ZAHRA RST 25 (3Phase) Sequence RelayZAHRA RST 25 Phase Failiure Phase Sequence Under,Over Voltage Relay Operation Instructions The electronic phase filure relay RST 25 offers phase failure, phase shift, phase flashing, asymmetric,phase sequence and also under and overvoltage control Connection The RST 25 can be connected as following in the installation diagram: FIG 1: Connection of the relay before operation. When the relay is connected as in FIG 1, the three yellow LEDs L1, L2 and L3
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