Chapter3 Keyboard Operation and Electrical Wiring SVF-MN Series Frequency Inverter Operation Manual
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3.2.2 Instructions for External Electrical
Components
Table 3-2 Instructions for SVF-MN series VFD external electrical
components
Accessory
Name
Installation Site Function
Air switch
MCCB
Front of input
circuits
When downstream devices is over
current, breaking the power.
Contactor
Between the air
switch and the
input side of
frequency
inverter
The frequency inverter power on and
off, should avoid frequently operating
through the contactor or doing direct
start-up operation.
AC
Reactor
Input side of
the frequency
inverter
1) Improve the power factor of input
side
2) Suppress the higher harmonics of
the input side effectively; prevent
damage of the other equipment
because of the voltage waveform
distortion.