Photovoltaic power plants are exposed to complex outdoor environments for a long time, and the insulation performance of photovoltaic modules, cables, combiner boxes, inverters, and other equipment is easily affected by factors such as humidity, aging, corrosion, and mechanical damage, resulting in a decrease in insulation resistance and causing safety accidents such as leakage, short circuits, and fires, seriously threatening the safety of photovoltaic power plant equipment and personnel. Insulation resistance testing is the core project of electrical safety inspection in photovoltaic power plants. Accurately detecting insulation resistance values and promptly identifying insulation hazards are key to ensuring the safe and stable operation of photovoltaic power plants. Jiangsu Jingwei Technology Co., Ltd. is deeply engaged in the field of photovoltaic electrical safety testing, and has innovatively developed the JW-J25 insulation resistance tester. With precise high-voltage measurement, multiple safety protections, and portable intelligent design, it provides reliable solutions for electrical safety testing of photovoltaic power plants. Leakage current test
The DC side voltage of photovoltaic systems can reach 1000V-1500V, and the insulation performance of equipment is extremely high in high-voltage environments. The insulation resistance value is the core indicator for evaluating electrical isolation performance and identifying insulation hazards. Traditional insulation resistance testers often suffer from problems such as single voltage range, low measurement accuracy, insufficient safety protection, complex operation, and poor portability, making it difficult to adapt to the high voltage, high precision, and high safety detection needs of photovoltaic systems; Some devices lack intelligent self checking and data recording functions, which cannot meet the long-term operation and archive retention needs of photovoltaic power plants. The R&D team of Jingwei Technology has developed the JW-J25 insulation resistance tester, which combines high-voltage testing technology, precision sampling technology, and intelligent protection technology to address the pain points of electrical safety testing in photovoltaic systems. The tester combines safety, accuracy, and convenience, becoming a core tool for photovoltaic electrical safety operation and maintenance.
High voltage multi gear measurement, accurately adapted to photovoltaic scenarios. The JW-J25 insulation resistance tester is equipped with a DC high voltage generation module, providing four levels of testing voltage: 500V, 1000V, 2500V, and 5000V. It can accurately match the insulation testing needs of different equipment such as photovoltaic modules, DC cables, combiner boxes, and inverters on the DC side. The measurement range is 0-10000M Ω, with a resolution of up to 0.1M Ω and a measurement accuracy of ≤± 1%. It accurately captures small changes in insulation resistance and promptly detects hidden dangers such as insulation aging, moisture, and damage. The device supports polarization index (PI) and absorption ratio (DAR) testing, which can deeply evaluate the degree of insulation medium moisture, dirt, and aging through the change of insulation resistance over time, providing scientific basis for the classification and treatment of insulation hazards, far exceeding the detection capability of ordinary insulation testers.
Multiple security measures ensure the safety and reliability of the testing process. During the high-voltage detection process of photovoltaic systems, there are high risks such as residual voltage, leakage, and short circuit, and safety protection is the core key. The JW-J25 insulation resistance tester is equipped with six safety protection mechanisms: high-voltage output anti misoperation design, residual voltage automatic discharge function, overvoltage/overcurrent/short circuit protection, leakage protection, reverse polarity protection, and insulation level protection, which can effectively avoid safety risks during the detection process and protect the personal safety of operators and equipment safety. The instrument is equipped with an intelligent self checking function, which automatically detects equipment faults, battery level, and line connection status when turned on. Abnormal situations will automatically alarm and prompt the cause of the fault, avoiding safety accidents caused by faulty operation; Adopting high-strength insulation shell, with a waterproof and dustproof rating of IP65, it can adapt to harsh outdoor environments such as humidity and dust, ensuring safe and stable operation under complex working conditions.
Portable intelligent design, suitable for efficient detection in multiple scenarios. The JW-J25 insulation resistance tester adopts a lightweight body design, with a total weight of only about 4.2kg, and is equipped with a high-strength portable case, making it easy to carry to various photovoltaic power plant sites; The body adopts ergonomic design, which is comfortable to hold and easy to operate. It can be completed by one person for testing tasks. Equipped with high-definition LCD display screen, real-time display of test voltage, insulation resistance value, polarization index, absorption ratio and other data, backlight design suitable for night and low light environment operation; Support data locking, peak retention, and historical data storage, capable of storing over 5000 sets of detection data for easy traceability and analysis in the future. Built in long-lasting lithium battery, capable of continuous testing for over 500 times on a single charge, meeting the needs of a whole day of field work; Equipped with a dedicated testing line, the length can reach up to 10 meters, suitable for long-distance detection needs of large photovoltaic power plants.
Intelligent data management helps standardize security operations and maintenance. The JW-J25 insulation resistance tester supports data export and software linkage, and can export detection data to a computer through a USB interface. It is equipped with professional analysis software to generate insulation detection reports and supports custom report templates, including testing time, location, equipment model, testing voltage, insulation resistance value, hazard analysis, and other information. It meets the needs of power station operation and maintenance file retention, acceptance delivery, third-party testing, etc. The instrument has intelligent warning function, which can set insulation resistance threshold. When the detection value is lower than the threshold, it will automatically alarm and remind the operation and maintenance personnel to deal with hidden dangers in a timely manner, realizing early detection and treatment of insulation hidden dangers, avoiding safety accidents, and promoting the standardization and normalization of electrical safety operation and maintenance of photovoltaic power plants.
With excellent safety performance, precise measurement capability, and convenient operating experience, the JW-J25 insulation resistance tester has been widely used in photovoltaic power plant construction acceptance, regular safety inspections, fault diagnosis, equipment maintenance, and renovation of old power plants. It has become an essential safety testing equipment for photovoltaic power plant operators, EPC enterprises, operation and maintenance companies, and testing institutions. From distributed rooftop power stations to large-scale ground power stations, this equipment provides reliable quality to safeguard the electrical safety of photovoltaic power stations, effectively reducing the incidence of safety accidents such as leakage, short circuits, and fires, and ensuring the long-term safe and stable operation of photovoltaic power stations.
Jiangsu Jingwei Technology always adheres to the concept of "safety first, quality first, and technology as the soul", focusing on the research and innovation of photovoltaic electrical safety testing equipment. The launch of JW-J25 insulation resistance tester fills the market gap of photovoltaic high-voltage insulation detection equipment and provides core support for electrical safety control in the photovoltaic industry. In the future, Jingwei Technology will continue to deeply cultivate the field of photovoltaic safety testing, continuously optimize product performance, enhance product intelligence and safety, and support the safe, healthy, and sustainable development of the photovoltaic industry with higher quality products and services.
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