NPIHD800-S1 – Sensitive Ground Fault Directional and Overcurrent Relay
Products family : Feeder Protection, Current Protection
Sector : Industry
NPIHD800-S1 provides the ground fault overcurrent protection for medium and high voltage electrical networks. Dedicated to non-grounded system applications, this multi-function and directional relay supervises phase to earth short-circuits and operating of the circuit breaker and its trip circuits.
As well as the usual protection functions, NP800 relays provide monitoring, measurement and recording of the electrical quantities of the network.
ANSI codes
50N – Instantaneous earth fault overcurrent
50NBF – Breaker failure with earth fault overcurrent
51N – Earth fault overcurrent
67N – Earth directional overcurrent
74TC – Trip circuit supervision of the breaker
86 – Latching of the output contacts