How to measure the actual current of three-phase induction motor?
Measuring current is usually measured by a caliper table.
Available clamp type universal meter, but better according to the inverter panel display current adjustment is better, because the frequency of downtime is measured according to its own subject and tracking may have certain discrepancy
A current meter connected with the two coil is then instructed to measure the current of the line being measured. A table can shift through the switch, the scale change. But the switch is not allowed to operate when charged. Clamp meter general accuracy is not high, usually 2.5 ~ 5. In order to facilitate the use of the table there are different ranges of switching switches for measuring different levels of current and voltage measurement function.
Clamp meter is composed of a current transformer and current meter assembly. The iron core of the current transformer can be opened when the wrench is tightened; the wire through which the current is measured can be cut through the opening of the iron core without cutting off, and when the wrench is released, the iron core is closed. Through the test circuit of the core, the wire becomes the primary coil of the current transformer, in which the current is induced in the two coil through the current.
