Types 47, 47D, 47H - Circuit Shield - Undervoltage and Phase Sequence Relays
THREE-PHASE UNDERVOLTAGE AND PHASE-SEQUENCE RELAYS - TYPE 47 Inverse Delay - TYPE 47D Definite Delay - TYPE 47H Instantaneous - Catalog Series 412F/412N Drawout Test Case - Catalog Series 212F/212N Standard Case
Three Phase Voltage Relay - Type 47 Inverse Delay - Type 47D Definite Delay, Type 47H Instantaneous Relays