Grounding The Outer Shields Of The Control Cables At The Cabinet Lead-Through - ABB ACS880-07C Hardware Manual

76 Electrical installation

Grounding the outer shields of the control cables at the cabinet lead-through

Applicability
This section applies to drives without solid cable conduit plate.
Procedure
Ground the outer shields of all control cables 360 degrees at the EMI conductive cushions
as follows:
1. Loosen the tightening screws of the EMI conductive cushions and pull the cushions
apart.
2. Cut adequate holes to the rubber grommets in the lead-through plate and lead the
cables through the grommets and the cushions into the cabinet.
3. Strip off the cable plastic sheath above the lead-through plate just enough to ensure
proper connection of the bare shield and the EMI conductive cushions.
4. Tighten the two tightening screws so that the EMI conductive cushions press tightly
round the bare shield.
1
3
2
4
Note 1: Keep the shields continuous as close to the connection terminals as possible.
Secure the cables mechanically at the lead-through strain relief.
Note 2: If the outer surface of the shield is non-conductive:
•
Cut the shield at the midpoint of the bare part. Be careful not to cut the conductors or
the grounding wire (if present).
•
Turn the shield inside out to expose its conductive surface.
•
Cover the turned shield and the stripped cable with copper foil to keep the shielding
continuous.
2
1 Tightening screw
2 EMI conductive cushion
3 Strain relief
4 Grommet
5 Lead-through plate
5
1
View from above