Example circuits
A.3 Special applications
SIRIUS 3RW50 soft starter
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Manual, 09/2019, A5E35628455002A/RS-AA/001
Requirements
WARNING
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.
Tripping of the EMERGENCY STOP circuit
If the soft stop function is set (stopping time setting element set to > 0 s) and the emergency
stop circuit is tripped, a "Missing load voltage, phase failure / missing load" fault may be
indicated on the 3RW50 soft starter. In this case, the 3RW50 soft starter must be reset
according to the selected RESET MODE.