YASKAWA L1000A - Connecting an AC Reactor or a DC Link Choke

8.5 Installing Peripheral Devices
YASKAWA ELECTRIC SIEP C710616 38F YASKAWA AC Drive - L1000A Technical Manual 371
Peripheral Devices & Options
8
◆ Connecting an AC Reactor or a DC Link Choke
■ Placement
When connecting to a power supply transformer with greater than 600 kVA capacity, or when switching a phase advance
capacitor, large peak current can flow through the input power supply circuit and damage converter components in the
drive.
As a preventive measure, install an AC reactor or a DC link choke to the input side of the drive. Installing an AC reactor
or a DC link choke will also help improve the power factor.
Install an AC reactor or a DC link choke if a DC drive or another type of thyristor converter is running from the same
power system, regardless of the power supply conditions shown in Figure 8.22.
Note: A DC link choke is built in to the drive models CIMR-LU20085 to 20415, 40045 to 40605, and 50032 to 50200.
Figure 8.20
Figure 8.22 Installing an AC Reactor or DC Link Choke
■ Connecting an AC Reactor
Figure 8.21
Figure 8.23 Connecting an AC Reactor
A – Power supply C – AC reactor
B – MCCB D – Drive
4000
600
0
60 400
Drive Capacity (kVA)
Power Supply
Capacity (kVA)
Power supply harmonics
AC reactor or DC link choke
required
AC reactor or DC link
choke unnecessary
YEA_T
-
Monly
BA
CD
R/L1 U
V
W
X
Y
Z
S/L2
T/L3
Common_
TMonly
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