15
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Precautions for peripheral applications:
Power source:
z Make sure the voltage applied is correct to avoid damaging
the inverter.
z A molded-case circuit breaker must be installed between
the AC source and the inverter.
Molded-case circuit breaker:
z Use a molded-case circuit breaker that conforms to the
rated voltage and current of the inverter to control the
power ON/OFF and protect the inverter.
z Do not use the inverter as the switch for run/stop switching.
Leakage breaker:
z Install a leakage breaker to prevent error operation caused
by electric leakage and to protect operators.
Magnetic contactor:
z Normal operations do not need a magnetic contactor. But a
contactor has to be installed when performing functions
such as external control and auto restart after power
failure, or when using brake controller.
z Do not use the magnetic contactor as the run/stop switch
of the inverter.
Reactor for power improvement:
z When inverters below 200V/400V 15KW are supplied with
high capacity (above 600KVA) power source, a reactor
can be connected to improve the power performance.
Input noise filter:
z A filter must be installed when there are inductive load
around the inverter.
Inverter:
z Input power terminals L1, L2, and L3 can be used in any
sequence regardless of phases.
z Output terminals T1, T2, and T3 are connected to U, V,
and W terminals of the motor. If the motor is reversed while
the inverter is forward, just swap any two terminals of T1,
T2, and T3.
z To avoid damaging the inverter, do not connect the input
terminals T1, T2, and T3 to AC power.
Connect the ground terminal properly. 200V class: Ground
to 100Ω or less, 400V class: Ground to 10Ω or less.
Molded-case
Magnetic
contactor
AC reactor
for power
Input noise
filter
Ground
Three-phase
cage motor
2 inverte
Ground
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