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Populaire vragen (FAQ's) zoeken
Can ION meters use the same set CTs and PTs with multiple meters?

Issue
Customer would like to use the same set of Potential transformers (PTs) and/or current (CTs) multiple meters.

Product line
ION meters that require CTs/PTs

Resolution
Yes, multiple meters can use the same PTs and CTs for ION meters, but their are some things to be aware of:

  • The total burden from the current inputs of the meter must be less than the maximum burden rating of the CTs
  • If the wires between the current inputs of the meters (i.e. wire from I12 on one meter to I11 of another meter) is too long, or has a significant impedance, it may affect the overall measuring accuracy of the meters
  • Use the shortest length and largest gauge of wire possible for the CT and PT connections to limit any losses in the lines.

The below diagram is an example of a 4-Wire Wye, 3 Element diagram.

Wiring diagram

Schneider Electric Belgium

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