Insulation resistance tester SR-DZ-21CBy applying DC high voltage to test the insulation resistance value of electrical equipment, it is a core testing tool for ensuring electrical safety in fields such as power systems, electrical equipment manufacturing, and building electrical. It can detect hidden dangers such as insulation aging, moisture, and damage in advance, and avoid safety accidents such as leakage, short circuits, and fires. ​

High voltage testing and precise reading are its core functions. The device can output different levels of DC high voltage, such as 500V, 1000V, 2500V, 5000V, etc., to meet the testing needs of electrical equipment at different voltage levels. The insulation resistance value is measured by a high-precision ohmmeter, with a range of 0-10000M Ω and an error control within ± 5%. In the power system, maintenance personnel regularly use insulation resistance testers to test the insulation resistance of transformers, cables, and motors. If the value is lower than the standard value, it indicates that there is a defect in the equipment insulation and timely maintenance is required; In the electrical acceptance of buildings, the insulation resistance of wall wiring and socket circuits is tested to ensure that the insulation of the lines meets safety standards and prevent electric shock accidents caused by insulation failure. ​

Various testing modes are adapted to meet different scenario requirements. The equipment has the functions of "absorption ratio test" and "polarization index test". By measuring the insulation resistance ratio at different time points, the degree of insulation moisture or aging of the equipment can be determined - for example, when the insulation of a motor is damp, the absorption ratio will significantly decrease; The "continuous testing" mode can monitor insulation resistance changes in real time and track the dynamic degradation process of equipment insulation performance. In the manufacturing of electrical equipment, the production line conducts factory inspections on products such as circuit breakers and switchgear through insulation resistance testers to ensure that the insulation performance of each device meets the standards. ​

Safe and portable design enhances usability. The SR-DZ-21C insulation resistance tester is made of flame-retardant insulation material and equipped with dual protection grounding and leakage protection circuits to avoid the risk of high voltage electric shock during testing; The portable model weighs only 1-3kg and is equipped with a handheld handle and digital display screen, making it easy to move and test on site. Some intelligent testers support data storage and USB export, which can generate test reports and facilitate archive management for security testing. With the development of electrical equipment towards high voltage and large capacity, insulation resistance testers are upgrading towards intelligence and digitization. By connecting to mobile apps via Bluetooth, remote control and data sharing can be achieved, further improving the efficiency and convenience of electrical safety testing. ​