Photovoltaic power plants belong to high-voltage direct current electrical systems. The equipment operates outdoors all year round and is continuously exposed to sunlight, rain, wind, sand, salt spray erosion. Faults such as aging and cracking of cable insulation layers, water ingress and moisture in junction boxes, rusting and virtual connection of brackets, and loosening of junction box terminals often occur, which can easily cause leakage, short circuits, arc fires, equipment burns, and even personnel electric shock accidents. Electrical safety testing is an essential key link in power plant grid connection acceptance, annual preventive testing, and fault investigation. In the past, when conducting safety inspections related to insulation and grounding, the operation and maintenance team needed to carry multiple devices including insulation resistance meters, grounding resistance testers, conductivity testers, and voltage measuring instruments. The wiring was repeatedly replaced on site, and the instruments were transported back and forth, resulting in a cumbersome and time-consuming workflow; Under outdoor electromagnetic interference environment, ordinary instrument measurement data is prone to drift, and data from multiple devices also needs to be manually compared, which not only reduces inspection efficiency but also easily leads to human operation errors, making it difficult to adapt to the detection specifications of 1500V high-voltage photovoltaic systems. Suzhou LAILX has launched the LXH601 Insulation and Grounding Comprehensive Tester, which integrates more than ten safety inspection functions into a single machine, completing a complete set of safety tests for photovoltaic system insulation, grounding, conduction, voltage, etc. in one stop, and filling the gaps in photovoltaic high-voltage system safety inspection equipment. Multi functional comprehensive electrical appliance

LXH601 breaks through the traditional design concept of one machine, one use, and integrates insulation resistance testing, four wire grounding resistance testing, protective conductor conductivity testing, AC/DC voltage measurement, open circuit voltage Voc, short-circuit current Isc testing, line polarity determination, insulation fault location, polarization index, and absorption ratio detection. One instrument can complete a complete set of electrical safety verification for components, strings, combiner boxes, inverters, and grounding grids, replacing multiple devices in the past and eliminating the steps of frequent instrument replacement and repeated disassembly and assembly of wiring. Under the same inspection tasks, the efficiency of operations is increased by more than 40%, reducing the workload of on-site operation and maintenance. The insulation test supports a maximum test voltage of 2500V, with a range covering 0.1M Ω -10G Ω, suitable for the current mainstream 1500V high-voltage photovoltaic string, accurately identifying hidden dangers such as cable insulation damage, component moisture leakage, etc; The unique DUAL bipolar synchronous detection mode of the equipment allows for simultaneous insulation measurement of positive and negative poles to ground with a single connection, without the need to switch connections for repeated testing, which is in line with the detection characteristics of photovoltaic DC systems; Equipped with GFL insulation fault location technology, it can quickly lock the string position corresponding to insulation abnormalities, without the need for block by block power-off troubleshooting, shorten the downtime for fault maintenance, and reduce the loss of power generation. Grounding detection supports both grounding resistance measurement and continuity conductivity testing, verifying the reliability of grounding for brackets, frames, and inverter enclosures, and identifying lightning protection safety hazards such as corrosion of grounding electrodes and false grounding of flat iron; The polarity testing function can quickly troubleshoot the problem of reverse polarity connection during the construction phase, avoiding wiring errors and damaging the core components of the inverter.

The instrument hardware is fully optimized for outdoor anti-interference ability, and hardware filtering is combined with software algorithms to suppress data fluctuations caused by the complex electromagnetic environment of the photovoltaic site, ensuring stable and accurate measurement results. It has two working modes: DUAL rapid measurement and TIMER timed measurement. The timed mode can set a testing duration of 1-999 seconds to evaluate the aging trend of insulation materials and meet the requirements of deep testing. The whole machine adopts an industrial grade portable protective case, with a sturdy and impact resistant body, dust and water resistance, and a working temperature of -20 ℃ to 50 ℃. It can work stably in high temperature, cold, and humid outdoor environments, and can be transported by a single person with a portable case. It is convenient to carry and deploy in mountainous power stations, rooftop distributed systems, and remote outdoor sites. High definition display screen, Chinese operation interface, clear button layout, automatic range switching. After simple training, operation and maintenance personnel can operate proficiently. Test data is automatically stored, and report export is supported for easy acceptance data archiving and later comparative analysis.

Photovoltaic safety accidents often originate from minor electrical hazards. Regular and standardized safety inspections can detect risk points in advance and avoid significant losses. The LXH601 Insulation Grounding Comprehensive Tester caters to scenarios such as completion acceptance of new construction projects, annual safety inspections of power plants, fault repair and troubleshooting, and component incoming safety sampling. It provides highly integrated safety testing tools for power plant operation and maintenance enterprises, third-party testing agencies, EPC engineering companies, and power plant owners. LXH601, with its innovative design of one machine with multiple functions, solves the pain points of traditional detection mode with multiple devices, complex processes, and low efficiency. It helps to standardize electrical testing in the photovoltaic industry, safeguard the safety of photovoltaic power station equipment and personnel, and provide solid technical guarantees for the healthy and orderly development of the photovoltaic industry.

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