Answer / ranveer

Dear fren i think your Isd is very much high or it may
highest in. kindly che it out and may consult your vendor

Answer / mukesh khatri

check the terminationa and lugs

Answer / abdul

HI Friend,
I think there must be a earth leakage in your receiving end.
Always the MCB trips for Short circit,where as the MCCB
trips for both earth leakage & short circuit.

Answer / kyle

Hi,

Is it instantaneous tripping? If it is, Isd might be too low
(in fact it is consider high in this case) and tsd might be
too short, need to check the downstream loads.

might to provide more info?

Answer / naveen sahariya

This may be due to absense of discrimination feature in
DB.or cascading is not as per requirement.better to have a
word with siemens engineer

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