Rockwell Automation 20Y PowerFlex Active Front End - Manual (Page 38)

38 Rockwell Automation Publication 20Y-UM001E-EN-P - July 2014
Chapter 1 AFE in IP20 2500 MCC Style Enclosure—Installation/Wiring
Figure 17 - Routing Areas for AC Input, Ground, and DC Bus Output Wiring for AFE
Frame 13 in IP20 2500 MCC Style Enclosure
Disconnecting Common
Mode Capacitors Frame 10 LCL Filter
The Frame 10 AFE LCL Filter contains common mode capacitors that are
referenced to ground. To guard against AFE damage, these devices must be
disconnected
if the AFE is installed on a high resistance grounded distribution
system, or an ungrounded distribution system where the line-to-ground voltages
on any phase exceed 125% of the nominal line-to-line voltage.
To access the common mode capacitors, the LCL Filter must be removed from
the enclosure. To remove the Frame 10 AFE LCL Filter from the IP20 2500
MCC Style enclosure, see the instructions in the PowerFlex Active Front End—
Frame 10 Hardware Service Manual, publication 20Y-TG001.
To disconnect the common mode capacitors, remove the jumpers shown in
Figure 18 . For more information on ungrounded system installation, see Wiring
and Grounding Guidelines for Pulse Width Modulated (PWM) AC Drives,
publication DRIVES-IN001.
Area for routing AC input
and ground (PE) connections
Shaded areas for routing DC bus
output connections—on either the
left or right side of the enclosure
When the side cover plate is removed
for DC bus routing, always use the
Barrier Kit SK-Y1-MCCBARRIER to
maintain proper air flow in the AFE
enclosure and prevent overheating.
ATTENTION: To avoid an electric shock hazard, verify that the voltage on the bus
capacitors has discharged completely before removing or installing jumpers.
Check the DC bus voltage between the +DC and –DC terminals, between the
+DC terminal and the chassis, and between the –DC terminal and the chassis.
The voltage must be zero for all three measurements.