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NSRM-11
NSRM-11 SF6 gas-insulated ring main unit
The 11kV SF6 charging cabinet is a medium voltage switchgear designed specifically for overseas markets and some special distribution network scenarios in China. It uses SF6 gas as the insulation and arc extinguishing medium, adopts a modular and compact design, and the gas box is sealed as a whole. The core components are selected with stronger weather resistance and anti-interference properties. This voltage level complies with international standards such as IEC 62271 and is suitable for distribution network architectures in Southeast Asia, Africa, the Middle East, and other regions. It can also meet the exclusive power supply needs of some old power plants and foreign-funded enterprises in China, with cross regional adaptability and stable outdoor operation performance.
Features
1. International adaptation, strictly following international electrical standards for design and manufacturing. Parameters such as voltage, frequency, and installation dimensions can be customized according to target market needs, and are compatible with mainstream overseas distribution equipment interfaces.
2. Excellent resistance to harsh environments, the air box is treated with anti-corrosion coating, which can withstand extreme weather conditions such as high temperature, high humidity, salt spray, sand and dust, suitable for use in tropical, subtropical and desert areas, with a protection level of IP68 (short-term immersion).
3. High arc extinguishing efficiency, adopting optimized SF6 gas flow field design, fast short-circuit breaking speed, good medium recovery performance after arc extinguishing, and can effectively cope with power grid impact loads.
4. Full life cycle guarantee, equipped with gas leakage online monitoring device, combined with remote diagnosis system, can predict equipment failures in advance, reducing the difficulty of overseas operation and maintenance.
Rated current range: 630A-2500A, rated short-circuit breaking current: 16kA-31.5kA, gas filling capacity customized according to gas box volume, mean time between failures (MTBF) ≥ 100000 hours. Supports IEC 61850 communication protocol, seamlessly integrates with overseas intelligent distribution network systems, and has advanced functions such as fault recording and harmonic monitoring. The gas box is made of stainless steel material with a service life of over 20 years. The components are selected from internationally renowned brands to ensure reliability in complex power grid environments. At the same time, customized packaging solutions are provided to meet cross-border transportation needs.
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Specification
| Item | Unit | Model C | Model F | Model V | Model CB |
| Rated voltage | kV | 11 | 11 | 11 | 11 |
| Rated frequency | Hz | 50 | 50 | 50 | 50 |
| Power frequency withstand voltage (phase to phase/port) | kV | 28/32 | 28/32 | 28/32 | 28/32 |
| Lightning impulse withstand voltage | kV | 75/85 | 75/85 | 75/85 | 75/85 |
| Rated current | A | 630 | – | 630/1250 | 630/1250 |
| Rated closed-loop breaking current | A | 630 | 630 | – | – |
| Rated cable charging breaking current | A | 135 | 135 | – | – |
| Rated short-circuit closing current (peak) | A | 50 | 80 | 50 | 50 |
| Rated peak withstand current | A | 50 | – | 50 | 50 |
| Rated short-time withstand current | kA/3s | 20 | – | 20 | 20 |
| Rated short-circuit breaking current | kA | 20 | 31.5 | 20 | 25 |
| Rated transfer current | A | – | 1750 | – | – |
| Maximum current of equipped fuse | A | – | 125 | – | – |
| Circuit resistance | -n | ≤300 | ≤600 | ≤300 | ≤300 |
| Mechanical lifespan | times | 5000 | 5000 | 5000 | 5000 |
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FAQs
Can the 11kV SF6 charging cabinet adapt to the voltage and frequency requirements of different countries?
Yes, it can be customized with 50Hz/60Hz frequency adaptation, and the voltage fluctuation range supports ± 10%, which can meet the distribution network parameter requirements of different countries and regions.
How to ensure the sealing performance of equipment during overseas transportation?
