Dry-type transformers and reactors Safe, reliable and energy ...

Dry-type transformers and reactorsSafe, reliable and energy-efficient

Dry-type transformers

Overview

2 | ABB dry-type transformers and reactors

ABB´s mission: meeting customer needsABB is a global leader in power and automation technologies that helps its utility and industrial customers to use electrical power effectively and maximize sustainable industrial productivity.

By working with ABB, customers have access to a worldwide network of factories, as well as the most up to date technologies. ABB provides the highest quality, service and solutions for standard and special products by serving the clients locally.

ABB transformersGlobally, ABB is the number one transformers manufacturer, offering the widest portfolio from 1,200 kV transmission transformers down to low-voltage residential. Beyond offering standard liquid-filled and dry-type technologies, ABB can help customers with special and demanding transformer applications like industrial drives, High Voltage Direct Current (HVDC) applications, as well as transformers for trains or wind turbines.

ABB dry-type transformersWith factories in nearly every continent, ABB‘s strong global presence is serving customers around the world. Proof is a large variety of product references installed and in service worldwide.

ABB dry-type transformers and reactors are produced in dedicated focus factories summing to the largest production capacity of any manufacturer globally.

The benefit to customers is fast delivery of standard and tailor-made distribution transformers (up to 63 MVA and 72.5 kV voltage class) that conform to customer specifications everytime.

Portfolio overview– Standard dry-type transformers– EcoDry: ultra-efficient transformers– TriDry: triangular transformers (reduced noise and losses)– HiDry72: dry-type power transformers for subtransmission

(up to 63 MVA and 72.5 kV)– hi-T Plus: increased overload capability and lifetime– Submersible transformers for network applications– Reactors, inductors, chokes: for Alternating Current (AC)

and Direct Current (DC) applications– Low Voltage (LV) transformers– Water-cooled transformers and reactors– Customized dry-type transformers and reactors for special

applications: converters, marine, wind turbines, railways and rolling stock

ABB dry-type transformer benefits

ABB dry-type transformers and reactors | 3

A large variety of applications demand technologies which offer high safety, cost savings and environmental sensitivity.

Safety for people and property– No fire hazard– No special safety features required, such as fire suppression

systems– Zero leakage risk of flammable or contaminating substances– Non flammable and self-extinguishing

Easy and fast installation– Less space required– Less civil work needed

Reliability and quality– 40 years experience in dry-type transformer manufacturing– Several hundred thousand ABB dry-type transformers in operation all over the world– Long transformer life– Optimized design depending on specific application – Produced in high throughput, specialized factories– Well suited to damp and polluted areas– High short-circuit current strength

– High capacity to support overloads– High performance in case of seismic events– Withstands the most severe rolling and vibrating conditions– Virtually maintenance free

Ecological and environmental-safe– Environmentally conscience manufacturing– Able to be installed closer to the point of consumption,

reducing load cable losses – No risk for leakage of insulation fluids; hence, no ground or

water contamination

Dry-type solutions for different segments

IndustriesABB serves the whole industrial sector with dry-type transformers. Some industries have especially demanding requirements.

Nowadays, the oil and gas industry is one of the most important sectors in the world. Its scope covers a very wide range of on-land and off-shore duties, refineries or terminals. ABB’s dry-type transformers are particularly safe and eco-friendly; they ensure a maximum of reliability, enabling them to be used in virtually every environment.

Metal, mining and minerals, pulp and paper, and cement cover a very wide area of specialized industries, with transformer installations above ground, in open pit mines, and below the surface. As an example, ABB’s dry-type technologies are frequently used for shaft hoists, which provide entrance to underground mines.

Commercial and public buildingsIndustrial, public and commercial buildings are ABB’s largest dry-type installations in the industrial and commercial markets. Industrial and commercial is a vast market that also includes markets such as universities, hotels, shopping centers, data centers, high rise buildings, manufacturing and many others.

