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Mitsubishi Electric FR-E500 Instruction Manual Page 202

Fr-e500 series transistorized inverter.
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Item
Measuring Point
Power supply
Across R-S (L
voltage
L
) and T-R (L
3
(V1)
Power supply
R, S and T line currents
side current
(L
, L
1
2
(I1)
Power supply
At R (L
side power
and across R-S (L
(P1)
(L
-L
) and T-R (L
2
3
Calculate after measuring power supply voltage, power supply side current and power
Power supply
supply side power.
side power factor
=
(Pf1)
Pf
1
Output side
voltage
Across U-V, V-W and W-U
(V2)
Output side
current
U, V and W line currents
(I2)
Output side
At U, V and W, and across
power
U-V and V-W
(P2)
Calculate in similar manner to power supply side power factor.
Output side
power factor
Pf2 =
(Pf2)
Across P-N (+ - −)
Converter output
Across 2 (positive)-5
Frequency
setting signal
Across 4 (positive)-5
Frequency
setting power
Across 10 (positive)-5
supply
Across FM (positive)-SD
Frequency meter
signal
Across AM (+)-5
Start signal
Across STF, STR, RH, RM,
Select signal
RL, MRS, RES-SD
Reset
Across RES (positive)-SD
Output stop
Across MRS (positive)-SD
Across A-C
Alarm signal
Across B-C
Measuring Points and Instruments
-L
), S-T (L
-
Moving-iron type AC
1
2
2
-L
)
voltmeter
3
1
Moving-iron type AC
and L
line currents)
ammeter
3
), S (L
) and T (L
),
Electrodynamic type
1
2
3
-L
), S-T
single-phase
1
2
-L
)
wattmeter
3
1
P1
× 100%
× I1
3 V1
(Cannot be measured
by moving-iron type)
Moving-iron type AC
ammeter (Note 2)
Electrodynamic type
single-phase
wattmeter
P2
× 100%
× I2
3 V2
Moving-coil type
(such as tester)
Moving-coil type
(Meter, etc. may be
used)
(Internal resistance:
50kΩ or larger)
Moving-coil type
(Meter, etc. may be
used)
(Internal resistance:
50k Ω or larger)
Moving-coil type
(such as a meter)
186
PROTECTIVE FUNCTIONS
Measuring
Instrument
(Reference Measured Value)
Is the commercial power supply
within permissible variation of AC
voltage (refer to page 188).
P1 = W11 + W12 + W13
(3-wattmeter method)
(Note 1)
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.
P2 = W21 + W22
2-wattmeter method (or 3-wattmeter
method)
Inverter LED display is lit. 1.35
Maximum 380V (760V) during
regenerative operation
0 to 5V/0 to 10VDC
4 to 20mADC
5VDC
Approximately 5VDC at
maximum frequency (without
frequency meter)
8VDC
Pulse width T1:
Adjusted with Pr. 900
Pulse cycle T2:
Set with Pr. 55
(Valid for frequency monitor-
ing only)
Approximately 10DVC at
maximum frequency (without
frequency meter)
20 to 30VDC when open.
ON voltage: 1V or less
Continuity check
A cross A -C : D iscontinuity C ontinuity
A cross B -C : C ontinuity
Remarks
×
V1
T1
T2
<Normal>
<Fault>
D iscontinuity
5

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