Photovoltaic power plants are exposed to complex outdoor environments for a long time, and equipment such as components, cables, and combiner boxes are prone to insulation performance degradation due to aging, moisture, and damage, which can lead to safety accidents such as leakage, short circuits, and fires, posing a threat to personnel safety and power plant property safety. Insulation resistance testing is the core project of photovoltaic electrical safety testing. Traditional testing equipment has low accuracy, poor safety, and cumbersome operation, making it difficult to adapt to the testing needs of photovoltaic high-voltage systems. Jiangsu Jingwei Technology Co., Ltd. focuses on the pain points of photovoltaic electrical safety and independently develops the JW-J25 insulation resistance tester. With high voltage, high precision, multiple safety protections, and portable intelligent design, it provides comprehensive protection for the electrical safety of photovoltaic power plants and becomes the "safety guardian" of power plant safety operation and maintenance. DC withstand voltage, insulation impedance, grounding resistance, leakage current
JW-J25 is a high-precision diagnostic equipment developed specifically for electrical safety testing of photovoltaic systems, adapted to the testing needs of 1500V high-voltage 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, cables, combiner boxes, inverters and other equipment, and comprehensively evaluate the electrical safety status. The equipment provides four testing voltages of 250V, 500V, 1000V, and 1500V, covering the full voltage level detection requirements of photovoltaic systems. The insulation resistance measurement range reaches 0~100G Ω, and the measurement accuracy reaches * * ± 5%. It can accurately identify hidden dangers such as insulation aging, damage, moisture, and wiring errors, and avoid safety accidents caused by insulation faults. Support polarization index (PI) and absorption ratio (DAR) testing * *, which can deeply evaluate the degree of moisture and aging of insulation media, providing scientific basis for predicting insulation life.
Security protection design is the core advantage of JW-J25, providing comprehensive protection for the safety of operators and equipment. The device is equipped with multiple safety protection mechanisms, including overvoltage, overcurrent, short circuit, and reverse connection protection functions. It can automatically identify abnormal test circuits, instantly cut off high-voltage output, and avoid equipment damage and personnel electric shock risks. Adopting a high-voltage isolation design, the testing end is electrically isolated from the operating end to prevent high-voltage leakage; Equipped with a sound and light alarm system, if the insulation resistance falls below the safety threshold during the testing process, an immediate sound and light alarm will be issued to remind operators to promptly address potential hazards. The body adopts an insulated protective shell, which is anti slip and anti electric shock, suitable for harsh outdoor environments such as humidity and high temperature, ensuring operational safety. Through multiple safety certifications, it meets the electrical safety testing standards of the photovoltaic industry and can be used with confidence for safety testing of various photovoltaic power plants.
Portability and intelligent design greatly improve detection efficiency and convenience. The device adopts a lightweight and compact design, with a light weight and small size. It is equipped with a portable suitcase, which can be easily carried by a single person to any position in the power station. It is suitable for complex scene detection such as roofs, mountains, and deserts. Equipped with a high-definition Chinese LCD screen, it displays real-time data such as test voltage, insulation resistance, and test time. The interface is clear and intuitive, and the operation buttons are simple and easy to understand, making it easy for beginners to quickly get started. Support one click automatic testing without complex parameter settings. After startup, the testing, data calculation, and result judgment are automatically completed. After the testing is completed, the data is automatically stored for easy subsequent query and export. Equipped with a large capacity lithium battery, it can be tested continuously for more than 50 times when fully charged. It supports both AC and DC power supply and is suitable for outdoor scenarios without mains power, ensuring long-term continuous testing.
From the perspective of application scenarios, JW-J25 covers the full lifecycle safety testing requirements of photovoltaic power plants. During the installation and acceptance stage of the power station, comprehensive insulation tests can be conducted on components, cables, and grounding devices to identify wiring errors, insulation damage, poor grounding, and other issues during the installation process, ensuring the safe grid connection of the power station; In daily operation and maintenance inspections, insulation testing can be conducted regularly on key equipment to promptly detect hidden dangers such as insulation aging, moisture, and damage. Maintenance and replacement can be carried out in advance to avoid safety accidents; In the troubleshooting stage, if there are problems such as leakage, tripping, or abnormal power generation in the power station, the insulation fault point can be quickly located, the scope of investigation can be narrowed, and the efficiency of fault handling can be improved; After maintenance and renovation of the power station, insulation performance re inspection can be carried out to ensure electrical safety standards are met and normal operation is restored.
Jiangsu Jingwei Technology Co., Ltd., as a professional enterprise in the field of photovoltaic testing, always regards "safety, precision, and reliability" as the core of product research and development. Relying on profound technological accumulation, we create a safety testing equipment Shuidi Credit that is suitable for the photovoltaic industry. The JW-J25 insulation resistance tester, with its comprehensive advantages of high voltage, high precision, multiple safety protections, and portable intelligence, solves the core pain points of photovoltaic electrical safety testing and provides solid guarantees for the safe operation of photovoltaic power plants throughout their entire lifecycle. In the future, Jiangsu Jingwei will continue to deeply cultivate the field of photovoltaic electrical safety, continuously innovate technology, optimize product safety performance and detection accuracy, and provide better products and services to help photovoltaic power plants operate safely, stably, and efficiently, safeguarding the healthy development of the photovoltaic industry.
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