Mitsubishi Electric FR-A820-00046 Instruction Manual page 1103

Precautions for maintenance and inspection
Measuring points and instruments
Item
Power supply
voltage
V1
Power supply side
current
I1
Power supply side
power
P1
Power supply side
power factor
Pf1
Output side
voltage
V2
Output side
current
I2
Output side power
P2
Output side power
factor
Pf2
Converter output
Frequency setting
signal
Frequency setting
power supply
Frequency meter
signal
Start signal
Select signal
Reset signal
Output stop signal
Tab. 7-5:
FR-A800
Measuring point Measuring instrument
Across R/L1 and
Moving-iron type AC voltmeter Commercial power supply
S/L2,
S/L2 and T/L3,
T/L3 and R/L1
Moving-iron type AC ammeter
R/L1, S/L2, T/L3 line
current
R/L1, S/L2, T/L3
and
Digital power meter (for
Across R/L1 and
inverter) or electrodynamic type
S/L2,
single-phase wattmeter
S/L2 and T/L3,
T/L3 and R/L1
Calculate after measuring power supply voltage, power supply side current and power supply side
power.
P
1
×
Pf = ------------------------ - 100
%
1
I ×
3V
1 1
Rectifier type AC voltage meter
Across U and V, V
and W, and W and
(moving-iron type cannot
U
measure.)
Moving-iron type AC ammeter
U, V and W line
currents
U, V, W and Digital power meter (for
across U and V, V inverter) or electrodynamic type
and W single-phase wattmeter
Calculate in similar manner to power supply side power factor.
P
2 ×
Pf = ------------------------ - 100
2
×
3V I
2 2
Across P/+ and Moving-coil type
N/– (such as tester)
Across 2, 4(+) and 5
Across 1(+) and 5
Across 10(+) and 5
Across 10E(+) and
5
Across AM(+) and 5
Across CA(+) and 5
Moving-coil type
(tester and such may be used.)
(internal resistance 50 kΩ or
more)
Across FM(+) and
SD
Across STF, STR, RH,
RM, RL, JOG, RT, AU,
STP (STOP), CS,
RES, MRS(+) and
SD (for sink logic)
Measuring Points and Instruments (1)
Measurement of main circuit voltages, currents and powers
Remarks (reference measured value)
Within permissible AC voltage fluctuation
(Refer to page 8-1.)
P1 = W11 + W12 + W13 (3-wattmeter method)
Difference between the phases is within 1% of
the maximum output voltage.
Difference between the phases is 10% or lower
of the inverter rated current.
P2 = W21 + W22
2-wattmeter method (or 3-wattmeter method)
%
Inverter LED is lit. 1.35 × V1
0 to 10 V DC, 4 to 20 mA
0 to ±5 V DC and 0 to ±10 V DC
5.2 V DC
10 V DC
Approximately 10 V DC at
maximum frequency
(without frequency meter)
Approximately 20 mADC at
maximum frequency
Approximately 5 V DC at
maximum frequency
(without frequency meter)
Pulse width T1:
Adjust with C0 (Pr. 900).
Pulse cycle T2: Set with Pr. 55.
(frequency monitor only)
When open
20 to 30 V DC
ON voltage: 1 V or less
"5" is
.common
T1
8 V DC
T2
"SD" is
common
7 - 13