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Private Bag X2016, Isando 1600
1 Tripswitch Drive, Elandsfontein, Gauteng, 1401
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sales@cbi-electric.com.au  (Australia)

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Circuit Breaker

Will the breaker trip, even if the handle is blocked?

YES, absolutely it cannot be restrained from tripping if required as a safety measure!

Even with the handle held in the ON position, the breaker will trip if an overcurrent / overload trip occurs, safely disconnecting the load.


What is the Mid Trip feature?


The handle of the circuit breaker is able to visually indicate whether it was tripped by an electrical fault. The handle stops in an intermediate position, between on and off when it was tripped by an electrical fault.

The difference between an auxiliary switch and an alarm switch?

An auxiliary switch generates a signal that indicates whether the circuit breaker is on or off, but cannot distinguish between whether it has been manually switched off or tripped by an electrical fault. An alarm switch generates a signal that indicates whether the circuit breaker was tripped by an electrical fault, but not whether the breaker is off or turned on manually.

Is the breaker always tripped at the stated rated current?

Yes, as the mechanism is temperature-independent, high or low ambient temperature is not a factor. But, for example at -40 degrees the action of the breaker will be somewhat more sluggish and at +85 degrees it will be more rapid. But it will always keep to the stated rated current.

What are the benefits of hydraulic-magnetic technology?


A circuit breaker transforms a change in an electric current to a mechanical movement that interrupts the circuit. A thermal circuit breaker does this through a bimetal element that heats up and bends. Therefore, heat trips the circuit breaker.