NPG957

Generator Protection IED

The NPG957 generator protection device is well-suited for large machines that require complete generator protection and differential protection.
The device has an integrated automatic voltage regulator function. You can add up to total 9 optional modules (I/O and other type of modules) into the device for extensive monitoring and control applications.

You can also connect up to 16 RTD signals for thermal alarms and trips.

The NPG957 communicates using various protocols, including the IEC 61850 substation standard.

#Generator, #Protection

Complete synchronous machine protection.

Integrated differential protection.

3.2 kHz sampling rate

IEC 61850 2nd Edition

Large colourful configurable display

Arc flash compatible

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
Mesures and operations	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 - Standard — Standard version B - Synchronizer — Standard + Synchronizer function (25)
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	6
Sensitive current inputs	4
Voltage outputs	4
Disturbance records	100
Event logs	15000
Digital inputs	3
Digital outputs	5
Dedicated trip outputs	2
Watchdog output	1
Indication LEDs	20
Number of optional modules	9