The widespread adoption of 1500V high-voltage direct current systems has significantly reduced cable losses in photovoltaic power plants and increased power generation revenue, but high-voltage systems also bring higher electrical safety risks. Photovoltaic modules, DC cables, combiner boxes, and grounding grids operate outdoors all year round, exposed to sunlight, rain, salt spray corrosion, and aging due to temperature differences between day and night. They are prone to hidden dangers such as cable insulation damage, water leakage from junction boxes, corrosion and virtual connection of grounding terminals, and failure of equipotential conduction. These faults have strong concealment and are difficult to detect in the early stages. They can cause frequent tripping of inverters, decrease in power generation, and in severe cases, lead to major safety accidents such as electric shock, DC arc fire, and lightning damage to equipment. According to the relevant regulations of photovoltaic power stations, multiple safety tests such as insulation resistance, grounding resistance, and continuity of conduction need to be completed for grid connection acceptance, annual preventive testing, and fault repair. The traditional solution requires carrying multiple devices such as insulation shake meters, grounding resistance testers, and continuity testers, repeatedly replacing wiring, and the process is cumbersome, with scattered data from multiple devices, resulting in low on-site testing efficiency. Shanghai LAILX has developed the LXH601 insulation grounding comprehensive tester to address the pain points of photovoltaic high-voltage systems, achieving integrated multi class safety testing functions. One device completes the electrical safety testing of the entire photovoltaic chain. Multi functional comprehensive electrical appliance

The biggest innovation of LXH601 Insulation and Grounding Comprehensive Tester is to break the single function limitation of traditional instruments. It integrates multiple detection capabilities such as insulation resistance testing, grounding resistance testing, grounding continuity testing, AC/DC voltage measurement, insulation fault location, polarization index PI, dielectric absorption ratio DAR calculation, etc., fully covering the core safety testing projects of photovoltaic power plants. It is suitable for mainstream photovoltaic DC systems of 1000V and 1500V, and the insulation testing voltage can be adjusted in multiple levels. It can accurately measure a wide range from 0.01 Ω to 2000M Ω with a measurement accuracy of ± 2%. The equipment is equipped with digital filtering anti-interference algorithm, effectively suppressing complex electromagnetic interference in outdoor sites. Even in damp and multi interference power plant sites, it still ensures stable and reliable measurement data without data drift problems.

The device is equipped with GFL insulation fault location technology, which can further locate the approximate section of the fault after detecting abnormal insulation between the string and the ground. This helps operation and maintenance personnel quickly identify the fault points such as cable damage and moisture in the junction box, without the need for extensive section by section troubleshooting, shortening the downtime at the fault location, and reducing the loss of power generation in the power station. The automatic calculation function of polarization index and absorption ratio can deeply evaluate the degree of aging and moisture absorption of insulation materials. It not only provides a single insulation resistance value, but also predicts the long-term deterioration trend of the insulation system, realizes early warning of hidden dangers, and shifts from post repair to pre prevention in fault disposal. It has high practical value for the operation and maintenance of existing old power stations.
At the practical design level of the product, LXH601 fully considers the needs of outdoor field operations. The whole machine adopts an industrial portable body design, which is compact in size and easy to carry and transport on site. It has a high-definition large screen display, intuitive and clear parameter readings, and an operation menu that fits the logic of photovoltaic detection business. The operation and maintenance personnel have a simple hands-on experience. The device supports local storage of massive detection data, and the test records include test conditions, test values, and device numbers. After the detection is completed, standardized PDF reports can be exported directly, and the data is complete and traceable, meeting the requirements of power station completion acceptance and third-party testing agency data archiving. The equipment has complete hardware protection, automatic protection against overvoltage and overcurrent during the testing process, ensuring the personal and equipment safety of the testing personnel.

The LXH601 insulation grounding comprehensive tester is widely applicable in various scenarios, including the completion and acceptance of new photovoltaic power stations, annual safety inspections of existing power stations, safety sampling of component production plants, troubleshooting of fault groups, and DC side safety verification of inverters. It covers various photovoltaic projects such as household distributed, industrial and commercial, mountainous, and fishery photovoltaic complementary projects. With the continuous improvement of voltage levels in photovoltaic systems, the importance of electrical safety has become increasingly prominent, and electrical safety testing has become an indispensable part of power plant operation and maintenance. The LAILX LXH601 comprehensive insulation and grounding tester solves the pain points of traditional multi instrument detection with an integrated solution, balancing measurement accuracy, fault tracing ability, and portability. It provides electrical safety protection for the entire life cycle of photovoltaic power plants and helps promote the safe and high-quality development of the photovoltaic industry.

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