applications – whenever optical information is needed!

Other Additional Input ChannelsOther DEWETRON DAQP modules are available with which – depending on the kind of sensor - other parameters such as temperature, sound and vibration can be measured in parallel ways. More detailed information can be found in the DEWE-DAQ manual or be obtained from your DEWETRON dealer.

Math FunctionsWith the additional MATH Function of DEWESoft calculations of for example efficiency, difference of input, output and phase angle differences can be implemented easily. Use all POWER parameters as input value!

Arithmetic functions

Trigonometric functions

Logic functions

Signal generator

Event functions

d/dt, integration

Highpass-, lowpass- and bandpass-filters

Transfer curve functions

GPS and NETWith the use of the GPS function a comparison of different units on different locations is possible. Phasor measurement and angle comparisons are a typical application of this function.

Rotational and Torsional Vibration MeasurementTorsional vibration is an oscillation of angular motion (twist) which occurs on rotating parts - such as gear trains, crankshafts or clutches. High tor-sional forces and vibrations result in material fatigue, abnormal abrasion etc. and can be destructive in the long run. In many cases, torsional vibra-tion is not noticed until the affected part is damaged. Often only vibration noise is the only indication of torsional vibration.

Remote ControlWith the remote control ability the instrument can be configured and the data can be evaluated from your office or wherever you are.

Report Generator and Database Storing (DEWESOFT-OPT-DB)

In several applications, especially when it is necessary to evaluate data over long periods, with different samp-ling rates or in parallel to their acquisition, it might be necessary to use a really strong database tool. Therefore DEWETRON has developed the DATABASE OPTION as an add-on to DEWESoft.

Beside data storing there is also a strong reporting tool available. Diagrams, FFT spectra, Fault reportings and sta-tistic functions are the basic functions and additional reports can be added by using the plug in Technology. Nice visual elements can be used to get a good overview about the full measurement system.

Reports like EN50160 or IEC 61000-2-4 can be easily generated as well as large customized reports on the user‘s needs.

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System Overview

DEWE-820-PM DEWE2600-PM DEWE-5000-PMAnalog inputsChannels 8/16 8/16 8/16Voltage 4/8 DAQP-HV-S3 4/8 DAQP-HV-S3 4/8 DAQP-HV-S3Current / low voltage input 4/8 DAQP-LV 4/8 DAQP-LV 4/8 DAQP-LVCurrent / Shunt 0,1 Ohm / 5 A 0,1 Ohm / 5 A 0,1 Ohm / 5 ACurrent / Transducers 200, 400, 700, 1000 A 200, 400, 700, 1000 A 200, 400, 700, 1000 ACurrent / Clamps 1000 ADC / 1400 AAC 1000 ADC / 1400 AAC 1000 ADC / 1400 AAC

Additional inputsDigital 8 8 8Counter 2 (opt. 10) 2 (opt. 10) 2 (opt. 10)CAN-bus opt. 2 opt. 2 opt. 2InterfaceRS232 2 2 2Ethernet 2 2 2USB 4 4 4Display VGA external VGA external VGA externalRecordingResolution 16 bit 16 bit 16 bitSample rate selectable max. 500 K samples/sec

opt. 1 Msamples/secselectable max. 500 K samples/sec

opt. 1 Msamples/secselectable max. 500 K samples/sec

opt. 1 Msamples/secPower supplyAC 110/230 V 50/60 Hz 110/230 V 50/60 Hz 110/230 V 50/60 HzDC 110/220 VDC 110/220 VDC (opt. DC/Battery) 110/220 VDC

DisplayVGA external internal 15" TFT, 1024 x 768 internal 15" TFT, 1024 x 768EMV ESD IEC 61000-4-2 IEC 61000-4-2 IEC 61000-4-2

8 kV contact; 15 kV air 8 kV contact; 15 kV air 8 kV contact; 15 kV airEMV EN 55011 EN 55011 EN 55011

Class A Class A Class APower supplySurge IEC 61000-4-5 4 kV IEC 61000-4-5 4 kV IEC 61000-4-5 4 kV Burst IEC 61000-4-4 4 kV; L, N, PE IEC 61000-4-4 4 kV; L, N, PE IEC 61000-4-4 4 kV; L, N, PEVoltage inputsSurge IEC 61000-4-5: 4 kV IEC 61000-4-5: 4 kV IEC 61000-4-5: 4 kVBurst IEC 61000-4-4: 4 kV IEC 61000-4-4: 4 kV IEC 61000-4-4: 4 kVCurrent inputsSurge IEC 61000-2-5: 2 kV IEC 61000-2-5: 2 kV IEC 61000-2-5: 2 kVBurst IEC 61000-2-4: 2 kV IEC 61000-2-4: 2 kV IEC 61000-2-4: 2 kV

Shock and vibrationShock und vibration Desktop or rack-installation Mobile applications Mobile applications

EnvironmentalTemperature (T.op) 0 to +50 °C 0 to +50 °C (0 to +45 with batteries) 0 to +50 °CTemperature (T.store) -30 to +70 °C -20 to +60 °C -20 to +70 °CHumidity 10 to 95 %, non condensing 10 to 80 %, non condensing 10 to 80 %, non condensingHousing 19" Rack, 4UDimensions (W x D x H) 437 x 443 x 177 mm (17.2 x 17.4 x 7 in.) 409 x 245 x 291 mm (16.1 x 9.6 x 11.5 in.) 460 x 351 x 200 mm (18.1 x 13.8 x 7.9 in.)Weight typ. 10 kg (approx. 22 lb.) typ. 14 kg (approx. 31 lb.) typ. 17 kg (approx. 37 lb.)Please ask for additional current transducers!

Order numbers sampling rate ksamples/sec

I/O card Voltage channelsDAQP-HVS3-B Modules

Current channelsDAQP-LV-B Modules

Digital I/Os Counter

Dewe-820-PM-500-8 500 DEWE-Orion-1616-500 4 4 8 2Dewe-820-PM-500-16 500 DEWE-Orion-1616-500 8 8 8 2Dewe-820-PM-1000-8 1000 DEWE-Orion-0816-1000 4 4 8 2Dewe-820-PM-1000-16 1000 2 pcs.DEWE-Orion-0816-1000 8 8 16 4Dewe-2600-PM-500-8 500 DEWE-Orion-1616-500 4 4 8 2Dewe-2600-PM-500-16 500 DEWE-Orion-1616-500 8 8 8 2Dewe-2600-PM-1000-8 1000 DEWE-Orion-0816-1000 4 4 8 2Dewe-2600-PM-1000-16 1000 2 pcs.DEWE-Orion-0816-1000 8 8 16 4Dewe-5000-PM-500-8 500 DEWE-Orion-1616-500 4 4 8 2Dewe-5000-PM-500-16 500 DEWE-Orion-1616-500 8 8 8 2Dewe-5000-PM-1000-8 1000 DEWE-Orion-0816-1000 4 4 8 2Dewe-5000-PM-1000-16 1000 2 pcs. DEWE-Orion-0816-1000 8 8 16 4

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DAQP Modules Voltage input up to ±1400 V

Input type Current inputInput ranges Unipolar/

Bipolar:DC accuracy 20 V to 50 V ±0.05 % of reading ±40 mV Bipolar 10 mV to 50 mV ±0.02 % of reading ±40 μV

50 V to 1400 ±0.05 % of reading ±0.05 % of range 100 mV to 50 V

Unipolar 10 mV to 50 mV ±0.04 % of reading ±40 μV100 mV to 50 V

AC accuracy: Filter (lowpass) Filter characteristics

Frequency additional AC error Frequency additional AC errorf/f0 % of reading f/f0 % of reading<0.1 0 <0.1 00.1 0.005 0.1 0.0050.2 0.07 0.2 0.070.3 0.36 0.3 0.360.5 2.1 0.5 2.10.75 10 0.75 10

1 20 1 20Frequency-accuracy ±1 mHz ±1 mHzAngle-errors Frequency Error Frequency Error

f/f0 ° f/f0 °<0.1 0.01 <0.1 0.010.1 0.25 0.1 0.250.2 0.75 0.2 0.750.3 0.8 0.3 0.80.5 1 0.5 10.75 1 0.75 1

1 1 1 1Input coupling -

Gain linearity 0.03 % 0.02 %Gain drift range Typical 20 ppm/°K (max. 50 ppm/°K) Typical 20 ppm/°K (max. 40 ppm/°K)Offsetdrift Uni- and bipolar

20 V to 100 V 10 mV to 200 mV 15 μV/°K500 mV to 50 V 50 ppm of the range/°K

200 V to 1400 V Typical 5 ppm/°K

Long term stability 100 ppm/sqrt (1000 hours) 100 ppm/sqrt (1000 hours)Input resistance 10 MOhm 1 MOhmBandwidth -3 dB ±1.5 dB @ f0: 700 kHz -3 dB: 300 khzFilter selection Push button or software Push button or softwareTypical SNR 100 kHz 10 kHz 100 kHz 10 kHz

50 V 80 dB 90 dB 20 mV 71 dB 81 dB200 V 90 dB 97 dB 1 V 80 dB 98 dB1400 V 93 dB 99 dB 50 V 80 dB 98 dB

Typical CMRR > 80 dB @ 50 Hz 10 mV to 1 V 2.5 V to 50 V70 dB @ 400 Hz >100 dB @ 50 Hz 90 dB @ 50 Hz60 dB @ 1 kHz >100 dB @ 1 kHz 65 dB @ 1 kHz48 dB @ 10 kHz 83 dB @ 10 kHz 55 dB @ 10 kHz

Isolation 1.4 kVRMS phase conductor to ground 350 VDC (1 kVRMS with banana jacks)1.8 kVRMS phase to phase

Protection CAT III 600 V 350 VDC

CAT IV 300 V±4000 V Pulse (1.2/50 µS)±4000 V Burst (5 kHz)

Output voltage ±5 V ±5 VOutput resistance <10 Ohm <10 OhmOutput current 5 mA 5 mAOutput protection Short circuit to GND up to 10 seconds Short circuit to GND up to 10 secondsPower supply ±9 VDC ± 1% ±9 VDC ± 1%Power consumption 0.7 W 0.7 WOperating temperature 0 to 60 °C 0 to 60 °CRS-485 Interface Yes Yes

DAQP-HV-S3 DAQP-LV

(1) only with Bessel filter characteristic

±20 V, ±50 V, ±100 V, ±200 V, ±400 V, ±800 V, ±1400 VVoltage input

DC or AC, software selectable (1.5 Hz standard, down to 0.01 Hz on request)

Typical 0.5 mV/°K max. 4 mV/°K

max. 20 ppm of range / °K

10 mV, 20 mV, 50 mV, 100 mV, 200 mV, 500 mV, 1 V, 2.5 V, 5 V, 10 V, 25 V, 50 V

±0.02 % of reading ±0.05 % of range

±0.04 % of reading ±0.05 % of range

Bessel or Butterworth 40 dB/decadeBessel or Butterworth 40 dB/decade10, 30, 100, 300, 1k, 3k, 10k, 30k, 100k, 700 kHz(1) 10, 30, 100, 300, 1k, 3k, 10k, 30k, 100k, 300 kHz(1)

Current measurement with voltage input up to ±50 V

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High Precision Current Transducers

Three to six channels

Models from 200 Apk to 1000 Apk

High linearity Low offset

High bandwidth Low phase error

SpecificationsModel PM-MCTC 60 PM-MCTS 200 PM-MCTS 400 PM-MCTS 700 PM-MCTS 1000Transducer PM-867-60I PM-867-200I PM-867-400I PM-867-700I PM-867-1000IHF

