Rockwell Automation AK DBU - Dynamic Braking Unit 600/690 VAC - Manual (Page 35)

CE Conformity B-5
Power Connections between Enclosures
(
see Figure B.1 and Figure B.3 )
• The power cables between the enclosures housing of the inverter, the
DBU and the brake resistor shall be 3-wire shielded cable (+, -, and
earth conductor green/yellow) or run in a separate steel conduit.
• Between each enclosure and the protective earth (PE) of the line
input, an uninterrupted connection (green/yellow conductors) must
be provided to ensure correct grounding of the equipment.
• The braid of shielded cables must be connected to the enclosures by
the use of suitable EMC type cable glands.
Figure B.1 Specification for shielded cable
Cable Glands
• Use suitable EMC-tested cable glands only.
• The conductivity of the shield to earth connection is ensured by
laying the braid over a plastic cone which will press it to the inner
side of the gland when mounted.
• It is important that the connection area is 360 degree around the
cone.
• The cable glands provide pull-relief through the cable jacket.
Stranded copper wire
Plastic insulation
Inner plastic sheath
Compact screen of galvanized
(tinned) copper or steel braid
Outer plastic jacket