NPIDR800R ensures overcurrent phase and earth current protection, in medium and high voltage electricity networks against short circuits of all types. This multifunction and directional (D) relay monitor faults between phases or between phase and earth, reverse currents, the thermal state of a piece of equipment, and also the proper functioning of the circuit breaker and its triggering circuit. An integrated recloser allows the resumption of service of air departures automatically.

This recloser has a standard mode with 1 fast cycle and 3 slow cycles and a custom mode adapted to other more specific modes of operation.

This function associated with an R type modular unit, thus allows the NPIDR800R to be used for quick replacement, by equivalence of function, of the relays of the CEE relays of the 7000 series (mechanical interchangeability).