Phase unbalance and phase reversal monitor for 3 phase mains from 300 to 500 VAC, with DPDT relay output and 0.1 to 30 sec. time delay
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1SVR730774R3300ABBPhase unbalance and phase reversal monitor for 3 phase mains from 300 to 500 VAC, with DPDT relay output and 0.1 to 30 sec. time delay