Mitsubishi Electric FR-A500 Instruction Manual page 222

Item
Across R-S, S-T and T-R
Power supply voltage V
1
<Across L
Power supply side R, S and T line currents
current I <L
1
1
At R, S and T, and across R-S,
Power supply side power S-T and T-R
P <At L
1
L , L
2
Calculate after measuring power supply voltage, power supply side current and power supply side power.
Power supply side power
factor Pf
1
Pf
Output side voltage V Across U-V, V-W and W-U
2
Output side current I U, V and W line currents
2
At U, V and W, and across U-V
Output side power P
2
and V-W
Calculate in similar manner to power supply side power factor.
Output side power factor
Pf
2
Pf
Converter output Across P-N <Across + and ->
Across 2 (+) -5
Frequency setting signal Across 1 (+) -5
Across 4 (+) -5
Across 10 (+) -5
Frequency setting power
supply
Across 10E (+) -5
Across FM (+) -SD
Frequency meter signal
Across AM (+) -5
Start signal Across STF, STR, RH, RM, RL,
Select signal JOG, RT, AU, STOP, CS (+) -SD
Reset Across RES (+) -SD
Output stop Across MRS (+) -SD
Across A-C
Alarm signal
Across B-C
Note: 1. A tester cannot measure accurately.
2. When Pr. 195 "A, B, C terminal function selection" setting is positive logic.
3. When the carrier frequency exceeds 5kHz, do not use the 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 instrument.
* Values in parentheses indicate those for 400V class.
Measuring Points and Instruments
Measuring Point
-L , L -L and L -L >
1 2 2 3 3 1
, L and L line currents>
2 1
, L and L , and acrossL1-
1 2 3
-L and L -L >
2 3 3 1
P
1
= × 100%
1
3 V × I
1 1
P
2
= × 100%
2
3 V × I
2 2
PRECAUTIONS FOR MAINTENANCE AND INSPECTION
Measuring Instrument
Moving-iron type AC voltmeter
Moving-iron type AC ammeter
Electrodynamic type single-
phase wattmeter
Rectifier type AC voltmeter
(Note 1) (Moving-iron type
cannot measure)
Moving-iron type AC ammeter
(Note 3)
Electrodynamic type single-
phase wattmeter
Moving-coil type (such as
tester)
Moving-coil type (Tester, etc.
may be used) (Internal
resistance: 50k or larger)
Moving-coil type
(such as tester)
213
Remarks
(Reference Measured Value) *
Commercial power supply
Within permissible AC voltage
fluctuation (Refer to page 216)
P = W + W + W
1 11 12 13
(3-wattmeter method)
Difference between phases is
within ±1% of maximum output
voltage.
Current should be equal to or less
than rated inverter current.
Difference between phases is 10%
or lower.
P = W + W
2 21 22
2-wattmeter method
(or 3-wattmeter method)
POWER lamp lit
1.35 V
1
Maximum 380V (760V) during
regenerative operation
0 to 5V/0 to 10VDC
0 to ±5V/0 to ±10VDC
4 to 20mADC
5VDC
10VDC
Approximately 5VDC at
maximum frequency
(without frequency meter)
T1
8VDC
T2
Pulse width T1:
Adjusted by Pr.900
Pulse cycle T2: Set by Pr.55
(Valid for frequency
monitoring only)
Approximately 10DVC at
maximum frequency
(without frequency meter)
20 to 30VDC when open.
ON voltage: 1V or less
Continuity check (Note 2)
<At OFF> <At ON>
Across A-C: Discontinuity Continuity
Across B-C: Continuity Discontinuity
6