Product Details

Heavy-Duty Cam Switches for Elevator Under-Car Electrical Circuit Switching

Cam Switches are robust, multi-position rotary electrical switching devices installed in elevator under-car applications to control and route electrical circuits associated with under-car equipment, lighting systems, and safety functions. The cam switch mechanism provides positive, multi-position switching with reliable contact actuation at each selected position, making it the preferred switching solution for applications where multiple circuit states must be selected reliably in the demanding environmental conditions beneath the elevator car.

The rotary cam switch mechanism operates on the principle of cam-actuated contact blocks, where a rotating cam element physically opens and closes contact blocks in a defined sequence as the switch is rotated between positions. This positive mechanical actuation delivers switching reliability that is inherently superior to other switching methods in high-vibration environments — because the cam holds the contacts positively open or closed in each detented position, vibration cannot cause contact bounce or intermediate states that could create circuit faults or false switching signals.

In under-car elevator applications, cam switches are typically used for functions such as lighting circuit mode selection, safety interlock isolation during maintenance operations, circuit routing for diagnostic purposes, and multi-function equipment control from a single switching point. The multi-position capability of the cam switch enables several distinct circuit configurations to be selected from one compact device, reducing the number of individual switches required in the under-car control assembly.

Cam switches for elevator under-car installation are engineered to withstand the vibration generated by elevator travel, the dust and moisture present in shaft environments, and the temperature range experienced across the full operational envelope of the elevator installation. Contact blocks are rated for reliable performance across the switching cycles accumulated over the elevator's service life, maintaining consistent circuit switching without contact degradation or mechanism wear that could compromise elevator system reliability.

For elevator OEMs and installation contractors specifying under-car electrical switching solutions that combine multi-position functionality with robust mechanical reliability in demanding elevator shaft conditions, Cam Switches deliver the switching performance and environmental durability that under-car elevator applications require.

Key Features

• Positive cam-actuated multi-position switching for reliable circuit control
• Vibration-immune contact retention — no contact bounce between positions
• Multi-position capability reduces switch count in under-car assemblies
• Rated contact blocks for long-term switching reliability in shaft environments
• Dust, moisture, and temperature resistant for under-car installation