Question
What is the purpose of a single point ground panel?
Answer Options
- A) Remove AC power in case of a short-circuit
- B) Prevent common-mode transients in multi-wire systems
- C) Eliminate air gaps between protected and non-protected circuits
- D) Ensure all lightning protectors activate at the same time
Correct Answer: D
Explanation
The single point ground panel is the physical backbone of an effective station grounding and lightning protection system. Its purpose is not merely to provide a path to earth, but to ensure that all protective devices reference the same point, minimizing potential differences during a high-energy transient event like a lightning strike.
The fundamental purpose of a single point ground panel is to ensure all lightning protectors activate at the same time. By connecting all suppressors (AC power, antenna feed lines, control lines) to a single, common point, the panel eliminates any voltage difference between the lines. This prevents a lightning strike from one path from creating a voltage difference that could arc across equipment and cause widespread damage.
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