Voltage and Frequency NPU800 / NPU800R
NPU800 / NPU800R relays ensure the monitoring of the voltages of electrical supply networks. They offer over- and under- frequency and over- and under-voltage protection across all three phases.

ANSI functions: 
59 / 27 / 27 P / 81O / 81U / 86 / 74TC

The NPU800R performs the same functions as the NPU800 but uses the same modular plug-in base design as the 7000 series relays.  Alternatively the NPU800RE also uses the plug-in bases but is 50% wider to accommodate more I/O connections

These relays are part of the NP800 range, offering multi-function protection and communication via Modbus (RS485) or Modbus TCP (Ethernet).  A full brochure is available on the NP800 range page