How does the tariff get switched on and off?
A device called a load control Relay is installed by Energex into your main switchboard This device is controlled by messages sent down the electricity lines. A message is sent to switch the relay on and another message is sent to switch the relay off. For those technically minded types among us, a harmonic frequency of 50 Hertz is superimposed on the line. The relay changes state according to the frequency. This will sometimes cause a fluctuation in dimmed lights at the time the frequency is being injected into the network.
