Measurement Of Voltages And Currents - Mitsubishi Electric FR-A700 Instruction Manual

Measurements on the main circuit
8.2.3

Measurement of voltages and currents

Since the voltages and currents on the inverter power supply and output sides include harmon-
ics, measurement data depends on the instruments used and circuits measured.
When instruments for commercial frequency are used for measurement, measure the following
circuits with the instruments given on the next page.
Three phase
power supply
Instrument types
Fig. 8-15: Examples of measuring points and instruments
8 - 16
Input
voltage
Input
current
Inverter
Maintenance and inspection
Output
voltage
Output
current
To the motor
Moving-iron type
Electrodynamometer type
Moving-coil type
Rectifier type
I001313E