Allen-Bradley PowerFlex 20-750-20COMM, Руководство по установке

Страница: 146 / 302

146 Rockwell Automation Publication 750-IN001O-EN-P - October 2014
Chapter 4 Power Wiring
Figure 87 - Typical Grounding
Shield Termination - SHLD
The Shield terminal (see page 149 ) provides a grounding point for the motor
cable shield. It must be connected to an earth ground by a separate continuous
lead. The
motor cable shield should be connected to this terminal on the drive
(drive end) and the motor frame (motor end). Use a shield terminating or EMI
clamp to connect shield to this terminal.
RFI Filter Grounding
Using an optional RFI filter may result in relatively high ground leakage currents.
Therefore, the
filter must only be used in installations with grounded AC
supply systems and be permanently installed and solidly grounded
(bonded)
to the building power distribution ground. Be sure that the incoming supply
neutral is solidly connected (bonded) to the same building power distribution
ground. Grounding must not rely on flexible cables and should not include any
form of plug or socket that would permit inadvertent disconnection. Some local
codes may require redundant ground connections. The integrity of all
connections should be periodically checked. Refer to the instructions supplied
with the filter.
U (T1)
V (T2)
W (T3)
R (L1)
S (L2)
T (L3)
SHLD
PE