What is the governor tripping speed for a 100 fpm car?

• A. 100 fpm
• B. 150 fpm
• C. 175 fpm
• D. 200 fpm

Answer: (B)

The governor tripping speed for an elevator is a critical safety parameter that helps ensure the elevator operates within safe limits. For a car with a rated speed of 100 feet per minute (fpm), the typical tripping speed is set at 150 fpm. This means that if the car exceeds this speed due to some malfunction or irregularity in operation, the governor will activate and stop the car to prevent accidents.

The selection of 150 fpm as the tripping speed provides an adequate safety margin. It allows for a brief acceleration beyond the rated speed without compromising safety while ensuring that the governor can effectively respond to situations where the elevator exceeds its normal operating conditions.

Understanding governor tripping speeds is essential for elevator safety and compliance with regulations, making it an important concept for those involved in elevator operation and maintenance.