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22
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8000B Series
2.2.4 Descriptions of External Electrical Parts
Name Mounting Location Function
Circuit
Breaker
Front end of input circuit
Disconnect the power supply when the backward
equipment is over current.
Contactor
Between the circuit
breaker and inverter
input side
Po we r O N /O FF o f i nve r ter. D o n ot u se t he
contactor as the switch of inverter. Otherwise, it
may cause damage to the inverter.
AC Reactor
at the Input
Side
Input side of inverter
1. Improve the power factor of the input side.
2. Eliminate the harmonic wave at the input side
ef fectively and prevent other equipment from
damage.
3. Eliminate the input current unbalance caused by
unbalance between the power phases.
EMC Input
Filter
Input side of inverter
1. Reduce the external conduction and radiation
interference of inverter.
2. Decrease the conduction interference flowing
from the power end to the inverter and improve the
anti-interference capacity of the inverter.
DC Reactor
Additional parts of
8000B series inverter
1. Improve the power factor at the input side.
2. Improve the whole ef ficiency and t hermal
stability of the inverter.
3. Eliminate the impact of higher harmonics at the
input side on the inverter and reduce the external
conduction and radiation interference.
AC Reactor
at the
Output Side
Between inverter output
side and motor. Close to
inverter.
The inver ter output side generally has higher
harmonics. When the motor is far from inverter,
since there are many distributed capacitors in the
circuit, certain harmonics may cause resonance in
the circuit and bring the following two impacts:
1. Degrade the motor insulation performance and
damage the motor when running for long time.
2. Generate large leakage current and cause
frequent inverter protection.
Generally, installation of output AC reactor is
recommended when the distance between inverter
and motor exceeds 50m.
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