Which device prevents overspeeding of the stairlift?

• A. Call/Send Controls
• B. Tripping Point
• C. Overspeed Governor
• D. Vertical Speed

Answer: (C)

The device that prevents overspeeding of the stairlift is the overspeed governor. It monitors the drive speed and automatically acts to keep it within a safe limit, reducing drive torque or applying braking if the speed tries to exceed that preset point. This safety feature directly controls how fast the chair can move, protecting riders from acceleration that could cause loss of control or injury.

Call/send controls are for summoning or directing the chair to a floor and don’t regulate speed. A tripping point is a safety interlock that stops the system under abnormal conditions, but it isn’t the device that continuously limits speed. Vertical speed is just the rate of travel, not a component that prevents overspeed.