Is there a danger of sudden power failure during elevator operation?

If the elevator encounters a sudden power failure or the power supply line fails, the elevator will automatically stop running without any danger. Because the elevator itself is equipped with electrical and mechanical safety devices, once the power is cut off, the brakes of the elevator will automatically brake, making the elevator unable to operate. In addition, if the power supply department has a planned power outage, the elevator will be notified in advance, or the elevator will stop running in advance. When the elevator is powered off, there is a safety gear on the lower part of the car, which will catch the rails. The car is fixed on the rails and will not slip. Some elevator control cabinets have emergency power supply. When a sudden power failure occurs, the power inside the emergency power supply is enough to send the car to the floor, and open the door to make the passengers safe.