Mitsubishi Electric 800 Series Instruction Manual page 609

 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
Fault signal
*1 Use an FFT to measure the output voltage accurately. A tester or general measuring instrument cannot measure accurately.
*2 When the setting of Pr.195 ABC1 terminal function selection is the positive logic
608
7. PRECAUTIONS FOR MAINTENANCE AND INSPECTION
7.2 Measurement of main circuit voltages, currents and powers
Measuring point Measuring instrument
Across R/L1 and S/ Digital power meter (for inverter)
L2, S/L2 and T/L3, T/
L3 and R/L1
R/L1, S/L2, T/L3 line
current
R/L1, S/L2, T/L3 and
Across R/L1 and S/
L2, 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.
Across U and V, V
Digital power meter (for inverter)
and W, and W and U
U, V and W line Digital power meter (for inverter)
currents
U, V, W and across
U and V, V and W
Calculate in similar manner to power supply side power factor.
Across P/+ and N/- Tester such as a digital multimeter
Across 2, 4(+) and 5 Tester such as a digital multimeter,
or moving-coil type instrument
Across 1(+) and 5
(internal resistance 50 kΩ or more)
Across 10(+) and 5
Across 10E(+) and 5
Across AM(+) and 5
Across CA(+) and 5
Across STF, STR,
RH, RM, RL, JOG,
RT, AU, STP
(STOP), CS, RES,
MRS(+) and SD (for
sink logic)
Across A1 and C1 Tester such as a digital multimeter
Across B1 and C1
Remarks (reference measured value)
Commercial power supply
Within permissible AC voltage fluctuation (Refer to
page 612.)
P1 = W11 + W12 + W13 (3-wattmeter method)
Difference between the phases is within 1% of the
*1
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 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
When open
20 to 30 VDC
ON voltage: 1 V or less
*2
Continuity check
Normal: discontinuity across A1 and C1 (continuity
across B1 and C1)
Fault: continuity across A1 and C1 (discontinuity
across B1 and C1)
"5" is
common
"SD" is
common