VM1000 Series
‐140‐
Appendix A -Selection of External Electrical Components
A.1 VM1000 External Electrical Connection Diagram
Table A-1 is the lists and instruction of various external electrical components.
Componen
ts Name
Installation Instruction
Air switch
Front-end of
input circuit
The power is disconnected when the downstream
equipment is overcurrent.
Contactor
Between the open
space and the
input side of the
AC drive
In VFD power-on or power-off operation, it should be
avoided operating ON/OFF frequently (less than
twice per minute) or starting operations through direct
contact.
AC input
reactor
Input side of AC
drive
Improving the power factor at input side;effectively
eliminating high harmonics at the input side;
preventing from damaging other equipment incurred
by voltage waveform distortion ; eliminating the
imbalance of input current caused by the imbalance
of power phase.
EMC input
filter
Input side of AC
drive
Reducing the external conduction and radiation
interference incurred by VFD; Reducing the the
drive conductive interference from power supply
side to VFD and improving anti-interference
capability of the AC drive.
DC reactor
DC reactor is
external
option,which is
connected
between “+ “and
“P”(applicable
for 30~110kw)
Improving the power factor at input side; improve
the overall efficiency and thermal stability of AC
drive. Effectively eliminate the influence caused by
higher harmonic at input side and reduce the external
conduction and radiation interference.
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