Restaurant elevator control circuit

This product can be used to deliver meals in restaurants with kitchens on the ground floor and restaurants on the second and third floors.
It can also be used to transport goods in stores, warehouses, etc. on three floors. The circuit has simple structure and high safety.
    The lifting motor is a 3kW cage asynchronous motor. The operating system is located in the kitchen on the ground floor. There are only signal displays on the second and third
floors to prevent unauthorized operation by outsiders and cause accidents. The access openings on the second and third floors are closed 1.3m from the ground to prevent children from accidentally entering.
    In the picture, SQ3 is the lifting bucket and ultra-high limit protection switch , and SB7 is the emergency stop button.