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Mitsubishi Electric FR-A520-0.4K -55K Instruction Manual Page 203

Transistorized inverter, high function & low acoustic noise.
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Item
Measuring Point
Across R-S, S-T and T-R
Power supply voltage V
1
〈Across L
Power supply side
R, S and T line currents
〈L
current I
, L
and L
1
2
1
At R, S and T, and across R-S,
Power supply side power
S-T and T-R
〈At L
L
P
1,
2
1
L
-L
, L
1
2
2
Calculate after measuring power supply voltage, power supply side current and power supply side
power.
Power supply side power
factor Pf
1
Pf
=
1
3 V
Output side voltage V
Across U-V, V-Wand 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
Pf
=
2
2
3 V
Across P-N 〈Across + and −〉
Converter output
Across 2 (+) −5
Across 1 (+) −5
Frequency setting signal
Across 4 (+) −5
Across 10 (+) −5
Frequency setting power
Across 10E (+) −5
supply
Across FM (+) −SD
Frequency meter signal
Across AM (+) −5
Start signal
Across STF, STR, RH, RM, RL,
JOG, RT, AU, STOP, CS (+) −SD
Select signal
Across RES (+) −SD
Reset
Across MRS (+) −SD
Output stop
Across A-C
Alarm signal
Across B-C
Note
1. Accurate data will not be obtained by a tester.
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 because overcurrent losses occurring in the metallic
parts inside the instrument will increase and may lead to burnout.
In this case, use an approximate effective value type instrument.
* Values in parentheses indicate those for 400V class.
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Measuring Points and Instruments
Measuring Instrument
Moving-iron type AC voltmeter
-L
, L
-L
and L
-L
1
2
2
3
3
1
Moving-iron type AC ammeter
line currents〉
1
Electrodynamic type single-
and L
, and across
3
phase wattmeter
-L
and L
-L
3
3
1
P
1
× 100%
× I
1
1
Rectifier type AC voltmeter
(Note 1) (Not moving-iron type)
Moving-iron type AC ammeter
(Note 3)
Electrodynamic type single-
phase wattmeter
P
2
× 100%
× I
2
2
Moving-coil type (such as
tester)
Moving-coil type (Tester, etc.
may be used) (Internal
resistance: 50kΩ or larger)
Moving-coil type
(such as tester)
189
PROTECTIVE FUNCTIONS
Remarks
(Reference Measured Value) *
Commercial power supply
Within permissible AC voltage
fluctuation
+ W
+ W
P
= 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.
+ W
P
= 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
DC8V
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>
Across A-C: Discontinuity Continuity
Across B-C: Continuity
<At ON>
Discontinuity

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