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FLN36-6.6
FLN36-6.6 SF6 Load Break Switch
FLN36-6.6KV SF6 load switch is an indoor AC high voltage switchgear specially developed for special medium voltage distribution network scenarios. It uses high-purity SF6 gas as the insulation and arc extinguishing medium, strictly follows GB3804-2004 and IEC related standards for manufacturing, has a rated voltage of 6.6KV, a rated frequency of 50/60Hz, a rated current of 630A, and a mechanical life of ≥ 1000 cycles. The product adopts a reinforced sealing structure, and the epoxy resin casting shell has higher strength. It is equipped with an A-type double spring operating mechanism, which can achieve precise operation of “closing opening grounding” three positions. It supports fuse linkage tripping function, and the incoming and outgoing lines can be adapted to cable connection or busbar connection. It is mainly used in medium voltage distribution network scenarios with high requirements for voltage accuracy and protection reliability. It can effectively disconnect normal load current, short-circuit transfer current and no-load transformer current, taking into account both universality and particularity, and is suitable for the distribution needs of various special industries.
Features
1. Precise voltage adaptation and specialized optimization design:
For the 6.6KV special voltage level, the insulation structure and arc extinguishing system are precisely matched according to the 6.6KV voltage level to avoid operational failures caused by voltage adaptation deviations. It can stably adapt to the medium voltage distribution needs of special industries, control voltage fluctuations within a very small range, and ensure the electrical stability of precision equipment and special production processes.
2. Upgraded operating mechanism with excellent linkage performance:
equipped with A-type double spring operating mechanism, compared with conventional single spring mechanism, it has more abundant energy storage, smoother operation, longer mechanical life, and supports fuse action impact release function, which can achieve precise linkage with the fuse. When a short circuit fault occurs in the circuit, the fuse can quickly trigger the load switch to open after melting, achieving rapid cutting off of the short circuit fault and more reliable protection performance.
3. Enhanced sealing performance and strong anti-interference ability:
Adopting a reinforced sealing structure, paired with high-quality sealing components, the SF6 gas leakage rate is much lower than industry standards, and can maintain stable rated pressure for a long time; The epoxy resin casting shell has high strength, corrosion resistance and aging resistance, which can effectively resist the impact of dust, moisture and slightly corrosive gas. It is suitable for use in special environments such as mines and chemicals, and its operation stability is not affected by environmental factors.
4. Multi functional adaptation and strong scalability:
supports two types of incoming and outgoing lines, cable connection and busbar connection, which can flexibly adapt to different distribution layout scenarios; According to demand, accessories such as fuses, current transformers, lightning arresters, etc. can be matched to form a complete distribution protection system; Simultaneously supporting auxiliary contact expansion, it can achieve remote monitoring, fault alarm and other functions, adapting to the upgrade needs of unmanned and intelligent distribution scenarios.
5. Comprehensive safety protection and convenient operation and maintenance:
equipped with multiple safety protection devices such as safety diaphragms, mechanical interlocks, and position indicators. The safety diaphragm can release gas when the internal pressure is too high, avoiding equipment damage and personnel injury; Mechanical interlocking eliminates misoperation and provides clear and intuitive position indication; Daily operation and maintenance only require regular checks of gas pressure and operating mechanism status, without the need for complex debugging, resulting in low operation and maintenance costs and high efficiency.
The product has a rated short-time withstand current of 25kA/3s, a rated peak withstand current of 62.5kA, a rated lightning impulse withstand voltage of 80kV between phases and ground, 90kV between faults, a rated short-time power frequency withstand voltage of 45kV between phases and ground, and 50kV between faults. The rated pressure of SF6 gas (gauge pressure at 20 ℃) is 0.045MPa, and the leakage rate is ≤ 5 × 10 ⁻⁸ Pa · m ³/s;
The applicable ambient temperature is -25 ℃~+40 ℃, the altitude can be extended to 2500m, the average daily relative humidity does not exceed 95%, it can tolerate slightly corrosive gases, dust and vibration, and is suitable for complex environments in special industries;
The implementation standards include GB3804-2004, GB16926-2009, IEC 60265-1, and IEC 62271-105. The product can be customized to adapt to special environments such as high altitude, high humidity, and corrosion resistance, and can also provide intelligent upgrade solutions to achieve remote monitoring and data collection of equipment operation status. For detailed technical parameters, customized solutions, and installation and operation manuals, please contact the manufacturer’s technical team for support.
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Specification
| Item | Unit | Data | |
| Rated voltage | kV | 6.6 | |
| 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 | 2500 |
| 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
What is the core difference between FLN36-6.6KV and FLN36-6KV products? Why not directly use 6KV products as a substitute?
The core difference lies in the voltage adaptation accuracy and mechanism configuration: FLN36-6.6KV is specially designed for the 6.6KV special voltage level, and the insulation gap and arc extinguishing parameters are accurately matched to the 6.6KV voltage, which can avoid insulation aging, arc extinguishing failure and other problems caused by voltage adaptation deviation; FLN36-6KV products are compatible with 6KV voltage levels. If used in 6.6KV scenarios, insulation performance may decrease due to voltage overload, posing safety hazards during long-term operation. In addition, the 6.6KV product is equipped with an A-type double spring operating mechanism that supports fuse linkage tripping, providing better protection performance and suitable for special scenarios with high protection reliability requirements. It cannot be directly replaced by a 6KV product.
