274 ACS550 User’s Manual
Technical data
Grounding and routing
Motor cable shielding
Motor cables require shielding using conduit, armored cable or shielded cable.
• Conduit – When using conduit:
– Bridge joints with a ground conductor bonded to the conduit on each side of
the joint.
– Bond conduit run to the drive enclosure.
– Use a separate conduit run for motor cables (also separate input power and
control cables).
– Use a separate conduit run for each drive.
• Armored cable – When using armored cable:
– Use six-conductor (3 phases and 3 grounds), type MC continuous corrugated
aluminium armor cable with symmetrical grounds.
– Armored motor cable can share a cable tray with input power cables, but not
with control cables.
• Shielded cable – For shielded cable details, see section Motor cable
requirements for CE & C-Tick compliance on page 274.
Grounding
See section Ground connections on page 266.
For CE compliant installations and installations where EMC emissions must be
minimized, see section Effective motor cable screens on page 275.
Drive’s motor connection terminals
The drive’s motor and input power terminals have the same specifications. See
section Drive’s power connection terminals on page 268.
Motor cable requirements for CE & C-Tick compliance
The requirements in this section apply for CE or C-Tick compliance.
Minimum requirement (CE & C-Tick)
The motor cable must be a symmetrical three conductor cable with a concentric PE
conductor or a four conductor cable with a concentric shield, however, a symmetrical
constructed PE conductor is always recommended. The following figure shows the
minimum requirement for the motor cable screen (for example, MCMK, NK Cables).
Insulation jacket Copper wire screen
Cable core
Inner insulation
To Next Page
Loading...
