Specialized test equipment for verifying insulation performance and safety of electrical equipment and electronic components. Essential measuring instruments for quality control and safety standard compliance verification of electrical products in manufacturing. Includes AC/DC withstand voltage testers, insulation breakdown testers, and high voltage test equipment that test insulation strength of electronic components, control panels, motors, transformers, cables at specified voltages. Capable of testing in compliance with JIS and IEC standards, supporting wide range from production line integrated types to high-precision types for research and development. Unlike insulation resistance meters, these specialized devices perform breakdown testing by applying high voltage and are used for final verification of electrical safety.