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Mitsubishi Electric 800 Series Hardware Instruction Manual Page 113

Separated converter type.
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 Measuring points and instruments
Item
Power supply voltage
V1
Input current
I1
Input power
P1
Input power factor
Pf1
Converter output
Operation enable signal
External thermal relay
signal
Reset signal
Alarm signal
112
5. PRECAUTIONS FOR MAINTENANCE AND INSPECTION
5.2 Measurement of main circuit voltages, currents, and powers
Measuring point
Measuring instrument
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
and T/L3
(designed for 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 multimeter or other
Between P/+ and N/-
tester
Digital multimeter or other
Across terminals RDI,
tester, or moving-coil type
OH, RES(+) and SD (for
instrument (internal
sink logic)
resistance 50 kΩ or more)
Between A1 and C1
Digital multimeter or other
Between B1 and C1
tester
Remarks (reference measured value)
Commercial power
Within permissible AC voltage fluctuation. (Refer
to
page
118.)
P1 = W11 + W12 + W13 (3-wattmeter method)
Inverter LED indication 1.35 × V1
Voltage when terminal is open: 20
to 30 VDC.
Voltage when signal is ON: 1 V or
less.
*3
Continuity check
[Normal]
Across A1 and C1: Discontinuity
Across B1 and C1: Continuity
[Fault]
Across A1 and C1: Continuity
Across B1 and C1: Discontinuity
Terminal SD
is a common
terminal.

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