Siemens SIRIUS 3RW55 - Page 308

DANGER
Loss of the certi󹪝ed motor overload protection according to ATEX/IECEx.
Will cause death or serious injury.
Note that operation of a 3RW55 or 3RW55 Failsafe soft starter with motor connection type
"Inside-delta" without implementing one of the two following remedial measures results in loss
of certi󹪝ed motor overload protection according to ATEX/IECEx:
Depending on the structure of the circuit, choose one of the following possibilities for ensuring
certi󹪝ed motor overload protection according to ATEX / IECEx:
• Use an additional line contactor in the main circuit (in the supply cable or in the delta
connection).
Connect the line contactor at outputs 95, 96 and 98 (output 3).
• For a motor feeder con󹪝guration with a circuit breaker, use an additional undervoltage trip
unit.
Connect the undervoltage trip unit at outputs 95, 96 and 98 (output 3).
You will 󹪝nd more information in chapter Connecting (Page 71).
Example circuits
A.3 Special applications
SIRIUS 3RW55 and 3RW55 Failsafe Soft Starters
308 Equipment Manual, 02/2022, A5E35630887002A/RS-AF/006