GE Vernova provides cost effective solutions to facilitate the electric stress control of your equipment. Our bushings for electrical transmission offer AC and DC solutions with high-value customer benefits: longer lifetime and higher reliability, increased safety, minimal maintenance and installation flexibility.

Since 1923, GE Vernova's bushings have been synonymous with excellence, quality and competence in the high voltage field. GE Vernova has its manufacturing plant and center of competence and development in Sesto San Giovanni (Milan), Italy.

Motivated to provide you with innovative and superior quality products, our vision remains focused on meeting customer requirements while anticipating and exceeding the needs of a continuously changing market.

GE Vernova's solution advantages: RIP, OIP, Hybrid and now RIS Bushings for AC & DC Applications
  • NEW!  Fire-resistant, explosion-proof, and environmentally friendly Resin-Impregnated Synthetics (RIS) Bushings up to 420 kV for power transformers, interchangeable with our RIP bushings
  • NEW!  We are expanding our GRiDEA portfolio with POBR-g oil-to-SF6-free RIP bushings designed to decarbonize high-voltage grids. By enabling direct connections between power transformers and SF6-free GIS up to 420 kV, these bushings help lower the carbon footprint of the GIS and deliver superior LCA results
  • RIP - Resin Impregnated Paper up to 550 kV for power transformers
  • RIP - Resin Impregnated Paper up to 36 kV and 45 kA for generator
  • OIP - Oil Impregnated Paper for voltages up to 1200 kV for power transformers
  • SF₆ insulated up to 550 kV for GIS
  • HVDC – High Voltage Direct Current:
    • SF₆ insulated through-wall bushings and up to 800 kV
    • Hybrid SF₆  - OIP insulated transformer bushings up to 800 kV
    • Hybrid SF₆ - RIP insulated transformer bushings up to 550 kV
    • Solid core SF6-free bushings for converter transformers up to 550 kV, part of our GRiDEA portfolio of decarbonization solutions.

Bushings

GE Vernova provides cost effective solutions to facilitate the electric stress control of your equipment. Our bushings for electrical transmission offer AC and DC solutions with high-value customer benefits: longer lifetime and higher reliability, increased safety, minimal maintenance and installation flexibility.

Since 1923, GE Vernova's bushings have been synonymous with excellence, quality and competence in the high voltage field. GE Vernova has its manufacturing plant and center of competence and development in Sesto San Giovanni (Milan), Italy.

Motivated to provide you with innovative and superior quality products, our vision remains focused on meeting customer requirements while anticipating and exceeding the needs of a continuously changing market.

GE Vernova's solution advantages: RIP, OIP, Hybrid and now RIS Bushings for AC & DC Applications
  • NEW!  Fire-resistant, explosion-proof, and environmentally friendly Resin-Impregnated Synthetics (RIS) Bushings up to 420 kV for power transformers, interchangeable with our RIP bushings
  • NEW!  We are expanding our GRiDEA portfolio with POBR-g oil-to-SF6-free RIP bushings designed to decarbonize high-voltage grids. By enabling direct connections between power transformers and SF6-free GIS up to 420 kV, these bushings help lower the carbon footprint of the GIS and deliver superior LCA results
  • RIP - Resin Impregnated Paper up to 550 kV for power transformers
  • RIP - Resin Impregnated Paper up to 36 kV and 45 kA for generator
  • OIP - Oil Impregnated Paper for voltages up to 1200 kV for power transformers
  • SF₆ insulated up to 550 kV for GIS
  • HVDC – High Voltage Direct Current:
    • SF₆ insulated through-wall bushings and up to 800 kV
    • Hybrid SF₆  - OIP insulated transformer bushings up to 800 kV
    • Hybrid SF₆ - RIP insulated transformer bushings up to 550 kV
    • Solid core SF6-free bushings for converter transformers up to 550 kV, part of our GRiDEA portfolio of decarbonization solutions.

RIP bushings offer superior flexibility for all transformer types, simplifying transport, handling, storage, and installation. Designed for reliability, they can be mounted at any angle up to 45° and are seismically qualified according to IEC 61463 and IEEE 693-2018 standards. These compact, robust units are rated for alternating voltages up to 550 kV on power transformers and up to 36 kV/45 kA on generators.