DC, Peak 60 A 200 A 400 A 700 A 1000 ARMS Sinus 40 A 140 A 280 A 500 A 700 AOverload AbilityNormal Operation 110 % (220 Apk) 110 % (220 Apk) 110 % (440 Apk) 110 % (770 Apk) 110 % (1100 Apk)Short Time (100 mS) 500 % (1000 Apk) 500 % (1000 Apk) 500 % (2000 Apk) 500 % (3500 Apk) 500 % (5000 Apk)Bandwidth DC … 1 MHz DC … 1 MHz DC … 500 kHz DC … 250 kHz DC … 1 MHzTemperature Influence 1 ppm/K 1 ppm/K 1 ppm/K 1 ppm/K 1 ppm/KOutput Ratio 200 mApk

bei 60 Apk

200 mApk

bei 200 Apk

200m Apk

bei 400 Apk

400 mApk

bei 700 Apk

1 Apk

bei 1000 Apk

Linearity 0.001 % 0.001 % 0.001 % 0.001 % 0.001 %Offset 0.004 % 0.004 % 0.004 % 0.004 % 0.004 %Frequency Influence 0.03 %/kHz 0.03 %/kHz 0.06 %/kHz 0.12 %/kHz 0.03 %/kHzAngular Influence 0.01° + 0.045°/kHz 0.01° + 0.045°/kHz 0.01° + 0.06°/kHz 0.01° + 0.12°/kHz 0.01° + 0.045°/kHzShunt PM-MCTS-BR5 PM-MCTS-BR5 PM-MCTS-BR5 PM-MCTS-BR5 PM-MCTS-BR1

Primary Current Range

Model overview 60 A - 1000 A

Optional Shunts PM-MCTS-BR1 PM-MCTS-BR2.5 PM-MCTS-BR5

1 A / 1 Ω / 1 W Shunt 800 mA / 2,5 Ω / 1 W 400 mA / 5 Ω / 1 Wfor MCTS 1000 Shunt for MCTS 700 Shunt for MCTS 200/400

Amplitude Accuracy 0.1 % 0.05 % 0.05 %Angular Accuracy 1° at 100 kHz 1° at 100 kHz 1° at 100 kHzFrequency Range 300 kHz / 0.5 dB 300 kHz / 0.5 dB 300 kHz / 0.5 dB

Power supply PM-MCTS-xxx

Nominal Current Range Basic Three Channel System

Additional Current Channel

Optional Shunt

60 A (Transducer PM-867-60I) PM-MCTS-60 PM-CM-60 PM-MCTS-BR5200 A (Transducer PM-867-200I) PM-MCTS-200 PM-CM-200 PM-MCTS-BR5400 A (Transducer PM-867-400I) PM-MCTS-400 PM-CM-400 PM-MCTS-BR5700 A (Transducer PM-867-700I) PM-MCTS-700 PM-CM-700 PM-MCTS-BR51000 A (Transducer PM-867-1000IHF) PM-MCTS-1000 PM-CM-1000 PM-MCTS-BR1

- MCTS Rack - 1 internal Power Supply - 1 Plug-On Shunt- 3 internal Power Supplies - 1 Transducer Head- 3 Transducer Heads - 1 Connection Cable- 3 Connection Cables 10 m- Power Cord

100.000

10.000

1.000

0.100

0.010

0.0015000005000050005005050

Amplitude-/ phase-error depending on frequency

Frequency (Hz)

Amplitude-error

Phase-error

10.000

1.000

0.100

0.010

0.001100806040200

Amplitude-error depending on range (DC)

Range (%)

Amplitude-error (%)

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Shunts DAQ-SHUNT-3 DAQ-SHUNT-4 DAQ-SHUNT-5Application Power grid analysis Power grid analysis Power grid analysisType of current AC + DC AC + DC AC + DCImpedance 0.1 Ohm 0.1 Ohm 0.1 OhmAccuracy 0.1% 0.1% 0.1%Temperature drift <±10ppm/K (20°C to 60°C) <±10ppm/K (20°C to 60°C) <±10ppm/K (20°C to 60°C)

ConnectorsInput: built in banana jacksOutput: 30 cm cablewith banana plugs

DC current clamp with selectable range (PNA-CLAMP-150-DC)Application Converter analysisDC input range 0,2 to 100 A 0,5 to 1000 AAC input range 0,4 to 150 A 0,5 to 1400 AOutput 10 mV/A 1 mV/A% accuracy 0,5 to 20 A 1,5% ±5 mV 0,5 to 100 A 1,5% ±1 mV

20 to 100 A 1,50% 100 to 800 A 2,50%100 to 150 A 2,50% 800 to 1000 A 4%

1000 to 1400 A DC4%Phase shift (45 to 65 Hz) 10 to 20 A <3° 10 to 200 A <2°

20 to 100 A <2° 200 to 1000 A <1,5°Temperature drift <±300ppm/K (-10°C to 55°C)

Flexible current loop with selectable range(PNA-A100-300-45)Application Power grid analysis, AC applicationsAC input range 0,5 to 300 A 0,5 to 3000 AOutput 10 mV/A 1 mV/A% accuracy 5 to 300 A <= 1% 5 to 3000 A <= 1 %Phase shift (45 to 65 Hz) 0,5 to 300 A <= 0,7° 0,5 to 300 A <= 0,7°Temperature drift < ±50 ppm/K (-10 °C to 55 °C)

Input: built in banana jacksOutput: built in banana jacks

Input: 2 m cable with banana plugsOutput: 30 cm cablewith banana plugs

selectable

selectable

ULTRASTAB SATURN Current Output Voltage Output PM-SATURN-2000IHF PM-SATURN-5000I-140 PM-SATURN-2000U PM-SATURN-5000U-140

Primary Nominal current (Ipn) Programmable in steps of

2000 A 125 A

5000 A 250 A

2000 A 125 A

5000 A 250 A

Polarity Nom. output range ± 1.0 A ± 2.0 A Max. output load 1.5 Ω 0.75ΩOverload capacity (normal operation) 15% 15% 15% 15%Overload capacity (Fault) 500 % (0.1s) 1000 % (0.1s) 500 % (0.1s) 1000 % (0.1s) Absolute calibration (23ºC amb.) < 50 ppm < 50 ppm Linearity error < 2 ppm < 3 ppm < 4 ppm < 5 ppm Gain accuracy < 4 ppm < 6 ppm Measuring/ratio stability Vs. Temp. Vs. time

< 1 ppm/ºC < 1 ppm/month

< 1 ppm/ºC < 1 ppm/month

≤ 2 ppm/ºC < 2 ppm/month

≤ 2 ppm/ºC < 2 ppm/month

Offset Initial Drift vs. Temperature Drift vs. time

< 2 ppm(adj.) < 0.5 ppm/ºC < 1 ppm/month




Output noise (RMS) DC - 10 Hz DC - 10 KHz DC - 50KHz

< 0.1ppm < 2 ppm < 4 ppm

< 0.1ppm < 2 ppm < 4 ppm

< 0.1ppm < 2 ppm < 4 ppm

< 0.1ppm < 2 ppm < 4 ppm

Noise feedback to main conductor DC – 100KHz (RMS) < 10 µV < 10 µV < 10 µV < 10 µV Dynamic response correctly followed to 0.1% > 20 A / µS > 20 A / µS > 20 A / µS > 20 A / µS Delay time < 1 uS < 1 uS < 1 uS < 1 uS Bandwidth (3 dB, small signal 0.5%)

0 – 300 KHz (<5% of Ip)

0 – 50 KHz (<5% of Ip)

0 – 300 KHz (<5% of Ip)

0 – 50 KHz (<5% of Ip)

Test voltages Operating temp. Electronics Measuring heads Supply voltages Supply current/power 50 VA 100 VA 50 VA 100 VA Busbar free zone to be within linearity spec. Cylinder shape (diameter x length) ø 220 x 220 mm T.B.D ø 220 x 220 mm T.B.D Cable length Standard Optional

2.5 m 30 m

2.5 m 30 m

2.5 m 30 m

2.5 m 30 m

Electronics dimension and weight Transducer heads dimension and weight 165 x 200 x 50 mm

With ø50 hole 3.5kg 350 x 350 x 92 mmWith ø150 hole 17kg

165 x 200 x 50 mm With ø50 hole 3.5Kg

350 x 350 x 92 mm With ø150 hole 17kg

5 KV ACRMS

10 - 40 ºC 0 - 55 ºC

100 / 115 / 230 VAC, +/-10% - 50/60 Hz

Rack mount 483 x 89 x 371 mm - 5 kg

Bipolar

5 KV ACRMS

10 -40 ºC 0 - 55 ºC

100 / 115 / 230 VAC, +/-10% -50/60 Hz

Rack mount -483 x 89 x 371 mm - 5 kg

Bipolar ±10V 5mA

2000 A - 5000 A

Shunts + Current Clamps

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Calculated Measurement Accuracy

Example - How to calculate the accuracy:

Range U: 200 V / 300 kHz

Range I: 40 A (Transducer PM-MCTS-200 with shunt PM-MCTS/BR5) / 300 kHz

Data: U=100V / I=20A / f=50 Hz / Phi=30°

Results:

Voltage %15.00100200%05.0%05.0 =++=++= VACVDCrangeVDCfixV FFFF

Current

%672.02040%05.0%

10005003.0%05.0%0

2040%05.0%02.0 =+++++=

+++++= IshuntIMCTSfreqIMCTSfixIACIDCrangeIDCfixI FFFFFFF

Angle

°=°+°+°+°+°=

++++=

033.01000

5011000

50045.001.001.001.0

PhiShuntqPhiMCTSfrePhiMCTSfixPhiIPhiVPhi FFFFFF

Power %823.0%100*)1()1([ =−±±=S

SFIFUMaxF IVS

Active Power %856.0%100*)]cos()1()1([ =−±±=

PPFFIFUMaxF PhiIV

Pmϕ

Reactive Power %922.0%100*)]sin()1()1([ =−±±=

QQFFIFUMaxF PhiIV

Qmϕ

Frequency Angle U I Failure P real Failure P theory Failure Q real Failure Q theory50 0 100 10 0.02 1.37 n.a. n.a.50 30 100 10 0.02 1.41 0.01 1.4750 60 100 10 0.03 1.47 0.02 1.4150 90 100 10 n.a. n.a. 0.02 1.371000 0 10 5 0.02 1.40 n.a. n.a.1000 30 10 5 0.01 1.49 0.08 1.661000 60 10 5 0.06 1.66 0.03 1.495000 60 10 1 0.30 2.46 0.38 1.83

Typical measured values:

More Info:http://power.dewetron.com/accuracy/homepage.aspx

DEWETRON Ges.m.b.H. • Parkring 4 • A-8074 Graz-GrambachTel (+43) 316 3070 0 • Fax (+43) 316 3070 90 • [email protected]


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Measuring on Electrical Machines

Introduction Hardly a motion that is not carried out by an electrical drive, hardly no drive motor with any kind of electrical machine, hardly an electric motor that is not operated by a frequency converter. Efficient technologies are required, best efficiency factors are demanded and highly accurate measurements are therefore

necessary. Such drives cause an increased adoption of power electronics and all implications connected with that such as circuit feedback, broadband frequency spectra of current and voltage, pulse-frequency modulated signals and fast slew rates of the voltage impulses.

Task Modern frequency converters use various algorithms in order to simulate voltage and currents. They all have in common that electric switches (IGBTs) are used that have steep rising edges (3 kV/µs) and high pulse frequencies (up to 40 kHz). Broadband measurements with high dynamics for voltage and currents are, in this case, necessary to fulfill the following tasks:

Exact identification of active power

Identification of reactive power, also in case of high phase angles

Identification of power loss

Efficiency factor (also mechanical parameters)

Especially for the identification of efficiency factors several power measurements are required at the same time: 3~ grid, 3~ motor, 1~ intermediate circuit, rotation speed and torsional moment are not uncommon. Measuring these parameters synchronously and accurately is the big challenge.

SolutionDEWETRON‘s solutions for this application are DEWE-XX-PM-instruments with the DEWE-ORION cards 1616-500 or 0816-1000 and DAQP-HV-S3 modules for measuring voltage and DAQP-LV modules for measuring current.

