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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.​
 

  • The GSA bushing is partially discharge-free and has a very low dissipation factor, which results in a lifetime equal to that of the transformer.​
  • The 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.​
  • The GSA bushing has an excellent performance in seismic active areas.​
  • A comprehensive testing program has been performed in addition to what international standards require.​
  • It is possible to use alternative insulating fluids.​

Product scope​:

  • Voltage: 52 - 245 kV​
  • Current: ≤ 2000 A. Higher current ratings on request.​
  • Technology: Resin-impregnated paper (RIP) with silicone insulator

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
Resin impregnated paper bushings 2750 515-130
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