Lenze EVF9383 - Manual (Page 93)

Basic devices in the power range 250 ... 400 kW
Motor connection
5.5
5.5.8
l
5.5−11 EDSVF9383V EN 7.1−04/2012
5.5.8 Motor connection
ƒ To comply with the EMC regulations, Lenze recommends to use
shielded motor cables.
ƒ Shield clamps are not included in the scope of supply.
(
Stop!
The user is responsible for sufficient strain relief!
In order to connect the motor cables of master and slave to the motor, the
outputs must be connected in parallel.
It is important for the parallel connection of the inverter outputs that the
outputs are decoupled by means of an inductance between master and
slave. The length of the motor cables determine whether the inductance of
the cables is sufficient for a decoupling.
2 motor connections ensure sufficient decoupling.
ƒ Decoupling via motor chokes
If the single motor cable length is £ 10 m, master and slave must be
connected in parallel via chokes on the motor side to achieve a sufficient
decoupling between master and slave.
ƒ Decoupling via motor cables
If the single motor cable length is > 10 m, the motor cables of master and
slave can be connected in parallel at the motor to achieve a sufficient
decoupling between master and slave.
Decoupling via motor chokes Decoupling via motor cables
M
3~
PE PE U U V V W W
Z1 Z2
PE
£
10
m PE PE
PE
PE U V W
M
3~
PE U V W
PE
PE
PE
>10
m
9300VEC026 9300VEC008
Fig. 5.5−11 Variants for parallel connection of master and slave (motor side)
Z1, Z2 Motor choke for controller
ELM3−0003H275 EVF9381
ELM3−0002H320 EVF9382
ELM3−0002H410 EVF9383
Parallel connection of master
and slave (motor side)