Motor

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Beside the standard functions of power measurement instruments, several additional measurements are required to be able to carry out a complete analysis of the motors:

± 1400 Vpeak

4 kV electric strength

700 kHz bandwidth

1 MS/s sampling rate

Typical accuracy of < 0,05 %

Individual number of channels

Several power modules in one instrument

Every power module can have its individual frequency (software PLL)

DC, 16,7 Hz, 50 Hz, 60 Hz, 400 Hz, 800 Hz, variable frequencies

Synchronous analysis of harmonics and frequency

Mathematical library (e.g. calculation of various efficiency factors)

Video recording in parallel

System perturbation for frequency converters according to EN61000-3-2

Power curve and characteristic curve of revolutions per minute (rpm) and torsional moment

Electrical characteristics such as harmonics, fundamental power, reactive power, switching operation, run-up

DC-measurements in the frequency converter

Analysis as regards grid, motor, intermediate circuit and – mechanically – the drive shaft (Welle)

Voltages up to 1000 VRMS directly measurable (DAQP-HV module)

Analyses of run-up with data storage and processing

Mechanical parameters such as rotation speed and vibration of the motor and the shaft respectively

Acoustic emission (sound power level, frequency spectrum)

Hardware Only one DEWETRON measurement instrument is needed to carry out all these measurements. Based on the new DEWE-XX-PM-series it is quite easy to define the appropriate hardware solution for you. With up to 16 input channels several power modules can be used in order to e.g. synchronously measure parameters regarding grid, motor and intermediate circuit. Additionally, revolutions per minute, torsional moment, temperature and acoustic level measurement can be carried out. The enormous range of DEWETRON modules and sensors makes synchronous measurement and evaluation of parameters possible. Great importance was attached to the development of these instruments as regards interference resistance. The frequency converter thus benefits from the strong common-mode rejection voltage. Another contribution to the interference resistance is the high electric strength.

DEWESoft Power Measurement Software The potion power for the DEWESoft is a very high-capacity tool for the calculation of power and other similar parameters. Due to the calibration in the frequency range a high accuracy of the calculated values is reached. With the help of this unique technology amplitudes and phase can be corrected in the frequency domain. All internal correction curves were incorporated in the software and the sensor data base includes all correction curves for current and voltage converter or whatever sensor is used. Beside the precise calibration the frequency calculation is a central feature of the software. 50 and 60 Hz are a must – for us also DC and variable frequencies are, of course, a must. Due to the high sampling rate (up to 1MS/s) and the modules there is no limitation to the recording of pulse-width modulated signals (up to 700 kHz electrical bandwidth) and the calculation of active, reactive and total power, power factor, etc.

Some Details

Many Power ModulesWith the DEWESoft power module an arbitrary number of power modules can be measured at the same time. Motors e.g. Ugrid/UDC/Umotor

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FFT– Harmonics Analysis U, ULine, I, P, cos and Q

Individual setup of number of harmonics including DC (example: sampling rate 20 kHz = max. 200 harmonics @ 50 Hz)

Values adjusted to the actually measured frequency of fundamental oscillation

Frequency analysis up to 500 kHz

Remote Control With the help of the remote control the instruments can be configured from afar – for example while being in the office.

Plug-in OPCThe OPC-plug-in for DEWESoft provides the integration of the measurement instrument in the scada system and thus the implementation of automated test benches. OPC is a standardized protocol for the transmission of data from several measurement instruments (OPC server) to one central computer (OPC client).

Acoustics/Acoustic Level MeasurementAccurate and high-resolution acoustic level measurements according to IEC 60651, 60804, 61672. With its user-friendly interface DEWESoft brings the sophisticated acoustic level measurement/acoustic analysis to the user.

Customers Producers of motors

Producers of frequency converters

Users of drive systems

Plant engineering

Testing institutes

Universities and research centers

Further Information Product flyer DEWE-XXX-PM

DEWETRON components catalogue


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Measuring on Transformers

Introduction The general opinion that low-loss transformers are not a current topic in times of current regulation and thus reasonable energy costs has to be qualified. Low-loss transformers also contribute to the achievement of the kyoto-objectives as regards the reduction of greenhouse gas emission. The power measurement of transformers, especially the identification of power loss, must be very precise indeed. Precise measurement at a phase angle of 90°, that is mere reactive power, is one of the most important premises.

Task When we talk about transformers we think of the precise identification of losses, short-circuits and idling losses. This means that we need a high accuracy for U, I and P at 50/60 Hz and in small power factors.

Solution

Hardware Based on the new DEWE-XX-PM-series it is quite easy to define the adequate hardware solution. With up to 16 input channels several power modules can be used in order to e.g. measure 3-phase input and output lines at the same time.

With the help of the high number of channels (basic instrument with 16 channels, upgrade rack with another 16 channels) also multi-coil transformers can be identified during one measurement cycle. Additionally, temperature and acoustic/noise level can be measured.





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Software/Calibration The option power for DEWESoft is a high-performance tool for the calculation of power and other related parameters. The accuracy of the calculated values is achieved by the calibration in the frequency range and the special calibration of the angle error. Using this unique technology, amplitude and phasing in the frequency range can be corrected. All internal correction curves are considered by this software and the sensor data base includes all corrections for current-, voltage converter or any sensor used. A correction of power measurement is also possible according to IEC 60076-1.

Some Details

Various Power ModulesWith the DEWESoft power module an arbitrary number of power lines can be measured simultaneously. e.g. transformer: Uprim / Usek / Ueb / U


Individual setup of the number of harmonics including DC (example: sampling rate 20 kHz = max. 200 harmonics @ 50 Hz)

Values adjusted to the actual power frequency

Vector DiagramThe „transparency function“ makes the direct optical comparison of phases possible (e.g. input and output of a transformer). Moreover, the values can be calculated analytically with the help of mathematical functions.

Plugin-OPCWith the OPC-Plugin for DEWESoft the integration in the control technology can be carried out and automated test benches can be put into practice. OPC is a standardized protocol for data transfer from several measurement instruments (OPC server) to one central computer (OPC client).

Acoustic/Noise Level Measurement Accurate and high-resolution noise level measurements following IEC 60651, 60804, 61672.

DEWESoft and its user-friendly interface convince and bring the sophisticated noise-/acoustic analysis to the customer.

Customers All producers of transformers (ranging from power

transformers to distribution transformers)

Companies responsible for maintenance and energy supply companies

Energy supply companies




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Measurements for Hybrid Vehicles and other Alternative Drive Concepts




IntroductionDue to the worldwide energy situation alternative energy concepts for vehicles of all kinds are getting more and more important. Hybrid vehicles are already serialized and more and more electric drive concepts appear on the market. The electric motors with electronically controlled feed, that is also able to recuperate braking energy, are the future. Batteries and fuel cells are used more and more.

Task Modern drive systems work with very fast converters that have both high pulse frequencies and steep rising edges. The power measurement is thus confronted with all tasks of modern power measurement instruments: broadband input modules, high sampling rates, highly accurate identification of reactive and active power, determination of rotation speed and torque. Beside the measurements of motors (3~, permanently energized synchronization instruments), also measurements of battery circuits and intermediate circuits are of interest – and this absolutely synchronous (DC, single-phase).

Further interesting parameters could be temperature, oscillation, acoustics, sound emission, torsion and rotation oscillation and analysis of combustion engines provided that they are used in parallel. On the one side, such systems should be as portable as maximally possible for mobile applications. On the other side, it should be possible to integrate them in engine test benches. This requires adequate data interfaces.

Solution

HardwareBroadband measuring inputs, high sampling rates and robust design combined with high flexibility – this unifies DEWETRON in its instruments of DEWE-xxx-PM series; be it the 820 as engine test bench solution or the 2600 that is battery-powered. They all have the modular construction in common that allows an arbitrary number of current and voltage input channels. Temperature, charge or bridge amplifiers can also be used as can CAN bus adapters or counter interface for e.g. tachometers.


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For highly accurate current measurements zero flux transducer are used that not only feature high dynamics (startup current versus idle current with an accuracy of 0.05%) but also high band-width. As for voltage inputs also in this case several 100 kHz are a must (-3dB@700kHz). Sampling rates of up to 1 MHz allow exact analysis of pulse packages of the frequency converters.

Software The software DEWESoft with its option POWER was especially developed for the electric power measurement. It includes the conventional and approved DEWESoft functions and moreover provides all parameters that are necessary for electric drives:

P, Q, S, PF

U, I, cos Phi

Harmonics

FFT up to 500 kHz

M, n

X/Y recorder

Sound

Vibration

Rotational and torsional vibration

Special Functions

Several Power Modules at same Time With the DEWESoft power module several power systems can be measured at the same time. Motors:e.g. UMotor 3~/UDC/UBattery

Sound and Vibration

Exact and high-resolution noise level measurement according to IEC 60651, 60804, 61672. With its user-friendly operator interface DEWESoft brings the sophisticated noise/acoustics analsyis to the user.

Rotational and Torsional Vibrations With this module you can easily measure rotational vibrations, bearing damages, unbalances, etc. and can record - in parallel to the power data discussed so far - as well as evaluate them.

Power Analyses on Combustion Engines CA-OptionShould, as it is the case with classical hybrid vehicles, combustion engines also be in use beside electrical drive systems, then these engines can simultaneously be analyzed with the DEWESoft-CA.

COMBUSTIONENGINE

GEARBOX

BATTERY

ELECTRICALMOTOR

ELECTRICALGENERATOR

POWERMANAGEMENT

Torsional vibration

Combustion analysis

Power analysis

Rotational vibration

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Drive Ability Tests DEWESoft offers a wide range of functions for drive ability tests that can, of course, be used simultaneously. GPS systems for deceleration measurements, in parallel to the recuperation of drive systems, are only one of several possibilities provided.

CAN-BusBeside a number of sensors, also direct CAN bus systems can be provided. CAN bus data can here be used by the DEWESoft as all other measurement channels.

VideoThe use of synchronous DEWESoft VIDEO functions allows the parallel storing of video data and measurement values and opens a wide range of application possibilities – whenever optical information is needed.

Remote ControlWith the remote control system the instruments can be configured and the data can be evaluated from afar – for example while being in your office. The transmission of data from vehicle to vehicle via WLAN is also a special feature.

Open Interface (DCOM) The programming interface DCOM offers every user the possibility to arrange his individual integration into test bench systems. Several protocols already generated are available (OPC, Modbus, …) – just contact us and we are pleased to find your individual solution for your applications.

Customers Vehicle producers

R & D departments for electrical drive systems

Research centers and testing laboratories


Product flyer DEWE-5000-hybrid



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Introduction Beside the typical grid frequencies of 50 Hz and 60 Hz, 400 Hz and 800 Hz are applied increasingly. The reason for that is the low installation size of generators and motors respectively with the same power. We mainly talk about isolated networks as they are used in on-board power supplies on ships, airplanes or in military applications.

Task Harmonics, voltage fluctuations and transients are a current topic within these fast grids as well as within their slower siblings. However, the difference lies in the necessary bandwidth or sampling rate of the measurement instruments. If you want to analyse 50 harmonics you need a sampling rate of 40 kHz in 400 Hz grids and a sampling rate of even 80 kHz per channel in 800 Hz grids. Transients should even be recorded with 500 kHz or more.

Harmonics measurement

Power measurement

Determination of power factor

Voltage fluctuation

Transients

Efficiency factor

The identification of efficiency factors, especially at low workload and big phase angles, gives information on the overall efficiency. Especially nowadays when energy optimisation is in the focus of interest this is an absolutely important tool.

SolutionDEWETRON‘s solutions for this application are DEWE-XX-PM-instruments with the DEWE-ORION cards 1616-500 or 0816-1000 and DAQP-HV-S3 modules for measuring voltage and DAQP-LV modules for measuring current.

