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Recent content by JLSN

  1. JLSN

    A few motors tripped at the same time!!

    Hi, We had a power system (15 kV) with a a neutral current limited by a resistor to 1400 amps for single phase to ground faults. When we had a feeder cable failure in the system, a few motors connected at that voltage level tripped at the same time. When you have this kind of fault, the two...
  2. JLSN

    Zero sequence CT

    Hi, We had a trip on a motor due to 50G when we had a fault in other part of the system that has nothing to do with the motor. The system has a low resistance ground system. The zero sequence to the 50G function is provided by a toroidal CT where you run the 3 power cables thru. Now, looking...
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