GB - 24
Connection Power Unit
2.8.3 Connection of the motor
As standard the connection of the motor must be carried out in accordance with the following
table:
Connection of the motor
230/400 V motor
400/690 V motor
230 V
400 V
400 V
690 V
Delta
Star
Delta
Star
Motor connection in star connection
Motor connection in delta connection
U1
V1
W1
W2
U2
V2
PE
U1
V1
W1
W2
U2
V2
PE
The connecting-up instructions of the motor manufacturer are generally valid !
Protect motor
against voltage
peaks !
Inverters switch with dv/dt of approx. 5kV/µs at the output.
Voltage peaks at the motor which endanger the insulation
system can occur especially in case of long motor lines (>
15 m).
A motor choke, a dv/dt-filter or sine-wave filter can be used
for protection of the motor.
2.8.3.1 Motor cable length for parallel operation of motors
The resulting motor cable length for parallel operation of motors, or parallel installation with
multiple cables arises from the following formula:
resulting motor cable length = ∑single line length x √
Anumber of motor lines
Summary of Contents for COMBIVERT F5
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