The purpose of a Neutral Earthing Resistor is to generate the active current some types of protection relays need in order to be able to detect earth faults.
Swedish Neutral supplies the following types of Neutral Earthing Resistors [NER];
Swedish Neutral NER:s are supplied with overload protection, local control panel and remonte control interface. The NER:s are available for both indoor (dry type) and outdoor (oil cooled) use.