User Manual

Installation / mounting
8.4 Soft starter with line contactor (type of coordination 1)
SIRIUS 3RW30 / 3RW40
64 Manual, 10/2010, 535199502000 DS 03
8.4 Soft starter with line contactor (type of coordination 1)
If electrical isolation is specified, you can install a motor contactor between the soft starter
and the motor starter protector.
L2
L1
L3
PE
3/N/PE~ 50 Hz 400 V
4
4
4
0
8
: 8 9
:
9
8
: 8 9
:
9
Figure 8-2 Block diagram of a feeder with an optional main / line contactor
Note
For the component design, refer to chapter Technical data (Page 127).
NOTICE
If a main or line contactor is used, it should not be connected between the soft starter and
the motor. The soft starter could otherwise indicate a "Missing load voltage" fault in case of
a start command and delayed connection of the contactor.