Question

The most important test to assert the proper functions of a surge diverter is:

• A. 100% impulse withstand test
• B. Front of wave spark over and residual voltage tests
• C. Impulse current test
• D. Pollution tests

Hint:

The impulse current test is the most important test for a surge diverter, ensuring it can handle lightning and switching surges effectively.

Answer 1

The Correct Option is C

Step 1: Surge Diverter (Lightning Arrester) Testing A surge diverter (lightning arrester) protects electrical equipment from high transient voltages due to lightning or switching surges. 
Step 2: Impulse Current Test The most critical test for verifying a surge diverter's functionality is the impulse current test, which ensures:
- The diverter can withstand high impulse currents from lightning strikes.
- It operates correctly to safely divert excess voltage. 
Step 3: Evaluating options: 
- (A) Incorrect: Impulse withstand tests evaluate insulation strength but are not the primary test for surge diverters.
- (B) Incorrect: Spark over and residual voltage tests measure breakdown voltage but do not fully validate operational performance.
- (C) Correct: The impulse current test is the primary test ensuring proper function.
- (D) Incorrect: Pollution tests check environmental resistance but are not the most crucial test.