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NSHBG-10
NSHBG-10 Environmentally friendly gas-insulated ring main unit
NSHBG-10 10kV environmentally friendly gas insulated ring main unit is the main equipment for green upgrading of domestic urban and rural distribution networks. It uses a mixture of dry air and new environmentally friendly inert gas as a medium to replace traditional SF ₆ gas. The core components are integrated into a high-strength sealed gas box, which combines compact structure and high reliability. The equipment strictly follows the requirements of GB/T 11022 and the “Action Plan for Construction and Renovation of Distribution Networks”, and is optimized for the characteristics of dispersed loads and different operation and maintenance conditions in domestic urban and rural power grids. It can flexibly adapt to installation environments such as outdoor box transformers and indoor distribution rooms, and is the preferred equipment for rural power grid renovation and low-carbon upgrading of parks, taking into account environmental compliance and cost-effectiveness.
Features
1. Wide adaptability between urban and rural areas, compatible with various topology structures such as star and ring networks of domestic 10kV distribution networks, and can seamlessly integrate with equipment such as rural power grid transformers, distributed photovoltaics, charging piles, etc., without the need for complex renovations.
2. Balancing low-carbon and low-cost, with a mixed gas GWP value approaching 1, no greenhouse effect, a 30% reduction in gas filling compared to traditional equipment, and a manufacturing cost lower than high-end environmentally friendly models, suitable for large-scale popularization.
3. Minimalist operation and maintenance, the gas box adopts integrated sealing technology, with a leakage rate of ≤ 0.1%/year. It can operate normally for 8-10 years without the need for air replenishment, and is equipped with a simple intelligent monitoring module to adapt to grassroots operation and maintenance capabilities.
4. Upgraded weather resistance, optimized anti condensation and anti-corrosion design, able to withstand -40 ℃ severe cold and+70 ℃ high temperature, suitable for complex climates such as northern rural areas and southern humid and hot regions.
Rated current range: 630A-2500A, rated short-circuit breaking current: 16kA-31.5kA, air box protection level IP67, supports IP68 short-term immersion optional. The operation mode supports manual, electric, and remote control, compatible with DL/T 634.5.1-2002 communication protocol, and can be connected to county-level distribution network automation platform. The module combination covers 1-8 circuits and supports two configurations: load switch+fuse and vacuum circuit breaker, meeting the different needs of branch distribution and main line protection. The overall weight of the equipment is reduced by 20% compared to traditional models, making it easy to transport and install.
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Specification
| Serial No. | Item | PT Module | V Module | |
| Disconnecting Switch | Vacuum Circuit Breaker | Isolation/Earth Switch | ||
| 1 | Rated Voltage | 10 | ||
| 2 | 1min Power Frequency Withstand Voltage | 28/32 | ||
| 3 | Lightning Impulse Withstand Voltage | 75/85 | ||
| 4 | Rated Current | 630 | 630 | 630 |
| 5 | Short-Circuit Breaking Current | 20 | ||
| 6 | Short-Circuit Making Current | 50 | ||
| 7 | Short-Time Withstand Current | 20 | 20 | 20 |
| 8 | Short-Circuit Duration | 4 | 4 | 4 |
| 9 | Mechanical Life | 5000 | 10000 | 5000 |
| 10 | Gas Pressure | 0.025（20℃） | ||
| 11 | Annual Leakage Rate | ≤0.01% | ||
| 12 | Arc Extinguishing Method | Vacuum Arc Extinguishing | ||
| 13 | Protection Class | IP67/4X (Tank/Enclosure) | ||
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FAQs
Does the installation of this device in rural power grids require special foundations?
No special foundation is required. The bottom of the equipment adopts standardized installation interfaces, which can be directly fixed to concrete pedestals or simple steel structures. It is suitable for rural, outdoor, roadside and other scenarios without dedicated distribution rooms, with low installation costs.
Are there any safety hazards after a mixed gas leak?
No safety hazards, the gas is a non-toxic, odorless, inert mixture that can naturally diffuse after leakage, does not pollute soil and water sources, and the equipment is equipped with a pressure alarm device to promptly warn of leakage situations.
Can it be adapted to self use photovoltaic projects in rural power grids?
Fully compatible, can optimize arc extinguishing characteristics for photovoltaic output fluctuations, supports bidirectional current monitoring, can be linked with photovoltaic inverters and energy storage modules, and meets the needs of distributed energy grid connection in rural power grids.
Related Applications
Rural power grid upgrade and renovation scenario: adapted to the current situation of narrow rural roads, rudimentary distribution rooms, and insufficient operation and maintenance personnel, the compact size can be flexibly installed in village entrance box transformers or field distribution points. The low temperature resistance and anti condensation design can cope with the large temperature difference and high humidity environment in rural areas, providing stable power supply for irrigation pumps, villagers’ residences, and rural shops. At the same time, the environmentally friendly gas meets the needs of rural ecological protection, helping the rural power grid upgrade from “using electricity” to “using electricity well”.
Low carbon power distribution scenario in light industry parks: For light industry workshops such as food processing, textiles, and furniture, sealed gas boxes can isolate pollutants such as cotton wool, dust, and water vapor, avoiding component failures that affect production. Low noise operation (≤ 55 decibels) does not interfere with workshop operations, and its environmental attributes can help the park apply for a green factory. The modular design can gradually expand with the expansion of the production line, balancing production continuity and low-carbon goals.
Scenario of power distribution renovation in old residential areas: To adapt to the problems of limited space and aging lines in the distribution room of old residential areas, traditional SF cabinets can be replaced in situ without the need to expand the distribution room. The anti overload and anti short circuit design can cope with new loads such as charging piles and air conditioning in residential areas, with no risk of leakage of environmentally friendly gases, ensuring the safety of residents’ living. At the same time, the intelligent monitoring function can remotely troubleshoot faults and reduce interference with residents’ lives.
Power distribution scenarios for highway service areas and post stations: Suitable for outdoor installation environments, with a wide temperature tolerance that can withstand extreme weather along the highway, and a sealed structure that can isolate wind, sand, and rainwater erosion. To provide power supply for charging stations, catering facilities, lighting systems, and emergency equipment in the service area, low maintenance requirements can reduce inspection frequency, ensuring 24-hour uninterrupted power supply in the high-speed service area, and meeting the requirements of green transformation in the transportation sector.
