No need connect bypass contactor 3 phase 380V motor online running soft starter  

Reliable quality
The computer simulation design.
SMT production process.
Good EMC performance.
The machine before delivery on the high temperature aging, vibration test.
Perfect and reliable system protection function
Protection of no voltage, less voltage and over voltage.
Protection of overheating and starting time too long.
Protection of Input phase lost, output phase lost and 3phase unbalance.
Protection of starting over current, running overload, and load short circuit protection.
Maintenance function
Fault self-diagnosis(short circuit, over voltage, less voltage, one phase grounded, motor overload, one phase lost,
motor blocked, and intelligent software can inspect drag system working state).
Combination of modular design, according to the fault display content, quick troubleshooting.
Independent intellectual property products
Independently software copyright.
Motor starting and protection proprietary technology.
Unique way to detect debug equipment and process.