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FLN36-10
FLN36-10 SF6 Load Break Switch
FLN36-10KV SF6 load switch is an indoor AC high voltage switchgear developed specifically for the main scenarios of medium and high voltage distribution networks. It uses high-purity SF6 gas as the insulation and arc extinguishing medium, and is strictly developed and manufactured in accordance with GB3804-2004, GB16926-2009, and IEC 62271-105 standards. The rated voltage is 10KV, the rated frequency is 50Hz, the rated current is 630A, and the mechanical life is ≥ 1200 cycles. The product adopts a high-strength epoxy resin integral casting and sealing structure, forming an independent inflatable chamber, equipped with a B-type double spring energy storage operating mechanism, which can achieve synchronous linkage operation of “closing opening grounding” three positions. The incoming and outgoing lines support cable or busbar connection, and are suitable for various installation forms such as ring main units, prefabricated substations, and switch stations. The core is used for main line branch control, high-power load switching, and equipment protection in medium and high voltage distribution networks. It can reliably disconnect normal load current, cable charging current, and no-load transformer current. It is the main equipment for high voltage distribution in industrial, urban distribution networks, and large public facilities.
Features
1. Main voltage adaptation, outstanding carrying capacity:
specially designed for the mainstream medium and high voltage levels of 10KV, the insulation structure and arc extinguishing system are strengthened and upgraded according to the 10KV voltage standard. The rated short-time withstand current can reach 31.5kA/3s, which can carry higher power distribution loads, adapt to the distribution needs of medium and high voltage distribution network main lines and high-power equipment, avoid equipment failures caused by load overload, and ensure stable operation of the distribution system.
2. Durable operating mechanism, precise and efficient operation:
equipped with B-type dual spring energy storage operating mechanism, optimized energy storage transmission structure, strong synchronization of opening and closing actions, fast response speed (opening time ≤ 20ms), mechanical life extended to 1200 cycles, adaptable to high-frequency load switching scenarios; Supports three operation modes: manual, electric, and remote control. The electric operation uses a PLC control module for higher accuracy and is suitable for intelligent unmanned distribution scenarios. Manual operation serves as an emergency backup to ensure reliable operation and maintenance in extreme situations.
3. Insulation arc extinguishing upgrade for better safety performance:
high-purity SF6 gas (purity ≥ 99.998%) is used as the insulation and arc extinguishing medium, and the rated pressure is increased to 0.06MPa at 20 ℃. The arc extinguishing chamber adopts a multi break structure design, which greatly improves the arc extinguishing efficiency and can effectively cut off various load currents at 10KV level. There is no open flame or harmful emissions during the arc extinguishing process; Optimization of overall sealing structure, SF6 gas leakage rate ≤ 3 × 10 ⁻⁸ Pa · m ³/s, stable insulation performance during long-term operation, eliminating the risk of insulation breakdown.
4. Improved protection level and wide environmental adaptability:
The shell is made of high-strength epoxy resin cast as a whole, with excellent compression resistance, impact resistance, and corrosion resistance. The protection level can reach IP65, which can effectively resist the influence of dust, moisture, strong ultraviolet rays, and slightly corrosive gases; The applicable temperature range is extended to -30 ℃~+45 ℃, and the altitude can be extended to 3000m. It can adapt to the power distribution needs of outdoor switch stations, high-altitude areas, and complex industrial environments without special modifications.
5. Intelligent integration, controllable operation and maintenance costs:
Equipped with an intelligent monitoring module, it can collect real-time data such as SF6 gas pressure, equipment operation status, line current and voltage, and support linkage with the intelligent distribution network system to achieve remote monitoring, fault alarm, data statistics and other functions; Daily operation and maintenance only require regular calibration of monitoring modules and inspection of gas pressure, without the need for frequent disassembly of equipment, significantly reducing labor and material costs for operation and maintenance, and adapting to the demand for intelligent upgrading of distribution networks.
