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Pedantic semantics for earth fault

Stephen Biddle
Hi All



I'm reviewing some of our documentation and it says "a 30 mA earth leakage circuit breaker" should be used.



Earth leakage breakers as such are no longer used, having been replaced with residual current devices.  What wording do you think I should use?  It seems to me that the fault to be detected is still "earth leakage" even if the device uses "residual current" as the detection method.  So would I be correct to say "earth leakage fault protection, at a level of 30 mA"?



Thanks



Stephen
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    Have a look at BS7671, 411.3.3 and 415.1, it states:



    "..residual operating current not exceeding 30mA and an operating time not exceeding 40ms at a residual current of 5* operating current."



    They seem to refer to it as residual current rather than earth leakage current now although that is where any loss of current is likely to have gone. 



    Rob
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  • 0
    Have a look at BS7671, 411.3.3 and 415.1, it states:



    "..residual operating current not exceeding 30mA and an operating time not exceeding 40ms at a residual current of 5* operating current."



    They seem to refer to it as residual current rather than earth leakage current now although that is where any loss of current is likely to have gone. 



    Rob
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