Programmable directional / Non-directional element
Draw - out case
The relay provides time graded phase and earth fault protection of Parallel transformers, Transformer feeders, Parallel feeders, ring main system etc.,
PROGRAMMABLE DIRECTIONAL INVERSE TIME CURRENT RELAY JRP 011
Principle of Operation:
The relay measures the line current from each of the phases and if it exceeds the set threshold, then relay extends a trip signal after an operating time. The relay's operating time is determined by selecting one of the four inverse time characteristics. The relay has facility to active / inhibit the high set protection feature. The relay output contacts are self reset . Relay operation without any fault current is determined by trip test facility.