Bypass connection [t-head1-pg]
After the run-up (full mains voltage reached) the DM4 soft starter actuates the bypass contactor. Thus, the motor is directly connected with the mains.
Advantage:
The bypass contactor is now switched to a no-load state and can therefore be AC-1 rated.
If an immediate de-energization is required in the event of an Emergency-Stop, then the bypass contactor must also switch the motor load. In this case it must be AC-3 rated.
Control section [t-head3]
Emergency-Stop
S1: Off
S2: On

Enable

Soft start/Soft stop
DM4-340 with bypass [t-head3]

Control voltage through Q1 or F1 or through Q2

See Control section

Motor current indication

