Which device is an example of a warning device that can tell the operator to stop movement of the boom/load line when near energized powerlines?

Which device is an example of a warning device that can tell the operator to stop movement of the boom/load line when near energized powerlines?

• A. An insulating link
• B. A high-voltage proximity warning device
• C. A weather radar
• D. A signal flag

Answer: (B)

In crane safety near energized power lines, a warning system that actively detects how close you are to live conductors and prompts you to stop is essential. A high-voltage proximity warning device does just that: it uses sensors to monitor the distance to energized lines and provides an alert to the operator, and in many designs can automatically limit or stop boom/load movement to maintain a safe clearance. This directly addresses the hazard of electrocution from nearby lines by giving a timely warning and, if needed, an automatic protection action.

An insulating link, on the other hand, is about preventing current from traveling if contact occurs, reducing the severity of an electrical fault but not serving as a warning or automatic stop system. A weather radar tracks weather conditions and wind, not electrical hazards. A signal flag is a ground-based signaling method for communication, not an automatic warning that halts crane movement.