The product has a rated peak withstand current of 80kA, a rated lightning impulse withstand voltage of 125kV between phases and to ground, 145kV between faults, a rated short-time power frequency withstand voltage of 75kV between phases and to ground, and 85kV between faults; a rated active load breaking current of 630A, a rated cable charging current of 80A, and a capacity to break an unloaded transformer of 2500kVA; SF6 gas rated pressure (gauge pressure at 20 ℃) 0.06MPa, equipped with gas density relay and sound and light alarm device, automatic alarm when pressure is below 0.05MPa;
The applicable environmental humidity is that the average daily relative humidity does not exceed 95%, the average monthly relative humidity does not exceed 90%, and there is no severe vibration or flammable vapor; The implementation standards include GB3804-2004, GB16926-2009, IEC 60265-1, and IEC 62271-105.
The product can be customized with outdoor protection versions, high-altitude versions, and intelligent upgrade versions. It can be equipped with fuses, lightning arresters, current transformers and other accessories to form a complete protection system. If you need detailed technical parameter tables, installation drawings, intelligent linkage solutions or sample applications, you can contact the manufacturer’s technical team for exclusive support.
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Specification
| Item | Unit | Data | |
| Rated voltage | kV | 10 | |
| Main circuit lightning impulse withstand voltage (Same,relative/between fracture surfaces) (peak value) | kV | 75 | 85 |
| Main circuit 1-minute power frequency withstand voltage (Same,relative/between fracture surfaces) (peak value) | kV | 28 | 32 |
| 1-minute power frequency withstand voltage of auxiliary circuit | kV | ||
| Rated current | A | 630 | |
| Transfer current | A | 870 | |
| 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
What are the core upgrade points between FLN36-10KV and FLN36-7.2KV products?
The core upgrade points are concentrated in three aspects: first, voltage adaptation and carrying capacity. 10KV products are adapted to mainstream medium and high voltage distribution network main lines, and the rated short-time withstand current is increased to 31.5kA, which can carry larger power loads, while 7.2KV products are mainly adapted to distribution network upgrade branch lines; The second is the operating mechanism and lifespan. The 10KV product adopts a B-type dual spring energy storage mechanism, which increases the mechanical lifespan to 1200 times and has a faster response speed. It supports three operating modes. The 7.2KV product is an upgraded spring mechanism with a mechanical lifespan of 1000 times; The third is insulation and protection. The rated SF6 pressure of 10KV products has been increased to 0.06MPa, with a protection level of IP65. The environmental adaptability range is wider, and it can adapt to outdoor and high-altitude complex scenarios. The protection level and pressure standards of 7.2KV products are relatively lower.
This product supports three operating modes. What should be noted when switching?
When switching between the three operating modes, the principle of “power off first, switch again, and operate later” should be followed: first, cut off the equipment control power supply, confirm that the load switch is in the open state and the mechanical interlock is unlocked; Secondly, switch the operation mode (manual/electric/remote) according to the requirements, and check whether the mode indicator light is on normally after switching to ensure that the switch is in place; Finally, perform the opening and closing operation, and confirm that the equipment is running normally after the operation is completed. Please note that during remote operation, it is necessary to confirm that the communication between the backend monitoring system and the device is normal. When manually operating, the electric control handle should be removed to avoid triggering both modes simultaneously and causing damage to the mechanism.
The product has a protection level of IP65, can it be directly used for outdoor installation?
Can be directly used for outdoor installation. The protection grade of the product reaches IP65, which can effectively insulate rainwater, dust, mosquitoes and other external debris. The shell is made of anti ultraviolet and anti-aging epoxy resin, which can withstand outdoor long-term sun and rain; However, when installing outdoors, two points should be noted: first, choose a location with high terrain and no standing water to avoid the equipment being soaked in rainwater; Secondly, in cold regions (≤ -25 ℃), a low-temperature adaptation version should be selected, equipped with anti freezing seals and low-temperature lubricating grease, to avoid low temperature causing the operating mechanism to jam and ensure the normal operation of the equipment.
