Grounding System; Installing Racks In Cabinets; External Cables - ABB ETL600 Instruction Manual

ABB Switzerland Ltd
pedestal or as a suite of cabinets on a platform to facilitate cleaning of
the floor and routing of cables.
6.4.1.

Grounding system

The grounding system must go out radially from the station ground rail.
On no account may there be any loops that would permit circulating
ground currents.
Every cabinet must have its own ground conductor (gauge > 25 mm
connected by adequately rated cable lugs to the station ground rail.
The ground connection to the cabinet shall be clearly visible and made
to the designated ground terminal.
For safety reasons, looping ground conductors to or from neighboring
cabinets or other equipment is not permissible.
6.4.2.

Installing racks in cabinets

While being installed, the equipment must be switched off and no
external connections may be made to it.
Pay attention when determining the cabinet layout that air can circulate
freely around the equipment and overheating cannot take place. To
this end, sufficient space as shown in the following photographs must
be left between the racks.
6.4.3.

External cables

Some cables are shielded. As shown in the following photographs, the
shields must be earthed at both cable ends using the shield clamps
supplied with the cables. Use plastic binders to fix the position of the
cables so that the shield clamps are not exposed to high mechanical
forces caused by the cables.
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1KHW001489-EN
November 2005
ETL600
Assembly and Installation
2
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