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DANGER
Loss of the certified 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 certified motor overload protection according to ATEX/IECEx:
Depending on the structure of the circuit, choose one of the following possibilities for ensuring
certified 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 configuration 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 find 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