Adopting vacuum packaging and shock-absorbing buffer structure, strict air tightness and pressure resistance tests are conducted before transportation, equipped with dedicated transportation fixing frames to avoid deformation of the air box and damage to the seals. On site inspection services can be provided upon arrival.
What is the overseas after-sales response time after the equipment malfunctions?
We have service outlets in multiple regions around the world, with a regular fault response time of ≤ 48 hours. We can provide remote technical guidance, dispatch engineers for on-site repairs for complex faults, and provide sufficient spare parts reserves.
Related Applications
Construction of urban distribution networks in overseas countries
Adapt to the distribution network architecture of Southeast Asia, Africa, the Middle East and other regions, strictly follow the IEC 62271 international standard, customize parameters according to the voltage frequency and installation specifications of the target country, and be compatible with local mainstream distribution equipment interfaces. Faced with the climate characteristics of high temperature, high humidity, and sandstorms in some countries, the anti-corrosion coating and IP68 protection level of the gas box can effectively resist harsh environmental erosion. The remote diagnosis system can reduce the difficulty of overseas operation and maintenance, and help the local distribution network achieve stable and efficient operation.
Cross border investment projects in industrial parks
In response to the diverse load demands of cross-border industrial parks, it has a flexible modular design that can quickly adapt to the power supply requirements of different production equipment. It also supports 50Hz/60Hz frequency and wide voltage fluctuation range adaptation, and can be integrated into the local power grid without additional modifications. Sealed gas boxes can isolate workshop dust, oil pollution and other pollutants, extend equipment maintenance cycles, and with global after-sales network support, can effectively solve cross-border project operation and maintenance response problems, ensuring continuous power supply to production lines.
Supporting power distribution for oilfield exploitation
Adapting to the complex environment of remote areas and open-pit operations in oil fields, the gas box is made of stainless steel material and reinforced sealing structure, which can withstand high temperature exposure, sand and dust invasion, and short-term immersion, eliminating equipment failures caused by environmental factors. The optimized SF6 gas flow field design has high arc extinguishing efficiency and can cope with the power grid impact caused by motor start-up and load changes during oilfield exploitation, providing reliable power support for core devices such as pumping units and drilling equipment.
Port and dock power supply
In response to the serious problem of salt spray corrosion in coastal areas of ports, the equipment surface has undergone special anti-corrosion treatment, which can effectively resist the erosion of metal components by salt spray and ensure long-term outdoor operation stability. It can adapt to various types of loads such as port loading and unloading machinery, refrigeration and storage, lighting and navigation, with fast short-circuit breaking speed, and can quickly respond to sudden power supply failures. At the same time, it supports remote monitoring function, which facilitates centralized control by terminal operation and maintenance personnel and improves power supply guarantee efficiency.
Distribution of agricultural irrigation power in tropical regions
In line with the climate characteristics of high temperature, heavy rain, and high humidity in tropical regions, it has the ability to operate in a wide temperature range of -40 ℃ to+70 ℃ and anti condensation design to avoid the impact of water vapor condensation on equipment insulation performance. The compact structure can be flexibly installed in simple distribution rooms in the field, resistant to external interference such as mosquitoes and weeds, providing stable power supply for irrigation pumps, water fertilizer integrated machines and other equipment, adapting to the continuous power supply needs of agricultural production, and helping to promote the large-scale development of agriculture in tropical regions.
Exclusive power distribution scenario for foreign-funded enterprises’ factories in China: Balancing IEC international standards and domestic power supply regulations, perfectly adapting to the power supply needs of imported production equipment in foreign-funded factories, and stable operation without the need for additional conversion devices. The low-noise and explosion-proof design complies with factory safety production standards, and the sealed structure can effectively isolate impurities and water vapor in the workshop environment, reducing the probability of equipment failure and shutdown. At the same time, the long life cycle and low operation and maintenance cost characteristics meet the refined management needs of foreign-funded enterprises. This device is particularly suitable for cross-border power distribution projects that have strict requirements for international adaptability and resistance to harsh environments.
