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FLN36-11
FLN36-11 SF6 Load Break Switch
FLN36-11KV SF6 load switch is an indoor/outdoor universal AC high voltage switchgear developed specifically for the special 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 11KV, the rated frequency is 50/60Hz, the rated current is 630A, and the mechanical life is ≥ 1200 cycles. The product adopts a high-strength epoxy resin segmented casting sealing structure, combined with stainless steel shell protection, equipped with a C-type double spring energy storage operating mechanism, which can achieve independent operation and linkage locking of the “closing opening grounding” three positions. The incoming and outgoing lines support bidirectional adaptation of cables and busbars, and are suitable for installation forms such as ring main units, prefabricated substations, outdoor switch stations, and special industry specific distribution stations. The core is used for load control and equipment protection of medium and high voltage distribution network trunk line extension, cross-border project matching, and special high-power scenarios. It can reliably disconnect normal load current, cable charging current, no-load transformer current, and short-circuit transfer current, and balance universality and special adaptability. It is the core preferred equipment for 11KV voltage level distribution network.
Features
1. Specialized voltage adaptation and cross-border compatibility:
Optimized specifically for 11KV medium and high voltage levels, the insulation gap and arc extinguishing parameters are accurately matched to the 11KV voltage standard. It also supports 50/60Hz dual frequency adaptation, which can perfectly meet the distribution needs of domestic special distribution network scenarios and cross-border projects (such as some Southeast Asian and African countries), avoiding equipment failures caused by voltage and frequency mismatch. It can be directly put into use without additional modification, and the adaptability is more targeted.
2. Upgraded operating mechanism for better locking performance:
Equipped with a C-type dual spring energy storage operating mechanism, the transmission structure is optimized based on the B-type mechanism, resulting in smoother opening and closing actions and faster response speed (opening time ≤ 18ms). While maintaining a mechanical lifespan of 1200 cycles, the “opening locking” function has been added to lock the opening position in case of a fault, preventing secondary accidents caused by misoperation; Supports three operation modes: manual, electric, and remote control. The electric operation adopts an intelligent control module, which can achieve operation log recording and facilitate operation and maintenance traceability.
3. Insulation arc extinguishing strengthening, adaptation to extreme working conditions:
Ultra high purity SF6 gas (purity ≥ 99.999%) is used as the insulation and arc extinguishing medium, and the rated pressure is increased to 0.065MPa at 20 ℃. The arc extinguishing chamber adopts a new multi break arc extinguishing structure, and the arc extinguishing efficiency is increased by 15% compared to 10KV products, which can effectively meet the breaking requirements of various complex load currents at 11KV level; Segmented sealing structure with stainless steel shell, leakage rate ≤ 2 × 10 ⁻⁸ Pa · m ³/s, insulation performance not affected by extreme working conditions such as high and low temperature, high humidity, and slight corrosion, suitable for more complex operating environments.
4. The protection grade is upgraded, and it is common for indoor and outdoor use:
the shell is made of high-strength epoxy resin poured in sections+stainless steel protective shell, and the protection grade can reach IP66, which can effectively resist the invasion of rainstorm, strong wind, dust, ultraviolet light and slightly corrosive gas, and can be directly used for outdoor installation without additional protection; The applicable ambient temperature range can be extended to -35 ℃~+50 ℃, and the altitude can be extended to 3500m. It can adapt to extreme environments such as high altitude, high temperature, and high cold, and can be used in both indoor and outdoor scenarios without distinguishing between model purchases.
5. Improved convenience of operation and maintenance, controllable throughout the entire lifecycle:
Built in intelligent operation and maintenance module, in addition to conventional monitoring functions, newly added SF6 gas leakage online detection and operating mechanism wear warning functions, which can predict equipment failures in advance and reduce operation and maintenance risks; The components adopt standardized and universal design, and vulnerable parts can be partially interchangeable with products of the same series, making replacement convenient in the later stage. At the same time, remote operation and maintenance debugging are supported, greatly reducing on-site operation and maintenance costs and achieving controllable equipment lifecycle.
The product has a rated peak withstand current of 85kA, rated lightning impulse withstand voltage of 135kV between phases and to ground, 155kV between faults, rated short-time power frequency withstand voltage of 80kV between phases and to ground, 90kV between faults;
rated active load breaking current of 630A, rated cable charging current of 100A, capable of breaking no-load transformer capacity of 3150kVA, rated short-circuit transfer current of 25kA; SF6 gas rated pressure (gauge pressure at 20 ℃) of 0.065MPa, equipped with gas density relay, sound and light alarm device, and leakage detection sensor. When the pressure is below 0.055MPa, it will automatically alarm and upload data;
The applicable environmental humidity is a daily average relative humidity not exceeding 95% and a monthly average relative humidity not exceeding 90%. It can withstand slight corrosive gases, strong vibrations, and high and low temperature impacts;
The implementation standards include GB3804-2004, GB16926-2009, IEC 60265-1, IEC 62271-105, and are compatible with some international distribution standards. The product can be customized with cross-border project specific versions, extreme environment adaptation versions, and intelligent upgrade versions. It can be equipped with fuses, lightning arresters, current transformers, voltage transformers and other accessories to form a complete protection system. If you need detailed technical parameter tables, installation drawings, cross-border project adaptation plans 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 | 11 | |
| 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 is the core difference between FLN36-11KV and FLN36-10KV products? Why not directly replace it with 10KV products?
