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GSB is a dry resin-impregnated transformer bushing for oil-air applications and is available in 245 to 800 kV voltages.​

The GSB can be installed at any angle from horizontal to vertical and is equipped with a 2 or 20-kV test tap. The conductor arrangement is of the draw rod or draw lead type.​

  • Our unique draw rod system facilitates easy field installation and removal without lowering the oil level.​
  • The bushing is free from partial discharges and has a very low dissipation factor, which results in a lifetime equal to that of the transformer.​
  • The insulator sheds are made from high-temperature vulcanization (HTV) silicone for unsurpassed erosion resistance.​
  • 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: 245 - 800 kV​
  • Current: ≤ 2500 A. Higher current ratings on request.
  • Technology: Resin-impregnated paper (RIP) with silicone or porcelain insulator​

Get to know more

Document title ID
Product information  
Technical guide 1ZSC000563-AAC
Technical guide GSB 800 1ZSC000563-ABA
Installation and maintenance guide 1ZSC000563-AAD
Installation and maintenance guide GSB 800 1ZSC000563-ABB
General information  
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)

Type designation Insulator Lightning impulse (kV) Rated current (A) Space for current transformer (m) Bushing Link to document
GSB 245/2000/0.3 Brown porcelain 1050 2000 0.3 1ZSC901245-AAA
1ZSC901245-ABA
2751 377-1
Grey porcelain 1ZSC901245-BAA
1ZSC901245-BBA
Composite 1ZSC901245-CAA
1ZSC901245-CBA
2751 377-9
GSB 245/2000/0.6 Brown porcelain 1050 2000 0.6 1ZSC901245-AAB
1ZSC901245-ABB
2751 377-2
Grey porcelain 1ZSC901245-BAB
1ZSC901245-BBB
Composite 1ZSC901245-CAB
1ZSC901245-CBB
2751 377-10
GSB 245/3150/0.3 Cu Brown porcelain 1050 3150 0.3 1ZSC901245-ACA
1ZSC901245-ADA
2751 377-36
Grey porcelain 1ZSC901245-BCA
1ZSC901245-BDA
Composite
1ZSC901245-CCA
1ZSC901245-CDA
2751 377-29
GSB 245/3150/0.6 Cu Brown porcelain 1050 3150 0.6 1ZSC901245-ACB
1ZSC901245-ADB
2751 377-37
Grey porcelain 1ZSC901245-BCB
1ZSC901245-BDB
Composite 1ZSC901245-CCB
1ZSC901245-CDB
2751 377-22
GSB 362/1600/0.3 Brown porcelain 1175 1600 0.3 1ZSC901362-AAA
1ZSC901362-ABA
2751 377-3
Grey porcelain 1ZSC901362-BAA
1ZSC901362-BBA
Composite 1ZSC901362-CAA
1ZSC901362-CBA
2751 377-11
GSB 362/1600/0.6 Brown porcelain 1175 1600 0.6 1ZSC901362-AAB
1ZSC901362-ABB
2751 377-4
Grey porcelain 1ZSC901362-BAB
1ZSC901362-BBB
Composite 1ZSC901362-CAB
1ZSC901362-CBB
2751 377-12
GSB 362/3150/0.3 Cu Brown porcelain 1175 3150 0.3 1ZSC901362-ACA
1ZSC901362-ADA
2751 377-38
Grey porcelain 1ZSC901362-BCA
1ZSC901362-BDA
Composite 1ZSC901362-CCA
1ZSC901362-CDA
2751 377-31
GSB 362/3150/0.6 Cu Brown porcelain 1175 3150 0.6 1ZSC901362-ACB
1ZSC901362-ADB
2751 377-39
Grey porcelain 1ZSC901362-BCB
1ZSC901362-BDB
Composite 1ZSC901362-CCB
1ZSC901362-CDB
2751 377-32
GSB 420/1600/0.3 Brown porcelain 1550 1600 0.3 1ZSC901420-AAA
1ZSC901420-ABA
2751 377-5
Grey porcelain 1ZSC901420-BAA
1ZSC901420-BBA
Composite 1ZSC901420-CAA
1ZSC901420-CBA
2751 377-13
GSB 420/1600/0.6 Brown porcelain 1550 1600 0.6 1ZSC901420-AAB
1ZSC901420-ABB
2751 377-6
Grey porcelain 1ZSC901420-BAB
1ZSC901420-BBB
Composite 1ZSC901420-CAB
1ZSC901420-CBB
2751 377-14
GSB 420/2500/0.3 Cu Composite 1550 2500 0.3
1ZSC901420-CCA
1ZSC901420-CDA
2751 377-33
GSB 420/2500/0.6 Cu Composite 1550 2500 0.6 1ZSC901420-CCB
1ZSC901420-CDB
2751 377-34
GSB 550/1600/0.3 Brown porcelain 1675/1800 1600 0.3 1ZSC901550-AAA
1ZSC901550-ABA
1ZSC901550-DAA
1ZSC901550-DBA
2751 377-7
Grey porcelain 1ZSC901550-BAA
1ZSC901550-BBA
1ZSC901550-EAA
1ZSC901550-EBA
Composite 1ZSC901550-CAA
1ZSC901550-CBA
1ZSC901550-FAA
1ZSC901550-FBA
2751 377-15
GSB 550/1600/0.6 Brown porcelain 1675/1800 1600 0.6 1ZSC901550-AAB
1ZSC901550-ABB
1ZSC901550-DAB
1ZSC901550-DBB
2751 377-8
Grey porcelain 1ZSC901550-BAB
1ZSC901550-BBB
1ZSC901550-EAB
1ZSC901550-EBB
Composite 1ZSC901550-CAB
1ZSC901550-CBB
1ZSC901550-FAB
1ZSC901550-FBB
2751 377-16
GSB 550/2500/0.3 Cu Composite 1675/1800 2500 0.3 1ZSC901550-CCA
1ZSC901550-CDA
2751 377-35
GSB 550/2500/0.6 Cu Composite 1675/1800 2500 0.6 1ZSC901550-CCB
1ZSC901550-CDB
2751 377-20

Movie title ID
Bushings type GSB: Product highlights 1ZSC000717-ACB
Earthquake resilience: The value of experience 1ZSC000717-ACE