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Power transmission is the process of taking electricity from one place to another. The highest 3 phase AC voltage in New Zealand is 220kV (220,000 volts) within the National Grid, and other voltages are 110kV, 66kV and 50kV for transmission, 33kV for subtransmission, and 22kV, 11kV, 6.6kV, 3.3kV, 400V and 230V for distribution. However there is HVDC Inter-Island operating at 330kV and a 3 phase network between Whakamaru and Brownhill Road substations that also operates at 220kV.

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