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Mitsubishi Electric FR-F700PJ Instruction Manual Page 330

Air-conditioning inverter.
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Measuring Points and Instruments
Item
Measuring Point
R/L1 and S/L2
Power supply voltage
S/L2 and T/L3
V
1
T/L3 and R/L1
Power supply side
R/L1, S/L2, T/L3 line
current
current
I
1
R/L1, S/L2, T/L3 and
Power supply side
R/L1 and S/L2,
power
S/L2 and T/L3,
P
1
T/L3 and R/L1
Calculate after measuring power supply voltage, power
supply side current and power supply side power.
Power supply side
power factor
Pf
1
Pf
1
Output side voltage
Across U and V, V and W,
V
and W and U
2
Output side current
U, V and W line currents
I
2
Output side power
U, V, W and
P
2
U and V, V and W
Calculate in similar manner to power supply side power factor.
Output side power
Pf
factor
2
Pf
2
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
Start signal
Across SD and STF, STR,
Select signal
RH, RM, or AU(+)
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 carrier frequency exceeds 5kHz, do not use this instrument since using it may increase eddy-current losses produced in metal parts inside the
instrument, leading to burnout. In this case, use an approximate-effective value type.

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.
Measurement of main circuit voltages, currents and powers
Measuring Instrument
Moving-iron type AC
voltmeter
Moving-iron type AC
ammeter
Digital power meter
(designed for inverter) or
electrodynamic type single-
phase wattmeter
P
1
%
=
----------------------- -
100
3V
I
1
1
Rectifier type AC voltage
meter
(moving-iron type cannot
measure)
Moving-iron type AC
ammeter
Digital power meter
(designed for inverter) or
electrodynamic type single-
phase wattmeter
P
2
=
----------------------- -
100
%
3V
I
2
2
Moving-coil type
(such as tester)
Moving-coil type
(tester and such may be
(internal resistance 50k or
Moving-coil type
(such as tester)
Remarks (Reference Measured Value)
Commercial power supply
Within permissible AC voltage fluctuation (Refer to
page 330)
P
=W
+W
1
11
12
Difference between the phases is within 1% of the
maximum output voltage.
Difference between the phases is 10% or lower of
the rated inverter current.
P
W
2 =
21 +
2-wattmeter method (or 3-wattmeter method)
Inverter LED display is lit. 1.35 × V1
0 to 10VDC, 4 to 20mADC
5.2VDC
Approximately 5VDC at maximum
frequency
(without frequency meter)
used)
8VDC
more)
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
Continuity check
Across A and C
Across B and C
+W
(3-wattmeter method)
13
W
22
"5" is
common
T1
"SD" is
T2
common.
Normal
Fault
Discontinuity
Continuity
Continuity
Discontinuity
6
325

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