Measuring the motor voltage and the motor current by means of a moving iron instrument

Question:

Can the motor voltage and the motor current (at the output of the drive controller) be measured correctly by means of a moving iron instrument?

Answer:

a) Motor voltage:
Yes, the effective value of the motor voltage can be measured correctly by means of a  moving iron instrument. The drive controller also presents at code C0052 the effective value of the voltage between the motor phases.

b) Motor current:
Yes, the effective value of the motor current can be measured correctly by means of a  moving iron instrument. The drive controller also presents at code C0054 the effective value of the motor current.  

Symbol of the moving iron instrument:

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