Special Applications; Wiring For Atex / Iecex Applications With Additional Line Contactor - Siemens SIRIUS 3RW50 Manual

Example circuits
A.3 Special applications
A.3

Special applications

A.3.1

Wiring for ATEX / IECEx applications with additional line contactor

Requirements
Loss of the certified motor overload protection according to ATEX / IECEx.
Risk of death or serious injury.
Note that operation in the standard type of motor connection 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.
• For a motor feeder configuration with a circuit breaker, use an additional undervoltage
Automatic restart.
Can cause death or serious injury.
If a starting command is pending, a restart will be triggered automatically after the reset.
This particularly applies if the motor protection has tripped. Dangerous states of the system
can result.
Reset the start command (e.g. via the PLC or switch) before performing a reset.
To do this, for example, link the group error output (terminals 95 and 96) into the control.
216
DANGER
Connect the line contactor at outputs 95, 96 and 98 (output 3).
trip unit.
Connect the undervoltage trip unit at outputs 95, 96 and 98 (output 3).
For more information, see Chapter Connections (Page 69).
WARNING
SIRIUS 3RW50 soft starter
Manual, 09/2019, A5E35628455002A/RS-AA/001