NER Neutral Earthing Resistor

Neutral Grounding Resistors are designed to detect and limit fault currents within a three-phase power transformer or generator.

The resistor will be connected between the neutral point of the symmetrical three-phase winding and ground. Associated to measuring apparatus, it will allow detection and control of defaults. Neutral grounding resistors are defined through three main parameters :

– Network voltage (Un) or rated voltage (Ur = Un / √ 3)
– Fault current (In)
– Rated fault duration

In addition to the resistors, we are able to supply any associated component such as current transformers, voltage transformers, surge arrestors, disconnectors (off load, on load)… in any required configuration.

Most of the time we are able to integrate the resistor and accessories in one single cubicle.

In collaboration with M.S. Resistances, we are the leader in the International Neutral Grounding Resistor market. We can assemble the resistors in any required configuration and can get them type tested.

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