Cost effective solutions to facilitate the electric stress control of your equipment. Our bushings provide long life and high reliability.
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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, no 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.
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, no 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.
The technology
- GE Vernova's hybrid HVDC converter bushing is based on two technologies: oil impregnated paper (OIP) for the grading capacitor that interfaces with the transformer and SF6 gas with a special composite insulator for the air side.
- This hybrid technology complies with the strong request of the DC market to have dry type bushings and avoid the risk of oil spill inside the valve room. It is secured, reliable and safe and efficient.
| R.I.P Resin Impregnated Paper |
|
| O.I.P Oil Impregnated Paper |
|
| Hybrid |
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| SF₆ insulated |
|
Power Transformers Bushings
OIP technology
Oil to air transformer bushings, for the connection to the HV transmission or distribution system
| 36-1200 kV | 52-170 kV | 25-765 kV |
| PNO | PSO | PAO |
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 kV | 72,5-245 kV | 24-52 kV | 72,5-420 kV |
| PNR Oil to air application | PCTR Oil to oil application | PTFR/PTHR Oil to air transformer bushings | POBR Oil to SF₆ application |
Power Generator Bushings
RIP technology
Generator High Current RIP bushing up to 30 kV-45000 A
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.
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