medium voltage metering with the two wattmeter method...

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left to right: disconnect switch, on top of the pole, the big box with two "antennae" potential transformer, below the big barrels current transformer, next pole big barrel with two "antennae" isolation switch. this supplies a "big box" shop that sells white goods (washing machines and the like) I couldn't take a photo of the meter as there was a large truck in the way. of course the current transformers need their secondary short circuited. and of course this metering method works only in three phase systems without a neutral.

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Dimitris Tzortzakakis
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