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Sophisticated and advanced Vacuum Circuit Breaker
Compliant Standards: IEC 60077
VACUUM CIRCUIT BREAKER
for Electric Locomotives, EMUs and Metro Cars
Technical Features
- Single pole AC circuit breaker.
- Equipped with single bottle vacuum interrupter.
- Pneumatic closing and holding, opening through spring induced force.
- Earthing switch can be engaged directly on the breaker.
- Constructed for roof mounting.
- Requires less space for installation.
- Requires minimum maintenance.
- Provides protection against fault currents.
- Disconnect the traction vehicle from the overhead catenary wire.
Applications
The VCBA type circuit breaker is used as a main line circuit breaker:
- Used to close and open the power circuit of the vehicle from the overhead catenary.
- To interrupt the power circuit under overload, short circuit or any other defined conditions.
Technical Specifications
| Maximum rated voltage | 30 kV |
|---|---|
| Nominal line supply voltage | 25 kV |
| Rated power frequency withstand voltage | 75 kV rms |
| Rated impulse withstand voltage | 175 kV rms |
| Conventional thermal current in free air | 1000 A rms |
| Rated operational frequency | 50 Hz |
| Short circuit rupturing capacity | 16 kA rms (440 MVA) |
| Rated short circuit making current | 40 kA peak |
| Short time current capacity | 16 kA rms (3 sec) |
| Opening time | ≤ 60 ms |
| Closing time | < 100 ms |
| Control voltage | 110 V DC |
| Auxiliary contacts (Type & No.) | 8 Nos. (Fish Bone Type) configurable contacts for external circuit & 1 NO for internal use |
| Input air supply pressure | 5 to 10 kg/cm2 |
| Approx. weight | 150 kgs |