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that case, use an earth leakage breaker, which is made to pre-
vent high harmonics from reaching an inverter, in the system in
question and other systems.
(8) This inverter is for 3-phase induction motors. Do not use the
inverter for single-phase motors.
(9) When using the inverter for parallel operation of more than one
motor, select an appropriate inverter capacity so that the total
rated current will be lower than the rated current of the inverter.
When the total of motor output is used for selection, the rated
current of the inverter may be exceeded depending on the type of
motor. Exercise care.
(10) The total length of the inverter and motor wire shall not exceed
50 m (20 m in the case of shielded wire). Install a reactor, etc.
between the inverter and motor when the wiring is long.
(11) Check that the wire on the terminal block is tightened correctly.
If it is loose, overheating may result.
(12)When the inverter is used to operate a motor, radio noise may be
generated in the inverter input/output wires and motor, adversely
affecting electronic equipment. In that case, install an inverter
input/output filter or put the wire in a conduit to control the
noise to a certain extent.
(13)Pay attention to the following when an inverter with a built-in
electronic thermal is used:
Use a 3-phase induction motor (4-pole).
Adopt individual operation (one inverter for one motor).
(14)Conduct a megohmmeter test of the inverter itself only for the
main circuit according the procedure shown below. When con-
ducting a megohmmeter test for an external circuit, remove all
terminals of the main circuit so that the test voltage will not be
applied to the inverter. Use a 500 DVC megohmmeter, and
check that the reading exceeds 1 M
.
Power
Do not connect.
Inverter
Megohmmeter
Grounding
terminal
Do not connect.
Motor
Summary of Contents for CAI40C
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