Answer / s c budhiraja

No, it is of no use to connect more than one rccb of the
same rating in series for a three phase equipment.It is
only waste of money.

Answer / electrobot of the philippines

why you need to connect series of RCCB's by the way?? its a
stupid act.

Answer / k.suresh

it leads more maintenance and more work during
fault.also,series connection will not give additional
protection and some time we may face neusence tripping.

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