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The circuit breaker has double break contacts, the contacts being of spring loaded multifinger type engaging with a moving crossbar and giving high pressure line contact.
The trip free operating mechanism is self contained and all working parts are adequately electroplated. Gaskets are provided to prevent oil throw and to seal off dirt and dust.
Mechanical ON/OFF indication of the breaker is provided and connections are available for electrical indication.
All circuit breakers of the same rating are interchangeable.
Isolating contacts
The main isolating finger contacts are of the self aligning multiple plugand-socket type with silver to silver contact faces, and designed to ensure high-pressure multi-line contacts; they are mounted on robust insulation bases. Secondary isolating plugs and sockets which are spring mounted to ensure self-alignment are provided for auxiliary and control circuit connections.
Interlocks
A system of mechanical interlocks ensures that it is not possible to make or break the load on the isolating contacts or remove the breaker tank and top plate while the circuit breaker is ON.
Trip Coils
Any combination of over current, earth fault, under voltage and shunt trip coils, upto a maximum of four, can be incorporated.
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