Three-phase BIASED DIFFERENTIAL RELAY Rated frequency 60Hz Three-phase biased differential relays for protection of power-transformers and generator-transformer units Assembly boxes SPAD-ZK 1 or SPAD-ZK 2 Assembly boxes not included in price Auxiliary supply voltage 17я??0 V d.c
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Parts & Services >> Medium Voltage Products and Systems >> Distribution Automation >> Transformer Protection >> SPAD J6