6.4.3 Recommended type of the motor cable
PE
PE
PE
VU
W
Symmetrical shielded cables are recommended for
high motor power.
• Type of cable: 2XSLCYK-J.
• The protective earth conductor is tripartited and
uniformly placed between the phase lines.
• Compliance with the requirements according to
EN 12502-1...5.
Figure 20: Cross-section type of the motor cable
6.4.4 Connection of the motor
As a standard the connection of the motor must be carried out in accordance with the
following table:
230/400 V motor 400/690 V motor
230 V 400 V 400 V 690 V
Delta Star Delta Star
Table 20: Connection of the motor
The connecting-up instructions of the motor manufacturer are generally valid !
6.4.5 Calculation of the motor voltage
The motor voltage for dimensioning of the drive is depending on the used components.
The mains voltage reduces according to the following table:
Mains choke Uk 4 % Example:
Drive converter open-loop 4 % Closed loop drive converter with mains and motor
choke at a non-rigid supply system:
400 V mains voltage - 15 % = 340 V motor voltage
Drive converter closed-loop 8 %
Motor choke U
k 1 %
Non-rigid supply system 2 %
Table 21: Calculation of the motor voltage
69
ELECTRICAL INSTALLATION
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