|Part||Mounting Location||Function Description|
|Power receiving side|
Interrupt the power supply
when overcurrent occurs on
|Contactor||Between MCCB |
and AC drive input side
|Start and stop the AC drive.|
Do not start and stop the
AC drive frequently by switching
the contactor on and off
(less than twice per minute)
nor use it to directly start
the AC drive.
|AC input reactor||AC drive input side|
Reduce the external conduction
and radiation interference of
the AC drive.
• Decrease the conduction
interference flowing from
the power end to the AC drive
and improve the anti-interference
capacity of the AC drive.
|DC reactor|| MD series AC drive|
of 7.5G and above
configured with DC
reactor as standard
• Improve the power factor of the
• Improve the efficiency and thermal
stability of the AC drive.
• Eliminate the impact of higher
harmonics the AC drive input side
and reduce the external conduction
and radiation interference.
|AC output reactor||Between AC drive |
output side and the
motor, close to the AC drive,
The output side of the AC drive generally has much higher harmonics.
When the motor is far from the AC motor, close to the AC drive,there is much distributed capacitance in the circuit and certain harmonics may cause resonance in the circuit, bringing about
the following two impacts:
• Degrade the motor insulation performance and damage the motor in the long
• Generate large leakage current and
AC drive protection trips.
If the distance between the AC drive
and the motor
is greater than 100 m, install an AC
1) Do not install the capacitor or surge suppressor on the output side of the AC drive.
Otherwise, it may cause faults to the AC drive or damage to the capacitor and surge
2) Inputs/Outputs (main circuit) of the AC drive contain harmonics, which may interfere
with the communication device connected to the AC drive. Therefore, install an
anti-interference filter to minimize the interference.
|3）For more details on peripheral devices, refer to related selection manual.|