Overspeed car rides

• Causes

1. Malfunction of pulley system
2. mechanical breakdown/defects

• Description of defect

Mechanical failures are the prime cause in the case where elevators drop rapidly within the hoistway.

Overspeed car will cause uncomfortable rides to the passengers and worst, sudden acceleration or deceleration can a fall hazard to the passengers due to loss of upright stability.

However, the case of elevators plunge is rarely occurring as the system is equipped with several safety features that prevent a free-fall of elevator cars.