String efficiency provides information about potential distribution across the string of insulators. Today you'll learn the basic formula to calculate string efficiency of insulators.

Let's get started:

Let's solve a few examples for better understanding.

Example 1: Find the string efficiency of a 37 kV string containing 20 insulators. The potential across lowest disc is 2 kV.

Solution: String efficiency = [37] / [2 * 20] = 92.5

Example 2: Calculate the string efficiency of 50 kV string containing 13 insulators. The potential across the nearest disc to the conductor is 5 kV.

Solution: String efficiency = [50] / [5 * 13] = 76.9%

Learn Top 100 Basic Electrical Engineering formulas.

Let's get started:

Let's solve a few examples for better understanding.

Example 1: Find the string efficiency of a 37 kV string containing 20 insulators. The potential across lowest disc is 2 kV.

Solution: String efficiency = [37] / [2 * 20] = 92.5

Example 2: Calculate the string efficiency of 50 kV string containing 13 insulators. The potential across the nearest disc to the conductor is 5 kV.

Solution: String efficiency = [50] / [5 * 13] = 76.9%

Learn Top 100 Basic Electrical Engineering formulas.

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