Mitsubishi Electric FR-A800 Series Instruction Manual page 823

 Measuring points and instruments
Item
Input voltage
V1
Input current
I1
Input power
P1
Input power factor
Pf1
Output voltage
V2
Output current
I2
Output power
P2
Output power factor
Pf2
Converter output
Frequency setting
signal
Power supply for a
frequency setting
potentiometer
Frequency meter signal
Start signal,
selection signal,
reset signal,
output stop signal
Fault signal
*1 Use an FFT to measure the output voltage accurately. A digital multimeter or general measuring instrument cannot measure accurately.
*2 When the setting of Pr.195 ABC1 terminal function selection is the positive logic.
822
7. PRECAUTIONS FOR MAINTENANCE AND INSPECTION
7.2 Measurement of main circuit voltages, currents, and powers
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Measuring point
Between R/L1 and S/L2,
S/L2 and T/L3, and T/L3
and R/L1
Line current at R/L1, S/L2,
Digital power meter (designed for
and T/L3
inverter)
At R/L1, S/L2, and T/L3,
and between R/L1 and S/
L2, S/L2 and T/L3, and T/
L3 and R/L1
Calculate after measuring input voltage, input current and input power.
Digital power meter (designed for
Between U and V, V and
W, and W and U
inverter)
Line current at U, V, and W
Digital power meter (designed for
At U, V, and W, and
inverter)
between U and V, and V
and W
Calculate in similar manner to the input power factor.
Between P/+ and N/- Digital multimeter or other tester Inverter LED indication 1.35 × V1
2, and between 4(+) and 5
Between 1(+) and 5
Between 10(+) and 5
Between 10E(+) and 5
Between AM(+) and 5
Between CA(+) and 5
Digital multimeter or other tester,
or moving-coil type instrument
(internal resistance 50 kΩ or
more)
Between FM(+) and SD
Between STF, STR, RH,
RM, RL, JOG, RT, AU,
STP (STOP), CS, RES, or
MRS(+) and SD (for sink
logic)
Between A1 and C1
Digital multimeter or other tester
Between B1 and C1
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Measuring instrument
Commercial power
Within permissible AC voltage fluctuation. (Refer to
page
P1 = W11 + W12 + W13 (3-wattmeter method)
Difference between the phases must be within 1%
*1
of the maximum output voltage.
Difference between the phases must be within
10%.
P2 = W21 + W22
2-wattmeter method (or 3-wattmeter method)
0 to 10 VDC, 4 to 20 mA
0 to ±5 VDC and 0 to ±10 VDC
5.2 VDC
10 VDC
Approximately 10 VDC at maximum
frequency
(without frequency meter)
Approximately 20 mADC at
maximum frequency
Approximately 5 VDC at maximum
frequency
(without frequency meter)
Pulse width T1: Adjust with C0
(Pr.900).
Pulse cycle T2: Set with Pr.55
(for frequency monitor only).
Voltage when terminal is open: 20 to
30 VDC.
Voltage when signal is ON: 1 V or
less.
Continuity check
Normal: discontinuity across A1 and C1 (continuity
across B1 and C1)
Fault: continuity across A1 and C1 (discontinuity
across B1 and C1)
Remarks (reference measured value)
826.)
T1
8VDC
T2
*2
Terminal 5 is
a common
terminal.
Terminal SD
is a common
terminal.