Photovoltaic power plants are exposed to complex outdoor environments for a long time, and components, cables, combiner boxes, inverters, and other equipment are susceptible to moisture, aging, corrosion, external damage, and other factors, leading to insulation performance degradation, grounding faults, electrical leakage, and other electrical safety hazards. This not only affects the normal operation of the power plant, but can also cause safety accidents such as fires and electric shocks, posing a threat to personnel and property safety in severe cases. Jiangsu Jingwei Technology Co., Ltd. is deeply engaged in the field of photovoltaic electrical safety testing. With professional technical accumulation and rich industry experience, we have carefully developed the JW-J25 insulation resistance tester, which provides comprehensive, accurate, and safe testing capabilities to safeguard the electrical safety of photovoltaic power plants. DC withstand voltage, insulation impedance, grounding resistance, leakage current
The electrical safety testing of photovoltaic systems is a key link in the construction acceptance, daily operation and maintenance, and safety audit of power plants. Insulation resistance testing, withstand voltage testing, and grounding continuity testing are the core means of identifying electrical hazards. Traditional insulation testing equipment often has problems such as single function, insufficient accuracy, weak safety protection, and complex operation, which make it difficult to meet the safety testing needs of photovoltaic systems in high voltage and complex electrical environments. Jiangsu Jingwei R&D team focuses on industry pain points and innovatively adopts AC/DC composite testing technology and precision sampling system to create this multi-functional, high-precision, and high safety JW-J25 insulation resistance tester, which provides one-stop solutions to electrical safety testing problems such as insulation, withstand voltage, and grounding in photovoltaic systems.
The JW-J25 insulation resistance tester has comprehensive detection functions and ultra-high measurement accuracy. It can perform multiple tests such as DC withstand voltage, insulation resistance, grounding continuity, AC withstand voltage, polarization index, etc., fully covering the electrical safety testing needs of photovoltaic modules, cables, combiner boxes, inverters, brackets and other equipment. The measurement range of equipment insulation resistance is 0-1000M Ω, with a measurement accuracy of ± 1%; The AC/DC withstand voltage test voltage can be adjusted from 0-5000V with an accuracy of ± 2%. It can accurately evaluate potential risks such as insulation material aging, moisture infiltration, interface oxidation, installation process defects, etc., and provide early warning of safety hazards such as leakage, short circuit, and fire. At the same time, the equipment has polarization index analysis function, which can deeply evaluate the degree of moisture and aging of insulation materials through the trend of insulation resistance changes over time, providing scientific basis for predicting insulation performance life.
Safety protection design is the core highlight of JW-J25, tailored specifically for photovoltaic high-voltage electrical environments. The equipment is equipped with multiple safety protection mechanisms, including high-voltage isolation, overvoltage protection, overcurrent protection, leakage protection, and automatic discharge function. After the test is completed, it can automatically release high-voltage residual charges to avoid the risk of electric shock. Adopting anti-interference reinforced shell, dustproof, waterproof, and impact resistant, suitable for harsh outdoor conditions such as humidity, sandstorms, high temperature, and low temperature; Equipped with a high brightness outdoor visual screen, data is clearly visible under strong light, making it convenient for outdoor on-site operations. At the same time, the device has an intelligent self checking function, which automatically detects the device status, battery level, and whether the wiring is normal when turned on. In case of abnormalities, it will automatically alarm and prompt the cause of the fault, avoiding safety accidents caused by misoperation and ensuring the safety and reliability of the detection process.
Portability and intelligent design enhance outdoor work efficiency and convenience. JW-J25 adopts a compact and lightweight design, with a small size and light weight, and is equipped with a high-strength protective box, making it easy to carry to various photovoltaic power plant scenarios. Equipped with high-definition touch screen display, bilingual operation interface in Chinese and English, simple and intuitive functional layout, one click selection of testing mode, starting testing, and generating reports. The operation process is simple and easy to understand, and can be quickly mastered without professional training. The device has powerful data management functions, supporting local storage of test data, one click USB export, and cloud upload. It can automatically generate insulation characteristic curves, trend analysis reports, and compliance verification conclusions, making it convenient for operation and maintenance personnel to trace detection records, analyze hidden danger trends, and develop targeted operation and maintenance plans. In addition, the device adopts a dual power supply mode, supporting both built-in lithium battery power supply and external power supply. It can work continuously for more than 6 hours when fully charged, meeting the needs of outdoor long-term detection.
With excellent safety performance, comprehensive detection functions, and reliable quality, the JW-J25 insulation resistance tester has been widely used in photovoltaic power plant installation and acceptance, regular maintenance, fault diagnosis, safety audit, and renovation of old power plants in all scenarios. During the construction phase of the power station, the insulation and grounding performance of electrical equipment can be strictly inspected to prevent the delivery of unqualified projects; During the operation and maintenance phase, regular inspections of electrical safety status can be conducted to promptly identify potential hazards and prevent safety accidents; During the renovation phase of old power stations, a comprehensive assessment of the electrical system safety status can be conducted to provide a basis for the renovation plan. At present, the equipment has been put into use in numerous photovoltaic power plant projects in China, and has gained high trust and recognition from customers due to its stable performance, accurate detection results, and comprehensive safety protection.
Jiangsu Jingwei Technology Co., Ltd. always adheres to the development concept of "safety first, quality first, and technological leadership", focusing on the research and development, production, and sales of photovoltaic electrical safety testing equipment, and is committed to providing safe, reliable, and efficient testing solutions for the photovoltaic industry. In the future, Jiangsu Jingwei will continue to focus on technological innovation in the field of photovoltaic electrical safety, continuously optimize product performance, enhance product safety and intelligence, help photovoltaic power plants build a full cycle electrical safety protection system, ensure the safety, stability, and sustainable development of the photovoltaic industry, and lay a solid foundation for global green energy.
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