new single phase 2.2kw motor tripping mcb
new single phase 2.2kw motor tripping mcb
(OP)
hi i have a single phase 2.2 kw motor with start run capacitors. we have just replaced this motor as the centrifugal switch was u/s on the old one. power is supplied to the motor through 2 contactors which are also new, and the 16A motor rated mcb has also been changed but the mcb still trips occasionaly, further back on the incoming supply there is a 32A mcb that i dont think is motor rated but does not seem to trip as often as the 16A "c" rated one
any ideas?? im pulling my hair out here!!! many thanks in advance!!
any ideas?? im pulling my hair out here!!! many thanks in advance!!





RE: new single phase 2.2kw motor tripping mcb
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If we learn from our mistakes I'm getting a great education!
RE: new single phase 2.2kw motor tripping mcb
RE: new single phase 2.2kw motor tripping mcb
Check your fault clearance times are still ok, although if this is a fixed installation rather than a socket outlet you'll almost certainly be ok.
Are you UK-based?
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If we learn from our mistakes I'm getting a great education!
RE: new single phase 2.2kw motor tripping mcb
Here in NZ (and in Australia too) you would use a 16A or 20A D-Curve MCB to protect the feeder cable (16A if you used 1.5mm2 feeder cable, 20A if you used 2.5mm2), but a D-curve would be the norm for a motor circuit.
RE: new single phase 2.2kw motor tripping mcb
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If we learn from our mistakes I'm getting a great education!