RIS bushings offer exceptional versatility across all transformer types, simplifying transport, handling, storage, and installation. These bushings are immune to moisture absorption and feature a very low dissipation factor, ensuring long-term reliability. Furthermore, they support installation at any angle and are seismically tested in accordance with IEC 61463 and IEEE 693-2018 standards.

Backed by over a century of engineering expertise, our OIP bushings feature high-performance, capacitance-graded condenser cores with oil-impregnated paper. These bushings are designed to meet international standards (IEC 60137, IEEE C57.19.00, and IEEE C57.19.01) for alternating voltages above 1000 kV. Engineered for use in power transformers, they offer a compact, robust, and reliable design, supporting installation at inclinations of up to 45°.

The technology

RIP
Resin Impregnated Paper
  • AC & DC up to 550 kV
  • Power transformers (oil-to-air, oil-to-oil, oil-to-SF₆)
  • Direct connection between power transformers and GIS SF6 or alternative insulating gases
  • AC & DC through-wall applications
  • AC Generators
RIS
Resin Impregnated Synthetics 
  • Up to 420 kV
  • Power transformers (oil-to-air)
OIP
Oil Impregnated Paper
  • Up to 1200 kV
  • Power transformers (oil-to-air, oil-to-oil, oil-to-SF₆)
  • Through-wall applications
Hybrid
  • DC converter bushing up to 800 kVDC
  • Based on two technologies: OIP+SF₆ or RIP+SF₆
SF₆ insulated
  • Up to 800 kV
  • GIS, GIL and dead tank (air-to-SF₆)
  • Through-wall applications
  • Design parts patented
SF₆-free insulated
  • GIS, GIL

Power transformers bushings

OIP technology

Oil to air transformer bushings, for the connection to the HV transmission or distribution system

36-1200 kV52-170 kV25-765 kV
PNOPSOPAO

Oil to SF₆ for the connection to the SF₆ metal enclosed bus ducts

72,5-1050 kV
POBO

Oil to oil for the connection to the HV cables

72,5-1050 kV
PCTO
RIP technology

Resin Impregnated Paper transformer bushings

24-550 kV72,5-245 kV24-52 kV72,5-420 kV72,5-420 kV
PNR
Oil to air application
PCTR
Oil to oil application
PTFR/PTHR
Oil to air transformer bushings
POBR
Oil to SF₆ application
POBR-g
Oil to Alternative Gas application

Power Generator Bushings 

RIP technology

Generator High Current RIP bushing up to 30 kV-45 kA
PGFR 

Wall Bushings
Gas insulated technology air to air

up to 800 kV AC & DC applications 

PWS (AC solution) and PWHS (DC solution)

OIP Technology

Up to 420 kV - PWO

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DC converters bushings

Hybrid technology for DC converter bushings (OIP + SF₆ up to 1,100 kV; RIP + SF₆ above 420 kV)

PHI

GIS bushings

Up to 550 kV

PABS

Grid’s Resin Impregnated Paper (RIP) bushing passes an impressive internal arc test

In October 2013, an internal arc test was performed on a 420 kV RIP transformer bushing, type PNR 420 kV 1250A, in ZKU independent high voltage and high power test laboratory in Prague, Czech Republic.

The main aims of this test were to demonstrate the RIP bushing’s explosion proof capabilities, and to check its safety in the case of very dangerous events following an internal severe electrical fault.

To demonstrate this, a 420 kV normal production bushing was subject to an internal arc test with a short circuit current of 63 kA applied for 0.5 s. Safety is demonstrated if no parts are projected outside a circular safety area of 3 m radius around the bushing, and if no explosive events occur in the air side, i.e. the top part, of the bushing.

This video shows the effect of the simulated fault. The value of the measured injected energy during this test is impressive. The energy amounted to 13 MJ, which is equivalent to a 1000kg mass launched at a speed of 580 km/h or 360 mph!

This test, typical for other components such as instrument transformers, is a first for transformer bushings. In 2011 GE VERNOVA Grid was the first in the world to perform such an internal arc test on a 420 kV bushing based on the traditional oil-impregnated-paper technology and now it has repeated this success on the new 420 kV bushing, based on RIP technology.

Grid R&D teams have successfully tested our 820 kV/4500 A Bushings for HVDC converters, placing us as one of only three players to manufacture this technology. The bushings were designed in Milano, Italy and have now been fully type-tested and successfully completed their temperature rise tests over the rated current limit to confirm their suitability to meet all requirements.