What is the proper order of activation for the governor overspeed switch and safety jaw switch?

The correct order of activation is for the overspeed switch to act before the safety jaw switch. The governor overspeed switch is designed to detect when the elevator is moving faster than its designated speed. When this overspeed condition is detected, the overspeed switch activates first, taking immediate action to halt the elevator's movement and prevent potential accidents or hazards related to excessive speed.

Following the activation of the overspeed switch, the safety jaw switch acts as an additional safety mechanism. It engages to secure the elevator in place, ensuring that no unintended movement occurs while the elevator is in a potentially unsafe condition. This sequence is critical because it ensures that the faster responding mechanism (the overspeed switch) is activated first to manage the immediate risk.

Understanding this sequence emphasizes the importance of safety protocols in elevating devices, where swift action can make the difference between risk and safety. Each component plays a significant role in ensuring the elevator operates within its safe parameters, highlighting the importance of their correct order of activation.