NPIH800 & NPIH800R – Earth Fault Overcurrent Relay
Products family : Transformer Protection
Sector : Industry, Railway
NPIH800 & NPIH800R provide the earth fault overcurrent protection for medium and high voltage electrical networks. These numerical and multi-function relays supervise in particular the phase to earth faults and the good operation of the circuit breaker and its trip circuit.
NPIH800R (R2 case) is dedicated to the refurbishment of 700 and 7000 series (R2 case) of CEE
Two mountings are available, Flush Rear Connection (EDPAR) or Projecting Rear Connection (SDPAR). A blank cover R1, provide in option, can improve mechanical installation (replacement of CEE case R3 by a NPIH800R).
As well as the usual protection functions, NP800 relays provide monitoring, measurement and recording of the electrical quantities of the network.
Setting, reading, measurement and recording are all available locally or remotely.
ANSI codes
50N – Instantaneous earth fault overcurrent
50NBF – Breaker failure with earth fault overcurrent
51N – Earth fault overcurrent
74TC – Trip circuit supervision of the breaker
86 – Latching of the output contacts
Logical selectivity