SAJ 8000m Series, Руководство пользователя

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8000m Series
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2.1.5 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
Power ON/OFF of inverter. Do not use the
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 effectively 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.
AC Reactor
at the
Output Side
Between inverter output side
and motor. Close to inverter.
The inverter 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.
2.1.6 Table of Recommended Circuit Breaker, Contactor and Wire