Several common knowledge points about soft starters
1.What to do if the soft starter fails in a low temperature environment (-20℃)?
(1)Hardware protection: Optional heating module (such as Schneider ATS series antifreeze model).
(2)Parameter adjustment: Initial voltage increased by 10%-15% (compensate for low temperature lubrication resistance).
Extend the start and stop time to 1.5 times the normal value.
(3)Regular maintenance: Clean condensed water every quarter and check the circuit board insulation.
2.What are the risks of using soft starters for multiple motors in parallel?
Current superposition: The total current may exceed the grid capacity during parallel starting → Use a "time-sharing start" strategy (interval ≥ 5s).
Harmonic interference: Multiple SCRs generate harmonics → Install input-side reactors (to suppress 5th and 7th harmonics).
Control conflict: Avoid sharing the same signal source → Configure each start-stop logic independently.