Overcurrent Relays with Reclosers RMSR7900
Like the standard RMS7992, the RMSR7900 series protect three-phase electrical networks against any kind of short-circuit between phases or between phase and earth. 
Operates on a principle of signal sampling and calculates the harmonic spectrum of input currents up to seventh harmonic (Fast Fourier Transform, FFT).  
These relays have automatic re-closers and are designed to perform one of two functions:

RMSR7991: protects radial outgoing feeders in distribution networks. 

RMSR7992: protects incomers in distribution system substations.  Can communicate with one or more downstream RMSR7991s to grade with them or provide backup protection.

ANSI functions: 50 / 50N / 51 / 51N / 68 / 79

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