Earth Fault Relays NPIH800 / NPIH800R
The NPIH800 / NPIH800R relays protect three-phase electrical networks against phase to earth faults.

Do you need Directional Earth Fault protection? Consider the NPIHD800 / NPIHD800R.

If your system is un-earthed or features a very high impedance earth you may wish to consider the more sensitive earth fault relay NPIHD800-S1.

ANSI functions for NPIH800 / NPIH800R: 
51N / 50N / 86 / 74TC / 50NBF

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