Rockwell Automation 7000L PowerFlex 7000 Medium Voltage AC Drive C Frame - Marine - Manual (Page 188)

4-12 Component Definition and Maintenance
7000L-UM302B-EN-P – June 2013 7000 ―C‖ Frame - Marine
Note: 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.
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.
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.
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.
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 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 (¼ inch) hardware.
(See Figure 4.9)
I M P O R T A N T I M P O R T A N T The maximum torque for the capacitor terminal
is 3.4 Nm (30 lb-in).
Output Grounding Network
Capacitor Replacement