Rockwell Automation Publication 7000-UM202H-EN-P - November 2023 41
Chapter 2 Power Component Definition and Maintenance
Figure 33 - Surge Arresters (Heatpipe Model)
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 the arrester 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 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.
To access the grounding network in an arc resistant drive, barriers
behind the swing-out LV compartment require removal.
2. Note the position of the leads.
3. Remove the 6.4 mm (¼ in.) hardware and disconnect the leads connected
to the terminals.
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.
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