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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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  • 0
    Zoomup:
     consider the need to instant trip a C type 63A unit - if it does not trip the rest of the morning may be lost to getting the company fuse changed.


     


    A rare beast in the domestic world I feel. And even in shops and offices.


    Z.




    Possibly a C63 is an extreme example (but not unknown for say submains to remote CUs) - but even a relatively common B50 would need 250A to test for instantaneous operation - which won't to the DNO's fuse much good if it persists for long.


       - Andy.


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  • 0
    Zoomup:
     consider the need to instant trip a C type 63A unit - if it does not trip the rest of the morning may be lost to getting the company fuse changed.


     


    A rare beast in the domestic world I feel. And even in shops and offices.


    Z.




    Possibly a C63 is an extreme example (but not unknown for say submains to remote CUs) - but even a relatively common B50 would need 250A to test for instantaneous operation - which won't to the DNO's fuse much good if it persists for long.


       - Andy.


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