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FLN36-6
FLN36-6 SF6 Load Break Switch
FLN36-6KV SF6 load switch is an indoor AC high voltage switchgear developed for mainstream scenarios in medium voltage distribution networks. It uses SF6 gas as the insulation and arc extinguishing medium, and is strictly manufactured in accordance with relevant national and international standards. The rated voltage is 6KV, the rated frequency is 50Hz, the rated current is 630A, and the mechanical life is ≥ 1000 cycles. The product adopts a modular structure design, and the upper and lower shells are injection molded with epoxy resin to form a sealed and inflatable cavity. It is equipped with a K-type single spring operating mechanism, which can achieve reliable operation in the “closing opening grounding” three positions. The incoming and outgoing lines are connected by high-voltage cables, and are suitable for various installation forms such as cable branch boxes and ring main units. It is mainly used for branch control, load switching, and equipment protection of medium voltage distribution networks. It can disconnect normal load current, cable charging current, and no-load transformer current. It is one of the core switching devices for industrial and civilian medium voltage distribution networks.
Features
1. Modular design, easy installation and maintenance:
adopting a standardized modular structure, each component can be independently disassembled and replaced, without complex debugging during installation, and can be quickly embedded into various ring main units and cable branch boxes to adapt to different distribution layout requirements; During later maintenance, the faulty components can be repaired separately without dismantling the entire equipment, greatly improving installation and maintenance efficiency and reducing operation and maintenance costs.
2. Excellent arc extinguishing insulation performance, safe and reliable operation:
SF6 gas has excellent insulation and arc extinguishing performance, with no open flames or harmful gas emissions during the arc extinguishing process. It has high insulation strength and can effectively resist the risk of insulation breakdown at 6KV voltage level; The front of the mechanism box is equipped with an SF6 gas pressure gauge, which can monitor gas pressure changes in real time, ensure stable insulation and arc extinguishing performance of the equipment, and avoid operational failures caused by gas leaks.
3. Reliable operating mechanism and flexible operating mode:
equipped with a K-type single spring operating mechanism, which automatically stores energy for the opening spring after the closing action is completed. The operating feel is light, the action is reliable, and the mechanical life is long; Supports both manual and electric operation modes. The electric operation version can achieve remote control and is suitable for unmanned power distribution scenarios. Manual operation can be used as an emergency backup to ensure that the equipment can operate normally in extreme situations.
4. Complete interlocking protection and strong anti misoperation ability:
equipped with a complete mechanical interlocking device, reliable interlocking is achieved between the load switch and the grounding switch, and between the grounding switch and the cabinet door, strictly preventing dangerous operations such as “closing with load, closing with grounding, and wrong opening and closing”; Simultaneously equipped with a position indicator device, directly connected to the moving contact transmission shaft, it can clearly display the three working states of “closing, opening, and grounding” of the equipment, ensuring the personal safety of operators and the safe operation of the equipment.
5. Wide environmental adaptability, suitable for various scenarios:
The optimized sealing structure and material selection enable the product to adapt to environmental temperatures ranging from -15 ℃ to+40 ℃, with an altitude that can be extended to 2000m, and can withstand a certain degree of dust and humidity. It can adapt to various medium voltage distribution scenarios such as industrial plants, urban distribution networks, and high-rise buildings without special modifications, and has strong universality.
The product has a rated short-time withstand current of 25kA/2s, a rated peak withstand current of 62.5kA, a rated lightning impulse withstand voltage of 75kV between phases and ground, and 85kV between faults, and a rated short-time power frequency withstand voltage of 42kV between phases and ground, and 45kV between faults.
The rated pressure of SF6 gas (gauge pressure at 20 ℃) is 0.04-0.05MPa, and the leakage rate is ≤ 1 × 10 ⁻⁷ Pa · m ³/s; The applicable environmental humidity is a daily average relative humidity not exceeding 95% and a monthly average relative humidity not exceeding 90%, with no obvious corrosive gases, flammable vapors, or severe vibrations;
The implementation standards include GB3804-2004, GB16926-2009, IEC 60265-1, and IEC 62271-105. The product can be matched with fuses to form a combination electrical device according to demand, enhancing short-circuit protection capability. At the same time, accessories such as auxiliary contacts, trip coils, emergency trip mechanisms can be customized to meet different control and protection needs. If you need detailed technical parameter tables, installation drawings, operation and maintenance manuals, or customized solutions, you can contact the manufacturer for professional support.
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Specification
| Item | Unit | Data | |
| Rated voltage | kV | 6 | |
| Main circuit lightning impulse withstand voltage (Same,relative/between fracture surfaces) (peak value) | kV | 40 | 46 |
| Main circuit 1-minute power frequency withstand voltage (Same,relative/between fracture surfaces) (peak value) | kV | 20 | 23 |
| 1-minute power frequency withstand voltage of auxiliary circuit | kV | 2500 | 23 |
| Rated current | A | 630 | |
| Transfer current | A | ||
| Rated short-circuit closing current (peak) | kA | 50 | |
| Rated short-time withstand current | kA | 20 | |
| Rated short-circuit duration | S | 3 | |
| Rated peak withstand current (peak) | kA | 50 | |
| Grounding switch closing current (peak) | kA | 20 | |
| Peak withstand current of grounding switch (peak) | kA | 50 | |
| Mechanical lifespan of load switch | times | 3000 | |
| Mechanical lifespan of grounding switch | times | 2000 | |
| Rated pressure of arc extinguishing chamber (20 °C) | bar | 1.45 | |
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FAQs
Can FLN36-6KV SF6 load switch be used in combination with fuses? What are the advantages of combining?
