Mechanical and Electrical Installation MD280/MD280N User Manual
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Part
Name
Installation
Location
Function Description
unbalanced power phases.
EMC
input filter
Input side of the
inverter
1˅ Reduce the external conduction and radiation interference
of the inverter;
2˅ Reduce the conduction interference flowing from the
power end to the inverter, thus improving the
anti-interference capacity of the inverter.
DC
reactor
MD280 series
inverter of
above 7.5G/11P
adopts DC reactor
as standard
1˅ Improve the power factor of the input side;
2˅ Improve the overall efficiency and thermal stability
of the inverter.
3˅ 3) Effectively reduce the influence of high order harmonics
at the input side on the inverter and reduce the external
conduction and radiation interference.
AC output
reactor
Between the
inverter output
side and the
motor, close to the
inverter
The inverter output side generally has higher harmonic.When the
motor is far from the inverter, since there are many capacitors in
the circuit, certain harmonics will cause resonance in the circuit
and bring in the following results:
1˅ Degrade the motor insulation performance and damage
the motor for the long run
2˅ Generate large leakage current and cause frequent
inverter protection action
3˅ In general, if the distance between the inverter and the
motor exceeds 100 meters, output AC reactor shall be
installed.
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