Rockwell Automation 7000A PowerFlex Medium Voltage AC Drive (A Frame) - ForGe Control - Manual (Page 64)

64 Rockwell Automation Publication 7000A-UM200C-EN-P - June 2014
Chapter 3 Component Definition and Maintenance
Figure 47 - Surge Arresters
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.
Surge Arresters