Soft Starter With Line Contactor (Type Of Coordination 1) - Siemens SIRIUS 3RW30 Manual

9.3

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.
Figure 9-2
Note
For the component design, refer to chapter Technical data (Page 127).
Note
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.
SIRIUS 3RW30 / 3RW40
Manual, 10/2018, NEB535199502000/RS-AB/005
9.3 Soft starter with line contactor (type of coordination 1)
Block diagram of a feeder with an optional main / line contactor
Installation / mounting
73