Delta VFD11AMS21AFSHA, User Manual

Page: 50 / 445

Chapter 7 Optional Accessories

MS300
(High Speed Model)
7-7
7-4 AC/DC Reactor
Installing an AC reactor in the input side of AC motor drive can increase line impedance, improve
power factor, reduce input current, and reduce interference generated from motor drive. Also momentary
voltage surges or abnormal current spikes are reduced. For example, when the mains power capacity is
higher than 500 kVA, or a switching capacitor bank is used, momentary voltage and current spikes may
damage the AC motor drive’s internal circuit. An AC reactor in the input side of the AC motor drive
protects it by suppressing surges.
Installation
An AC input reactor is installed in series with the mains power to the three input phases R S T as
shown below:
R
/L1
S
/L2
T
/L3
U/
T
1
V/
T
2
W/
T
3
E
+
B1
B2
- E
M
AC reac tor
(input s ide)
Power inputs
Connecting an AC input reactor
230V / 1-Phase Heavy Duty
230V / 50~60Hz MS Series Heavy Duty Input AC Reactor
Model
Rated Current
ND / HD (A
rms
)
Saturation
ND / HD
Current (A
rms
)
Input/ Output
Reactor (mH)
Input Reactor
Delta Part #
DC Reactor
(mH)
DC Reactor
Delta Part #
VFD7A5MS21ANSHA
VFD7A5MS21ENSHA
VFD7A5MS21AFSHA
7.5 15 2.662 DR011D0266 2.662 DR011D0266
VFD11AMS21ANSHA
VFD11AMS21ENSHA
VFD11AMS21AFSHA
11 22 1.722 DR017D0172 1.722 DR017D0172
230V / 3-Phase Heavy Duty
230V / 50~60Hz MS Series Heavy Duty Input AC Reactor
Model
Rated Current
ND / HD (A
rms
)
Saturation
ND / HD
Current (A
rms
)
Input/ Output
Reactor (mH)
Input Reactor
Delta Part #
DC Reactor
(mH)
DC Reactor
Delta Part #
VFD7A5MS23ANSHA
VFD7A5MS23ENSHA
7.5 15 1.585 DR008A0159 3.66 DR008D0366
VFD11AMS23ANSHA
VFD11AMS23ENSHA
11 22 0.746 DR017AP746 2.662 DR011D0266
VFD17AMS23ANSHA
VFD17AMS23ENSHA
17 34 0.507 DR025AP507 1.722 DR017D0172