Will the malfunction of the intelligent monitoring module affect the normal operation of the equipment? How to handle?
When the intelligent monitoring module malfunctions, it will not affect the normal opening and closing operations of the equipment, but will only lose remote monitoring, data collection, and fault alarm functions, ensuring that power distribution operations are not affected. Solution: First, confirm whether the power supply and wiring of the monitoring module are normal. If it is a power or wiring problem, adjust it and restart the module; If there are no abnormalities in the power supply and wiring, it may be a fault in the internal components of the module. Professional technicians should be contacted to disassemble and replace the monitoring module. After replacement, data calibration should be carried out to ensure that the monitoring function is restored to normal. It is strictly prohibited to disassemble the internal structure of the module by oneself.
Can this product be used for front-end protection of large transformers with a capacity of 2500kVA for disconnecting no-load transformers?
It can be used for front-end protection of large transformers, but it needs to be combined with fuses to form a composite electrical device. This product can achieve normal switching of the transformer by breaking the no-load current of the transformer; But when a transformer experiences a short circuit fault, the short-circuit current is large, and it is necessary to rely on fuses to quickly cut off the short-circuit current, trigger the load switch to open, and form complementary protection to avoid damage to the transformer and distribution equipment caused by short-circuit current. Suggest matching fuses with transformer capacity to ensure precise and reliable protection actions, and to meet the front-end distribution protection requirements of large transformers.
Related Applications
Urban medium and high voltage distribution network main line: As the core branch equipment of urban medium and high voltage distribution network main line, it is installed in outdoor switch stations and ring main cabinets of urban main roads and commercial centers. It is responsible for distributing 110KV/35KV high voltage electricity after voltage reduction (10KV) to various regional branch lines, carrying high-power electricity loads for urban residents’ living, commercial offices, and public facilities. It can achieve load switching and fault isolation between main and branch lines, avoid branch line faults affecting the power supply of main lines, and ensure the continuity and reliability of urban distribution network. It is one of the core equipment in urban distribution network construction.
Main distribution network of large industrial plants: used for the main distribution network system of large industrial plants (such as steel plants, large chemical plants, and automobile manufacturing plants), installed in the prefabricated substation of the central distribution station of the plant, responsible for converting high voltage electricity into 10KV medium high voltage electricity and distributing it to high-power production equipment in various production workshops (such as steelmaking furnaces, large reactors, and assembly production lines), which can bear high-frequency and high-power load switching requirements. The perfect insulation arc extinguishing performance can avoid production interruption caused by short circuit faults, and the intelligent monitoring function facilitates unmanned operation and maintenance of the plant distribution network, ensuring continuous and stable industrial production.
Supporting distribution of large-scale new energy power stations: Suitable for centralized photovoltaic power stations and large-scale wind farms, the supporting distribution network system is installed in the distribution room of the power station’s booster station, responsible for collecting and distributing the electricity generated by new energy generation equipment (photovoltaic modules, wind turbines), boosting low-voltage electricity to 10KV and transmitting it to the main line, and then integrating it into the national power grid; The high reliability and environmental adaptability of the product can adapt to the complex outdoor environment of new energy power plants (strong winds, high ultraviolet radiation, large temperature difference between day and night). The intelligent function can realize remote monitoring of the power plant distribution network, improve operation and maintenance efficiency, and ensure stable transmission of new energy power.
Main distribution system for large public facilities: used for the main distribution system of large public facilities such as train stations, international airports, sports centers, exhibition centers, etc., installed in underground distribution stations of public facilities, responsible for providing stable 10KV power to high-power equipment such as central air conditioning, elevators, lighting systems, emergency power supply equipment, etc. It can achieve graded control and protection of power distribution in various areas of public facilities, avoid single area faults affecting overall power consumption, and ensure the electrical safety of public facilities during peak pedestrian flow and large-scale events, adapting to the high reliability power distribution needs of public facilities.
