Designing a watt meter using a current transducer but want to avoid field cancellation. How can I do this?
Answer:
You must separate the 2 wires and either put one of them through a current transformer or other magnetic transducer, or break the connection of one and insert a shunt. Sorry, no other way, since the equal but opposite currents in the pair will cancel if both are ran through a CT. You can get a clamp-type CT that will go around a wire without having to unconnect it, but still only one of the 2 wires must go through it.
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