58 Planning the electrical installation
Routing the cables
Route the motor cable away from other cable routes. Motor cables of several drives
can be run in parallel installed next to each other. It is recommended that the motor
cable, input power cable and control cables be installed on separate trays. Avoid long
parallel runs of motor cables with other cables in order to decrease electromagnetic
interference caused by the rapid changes in the drive output voltage.
Where control cables must cross power cables make sure they are arranged at an
angle as near to 90 degrees as possible. Do not run extra cables through the drive.
The cable trays must have good electrical bonding to each other and to the
grounding electrodes. Aluminum tray systems can be used to improve local
equalizing of potential.
A diagram of the cable routing:
Control cable ducts
90°
min 500 mm (20 in.)
Motor cable
Input power cable
Control cables
min 200 mm (8 in.)
min 300 mm (12 in.)
Motor cable
Power cable
Drive
24 V24 V
230 V
Lead 24 V and 230 V (120 V) control
cables in separate ducts inside the
cabinet.
Not allowed unless the 24 V cable is
insulated for 230 V (120 V) or
insulated with an insulation sleeving
for 230 V (120 V).
(120 V)
230 V
(120 V)
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