After the popularization of 1500V high-voltage photovoltaic systems, the electrical safety testing standards for components, strings, inverters, and combiner boxes have continued to tighten. According to IEC61730 and domestic photovoltaic engineering acceptance standards, multiple safety tests must be completed for insulation resistance, grounding continuity, withstand voltage, and polarity determination during the completion and annual operation and maintenance of power stations. The traditional detection mode requires the separate purchase of multiple equipment such as insulation shake meters, grounding resistance testers, and voltage withstand testers. When going out for inspections, carrying multiple sets of instruments and numerous testing cables, frequent replacement of equipment wiring, low operational efficiency, and scattered data from multiple devices make it difficult to archive and manage them uniformly. Suzhou LAILX has launched the LXH601 Insulation and Grounding Comprehensive Tester, which integrates ten detection functions including insulation, grounding, withstand voltage, and fault location. A single device can complete electrical safety testing for all types of photovoltaics. With a lightweight and portable design combined with multiple high-voltage safety protections, it completely solves the tedious and inefficient pain points of traditional safety testing equipment and has become a standardized safety testing core equipment for photovoltaic EPC, third-party testing, and operation and maintenance enterprises. Multi functional comprehensive electrical appliance

The core performance of LXH601 is deeply adapted to 1500V high-voltage photovoltaic systems, and the insulation resistance test supports three levels of high-voltage output: 500V, 1000V, and 1500V. It perfectly matches the requirements of low-voltage components, traditional 1000V string, and high-voltage 1500V array grading detection. The insulation measurement range covers 0.01M Ω to 100G Ω, and the measurement accuracy can reach ± 1%. It can accurately capture subtle insulation defects such as cable skin breakage, junction box water ingress and moisture, aging of component insulation layer, and internal leakage of combiner box. The device has a unique photovoltaic dedicated bipolar DUAL synchronous detection mode, which can simultaneously collect positive and negative pole to ground insulation values. A single test can fully evaluate the insulation health status of the entire string without the need for separate measurements, simplifying the detection process by half; Equipped with GFL insulation fault location technology, it can quickly locate the internal insulation damage points of the string, greatly reducing the time for fault investigation. The grounding detection adopts a four wire precision measurement algorithm to eliminate the interference of the test lead's own resistance. The grounding resistance measurement range is 0m Ω to 2000m Ω, with a minimum resolution of 0.1m Ω. It accurately detects the grounding status of the bracket, lightning protection strip, and equipment shell, and quickly identifies safety hazards such as grounding virtual welding, rust and open circuit, and grounding resistance exceeding the standard.

The equipment integrates more than ten photovoltaic exclusive testing functions. In addition to basic insulation, grounding, and AC/DC withstand voltage, it also supports polarization index PI, dielectric absorption ratio DAR, protective conductor continuity RPE, open circuit voltage, short-circuit current, polarity determination, residual charge automatic discharge, and other functions. The complete set of safety testing that could only be completed by four or five instruments can now be achieved with only one LXH601 device. The cost of equipment procurement, storage, and maintenance has been greatly reduced, and the overall work efficiency of a single power station inspection has been improved by more than 40%. Built in timer test mode, customizable insulation withstand voltage test duration, automatically shuts down and locks data when the set time is reached, suitable for batch component standardized withstand voltage testing, ensuring consistency of test results; After the high-voltage test is completed, the residual charge in the circuit will be automatically released to eliminate the risk of electric shock caused by operators touching the circuit, and to comprehensively avoid safety hazards in high-voltage operations.

The adaptability of outdoor mobile detection has been comprehensively optimized. The LXH601 adopts an industrial integrated compact protective chassis, with a body equipped with anti slip handles and adjustable shoulder straps, making it easy for a single person to carry and transport. The internal modular partition of the chassis stores a complete set of test cables, grounding probes, and high-voltage insulation fixtures, without the need for additional accessories. The whole machine has an IP65 dustproof and waterproof protection level, with a working temperature range of -10 ℃ to 60 ℃. It can be tested normally in rainy days, high humidity mountainous areas, and coastal salt spray environments, and is not afraid of complex outdoor climates in all seasons. The body is equipped with a high-definition LCD digital display screen, with large font readings that are clearly visible under strong light. The physical function buttons are stable to operate, and can be accurately controlled even when wearing gloves outdoors; Equipped with a large capacity rechargeable lithium battery, it supports uninterrupted batch testing throughout the day when fully charged. The USB data interface can store thousands of sets of testing data locally, and a complete safety inspection report can be exported with one click, including insulation resistance, grounding resistance, withstand voltage curve, and fault judgment conclusion, meeting the requirements of engineering acceptance data archiving.

Multiple high-voltage safety protection mechanisms ensure the safety of on-site workers. The whole machine is equipped with high-voltage isolation circuit modules, which integrate automatic power-off protection for overvoltage, overcurrent, and arc leakage. Once there is a risk of short circuit or leakage in the detection circuit, the equipment will cut off the high-voltage output in milliseconds and synchronously sound and light alarms to indicate danger. The whole machine has passed the authoritative certification of power safety regulations. All high-voltage test leads are made of double-layer insulated protective materials and equipped with insulated operating handles, fully complying with the safety regulations for photovoltaic high-voltage direct current operations. Testing personnel do not need to wear multiple protective equipment to operate stably.

The LAILX R&D team in Suzhou optimizes equipment algorithms for differentiated scenarios in the photovoltaic industry, which can be adapted for use in small spaces of distributed rooftop photovoltaics, large ground high-voltage power stations, energy storage converter rooms, and industrial and commercial distribution rooms. Third party testing institutions can rely on accurate and stable data from equipment to issue compliance and safety testing reports; Operation and maintenance enterprises use it for annual safety inspections to predict in advance the risks of electric shock and fire caused by insulation failure and grounding failure; EPC engineering enterprises are used for full acceptance of power plants before grid connection, completing all electrical safety project inspections in one go and shortening project delivery cycles.

At present, safety accidents in photovoltaic high-voltage systems are frequent, and electrical safety testing has become a necessity for power plant operation. The LXH601 insulation grounding comprehensive tester has four core advantages: multifunctional integration, high precision, high safety, and portable intelligence. It has reconstructed the photovoltaic voltage and current testing operation mode, built the first line of defense for electrical safety in photovoltaic power plants with one device, and relied on domestically developed core technologies to support the safe, standardized, and high-quality development of the new energy industry.

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