Mitsubishi Electric FR-V500 Series Instruction Manual page 105

Measurement of main circuit
voltages, currents and powers
Measuring Points and Instruments
Measuring
Item
Point
Power supply
Across R-S, S-T
voltage
and T-R
V1
Power supply side
R, S and T line
current
currents
I1
Power supply side At R, S and T,
power and across R-S,
P1 S-T and T-R
Calculate after measuring power supply voltage, power supply side current and power supply side
Power supply side
power.
power factor
Pf1 Pf
1
Output side voltage Across U-V, V-W
V2 and W-U
Output side current U, V and W line
I2 currents
At U, V and W,
Output side power
and across U-V
P2
and V-W
Calculate in similar manner to power supply side power factor.
Output side power
factor
Pf
2
Pf2
Converter output Across P-N
Across 2(+)-5
Speed setting signal
(Torque setting Across 1(+)-5
signal)
Across 3(+)-5
Frequency setting
Across 10E(+)-5
power supply
Across DA1(+)-5
Speed meter signal
Across DA2(+)-5
Across STF,
Start signal
STR, DI1, DI2,
Select signal
DI3, DI4(+)-SD
Across A-C
Alarm signal
Across B-C
CAUTION
1. Use an FFT to measure the output voltage accurately. A tester or general measuring instrument
cannot measure accurately.
2. 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 approximately effective value type instrument.
Measuring Instrument
Moving-iron type AC voltmeter
Moving-iron type AC ammeter
Electrodynamic type single-
phase wattmeter
P
1
= 100%
3V I
1 1
Rectifier type AC voltmeter
(Caution 1)
(Moving-iron type cannot measure)
Moving-iron type AC ammeter
(Caution 2)
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 used)
(Internal resistance: 50k Ω or
larger)
Moving-coil type
(such as tester)
Remarks (Reference Measurement Value)
Commercial power supply
Within permissible AC voltage fluctuation
(Refer to page 106)
P1 = W11 + W12 + W13 (3-wattmeter method)
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 + W
2 21 22
2-wattmeter method (or 3-wattmeter method)
Inverter LED display is lit. 1.35×V1
0 to 10VDC
0 to ±10VDC
0 to ±10VDC
10VDC
±10VDC at maximum speed
(without speed meter)
Approx. 10VDC at maximum speed
(without speed meter)
When open
20 to 30VDC
ON voltage: 1V or less
Continuity check
Across A-C: Discontinuity
Across B-C:
102
"5" is
common.
"SD" is
common.
<Normal> <Abnormal>
Continuity
Continuity Discontinuity