Which test is mandatory for a 15kV switch?

The mandatory test for a 15kV switch is the Hipot Test, also known as a high potential test. This test is designed to evaluate the insulation integrity of electrical equipment by applying a high voltage that is significantly above the normal operating voltage. Specifically, for a 15kV switch, the Hipot Test ensures that the insulation can withstand operational stresses, preventing potential breakdowns that could lead to equipment failure or safety hazards.

Conducting a Hipot Test helps in identifying weaknesses in the insulation that may not be visible through visual inspection alone. It is essential for ensuring that the equipment will perform safely under the expected electrical conditions, thereby preventing electrical faults that could result in equipment damage or safety risks. Properly executed, the Hipot Test confirms that the switch can handle its rated voltage with a safety margin, which is crucial in maintaining reliability within electrical systems.

Other tests, such as the continuity test and insulation resistance test, while important for different aspects of electrical maintenance and operation, do not specifically verify the ability of the switch insulation to handle high voltages like the Hipot Test does. The load test is typically conducted to evaluate the performance of the switch under normal operating conditions rather than its insulation characteristics, making it less relevant in this context.