The AC withstand voltage test equipment is a dedicated high-voltage testing device used to detect the insulation strength of electrical equipment. It is widely applied in multiple fields such as power systems, industrial manufacturing, and scientific research and testing. Its core functions and related application scopes are as follows:
I. Core Application Scopes
(1) Verification of Insulation Performance of Electrical Equipment
Testing the insulation strength of electrical equipment under rated AC high voltage to ensure that the equipment can withstand overvoltage during operation; simultaneously verifying the reliability of the insulation design, materials, and processes of the equipment.
(2) Preventive Tests and Handover Tests
Preventive tests: Regularly inspecting the insulation status of operating equipment to prevent insulation breakdown failures.
Handover tests: Verifying the insulation performance of newly installed or overhauled equipment to meet the operational standards.
(3) Fault Diagnosis and Quality Assessment
Accurately identifying insulation defects such as cracks, moisture, and aging through withstand voltage tests; used for quality inspection of products leaving the factory to ensure they meet relevant national standards, such as GB/T 16927 and IEC 60060.
II. Typical Application Scenarios
(1) Power System Field
Transformers: Conducting power frequency withstand voltage tests on windings, bushings, and tap changers.
High-voltage switchgear: Performing insulation tests on circuit breakers, disconnectors, and GIS (Gas Insulated Switchgear).
Power cables: Implementing AC withstand voltage tests on medium and high-voltage cables; for long cables, resonant withstand voltage systems can be used.
Current and voltage transformers: Conducting insulation strength tests on voltage transformers (PT), current transformers (CT), and power capacitors.
Generators and motors: Conducting power frequency withstand voltage tests on stator windings to assess insulation aging.
(2) Industrial Manufacturing Field
Electrical equipment manufacturers: Conducting factory tests on circuit breakers, insulators, surge arresters, and distribution cabinets.
Railway transportation: Conducting high-voltage insulation tests on traction transformers and on-board electrical equipment.
New energy field: Verifying the insulation performance of photovoltaic inverters, wind power converters, and energy storage systems.
(3) Research and Testing Institutions
Insulation material research: Evaluating the withstand voltage performance of new insulation materials such as epoxy resin and silicone rubber.
High-voltage laboratories: Simulating test environments such as lightning impulse and operating overvoltage.
(4) Specific Industry Applications
Petroleum and chemical industry: Conducting insulation safety tests on explosion-proof electrical equipment.
Underground coal mines: Performing moisture-proof insulation tests on mine high-voltage switchgear and transformers.
Aerospace: Verifying the high-voltage withstand capability of on-board electrical equipment.
Post time: Feb-04-2026