FLN36-7.2 SF6 Load Break Switch

Compared with 3.3KV, 6KV, and 6.6KV products, the arc extinguishing capability of this product has been significantly improved: firstly, the arc extinguishing structure has been optimized, and an efficient arc extinguishing chamber design has been adopted to extend the residence time of SF6 gas in the arc extinguishing chamber and improve the arc extinguishing efficiency; The second is to increase the rated pressure of SF6 gas (0.05MPa), enhancing gas insulation and arc extinguishing performance; The third is that the rated short-circuit closing current and short-circuit transfer current are larger, which can disconnect larger capacity load currents and short-circuit fault currents, adapt to the high-power distribution needs of 7.2KV medium and high voltage scenarios, effectively cope with scenarios with large load fluctuations and high short-circuit risks, and avoid equipment damage and distribution accidents caused by arc extinction failure.

Intelligent monitoring functions mainly include: real-time monitoring and abnormal alarm of SF6 gas pressure, remote feedback of equipment opening and closing positions, monitoring of operating mechanism operation status, real-time monitoring of line current/voltage, etc; The implementation method is to install gas density relays, current transformers, voltage transformers, and position sensors on the product. The sensors will collect the equipment operation data and transmit it to the monitoring terminal (such as the background monitoring system, mobile APP) through the communication module. The staff can remotely view the equipment operation status in real time. When there is abnormal gas pressure, operating mechanism failure, current/voltage overload, etc., the monitoring terminal will automatically alarm, making it easy for the staff to investigate and handle in a timely manner, achieving unmanned and intelligent operation and maintenance.

When installing in a prefabricated substation, three points should be noted: first, ensure that the internal space of the prefabricated substation matches the product size, reserve sufficient operation and maintenance space, and facilitate later equipment maintenance and accessory replacement; The second is to ensure the sealing and ventilation of the equipment. The internal space of the prefabricated substation is narrow, and it is necessary to ensure good sealing performance of the product. At the same time, the internal ventilation of the substation should be strengthened to avoid the accumulation of SF6 gas leakage, which may cause safety hazards; The third is to ensure the reliable linkage of the operating mechanism. In prefabricated substations with dense equipment, it is necessary to check the linkage logic between the product and other equipment in the substation (such as transformers and fuses) to ensure accurate and reliable load switching and fault protection actions, and to avoid equipment misoperation.

When used in low-temperature environments (≤ -15 ℃), the manufacturer will equip low-temperature adaptation components (such as low-temperature grease and antifreeze springs) in the operating mechanism to avoid mechanism jamming caused by low temperatures; At the same time, SF6 gas is selected as a low-temperature compatible type, which can maintain stable insulation and arc extinguishing performance in an environment of -25 ℃, and will not liquefy due to low temperature; When installing, the equipment should be installed indoors or in an outdoor cabinet with cold protection to avoid direct exposure to extreme low temperature environments; During daily operation and maintenance, regularly check the lubrication status of the operating mechanism and promptly replenish low-temperature lubricating grease to ensure flexible and reliable equipment operation.

The core difference between the two applicable scenarios is voltage level and load capacity: FLN36-7.2KV is suitable for 7.2KV medium and high voltage scenarios, and can carry larger load capacity, stronger arc extinguishing and insulation capabilities. It is mainly used for upgrading and renovating medium and high voltage distribution networks, high-power distribution (such as large factories and new energy projects), and scenarios with higher voltage level requirements; FLN36-6.6KV is suitable for 6.6KV special medium voltage scenarios, mainly used in special industries such as mining, chemical industry, and imported equipment matching that require high voltage accuracy and linkage protection, with relatively small load capacity. The two are applicable to different scenarios and need to be selected based on the actual voltage level and load demand.