Wattson Sensor for 2 & 3 phase systems
by DIY Kyoto
The additional Wattson sensor is only required for two or three phase systems. If you have a two phase system you will require one extra sensor. If you have a three phase system you will require two extra sensors. You will not need to purchase an additional sensor for single phase households as one comes with each Wattson smart meter
Some older Economy seven installations may also require an additional sensor for connection to the lower tariff circuit.
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