Mitsubishi Electric FR-E 500 Instruction Manual page 201

Item
Power supply
voltage Across L
(V1)
Power supply side
current L , L
1
(I1)
Power supply side
At L
power
L -L
1
(P1)
Calculate after measuring power supply voltage, power supply side current and power supply side
power.
Power supply side
[For three-phase power supply]
power factor
(Pf1)
Pf1=
Output side
voltage Across U-V, V-W and W-U
(V2)
Output side current
U, V and W line currents
(I2)
Output side power At U, V and W, and across U-
(P2) V and V-W
Calculate in similar manner to power supply side power factor.
Output side power
factor
Pf2=
(Pf2)
Across + - −
Converter output
Across 2 (positive)-5
Frequency setting
signal
Across 4 (positive)-5
Frequency setting
Across 10 (positive)-5
power supply
Frequency meter
Across AM (positive)-5
signal
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
Note: 1. Use FFT to measure the output voltage accurately. It can not be measured accurately with a meter or
general instrumentation.
2. If the carrier frequency exceeds 5kHz, do not use this instrument since using it may increase eddy-
current loss produced in metal parts inside the instrument, leading to burnout.
In this case, use an approximate effective value type instrument.
*The value within the parentheses is for the 200V class.
Measuring Points and Instruments
Measuring Point
-L , L -L , L -L
1 2 2 3 3 1
and L line currents
2 3
, L and L , and across
1 2 3
, L -L and L -L
2 2 3 3 1
P
1
100%
3V I
1 1
P
2
100%
3V I
2 2
PROTECTIVE FUNCTIONS
Measuring Instrument
Moving-iron type AC
voltmeter
Moving-iron type AC
ammeter
Electrodynamic type
single-phase wattmeter
(Note 1)
(Cannot be measured
by moving-iron type)
Moving-iron type AC
ammeter
(Note 2)
Electrodynamic type
single-phase wattmeter
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:
50kΩ or larger)
Moving-coil type
(such as a meter)
185
Remarks
(Reference Measured Value)
Is the commercial power supply
within permissible variation of AC
voltage (Refer to page 186)
P1 = W11 + W12 + W13
(3-wattmeter method)
[For single-phase power supply]
P
1
Pf1= 100%
V I
1 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 × V1
Maximum 760V (380V) during
regenerative operation
0 to 5V/0 to 10VDC
4 to 20mADC
5VDC
Approximately 10VDC at
maximum frequency (without
frequency meter)
20 to 30VDC when open.
ON voltage: 1V or less
Continuity check
<Normal> <Fault>
Across A-C: DiscontinuityContinuity
Across B-C: Continuity Discontinuity