Mitsubishi Electric FR-A842-07700, Инструкция по эксплуатации

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Measurement of main circuit voltages, currents and powers
106
PRECAUTIONS FOR MAINTENANCE AND INSPECTION
 Measuring points and instruments
Item Measuring point Measuring instrument Remarks (reference measured value)
Converter unit (F
R
-CC
2)
Power supply
voltage
V1 Across R/L1 and S/L2,
S/L2 and T/L3,
T/L3 and R/L1
Digital power meter (for inverter)
Commercial power supply
Within permissible AC voltage fluctuation (Refer
to
page 110 .)
Power supply side
current
I1
R/L1, S/L2, T/L3 line
current
Power supply side
power
P1
R/L1, S/L2, T/L3 and
Across R/L1 and S/L2,
S/L2 and T/L3,
T/L3 and R/L1
P1 = W11 + W12 + W13 (3-wattmeter method)
Power supply side
power factor
Pf1
Calculate after measuring power supply voltage, power supply side current and power supply side power.
Converter output Across P/+ and N/- Digital multimeter or other tester Inverter LED is lit. 1.35
×
V1
Operation enable
signal
External thermal
relay signal
Reset signal
Across RDI, OH,
RES(+) and SD (for
sink logic) Digital multimeter or other tester,
or moving-coil type instrument
(internal resistance 50 kΩ or more) When open
20 to 30 VDC
ON voltage: 1 V or less
"SD" is
common
Alarm signal
Across A1 and C1
Across B1 and C1
Digital multimeter or other tester
Continuity check
∗3
[Normal] [Fault]
Across A1 and C1 Discontinuity Continuity
Across B1 and C1 Continuity Discontinuity
Inverte
r
Output side
voltage
V2
Across U and V, V and
W, and W and U Digital power meter (designed for
inverter)
∗1
Difference between the phases is within 1% of
the maximum output voltage.
Output side
current
I2
U, V and W line
currents
Digital power meter (designed for
inverter)
Difference between the phases is 10% or lower
of the inverter rated current.
Output side power
P2
U, V, W and
across U and V, V and
W
P2 = W21 + W22
2-wattmeter method (or 3-wattmeter method)
Output side power
factor
Pf2
Calculate in similar manner to power supply side power factor.
Frequency setting
signal Across 2, 4(+) and 5
Digital multimeter or other tester,
or moving-coil type instrument
(internal resistance 50 k
Ω or more)
0 to 10 VDC, 4 to 20 mA
"5" is .
common
Across 1(+) and 5 0 to
±
5 VDC and 0 to
±
10 VDC
Frequency setting
power supply Across 10(+) and 5 5.2 VDC
Across 10E(+) and 5 10 VDC
Frequency meter
signal
Across AM(+) and 5
Approximately 10 VDC at maximum
frequency
(without frequency meter)
Across CA(+) and 5
Approximately 20 mADC at
maximum frequency
Across FM(+) and SD
Approximately 5 VDC at maximum
frequency
(without frequency meter)
Pulse width T1: Adjust with C0
(Pr.900) .
Pulse cycle T2: Set with Pr.55 .
(frequency monitor only)
"SD" is
common
Start signal
Select signal
Reset signal
Output stop signal
Across STF, STR, RH,
RM, RL, JOG, RT, AU,
STOP, CS, RES,
MRS(+) and SD (for
sink logic)
When open
20 to 30 VDC
ON voltage: 1 V or less
Fault signal
Across A1 and C1
Across B1 and C1
Digital multimeter or other tester
Continuity check
∗3
[Normal] [Fault]
Across A1 and C1 Discontinuity Continuity
Across B1 and C1 Continuity Discontinuity
Pf
1
P
1
3V
1
I
×
1
------------------------ 100 ×
=
%
Pf
2
P
2
3V
2
I
2
×
------------------------ 100 ×
=
%
8VDC
T1