Conducted Disturbances Depending On The Motor Line Length At Ac Supply - KEB COMBIVERT G6 series Installation Manual

Connection of the Power Unit
Size
13
14
15

3.2.2.3 Conducted disturbances depending on the motor line length at AC supply

The maximum motor line length is depending on the capacity of the motor cable as well as
on the EMC emitted interference. The following data apply for operation under nominal rating
conditions.
Motor cable
(standard)
Size
13
14
15
The line length can be extend significant by using motor chokes or filters. KEB recom-
mends the use of motor chokes or filters for a line length upto 50 m. Motor chokes or
filters are absolutely necessary upto 100 m.
3.2.2.4 Motor cable cross-section
Size
13
14
15
3.2.2.5 Interconnection of the motor
The connecting-up instructions of the motor manufacturer are always generally va-
lid !
Protect motor
against voltage
3.2.2.6 Terminal strip X1B motor connection
Terminal strip X1B
GB - 18
Motor cable (standard)
100 m
Max. motor line length shielded
in accordance with EN 61800-3
Category C1
Motor cable
(low capaci-
tance)
25 m 50 m
Recommended minimum cross section of the motor line for rated power and
a cable length of upto 100 m (copper)
Inverters switch at the output with du/dt ≤ 5kV/µs. Voltage peaks
that endanger the insulation system at the motor can occur espe-
cially in case of long motor cables (> 15 m).
peaks ! A motor choke, a dv/dt-filter or sine-wave filter can be used for
protection of the motor.
Name Function
Category C2
Motor cable
(standard)
50 m
3 x 4 mm² Phase + 1 x 4 mm² PE
3 x 6 mm² Phase + 1 x 6 mm² PE
Motor cable (low capacitance)
200 m
Motor cable
(low capaci-
tance)
100 m
Cross-section
max. leakage
current
(at f ≤100 Hz)
N
< 5 mA
Tightening
torque