Overcurrent Protection Coordination with Delta/wye Bank
Overcurrent Protection Coordination with Delta/wye Bank
(OP)
What is the best practice for sensing low side bus ground faults on a Delta-wye transformer with high side protection? Since a L-G fault on the low-side appears as a L-L fault on the high side, the phase overcurrent elements must react to this fault. If the transformer is on the larger side or has a high impedance, it becomes difficult to set the high side phase overcurrent elements at a level that allows for maximum transformer loading, but also still reacts to L-G faults on the low side of the transformer in a reasonable time span.






RE: Overcurrent Protection Coordination with Delta/wye Bank
RE: Overcurrent Protection Coordination with Delta/wye Bank
RE: Overcurrent Protection Coordination with Delta/wye Bank
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RE: Overcurrent Protection Coordination with Delta/wye Bank