During long-term operation, the main motor overheats seriously, trips frequently and triggers overload protection shutdown, directly interrupting production.
Main causes: forced overloaded production beyond standard sheet thickness and speed; stuck bearings increasing motor load; three-phase power phase loss causing abnormal heating; aging wires with damaged insulation leading to electric leakage.
Solutions: Operate strictly according to standard parameters and avoid overload production; lubricate bearings regularly to reduce running resistance; check three-phase power supply periodically; replace aging and damaged wires to ensure stable and safe motor operation.