± 1400 Vpeak

4 kV electric strength

700 kHz bandwidth

1 MS/s sampling rate

Typical accuracy of < 0,05 %

Individual number of channels

Several power modules in one instrument

Synchronous analysis of harmonics and frequency

Mathematical library (e.g. calculation of various efficiency factors)

Electromagnetic influences

Power curve and revolutions per minute / torque curve

Electrical characteristics such as harmonics, fundamental power, reactive power, switching operation, run-up

Measuring on 400 Hz (800 Hz) Machines





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Hardware DEWETRON offers several instruments that are suitable for measurements on 400 Hz (800 Hz) machines. The basis is always a basic instrument with a rack for DAQP module. Special focus was put on the stability and capacity of the instruments independently from the fact that a 19’’ instrument for a fixed installation or a portable instrument is used.

SoftwareThe identification of transients, the calculation of power and the measurement of harmonics are only a few of the numerous functions of the measurement software DEWESoft with its option POWER. Unbalances, flicker, frequency and revolution per minute are some more that are nowadays necessary for the power analysis. Besides, it is very important to reach high sampling rates that can be processed by the software: 500 kHz for the calculation of power are a must-have for controlled drive systems.

Some Details

Many Power ModulesWith the DEWESoft power module an arbitrary number of power modules can be measured at the same time. Motors e.g. Ugrid / UDC / Umotor


Individual setup of number of harmonics including DC (Example: sampling rate 80 kHz = max. 50 harmonics @ 800 Hz)

Values adjusted to the actually measured frequency of fundamental oscillation

Frequency analysis up to 500 kHz

Customers Producers of electrical engines

Producers of frequency converters

Aircraft industry/on-board power supply

Shipbuilding/on-board power supply

Military service/on-board power supply

Test institutes




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Power Network Analyzers DEWE-PNA

The DEWE-xxx-PNA systems are energy net analyzers which can persecute power quality analysis following exact standards and a lot more beyond that. The combina-tion of high-capacity measurement software and flexible report generators enables the user to solve nearly every task in the field of energy measurement.

Another advantage is the configuration of the instru-ments. On the one side, we have the type DEWE-570 developed for the technician on site - stable, isolated and easy to operate. On the other side, there is the DEWE-module-based instrument such as the DEWE-2600-PNA. Its perfect flexibility of the hardware also allows complex applications in the fields of engineering and develop-ment.

Exact measurements according to IEC-61000-4-30 Class A, the power quality measurement standard, are also an absolute necessity and characteristics of our instruments.

Key Functions

EN50160

IEC61000-4-30 Class A

Power rating

Harmonics, including 2-9 kHz

Interharmonics

Flicker


Frequency

DISDIP/Unipede statistics

CBEMA/ITIC curve

Online Informationwww.dewetron.info/power




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POWERModuleDEWESoftLoad

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DEWE-xxx-PNA

PMTReport Generator

Supply 3~, N, PE

Fault analysis(page 8)

Harmonics analysis (page 6)

Further analysisand reports(page 10)

Analysis according to standards(page 9)

Power analysis(page 7)

Star, Delta, V, Aron, Single Phase ...

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The DEWETRON Power Quality Analyzers

Due to the changing market power quality analyzes are getting more and more important. On the one side, the increasing use of electronic consumers causes system perturbations. On the other side, the num-ber of blackouts has grown recently. Early detection of shortages is therefore necessary and trend analyzes of various parameters can be helpful. Additionally, the obligation to prove the quality of the power supply system has changed and commercial aspects are also getting more and more important.

Simple recordings of voltage are source for the interpretation of power supply. In order to be able to be more precise and find solutions, it is not sufficient to calculate the voltage by means of average values of 10 minutes. Transient recorders with acquisi-tion rates of Mega Hz even detect fastest disturbance peaks and are essential for the exact analysis.

The topic harmonics also becomes a new important aspect. If you have done the analysis of up to the 25th or even 50th harmonics, you can now go far beyond that. The frequency spectrum of 2-9 Hz has been redefined and in the future it will be analyzed in 200 Hz bands. The combination of this new standard and the formerly used harmon-ics standards is the main task of up-to-date power quality analyzers. DEWETRON has acted on this subject by creating the very latest generation of software and covering the whole spectrum of harmonics, interharmonics, frequency bands and grouping methods. Standard measurements with pre-defined and standardised setups are included or individual settings can be done by the users themselves.

The standard software package includes flicker, unbalance, calculation of power and frequency etc. as well as a report generator with which one can print pre-defined reports (e.g. EN50160) on the one side and create individual reports on the other side.

The consumption of energy as well as the energy costs are rising. The reduction of energy costs is hence one major topic of interest. Treaties and prices are relevant – the effective consumption as well. In order to be able to reduce the consumption, one has to know the exact energy consumption and the internal power flow.

In order to be able to measure this, multi-channel measurement instruments are nec-essary. Using these instruments one can measure the consumption on several lines at the same time. This can also be done in parallel ways in different distribution boxes or even buildings.

With the help of the report generator one can create simple reports on power flow and distribution of energy consumption. The export interfaces support a quick exchange of data with other analysis software packages.

Disturbance Analysis

EN50160 and other Norms

Harmonics Analysis

Flicker and More

Energy Analysis

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DEWE-571-PNA

DEWE-571-PNA-1MSUsage portable portable portable portable portable fix installedSampling rate per channel Standard Option up to 1 MS/s - up to 1 MS/s -Voltage supply Battery powered 1) Battery powered 1) 90 to 260 VAC Battery powered 1) 90 to 260 VAC 85 to 265 VAC

Dimensions (W x D x H) 360 x 300 x 150 mm 360 x 300 x 150 mm 380 x 295 x 155 mm 409 x 240 x 291 mm 460 x 351 x 200 mm 160 x 115 x 166 mm(14.2 x 11.8 x 5.9 in.) (14.2 x 11.8 x 5.9 in.) (15 x 11.6 x 6.1 in.) (16.1 x 9.4 x 11.5 in.) (18.1 x 13.8 x 7.9 in.) (6.3 x 4.6 x 6.5 in.)

Weight typ. 6 kg (13 lb.) typ. 6.4 kg (12.8 lb.) typ. 8.5 kg (19 lb.) typ. 15.5 kg (34 lb.) typ. 17 kg (37 lb.) typ. 1.5 kg (3.3 lb.)

Input specificationsVoltageVoltage channels 3Voltage range 400 VBandwidth 20 kHzRequired DAQ module internalCurrentCurrent channels 4 12 -Clamps -Direct current input yesFlexible coils -Current range Direct input 5 A 5 A - - - 5 A Clamps depending on clamps depending on clamps depending on clamps depending on clamps depending on clamps depending on clamps Flexible coils 3000 A 3000 A 3000 A 3000 A 3000 A 3000 ARequired DAQ module - - -Additional channelsAdditional channels with expansion rack EPAD opt.

FunctionsMultiple 3 phase systems yesVoltage, current voltagePower, frequency frequencyHarmonics, Interharmonics, THD harmonicsFlicker yesSymmetrical components yesPeriod values, disturbance rec. yesFast transient recorder yesReport generator yesNetwork Monitoring yesEN50160 yesWide band power analysis DEWE-570-PNA-1MS - -

EMCPower supply 4 kV (surge and burst) 4 kV (surge and burst) 2 kV (surge and burst) 4 kV (surge and burst) 2 kV (surge and burst) 2 kV (surge and burst)Voltage input 4 kV (surge and burst)Direct current input -1) External AC power supply (100 to 240 VAC) included, external DC power supply (9 to 36 VDC) optional

with PMT reporting tool (DEWESOFT-OPT-DB)with DEWE-ORION series boards

4 kV (surge and burst)

yesyesyesyesyesyes

DAQP-HVMDAQ-PQL-SUB-HV

4± 1400 V peakDC to 300 kHz

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DEWE-571-PNA-4U12I DEWE-3020-PNA DEWE-2600-PNA DEWE-5000-PNA DEWE-838-PNA

20 kS/s

yesyes -

yes

DAQP-LV

16 slow 8 fast + EPAD

yesyesyesyes

4 kV (surge and burst) n.a.

Module Input type Ranges Accuracy Bandwidth (BW),Filters (LP = lowpass)

Isolation (ISO),Overvoltage protection (OP)

DAQP-LV-B, -SC Low voltage 10 mV, 20 mV, 50 mV, 100 mV, 0.05 % range BW: 300 kHz OP: 350 VDC

200 mV, 500 mV, 1 V, 2.5 V, + 0.05 value LP: 10, 30, 100, 300 Hz, ISO: 350 VDC, 1 kVRMS with banana plugs5 V, 10 V, 25 V, 50 V 1, 3, 10, 30, 100, 300 kHz

DAQP-HV-B, -SC High voltage ±20, ±50, ±100 V 0.1 % BW: 300 kHz ISO: 1.8 kVRMS

±200, ±400, ±800, ±1400 V LP: 10, 30, 100, 300 Hz,1, 3, 10, 30, 100, 300 kHz

DAQP-LA-SC Direct current input 0.1 % BW: 300 kHz ISO: 1 kVRMS

(0.1 Ohm internal shunt) LP: 10, 30, 100, 300 Hz,1, 3, 10, 30, 100, 300 kHz

30 A peak; 10 A peak; 3 A; 1 A; 0.3 A; 0.1 A

DAQ Amplifiers

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The DEWESoft Power Measurement Software The option POWER for the DEWESoft (DEWESoft-OPT-POWER) is an absolutely high-performance tool for the calcu-lation of power and other similar parameters – the capacity to multiply current and voltage is not the only feature it has. This toolbox is an excellent combination of many features and nearly all applications can be realised by using DEWETRON equipment.

Beside the exact calibration the frequency calculation is a central feature of this software. 50 Hz and 60 Hz are a must – for us also 16 2/3, 400 and 800 Hz as well as DC software and variable frequencies (driver) are a necessity. Due to the high acquisition rate (mainly dependent on the AD card in use, up to 1 MS/s) and the DAQP-HV module there is no limitation of the acquisition of PWM drivers (300 kHz electrical band width) and the calculation of active and reactive power, power factor etc … The toolbox with the power quality parameters such as harmonics, interhar-monics, THD, symmetric components, flicker and its combination with the numerous trigger possibilities make the equipment a power analyzer with nearly no limitations. Several screen elements such as vector scopes, harmonics monitor, oscilloscope and diagrams allow a perfect online visualisation of the data.

The integration of counter inputs, video and CAN-Bus offers additional data sources. The mathematical library additionally offers the possibility to calculate parameters such as torque and angular velocity or even determine the efficiencies online.

Wiring SchematicsVarious wiring schematics allow the following connections of instruments: single-phase connection, star-connection, delta-connection, V-connection, Aron-connection, two-phase-connection and a combined star-/delta-connection – of course all with or without electric current.

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Harmonics Analysis

Measure

FFT – Harmonics Analysis U, I, P and Q





THD, THD even, THD odd, k-Factor, TIHD


Background harmonics

Grouping methods for harmonics and interharmonics free configur-able: for examle the number of pins and the frequency groups „200 Hz“ according to IEC 61000-4-7

Full FFT In addition to the harmonics FFT a full frequency based FFT is

available.



Selectable Filters (Hanning, Haming, Flat Top, Rectangle, ...)

Analyze

FFT – Spectra Individual number of harmonics (25, 50, …)

Voltage, current, active power, reactive power, phase angle, impedance

Limits according standards (EN50160, IEC61000-2-4, individual definition)

Max / Avg / 95% calculation and comparison against limits

Timestamp or intervals of data presentation

More subgraphs per page possible

More datalines in one graph

Direct comparison of different locations

Zoom In / Zoom Out Function

Report Printing function

3D graph


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Power Analysis

Measure








Zoom in and out


Detailed zoom-in to pulse width!


N over M as example for this function

Analyze

Diagrams Single diagrams or multiple diagrams on one page

Individual number of channels per diagram

Graphical view or statistical view in a table

Table individual configurable

Min / Max / Avg calculation

Up to 5 percentage calculations (eg 95% value) per channel


Direct comparison of different days

Zoom in / zoom out function

Report printing function

Math channels

Histograms Histogram calculation

Med / Stddev / Var / Mod calculation

Individual definition of sidebands


Energy line

Energy consumption diagram

Energy duration line

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Fault Analysis

MeasureFault recorder

Trigger on all parameters of the power module!


