Photovoltaic power plants are exposed to complex outdoor environments for a long time, such as rainwater infiltration, cable aging, component packaging damage, bracket grounding failure, and water ingress into junction boxes, which can easily cause damage to the insulation layer of the circuit, resulting in major safety accidents such as leakage, short circuit to ground, personal electric shock, inverter burnout, and hot spot ignition. Insulation resistance testing is a mandatory testing item for the completion acceptance, annual safety inspection, and fault diagnosis of photovoltaic power plants. However, traditional insulation testers are bulky, have complicated wiring, unstable high-voltage output, and some simple equipment lacks dedicated testing gears for photovoltaics. They cannot adapt to high-voltage string and component frame insulation testing, and there is great inconvenience in operating high-altitude roofs and decentralized household photovoltaic sites. In response to the special requirements for photovoltaic electrical safety testing, Jiangsu Jingwei Technology has independently developed the JW-J25 portable insulation resistance tester, customized with photovoltaic exclusive high-voltage testing gear, lightweight handheld body, integrated safety protection, data storage, and one click reporting functions, becoming a standard tool for photovoltaic station electrical safety inspection. Leakage current test
The JW-J25 machine adopts a handheld integrated body design, with an anti slip and flame-retardant shell, and can be operated with one hand. The weight of the whole machine is only 1.1kg, and it is equipped with a portable canvas storage bag, which can be carried synchronously with the operation and maintenance tool kit. It can be flexibly operated on roofs, mountains, and narrow spaces for household use. The protection level of the equipment body is IP54, which is dustproof, waterproof, and anti fall. It can be tested normally under outdoor rain, snow, and dust conditions. The side of the body is equipped with insulation protection anti slip rubber pads, which effectively reduces the risk of electric shock for operators during high-voltage testing. It is also equipped with insulation extension test probes, suitable for long-distance wiring in high-altitude groups, and does not require climbing close to high-voltage cables, improving the safety factor of field operations. The power supply adopts large capacity rechargeable lithium batteries, which can withstand high voltage testing for 8 hours in a fully charged state, meeting the insulation inspection of the entire station throughout the day. Remote stations without power supply do not require external mains power.
JW-J25 is customized with multiple levels of high voltage output for the photovoltaic industry, with three dedicated testing voltages of 500V, 1000V, and 1500V. It perfectly adapts to the insulation testing needs of household low voltage components, industrial and commercial distributed 1000V string, and large ground 1500V high voltage photovoltaic arrays. The output high voltage is stable without fluctuations, and the measured insulation resistance range covers 0.01M Ω~100000M Ω. It has high resolution and can accurately capture hidden leakage hazards such as cable micro insulation damage and slight water leakage in component packaging that are not easy to detect. The device is equipped with an intelligent boost and voltage stabilization module, which ensures a smooth and impact free boost process without damaging component diodes or precision electrical components of the inverter. It is different from the problem of component damage caused by instantaneous high-voltage impact in cheap devices on the market, and balances detection accuracy and equipment safety.
Multiple safety protection mechanisms ensure the personal safety of operators in all aspects. The JW-J25 is equipped with a triple protection system including real-time grounding monitoring, residual voltage release, and automatic power-off due to overvoltage and overload. After the test is completed, the equipment automatically releases the residual high voltage of the line to eliminate the risk of electric shock caused by cable storage after the test is completed; If there is a short circuit or excessive leakage in the detection process, the equipment will instantly cut off the high voltage output and sound and light an alarm, and the screen will pop up to indicate the fault location; The body insulation shell, double-layer insulation probes, and anti drop wiring terminals provide multiple physical protections, which comply with the national power safety testing standards and fully meet the high-risk operation specifications for high-altitude and humid environments.
Intelligent data management simplifies the detection and archiving process, with a high-definition backlit LCD display screen that clearly displays real-time insulation resistance, test voltage, test duration, and real-time leakage current values under strong light. Support single key local storage of thousands of sets of detection data, with each record automatically labeled with test voltage, detection point location, and timestamp, distinguishing multiple detection scenarios such as component frame to ground, string positive and negative pole to ground, combiner box cable, and inverter DC side. Equipped with Bluetooth wireless transmission function, data synchronization to mobile terminals, automatic generation of photovoltaic insulation safety testing reports, which can be directly used for power station grid connection acceptance, power safety supervision inspection, annual operation and maintenance safety archiving, without manual handwriting recording, greatly improving testing compliance and work efficiency.
The product is suitable for full scene photovoltaic electrical safety testing: insulation acceptance before grid connection of photovoltaic power stations, annual routine safety hazard troubleshooting, general survey of line leakage after rainstorm/snowstorm disaster, aging detection of old distributed photovoltaic cables, household roof photovoltaic door-to-door safety verification, insulation monitoring of integrated energy storage photovoltaic system, combiner box, inverter DC circuit insulation test. By regularly using JW-J25 for insulation screening, the risk of insulation failure in cables and components can be predicted in advance, preventing safety accidents such as leakage and fire, equipment short circuit and burnout from the source, and significantly reducing the cost of power station operation and maintenance safety and claims losses.
Electrical insulation safety is the bottom line for the stable operation of photovoltaic power plants. Jiangsu Jingwei JW-J25 insulation resistance tester is based on the exclusive testing scenarios of the photovoltaic industry, balancing the four core requirements of portability, high-voltage stability, operational safety, and data compliance, filling the gap in the subdivision of outdoor high-voltage insulation portable testing equipment. Jiangsu Jingwei continues to deepen the research and development of photovoltaic electrical safety testing instruments, creating insulation IV、EL、 The complete testing product system for irradiation and meteorological stations provides comprehensive safety and performance testing support for new energy stations. In the future, enterprises will continue to upgrade their equipment's intelligent warning function, collaborate with the cloud to achieve long-term trend analysis of insulation data, and help the photovoltaic industry build a normalized electrical safety inspection system.
Leakage current test, AC/DC withstand voltage insulation grounding tester, AC/DC withstand voltage insulation resistance grounding resistance conductivity tester
