Transformator Business Unit

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Transformator BU

Introduction

The Power Transformer factory’s history dates back more than 130 years as the first transformer in the work was built by GANZ in 1885, the factory is strategically located in the town of Tapioszele, 80 kms from the capital city of Budapest. The Power Transformer division specializes in the design, manufacture and testing of substation transformers, generation transformers, auxiliary transformers, mobile transformers and traction transformers from 20 to 600 MVA (1000 MVA for autotransformers) from 52 to 800 kV.

Transformator BU

Strategy

 

With more than 130 years’ experience in tailor made transformers CG Hungary, formerly known as GANZ, is the partner to find the right solutions for your challenges:

  • CG Hungary is specialized in special transformer application, and tailor made designs.
  • CG Hungary is market leader in the manufacturing of Biofluid immersed power transformers, which provide safe solutions for special requirements of fire protection, environmental safety, space limitations and cost savings.
  • CG Hungary has produced transformers with very low noise requirements, fulfilling successful the most extreme requirements of German and Scandinavian markets.
  • CG Hungary has an excellent record for short-circuit tests with one of the highest reliability numbers since 1987, proving our design and manufacturing rules.

Transformator BU

From the beginning to the present

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1885 Patent of closed magnetic circuit transformer  
1950 First transformer on 245 kV
1967 First transformer on 420 kV
1978 First transformer on 750 kV
2002 First transformer in the world for 123 kV with ester liquid
2008 Beginning of manufacturing mobile transformers
2008-2013 Factory development:
Dust-free, air conditioned winding workshop
Test bay upgared to 800 kV transformers
2009-2011 765 kV transformer export to Indian market
2015 Transformers for oil and gas projects
2015 Largest unit (250 MVA, 420 kV) tested for shortcircuit withstand at KEMA
2019 Refurbishment of our 40 years old 750 kV transformers

Transformator BU

Manufacturing limits

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Production range: 20-600 MVA

Voltage:  72,5-800 kV

Frequency:   16,7-60Hz

Annual capacity:  10 000 MVA

 

Equipment limits:

Core Stacking:  200 t

Winding  :

  dia.:
        3000 mm

  height:    3000 mm

  weight:    20 t

Crane capacity:  240 t

(limit for active part only)

Workflow

From design to energization

 

Design characteristics

Our designers are familiar with all international and national standards. Every transformer is individually designed to its specific requirements.

We use commercial and developed software during the design process to increase product reliability for the following analysis:

- loss and noise calculation,

- voltage distribution calculation and FEM electrical field analysis,

- short-circuit resistance calculation,

- eddy current loss and heat calculation,

- earthquake resistance calculations.

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Factory

  • Up-to-date manufacturing facilities
  • Separated workplaces according workflow

  • Winding workshop:
    • dust proof covering
    • air conditioning
    • slight overpressure

  • Inspection point before drying
  • Computer controlled, full parameter driven process optimization:
  • Temperature, Vacuum, Water extraction

Test bay

      Two busbars for supply
      3 transformers at the same time

  • Impulse voltage test

    • 2 400 kV

    Separate source voltage test

    • 700 kV/350 kVA
    • 350 kV/175 kVA
    • 60/30/10 kV/1300 kVA
    • Supplied from motor-generator groups

    Induced voltage test

    • max. 170 Hz
    • max. 66 kV supply
    • Back ground PD level: < 15 pC

    Short circuit and heat run tests

    • max. 200 MVAr

     

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Erection – Energization

Own service team

95% of our transformers are assembled by ourselves

Site testing and as if needed site trainings for the operating personnel

From 1990 to the present

Reference

42524 MVA total

News

Actualities

You can find our current news on our LinkedIn page !

Fisher Street

UKPN, London, Anglia

  • 3 x 33 MVA
  • 132 / 11 kV
  • Three water cooled power transformer in the inner city of London
  • Special transformer design for the limited space inside the building
  • On the transformers oil-water heat exchangers are installed and the water-air heat exchangers are on the top of the building

EDF Hydro Brommat, France

UKPN, London, Anglia

  • 45 MVA
  • 240/15kV
  • Transformer for Hydro Power Plant
  • Refurbishment of an old HPP with limited space for the new transformer

Hofor Project Kopenhagen, Denmark

  • Biomass power plant 4 transformers
  • 55 MVA 132 kV / 10,4 kV
  • 31,5 MVA 10,4 kV / 6,3 kV
  • 200 MVA 135 kV ± 4 x 1,25% / 15 kV
  • 35 MVA 15 kV / 10,4 kV
  • Limited space in the harbour biomass plant extension
  • Water cooling system for all four transformers

Göteborg Energi Nät

  • 5 db 40 MVA
  • 135 / 10,3 kV
  • The transformers are operationg 25-30 meters below ground level
  • Eco friendly, ester filled power transformers
  • The cooling of the units are below the tranfsormers in another level

Have a question?

Contact

Jan Prins

Head of Sales and Power Transformer BU

Mihály Baka

Sales - Hungary

Lajos Harai

Sales - Romania / Ukraine

Gergely Szűcs

Sales - North / West Europe

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phone: +36 1 478 6701

jan.prins@cgglobal.com

phone: +36 30 3048587

mihaly.baka@cgglobal.com

phone: +36 30 2697423

lajos.harai@cgglobal.com

phone: +36 1 483 6783

gergely.szucs@cgglobal.com

Jan Prins

Head of Sales and Power Transformer BU

phone: +36 1 478 6701

jan.prins@cgglobal.com

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Mihály Baka

Sales - Hungary

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phone: +36 30 3048587

mihaly.baka@cgglobal.com

Lajos Harai

Sales - Romania / Ukraine

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phone: +36 30 2697423

lajos.harai@cgglobal.com

Gergely Szűcs

Sales - North / West Europe

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phone: +36 1 483 6783

gergely.szucs@cgglobal.com