High voltage photovoltaic string insulation damage and grounding system failure are the core electrical safety hazards that cause leakage, electric shock, component burnout, and power plant fires. The traditional detection mode requires carrying multiple devices including insulation resistance meters, grounding resistance testers, and conductivity testers, frequently replacing instruments and rewiring them. The outdoor inspection process is cumbersome, the work efficiency is low, and most devices cannot adapt to the current 1500V high-voltage photovoltaic system detection standards. Suzhou LAILX has developed LXH601 comprehensive insulation and grounding tester to address the pain points of electrical safety testing in photovoltaic power plants. It integrates multiple levels of insulation measurement, grounding resistance detection, conductor conductivity testing, DC voltage detection, polarization index PI, and absorption ratio DAR calculation functions. A single device completes a complete set of safety testing for photovoltaic systems, adapting to ground power plants, distributed roofs, and energy storage rooms in all scenarios. With high precision, strong protection, and intelligent design, it has become the core equipment for photovoltaic electrical acceptance and annual safety inspection. DC withstand voltage, insulation impedance, grounding resistance, leakage current

The LXH601 insulation detection module fully complies with the IEC61730 and GB/T14715 photovoltaic electrical national standards, supporting four levels of high voltage test output: 250V, 500V, 1000V, and 1500V. It perfectly matches the mainstream 1500V high voltage photovoltaic string system in the market, with an insulation resistance measurement range covering 0.01M Ω to 10G Ω, and a stable measurement accuracy controlled within ± 1%. It has a unique bipolar synchronous insulation measurement mode, which synchronously collects the insulation values of the positive pole to ground and negative pole to ground groups of the photovoltaic string in a single connection. There is no need to exchange the test clip for repeated measurement, and the insulation health status of the entire string can be determined in one go, greatly simplifying the detection and wiring process. The equipment is equipped with insulation fault location GFL function, which can accurately lock the specific location of insulation damaged components in the array, solving the industry pain point of traditional insulation instruments that can only determine overall leakage and cannot locate the fault point. Operation and maintenance personnel do not need to disassemble and troubleshoot each component, and the efficiency of fault location is improved by more than 70%.

The grounding resistance detection module supports dual measurement modes of three pole method and two pole method, with a measurement range of 0.01 Ω to 30k Ω. It accurately detects the conductivity performance of photovoltaic bracket grounding, inverter protection grounding, lightning protection grounding, and energy storage equipment grounding system. It can quickly identify safety defects such as grounding electrode corrosion, grounding cable breakage, and grounding resistance exceeding the standard. At the same time, it is equipped with a 200mA protection conductor continuity testing function to detect the complete conductivity status of grounding cables, meeting the mandatory testing requirements for lightning protection grounding acceptance of photovoltaic power plants. The equipment integrates polarization index PI and insulation absorption ratio DAR automatic calculation functions, sets 1-minute and 10 minute timed insulation tests, automatically calculates two key indicators for insulation aging judgment, accurately evaluates the degree of insulation layer aging of cables and components, and provides scientific data basis for equipment replacement and line renovation by early warning of long-term service power station insulation degradation risks.

The whole machine adopts an industrial grade integrated three proof portable chassis, with modular partition storage for insulation test clips, grounding probes, and a complete set of high-voltage test cables, without the need for additional packaging and storage. The chassis is equipped with thick handles and adjustable shoulder straps, which can be carried by a single person or carried, and is suitable for various working conditions such as narrow roof spaces, mountain power stations without access, and indoor testing of energy storage and distribution rooms. The overall protection level of the equipment is IP65, with a high-strength sealed shell that is dust-proof and waterproof. Outdoor testing in light rain weather does not require protection, and the working environment can adapt to a range of -10 ℃ to 60 ℃. It can operate stably in high humidity environments during the southern rainy season and low temperature environments in the northwest winter. The internal circuit is equipped with multiple high-voltage isolation protection modules, which provide automatic power-off protection for overvoltage, overcurrent, arc, and reverse connection. After the high-voltage insulation test is completed, the equipment automatically releases residual charges in the circuit, completely eliminating the risk of electric shock for operators and fully complying with the safety regulations for photovoltaic high-altitude high-voltage operations.

The body is equipped with a high-definition color touch display screen, a fully graphical Chinese operation interface, clear functional zoning, and can quickly switch between insulation, grounding, conduction, and timed testing modes without reading the manual. The values are displayed in real-time on the large screen, and the test voltage, test duration, resistance value, and qualification judgment mark are synchronously marked. The test results are intuitive and easy to understand. Built in large capacity local storage can store thousands of complete insulation and grounding testing data. Each set of data automatically records the testing time, testing gear, and array number. It is equipped with a USB data export interface and can be connected to a computer to export the testing report with one click. The report includes complete original measurement values, insulation judgment conclusions, and comparison of grounding qualification standards. It can be directly used for power station completion acceptance and safety annual inspection report material submission. The equipment is equipped with a digital adaptive filtering algorithm, which effectively suppresses data fluctuations caused by strong electromagnetic interference outdoors and damp ground. The measurement values are stable without jumping in complex station environments, eliminating repeated rework caused by misjudgment.

With the continuous tightening of domestic photovoltaic safety regulatory policies, complete insulation and grounding testing records are mandatory for the acceptance of new power stations and annual safety inspections of existing power stations. The traditional multi device combination testing mode is no longer suitable for the efficient operation and maintenance needs of the industry. The Suzhou LAILX LXH601 Insulation and Grounding Comprehensive Tester breaks the limitation of one machine, one use equipment. One set of instruments covers the entire process of electrical safety testing for photovoltaics, greatly reducing the procurement cost of operation and maintenance equipment, reducing the burden of field operations, and improving the comprehensive efficiency of single inspection by more than 40%. Since its launch, the product has been widely used in major new energy operation and maintenance companies, third-party power testing institutions, and quality inspection departments of photovoltaic module production enterprises. With a complete service system of direct supply from local factories in Suzhou, 24-hour technical support, and one-year machine warranty, the market recognition continues to increase. Suzhou LAILX will continue to upgrade its equipment's high-voltage measurement range and fault location algorithm, expand its energy storage dedicated safety detection function, and use integrated domestic electrical detection equipment to comprehensively safeguard the long-term electrical operation safety of photovoltaic power plants, and help promote the standardized and standardized operation and maintenance development of the new energy industry.

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