Selection Of The Motor Cable; Interconnection Of The Motor; Figure 21: Interconnection Of The Motor - KEB COMBIVERT H6 Series Instructions For Use Manual

cONNEcTION Of THE POWER UNIT

4.2.3.2 Selection of the motor cable

Correct selection and wiring of the motor cable is very important for high motor ratings:
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4.2.3.3 Interconnection 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 V
3
PE
U1
W2
Figure 21: Interconnection of the motor
NOTICE
cAUTION
Lower abrasion of the motor bearings by leakage currents
Improved EMC characteristics
Lower symmetrical operating capacities
Less losses by equalizing currents
connection of the motor
Star
V1 W1
U2 V2
Incorrect behaviour of the motor !
The connection instructions of the motor manufacturer are generally valid !
Protect motor against voltage peaks !
Drive converters switch with dv/dt of approx. 5kV/µs at the output.
Voltage peaks can be caused by reflections which endanger the insu-
lation of the motor with motor cable lengths (>15 m). A reduction of the
voltage peaks to protect the motor can be reached by using a motor
choke, a du/dt filter or a sine-wave filter.
400 / 690 V motor
400 V
Delta
3
PE
U1 V1 W1
W2 U2 V2
49