Each harmonic!


Very fast glitch detection (MS/s)

Edge-, filtered edge- and window-trigger Trigger on rising edge when the threshold has been crossed

Trigger on falling edge when the threshold has been crossed

Trigger when signal enters the range between two definable threshold levels

Trigger when signal leaves the range between two definable threshold levels


AnalyzeFault Lists

Listings of faults

Filters like time, channel, type etc..

Automatic update function

Confirmation support


Fault Diagrams Waveform presentation of faults

RMS shape calculation

Different setups for different faults


FFT

Math channels

DIS DIP Statistics Statistics like DISDIP / Unipede etc..

Individual limits

Individual time settings

Graphical or table element


Alarm Lists

Alarm list definition





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Analysis according to Standards

Measure

Setups according to certain standards

prepared or user-definable

PQ according to EN501610

Harmonics according to IEC 61000-4-7

Flicker according to IEC 61000-4-15

Measurement according to IEC 61000-4-30 class A




Analyze

EN-50160

IEC 61000-2-4 class 1, 2, 3

Harmonics freely adjustable (for example: IEC 61000-3-x)

Built in report generator for flexible reports

Combination of certain diagrams in one report

Tables

FFT spectra

Fault statistics

CBEMA curve

All other visualization-elements are supported

Summary report for more instruments

Automated report generation and print support

CBEMA/ITIC curve Statistics like CBEMA, SEMI F47 etc..

Individual limits


Combination with DISDIP possible

Graphical view


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Further AnalysisScope

Selectable graphs











Calibration/AccuracyThe high accuracy of the calculation can be reached because of the calibration function in the frequency domain. With this unique technology amplitude and phase can be corrected for the full frequency range from DC up to whatever the hardware can sample (kilosamples up to megasamples per second). All internal curves like filter response or multiplexer shift are corrected inside the software and the sensor database includes correction curves for each clamp, Rogowski coil, transformer or which sensor ever is used.


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Other FunctionsVideoThe parallel usage of the synchronous DEWESoft VIDEO function allows the user to store videos in parallel with the data recording and opens a wide range of applications – whenever optical information is needed!


Math FunctionsWith the additional MATH function of DEWESoft calculations of for example efficiency, difference of input, output and phase angle differences can be implemented easily. Use all POWER parameters as input value!



Logic function

Signal generator

Event functions

d/dt, integration


Transfer curve function


Reporting function Direct report printout

Data export for enhanced post analysis in other applications

PMT as reporting and analysis tool

Notification(for permanent installed systems)

E-Mail

SNMP

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Accessories - Current Clamps for DEWE-570-PNA series

Accessories- Shunts and Current Clamps for DEWE-xxx-PNA series

Models Input range AccuracyPNA-CLAMP-5 5 A ≤ 1 % AC current clamp (small design)

Voltage output

PNA-CLAMP-10 10 A ≤ 1 % AC current clamp (small design)Voltage output

PNA-CLAMP-20 20 / 200 A ≤ 1 % AC current clamp (small design)Voltage output

PNA-CLAMP-1000 1000 A ≤ 1 % AC current clampCurrent output

PNA-FLEX-300-45 300 / 3000 A ≤ 1 % Flexible current transformer(45 cm length)

PNA-FLEX-300-80 300 / 3000 A ≤ 1 % Flexible current transformer(80 cm length)

Description

Models Input range AccuracyPNA-CLAMP-20-B 20 / 200 A ≤ 1 % AC current clamp (small design)

Voltage output

PNA-A100-200-45 200 / 2000 A ≤ 1 % Flexible current loop(45 cm length)





Description

Models Input range AccuracyDAQ-SHUNT-3 5 A ±0.1 %

< 10 ppm

DAQ-SHUNT-4 5 A ±0.1 %< 10 ppm

DAQ-SHUNT-5 5 A ±0.1 %< 10 ppm

100 mOhm ShuntboxCurrent input via 2x safety banana jacksVoltage output via 2x safety banana jacks

Voltage output via 2x 0.3 meter cable with banana plugs

100 mOhm ShuntboxCurrent input via 2x safety banana jacksVoltage output via 2x 0.3 meter cable with banana plugs

100 mOhm ShuntboxCurrent input via 2x 2 meter cable with banana plugs

Description


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Power Quality Analyses – Power Quality Measurements

IntroductionPower quality, also known as keywords like grid quality, grid voltage quality and service reliability, is a topic that is directly linked to energy supply and is certainly a highly topical issue in this field.

Due to the liberalization of power markets, grid-bound energy sources, such as electrical current, became freely tradable products and thus have to obey product liability law as do other tradable products. The corresponding parameters were constituted in the product standard EN 50160 in Europe.

Urms

Wave form

Frequency

3~ phases; symmetry

Availability

Additionally, there are many other tasks: e.g. special harmonics evaluations, long-term measurements, and the identification of fastest transient processes or only power flow measurements in 4 quadrants.

Task The identification of limit values that are constituted in the EN 50160 or in another power quality standard is nowadays not a big challenger anymore. Several millimeters can measure these, compare their values with limit values and reflect them in well-formatted reports.

The task becomes more specialized when you want to find the reasons for off-limit conditions; that is when you want to make exact analyses of the national grid.

For very fast transient processes as they can appear in low voltage grids, sampling rates of 6,4 kHz are not sufficient. 1 million data points per second are necessary in this case.

1 Msamples/sec

The analysis of harmonics up to the 25th is sufficient for the EN 50160 but other standards demand 50 or even 100. Latest standards even proceed to the range of 9 kHz in order to identify disturbances of electrical instruments (200 Hz bands of 2 to 9 kHz).




Application Example for Power Network Analysis

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Harmonics up to 50 / 100 or higher

2 to 9 kHz @ 200 Hz

Flexible grouping method for interharmonics and harmonics

Determination of power flow direction of the individual power harmonics

Flicker as the impact of voltage fluctuation is widely known. But what about the sources of flicker (identification of flicker emission)? What about adjustment of filters (faster re-calculation periods and sliding flicker windows)?

Flicker 10 min Pst, Plt

Identification of flicker emission (current flicker)

Shorter re-calculation periods, sliding flicker windows

Beside the EN 50160, there exist many other standards and regulations in this field. Only some may be listed that imply exact measurement and can be analyzed with DEWETRON-instruments:

EN 50160

IEC 61000-3-x; IEC 61000-2-2; IEC 61000-2-4; …

IEC 62040

ITI / CBEMA curve

DISDIP statistics (Unipede)

TOR D2 (D A CH CZ regulation)

etc.

For medium-voltage power grids analyses are not only necessary for line voltage/earth potential but also for line/line voltage. Short circuits display differently compared to earth faults. Flicker and harmonics should be evaluated for the line/line voltage, the voltage transformers are mostly installed between line and earth. Flexible connection possibilities and internal conversions may remedy.

3 ~ star (e.g. low voltage)

3 ~ star with conversion to delta (e.g. mean and high voltage)

Delta connection (e.g. industrial grids)

Aron- und V-connection

2 ~ (e.g. traction supply systems)

1 ~ (e.g. household)

Conventional instruments for power quality analysis obviously prove to be at the end of their possibilities. With a concept for measurement instruments that is as flexible as possible and that complies with official standards we try to provide the perfect solution.

Solution

Hardware The product DEWE-571-PNA was especially designed and developed for measurements in distributors and central control rooms. Completely isolated, highest EMC protection and a stable case characterize this instrument. If more channels are needed then the ELOG model can help. 4 voltages and 12 currents at the same time are its specific feature.

Besides, also other products in a conventional DEWETRON box and completely installed systems are available. The requirements of analysis instruments for power quality were constituted in the standard IEC 61000-4-30. Our instruments comply with this standard.

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Software The software of DEWESoft with its options POWER and DB (report generator PMT) was especially designed for exact normative analyses and, among other features, offers the following functions for analysis:

Voltage curve, voltage jumps, voltage fluctuations

Disturbance statistics (Unipede, CBEMA, ITI, SEMI F47, …)

Flicker (IEC 61000-4-15)

Power quality analysis, load curve analysis

Reports according to standards (e.g. EN 50160, IEC 61000,…)

Flexibility of configuration of measurement

Flexible screen settings

Flexible reports (according to standards or user-defined)

Integration in permanent monitoring systems possible (please, also see DEWE-XXX-PFR)

Customers Energy supply companies

Grid operators

Service technicians

Energy consultants and engineering offices

Facility management

Constructors of electrical plants

Research institutions in schools and universities

Further Information Product flyer DEWE-XXX-PNA



ENERGY & POWER • Power Quality Analyses & Power Quality Measurements

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Energy Consumption Measurements - Load Curve Analyses

Introduction Energy consumption, its chronological course, the proportion of active and reactive power and the subsequent costs are a big issue nowadays. Of great interest are on the one side, savings capacity both for the consumption and the electricity bill and on the other side, the greenhouse gas emissions in combination with the energy consumption. Furthermore, the load curve is interesting as regards the reduction of peak power and load management systems.

Task Load curve analyses are typically carried out in the main distributors in business enterprises and industrial plants. Transformer stations and the circuits behind them can also be added as typical measurement locations. Of great interest are currents, voltages, active and reactive power – not only the instantaneous value but also as regards their chronological sequence with adjustable averaging interval. Such an analysis usually takes 1 week to 1 month.

In order to be able to configure load management systems efficiently, it is not only obligatory to know the total load curve but also the individual branches. Multi-phase measurements on several consumers, in parallel and if possible with only one instrument is therefore the challenge for measurement technology.

In transformer stations it is important to identify the distribution of energy on the different circuits in order to optimally adjust the operation and identify shortages.

Solution

Hardware The product DEWE-571-PNA was especially designed and developed for measurements in distributors and central control rooms. Completely isolated, highest EMC protection and a stable case characterize this instrument.

If more channels are needed then the ELOG model can help. 4 voltages and 12 currents at the same time are its specific feature. Besides, also other products in a conventional DEWETRON box and completely installed systems are available.





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SoftwareOur software DEWESoft with its POWER option is the perfect tool for these requirements. Power measurement calculations, several 3~ systems at the same time - even with different frequencies, multi-allocation of voltage, sensor scaling etc. are the necessary features.

PMT as a supplement for report generation is the icing on the cake. Load curves, energy growth curves, sorted out load curve analysis (load curve management), statistic functions and the report generator are the functions offered.

A special energy calculation tool (plug-in) moreover offers the possibility to distinguish between consumed and transmitted energy, inductive and capacitive reactive energy, entire energy, and self-configurable energy channels.

Further Functions

PQ ParameterBeside the energy data, all power quality parameters such as harmonics, flicker, unbalances, frequencies and disturbances can be measured.

Mathematics Library You can program arbitrary formula in an online system. The calculation of total power and identification of losses can thus also be done online.

Customers Service technician

Facility management

Constructors of electrical systems

Constructors of load management systems

Research institutions in schools and universities

Energy consultants and engineering offices




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Measuring Wind Power Plants

Introduction Wind power has become one of the most important alternative energy sources of the future. Wind power plants are mostly operated in wind parks or as single plants. Each of these wind power plants acts as an independent power plant and must have special features concerning stabilised voltage and electromagnetic influences respectively. These electrical characteristics have to be verified and carried out as individual tests or sample testing.

Task Wind power plants are thus independent power plants within the grid which they can positively or negatively influence as much as any other supplier or consumer. These influencing parameters (voltage fluctuation, harmonics, frequency, etc.) underlie certain limit values. They have to be especially evaluated according to certain basic requirements such as wind speed and short-circuit power (IEC 61400-21). If the limit values are kept, then all parties of the energy supply system (customer, supplier, plant operator) can expect to have the maximal operation reliability.

