device
Stand-Alone option
Built-in PCB option
M
Fig. 7-1 Option configurations
Table 7-1
Item Type Function
Main circuit wiring devices
Breaker for
wiring (MCCB)
or Fuse
Select a device that
matches the inverter
rating. (Table 7-2.)
Always install this device to protect the wiring of the inverter
and peripheral devices.
Magnetic
contactor (MC)
Select a device that
matches the inverter
rating. (Table 7-2.)
Install this device to provide an operation interlock.
When using the DBR unit, always install this device to protect
the DBR. (Refer to Fig. 2-4.)
Stand-alone options
ACL ACR-••••
(Refer to Table 7-2.)
If the capacity of the inverter's power supply transformer
exceeds 10 times the inverter unit capacity, always install this
device to protect the inverter. (Balance with power supply) This
is also effective in improving the power factor of the inverter
input and in suppressing the current high harmonics. The power
factor will be approx. 0.9.
DCL DCR-• • • •
(Refer to Table 7-2.)
Install this device to improve the power factor of the inverter
input.
This is also effective in creating a balance with the power
supply as the ACL. The power factor will be approx. 0.9.
Noise filter PR-• • • •
(Refer to Table 7-2.)
This device suppresses the electromagnetic noise generated by
the inverter.
The electromagnetic noise is the radiation of electromagnetic
waves in the radio frequency bands and that conveyed to the
power supply wires. Mounting of this device is recommended
for creating a balance with the peripheral devices of the
inverter.
DBR unit
U2KV23DBU-• •
(Refer to Table 7-2.)
This is used when the motor is to be stopped with dynamic
braking.
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