NPUH800

Homopolar overvoltage protection

Monitors the zero-sequence voltage of three-phase networks with isolated or high impedance earthed neutral. It monitors phase to phase and phase to earth faults and ensures the proper functioning of the circuit breaker and its tripping circuit.

#Protection, #Relay, #Voltmetric

Zero-sequence overvoltage protection

Measurement and monitoring

Recording / event log

Disturbance recording

Local HMI

Communication interfaces	Double RS485 - Redundancy RJ45 Ethernet 10 Mbits/s RS485
Communication protocols	Modbus RTU Modbus TCP/IP
Mesures and operations	Zero-sequence voltage — zero-sequence voltage
Power supply	19 to 70 Vdc 85 to 255 Vdc/Vac (50/60 Hz)
Type of option cards	1x 10 Mb Ethernet card 1x 2 wires RS385 serial card 2x RS 485 redundant mode card 4x DI - 4x DO card
Voltage outputs	3
Digital inputs	4
Digital outputs	3
Watchdog output	1
Indication LEDs	5
Number of optional modules	2