Photovoltaic systems are exposed to natural environmental erosion such as sunlight, rain, humidity, dust, and lightning strikes all year round. Damage to cable sheaths, water ingress into junction boxes, and corrosion of grounding lines can easily lead to insulation degradation, grounding failure, leakage short circuits, and other safety accidents. In mild cases, the inverter's power generation may be damaged due to shutdown, and in severe cases, fire and electric shock safety accidents may occur. Therefore, regular testing of insulation resistance and grounding performance is a mandatory requirement for the safe operation and maintenance of photovoltaic power plants. Suzhou LAILX independently developed LXH601 insulation and grounding comprehensive tester, breaking the industry drawbacks of traditional detection instruments with single functions and requiring multiple devices to rotate operations. It integrates multiple functions such as insulation testing, grounding resistance testing, line conduction testing, polarity verification, fault location, etc. One device completes the entire photovoltaic electrical safety testing, greatly reducing inspection manpower and equipment investment costs. Leakage current test

LXH601 supports bipolar DUAL detection mode in the insulation detection module, which can synchronously measure the insulation resistance of photovoltaic positive and negative poles to ground. The insulation measurement range covers 0.02M Ω to 2000M Ω, and the test voltage is adjustable in multiple levels, suitable for insulation screening of photovoltaic string at different voltage levels; The measurement of grounding resistance is compatible with multiple testing modes such as the three pole method and the two pole method, with a range of 0.01 Ω to 30k Ω, accurately capturing the hidden dangers of grounding resistance exceeding the standard caused by corrosion of grounding electrodes and virtual grounding of grounding cables; The continuity test of the circuit quickly verifies the on/off status of the protective grounding wire and equipotential connection wire, and the polarity detection avoids the electrical damage to the inverter and components caused by the reverse connection of the positive and negative poles of the construction wiring. The five core functions fully cover the electrical safety acceptance requirements of the DC and AC sides of the photovoltaic power station.

The device is equipped with digital filtering and adaptive anti-interference algorithms internally, optimizing data processing logic for complex working conditions such as electromagnetic interference in outdoor power stations, rainy and humid weather, effectively shielding external clutter interference, and ensuring stable and accurate test data in harsh environments. At the level of safety protection, an automatic discharge function has been added to the entire machine, which automatically releases the residual high-voltage charge of the circuit after each insulation test, avoiding the risk of electric shock for operators from the operational level and complying with electrical safety operation standards. The body adopts a sturdy engineering plastic shell, with a dust and fall protection level that meets the standard. It is equipped with a portable handbag, making it convenient for operation and maintenance personnel to carry it to various locations for inspection. There is no need to carry multiple bulky instruments such as megohmmeters and grounding shake meters, and the efficiency of a single inspection operation is increased by more than 40%.

At the project implementation level, LXH601 is suitable for both the electrical safety completion acceptance of newly built photovoltaic power plants before grid connection and the annual safety inspection and troubleshooting of power plants in operation. A large number of industrial and commercial photovoltaic projects, as well as household photovoltaic projects, have used this instrument to identify hidden dangers such as cable skin damage, water seepage, moisture damage to junction boxes, and insulation degradation, and to rectify them in advance to avoid the risk of electric leakage and fire. Many third-party power testing institutions have listed LXH601 as a standard acceptance instrument, relying on the advantages of integrated and efficient testing to shorten the project acceptance cycle and improve the efficiency of testing business contracting.

With the increasingly strict domestic photovoltaic safety control regulations, power grid companies in various regions continue to upgrade the electrical safety testing standards for grid connected photovoltaic projects, and multifunctional comprehensive safety testers have ushered in a broad market. LAILX has been deeply involved in photovoltaic electrical testing technology for many years. LXH601 has been domestically developed from the bottom layer of software and hardware, and has obvious price and after-sales advantages compared to imported multifunctional testers. The manufacturer provides on-site technical training and annual equipment calibration services. In the future, Lexus will continue to iterate fault localization algorithms, optimize the precise traceability ability of single point insulation faults in string systems, and use high-performance integrated detection equipment to strengthen the electrical safety bottom line of photovoltaic power plants, helping the photovoltaic industry to develop safely, compliantly, and steadily.

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