Rockwell Automation 1557 MEDIUM VOLTAGE AC DRIVE - Manual (Page 261)

TROUBLESHOOTING 10-19
1557-UM050F-EN-P – June 2013
Checking Clamp Force
Clamps should be periodically tested to determine that the required forces are being exerted.
SNUBBER DIODE
There is a tabwasher underneath the nylon insert locknut. The tabwasher should just be able to turn with
finger touch (see Figure 10.1).
Figure 10.1
– Checking Clamp Force – Snubber Diode
Tab washer to be
rotated with finger
touch
Insulation cups
Never Rotate
this nut