Mitsubishi Electric FR-S500 Instruction Manual page 64

7.6.8 Measurement of main circuit voltages, currents and powers
Measurement of voltages and currents
Since the voltages and currents on the inverter power supply and output sides
include harmonics, 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 200V power input
Ar
3-phase
As
power supply
At
Instrument
types
Examples of Measuring Points and Instruments
CAUTION
Use an FFT to measure the output voltages accurately.
A tester or general measuring instrument cannot measure accurately.
Input
voltage
Input
current
Inverter
W11 R
Vr
W12
S
Vs
W13 T
Vt
P
+
Precautions for maintenance and inspection
Au
U
Vu
Av
V
Vv
Aw
W
Vw
N
V
-
59
Output
voltage
Output
current
W21
To motor
W22
:Moving-iron type
:Electrodynamometer
type
:Moving-coil type
:Rectifier type
7