Mitsubishi Electric FR-S520E Series Instruction Manual page 203

Measuring
Item
Power supply
Across R-S,
voltage
S-T, T-R
V1
Power supply side
R, S, and T
current
line currents
I1
At R, S and T,
Power supply side
and across R-
power
S, S-T and T-
P1
R
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
Pf1=
Output side
Across U-V,
voltage
V-W and W-U
V2
Output side
U, V and W
current
line currents
I2
Output side power U, V, W and
P2 U-V, V-W
Calculate in similar manner to power supply side power factor.
Output side power
factor
Pf2=
Pf2
Converter output Across P-N
Across 2(+)-5
Frequency
setting signal
Across 4(+)-5
Frequency setting
Across 10(+)-5
power supply
Frequency meter Across
signal FM(+)-SD
Measuring Points and Instruments
Measuring
Point Instrument
Moving-iron
type AC voltmeter
Moving-iron
type AC ammeter
Electrodynamic type
single-phase wattmeter
P1
100%
3V1 I1
Rectifier type AC
voltmeter (Caution 1)
(Moving-iron type
cannot measure)
Moving-iron type AC
ammeter
(Caution 2)
Electrodynamic type
single-phase wattmeter
P2
100%
3V2 I2
Moving-coil type
(such as tester)
Moving-coil type
(Tester and such may
be used)
(Internal resistance:
Ω
50k
Precautions for maintenance and inspection
(Reference Measurement Value)
Commercial power supply
Within permissible AC voltage
fluctuation
(Refer to page 196.)
P1 = W11 + W12 + W13
(3-wattmeter method)
[For single-phase power supply]
Pf1=
V1
Difference between the phases is
within ±1% of the maximum output
voltage.
Current should be equal to or less
than rated inverter current.
Difference between the phases is
10% or lower of the rated inverter
current.
P2 = W21 + W22
2-wattmeter method
(or 3-wattmeter method)
Inverter LED display is lit
1.35 × V1
0 to 5VDC/0 to 10VDC
4 to 20mADC
5VDC
Approx. 5VDC at maximum
frequency
(without frequency meter)
or larger)
8VDC
Pulse width T1: Adjust with
Pulse cycle T2: Set with
193
Remarks
P1
100%
I1
T1
T2
C1
Pr. 55 (Pr.
56)
3