Electrical Installation; Grounding The Drive - ABB ACS255 User Manual

5. Electrical Installation

5.1. Grounding the Drive

This manual is intended as a guide for proper installation. ABB Drives Ltd cannot assume responsibility for the compliance or the
non-compliance to any code, national, local or otherwise, for the proper installation of this drive or associated equipment. A
hazard of personal injury and/or equipment damage exists if codes are ignored during installation.
This ACS255 contains high voltage capacitors that take time to discharge after removal of the main supply. Before working on the
drive, ensure isolation of the main supply from line inputs. Wait ten (10) minutes for the capacitors to discharge to safe voltage
levels. Failure to observe this precaution could result in severe bodily injury or loss of life.
Only qualified electrical personnel familiar with the construction and operation of this equipment and the hazards involved should
install, adjust, operate, or service this equipment. Read and understand this manual and other applicable manuals in their entirety
before proceeding. Failure to observe this precaution could result in severe bodily injury or loss of life.
5.1.1. Recommended installation for EMC compliance.
 Avoid long parallel
runs of motor cables
with other cables
X
=/>100mm
 Where control cables must cross power
cables make sure they are as near to 90
degrees as possible.
Site Ground Bus-Bar bonded to Metal Back-Panel
panel which is bonded to main power ground.
RFI Filter
 Ensure Filter chassis is making metal-metal contact with
Option
Mounting panel.
 Twisted-Pair shielded cables for analog control and motor
feedback signals.
Whenever possible use Shielded motor cables-
maintaining shield as far as possible along the cable.
U V W
360° bonding
EMC cable gland
(Best-Practice)
(Shield to Motor
Chassis)
PE
U V W
Metal Back-Panel
PE
19