Photovoltaic power plants are exposed to complex outdoor environments for a long time, and components, cables, combiner boxes, inverters, and other equipment are easily affected by moisture, aging, corrosion, external damage, etc., leading to a decrease in insulation performance and causing safety accidents such as leakage, short circuits, and fires, seriously threatening the safety of power plant equipment and personnel. Jiangsu Jingwei Technology Co., Ltd. focuses on the electrical safety testing needs of photovoltaic systems. With direct current high voltage testing technology and precision sampling technology, we have independently developed and launched the JW-J25 insulation resistance tester. This high-precision electrical safety testing equipment designed specifically for photovoltaic systems has the core advantages of precise measurement, multiple protections, intelligent analysis, portability, and durability. It provides reliable technical support for insulation performance testing and safety inspections of photovoltaic systems, and builds a solid defense line for safe operation of power stations. Leakage current tes
The electrical safety of photovoltaic systems is of paramount importance in the operation and maintenance of power plants. Insulation resistance, as the core indicator for evaluating the insulation performance of electrical equipment, has a direct impact on the accuracy and reliability of its detection, which directly affects the safety of power plants. Traditional insulation testing equipment often has problems such as single voltage output, insufficient accuracy, weak safety protection, complex operation, and inconvenient data management, which make it difficult to meet the insulation testing needs of photovoltaic systems under high voltage, high current, and complex working conditions. The Jiangsu Jingwei R&D team has directly targeted industry pain points by integrating adjustable step high voltage output technology, precision sampling system, and multiple safety protection designs. They have successfully developed the JW-J25 insulation resistance tester, which is suitable for the insulation detection needs of photovoltaic modules, DC cables, combiner boxes, inverters on the DC side, and other equipment, achieving the detection goals of "safety, accuracy, efficiency, and convenience".
The multiple safety protection design of JW-J25 insulation resistance tester ensures zero risk during the testing process. The equipment is designed with a fully enclosed high-voltage generation module based on the high-voltage characteristics of photovoltaic systems. It is equipped with multiple protective resistors, overvoltage protection, overcurrent protection, short circuit protection, leakage protection, overheating protection and other protective mechanisms, which can effectively prevent high-voltage leakage, equipment damage or personnel electric shock accidents. Support DC high voltage output, with adjustable step voltage function, can choose the appropriate voltage according to different detection objects, avoiding damage to equipment caused by high voltage or inaccurate detection caused by low voltage. At the same time, the device is equipped with intelligent self checking function, which automatically detects the device status, battery level, and whether the line connection is normal when turned on. When abnormal, it will automatically alarm and shut down, avoiding safety risks from the source and ensuring safe and reliable detection.
Ultra high measurement accuracy and comprehensive detection capabilities meet the full scene detection needs of photovoltaic systems. The equipment adopts a precision sampling system and high-precision measurement chip, with a wide range of insulation resistance measurement, capable of measuring insulation resistance up to 5000G Ω with industry-leading accuracy. It can accurately measure the insulation resistance and grounding continuity of photovoltaic modules, cables, and busbars, and comprehensively evaluate the insulation performance of electrical systems. Equipped with polarization index (PI) and absorption ratio (DAR) analysis functions, it can automatically calculate and display relevant parameters, effectively diagnose hidden problems such as insulation aging, moisture penetration, material degradation, installation defects, etc., and provide scientific basis for insulation performance evaluation.
Portable and durable design with user-friendly operation experience, suitable for complex outdoor working conditions. The equipment adopts a lightweight and high-strength shell design, which is dustproof, waterproof, and anti drop. It is suitable for a wide temperature range of -10 ℃ to 50 ℃ and can operate stably in harsh outdoor conditions such as humidity, sand and dust, and high temperature.
The whole machine is lightweight, equipped with a portable handle and wear-resistant portable bag, making it easy to carry to any location on the power plant site, and can be operated by a single person. Equipped with high-definition digital display screen, real-time display of measured voltage, insulation resistance, testing time, PI/DAR values and other data, with clear and intuitive readings. The operation panel is simple and easy to understand, with Chinese button markings and one click start testing. There is no need for complex settings, and operation and maintenance personnel can quickly get started, greatly improving detection efficiency.
Intelligent data management and convenient traceability functions help digitize operations and maintenance. The device is equipped with a large capacity storage module, which can automatically store historical test data, support data query, review, and export, and facilitate data comparison, trend analysis, and traceability management for operation and maintenance personnel. Data can be transmitted to a computer through a USB interface to generate standardized test reports, compatible with Excel, PDF, and other formats for easy archiving, reporting, and sharing, meeting the needs of power plant operation and maintenance ledger management and third-party testing and acceptance.
The JW-J25 insulation resistance tester covers the entire lifecycle of photovoltaic systems and has outstanding value. During the installation and acceptance stage of the power station, it can be used for insulation testing of components, cables, inverters and other equipment after installation, to identify installation defects and ensure that the system meets safety standards; During the daily operation and maintenance inspection stage, insulation resistance can be regularly tested to promptly detect hidden dangers such as insulation aging, moisture, and damage, and to maintain and intervene in advance to avoid safety accidents; During the troubleshooting phase, it is possible to accurately locate the location and cause of insulation faults, guide maintenance and replacement, and reduce downtime losses; In the stage of equipment scrapping evaluation, insulation performance can be tested to determine whether the equipment can continue to be used and reduce operating costs.
Jiangsu Jingwei Technology Co., Ltd., as a professional enterprise in the field of photovoltaic testing equipment, always adheres to the development philosophy of "safety first, quality first, technological innovation, and value-added services". The company relies on a strong R&D team, deeply cultivates photovoltaic electrical safety testing technology, strictly follows industry standards such as GB/T 18216 and IEC 61557, establishes a full process quality control system from R&D, production, quality inspection to service, and ensures that every product has high precision, high safety, and high reliability.
The successful development and launch of the JW-J25 insulation resistance tester is an important milestone for Jiangsu Jingwei to deeply cultivate the field of photovoltaic electrical safety, and also an important practice for the company to help the safe and high-quality development of the photovoltaic industry. In the future, Jiangsu Jingwei will continue to focus on the safety and performance testing needs of photovoltaic systems, increase research and development investment, continuously optimize product performance, improve product matrix, enhance service level, work together with photovoltaic enterprises to safeguard the safe and stable operation of photovoltaic power plants, and promote the healthy and sustainable development of the global new energy industry.
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