Feeder Assembly, Type Of Coordination 1 With Fuses - Siemens SIRIUS 3RW55 Equipment Manual

A.1.2

Feeder assembly, type of coordination 1 with fuses

Requirements
• 3RW55 or 3RW55 Failsafe soft starter
For the 3RW55 Failsafe soft starter, note that a Q21 line contactor must be switched on
before the start command so that the 3RW55 Failsafe soft starter can run the device test
before switch-on.
• The motor connection type (Page 95) is parameterized as "Automatic detection" or
"Standard".
Feeder assembly
If galvanic isolation is required, install a main or line contactor between the 3RW55 or 3RW55
Failsafe soft starter and the fuses.
Do not connect the main or line contactor between the 3RW55 or 3RW55 Failsafe soft starter and
the motor. The 3RW55 or 3RW55 Failsafe soft starter could otherwise display a "Missing load"
error message in the event of a start command and delayed connection of the contactor.
SIRIUS 3RW55 and 3RW55 Failsafe Soft Starters
Equipment Manual, 02/2022, A5E35630887002A/RS-AF/006
Example circuits
A.1 Main circuit connection
293