Home >> CTSS Products >> Power Transmission >> Air insulated switchgear(AIS)
126kV Gas Insulated Circuit Breaker(SF6)CB
126kV Gas Insulated Circuit Breaker(SF6)CB Product Details:
126kV Gas Insulated Circuit Breaker(SF6)CB
General:
Circuit breaker (CB) has been around for almost as long as industrial electrical power usage. They react automatically to fluctuations in electrical current, and trip to protect a circuit from damage from overloading or short circuiting. Modern SF6 type circuit breakers use compressed gas to interrupt current flow and are common in electrical power substations.
Current interruption in a high-voltage circuit-breaker is obtained by separating two contacts in a medium, such as sulfur hexafluoride (SF6), having excellent dielectric and arc-quenching properties. After contact separation, current is carried through an arc and is interrupted when this arc is cooled by a gas blast of sufficient intensity.
Standards:
IEC-60056 High Voltage Alternating Current Circuit-Breakers
GB1984-2003 High Voltage Alternating Current Circuit-Breakers
Features:
Ø Compact and simple construction
Ø Low operation noise
Ø High reliability
Ø No leakage, operator and environment friendly design.
Ø Easy erection & free maintenance
Application: It is suitable for control and protection of electrical power system, and can also be used as interconnected circuit breaker.
Typical specification:
Ø Type: SF6 Circuit Breaker
Ø Highest system voltage: 126kV
Ø Rated frequency: 50Hz
Ø Rated current: 3150, 2500,
Ø Rated short circuit breaking current: 40,31.5 KA
Ø Rated short circuit making current (peak): 100,80KA
Ø Rated short time withstand current : 40,31.5 KA
Ø Rated peak withstand current(peak) : 100,80KA
Ø First pole to clear factor: 1.5,
Ø Rated operating sequence: 0-0.3s-CO-180s-CO
Ø SF6 rated pressure: 0.5MPa
Ø SF6 annual gas leakage ratio: ≤0.5%
Ø Gas weight: 12KG
Ø Product weight: 2000KG
CTSS catalogue is available as per request.