Up to 2003, it was required that wind power plants should immediately be disconnected from the grid in case of any disturbances. Today, the amount of energy generated by wind power plants is so high in some regions that plant operators themselves would not be able to switch off wind power plants in case of grid disturbances. Therefore, wind power plants must support the voltage in case of a voltage drop triggered off by e.g. an error in the pre-located power grid, in order to avoid an area-wide switch-off. In open air test sites the entire wind power plant can be tested with the DEWE-xxx-PNA/PFR as regards its capacity to detect a disturbance and support the voltage.

Solution Beside the standard functions of fault recorders and power quality monitors several additional measurements are necessary in order to perform a complete analysis of a wind energy plant:

Fault recorders and transient recorders

Power quality monitor and voltage recorders

Power curve and automatic controller action

Electrical features such as harmonics, flicker, reactive power, switching frequencies, identification of voltage drops

Frequencies up to 700 kHz

DC-measurements in the frequency converter

Analysis on the side of the net and the generator





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Voltages up to 1400 Vpeak directly measurable (DAQP-HV module)

Long-term analysis with data base storage system and evaluation according to norms of wind energy plants and grids with automated reporting system (IEC 61400-21)

Measuring wind power (wind speed, wind direction, altitude profile, turbulences, etc.)

Mechanical parameters such as rotation and oscillation of the rotor

Forces and impacts (rotors, blades, turbine towers, power train, etc.)

Acoustic emission (sound power level, frequency spectrum)

Hardware Only one DEWETRON measurement instrument is necessary to perform all these measurements. Based on the new DEWE-XX-PM/PFT-series it is quite easy to define the appropriate hardware solution for you. Several power modules (three-phase systems) with up to 16 input channels supplied by the basic instrument (and 16 extra channels as an upgrade) can be used in order to, e.g., measure the low and mean voltage at the same time. Additionally, wind speed, temperature and

acoustic/noise level can be measured as well. Great emphasis was placed on stability and interference resistance when developing this instrument. The frequency converter benefits the strong common-mode rejection voltage.

Software In addition to the common power quality functions (flicker, harmonics, voltage fluctuation, imbalance), the evaluation of wind power plants requires some special measurement methods. Beside the flicker emission values (current flicker) these are primarily the evaluation of power and harmonics at different wind speed. Especially when evaluating the frequency not only the harmonics and interharmonics are required but also the 200 Hz groups between 2 and 9 kHz. A comprehensive reporting function makes the software perfect.

DEWETRON’s software packages PMT and DEWESoft POWER meet all the requirements and thus offer a comprehensive solution for measurement, ealuation, reporting and completely automised measuring and test procedure.

Some Details

Various Power Modules With the DEWESoft power module an arbitrary number of power lines can be measured simultaneously. E.g. wind energy plant: UNV / UMV / UHV / UDC


Individual setup of the number of harmonics including DC (Example: sampling rate 20 kHz = max. 200 harmonics @ 50 Hz)

Values adjusted to the actual power frequency

Evaluation of 2-9 kHz in 200 Hz bands


PST and PLT with adjustable intervals


Flicker emission (current flicker) according to IEC 61400-21

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Remote Control By using the remote control, instruments can be configured and data evaluated without being on site. You can do this when being in the office for example.

GPS sync With the help of the GPS function several measuring instruments, that are a few kilometers away from each other (e.g. off-shore wind park and on-shore substation), can be synchronized. The highly accurate clock (100 ns) is even available in case of interference with reception. Phase measurements and angle comparisons are a typical application for this function.

Acoustic/Noise Level Measurement The residents in whose surroundings these wind power plants have been constructed must not be affected by any noise of the power plants exceeding the legally accepted limit values – noise level measurement is also made possible with the help of the DEWE-XXX-PNA/PFR: Accurate and high-resolution noise level measurements following IEC 60651, 60804, 61672. DEWESoft and its user-friendly interface convince and bring the sophisticated noise-/acoustic analysis to the customer.

Customers Producers of wind energy plants

Non-productive industries in the field of wind power plants

Companies responsible for maintenance and energy supply

Operators of wind power plants


Product flyer DEWE-XXX-PM

Product flyer DEWE-XXX-PFR



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Power Fault RecordingDEWE-PFR Power Fault Recorder and Quality-Monitor

The DEWE-8xx-PFR power fault recorders are network analyzers for low, medium and high voltage systems. Because of the flexibility of the software, many functions can be done in a single box - from fault recording to RMS monitoring. Up to 16 (48) analog channels voltage or cur-rent. Along with its main task of monitoring and record-ing RMS values, PFR-8xx identifies and stores faults as waveforms for detailed analysis. A unique capability of this system is that it can also use calculated line-to-line channels for these events.

Data can be stored both locally on the PFR‘s internal hard drive, or to a central SQL database. Our flexible system architecture means that multiple databases are supported for one or more PFR systems as well as other DEWETRON instruments. This system-wide interoperabil-ity is a feature also unique to DEWETRON.

Key Features

Monitoring of power supply systems

Power plant testing and monitoring

High-, medium- and low voltage systems

Fault recording

Harmonics, Flicker

Power flow

IEC 61000 conform

DIP measurements

Database storing

GPS synchronisation

Remote control

EN50160

ITIC (CBEMA)

UNIPEDE

Online Informationwww.dewetron.info/power




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DEWE-8xx-PFR Power Fault Recorder and Quality MonitorThe DEWETRON Power fault Recorder and Power Quality Monitors can handle many different tasks at the same time in the same box – and this is why DEWETERON PFRs are different: Full flexibility in Hardware and Software is our main advantage.

With ONE BOX you can do for example all this at the same time:

Transient Fault Recorder (TFR)

Disturbance Fault Recorder (DFR)

Voltage Recorder (replacement of paper recorders)

Power Quality Monitor (PQM)

Power Measurement (PM)

Monitoring Systems with Central Server TechnologyBecause of technical needs and market rules it comes up more and more that power network companies are building up monitoring systems for power fault recording and quality monitoring. Those networks can be made based on PFR technology with standard internet interfaces and central SQL Servers. The Data evaluation is made with the help of the strong Software PMT on multiple client computers. Email based automatic reports are just one feature of those large Systems.

Database storing

RMS trend analysis with PMTTransient selection

Fault evaluation

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DEWE-821-PFR – Small SubstationsThe typical application for the DEWE-821-PFRare medium voltage substations with asmall number of feeder lines.

DEWE-8xx-PFR – Stand alone Systems

DEWE-818-PFR – Large Substations and Maximum FlexibilityThe DEWE-818-PFR as the most flexible system in Hard and Software is the right instrument for large substations in all voltage levels. Beside voltage and current even all other physical parameters can be monitored as well.

For application where no data network is required, very small applications or test bench applications the DEWE-8xx-PFR can be used as a stand alone system as well.

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DEWE 818 PFR DEWE 821 PFR DEWE 820-16 PFRApplication Transmission and Distribution Grid Transmission and Distribution Grid Transmission and Distribution Grid

HV + MV HV + MV + LV HV + MVhighest flexibility in configuration 16 channels maximum

Analog inputsNumber of channels up to 48 U or I 4 U / 4 I up to 16 U or I

16 per Rack DEWE-30-16-PFR or 8 U / 8 I 3 Racks per PFR possible or 12 U / 12 I

use Option821-PFR-ADD-4U-4I once or twice

Voltage DAQP-HV-SC Range Up to 1400 VRMS (1400 VPP) DAQP-HV-SCIsolation 4 kVBandwidth DC - 300 kHz

Please find specs in the modules table Accuracy < 0.1 % of range Please find specs in the modules tableCurrent DAQP-LA-SC Range 5 ARMS DAQP-LA-SC

Bandwidth DC - 25 kHzPlease find specs in the modules table Accuracy < 0.5 % of range Please find specs in the modules table

Alternative current input DAQP-LA-SC DAQP-LV-SCVoltage 10 VPEAK

Please find specs in the modules table Accuracy < 0.1 % of range Please find specs in the modules tableAlternative current input External Amplifier on DAQP Modules Ampflex Integrated amplifier External Amplifier on DAQP Modules

Accuracy < 1 % of range

Digital InputsNumber of channels Multiples of 8 Multiples of 8 8 / 16 / 24 / 32RecordingResolution 16-bit 16-bit 16-bitMemory 200 GB HDD, solid state on demand 200 GB HDD, solid state on demand 200 GB HDD, solid state on demandFault recording

Sampling rate 10 kHz; Up to 1.0 Msamples/sec 10 kHz; Up to 1.0 Msamples/sec 10 kHz; Up to 1.0 Msamples/secPre fault time Selectable Selectable SelectablePost fault time Selectable Selectable SelectableTotal fault time Selectable Selectable SelectableTrigger arguments Each measured or computed parameter, Each measured or computed parameter, Each measured or computed parameter,

window/edge, leave/enter window/edge, leave/enter window/edge, leave/enterDisturbance recording

Sampling rate 1/2 cycle, full cycle, 2 cycles 1/2 cycle, full cycle, 2 cycles 1/2 cycle, full cycle, 2 cyclesOverlapping 0%, 25%, 50%, 75 % 0%, 25%, 50%, 75 % 0%, 25%, 50%, 75 %Values U, I, P, S, Q, PF U, I, P, S, Q, PF U, I, P, S, Q, PFTrigger arguments Same as fault recording Same as fault recording Same as fault recording

Data loggingIntervalls 1 sec, individual multiples 1 sec, individual multiples 1 sec, individual multiplesRecorded parameters RMS, max, min, average RMS, max, min, average RMS, max, min, averageValues U, I, P, Q, S, D, PF, cos Phi, f U, I, P, Q, S, D, PF, cos Phi, f U, I, P, Q, S, D, PF, cos Phi, fHarmonics U, I, P, Q, cosPhi, THD, max order U, I, P, Q, cosPhi, THD, max order U, I, P, Q, cosPhi, THD, max order

individual, depending on sampling rate individual, depending on sampling rate individual, depending on sampling rateSymm components Pos / neg / zero sequence of U and I Pos / neg / zero sequence of U and I Pos / neg / zero sequence of U and IFlicker Pst, Plt Pst, Plt Pst, Plt

Measurement standard IEC 61000-4-30 Class A IEC 61000-4-30 Class A IEC 61000-4-30 Class A

ReportsStandard EN50160 short EN50160 short EN50160 short

EN50160 long EN50160 long EN50160 longIEC 61000-2-4 IEC 61000-2-4 IEC 61000-2-4IEC 61000-2-2 IEC 61000-2-2 IEC 61000-2-2Unipede Unipede UnipedeCBEMA ITIC CBEMA ITIC CBEMA ITICIEC 62040-3 IEC 62040-3 IEC 62040-3SEMI F47 SEMI F47 SEMI F47

Flexible on demand / user programmable on demand / user programmable on demand / user programmable

Database accessConnection ODBC ODBC ODBCServer MS SQL MS SQL MS SQLData structure open, described open, described open, describedTopologic overview Software PM Software PM Software PMData evaluation Software PMT Software PMT Software PMTBackup MS SQL support MS SQL support MS SQL support


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System timing DEWE 818 PFR DEWE 821 PFR DEWE 820-16 PFRInternal Internal clock Internal clock Internal clockNetwork time Ethernet sources Ethernet sources Ethernet sourcesGPS time source External antenna External antenna External antennaCommunication interfacesHardware interfaces Ethernet Ethernet Ethernet

RS-232 RS-232 RS-2322*USB 2*USB 2*USB

Monitor interface VGA VGA VGASoftware interfaces TCPIP TCPIP TCPIP

D COM (DEWESoft) D COM (DEWESoft) D COM (DEWESoft)Active X Active X Active X

Status relays 8 relays up to 96 8 relays on demandFront panel displays 8 LED up to 96 8 LEDPower supplyinput voltage

AC 110/230 V 50/60 Hz 110/230 V 50/60 Hz 110/230 V 50/60 HzDC On demand: for example 48 / 110 V On demand: for example 48 / 110 V On demand: for example 48 / 110 V

