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Automatic disconnection cannot be achieved in the time required

I was reading art. 411.3.2.6 of BS 7671...

I'm wondering: except for the case where Zs is too high (caused by the length of the circuit, together with the CSA), are there other situations where automatic disconnection times cannot be achieved ?

Maybe some special types of loads or circuits ?
Parents
  • Yes ... for example where only inverters are supplying loads.
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  • Yes ... for example where only inverters are supplying loads.
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