NPF955

Feeder and line differential protection IED

The NPF955 feeder and line differential protection device offers a modular solution for feeder and line protection and control for applications that require a large I/O capacity.

It features line differential protection for two line terminal ends, while supporting extensive monitoring and control applications.

You can add up to total 11 optional modules (I/O and other type of modules) into the device to expand its monitoring and control capabilities. The NPF955 feeder and line protection device communicates using various protocols, including the IEC 61850 substation standard.

#Feeder, #LineDifferential, #Protection, #Relay

Smart dedicated process bus

Transfers standard data and up to 64 user-defined signals

Automatically synchronizes line differential protection settings from the master to the sub-node device

Compensates for communication delays without external time synchronization

A large I/O capacity

Double busbar control

Optional automatic/manual voltage regulation and/or parallel voltage regulation (AVR)

Optional transformer module protections

5-shot scheme-controlled auto-recloser

Communication interfaces	Double Ethernet RJ45 - 100Mbits/s HSR/PRP Double LC fibre Ethernet 100Mbits/s HSR/PRP Double RJ45 Ethernet 100Mbits/s Double ST fibre Ethernet 100Mbits/s RS232 RS485
Communication protocols	DNP 3.0 DNP 3.0 over TCP/IP HSR / PRP IEC 60870-5-101 IEC 60870-5-103 IEC 60870-5-104 IEC 61850 ed1 IEC 61850 ed2 IEC 61850-8-1 Goose IEC 61850-8-1 MMS Modbus I/O Modbus RTU Modbus TCP/IP SPA - Serial communication
Measurements & monitoring	Active energy — Active energy index (Ea+, Ea-) Active power — Active power (P) monitoring Apparent power — Apparent power (S) monitoring Currents — Phase currents (IL1, IL2, IL3) Frequency — Frequency monitoring Harmonics — Up to rank 31 Perturbography — 400 Hz to 3,2 kHz (8 to 64 samples per period) Power factor — Power factor monitoring – cos(φ) Q/P — Q/P – tan(φ) monitoring Reactive energy — Reactive energy index (Eq+, Eq-) Reactive power — Reactive power (Q) monitoring THD — Total harmonic distorsion Voltages — Phase voltages Zero-sequence current — Zero-sequence current, high sensitive input Zero-sequence voltage — zero-sequence voltage
Power supply	19 to 70 Vdc 80 to 265 Vac (50/60 Hz)
Software packages	A - Feeder protection B - Line differential protection C - Line differential protection + feeder protection
Type of option cards	1x 10 Mb Ethernet card 2 x RJ45 100Mb Ethernet & IRIG-B card 2 x RJ45 100MB Ethernet (HSR, PRP) 2 x ST type 100Mb Ethernet & IRIG-B card 4 x outputs 0..24 mA - 1 x input 0..4000 mA card 5x digital output card 8 x RTD input card 8x digital input card Optical fibre LC type 100MB for HSR, PRP RS 232 - Serial fibre Plastic-Plastic type RS 232 Serial fibre - Glass-Glass card RS 232 Serial fibre - Glass-Plastic card RS 232 Serial fibre - Plastic-Glass card
Current inputs	3
Sensitive current inputs	2
Voltage outputs	4
Disturbance records	100
Event logs	15000
Digital inputs	3
Digital outputs	5
Watchdog output	1
Indication LEDs	20
Number of optional modules	11