RenewablesABB is the technology leader providing the broadest portfolio of transformers suitable for installations inside a wind turbine either on the ground floor, at a first level, or in the most demanding location, the nacelle. The transformers are designed to withstand all types of ambient conditions including severe atmospheres of saline moisture, vibration conditions or heavy dust.

Solar energy is climate-friendly, extensively available and full of potential. In the future, solar energy can make an important contribution to a sustainable energy supply. ABB offers an ideal dry-type transformer for this particular application, with versatile utilization options.

Transportation: railways, subways and marine ABB dry-type transformers offer the best solution for railway applications, indoor or outdoor substation installations and rolling stock. The transformers can be installed close to the utilization point, which allows optimized installation design, minimizing the low voltage circuits with corresponding savings in losses and low voltage connections.

Dry-type transformers are ideally suited for use in marine applications (distribution and propulsion). This can range from small ferries or yachts, to the very largest of ships being built today. Transformers for marine purposes must be extremely reliable, as replacement costs are extremely high. Air-to-water cooled dry-type transformers offer options for high protection classes and an even more compact construction.

Utilities and power plantsDry-type transformers offer the same functionalities as liquid-inmersed. Dry-types are suitable for new or retrofit installations, and can be used for indoor and outdoor applications. They are used for generation, transmission and generation fields.



Distribution transformersDistribution transformers are installed in the electric distribution grid. Electricity is transformed from medium voltage (> 1 kV) to a low voltage which can be used by the end users.

Generation transformersThese transformers are particularly important for applications such as wind or solar. Generation dry-type transformers usually step the power from a low voltage up to a higher voltage.

Rectifier and converter transformersRectifier transformers are designed to survive the rigors of the application, and are especially capable to withstand overloads. Whether for industry, railways, or excitation, ABB has the experience.

Variable Speed Drives (VSD) transformers provide the voltage transformation as well as the galvanic separation that is necessary for motor drive applications. They can include several secondary windings, harmonics, electrical screen

or be installed in very demanding environmental conditions. Traction transformers feed systems in alternating current (autotransformers for catenary feeding) and also systems in direct current respectively. They include special demand overloading and withstanding rectifier harmonics.

Reactors, inductors and chokesReactors, also known as inductors or chokes, depending on their duty in the electrical circuit, are a passive electromagnetic component.

Reactors are used in power electronics, transmission and distribution applications. Reactive power compensation, harmonic filtering, motor starting, short-circuit limiting and neutral grounding are typical uses.

Dry-type solutions for different applications

A complete portfolio of dry-type transformers


A dry-type solution for every needApart from standard distribution transformers, ABB can provide a number of different products which have been optimized to meet specific requirements. ABB offers a full range of dry-type transformers with primary voltages through 72.5 kV built according to all major standards including IEC and ANSI. To minimize fire hazard and environmental contamination, dry-type transformers are requested more and more frequently. These transformers meet strict parameters with respect to electrical system demands, losses, and functioning in areas with extreme climatic conditions. ABB‘s dry and cast transformers are virtually maintenance free and are manufactured in accordance with industry and international standards including ISO 9001.

Product family: EcoDryUltra

100 kVA to 4,000 kVA

up to 36 kV

class F / H

industries, utilities and renewables

Power ratings

Voltages

Insulation

Main use

100 kVA to 4,000 kVA (amorphous core)

up to 36 kV

class F / H

utilities

Product family: EcoDryBasic

Power ratings

Voltages

Insulation

Main use

Product family: EcoDry99Plus

100 kVA to 63,000 kVA

up to 36 kV

class F / H

industries

Power ratings

Voltages

Insulation

Main use

EcoDry ABB´s EcoDry ultra-efficient transformers are designed to reduce energy consumption and minimize environmental impact. The EcoDry transformer can save up to 70 percent on no-load losses and reduce load losses by 30 percent. ABB offers three different EcoDry types to suit the customer’s particular application: for distribution transformers with a low average-load, the dry-type transformer EcoDryBasic, and for those with a high load profile, EcoDry99Plus. EcoDryUltra is used when periods of low and high load alternate quite often, or the average load is in the medium range. All EcoDry variants feature state-of-the-art materials and top-quality components, including amorphous metal as the core material, which has proven its durability in distribution transformers for more than 20 years.


