12
Application and precautions of Peripherals
From the Power Source
:
z
Apply the power source at the correct rated voltage to prevent from damaging the inverter.
z
A Power Disconnect or Circuit breaker must be installed between the AC power supply and the
inverter.
Molded-case circuit breaker:
z
Utilize an appropriate circuit breaker that’s suitable for the rated voltage and current ratings of the
inverter to switch ON/OFF the power supply to the inverter and as additional protection for the
inverter.
z
Do not operate the circuit breaker to switch ON or OFF the inverter. The circuit breaker should be
used only to supply input power and should not be used for operational sequence.
Leakage circuit breaker:
z
An earth leakage circuit breaker should be added to prevent false operation cause by leakage
current and to ensure personnel safety.
Magnetic Contact:
z
The Magnetic Contact can be omitted at ordinary operation. To utilize external control, automatic
restart, or breaking controller the magnetic contact must be added at the primary side.
z
Do not operate the magnetic contact to switch ON or OFF the inverter.
Power improvement AC Reactor:
z
If large capacity power source is applied (over 600KVA), additional AC reactor may be added to
improve power factor.
Inverter:
z
Power supply input terminals L1 and L2 are not differentiated on phase sequence. They can
be arbitrarily connected. Their connection may be interchanged.
z
Output terminal T1, T2, and T3 should be connected to the U, V, and W terminals of the motor
respectively. If motor turns in opposite direction of the inverter command, simply exchanging two of
the three wire connections will correct this problem.
z
Output terminal T1, T2, and T3 must not be connected to power source to prevent from damaging
the inverter.
z
Grounding terminal: properly ground the grounding terminal in compliance to 200V class type
three grounding. (The 400V class type is special grounding.)
External wiring should be carried out in accordance with following requirement. Check and
reassure the wiring is correct after the wiring is complete.
(Do not utilize the control circuitry buzzer to check the wiring).
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