SafetySafety Test IEC 61010-1 IEC 61010-1 IEC 61010-1EMV protectionESD IEC 61000-4-2 IEC 61000-4-2 IEC 61000-4-2

8 kV contact; 15 kV air 8 kV contact; 15 kV air 8 kV contact; 15 kV airEMV EN 55011 EN 55011 EN 55011

class A class A class APower supplySurge IEC 61000-4-5 4 kV IEC 61000-4-5 4 kV IEC 61000-4-5 4 kV Burst IEC 61000-4-4 4 kV; L, N, PE IEC 61000-4-4 4 kV; L, N, PE IEC 61000-4-4 4 kV; L, N, PEVoltage inputsSurge IEC 61000-4-5 4 kV IEC 61000-4-5 4 kV IEC 61000-4-5 4 kVBurst IEC 61000-4-4 4 kV IEC 61000-4-4 4 kV IEC 61000-4-4 4 kVCurrent inputsSurge IEC 61000-4-5 2 kV IEC 61000-4-5 4 kV IEC 61000-4-5 2 kVBurst IEC 61000-4-4 2 kV IEC 61000-4-4 4 kV IEC 61000-4-4 2 kVShock and Vibration

Desktop or rack mount installation only Desktop or rack mount installation only Desktop or rack mount installation onlyEnvironmentTemperature (T.op) 0 to +50 °C 0 to +50 °C 0 to +50 °CTemperature (T.store) -30 to +70 °C -30 to +70 °C -30 to +70 °CHumidity 10 to 95 %, non condensing 10 to 95 %, non condensing 10 to 95 %, non condensingCase enclosure 19" rack mount chassis, 4U+3U for 19" rack mount chassis, 4U 19" rack mount chassis, 4U

DEWE-30-16 PFRDimension (W x D x H) 437 x 304 x 177 mm (17.2 x 12 x 7 in.) 437 x 443 x 177 mm (17.2 x 17.4 x 7 in.) 437 x 443 x 177 mm (17.2 x 17.4 x 7 in.)

Weight typ. 10 kg (approx. 22 lb.) + 6 kg per DEWE-30-16-PFR typ. 10 kg (approx. 22 lb.) typ. 10 kg (approx. 22 lb.)

+ 6 kg per DEWE-30-16-PFR

Shock and vibration

Module Input type Accuracy RangesBandwidth (BW),Filters (LP = lowpass,HP = highpass)

Isolation (ISO),Overvoltageprotection (OP)

Specialfunctions

DAQP-HV/HV-SC High voltage < 0.1 % ±20, ±50, ±100 V BW: 180 kHz ISO: 1.8 kVRMS

of range ±200, ±400, ±800, ±1400 V LP: 10, 30, 100, 300 Hz Burst/Surge 4 kV1, 3, 10, 30, 100, 300 kHz

DAQP-LA/LA-SC Current ±0.05 % ±0.1, 0.3, 1, 3 A BW: 300 kHz ISO: 1.4 kVRMS of range ±10 A peak, ±30 A peak LP: 10, 30, 100, 300 Hz

max. 5 A RMS contin. Current 1, 3, 10, 30, 100, 300 kHz

DAQP-LV/LV-SC Voltage, ±0.05 % ±10, ±20, ±50 mV BW: 300 kHz ISO: up to TEDS support,current (option) of range ±100, ±200, ±500 mV LP: 10, 30, 100, 300 Hz 1 kVRMS also for µV and

±1, ±2.5, ±5, ±10, ±25, ±50 V 1, 3, 10, 30, 100, 300 kHz OP: 350 VDC potentiometermeasurement

High voltage measurement

Voltage & current measurement

Please find further DAQ-modules on our webpage: www.dewetron.com

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The DEWESoft POWER Measurement Software

Power Network Analysis and Power Fault RecordingThe Option POWER for the DEWESoft is a very powerful tool for calculating power and other related parameters - it is more then just multiplying voltage and current. Several strong functions are combined in this powerful software and with the help of this nearly any application can be done with DEWETRON instruments.

Beside the accurate calibration the frequency computation is a key feature inside. 50 Hz and 60 Hz are a must - for us also 16 2/3, 400 and 800 Hz are a must and of course DC and variable speeds. The high sampling rate (mainly depending on the A/D board, up to 1 MS/s) and the DAQP-HV module give no limitation in sampling PWM drivers (180 kHz bandwidth) and calculating power, active power, reactive power power factor etc... The strong toolbox of Power Quality Paramaters like Harmonics, Interharmonics, THD, symmetrical components and Flicker together with the broad range of trigger conditions make an open unlimited power analyzer out of the instrument. Several displays like Vectorscope, Harmonics screen, Oscilloscope and the Recorder functions allow a perfect visulisation of the data.


Calibration/AccuracyThe high accuracy of the calculation can be reached because of the calibration function in the frequency domain. With this unique technology amplitude and phase can be corrected for the full frequency range from DC up to whatever the hardware can sample (kilosamples up to megasamples per second). All internal curves like filter response or multiplexer shift are corrected inside the software and the sensor database includes correction curves for each clamp, rogowski coil, transformer or which sensor ever is used.

Wiring SchematicsDifferent wiring schematics allow all possible connections. These are single phase, star connection, delta connection, V connection, Aron connection and a combined star / delta connection. All of course with or without currents.


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Scope Selectable graphs












Zoom in and out



N over M as example for this function

Reporting Function Direct report printout

Data export for enhanced post analysis in other applications

PMT as reporting and analysis tool

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FFT U, I, P and Q





THD, THD even, THD odd


Background harmonics

Full FFT In addition to the harmonics FFT a full frequency based FFT is available.











Fault Recorder Trigger on all parameters of the power module!


Each harmonic!


Very fast glitch detection (MS/s)

Edge-, filtered edge- and window-trigger Trigger on rising edge when the threshold has been crossed

Trigger on falling edge when the threshold has been crossed

Trigger when signal enters the range between two definable threshold levels

Trigger when signal leaves the range between two definable threshold levels



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Additional FeaturesVideoThe parallel usage of the synchronous DEWESoft VIDEO function allows the user to store videos in parallel with the data recording and opens a wide range of applications – whenever an optical information is needed!


Math FunctionsWith the additional MATH Function of DEWESoft calculations of for example efficiency, difference of input, output and phase angle differences can be implemented easily. Use all POWER parameters as input value!



Logic function

Signal generator

Event functions

d/dt, integration


Transfer curve function


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PMT: Power Data Base Storing and Report GenerationIn several applications, especially when it is necessary to evaluate data over long periods, with different sampling rates or in parallel to their aquisition, it might be necessary to use a really strong database tool. Therefore DEWETRON has developed the DATABASE OPTION as an add-on to DEWESoft.

Beside data storing there is also a strong reporting tool available. Diagrams, FFT spectras, Fault reportings and statistic functions are the basic functions and additional reports can be added by using the plug in Technology. Nice Visual Elements can be used to get a good overview about the full measurement system.

Reports like EN50160 or IEC 61000-2-4 can be easily generated as well as large customised reports on the users needs.

Database storing

RMS trend analysis with PMTTransient selection

Fault evaluation

Data Base Storing

Key Features: Long time data acquisition

For instruments

For PFR systems

Storing of logged data

Different storing intervals

Waveform data as fault records

RMS shapes as disturbance faults

Cross trigger

Diagrams

Histograms

FFT spectra

Fault lists

Fault diagrams

Alarm lists

Topological overview

DIS DIP statistics

CBEMA / ITIC curve

Large Report Generator

Sum reports

User levels

Auto update

SQL database with defined tables

Plugin interface

Email support

PDF support

SNMP support


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Data Presentation with PMT:Diagrams

Single Diagrams or multiple Diagrams on one page

Individual number of channels per diagram

Graphical view or statistical view in a table

Table individual configurable

Min / Max / Avg Calculation

Up to 5 Percentage Calculations (eg 95% value) per channel


Direct comparison of different days



Math channels

Histograms Histogram calculation

Med / Stddev / Var / Mod calculation

Individual definition of sidebands


Energy line

FFT Spectra Individual number of harmonics (25, 50, …)

Voltage, current, active power, reactive power, phase angle, impedance

Limits according standards (EN50160, IEC61000-2-4, individual definition)

Max / Avg / 95% calculation and comparison against limits

Timestamp or intervals of data presentation

More subgraphs per page possible

More datalines in one graph




3D graph

Fault Lists Listings of faults

Filters like time, channel, type etc..




Fault Diagrams Waveform presentation of faults

RMS shape calculation

Different setups for different faults


FFT

Math channels

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Alarm Lists

Alarm list definition




Topological Overview Topological online view of instruments

Status

Faults

Combination with different diagrams

Start of different setups

DIS DIP Statistics Statistics like DISDIP/Unipede etc.

Individual limits


Graphical or table element


CBEMA / ITIC curve Statistics like CBEMA, SEMI F47 etc..

Individual limits


Combination with DISDIP possible

Graphical view


Reports Built-in report generator for flexible reports

Combination of different diagrams in one report

Tables

FFT spectras

Disdip statistics

CBEMA curves

All other view elements supported

Sum reports over multiple stations

Auto generation and print support

Notification

Email

SNMP

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Power Fault Records and Power Monitoring in Energy Transmission Grids

Introduction The changing energy market and consumer technologies have also influenced the requirements for the power fault recorders. When formerly it was sufficient to know the voltage value and curve progression, we do nowadays want to know the reason for disturbances but also anomalousness to the normal mode in detail. Power quality issues are always a part of it and power flows in all four quadrants are daily work.

Task Such modern fault recorders are meant to take over the functions of several instruments and should additionally be of perfect use to up-to-date communication systems in order to centrally provide the data to several user groups.

Digital fault recorders fast (wave form, a few seconds)

Digital fault recorders slow (periodic values, several minutes)

Voltage monitoring

Paper recorder replacement

Power quality monitors

Load curve monitoring

One central data base solution should not only be able to centrally store the data but rather support an automated reporting system. E-mail notification in case of an error, automatically updated recorder feature and the integration in existing scada systems are among the required functions. Report generator and on-screen reports are standard.

Solution

Hardware DEWETRON’s reaction to this is the fault recorder concept DEWE-xxx-PFR. Due to the very different requirements of individual transformer stations a very simple and flexible hardware system is obligatory. Based on the DEWE-xxx-PFR systems these requirements can be met. Arbitrary number of channels, easy change of voltage and current input channels, user-friendly maintenance and cascading




Application Example for Power Fault Records

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possibility characterize this instrument group. Moreover, highest EMV (electromagnetic compatibility) requirements are necessary. Differential input channels, isolated circuits and secure current paths are guaranteed by the DAQP-HV and DAQP–LA modules.

SoftwareThe measurement software DEWESoft, combined with the analysis and evaluation package PMT, fulfills all needs of a monitoring system for energy grids.

U,I

P,Q,S, cosPhi

Fault records fast, full sampling rate

Fault records slow, periodic values

Fundamental oscillation values

Harmonics, THD, k-factor

Flicker

3~ systems

2~ systems

Flexible report generator

Monitoring possible from any location

Differently frequent systems on one data acquisition system

Remote maintenance

Special Features

Time Synchronization The chronological synchronization of the fault recorders can either be done via the LAN or externally via GPS or DCF77 clocks. Using the LAN way it does not even matter which protocol is available: SNTP or NTP via TCP or UDP.

GPS Synchronization/Phasor MeasurementThe PPS impulse (synchronous impulse via satellites with an accuracy of 1 nanosecond) provides absolutely synchronous measurements between the transformer stations. This impulse is split into the sampling rate (e.g. 20 kHz) and then used as clock signal for the A/D converter. A comparison of phase angles over wide distances can thus easily be done via the online system.

CrosstriggerFault recording is the main feature of these instruments. It is also possible to send the trigger reason for the fault record to other fault recorders in the net and thus obtain global recordings. The synchronization is reached by sending the exact time stamp. At the same time, the data from the circular buffer are stored and evaluated.

