Frame d, Isolation transformers / line reactors – Rockwell Automation 23P PowerFlex Digital DC Drive User Manual
Page 29
Rockwell Automation Publication 20P-UM001K-EN-P - July 2014
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Installation and Wiring
Chapter 1
Frame D
1.
For any protective cover, loosen, but do not remove, the hexalobular head
screws that secure the cover to the drive frame.
2.
Slide the cover up until the screw heads align with the key holes and lift the
cover off the chassis. The top and bottom most covers are also secured with
screws at the top and bottom of the drive, respectively.
Isolation Transformers / Line
Reactors
When connecting the drive directly to the main distribution system, an isolation
transformer or 3…5% impedance AC line reactor must be used to guard against
system disturbance. If the isolation transformer provides the required 3…5%
impedance, a line reactor is not required.
See Isolation Transformers on page
for a list of recommended isolation
transformers.
See AC Input Line Reactors and AC Input Contactors on page
for a list of
recommended AC line reactors. The type of line reactor that is used depends
upon the following:
•
Current absorbed by the AC input
•
AC input voltage
•
Relative short circuit voltage
•
AC input frequency