Is it standard practise to fit pfr's to the breaker side of an MCCB, rather than the supply side in a motor control panel which has a standby generator connected, in case of mains failure ?
Is it standard practise to fit pfr's to the breaker side of an MCCB, rather than the supply side in a motor control panel which has a standby generator connected, in case of mains failure ?
Looking at that drawing and feeling slightly dense, what exactly is the load that must be disconnected if one phase fails, and how is that achieved ?
I presume the fault you are guarding against with the phase fail tester is the loss of only one of fuses F1/F2/F3 is that correct
Is everything after that point ganged MCB or similar 3 or 4 pole switching?
Mike.
Looking at that drawing and feeling slightly dense, what exactly is the load that must be disconnected if one phase fails, and how is that achieved ?
I presume the fault you are guarding against with the phase fail tester is the loss of only one of fuses F1/F2/F3 is that correct
Is everything after that point ganged MCB or similar 3 or 4 pole switching?
Mike.
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