3 Peripheral Devices and Options
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3.1.2 Peripheral Device Descriptions
Peripheral device descriptions
Peripheral Device Mounting Position Function description
Circuit breaker
Between power
supply and
controller
input side
occurs on downstream devices.
Earth leakage circuit breaker (ELCB): Provide protection against
potentially leakage current during controller running to prevent electric
Electromagnetic
contactor
Between air
switch and
controller
input side
Do not start and stop the controller frequently by opening or closing
the contactor (less than twice per minute) nor use it to directly start the
controller.
AC reactor
Controller input
side
Improve the power factor of the input side.
other devices from being damaged due to distortion of the voltage
waveform.
Eliminate the input current unbalance due to power supply inter-phase
unbalance.
Fuse
Between power
supply and
controller
input side
Provide protection against short circuit.
Controller input
side
Reduce conduction and radiation interference generated by the
controller.
controller and improve the anti-interference capacity of the controller.
Regen. resistor Below 37 kW
(F model 45 kW)
Directly use the regen. resistor for models below 37 kW.
Consume regenerative energy during motor deceleration.
Braking Unit
37 kW (F model 45
kW) and above
Use Inovance braking unit MDBUN and recommended regen. Resistor
for models of 37 kW and above.
Consume regenerative energy during motor deceleration.
Output reactor
Between
controller output
side and the
motor, close to
the controller
There are generally a lot of higher harmonics on the controller output
side. When the motor is far from the controller, a subharmonic may
generate resonance in the circuit due to large distributed capacitance in
Degrade the motor insulation performance and damage the motor in
the long run.
Generate large leakage current and cause frequent controller protection
trips.
If the distance between the controller and the motor is greater than 100
m, install an AC output reactor.
dv/dt reactor
On the controller
output side,
close to the
controller
Provide motor insulation protection and reduce the bearing current.
Common-mode
On the controller
output side,
close to the
controller
Reduce the bearing current.
Motor
Controller output
side
Select an appropriate motor according to the recommendation.
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