High Voltage Testing
Scopes & Testing
High Voltage Testing
High Voltage Testing
High voltage testing is a critical procedure used to evaluate the electrical integrity and insulation capabilities of various electrical and electronic equipment, components, and systems operating at higher voltage levels. It is performed to ensure the safety, reliability, and compliance with industry standards and regulations. High voltage testing is commonly used for power distribution equipment, transformers, cables, motors, capacitors, circuit breakers, and other high voltage apparatus.
There are several types of high voltage tests, each serving specific purposes:
- 1) Di-electric Withstand Test (Hipot Test): The dielectric withstand test, commonly known as the Hipot test, is designed to verify the insulation integrity of electrical equipment. During this test, a high voltage (typically above the normal operating voltage) is applied between the conductive parts of the equipment and its insulation. The goal is to check if the insulation can withstand the applied voltage without breaking down or allowing excessive current flow.
- 2) Partial Discharge (PD) Test: Partial discharge testing is conducted to detect and measure partial discharges within the insulation system of high voltage equipment. Partial discharges can indicate weak points in the insulation and may lead to insulation breakdown if not addressed. The PD test helps identify potential issues early on to prevent catastrophic failures.
- 3) Impulse Test (Lightning/Switching Surge Test): The impulse test simulates the effects of lightning strikes or switching surges on the equipment. Short-duration high voltage impulses are applied to evaluate the equipment's ability to withstand transient over voltages.
- 4) Repetitive/Pulsed Voltage Test: This test subjects the equipment to repetitive or pulsed high voltage to assess its performance under repeated voltage stresses.
- 5) Step Voltage Test: Step voltage testing is performed to evaluate the dielectric strength of soil or ground beneath a high voltage tower or substation. It helps ensure the integrity of the grounding system and safety for personnel.
- 6) Voltage Endurance Test: This test involves applying a high voltage for an extended period to assess the equipment's capability to operate continuously under such conditions.
- 7) Capacitance and Tan Delta Test: The capacitance and tan delta test measures the dielectric losses and capacitance of high voltage equipment. It helps identify issues with the insulation material and aging effects.
It's important to note that high voltage testing should be conducted by trained personnel in controlled laboratory or testing environments, adhering to safety protocols and guidelines to prevent accidents and injuries. At House of Testing, we offer tailored testing solutions to meet your specific needs, providing detailed reports that highlight the performance of your product under High Voltage Test. We have the equipment which are appropriately rated and maintained to ensure accurate and reliable results. Additionally, we perform the testing in accordance with relevant international standards, such as IEC, IEEE, or other applicable regulations.
