Rockwell Automation AK DBU - Dynamic Braking Unit 600/690 VAC - Manual (Page 34)

B-4 CE Conformity
General
• Earth conductors must be either 16 mm 2 or 50% of the cross section
of the phase conductor whichever is larger.
• The connections between the inverter and the DBU should not
exceed 3 m (10 ft.).
• Signal leads inside the cabinet must be separated from power leads.
• Input power wires on the line side of the drive or EMC filter for the
drive should be widely separated from other wiring inside the cabinet
or should be shielded.
Shielded Cables entering the Cabinet
(
see Figure B.1 and Figure B.2 )
• The shield or screen must be tinned copper braid or tinned steel
braid.
• If shielded cable is not available (limited by the obtainable cross
sections) the individual conductors and protective conductors must
be run in steel conduits or enclosed metal cable ducts also connected
to earth at both ends.
• Signal and control leads (e.g. reference, feedback, relays) must be
shielded cable. The individual conductors must be stranded, but
twisted pairs are not required. The shield must be grounded at both
ends.
• The motor cable shall be 4-wire shielded cable (3 phases and earth
conductor green/yellow) or run in a separate steel conduit.
Wiring Instructions