Photovoltaic power plants belong to high-voltage direct current electrical systems. Components, strings, combiner boxes, and inverters are exposed to outdoor humidity, dust, lightning strikes, and high and low temperature environments for a long time, which can easily lead to electrical hazards such as cable insulation layer damage, junction box water leakage, grounding device corrosion and virtual connection, and ground leakage. In mild cases, the inverter frequently shuts down due to protection, and the power generation is greatly reduced. In severe cases, it can cause electric shock to operation and maintenance personnel, equipment burnout, lightning strike breakdown, and even fire accidents. According to the IEC61730 photovoltaic safety standard and the lightning protection testing specifications for the completion acceptance of photovoltaic power stations, multiple safety inspections must be carried out for insulation resistance, grounding continuity, voltage resistance, and fault location during the delivery and annual operation and maintenance of the power station. Traditional inspections require the use of three devices: insulation shaker, grounding resistance tester, and voltage resistance tester, which are cumbersome to carry, require repeated disassembly and assembly of wiring, and have scattered testing data that is difficult to archive uniformly, seriously reducing on-site inspection efficiency. Suzhou LAILX targets the pain points of multiple equipment testing in the industry, independently developing LXH601 insulation grounding comprehensive tester, integrating more than ten photovoltaic electrical safety inspection functions, completing the safety verification of all types of photovoltaic equipment in one machine, adapting to 1500V high-voltage photovoltaic systems, and balancing high precision, portability, and intelligence. It has become an essential electrical safety testing equipment for photovoltaic EPC, third-party testing, and power station operation and maintenance enterprises. DC withstand voltage, insulation impedance, grounding resistance, leakage current

The core innovation advantage of LXH601 is its high integration of multiple functions, breaking the limitations of traditional detection equipment with a single function. A single instrument fully covers all safety testing projects of photovoltaic systems, including multi level insulation resistance testing, grounding resistance testing, grounding continuity verification, AC/DC voltage withstand testing, positive and negative pole to ground insulation DUAL synchronous testing, accurate insulation fault location, open circuit and short-circuit voltage and current detection, leakage current measurement, circuit impedance testing, and more than ten other functions. It fully meets all the requirements of EN62446 and IEC61557 photovoltaic electrical safety testing standards. In traditional testing operations, workers need to alternately replace three instruments, repeatedly disassemble and assemble string connections, and complete safety testing of a single high-voltage string takes more than 20 minutes; Using LXH601 only requires one wiring, and the detection mode can be switched on the screen to complete the full set of insulation, grounding, and voltage withstand tests within 8 minutes. A single person can independently complete the operation without the need for multiple people to cooperate and assist. The safety inspection cycle of large ground power stations is directly shortened by 60%, greatly reducing on-site labor and time costs. The equipment is specifically designed to adapt to the current mainstream 1500V high-voltage photovoltaic architecture, with four levels of programmable output for insulation testing voltage settings of 250V, 500V, 1000V, and 1500V, covering the full scene detection needs of household low-voltage distribution, industrial and commercial 1000V systems, and large ground 1500V high-voltage string. It can adapt to photovoltaic projects of different voltage levels without replacing accessories.

Dual channel synchronous detection and precise fault location technology for insulation DUAL, targeting the difficulties in troubleshooting insulation faults in photovoltaic strings. If the insulation of the positive and negative terminals of a photovoltaic string is damaged to the ground, a leakage circuit will be formed. Traditional insulation testers can only measure abnormal insulation resistance as a whole, and cannot distinguish which side of the positive and negative electrodes is damaged. Operation and maintenance personnel need to dismantle the wires and test them section by section, and the troubleshooting process is cumbersome. The LXH601 is equipped with a dedicated DUAL synchronous detection mode, which can simultaneously collect two sets of insulation resistance values for positive and negative poles to ground. The screen displays two sets of data synchronously in split screens, allowing for intuitive judgment of fault polarity; Equipped with built-in fault location algorithm, it automatically outputs segmented detection guidance when insulation resistance is abnormal, accurately locks the fault zone, quickly locates fault points such as cable damage, junction box water leakage, component frame leakage, etc., greatly shortens the fault repair time, and reduces power station shutdown losses. The measurement accuracy of insulation resistance can reach ± 2%, the measurement range of grounding resistance is 0.01 Ω to 2000 Ω, the withstand voltage output current is stable and controllable, and all measurement indicators meet the accuracy standards of national third-party testing laboratories. The test data can be directly used to issue compliance completion acceptance test reports, meeting the qualification requirements for project audit and grid connection acceptance.

