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Fake circuit breakers

broadgage
Seem to be on the increase.

Makes me wonder if we should be testing samples before installation ?

A full and proper test requires relatively elaborate lab facilities, but perhaps a crude test involving say a vehicle battery and a 100 amp fuse.

This wont reveal all faults, but would at least weed out the most blatant "no trip" types.

An MCB tested thus might of course have been damaged, so perhaps test the odd sample and only install untested examples from the same batch. Rather expensive though.
youtube. fake MCB dismantled
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    I doubt that a car battery could deliver  6KA. The maximum cranking amps are often in the region of 200 amps to 300 amps, at which current the voltage drops by at least 10%, that in turn suggests a maximum short circuit current of very roughly 2KA to 3KA.


    12 volts DC can not maintain an arc, the minimum is about 18 volts.


    So testing with a car battery is rather basic, but would weed out the worst examples
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    I doubt that a car battery could deliver  6KA. The maximum cranking amps are often in the region of 200 amps to 300 amps, at which current the voltage drops by at least 10%, that in turn suggests a maximum short circuit current of very roughly 2KA to 3KA.


    12 volts DC can not maintain an arc, the minimum is about 18 volts.


    So testing with a car battery is rather basic, but would weed out the worst examples
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