TriDry The triangular shape of the TriDry transformer offers a lighter total weight. The transformer not only exhibits the general advantages of a dry-type transformer, but also an improved efficiency compared to standard models; hence, reducing operating costs. In addition, its symmetrical construction inherently reduces noise, harmonic content and stray magnetic fields. The TriDry makes an important contribution to grid stability and environmental protection.

Product family: TriDry

400 kVA to 2,500 kVA, others on request

10 kV and 36 kV

class F / H

utilities and industries

Power ratings

Voltages

Insulation

Main use

HiDry72

Historically, dry-type transformers are used for distribution and industrial applications with rated power and voltage not higher than 15 MVA and 36 kV respectively. ABB offers dry-type transformers for the 52 kV and the 72.5 kV voltage classes with a power rating up to 63 MVA. A dry-type on-load tap changer is also available. The special features of ABB´s subtransmission dry-type transformers are superior safety and environmental friendliness especially in urbanized areas, where fire hazard is a highlighted issue.

Product family: HiDry72

Power ratings

Voltages

Insulation

Main use

Others

up to 63 MVA

up to 72.5 kV

class F / H

utilities, industries, oil and gas

dry OLTC up to 72.5 kV


Submersible ABB has completed development of a dry-type transformer intended for network applications, including submersible installations. The unit is inside of a completely sealed tank and both tank and active assembly have been designed and tested to the IEEE C57.12.40 standard for network transformers (amended for dry-type features). The absence of oil eliminates the threat to the surrounding environment during an internal failure. Main features of dry-type submersible network transformer are: complete absence of oil, entirely welded tank assembly, nitrogen gas overpressure for tank deterioration monitoring, 2-position ground switch, 70 percent overloading capability, similar footprint to liquid-filled units with cooling fins and power rating up to 1,000 kVA and 15 kV primary voltages.

Product family: Submersible

up to 1,000 kVA

up to 15 kV

class F

utilities

Power ratings

Voltages

Insulation

Main use

hi-T Plus ABB‘s hi-T Plus transformer has an upgraded insulation level which allows overload capability along with increased service life. Typical designs have 25 °C of thermal safety factor built-in. This enhanced insulation makes ABB‘s hi-T Plus transformers the best choice for networks with high harmonic distortion, load peaks, sudden overloads and high ambient temperatures. This transformer does not require additional over sizing thus providing costs savings and a smaller size as compared to a traditional class F transformer.

Product family: hi-T Plus

up to 40,000 kVA, others on request

up to 36 kV

class H

railways, wind, data center

Power ratings

Voltages

Insulation

Main use


Product family: Reactors

on type and technology

36 kV

class F or H

general industries, utilities and power electronics

Power ratings

Voltages

Insulation

Main use

ReactorsReactors are fundamental components in power quality management. From phase-shifting to harmonic suppression, these components are used in a large variety of applications and in many industrial activities. Cast resin or Vacuum Pressure Impregnated (VPI) insulation technologies, medium and low voltage, AC or DC, single or three phase, air and iron core. Reactors are generally customized according to technical specification and supplied from a few pieces to high volume. Losses reduction, cost alignment and signal shaping could be translated into an overall cost reduction for the equipped applications.

Low Voltage transformersABB designs and manufactures LV transformers using the VPI technology. These transformers are used in many applications including, in commercial buildings, on board of vessels as well as in deep mines and industrial environment. Transformers with higher power rating are usually protected in appropriate enclosures sometimes equipped with Air-Forced, Water-Forced (AFWF) cooling system. In the power range, applications include galvanic separation or voltage adaptation. Autotransformers are also manufactured, giving a compact and economic solution to simple requirements.

