High-voltage electrical power transmission lines typically make use of__________________?
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Answer: A. suspension insulators
Explanation
High-voltage electrical power transmission lines require robust insulation systems to prevent dangerous flashover faults. Suspension insulators consist of multiple porcelain or glass discs linked together in flexible vertical strings. This modular design allows utilities to easily adjust the insulation level by adding discs for higher voltages. Overhead power lines are exposed to harsh weather, lightning strikes, and extreme mechanical tension loads. Suspension insulators let heavy conductor strings swing freely during high winds, reducing mechanical stress on towers. Pin insulators are limited to lower distribution voltages because larger sizes become too heavy and mechanically weak.
Electrical utility companies use suspension insulators on all major high-voltage grid transmission towers worldwide. Insulator strings are routinely cleaned and tested to prevent power outages caused by pollution buildup. Power transmission reliability depends heavily on the structural integrity of suspension insulator hardware. Pin insulators are restricted to lower-voltage distribution lines because they cannot handle extreme transmission voltages. Stating both A and B is incorrect because pin insulators are completely unsuitable for high-voltage transmission. Selecting none of the above is wrong because suspension insulators are the industry standard for high voltages.
- Subject
- Engineering
- Category
- Electrical Engineering
- Topic
- —
- Difficulty
- medium
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