The outdoor portable safety design is fully adapted to the working conditions of photovoltaic field operations. The whole machine is equipped with an integrated industrial protective chassis, which is impact resistant and IP65 waterproof and dustproof. It can operate stably in extreme temperatures ranging from -20 ℃ to 65 ℃, and can operate stably in harsh environments such as northwest deserts, rainy mountains in the south, and water-based photovoltaics; The weight of the whole machine is controlled within 7kg, and it is equipped with a customized shockproof suitcase. It can be carried by a single person for easy transportation in areas that cannot be reached by vehicles such as roofs and mountains. The device is equipped with a large capacity rechargeable lithium battery, which can continuously complete a full set of safety inspections for 150 strings without external power supply. Remote stations do not need to carry a generator for power supply; The whole machine is equipped with multiple high-voltage safety protections, including automatic locking of high-voltage output, instantaneous cut-off of overpressure and overload, and anti misoperation insulation test probe. Real time circuit monitoring is carried out throughout the operation, and in case of wiring errors or ground short circuits, sound and light alarms are immediately triggered to avoid the risk of high-voltage electric shock from the hardware level, ensuring the safety of high-voltage detection operations for operation and maintenance personnel in all aspects. The high-definition color touch screen displays clearly under strong light, with a fully Chinese operating interface and simple and intuitive functional zoning. Zero basic operators can operate independently after a brief training, reducing the threshold for using enterprise equipment.

The intelligent data management system enables traceability of the entire detection process. The local high-capacity storage chip of the device can store tens of thousands of complete detection data, and each set of data synchronously records complete information such as detection voltage, insulation resistance, grounding resistance, withstand voltage results, detection time, equipment number, etc; Supports two data export modes: USB wired and Bluetooth wireless. Equipped with professional analysis software on the PC end, it automatically summarizes all string detection data, generates standardized Excel detection reports and PDF acceptance reports, and supports long-term data archiving and comparison. Operation and maintenance personnel can regularly retest the power station every year, compare the trend of insulation and grounding data changes over the years, predict the aging speed of cables and grounding devices, develop preventive maintenance plans, and avoid power generation losses and safety accidents caused by sudden faults. The device also supports barcode scanning to input string numbers, achieving one-to-one correspondence between each string detection data, making it clear and convenient for large-scale power plants to trace faults and allocate responsibilities in the later stage.

From the perspective of application scenarios, LXH601 covers the entire process of electrical safety testing requirements in the photovoltaic industry. During the grid connection and completion acceptance stage of photovoltaic power plants, third-party testing agencies use equipment to complete a complete set of safety inspections for the entire station's string, combiner box, and inverter, and issue legally binding electrical safety inspection reports as core materials for grid connection and project delivery settlement; In the annual operation and maintenance inspection of existing power stations, the operation and maintenance team regularly conducts insulation and grounding inspections to promptly identify hidden leakage and grounding failure hazards, ensuring the stable and safe operation of the power station throughout the year; In the quality inspection process of component and inverter manufacturing enterprises, it is used for electrical safety sampling of finished products, controlling the insulation and grounding performance of products, and preventing unqualified electrical equipment from entering the market; In the testing scenario of photovoltaic energy storage supporting systems, insulation and voltage resistance testing of energy storage battery cabinets and energy storage inverters can be completed simultaneously, and a complete set of safety regulations verification can be carried out to adapt to integrated photovoltaic energy storage projects.

With the popularization of photovoltaic high-voltage systems, electrical safety accident prevention and control have become the core focus of industry management, and multifunctional integrated safety testing equipment is gradually replacing traditional multiple discrete instruments. The Suzhou LAILX LXH601 Insulation Grounding Comprehensive Tester has four core advantages: multi energy, high voltage adaptation, fast fault location, and portable safety. It solves the industry pain points of low efficiency, cumbersome equipment, and difficult fault diagnosis in photovoltaic electrical testing, and provides standardized and high-precision electrical safety testing solutions for the entire photovoltaic industry chain. In the future, LAILX will continue to upgrade equipment algorithms, expand 4G remote data upload and cloud report management functions, synchronously improve equipment measurement calibration, on-site technical guidance and supporting services, continue to deepen the field of photovoltaic electrical safety testing, and safeguard the long-term stable, safe and efficient operation of various photovoltaic power stations across the country.

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