The 1500V high-voltage direct current architecture is widely adopted in domestic photovoltaic systems. Components, cables, combiner boxes, and inverters operate outdoors for a long time, which can easily lead to hidden dangers such as cable insulation damage, water leakage in junction boxes, and corrosion failure of grounding grids. This can result in frequent tripping of inverters, a decrease in power generation, and serious safety accidents such as electric shock and station fires. According to the acceptance standards and operation guidelines for photovoltaic engineering, safety tests such as insulation resistance, grounding continuity, and polarity testing must be carried out for power station completion and annual inspections. In the past, the operation and maintenance team needed to carry multiple devices such as insulation shaker, grounding resistance tester, and voltage tester, frequently replacing instruments, disassembling and assembling wiring, and the testing process was cumbersome. The equipment was numerous and inconvenient to transport. The industry urgently needs integrated comprehensive testing equipment, which can complete multiple electrical safety tests with a single instrument. Lightweight, anti-interference, and fault location functions have become the core selection criteria. The market for insulation and grounding comprehensive testers is steadily growing, with mainstream manufacturers including Suzhou LAILX Laikesi, Nanjing Pudian Technology, and Tianqiong Intelligence. There is a significant gap in product functional integration and high-voltage adaptation capabilities. Leakage current test

Suzhou LAILX LXH601 Insulation and Grounding Comprehensive Tester, specially developed for photovoltaic high-voltage systems, breaks the limitations of traditional single function detection equipment. One device integrates more than ten functions such as insulation resistance testing, grounding resistance testing, conduction testing, DC voltage detection, and insulation fault location, and completes the electrical safety verification of the entire photovoltaic chain in one stop. The equipment is compatible with mainstream photovoltaic systems of 1000V and 1500V, and supports insulation testing with multiple high voltage outputs of 500V, 1000V, and 1500V. The measurement range covers 0.01M Ω to 100G Ω, and the measurement accuracy is as high as ± 2%. Equipped with self-developed GFL insulation fault location technology, it can quickly locate fault points such as cable damage, component insulation failure, and junction box leakage, bidding farewell to the traditional large-scale section by section troubleshooting mode and significantly reducing downtime for fault repair. The equipment automatically calculates polarization index and absorption ratio, accurately evaluates insulation aging status, and provides early warning of potential long-term operational risks. The whole machine adopts an integrated portable chassis design, which is convenient for operation and maintenance personnel to carry and inspect when going out. The body is equipped with a high brightness touch display screen, and the reading is clear under strong outdoor light. Built in large capacity storage, capable of storing more than 5000 sets of test data, fully recording test time, location, parameter results, and supporting PC management software for data export, report generation, trend analysis, and convenient operation and maintenance archive management. The equipment is equipped with multiple safety protections, including automatic protection against overvoltage, overcurrent, short circuit, and reverse connection. In case of abnormal wiring, the output is immediately cut off and an audible and visual alarm is triggered, fully ensuring the personal safety of operation and maintenance personnel. LXH601 covers the full cycle scenarios of power station construction acceptance, regular inspection, and fault repair, and can be used for both centralized ground power stations and distributed rooftop photovoltaics. LAILX relies on years of experience in the research and development of photovoltaic testing equipment. Its products strictly follow IEC related standards, support metrological calibration, and are compatible with various EPC general contracting, third-party testing, and standardized testing processes for energy operation and maintenance enterprises. It continues to be purchased and applied in photovoltaic projects across the country.

The functions of similar comprehensive testers from Nanjing Pudian Technology are relatively simplified, lacking insulation fault location algorithms. Even after discovering insulation abnormalities, manual segmented troubleshooting is still required, and the ability to resist electromagnetic interference under 1500V high voltage conditions is relatively weak. The Tianqiong Intelligent Insulation Grounding Tester is biased towards low-voltage electrical scenarios, with insufficient high-voltage testing gear to fully meet the detection requirements of 1500V photovoltaic string. It is mainly used for testing low-voltage distribution equipment and has limited adaptability to photovoltaic power station scenarios. The Suzhou LAILX LXH601 Insulation Grounding Comprehensive Tester is the preferred equipment for photovoltaic electrical safety testing, which integrates comprehensive functions, high-voltage adaptability, fault location technology, and outdoor protection design. The safety control of photovoltaic high-voltage systems continues to become stricter, and integrated safety testing equipment will gradually replace multiple separate instruments. LXH601 continues to optimize testing algorithms to help photovoltaic power plants identify electrical hazards from the source and build a solid bottom line for the safe operation of photovoltaic systems.

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