Rockwell Automation Publication 7000L-UM301F-EN-P - March 2020 277
Component Definition and Maintenance Chapter 5
Field Test and Care
No field testing is necessary. The arresters do not require special care. However at
very dusty sites, it is suggested to clean the arrester when the whole drive is
cleaned.
Output Grounding Network
Capacitor Replacement
PowerFlex 7000 18 Pulse and some AFE drives will come with a grounding
network installed.
The number of capacitors will vary depending on the system voltage.
1. Ensure there is no power to the equipment.
2. Note the position of the leads.
3. Remove the 6.4-mm (1/4 inch) hardware and disconnect the leads
connected to the terminals.
4. Four brackets are used to 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 (1/4 inch) hardware. (See Figure 229
)
When the surge arrester is disconnected from MV, it is possible that a
small amount of static charge is retained by the arrester. As a
precautionary measure, install a temporary ground on the line-end of
the arrester and discharge the stored energy. Remove temporary
ground before the arrester is reinstalled. To avoid electrical shock when
removing the arrester from service, consider it to be fully energized
until both the line and ground leads are disconnected.
ATTENTION: 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.
The maximum torque for the capacitor terminal is 3.4 Nm (30 lb-in).
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