What device is responsible for cutting power to elevator motors when activated?

The device responsible for cutting power to elevator motors when activated is the shunt-trip. This mechanism is designed to disconnect power to electrical equipment, such as elevator motors, in emergency situations. When a specific condition is met, such as a fire or fault detection, the shunt-trip triggers and opens the circuit, preventing the elevator from operating and ensuring safety.

Using this device is crucial in preventing potential hazards associated with elevator operation during emergencies, as it effectively stops any ongoing movements, reducing the risk of accidents or further complications. The incorporation of shunt-trips in elevator systems is a standard safety feature, ensuring that the power can be cut off quickly and efficiently when needed.