Can be used in combination and can be paired with fuses to form FLRN36-6KV load switch fuse combination electrical appliances. The advantage of the combination is complementary protection: the load switch is responsible for opening and closing normal load current, no-load current, and cable charging current, achieving daily load switching and line control; Fuses are responsible for breaking short-circuit currents. When a short-circuit fault occurs in the circuit, the fuse can quickly melt, triggering the load switch to open, avoiding damage to distribution equipment caused by short-circuit currents, greatly improving the protection reliability of the distribution system, and adapting to scenarios with high requirements for short-circuit protection such as transformer protection.
Can the electric and manual operation of the product be used simultaneously? Will the two interfere with each other?
Can be equipped simultaneously without interfering with each other. The electric operation and manual operation are designed independently, and manual operation can be used as a backup method for electric operation. When there is a power failure or wiring failure during electric operation, the equipment can be opened and closed manually; Under normal circumstances, electric operation can achieve remote control and is suitable for unmanned scenarios. The switching between the two does not require complex operations, and the operation logic is interlocked to ensure safe and reliable operation.
The mechanical lifespan of this product can reach 1000 cycles. Do we need to replace the entire equipment after reaching the lifespan?
No need to replace the entire device. The mechanical life of 1000 cycles refers to the normal service life of the operating mechanism. After reaching the service life, professional technicians can be contacted to disassemble and repair the operating mechanism, replace worn parts (such as springs and contacts), and the equipment can continue to operate normally; If the insulation structure and SF6 gas sealing performance of the equipment body are normal, only maintenance and replacement of the relevant components of the operating mechanism are needed to extend the overall service life of the equipment and reduce the cost of equipment replacement.
What are the effects of low SF6 gas pressure during product operation? How to handle?
Low SF6 gas pressure can significantly reduce the insulation performance and arc extinguishing ability of equipment, and in severe cases, it can cause insulation breakdown, arc extinguishing failure, equipment failure, and even power distribution accidents. When the pressure gauge displays a pressure lower than the rated value (0.04MPa), the equipment operation should be stopped immediately, the power supply of the equipment should be cut off, professional personnel should be contacted for leakage detection, the leakage point should be found and repaired, high-purity SF6 gas should be replenished to the rated pressure, and only after passing the test can it be put back into operation. It is strictly prohibited to continue using the equipment when the gas pressure is too low.
What are the differences in installation space between this product and FLN36-3.3KV product?
Due to the need to adapt to 6KV medium voltage scenarios, FLN36-6KV products require strengthened insulation structures and arc extinguishing capabilities, resulting in a slightly larger volume than FLN36-3.3KV products and slightly larger installation space requirements. The internal space of cable branch boxes and ring main units adapted to FLN36-6KV products needs to be no less than the installation size of conventional medium voltage switch equipment, while FLN36-3.3KV products have a more compact volume and can be adapted to smaller distribution boxes; The installation methods of the two are the same, both support cable connection, and there is no significant difference in installation steps. Only the corresponding installation space needs to be matched according to the voltage level.
Related Applications
Medium voltage distribution network in industrial plants: As the core equipment of medium voltage distribution in small and medium-sized industrial plants (such as mechanical processing plants, chemical industrial park auxiliary plants, and building materials plants), it is installed in the ring main unit of the power distribution station in the plant area. It is responsible for distributing 10KV high-voltage electricity (6KV) after voltage reduction to the distribution terminals of various production workshops and warehouses, realizing load switching and protection of production equipment, ventilation equipment, and lighting systems. It can effectively respond to frequent load changes in the plant area, ensure stable production electricity consumption, and at the same time, perfect interlocking protection can avoid production safety accidents caused by operational errors.
Urban distribution network ring network power supply: adapted to urban distribution network ring network power supply system, installed in outdoor ring network cabinets or cable branch boxes near urban roads and residential areas, responsible for branch control and load distribution of urban medium voltage distribution network, can achieve rapid switching in case of line faults, avoid the expansion of fault range, and ensure the continuity of electricity consumption for urban residents’ daily life, commercial office and public facilities. It is one of the core equipment for urban distribution network upgrading and transformation, and is suitable for the use needs of high-density distribution scenarios in cities.
High rise building power distribution system: used for medium voltage power distribution in high-rise residential areas, office buildings, hotels and other high-rise buildings, installed in the distribution station of the underground garage of the building, responsible for converting high voltage electricity into 6KV medium voltage electricity, distributing it to the distribution shafts on each floor of the building, and providing stable power support for high-power equipment such as elevators, central air conditioning, water supply systems, lighting systems, etc; The compact structure of the product is suitable for the narrow installation space of high-rise building power distribution stations, and the remote control function can achieve unmanned operation, reducing the pressure of property operation and maintenance.
Auxiliary power distribution for large public facilities: Suitable for auxiliary power distribution systems of large shopping malls, sports halls, exhibition centers and other public facilities, responsible for medium voltage power distribution control of air conditioning rooms, backup generator rooms, and fire control systems in public facilities. The 6KV voltage level can meet the power demand of high-power auxiliary equipment in public facilities, and the high reliability of the product can ensure the electrical safety of public facilities during large-scale events and peak pedestrian flow periods, avoiding the impact of power distribution failures on the normal operation of public facilities.
