VS1 Series Vacuum Circuit Breaker 12KV 630-1250A

Voltage: 12KV

Current: 630-1250A

Breaking current: 20KA

Type: withdrawable

Product overview

VS1-Series embedded pole. vacuum circuit breakers are applicable to 12kV, three-phase AC 50Hz indoor switchgear and can serve as protection and control units for industrial and mining establishment transformer substation equipment. With modular and independent-frame design for their spring operating mechanisms, VS1-Series circuit breakers can operate with KYN28-12(24) mid-set and fixed switchgear. These circuit breakers are subject to both fixed installation and assembly with the truck as a handcart unit

Applicable standards

1EC62271-100 High-voltage switchgear and control-gear-Part 100: Alternating-current circuit-breakers

Secondary circuit

VS1-Series vacuum circuit breakers adopt modular designs for their secondary control circuit boards. The electric connection of the mechanisms employs high-grade self-fastener plugs, which both facilitates replacement and ensures reliable electrical connection

High-performance oil buffer

High-performance breaking buffer can markedly reduce the overshoot and rebounding amplitudes of the moving contact of a vacuum circuit breaker in breaking thus avoiding the loss of mechanical endurance due to partial over fatigue of vacuum interrupter bellows resulting from moving contact overshoot. As the rebounding amplitudes of the moving contact reduces, No re-ignition and restrike is found during the switching capacitor bank test

Technical Parameters

Operation safety

With anti-maloperation locking protection these circuit breakers, working in switchgear cabinets, can realize "five-protection" interlocking functions, avoiding malapert and maximizing the protection of an operator's personal safety.

Only when the circuit breaker and earthing switch are in the disconnected position can the truck of circuit breaker be racked to the service position from the test position

The circuit breaker can be closed only when in the service/test position.

With the circuit breaker closed its truck cannot be racked in or racked out which can be realized only when the circuit breaker is in the disconnected position.

The circuit breaker in a closed position cannot be racked out from the service position to the test position.

The circuit breaker cannot be closed while it is being racked in.

When the circuit breaker is closed, if the closing signal fails to be removed timely, the internal anti-trip control circuit will cut off the closing circuit to prevent multiple reclosing (optional).

If the electric closing lockout is selected, the circuit breaker will be unable to be closed when the secondary circuit fails to provide power or the power provided fails to meet the normal operation of the locking electromagnet(optional).