Omron J7 series, User Manual

Page: 40 / 177

26
Wiring
Chapter 2-2
Countermeasures with
Reactors against
Harmonics Generation DC/AC Reactors
The DC reactor and AC reactor suppress harmonics and currents that change
suddenly and greatly.
The DC reactor suppresses harmonics better than the AC reactor. The DC
reactor used with the AC reactor suppresses harmonics more effectively.
The input power factor of the Inverter is improved by suppressing the
harmonics of the input current of the Inverter.
Connection
Connect the DC reactor to the internal DC power supply of the Inverter after
shutting off the power supply to the Inverter and making sure that the charge
indicator of the Inverter turns off.
Do not touch the internal circuitry of the Inverter in operation, otherwise an
electric shock or burn injury may occur.
Wiring Method With DC Reactor
With DC and AC Reactors
Reactor Effects Harmonics are effectively suppressed when the DC reactor is used with the
AC reactor as shown in the following table.
DC reactor
(optional)
Power supply
MCCB
3-phase 200 V AC
Single-phase 200 V AC
3-phase 400 V AC
VARISPEED
CIMR-J7AZ
DC reactor
(optional)
Power supply
3-phase 200 V AC
Single-phase 200 V AC
3-phase 400 V AC
AC reactor
(optional)
VARISPEED
CIMR-J7AZ
MCCB
Harmonics
suppression method
Harmonic generation rate (%)
5th
harmonic
7th
harmonic
11th
harmonic
13th
harmonic
17th
harmonic
19th
harmonic
23rd
harmonic
25th
harmonic
No reactor 65 41 8.5 7.7 4.3 3.1 2.6 1.8
AC reactor 38 14.5 7.4 3.4 3.2 1.9 1.7 1.3
DC reactor 30 13 8.4 5 4.7 3.2 3.0 2.2
DC and AC reactors 28 9.1 7.2 4.1 3.2 2.4 1.6 1.4