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Why is the KWH reading on the PM700 PM800 or PM9 meter a negative value

A negative KHW reading is usually due to one of two things

The Current transformers (CT's) have been fitted onto the cable or busbar the wrong way round. The P1 side of the CT should be towards the supply and the P2 side of the CT should be towards the load.

Alternatively, if the CT is fitted correctly, the problem could be due to the secondary wiring from the CT to the meter being incorrectly connected.
FA86375  |  21-Dec-2010  | Technical Characteristics
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