Specifications

Chapter 3 Mechanical and Electrical InstallationVFD‐G7 Series Frequency Inverter
Operation Manual

29
Name
Install
Location
Function
Contactor
Between the
air switch
and the input
of frequency
inverter
The frequency inverter power on and off, should
avoid frequently operating by the contactor or
doing direct start-up operation.
AC Reactor
Input side of
the
frequency
inverter
1) Improve the input power factor of the drive
2) Suppress the high-order harmonics of the input
side; prevent the other equipment damage for the
voltage waveform distortion.
Input EMC
Filter
Input side of
the
frequency
inverter
1) Reduce the frequency inverter external
conduction and radiation disturbance.
2) Reduce interference of conduction flowing
from the power to the drive, and improve the
anti-interference ability of the drive.
DC Reactor
Between(+)
and P of the
main circuit
terminals
1)improve the input power factor of the drive
2) Improve efficiency and thermal stability of the
whole frequency inverter.
3) Suppress the high-order harmonics of the input
side; reduce external conduction and radiation
disturbance.