Product family: Low Voltage transformers

up to 10 MVA

up to 1,000 V

class H

general industries, utilities and buildings

Power ratings

Voltages

Insulation

Main use


Water-cooled transformers and reactorsLiquid cooling can be indirect or direct-in direct contact with electrified parts. These particular components are more and more often used in order to directly remove the heat from the magnetic component and to reduce dimensions and weight, or avoid heating in enclosed cabinets. Modern power converters often use water cooling. The same water cooling circuit can also be used for cooling the magnetic components. LC or LCL filters can be installed in very compact cabinets and easily fit in a modular converter system.

Transformers and reactors for rolling stockFor years, ABB has supplied special customized solutions for transformers and inductors mounted on board of trains or metros. The advanced experience and the state of the art Finit Element Analisys (FEA) software permit an optimized solution to all different needs and application for rolling stocks. Typical applications are line filter, DC chopper, auxiliary transformer for locomotives and railway carriages, reactor for main and auxiliary converter.

Product family: Water cooled transformers and reactors

depending on technology

typically < 1 kV, up to 36 kV

class B

general industries, power electronics and renewables

Power ratings

Voltages

Insulation

Main use

Product family: Transformers and reactors for rolling stock

depending on technology

DC or 15 kV/16,7 Hz and 25 kV/50 Hz railway voltages

class H

rolling stock

Power ratings

Voltages

Insulation

Main use

Customized technologies for special needs


Vacuum cast coilThe vacuum cast coil encapsulation process is carried out under the most rigorous quality controls to ensure optimum insulating and mechanical characteristics. Inside the vacuum casting chamber, the resin is introduced into the mould so all components are mixed together just before the casting process, filling interstices and allowing the finished winding to reach the lowest level of partial discharge. ABB vacuum cast coil is the only cast resin transformer certified by UL with a thermal Index of 180 °C (class H) according to ANSI C57.12.60.

RESIBLOCThe RESIBLOC transformer is a significant development in the range of dry-type transformers and plays a decisive role in most demanding projects and fields of applications for more than 40 years. The glass fibre reinforced transformer offers an extremely robust and proven design with outstanding short circuit performance for transformer requirements and meets the high demands from the different industries, e.g., the RESIBLOC transformer has been tested both in the laboratory and in practical operation and is qualified for temperatures of -60 °C. The RESIBLOC transformer is extremely versatile, and most customer specifications can be adopted with relative ease. The RESIBLOC transformer is available with ratings up to 63 MVA and operating voltages of up to 72.5 kV.

Open Wound / VPIOpen Wound dry-type transformers use the oldest coil transformer technology, with a long history of high performance and economical value. These dry transformers are VPI with a high temperature polyester or epoxy varnish. The coils can be manufactured with an aramid fiber based insulation system that is third party certified for the 220 °C thermal class; the highest of all transformer technologies. With their long history of performance and value, ABB’s VPI Open Wound transformers can be found in all areas of MV distribution applications.

ABB dry-type transformers offer customized solutions through the multiple design options and all available accessories such as:– Dry-type on-load tal changer (OLTC)– Enclosure IP/NEMA– Cooling fans with up to 50 percent power increase– Arc-proof enclosures or UFES active arc fault protection system

Contact us

ABB Management Service Ltd.Affolternstrasse, 44P.O. Box 81318050 Zurich, Switzerland

www.abb.com/transformers

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Note:The information contained in this document is for general information purposes only. While ABB strives to keep the information up to date and correct, it makes no representations or warranties of any kind, express or implied, about the completeness, accuracy, reliability, suitability or availability with respect to the information, products, services, or related graphics contained in the document for any purpose. Any reliance placed on such information is therefore strictly at your own risk. ABB reserves the right to discontinue any product or service at any time.

Copyright © 2013 ABB. All rights reserved.

Dry-type transformers and reactors Safe, reliable and energy ...

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