![Allen-Bradley Kinetix 350 User Manual Download Page 56](http://html1.mh-extra.com/html/allen-bradley/kinetix-350/kinetix-350_user-manual_2900192056.webp)
56
Rockwell Automation Publication 2097-UM002D-EN-P - April 2017
Chapter 4
Connect the Kinetix 350 Drive System
This example illustrates grounded three-phase power that is wired to single-
phase Kinetix 350 drives when phase-to-phase voltage exceeds drive
specifications.
A neutral must be connected when single-phase drives are attached to a three-
phase isolating transformer secondary. It is not necessary that all three-phases
be loaded with drives, but each drive must have its power return via the neutral
connection
.
Figure 32 - Single-phase Amplifiers (One AC Line Filter Per Drive)
Feeder and branch short circuit protection is not illustrated.
ATTENTION:
Failure to connect the neutral can result in supply voltage
swings at the individual drives. This condition occurs when the neutral point
moves vectorially as a result of load variations that individual drives
experience. The supply voltage swing can cause undervoltage and
overvoltage trips on the drives, and the drive can be damaged if the
overvoltage limit is exceeded.
L1
L2
L3
L1
L2
L1
L2
L1
L2
IPD
L1
N
IPD
L1
N
IPD
L1
N
L1
L2
L1
L2
L1
L2
E
E
E
IPD
L1
L2
IPD
L1
L2
IPD
L1
L2
Bonded Cabinet Ground Bus
Transformer (WYE) Secondary
Ground Grid or Power Distribution Ground
AC Line
Filter
AC Line
Filter
AC Line
Filter
Kinetix 350 Drives
(System A)
Single-phase AC Input
Grounded
Neutral
Grounded Neutral
Kinetix 350 Drives
(System A)
Single-phase AC Input
Kinetix 350 Drives
(System A)
Single-phase AC Input
M1
Contactor
Input Fusing
2097-V31PR
x
-LM
2097-V33PR
x
-LM
IMPORTANT
An AC line filter for each drive is the preferred configuration and required for
CE compliance.