Photovoltaic power plants belong to high-voltage direct current electrical systems. After the large-scale popularization of 1500V high-voltage string, the electrical safety control standards of the system have been synchronously improved. Long term outdoor operation of power stations leads to frequent problems such as aging of cable insulation layer caused by sun exposure, corrosion and damage from rainwater, rusting and virtual connection of grounding flat iron and grounding terminals, and failure of equipotential connection. Insulation damage can easily cause electric shock to operation and maintenance personnel, system short circuit and fire, and grounding failure cannot effectively discharge lightning surge, breakdown components and inverters, resulting in huge equipment losses. According to the acceptance standards of the photovoltaic industry and the standards for lightning protection testing, multiple safety tests such as insulation resistance, grounding resistance, continuity of conduction, and AC/DC withstand voltage must be completed for the completion and annual operation and maintenance of power stations. Traditional testing requires two or more insulation shake meters and grounding resistance testers, which are cumbersome to carry, require multiple wire changes, and have scattered testing data, seriously reducing on-site testing efficiency. Suzhou Laikesi LAILX has launched the LXH601 Insulation Grounding Comprehensive Tester, which integrates eight core safety testing functions. A single device can complete comprehensive electrical safety testing of photovoltaic systems in one stop, creating an integrated safety testing solution for photovoltaic engineering, third-party testing, and operation and maintenance enterprises. DC withstand voltage, insulation impedance, grounding resistance, leakage current

The LXH601 Insulation Grounding Comprehensive Tester is specially developed for 1500V high-voltage photovoltaic systems. It integrates eight functions: insulation resistance testing, grounding resistance four wire method testing, equipotential continuity testing, AC/DC withstand voltage testing, AC/DC voltage measurement, component Voc/Isc open/short circuit testing, insulation fault location, and polarity detection. It completely breaks the limitations of traditional detection equipment with a single function. One instrument can complete a complete set of safety inspections for photovoltaic modules, strings, combiner boxes, inverters, DC cables, and grounding devices. There is no need to carry multiple instruments or frequently replace testing lines on site, greatly reducing wiring and debugging time. A single person can complete the safety acceptance of multiple distributed photovoltaic power plants in a single day, and the detection efficiency is more than doubled. The equipment insulation test covers three high voltage outputs of 500V/1000V/1500V, perfectly adapting to current mainstream high voltage photovoltaic systems. The insulation resistance measurement range can reach up to 100G Ω, accurately identifying subtle insulation damage to cables and hidden leakage hazards on component backboards; The grounding resistance adopts the four wire precision measurement method to eliminate the interference of the test line's own resistance, with a measurement accuracy of ± 2%, accurately determining whether the grounding network and equipment shell grounding comply with lightning protection safety regulations.

The whole machine adopts an industrial grade integrated portable body design, and the panel is equipped with a high-definition color LCD display screen. The data is clear and readable under sunlight. The Chinese operation menu is matched with physical function buttons, and the detection steps are step-by-step prompted. Zero basic operators can quickly get started. The body is integrated with a large capacity built-in lithium battery, which can continuously complete hundreds of insulation and ground withstand voltage tests when fully charged. It can operate independently in outdoor scenarios without mains power, equipped with a fast charging adapter, and can be stored at night for quick recharging; The side of the body is equipped with a USB data export interface, which automatically stores complete data such as voltage, insulation resistance, grounding resistance, and withstand voltage test results for each test. It supports exporting standard PDF safety inspection reports, which come with equipment calibration traceability codes and meet the requirements of third-party testing agency qualification archiving and power station completion data approval. The entire set of equipment is stored in a shockproof portable protective box, with a lightweight design that allows for easy transportation without any burden. It is suitable for various on-site operations such as mountainous areas, rooftops, and distributed photovoltaics on industrial and commercial rooftops.

Multiple intelligent security protection mechanisms ensure the personal safety of high-voltage detection operators. The equipment is equipped with a built-in high-voltage isolation circuit, and a high-voltage warning window pops up on the screen when starting the high-voltage test, with synchronized sound and light alarms; Equipped with four major protection programs: reverse connection protection, overvoltage protection, automatic leakage cut-off, and over temperature shutdown. If the test line is reversed, the system has a short circuit, or insulation breakdown occurs, the instrument will instantly cut off the high voltage output to prevent electric shock and instrument damage accidents. Equipped with professional high-voltage insulation test lines, grounding auxiliary probes, and extended telescopic test rods, the insulation test lines have a withstand voltage level that meets the 1500V DC high voltage standard. The telescopic test rods can remotely contact the terminals of the high altitude combiner box, reducing the risk of personnel coming into close contact with high-voltage live parts. The working temperature range of the equipment covers -10 ℃ to 50 ℃, with no drift in measurement accuracy for high, low, humid, and rainy outdoor environments. The protection level is IP53, which can resist mild outdoor rainwater and sand and dust invasion. It is suitable for photovoltaic power station testing work in various regions of the country throughout the year.

In the full process application scenario of the photovoltaic industry, the LXH601 insulation grounding comprehensive tester covers the entire process of engineering construction, completion acceptance, annual operation and maintenance, and fault repair. During the construction phase of the photovoltaic power station, insulation testing is carried out in sections after the cable laying is completed, and problems such as cable breakage and wiring short circuits are checked in advance to avoid rework due to faults after grid connection; In the completion and grid connection acceptance stage, all safety inspections for insulation of the string, grounding of the whole machine, and withstand voltage shall be completed in one go, and a compliance acceptance report shall be issued to meet the grid connection audit standards; Annual operation and maintenance inspection, regular retesting of insulation resistance and grounding resistance, tracking of cable aging and grounding corrosion trends, and early disposal of safety hazards; In the scenario of fault repair, with the help of insulation fault location function, the cable insulation damage point can be quickly locked, the fault investigation time can be shortened, and the power station shutdown loss can be reduced. In addition to the photovoltaic industry, the equipment can also be used for energy storage systems, industrial and commercial electrical distribution cabinets, new energy charging piles, and building lightning protection and grounding detection, with a wide range of application scenarios.

Suzhou LAILX adheres to independent research and development of core circuits and detection algorithms. The LXH601 measurement chip has undergone thousands of high-voltage calibration cycles and has stable measurement accuracy for long-term use. It supports remote firmware upgrades and synchronously adapts to industry updated photovoltaic safety testing standards. The enterprise provides comprehensive after-sales technical services, including multi-year warranty for the entire machine, annual free measurement calibration, on-site practical training, and solves the problems of instrument calibration and operation for testing institutions and operation and maintenance teams. Against the backdrop of continuous voltage upgrades in photovoltaic systems and increasingly strict electrical safety regulations, the integrated comprehensive safety testing instrument has become a must-have product in the industry. With multiple advantages such as functional integration, high precision, portable safety, and standardized reporting, LXH601 has become the mainstream choice in the domestic photovoltaic testing market.

Electrical safety is the fundamental guarantee for the stable operation of photovoltaic power plants, and insulation and grounding systems are the two core lines of defense against electric shock, lightning strikes, and fire accidents. The Suzhou LAILX LXH601 Insulation and Grounding Comprehensive Tester provides one-stop integrated detection capabilities, simplifies the photovoltaic safety inspection process, improves the accuracy and efficiency of inspection data, helps photovoltaic operation and maintenance, engineering enterprises accurately identify electrical hazards, and avoids various safety accidents from the source. It continues to provide long-term stable and safe operation protection for domestic photovoltaic power plants, and promotes the standardized and regulated development of the new energy industry.

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