Delta C2000 Series User Manual page 132

Following table is the THDi value of Delta motor drive matching AC/DC reactor:
Drive Spec.
No AC/DC
Reactor
reactor
Spec.
5th 73.3%
7th 52.74%
11th 7.28%
13th 0.4%
THDi 91%
Note: THDi may have some difference due to different installation conditions (like wires or motors) and environment.
AC Output reactor
Installing an AC reactor on the input side of an AC motor drive can increase line impedance, improve
the power factor, reduce input current, and reduce interference generated from the motor drive. It also
reduces momentary voltage surges or abnormal current spikes. For example, when the main power
capacity is higher than 500 kVA, or when using a switching capacitor bank, momentary voltage and current
spikes may damage the AC motor drive's internal circuit. An AC reactor on the input side of the AC motor
drive protects it by suppressing surges.
Installation
Install an AC input reactor in series with the three output phases U V W to Motor as shown below:
Models without built-in DC reactor
3% input AC 5% input AC
reactor reactor
38.5% 30.8%
15.3% 9.4%
7.1% 6.13%
3.75% 3.15%
43.6% 34.33%
Wiring of AC output reactor
Chapter 7 Optional AccessoriesC2000
Models with built-in DC reactor
No AC/DC
4% DC reactor
reactor
25.5% 31.16%
18.6% 23.18%
7.14% 8.6%
0.48% 7.9%
38.2% 42.28%
7-25
3% input AC 5% input AC
reactor reactor
27.01% 25.5%
9.54% 8.75%
4.5% 4.2%
0.22% 0.17%
30.5% 28.4%
Table 7-33
Figure 7-8