Rockwell Automation 7000L PowerFlex Medium Voltage AC Drive (C Frame) - Classic Control - Manual (Page 354)

6-10 Component Definition and Maintenance
7000L-UM300I-EN-P – June 2013 7000 “C” Frame
Metal-oxide varistors (MOV) are part of the Transient Suppression
Network located within the connection cabinet. The PWMR drive
contains one varistor panel while the 18-pulse drive contains three.
1. Ensure there is no power to the equipment.
A T T E N T I O N A T T E N T I O N To prevent electrical shock, ensure the main
power has been disconnected before working on
the transient suppression network. Verify that all
circuits are voltage free using a hot stick or
appropriate voltage-measuring device. Failure to
do so may result in injury or death.
2. Observe the locations of the connecting links.
3. Detach the connecting links by removing the screws.
4. Using a screwdriver remove the screws at the base.
5. Replace the MOV (polarity is not an issue).
6. Continue by replacing the screws and connecting links.
I M P O R T A N T I M P O R T A N T Each MOV panel is grounded. Ensure that one
MOV (see Figure 6.7 for location) is connected
to the grounding lead
The number of capacitors will vary depending on the system voltage.
1. Ensure there is no power to the equipment.
A T T E N T I O N A T T E N T I O N To prevent electrical shock, ensure the main power
has been disconnected before working on the
capacitor. Verify that all circuits are voltage free
using a hot stick or appropriate voltage-measuring
device. Failure to do so may result in injury or
death.
Metal-Oxide Varistor
Replacement
Grounding Network
Capacitor Replacement