Planning the electrical installation 45
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 are installed on separate trays. Avoid
long parallel runs of motor cables with other cables to decrease electromagnetic
interference caused by the rapid changes in the drive output voltage.
Where control cables must cross power cables make sure that they are arranged at
an angle as near to 90 degrees as possible.
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 is shown below.
Control cable ducts
Drive
Motor cable
Power cable
min. 300 mm (12 in)
Motor cable
min. 200 mm (8 in)
Input power cable
Control cables
90°
min. 500 mm (20 in)
Lead 24 V and 230 V control cables in
separate ducts inside the cabinet.
Not allowed unless the 24 V cable is
insulated for 230 V or insulated with an
insulation sleeving for 230 V.
230 V24 V 230 V24 V
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