Type 50B - Circuit-Shield - Fault Current Detector Relay
Type 50D, 50H - Circuit Shield - High Dropout Overcurrent Relays
Type 50R - Harmonic Restraint Relay
Type 49/50/51, 49/50 and 49 - Circuit Shield - Overload Relays
Type 50H - Instantaneous Overcurrent - Circuit Shield
Type 50, Type 50I - Instantaneous overcurrent relays
