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Using instruction of ambitus device for Inverter
Appendix C
Installation instruction:
DC reactor
In order to improve the power factor of Inverter, user could choose
to install DC reactor
Brake unit and braking resistance
If the Inverter used for big-inertia and short-braking time device,
user should choose to install brake unit and braking resistance (15KW
and below has installed inner brake unit).Data of braking resistance
seen to Appendix B.
Output-side filter
Could choose to install loading filter to reduce radiation interference
and induction noise or decrease motor noise and waste.
Thermal relay
When use one Inverter to drive more motors, should increase
installing thermal relay. Please don't install thermal relay when one
Inverter drive one motor (the specification of the thermal relay
should match the rated current of motor).
Motor
When use one Inverter to drive more motors, the capacity of the
Inverter should bigger than total capacity of simultaneous-
operating motors.
Circuit breaker
Between the input power and the main circuit terminals
should install a no-fuse circuit breaker as the power
switch for the Inverter, then the Inverter could
be repaired and maintained conveniently. Please don't
use it as the daily on-and-off switch for the Inverter.
Magnetic contactor
It's unnecessary to install magnetic contactor for
general-use, but recommend it's better to install a
m a g n e t i c c o n t a c t o r t o c u t o ff p o w e r w h e n t h e
Inverter's protection operated. Should install
magnetic contactor if need out-side increase-and-
decrease speed set or restart when power off. But
don't use it as the daily on-and-off switch for the
Inverter.
Input-side AC reactor
Should install AC reactor under the following condition:
The capacity of power transformer is above 500KVA,
and the capacity of power transformer is more than
decuple capacity for Inverter.
The unbalance between the three phase output-
voltage of the power transformer.
The crystal brake tube is on-load at the same power.
There is electric capacitor at the side of power which
regulate power factor by controlling on/off.
Input-side filter
When the Inverter working, it will bring harmonic,
which will interfere the surrounding electronic sensitive
device, so please choose to install input-side filter if
there is electronic sensitive device surround the
Inverter (suitable for below 22KW).
Circuit breaker
contactor
reactor
filter
filter
Thermal relay
Motor
installation instruction
Appendix C
Appendix C
