Answer / jun

It is done to limit output voltage during fault or
malfunction for safety reason. At normal condition this
earth connection don't have any function, it is useful only
during the above-stated condition.

In our plant we have installed new MCC with ELR and CBCT which is detecting some leakage current in the system but it leading to some confusion when to check that in which feeder which is drawing current we put off the whole panel itself but still CBCT detecting some leakage current so can anybody ans me , where i am going wrong or how to detect whether its actual leakage or CBCT malfunctioning.

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