Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) - ForGe Control (PanelView 550) - Manual (Page 38)

38 Rockwell Automation Publication 7000-UM151E-EN-P - January 2013
Chapter 3 Component Definition and Maintenance
When you disconnect the surge arrester from drive, the arrester may retain a small
amount of static charge. As a precautionary measure, install a temporary ground
on the line-end of the arrester and discharge the stored energy. Remove
temporary ground before reinstalling the arrester. To avoid electrical shock when
removing the arrester from service, treat it as fully energized until you disconnect
both the line and ground leads.
Field Test and Care
No field testing is necessary. The arresters do not require special care. At very
dusty sites, however, you should clean the arrester when cleaning the entire drive.
Replacing Output Grounding Network Capacitors
PowerFlex 7000 18-pulse and select AFE drives come with an installed grounding
network.
The number of capacitors varies depending on the system voltage.
1. Isolate and lock out all power to the drive.
2. Note the position of the leads.
3. Remove the 6.4-mm (¼ inch) hardware and disconnect the leads
connected to the terminals.
4. Four brackets secure the capacitor. Loosen the four screws at the base of the
brackets and lift the capacitor out.
5. Place the new capacitor and tighten the screws securely.
6. Replace the ring lugs and 6.4-mm (¼ inch) hardware (see
Figure 20 ).
ATTENTION: To prevent electrical shock, disconnect the main power
before working on the drive. 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.
IMPORTANT The maximum torque for the capacitor terminal is 3.4 Nm (30 lb-in).