Rockwell Automation 8720MC High Performance Drives Installation Manual - Manual (Page 75)

Publication 8720MC-IN001D-EN-P — December 2002
Connecting Your 8720MC 3-13
Motor Power Cable Shield Terminations
The motor power cable shield must terminate at the drive and where
the cable enters the cabinet to meet CE requirements.
A portion of the cable jacket must be removed at the drive end to
expose the shield braid and leave an appropriate length for each
conductor. The shield must be positioned under the clamp as shown
in the figure below.
Another portion of the cable jacket is removed where the cable enters
the enclosure and a 360° conduit clamp applied (as shown in the
figure below).
Figure 3.6
Motor Power Cable Connection to Drive
1
For examples of shield clamp attachment, refer to the System Design for Control of Electrical Noise Reference
Manual (publication GMC-RM001x-EN-P).
2
If cabinet is painted, remove paint (refer to Figure 1.4 in Chapter 1 for an example).
ATTENTION
!
To avoid hazard of electrical shock, ensure shielded
power cables are grounded at a minimum of one
point for safety.
PE
GRD
PE
GRD
R
(L1)
T
(L3)
S
(L2)
U
(T1)
W
(T3)
V
(T2)
DC
+
DC
-
Cable braid clamped at drive frame of
nearest available bonded cabinet ground
1
8720MC Front View
(C frame shown)
TB1
Enclosure
Three-phase
motor power
with ground
360 ° conduit clamp
1
shield termination
at enclosure
(user supplied)
Braid under clamp
2
2