Photovoltaic power plants are exposed to complex outdoor environments for a long time, and components, cables, combiner boxes, and other equipment are easily affected by factors such as humidity, aging, and corrosion, leading to a decrease in insulation performance and causing safety accidents such as leakage, short circuits, and fires, posing a threat to personnel safety and property damage. Insulation resistance testing is the core method for electrical safety inspection of photovoltaic systems. Accurate and efficient insulation testing equipment is the key to ensuring the safe and stable operation of photovoltaic power plants. Jiangsu Jingwei Technology Co., Ltd. focuses on the pain points of photovoltaic electrical safety and has independently developed the JW-J25 insulation resistance tester. With precise high-voltage measurement, multiple safety protection, and intelligent detection functions, it provides comprehensive protection for the electrical safety of photovoltaic systems throughout their entire lifecycle. Leakage current test
The JW-J25 insulation resistance tester is a high-precision diagnostic equipment designed specifically for electrical safety testing of photovoltaic systems. The core adopts DC high voltage testing technology and precision sampling system, which can accurately measure the insulation resistance and grounding continuity of photovoltaic modules, DC cables, combiner boxes, inverters and grounding devices, and comprehensively evaluate the electrical safety status of the system. The equipment provides four testing voltages of 250V, 500V, 1000V, and 1500V, covering the full range of insulation detection requirements from low to medium voltage of photovoltaic systems. The insulation resistance measurement range is 0-2000M Ω, with a measurement accuracy of ± 5%. It can accurately identify hidden dangers such as insulation degradation, moisture, damage, and virtual connection, and avoid safety accidents caused by insulation faults.
Safety design is the core advantage of JW-J25. In response to the detection risks of photovoltaic high-voltage systems, the equipment is equipped with multiple protection mechanisms: the high-voltage output terminal has short-circuit protection, overcurrent protection, and reverse connection protection functions, which can withstand residual voltage surges of the tested equipment and prevent equipment damage and personnel contact with electricity; The body adopts an insulated shell design, equipped with insulated test lines and safety crocodile clips. The operation interface has a high-voltage warning function, ensuring the safety of testing from hardware to operation throughout the entire process. At the same time, it is equipped with an intelligent self checking function, which automatically detects the device status, battery level, and line connection when turned on. Any abnormal situations are promptly alerted to avoid misoperation and ineffective detection, thereby improving the safety and reliability of operations.
Portability and ease of use are designed to adapt to the complex working conditions of photovoltaic sites. The JW-J25 adopts a lightweight body design, with a small size and light weight. It is equipped with a portable protective case and a built-in rechargeable lithium battery. It can be used continuously for 6-12 hours when fully charged. It supports AC and DC dual power supply and is suitable for outdoor scenarios without mains power. It can be easily carried by a single person to any location in the power station for quick detection. The device is equipped with a large Chinese LCD screen, which provides clear and easy to read data. It supports real-time display of insulation resistance, automatic calculation of absorption ratio and polarization index, without the need for manual conversion. With one click operation, it simplifies the testing process and allows beginners to quickly complete the test. Simultaneously equipped with data storage and export functions, it can automatically record test time, voltage, resistance values and other data, support data export and printing, generate standardized testing reports, facilitate safety file management and hidden danger tracing.
In practical applications, the JW-J25 insulation resistance tester covers the full cycle safety testing scenarios of photovoltaic systems: during the construction and installation phase of power plants, insulation tests are conducted on components, cables, and combiner boxes to identify insulation damage, wiring errors, and other issues during installation, ensuring the safe grid connection of the system; During the regular maintenance and testing phase, conduct insulation inspections of the entire system on a periodic basis to promptly identify insulation degradation hazards caused by equipment aging, moisture, and corrosion, and eliminate safety risks in advance; In the troubleshooting stage, for problems such as leakage alarm, tripping, and abnormal power generation, quickly locate the location of insulation faults, narrow the scope of investigation, and shorten downtime; Evaluation of the renovation of old power stations, comprehensive testing of the insulation performance of old equipment, assessment of safety risks, and providing a basis for the design of renovation plans; Daily safety inspections, quick spot checks on the insulation status of key equipment, building a strong safety defense line for the power station, and ensuring long-term stable operation.
Jiangsu Jingwei Technology Co., Ltd., as a professional enterprise in the field of photovoltaic electrical safety testing, deeply cultivates high-voltage testing and safety protection technology. Its products have passed multiple authoritative safety certifications and meet the electrical testing standards of the photovoltaic industry. They have been widely used in various scenarios such as large-scale ground power stations, distributed photovoltaics, and household photovoltaics in China. The launch of JW-J25 insulation resistance tester fills the market gap of portable high-voltage insulation testing equipment for photovoltaic applications. With high safety, precision, and portability, it has become a standard equipment for electrical safety testing in photovoltaic power plants.
In the future, Jiangsu Jingwei will continue to focus on innovation in photovoltaic electrical safety technology, continuously optimize the performance of JW-J25 products, improve the level of intelligent detection, and provide professional technical training and after-sales service to customers, helping photovoltaic enterprises build a solid safety defense line, achieve safe, stable, and efficient operation, and promote the safe and healthy development of the photovoltaic industry.
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