Transpower Outdoor Substation
A substation contains electrical equipment that enables the high voltageAny voltage exceeding 1000 V a.c. or 1500 V d.c. More transmission lines to be connected and disconnected as required. There may also be other equipment, such as transformers, that change (i.e. ‘transform’) the voltage and current of the electricity.
Transpower has 178 substations across New Zealand. The primary purpose of a substation is to ‘transform’ the generator voltage (typically around 11,000 volts or 11 kV) at generating stations up to the transmission voltage (typically 110,000 volts or 220,000 volts) and down again at substations, usually located in towns and cities, to a level that allows it to be used by a distribution company (typically at 33,000 volts or 11,000 volts).
