Rockwell Automation Allen-Bradley 1305-AA02A, Руководство по установке

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Power Distribution 2-15
Multi-Drive Protection
Multiple drives on a common power line should each have their own line
reactor. Individual line reactors provide filtering between each drive to
provide optimum surge protection for each drive. However, if it is
necessary to group more than one drive on a single AC line reactor, use the
following process to verify that the AC line reactor provides a minimum
amount of impedance:
1. In general, up to 5 drives can be grouped on one reactor.
2. Add the input currents of the drives in the group.
3. Multiply that sum by 125%.
4. Use publication 1321-2.0 to select a reactor with a maximum continuous
current rating greater than the multiplied current.
5. Verify that the impedance of the selected reactor is more than 0.5%
(0.25% for drives with internal inductors) of the smallest drive in the group
by using the formulas below. If the impedance is too small, select a reactor
with a larger inductance and same amperage, or regroup the drives into
smaller groups and start over.
L is the inductance of the reactor in henries and f is the AC line frequency
I 3
V
Z
rating input
line - line
drive
.
=
f L
. . .
Π
2 = Z
reactor