Discuss nuisance tripping of 100 NSX Schneider MCCB in the UK Electrical Forum area at ElectriciansForums.net
Hi gents same question would you protect a 50kwpump motor with mcbs or hrc fuses
dripping
What do you mean by both mccb's? Why are there two of them?There is
A problem with both mccbs
That's quite a wild theory. If there's a problem with a cable then you'd see evidence in the test results or during a visual inspection. If the cable is the correct CSA for the load then it won't heat up to a point where it's resistance changes significantly enough to affect the characteristics of the circuit.I was wondering could there Bea problem with a cable from the common feed being loose and while the circuit is cold there is no problem but when cables heat up the resistance will go up and possibly cause overheating overloading across 2phases and tripping the install action
Approx 50kW?Evening Gents
i have a 4 pole schneider mcb which keeps tripping intermittently the overload is set at 80A and runs in delta at around 40 A.The mcb supplies a 3 phase pump rated at approx 50kw-any one got any ideas what the problem could be .
cheers.
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