The entire photovoltaic power plant system includes a large number of DC cables, junction boxes, combiner boxes, inverters, grounding grids and other electrical equipment. Long term exposure to complex outdoor environments can cause aging and cracking of cable insulation layers, corrosion and rusting of grounding electrodes, and failure of equipotential connections, leading to major safety accidents such as leakage electric shock, system short circuits, and lightning damage to equipment. Insulation resistance and grounding conductivity are the two core testing indicators for photovoltaic electrical safety. The traditional testing mode requires multiple devices, including insulation tester, grounding resistance tester, and voltage tester, to be equipped separately. The instruments are frequently replaced and wired repeatedly on site, making the testing process cumbersome and inconvenient to carry and transport. Moreover, the superposition of electromagnetic interference from multiple devices can easily cause data deviation. Suzhou Laikesi LAILX has independently developed the LXH601 insulation grounding comprehensive tester to meet the integrated electrical testing needs of the photovoltaic and power industries. It integrates eight core testing functions and enables a single device to complete comprehensive electrical safety testing of photovoltaic systems in one stop. With high-precision, strong anti-interference, portable and intelligent design, it innovates the outdoor electrical safety testing operation mode. Leakage current test

LXH601 breaks the limitation of traditional testing equipment being single machine and single use. It integrates eight functions: insulation resistance testing, grounding resistance testing, equipotential continuity conductivity testing, AC/DC voltage measurement, photovoltaic open circuit Voc, short-circuit Isc auxiliary detection, insulation fault location, and circuit impedance testing. One device can cover all electrical testing projects such as photovoltaic power plant construction acceptance, annual safety inspection, fault diagnosis, and cable maintenance. In the past, the operation and maintenance team needed to carry three to four independent instruments for outdoor testing. Now, only one LXH601 is needed to complete all tasks, greatly reducing the weight of equipment carrying, reducing wiring and debugging time. The electrical testing efficiency of a single area has been improved by more than 70%, while avoiding data distortion caused by the superposition of multiple instruments due to electromagnetic interference. The stability of the testing results has been significantly improved. The whole machine adopts a compact industrial portable chassis design, weighing only 2.1kg, and is equipped with a wear-resistant and waterproof portable bag. It can be transported by hand or backpack, and is suitable for remote off grid photovoltaic projects without relying on on-site operations in mountainous areas, rooftops, and remote areas; Protection level IP53, dust-proof and splash proof, suitable for short-term operation in outdoor rain, snow, sand and dust weather, with a wide temperature range covering -10 ℃ to 50 ℃, suitable for photovoltaic projects in various climate regions across the country.

In terms of core detection accuracy and range, LXH601 fully matches the detection standards for photovoltaic high-voltage direct current systems. The insulation resistance test supports three levels of high voltage output: 500V/1000V/2500V, with a measurement range of 0.01M Ω to 1000G Ω. It accurately detects the aging and damage of DC cables and components to ground insulation, meeting the high voltage insulation detection standards for photovoltaic DC systems; The grounding resistance test is compatible with multiple modes such as three pole method, two pole method, and clamp type auxiliary test, with a range of 0.01 Ω to 30k Ω. Even if the grounding network is corroded by high resistivity soil and saline alkali land in mountainous areas, the grounding resistance value can be accurately measured to determine whether the grounding system meets lightning protection safety standards; The equipotential conduction test can measure a minimum loop impedance of 0.001 Ω, quickly identifying loose or disconnected grounding connections on equipment casings and supports, and avoiding the risk of static electricity accumulation and electric leakage causing injury. The equipment is equipped with LAILX's self-developed adaptive digital filtering algorithm, which automatically filters out clutter in high-power electromagnetic interference environments such as outdoor inverters and combiner boxes. The data has no jumps or drifts, and the measurement error is reduced by 80% compared to traditional simple testers. The detection data can be directly used as a basis for power plant safety acceptance compliance.

The LXH601 is equipped with a 5-inch color LCD screen, a fully Chinese operation menu, clear functional zoning, and supports one click calling of photovoltaic dedicated detection programs. It has built-in preset parameters for power station acceptance standards, and does not require manual adjustment of voltage and range by workers. The corresponding testing mode is directly selected when starting up, and zero foundation operation and maintenance personnel can quickly get started. The equipment is equipped with automatic range switching technology, which eliminates the need for manual gear switching during the detection process. The instrument automatically matches the optimal measurement range based on the measured object, simplifying the operation steps; Built in large capacity local storage can store 5000 complete sets of testing data, including insulation resistance, grounding resistance, testing time, and equipment number. It supports USB data export and comes with analysis software to automatically generate electrical safety testing reports. The data can be archived and traced for a long time. Multiple hardware protection mechanisms are established at the security level. The high-voltage insulation test port is designed with anti electric shock shielding, and the leakage current is monitored in real-time during the testing process. If it exceeds the standard, the high-voltage output will be automatically cut off and an audible and visual alarm will be triggered; The wiring terminal is protected against reverse connection and short circuit, and misoperation will not damage the instrument and photovoltaic modules, avoiding high-voltage detection safety accidents from the source.

The insulation fault location function is the distinctive advantage of LXH601 compared to ordinary comprehensive testers. For insulation damage and leakage faults of photovoltaic cables, the instrument can quickly lock the faulty cable section through segmented measurement, without the need for full line disassembly and troubleshooting, greatly shortening the cable fault maintenance period and reducing labor and material loss costs. At the same time, the equipment can assist in measuring the open circuit voltage and short-circuit current of photovoltaic modules. Combined with IV and EL equipment, it forms a complete module performance+electrical safety multi-dimensional detection combination. One set of LAILX detection equipment can cover the complete acceptance, operation and maintenance testing needs of photovoltaic power plants from module performance to electrical safety, reducing the procurement cost of multiple devices for enterprises.

At present, LXH601 has been widely applied in centralized photovoltaic power stations, industrial and commercial distributed photovoltaics, household photovoltaic supporting grid acceptance, energy storage power station electrical testing, and power distribution network inspection scenarios, and has gained recognition from a large number of industry customers. Feedback from the acceptance unit of new energy projects: the integrated equipment greatly simplifies the on-site acceptance process, and a single instrument completes all electrical safety inspections, greatly improving the efficiency of issuing reports; The operation and maintenance enterprise stated that the equipment has strong anti-interference ability, stable data in complex electromagnetic environments in mountainous areas, and the grounding and insulation fault location functions effectively shorten the time for fault repair; The third-party electrical safety testing institution recognizes that the measurement accuracy of the instrument meets the national photovoltaic electrical testing standards, and the testing data has compliance effectiveness.

Suzhou LAILX has always focused on the integration and localization innovation of new energy detection instruments. The LXH601 insulation grounding comprehensive tester fills the market gap in the one-stop detection equipment for photovoltaic electrical safety. The brand will continue to optimize fault location algorithms, expand wireless data transmission and cloud report synchronization functions, and create a complete set of testing instrument matrices for photovoltaic performance, thermal imaging, and electrical safety. With highly stable and cost-effective domestic testing equipment, we will comprehensively safeguard the safe and stable operation of the domestic photovoltaic industry.

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