The string efficiency of dc power systems is:
- 25%
- 50%
- 75%
- 100%
Correct answer: 4. 100%
Why String Efficiency of DC Systems is 100% – MCQ Explanation
String efficiency is defined as the ratio of voltage across the whole insulators string to the product of the total number of discs and the voltage across the disc that is located in closest proximity to the conductor is known as string efficiency.
In the case of Alternating current, the voltage applied across the string insulators is not uniformly distributed.
In the case of direct current (DC), the insulator’s capacitances are ineffective and the voltage across each unit of insulators is the same. Due to which the string efficiency of DC systems in 100%
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