Circuit Breaker Retrofit
For Gas-Insulated Substation
GE’s GIS retrofit solutions are designed to replace aging or obsolete circuit breakers manufactured by GE or a 3rd party with a new GE circuit breaker that includes the pure spring mechanism.
The GIS retrofit solution is a cost effective and reliable method to modernize and extend the lifetime of the substation by gaining all the advantages of implementing new reliable technology.
The solution is suitable to replace vertical or horizontal GIS circuit breakers.
The turnkey service solution includes:
GE’s solution is designed for 72.5-145 kV and 300 kV-420 kV gas-insulated substations, regardless of the manufacturer or the application. To match the existing configuration and dimensions, phase-distance can be adapted with the interface and the 420 kV circuit breaker can be installed in U or Z configuration.
Vertical Circuit Breaker with Pure Spring Mechanism
The vertical circuit breakers proposed to retrofit the gas-insulated substation are equipped with the pure spring mechanism used in all GE HV circuit breakers. This proven technology enables minimized maintenance and improved reliability. Key features include:
Safe and Eco-friendly
Cost Effective Solution
Vertical Circuit Breaker Specifications
|Breaker Type||145 kV Vertical||420 kV Vertical|
|Reference electro-technical standards||IEC/IEEE|
|Rated voltage||145 kV||420 kV|
|Rated frequency||50/ 60 Hz|
|Short-duration power-frequency, phase-to-earth/across isolation distance||275 kV /315kV||520/610 kV|
|Lightning impulse phase-to-earth/across isolation distance||650 kVp / 750 kVp||1425/1425 (+240) kVp|
|Rated current||up to 3150 A||up to 5000 A|
|Rated peak withstand current||100 kAp / 108 kAp||170 kAp|
|Rated short-time current||40/3 kA/s||63/3 kA/s|
|Rated short circuit breaking current||40 kA||63 kA|
|SF6 weight / pole||5.4 kg||50 / 60 kg|
|Operating sequence||O – 0.3s – CO – 3 min – CO
CO – 15s - CO
|Min. gas operating pressure at 20°C (50Hz)||5.5 bar||5.5 bar|
|Circuit breaker approx. weight||1500 kg||4230 kg|