6.3 Method of measuring main circuit voltage, current and output power
(1) Method of measuring voltage and current
Since the inverter power supply (input) , output voltage and current include
* high-harmonic components, date (measurement results) depend on instrument
and circuit used in measurement.
To measure voltafe and current with an instrument for commercial
frequency application, use the instrument in accordance with Table 3, and
the circuit shown .in Fig. 8.
3 -phase
power
SUPPlY
Input
VOltage
VwAi
Av
1 )
1
To
Fig. 8 Measuring points and instruments
motor
Output
voltage
output
current
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