Mitsubishi Electric FR-E700EX Instruction Manual page 298

Measurement of main circuit voltages, currents and powers
Measuring Points and Instruments
Item Measuring Point
R/L1 and S/L2
Power supply voltage
S/L2 and T/L3
V1
T/L3 and R/L1
Power supply side
R/L1, S/L2, T/L3 line
current
current
I1
R/L1, S/L2, T/L3 and
Power supply side
R/L1 and S/L2,
power
S/L2 and T/L3,
P1
T/L3 and R/L1
Calculate after measuring power supply voltage, power
supply side current and power supply side power.
Power supply side
[Three-phase power supply]
power factor
Pf1
Pf
Across U and V,
Output side voltage
V and W,
V2
W and U
Output side current
U, V and W line currents
I2
U, V, W and
Output side power
U and V,
P2
V and W
Calculate in similar manner to power supply side power factor.
Output side power
factor
Pf
Pf2
Converter output Across P/+ and N/-
Frequency setting Across 2(+) and 5
signal Across 4(+) and 5
Frequency setting
Across 10(+) and 5
power supply
Frequency meter
Across FM(+) and SD
signal
Across SD and the
Start signal following:
Select signal STF, STR, RH, RM, or
RL(+)
Reset Across RES(+) and SD
Output stop Across MRS(+) and SD
Across A and C
Fault signal
Across B and C

Use an FFT to measure the output voltage accurately. An FA tester or general measuring instrument cannot measure accurately.

When the setting of Pr.192 A,B,C terminal function selection is positive logic.

A digital power meter (designed for inverter) can also be used to measure.
296
Measuring Instrument
Moving-iron type AC voltmeter
Moving-iron type AC ammeter 
Digital power meter (designed
for inverter) or electrodynamic
type singlephase wattmeter
P
1

----------------------- - %
= 100
1

3V I
1 1
Rectifier type AC voltage meter
, 
(moving-iron type cannot
measure)
Approximate effective-value
rectifier type AC ammeter 
Digital power meter (designed
for inverter) or electrodynamic
type singlephase wattmeter
P
2
 
----------------------- - %
100
2

3V I
2 2
(tester and such may be used)
(internal resistance 50k or more)
Commercial power supply
Within permissible AC voltage fluctuation
(Refer to page 302)
P
1
Difference between the phases is within 1% of the
maximum output voltage.
Difference between the phases is 10% or lower of
the rated drive unit current.
P 2
2-wattmeter method (or 3-wattmeter method)
Drive unit LED display is lit. 1.35  V1
Moving-coil type
(such as tester) 380V maximum during regeneration
DC0 to 10V, 4 to 20mA
DC5.2V
Approximately 5VDC at maximum
frequency (without frequency meter)
Moving-coil type
Pulse width T1: Adjust with C0 (Pr.900)
Pulse cycle T2: Set with Pr.55
(frequency monitor only)
When open
20 to 30VDC
ON voltage: 1V or less
Electric continuity check
Moving-coil type
(such as tester) Across A and C
Across B and C
Remarks (Reference Measured Value)
=W +W +W
11 12 13 (3-wattmeter method)
=W 21 +W 22
T1
DC8V
T2
<Normal>
Discontinuity
Continuity
"5" is
common
"SD" is
common.
<Fault>
Continuity
Discontinuity