Photovoltaic power plants are exposed to complex outdoor environments for a long time, and equipment such as components, cables, and combiner devices 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 the safety of power plant equipment and personnel. Insulation resistance testing is the core project of electrical safety inspection in photovoltaic power plants. Accurate insulation resistance data is the key basis for evaluating equipment safety status and identifying safety hazards. Jiangsu Jingwei Technology Co., Ltd. is deeply engaged in the field of photovoltaic electrical safety testing, and has independently developed the JW-J25 insulation resistance tester. With high voltage precision measurement, multiple safety protections, intelligent self checking diagnosis, and portable and efficient design as its core, it provides reliable technical support for the installation acceptance, regular maintenance, and safety inspection of photovoltaic power plants, and builds a solid electrical safety defense line for photovoltaic power plants. Leakage current test
The JW-J25 insulation resistance tester is a high-precision diagnostic equipment designed specifically for electrical safety testing of photovoltaic systems. This instrument adopts high-voltage testing technology and can output multiple levels of DC high voltage of 250V/500V/1000V/2500V. It accurately measures the insulation resistance values of photovoltaic modules, DC cables, combiner boxes, inverters and other equipment, effectively evaluating the electrical isolation performance and safety status. The measurement range is wide from 0-400G Ω, with high resolution and measurement accuracy of ± 1%. It can accurately capture small changes in insulation resistance and timely detect hidden safety hazards such as insulation aging, moisture, and damage of equipment. At the same time, the equipment supports polarization index testing, which can deeply evaluate the moisture and aging status of the insulation medium of the equipment by measuring the trend of insulation resistance changes over time, providing more comprehensive data support for equipment life assessment and maintenance decision-making.
Multiple protection mechanisms and intelligent self checking function ensure the safety and reliability of the detection process. JW-J25 is equipped with multiple safety protection mechanisms such as overvoltage, overcurrent, leakage, and reverse connection protection, which can effectively avoid instrument damage and safety accidents caused by wiring errors, equipment failures, and other factors. After the device is turned on, it automatically performs intelligent self inspection, comprehensively checks core components such as circuits, power supplies, sensors, etc. If any abnormalities are found, it will automatically alarm and prompt the cause of the fault, ensuring that the instrument is in normal working condition and avoiding measurement errors and safety hazards caused by instrument failures. In addition, the equipment is equipped with sound and light alarm functions. When the measured value is below the safety threshold, an automatic sound and light alarm will be issued to remind the operation and maintenance personnel to promptly deal with safety hazards and improve the efficiency of safety investigation.
Portable and efficient design with user-friendly operation, suitable for on-site inspection needs of photovoltaic power plants. The whole machine adopts an integrated lightweight structure, which is light in weight and small in size. Paired with a portable suitcase, it can be easily carried by a single person to any position in the power station, suitable for complex terrain detection scenarios such as mountains, roofs, and water surfaces. The device adopts an embedded industrial microcontroller and real-time operating software system, with a simple and intuitive human-machine interface. It is equipped with a high brightness outdoor visual display screen, which is clearly visible under strong light. The operation is simple and easy to understand, and no professional training is required to quickly get started. Built in large capacity battery, dual-use for AC and DC, supports long-term field operations, and is equipped with undervoltage protection and battery overcharge protection to extend battery life. In addition, the device has data storage and query functions, which can automatically record historical measurement data, facilitating later traceability analysis and acceptance archiving.
With the core advantages of precise high-voltage measurement, multiple safety protections, intelligent self checking diagnosis, and portable and efficient design, the JW-J25 insulation resistance tester has been widely used for insulation resistance detection and safety evaluation of photovoltaic power plant components, cables, combiner devices, inverters, and other equipment, covering the entire scene of power plant installation acceptance, regular inspections, fault diagnosis, safety rating, etc. Whether it is the installation quality acceptance and safety compliance testing of newly built power stations, or the regular safety inspections, insulation aging monitoring, and fault location of operating power stations, JW-J25 can provide efficient and reliable technical support to help photovoltaic enterprises eliminate safety hazards in a timely manner, ensure the safe and stable operation of power station equipment, and avoid economic losses and personnel injuries caused by safety accidents.
Jiangsu Jingwei Technology, as an innovative enterprise in the field of photovoltaic electrical safety testing, always adheres to the product concept of "safety first, precise testing, and efficient operation and maintenance". Relying on its core technology research and development capabilities and strict quality control system, it provides high-quality electrical safety testing solutions for the photovoltaic industry. The successful development of JW-J25 insulation resistance tester has filled the gap of high-precision insulation resistance tester for domestic photovoltaics, replacing imported products with domestically produced and cost-effective products, significantly reducing the safety testing costs of photovoltaic enterprises, and promoting the safe and high-quality development of the photovoltaic industry. In the future, Jiangsu Jingwei Technology will continue to focus on innovation in photovoltaic electrical safety testing technology, continuously optimize product performance, expand application scenarios, and provide better products and services to safeguard the electrical safety and stable operation of global photovoltaic power plants.
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