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Question:

Why is not available at the same time around the two wire clamp ammeters

Why is not available at the same time around the two wire clamp ammeters

Answer:

[three-phase balanced line (e.g. motor circuit)]: clamp ammeters and grabbed the two wires, the current measurement shows the number of wires is another value!
If a fire is a zero line, two lines of the magnetic field generated by the opposite offset, no magnetic field through the clamp meter,
If two lines are clamped at the same time, the meter is read as a vector and current through the two lines, not a line of current.
[three-phase four wire and three-phase unbalanced circuit]: clamp ammeters also grabbed two wires (excluding the zero line), the number of two-phase current vector and "clamp ammeters, also cannot reflect the actual current line, not accurate.
[]: "single line clamp ammeters also grabbed two wires"... Now... (the firing line and the zero line) the resultant magnetic field is zero, the table shows the number of probe current is zero, can not reflect the real current line.

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