Filter
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CAUTION: Do not stop operation by switching OFF electromagnetic contactors on the primary or
secondary side of the inverter.
When there has been a sudden power failure while an operation instruction is active, then the
unit may restart operation automatically after the power failure has ended. If there is a
possibility that such an occurrence may harm humans, then install an electromagnetic contactor
(Mgo) on the power supply side, so that the circuit does not allow automatic restarting after the
power supply recovers. If the optional remote operator is used and the retry function has been
selected, this will also cause automatic restarting when a Run command is active. So, please be
careful.
CAUTION: Do not insert leading power factor capacitors or surge absorbers between the output
terminals of the inverter and motor.
When there has been a sudden power failure while an operation instruction is active, then the
unit may restart operation automatically after the power failure has ended. If there is a
possibility that such an occurrence may harm humans, then install an electromagnetic contactor
(Mgo) on the power supply side, so that the circuit does not allow automatic restarting after the
power supply recovers. If the optional remote operator is used and the retry function has been
selected, this will also cause automatic restarting when a Run command is active. So, please be
careful.
CAUTION: MOTOR TERMINAL SURGE VOLTAGE SUPPRESSION FILTER
(For the 400V CLASS)
In a system using an inverter with the voltage control PWM system, a voltage surge caused by
the cable constants such as the cable length (especially when the distance between the motor and
the inverter is 10m or more) and cabling method may occur at the motor terminals. A dedicated
filter of the 400V class for suppressing this voltage surge is available. Be sure to install a filter in
this situation.
Power
Input
Ground fault
interrupter
L1, L2, L3
Inverter
U, V, W
Motor
PCS
FW
Power
Input
Ground fault
interrupter
L1, L2, L3
Inverter
U, V, W
Motor
Surge absorber
Leading power
factor capacitor
GND lug
xi
xi