Connection Of The Motor; Selection Of The Motor Cable; Cable-Fed Disturbances Depending On The Motor Cable Length At Ac Supply; Motor Cable Length At Operation With Dc Voltage - KEB COMBIVERT S6 Series Instructions For Use Manual

cONNecTION Of THe POWer UNIT

4.2.6 connection of the motor

4.2.6.1 Selection of the motor cable

The correct cabling as well as the motor cable plays an important part in case of low
power in connection with long motor cable lengths. Ferrite cores and low-capacitance
cables (phase/phase < 65 pF/m, phase/screen < 120 pF/m) at the output have the fol-
lowing effects:
•
•
•

4.2.6.2 Cable-fed disturbances depending on the motor cable length at AC supply

The maximum motor cable length is depending on the capacity of the cable as well as
on the EMC emitted interference. The following data apply for operation under nominal
rating conditions.
Table 38:

4.2.6.3 Motor cable length at operation with DC voltage

The maximum motor cable length at DC operation is basically dependent on the capaci-
ty of the motor cable. The internal filter is not active at DC operation. External measures
must be taken if necessary. The following data apply for operation under nominal rating
conditions.
Table 39:
60
longer motor cable lengths
less abrasion of the motor gearbox by leakage currents
better EMC properties (reduction of the common-mode output currents to earth)
Voltage class Device size
230 V
1-phase
400 V
3-phase
Maximum motor cable length at AC supply
The use of motor chokes or filters can significantly increase the cable length.
KEB recommends the use of motor chokes or filters for a line length upto 50 m.
Motor chokes or filters are absolutely necessary upto 100 m.
Voltage class Device size
230 V
1-phase
400 V
3-phase
Maximum motor cable length at DC operation
Max. motor cable length (shielded)
in accordance with
Motor cable / m (low-capacitance)
07
09
07
09
10
Motor cable / m (low-capacitance)
07
09
07
09
10
EN 61800-3
category c2
30
50
50
50