Sumitomo CAI40C, Operation Manual

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11
4-3 Precautions as to wiring
1) Main circuit
1. Do not connect the power input terminal and motor output
terminals (U, V, and W) reversely.
2. Do not ground the motor output terminals (U, V, and W). Check
that the motor output terminals are not grounded before turn-
ing the power on.
3. Be sure to turn off the power before wiring the main circuit
terminal, grounding terminal, and control terminal or when
removing the wiring.
4. Do not short-circuit the motor output terminals (U, V, and W)
with each other. Check that motor output terminals are not
short-circuited with each other before turning the power on.
5. When operating the inverter, use a magnetic circuit breaker
(MCB) or a thermal relay (TH-RY) as necessary according to
the standard connection diagram. Select a magnetic circuit
breaker and a thermal relay that match the motor rating.
6. The grounding terminal is inverter ground (FG). Use Type D
grounding (100 or less; 1.6 mm or less).
7. Do not install a power factor improved (phase-advanced) ca-
pacitor, which may be broken by heating because of the high
harmonics of the inverter output.
8. Be sure to use a crimp terminal with insulation sheathing for
connection to the main circuit terminal (100 V, N, 200 V).
2) Control circuit
1. Do not apply voltage exceeding 48 VDC or current exceeding
50 mA to the output terminal (AL, COM), or do not apply
voltage to reversed polarity.
2. Do not apply voltage to the input terminal (RUN. F/R. MBS)
from outside.
3. When driving the relay directly by the output terminal (AL,
COM), install a flywheel diode (FD).
4. The grounding wire connected to the control circuit must be
twisted or shielded wire.
5. Ground the shield of the shielded wire.
6. Separate the cable to be connected to the control circuit from
the power line.
7. Apply a screwdriver perpendicular to the terminal and tighten
the wire.
CAUTION
!