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AC bushings type GSA-OA

GSA-OA is a dry resin impregnated transformer bushing for oil-air applications and is available for voltages from 52 to 245 kV. Current ratings are available from 1,250 to 2,000 A.

The GSA bushing can be installed at any angle from horizontal to vertical, and is equipped with a 2 kV test tap. Conductor arrangement can be either of draw lead or solid rod type.

Product scope

  • Voltage: 52 - 245 kV
  • Current: ≤ 2,000 A. Higher current ratings on request.
  • Technology: Resin impregnated paper (RIP) with silicone insulator

Why Hitachi ABB Power Grids?

  • The bushing is partial discharge free and has a very low dissipation factor, which results in a lifetime equal to that of the transformer.
  • Unique sealing system RIPCOAT drastically reduces the risk of moisture ingress during handling.
  • The insulator sheds are made from high temperature vulcanization (HTV) silicone for unsurpassed erosion resistance.
  • Excellent performance in seismic active areas.
  • A very comprehensive testing programme has been performed in addition to what is required by international standards.
  • Possible to use with alternative insulating fluids.
AC bushings type GSA-OA

Get to know more

Catalogs and instructions  
Benefits of using the GSA bushing 1ZSE 2750-117
Technical guide 1ZSE 2750-111
Installation and maintenance guide 2750 515-115

General information, resin impregnated bushings  
Ordering data form (.doc format)
Please note that this is an interactive form, which can be filled in, saved and sent to us by e-mail.
1ZSC 2750-119
Bushing diagnosis and conditioning 2750 515-142
Different insulation systems in condenser bushings 2750 515-143
Electrical routine testing of high voltage bushings 2750 515-148
Resin impregnated paper bushings 2750 515-130
Seismic calculations on ABB bushings mounted on a transformer tank cover 2750 515-88
Temperature dependency for C1 and tan d for resin impregnated paper bushings 2750 515-134
Comparison between porcelain and silicone rubber for use as outdoor insulation on high voltage bushings 2750 515-136
Silicone rubber 2750 515-131

Pro/E models
Pro/E models (compressed zip file)

Dimension drawings          
Type designation Lightning impulse
(kV)
Rated current
(A)
Space for current transformer
(m)
Bushing Drawing
GSA 52-OA/2000/0 250 2000 0 LF 130 052-BA 2751 362-ABA
GSA 52-OA/2000/0.3     0.3 LF 130 052-BB 2751 362-ABB
GSA 52-OA/2000/0.5     0.5 LF 130 052-BC 2751 362-ABC
GSA 73-OA/2000/0 350 2000 0 LF 130 073-BA 2751 362-BBA
GSA 73-OA/2000/0.3     0.3 LF 130 073-BB 2751 362-BBB
GSA 73-OA/2000/0.5
    0.5 LF 130 073-BC 2751 362-BBC
GSA 100-OA/1600/0 450 1600 0 LF 130 100-BA 2751 362-CBA
GSA 100-OA/1600/0.3
    0.3 LF 130 100-BB 2751 362-CBB
GSA 100-OA/1600/0.5     0.5 LF 130 100-BC 2751 362-CBC
GSA 123-OA/1600/0 550 1600 0 LF 130 123-BA 2751 362-DBA
GSA 123-OA/1600/0.3     0.3 LF 130 123-BB 2751 362-DBB
GSA 123-OA/1600/0.5     0.5 LF 130 123-BC 2751 362-DBC
GSA 145-OA/1600/0 650 1600 0 LF 130 145-BA 2751 362-EBA
GSA 145-OA/1600/0.3     0.3 LF 130 145-BB 2751 362-EBB
GSA 145-OA/1600/0.5     0.5 LF 130 145-BC 2751 362-EBC
GSA 170-OA/1600/0 750 1600 0 LF 130 170-BA 2751 362-FBA
GSA 170-OA/1600/0.3     0.3 LF 130 170-BB 2751 362-FBB
GSA 170-OA/1600/0.5     0.5 LF 130 170-BC 2751 362-FBC
GSA 245-OA/1600/0.3 1050 1600 0.3 LF 130 245-BB 2751 362-GBB
GSA 245-OA/1600/0.6     0.6 LF 130 245-BD 2751 362-GBD
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