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ABB REF542plus compact digital bay control unit for medium-voltage applications, combining measurement, monitoring, protection, control and self-diagnostics. Supports feeder, transformer and motor protection.
ABB BIO3 binary input/output module, 88-132 V DC (50 V DC), spare part for REF542plus medium-voltage protection systems.
ABB BIO3 binary input/output module, 176-264 V DC (143 V DC), spare part for REF542plus medium-voltage protection systems.
ABB BIO3 binary input/output module, 88-132 V DC input / 50 V DC output, for REF542plus medium-voltage feeder protection and control.