Photovoltaic power plants are exposed to complex outdoor environments for a long time, and the insulation layers of components, cables, inverters, and other equipment are prone to insulation resistance reduction due to aging, moisture, corrosion, physical damage, etc., which can lead to leakage, short circuits, equipment burnout, and even safety accidents such as fires and personnel electric shocks, seriously threatening the safe and stable operation of the power plant. Jiangsu Jingwei Technology Co., Ltd. focuses on the core requirements of electrical safety testing for photovoltaic systems and innovatively develops the JW-J25 insulation resistance tester. The device is centered around high-precision measurement, multiple safety protections, and portable intelligent design. It accurately detects the insulation resistance of photovoltaic equipment, comprehensively evaluates the electrical safety status, and provides reliable technical support for the installation acceptance, regular maintenance, and safety audit of photovoltaic power plants, building a solid defense line for the electrical safety operation of photovoltaic power plants. Multi functional comprehensive electrical appliance
The JW-J25 insulation resistance tester adopts advanced high-voltage testing and high-precision measurement technology, with industry-leading measurement accuracy and reliability. The device is equipped with a high-performance high-voltage generation module, providing multiple testing voltages of 500V, 1000V, 2500V, and 5000V, suitable for insulation testing needs of different equipment such as photovoltaic modules, DC cables, inverters, and grounding systems. The measurement range of resistance is 0-200G Ω, with a resolution of 0.1M Ω and a measurement error of less than ± 1.5%. It can accurately capture small changes in insulation resistance and promptly detect hidden dangers such as insulation layer aging and damage. Adopting the four wire Kelvin measurement technique, the interference of contact resistance is completely eliminated, ensuring that the measurement data truly reflects the insulation performance of the equipment and avoiding misjudgment. The device has an automatic range switching function, which can automatically match the range according to the resistance value of the measured object without manual adjustment, simplifying the operation process. Simultaneously equipped with a high-precision clock and data acquisition module, it can accurately record testing time, voltage, and resistance values, facilitating data traceability and analysis.
Multiple safety protection designs ensure the safety of testing operations and adapt to the testing needs of photovoltaic high-voltage systems. JW-J25 has designed a comprehensive safety protection mechanism for the high-voltage characteristics of photovoltaic systems: the high-voltage output end has short-circuit protection, overcurrent protection, and leakage protection functions. In case of abnormal situations such as short circuit or leakage, the equipment will instantly cut off the high-voltage output to protect the safety of equipment and personnel. Equipped with high-voltage warning lights and buzzers, the high-voltage indicator light remains on during the testing process, and the buzzer intermittently alarms to remind operators to stay away from the high-voltage testing end and avoid the risk of electric shock. The equipment casing is made of high-strength insulation material, with an insulation level of Class II, which can resist high voltage impact and prevent personnel from electric shock caused by equipment leakage. Equipped with residual high voltage discharge function, it automatically releases the residual high voltage of the tested equipment after the test is completed, without the need for manual discharge, further improving operational safety. At the same time, the equipment has passed strict electromagnetic compatibility testing and has strong anti-interference ability. It can work stably in complex electromagnetic environments, avoiding measurement errors or equipment failures caused by electromagnetic interference.
Portable and intelligent design, improve detection efficiency, and adapt to the complex outdoor scene operation needs. The JW-J25 whole machine adopts a lightweight structural design, weighing only 4.5kg, with a small size, and is equipped with a dedicated portable case. The accessories are neatly stored, making it easy for a single person to carry to various photovoltaic power plant sites such as rooftops, mountains, deserts, etc. The equipment adopts industrial grade protection design with a protection level of IP54, which can resist outdoor dust and rainwater invasion, adapt to extreme temperature environments ranging from -10 ℃ to 50 ℃, and meet the long-term outdoor operation needs. Equipped with a high-definition LCD display screen, a fully Chinese operating interface, simple and intuitive, and reasonable button layout, it can be quickly operated without professional training. Built in intelligent data analysis system that can automatically calculate absorption ratio and polarization index to assist in determining insulation moisture, aging and other issues; Support one click storage of test data, with built-in 8GB storage capable of storing 100000 test records. The data can be exported in Excel format for easy archiving and analysis. Integrated Bluetooth wireless transmission module, test data can be synchronized to mobile APP, supports remote viewing and report generation, and improves work efficiency.
Full scenario application, value runs through the entire lifecycle of photovoltaic power plants. During the installation and acceptance stage of the power station, insulation resistance tests are conducted on components, DC cables, inverters, grounding systems, etc. to identify issues such as insulation layer damage and wiring errors during installation, ensuring that the electrical system of the power station meets safety standards and is safely connected to the grid; During the daily operation and maintenance phase, regular insulation resistance inspections should be carried out to promptly detect hidden dangers such as insulation aging, moisture, and corrosion. Maintenance and replacement should be carried out in advance to avoid safety accidents and ensure the stable operation of the power station; In the troubleshooting stage, for faults such as leakage and short circuit, insulation resistance testing is used to quickly locate the fault location, shorten the fault repair time, and reduce the loss of power generation; During the security audit and compliance inspection phase, provide accurate and complete insulation testing data to meet industry safety standards and regulatory requirements, and avoid compliance risks.
At present, JW-J25 has been widely used in various photovoltaic power plants, operation and maintenance enterprises, and testing institutions in China. Actual feedback shows that the equipment can improve the efficiency of electrical safety hazard investigation by more than 50%, and the accuracy of hazard identification reaches 98%, effectively reducing the incidence of power plant safety accidents.
Jiangsu Jingwei Technology Co., Ltd. is deeply engaged in the field of photovoltaic electrical safety testing, always adhering to the concept of "safety first, precision based, and innovation as the soul", and providing high-quality testing equipment for the photovoltaic industry. The successful development of JW-J25 insulation resistance tester is an important breakthrough for the company in the field of electrical safety testing technology, providing reliable guarantee for the electrical safety of photovoltaic power plants. In the future, Jiangsu Jingwei will continue to increase research and development investment, continuously optimize product performance, improve safety protection levels, expand application scenarios, and safeguard the safe, stable, and high-quality development of the photovoltaic industry, helping the industry achieve healthy and sustainable development.
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