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84 Guidelines for planning the electrical installation
Routing the cables
General guidelines – IEC
￭
•
Route the motor cable away from other cables. Motor cables of several drives can be
run in parallel installed next to each other.
•
Install the motor cable, input power cable and control cables on separate trays.
•
Avoid long parallel runs of motor cables with other cables.
•
Where control cables must cross power cables, make sure that they are arranged at
an angle as near to 90 degrees as possible.
•
Do not run extra cables through the drive.
•
Make sure that the cable trays have good electrical bonding to each other and to the
grounding electrodes. Aluminum tray systems can be used to improve local equalizing
of potential.
The following figure illustrates the cable routing guidelines with an example drive.
3
min. 200 mm (8 in)
2
1
Motor cable
2
Input power cable
3
Control cable
4
Brake resistor or chopper cable (if any)
Continuous motor cable shield/conduit or enclosure for equipment
￭
on the motor cable
To minimize the emission level when safety switches, contactors, connection boxes or
similar equipment are installed on the motor cable between the drive and the motor:
•
Install the equipment in a metal enclosure.
•
Use either a symmetrical shielded cable, or install the cabling in a metal conduit.
•
Make sure that there is a good and continuous galvanic connection in the shield/conduit
between drive and motor.
•
Connect the shield/conduit to the protective ground terminal of the drive and the motor.
min. 300 mm (12 in)
2
min. 300 mm (12 in)
2
90°
1
min. 500 mm (20 in)
3
1
4
4
min. 500 mm (20 in)
3
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