What is the maximum car speed for instantaneous safeties?

The maximum car speed for instantaneous safeties is established to ensure the safe operation of elevators during unexpected situations. Instantaneous safeties are designed to activate rapidly in response to an emergency, such as cable failure or a system malfunction. For effective and reliable operation, the speed limit is set to 150 feet per minute (fpm), as this speed allows sufficient time for the safety mechanisms to engage without compromising the safety of passengers or the integrity of the elevator system.

Setting the maximum speed at 150 fpm aligns with the engineering requirements and safety standards established by regulatory bodies, ensuring that elevators equipped with instantaneous safeties can respond adequately to any fall or acceleration beyond safe thresholds. Speeds exceeding this limit could introduce risks that instantaneous safeties are not designed to mitigate, therefore reinforcing the importance of adhering to this specification.