220kV Gas Insulated Circuit Breaker(SF6)CB

220kV Gas Insulated Circuit Breaker(SF6)CB Product Details：

220kV 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: 252kV

Ø   Rated frequency: 50Hz

Ø   Rated current: 2500,3150,4000A

Ø   Rated short circuit breaking current: 40,50KA

Ø   Rated short circuit making current (peak):100,125KA

Ø   Rated short time withstand current (4s):40,50KA

Ø   Rated peak withstand current(peak) :100,125KA

Ø   First pole to clear factor: 1.5, 1.3

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: 30KG

Ø   Product weight: 3500KG

CTSS catalogue is available as per request.

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