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Mitsubishi Electric FR-A500 Instruction Manual Page 222

Transistorized inverter.
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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

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    good manual and it is very good to understand the contant of inverter and i lernt many things in this manual