E-Mail, SNMPAnother very useful function is the e-mail support. Triggers of fault records, the reaching of limit values, instrument errors or also communication problems are sent to personally defined user groups via e-mail. Similar possibilities are offered by SNMP. Reports such as e.g. weekly analyses can also be automatically generated and sent.

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Online Monitoring Direct access to the fault recorders provides authentic online monitoring. Additionally, saved data can be automatically updated as diagrams and fault records automatically show the latest entries.

Open Data Base Structure The structure of the data base is disclosed for the user. Individual reports, websites or special analyses can easily be added to the data. We are also pleased to offer user-specific solutions.

Customers Energy supply companies

Grid operators

Facility management

Operators of data processing centers

Hospitals

Further Information Product flyer DEWE-XXX-PFR

Procuct flyer DEWE-XXX-PNA



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Monitoring Power Supply of Electrical Railway Systems

Introduction Nowadays, the electrical energy supply of railways is in many places autonomic and disconnected from the classical railway business. Mostly, these are individual companies, sometimes they belong to the railway company. As is the case in modern energy service companies we do also have a clear separation of electrical energy supply and transmission in this case. These transmission companies work the same way as all grid companies and are subject to similar market regulations.

The railroad network is often used by other locomotive operators. These compete against each other and against the railway companies. A free market has developed with defined regulations.

For energy supply this means that these companies have recently become service providers in the field of energy supply, have customers, distribute and transmit current and have to obey similar product liability law as do conventional energy service providers. Power quality has also become a keyword in this field.

Task On the one side, transformer stations in railroad networks provide transformation and transmission of electric energy from customer generation to other sub-plants. On the other side, they are often connection points between the original railroad networks (overhead traction line) and a pre-located public power supply.

Thus, there are explicit property lines of electric energy and the supplier must assure power quality (service reliability). Monitoring systems for power supply of electric railroads can provide clear information on the voltage waveform. Railroad networks often have other frequencies than public networks (16.7 Hz, 25 Hz, DC etc.) and are furthermore not synchronous.

On the one hand, the network operator is interested in voltage quantity, harmonics, power flow direction, reactive power flow and on the other hand, in conventional disturbance records. A system that unifies all this, that can observe differently frequent power grids at the same time and that can take use of modern communication systems is required in this case.





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Solution

Hardware Due to very different requirements of individual transformer stations a very flexible and basic hardware system is necessary. Based on the DEWE-818-PFR systems these requirements can be fulfilled. Arbitrary numbers of channels, easy change of voltage and current input channels, user-friendly maintenance and cascading possibilities characterize this instrument group. Moreover, highest EMC standards are necessary. Differential input channels, isolated circuits and secure current paths are guaranteed by the DAQP-HV and DAQP-LA module.

For portable applications we offer module based DEWETRON instruments among which the DEWE-2600-PM is the most qualified and applicable one.

Software The measurement software DEWSoft combined with the analysis package PMT fulfils all requirements of a monitoring system for power quality in railway networks.

U,I

P, Q, S, cosPhi

Fundamental components

Harmonics, THD, k-factor

Flicker (50 Hz)

Fault records

3~ systems

2~ systems

Differently frequent systems on one data acquisition system

Flexible reporting system

Monitoring can be done while being on any plant location

Remote maintenance

Time synchronisation via LAN or GPS

Customers Operators of railroad networks

Plant manufacturer

Further Information Product flyer DEWE-XXX-PFR

Product flyer DEWE-XXX-PM



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Harmonic Monitoring of High-Voltage Power Lines




Introduction High-voltage DC lines are used for the transport of energy over long distances, sometimes for submarine cables or also for the connection of grids with different frequencies. Typically, we talk about 1 million volt and some thousand amperes. The latest project in which we were involved had a transmission rate of 3 GVA. The picture shows such a transformer station at the end of a 1.000 km long DC line.

TaskWhen we talk about HVDC then we mean semiconductors and converters. These converters are electronic switches that cannot utilize the whole sinus of the alternating voltage and thus produce harmonics. Some of these harmonics are also measurable on the side of the direct current of the converters. All harmonics must be limited and, if necessary, also filtered. Several coils and capacitors are necessary for this. When these filters are detuned it is important to receive an alarm message. Some parameters such as THD, THFF and EDC have to be monitored as well. All in all we talk of more than 200 measurement points. On each point 50 harmonics including DC values must be calculated every 200 milliseconds. As the measuring transformers are on various locations, the measuring systems have to be distributed and set up on various places as well. The measurement of the DC values requires a special solution as well. An interesting detail is the measuring of harmonics on the direct current side as in this case the fundamental oscillation is naturally not existent.

Solution

Hardware Based on the DEWE-8xx-PFR series the hardware solution can easily be designed. The 19” rack systems are perfect for the whole equipment and the use of DAQP-HV, DAQP-LV and DAQP-LA modules respectively and allow any input configuration for such large-scale projects.


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Software As a basis the software package DEWESoft with its options POWER and DB (OMT report generator) are used. Special features such as THFF and EDC are added via a separate DC library as plugin. Communication with the central server is provided by the DB option. This is the system that stores all DEWESoft data on one central SQL server and that was developed for long-term analyses. The strong report generator (PMT) is used for the evaluation and presentation of data.

Some Details

Measuring AC Parameters on the DC Line In order to be able to measure harmonics on DC lines, you have to know the exact frequency on the AC side. For that purpose, an AC instrument measures the frequency and provides this information as measuring channel to all other instruments via the LAN. This frequency channel serves as a basis for the calculation of the harmonics in DEWESoft POWER. The measurement of direct current is an interesting detail as well and is solved by a Rogowsky coil and fiber optic conductors for signal transmission. Due to these fiber optic conductors the galvanic isolation could be solved efficiently.

Highly Precise Harmonics Calculation for the EDC Factor CalculationThe EDC factor reflects the electric contamination of the DC line. This value – the “Equivalent Disturbing Current” – is calculated out of the difference of the two conductor currents of the harmonics only. These are very small (100 mA) compared to the nominal current of the line (3000 A). The amount and the phase have to be highly precise and the table shows the result: Errors in the range of 0.0x % of the measurement range!

SN 566 SN 567 Error on value % Error on Range % (max 15A)h f [Hz] I [A] I1 A I2 A Phi I1 I2 Phi I1 I21 50 1 0,991 1,001 179,669 0,90% -0,10% 0,18% 0,06% -0,01%2 100 1 1,000 1,000 179,975 0,00% 0,00% 0,01% 0,00% 0,00%3 150 1 1,013 1,014 179,938 -1,30% -1,40% 0,03% -0,09% -0,09%4 200 1 0,999 0,999 179,981 0,10% 0,10% 0,01% 0,01% 0,01%5 250 1 0,997 0,995 179,973 0,30% 0,50% 0,01% 0,02% 0,03%6 300 1 0,992 0,990 179,995 0,80% 1,00% 0,00% 0,05% 0,07%7 350 1 1,022 1,018 179,969 -2,20% -1,80% 0,02% -0,15% -0,12%8 400 1 1,026 1,024 179,986 -2,60% -2,40% 0,01% -0,17% -0,16%9 450 1 1,016 1,014 179,984 -1,60% -1,40% 0,01% -0,11% -0,09%10 500 1 0,995 0,993 179,985 0,50% 0,70% 0,01% 0,03% 0,05%11 550 1 1,006 1,004 179,945 -0,60% -0,40% 0,03% -0,04% -0,03%12 600 1 1,008 1,007 179,994 -0,80% -0,70% 0,00% -0,05% -0,05%13 650 1 1,003 1,002 179,988 -0,30% -0,20% 0,01% -0,02% -0,01%14 700 1 0,994 0,993 179,990 0,60% 0,70% 0,01% 0,04% 0,05%15 750 1 0,999 0,998 179,979 0,10% 0,20% 0,01% 0,01% 0,01%16 800 1 1,000 0,997 179,930 0,00% 0,30% 0,04% 0,00% 0,02%17 850 1 0,997 0,994 179,962 0,30% 0,60% 0,02% 0,02% 0,04%18 900 1 0,999 1,000 180,000 0,10% 0,00% 0,00% 0,01% 0,00%19 950 1 0,998 1,004 179,975 0,20% -0,40% 0,01% 0,01% -0,03%20 1000 1 0,994 1,005 179,971 0,60% -0,50% 0,02% 0,04% -0,03%21 1050 1 0,998 1,006 179,942 0,20% -0,60% 0,03% 0,01% -0,04%22 1100 1 0,999 1,004 179,957 0,10% -0,40% 0,02% 0,01% -0,03%23 1150 1 0,998 1,000 179,992 0,20% 0,00% 0,00% 0,01% 0,00%24 1200 1 0,996 0,995 179,965 0,40% 0,50% 0,02% 0,03% 0,03%25 1250 1 0,991 0,988 179,960 0,90% 1,20% 0,02% 0,06% 0,08%26 1300 1 0,995 0,992 179,971 0,50% 0,80% 0,02% 0,03% 0,05%27 1350 1 0,996 0,994 179,996 0,40% 0,60% 0,00% 0,03% 0,04%28 1400 1 0,997 0,994 179,983 0,30% 0,60% 0,01% 0,02% 0,04%29 1450 1 0,996 0,994 179,992 0,40% 0,60% 0,00% 0,03% 0,04%30 1500 1 0,994 0,992 179,974 0,60% 0,80% 0,01% 0,04% 0,05%31 1550 1 0,998 0,996 179,993 0,20% 0,40% 0,00% 0,01% 0,03%32 1600 1 1,000 0,998 179,990 0,00% 0,20% 0,01% 0,00% 0,01%33 1650 1 1,002 1,000 179,989 -0,20% 0,00% 0,01% -0,01% 0,00%34 1700 1 1,003 1,002 179,960 -0,30% -0,20% 0,02% -0,02% -0,01%35 1750 1 1,003 1,001 179,990 -0,30% -0,10% 0,01% -0,02% -0,01%36 1800 1 1,002 1,001 179,990 -0,20% -0,10% 0,01% -0,01% -0,01%37 1850 1 1,001 1,000 179,989 -0,10% 0,00% 0,01% -0,01% 0,00%38 1900 1 0,999 0,998 179,970 0,10% 0,20% 0,02% 0,01% 0,01%39 1950 1 0,995 0,994 179,977 0,50% 0,60% 0,01% 0,03% 0,04%40 2000 1 0,992 0,990 179,982 0,80% 1,00% 0,01% 0,05% 0,07%41 2050 1 0,994 0,995 179,970 0,60% 0,50% 0,02% 0,04% 0,03%42 2100 1 0,997 0,997 179,965 0,30% 0,30% 0,02% 0,02% 0,02%43 2150 1 0,998 1,001 179,948 0,20% -0,10% 0,03% 0,01% -0,01%44 2200 1 0,999 1,003 179,930 0,10% -0,30% 0,04% 0,01% -0,02%45 2250 1 1,001 1,004 179,989 -0,10% -0,40% 0,01% -0,01% -0,03%46 2300 1 1,000 1,005 179,954 0,00% -0,50% 0,03% 0,00% -0,03%47 2350 1 1,000 1,006 179,972 0,00% -0,60% 0,02% 0,00% -0,04%48 2400 1 0,998 1,006 179,932 0,20% -0,60% 0,04% 0,01% -0,04%49 2450 1 0,998 1,006 179,986 0,20% -0,60% 0,01% 0,01% -0,04%50 2500 1 0,996 1,005 179,467 0,40% -0,50% 0,30% 0,03% -0,03%

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ENERGY & POWER • Harmonic Monitoring of High-Voltage Power Lines

www.dewetron.com68

Customers Operators of transmission grids

Plant manufacturers that install DC lines

Advantages Flexibility of hardware and software

Entire project management from one source

Technical details of our technology:

AAF

Band width

Precision

Sampling rate

Software functions

Solution of the DC measurement and calculations

Further Information Product flyer DEWE-xxx-PFR



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DEWETRON Data Acquisition Solutions - LHM-instrumentation

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