NPI800 / NPIR800 & NPI800R – Phase and Earth Overcurrent Relay
Products family : Current Protection
Sector : Industry, Railway
NPI800 / NPIR800 & NPI800R provide the three-phase and earth fault overcurrent protection for medium and high voltage electrical networks. These multi-function relays supervise phase to phase and phase to earth faults, negative sequence currents, thermal state of the protected device and the good operating of the circuit breaker and its trip circuit.
NPI800R (R2 case) is dedicated to the refurbishment of 700 and 7000 series (R2 and R3 cases) 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 NPI800R).
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
46 – Reversal, loss of phase or unbalance phase
46BC – Broken conductor detection
49 – Thermal overload
50 – Instantaneous overcurrent
50BF – Breaker failure with overcurrent
50N – Instantaneous earth fault overcurrent
50NBF – Breaker failure with earth fault overcurrent
51 – Overcurrent
51N – Earth fault overcurrent
74TC – Trip circuit supervision of the breaker
79 – Recloser
86 – Latching of the output contacts
Logical selectivity