CDE360 Vector Control AC Drive Chapter 3 Mechanical and Electrical Installation
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3.2.1 Instructions of Peripheral Electrical Components
Table 3- 2 Instructions of peripheral electrical components of CDE360 AC drive
Name
Installation
Position
Function Description
Breaker
The front end of
the input circuit
The power system can be protected when the short circuit happens.
Contactor
Between the
breaker and the
AC drive
Start and stop the AC drive.Neither 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.
Input AC
reactor
Input side of the
AC drive
1) Improve the power factor of the input side.
2) Eliminate the higher harmonics of the input side effectively and
prevent other devices from being damaged due to the distortion
of the voltage waveform.
3) Eliminate the input current unbalance due to the unbalance
between the power phases.
Input
Noise filter
Input side of the
AC drive
1)
Reduce the external conduction and radiation interference of the AC drive.
2)
Decrease the interference flowing from the AC drive to the power system.
DC
reactor
Between the terminal
P+ and terminal P1 of
the AC drive
1) Improve the power factor of the input side.
2) Eliminate the higher harmonics of the input side effectively and
decrease the external conduction and radiation interference.
Output AC
reactor
Close to the
output side of the
AC drive
The output sides of the AC drive generally have much higher
harmonics. When the motor is far from the AC drive, there is much
distributed capacitance in the circuit. Certain harmonics may cause
resonance in the circuit and bring about the following two impacts:
1) Degrade the motor insulation performance and damage the
motor in the long run.
2) Generate large leakage current and cause frequent AC drive
protection trips.
3.2.2 Selection Guidance of Peripheral Electrical Components
Note: Voltage and power classes is the only consideration in peripheral electrical parts selection.
