Changing current during a fault and overcurrent relays
Changing current during a fault and overcurrent relays
(OP)
How do microprocessor relays time their overcurrent elements when the fault current changes during the fault?
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Changing current during a fault and overcurrent relays
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RE: Changing current during a fault and overcurrent relays
For varying currents, at each processor interval the relay accumulates some amount; take the trip time for the measured current and divide that into the length of the processor interval. Repeat until the sum gets to 1.
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RE: Changing current during a fault and overcurrent relays
RE: Changing current during a fault and overcurrent relays