The core difference lies in voltage adaptation, frequency compatibility, and working condition adaptation: 11KV products are specially designed for 11KV voltage levels, with precise matching of insulation and arc extinguishing parameters, and support for 50/60Hz dual frequencies, suitable for cross-border projects and domestic special distribution networks; 10KV products are only suitable for 10KV and 50Hz scenarios. If used in 11KV scenarios, insulation breakdown and arc extinguishing failure may occur due to voltage overload, posing serious safety hazards during long-term operation. In addition, the protection level of the 11KV product has been upgraded to IP66, supporting online leakage detection and stronger adaptability to extreme environments. The operating mechanism has added a tripping and locking function, which provides better protection performance and cannot be directly replaced by 10KV products.
This product supports cross-border project support. What should be noted when exporting?
There are three points to note when exporting supporting products: first, confirm the voltage and frequency standards of the target country/region. Although this product supports 50/60Hz dual frequency, the operating voltage needs to be adjusted according to the requirements of the target region (AC220V/AC110V/DC220V can be customized); The second is to confirm the local implementation standards. Manufacturers can provide testing reports and certification documents that meet the standards of the target region to ensure product compliance and admission; Thirdly, according to the environment of the target area, customize the adaptive version (such as the version against high temperature in tropical areas, the version with enhanced sealing in rainstorm areas), and provide English installation manuals and operation and maintenance manuals to facilitate the operation and maintenance of local staff.
The product supports online detection of SF6 gas leakage. How to ensure the accuracy of the detection data?
To ensure the accuracy of the detection, two points need to be done: first, before the product leaves the factory, the leakage detection sensor will be strictly calibrated to ensure an accuracy error of ≤± 0.001MPa, and standard calibration tools will be provided at the same time; Secondly, during daily operation and maintenance, sensors should be calibrated every 6 months to avoid data bias caused by sensor aging; In addition, the sensor adopts waterproof, dustproof, and anti-interference design, which can effectively avoid environmental factors affecting the detection results. If abnormal data is detected, the equipment will synchronously trigger sound and light alarms and upload them to the background. The staff can promptly investigate and handle them to ensure the safe operation of the equipment.
The product has a protection level of IP66. What additional protective measures are required for outdoor installation?
The protection level of IP66 can meet the needs of most outdoor scenarios, and additional protection only requires two points: first, choose a location with high terrain, no water accumulation, and no strong impact during installation to avoid equipment being soaked in rainwater or damaged by external forces; Secondly, in high-altitude regions (≤ -30 ℃), it is necessary to choose a low-temperature adaptation version and install a cold proof heating device for the operating mechanism to avoid mechanism jamming and seal aging caused by low temperatures; Sunshades can be installed in tropical regions to reduce direct UV radiation and extend the lifespan of the casing without the need for additional sealing protection.
The vulnerable parts of the product can be used interchangeably with products in the same series. Which specific vulnerable parts can be used interchangeably? What should be noted when replacing?
Common vulnerable parts include springs, seals, auxiliary contacts of the operating mechanism, as well as small accessories such as gas density relays and indicator lights, which can be used with products of the same series as 10KV and 12KV to reduce spare parts procurement costs. Attention should be paid when replacing: firstly, ensure that the model and specifications of vulnerable parts match the equipment, and it is strictly prohibited to mix accessories of different specifications; The second is to cut off the power supply of the equipment before replacement, confirm that the load switch is in the open and grounded state, and unlock the mechanical interlock; Thirdly, after replacing the seals and gas related accessories, the equipment needs to undergo gas leakage testing to confirm that there are no leaks and the pressure meets the standard before it can be put back into operation.
Related Applications
Large scale heavy industry special distribution: used in heavy industry scenarios such as large metallurgical plants, heavy machinery plants, and large mining main distribution networks. These scenarios have high electricity loads, frequent load fluctuations, and complex working conditions such as slight corrosion and strong vibration. The 11KV voltage level can meet the electricity needs of high-power equipment. The product’s reinforced insulation and arc extinguishing performance can effectively cope with frequent load switching and short circuit risks. The opening and locking function of the operating mechanism can avoid misoperation in fault states. The stainless steel shell can resist the influence of corrosion and vibration, ensuring continuous and stable electricity supply for heavy industry production.
Outdoor distribution network in high temperature/cold regions: It is suitable for outdoor distribution network systems in tropical high temperature regions and northern high cold regions, such as outdoor switching stations in tropical Hainan and Yunnan, and distribution network branch lines in northeast high cold regions. The environmental adaptation range of this product is -35 ℃~+50 ℃, which can perfectly cope with extreme temperature difference. IP66 protection level can withstand tropical rainstorm, high cold and snowstorm. The low temperature adaptation characteristics of SF6 gas can avoid low-temperature liquefaction, ensure normal operation of equipment in extreme environments, and provide reliable power support for residents’ lives and industrial production in high temperature and cold regions.
Main distribution system for large data centers: used for the main distribution network system of large data centers. The data center has a high power load and extremely high requirements for power supply reliability, and no power interruption is allowed. The 11KV voltage level can ensure stable power supply for high-power servers and refrigeration equipment. This product can be installed in the ring network cabinet of the underground distribution station of the data center, responsible for load control and protection of the main distribution line. The intelligent leak detection and fault warning functions can predict equipment failures in advance, avoiding power interruption caused by faults. At the same time, the three operation modes can achieve flexible operation and maintenance, adapting to the 24-hour unmanned operation needs of the data center.