This product supports a frequency of 60Hz. Can it be used in the distribution scenario for imported equipment?
Sure. The rated frequency of this product supports 50/60Hz bidirectional adaptation, with a voltage level of 6.6KV, which can perfectly adapt to the matching power distribution needs of imported equipment (such as imported precision machine tools, imported production lines). Most imported equipment adopts a 60Hz frequency design, and this product can stably match the frequency requirements of the equipment. At the same time, precise voltage control can ensure the operation stability of imported precision equipment, avoiding equipment damage or operation failure caused by frequency and voltage mismatch. It is widely used in the power distribution system of foreign-funded enterprises and imported equipment supporting factories.
What are the advantages of the A-type double spring operating mechanism compared to the K-type single spring mechanism?
The main advantages are reflected in three aspects: firstly, more sufficient energy storage, smoother operation, faster opening and closing action speed, which can effectively improve arc extinguishing efficiency and avoid arc extinguishing failure caused by insufficient energy storage of the operating mechanism; Secondly, it supports the linkage tripping function of fuses, which can achieve precise linkage with fuses, with faster response speed and more reliable protection performance in case of short circuit faults; Thirdly, the mechanical wear is smaller, the mechanical lifespan is longer, and the stability under long-term frequent operation is better. It is suitable for special scenarios with frequent load switching and does not require frequent maintenance or replacement of mechanism components.
This product is suitable for high-altitude scenarios. What should be noted when using it in high-altitude areas?
When used in high-altitude areas (altitude>1000m), the high-altitude customized version should be selected. The manufacturer will optimize the insulation structure, increase the insulation gap, and ensure that the insulation performance of the product meets the standard for high-altitude and low-pressure environments; At the same time, it is necessary to regularly check the SF6 gas pressure. In high-altitude areas where the pressure is lower, the gas pressure may slightly decrease. The pressure standard should be adjusted according to the environmental altitude to avoid low pressure affecting equipment operation; In addition, it is necessary to provide cold protection for the equipment. In high-altitude areas where the temperature is lower in winter, it is necessary to ensure that the operating environment temperature of the equipment is not lower than -25 ℃ to avoid low temperature causing the operating mechanism to jam and the sealing components to age.
How to reset the product after the fuse is blown?
First, cut off the power supply of the equipment, confirm that the load switch is in the open state, open the equipment cabinet door, remove the blown fuse, and replace it with a fuse of the same model and specification; After the replacement is completed, check that the fuse is securely installed and confirmed to be correct. Close the equipment cabinet door, unlock the mechanical interlock, operate the load switch to close, and complete the reset operation; After resetting, it is necessary to check the operating status of the equipment and confirm that there are no abnormalities before restoring normal power supply; If the fuse frequently blows, it is necessary to check whether there is a short circuit fault in the circuit to avoid damaging the equipment again.
Related Applications
Underground and surface main distribution network in mines: Suitable for underground and surface main distribution network systems in the mining industry (coal mines, metal mines), 6.6KV is the mainstream medium voltage level in the mining industry. This product can be installed in the ring main unit of underground distribution stations and surface main distribution stations in mines, responsible for the distribution control and protection of core equipment such as main ventilation fans, drainage pumps, and elevators in mines; The reinforced sealing structure of the product can resist dust and humid environments underground in mines, and the linkage protection function can quickly cut off short-circuit faults, avoiding the impact of faults on mining production safety and providing reliable power guarantee for normal mining production.
Medium voltage distribution in chemical industrial parks: Used for the medium voltage distribution system in chemical industrial parks where there are complex environments such as slightly corrosive gases and dust. The reinforced sealing and corrosion-resistant structure of this product can adapt to such environments and avoid equipment failures caused by environmental factors; The 6.6KV voltage level can meet the electrical needs of high-power equipment such as reaction vessels, conveying pumps, and environmental protection devices in chemical industrial parks. The comprehensive safety protection can avoid safety accidents caused by operational errors and equipment failures, ensuring continuous and stable chemical production. At the same time, it is suitable for the intelligent and unmanned power distribution needs of chemical industrial parks.
Imported equipment supporting power distribution: Suitable for the power distribution system of foreign-funded enterprises and imported equipment supporting factories, such as imported precision machining plants, imported electronic production lines, imported pharmaceutical equipment factories, etc. Most of these imported equipment are designed with a voltage frequency of 6.6KV and 60Hz. This product can accurately match the voltage and frequency requirements of the equipment, and stable power supply performance can ensure the operation accuracy of imported precision equipment, avoiding equipment damage or product quality problems caused by voltage and frequency fluctuations. At the same time, it can achieve linkage with the imported equipment control system and improve the level of intelligent power distribution.
New energy supporting distribution: Used for supporting distribution systems of new energy projects such as wind power and photovoltaics, such as auxiliary distribution of wind farm boosting stations and inverter supporting distribution of photovoltaic power stations. The 6.6KV voltage level can adapt to the medium voltage distribution needs of new energy projects, and the high reliability of the product can adapt to the complex outdoor environment of new energy projects (such as strong vibration in wind power scenarios and high ultraviolet radiation in photovoltaic scenarios). At the same time, it supports remote monitoring function, which can achieve unmanned operation of new energy distribution systems, improve operation and maintenance efficiency, and ensure stable transmission of new energy electricity.
