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Supply voltage
300-500 VAC, Three phase R, Y, B, N (No auxilliary supply)
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Operating Temperature range
-5 0C to 60 0C.
'PHASE SELECTOR' is the protection relay developed by 'Proton Electronics' to provide automatic switching between the R-, Y-, B- phases for providing one of the live phase supply uninterruptedly.The unit offers following protections along with 3 digit display showing R-N, Y-N, B-N voltages in scanning mode with precise accuracy.