capacitor bank fusing
capacitor bank fusing
(OP)
CAN ANYBODY HELP ME CALCULATE THE FUSE RATING FOR THESE PARAMETERS
INCOMING VOLTAGE=11KV
CAPACITOR BANK RATING= 200KVAR
KINDLY PROVIDE FORMULA USED.thanks
INCOMING VOLTAGE=11KV
CAPACITOR BANK RATING= 200KVAR
KINDLY PROVIDE FORMULA USED.thanks






RE: capacitor bank fusing
Comparison example;- Canadian Electrical code.
Motors conductor ampacity> 100% plus 25% of largest motor.
Transformer conductor ampacity> 100% plus 25% of largest motor.
Capacitor conductor ampacity > 135% (CEC Rule 26-208,(1))
Bill
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"Why not the best?"
Jimmy Carter
RE: capacitor bank fusing
RE: capacitor bank fusing
Var_3Ph=200kVar
Icap=200/(1.732*11)=10.5A
As per IEEE 1036-1992, Section 4.4.1, the minimum fuse size is no less than 125%~135% of the capacitor current. In your case > 15E is ok
As per Canadian Code (OESC 23rd Edition) 26-210, the overcurrent device shall not exceeding 250% of the rated current of the capacitor.
We normally use 150~200% and also verify the capacitor damage curves obtained from the manufacture.
RE: capacitor bank fusing
RE: capacitor bank fusing
Thanks for addressing that point. 200kVar really sounds odd for 3Ph...