NER Installations 2016 to 2021

Neutral Earthing Resistor Installations

To comply with the EEA Guide to Power System Earthing Practice 2009, PowerNet contracted Decom to install  Neutral Earthing Resistors (NERs) at Substations under its management.

This project began in 2016 and since we have installed 29 NERs on the TPC, EIL and OtagoNet Networks, with more installed as part of major projects.

The work was challenging, with all aspects involved (civil works, high voltage electrical, protection and SCADA), often with limitations on access to equipment.