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NSHBG-6
NSHBG-6 Environmentally friendly gas-insulated ring main unit
NSHBG-6 6kV environmentally friendly gas insulated ring main unit is a mainstream equipment for industrial distribution networks and urban branch lines in China. It uses environmentally friendly media such as CO ₂ mixed gas and dry air as insulation materials, adopts modular ring network design, integrates circuit breakers, load switches, transformers and other components, and has a sealed gas box structure that balances compactness and scalability. This device complies with GB/T 11022 and power industry standards, and is optimized for the design of domestic 6kV distribution network architecture. It is suitable for scenarios such as chemical, building materials, and urban branch distribution, and can meet the reliability of industrial power supply while achieving green environmental protection throughout the entire life cycle. It is an ideal replacement product for traditional SF ring main units.
Features
1. The power grid has strong adaptability and perfectly fits the mainstream architecture of the domestic 6kV distribution network. It has extremely high compatibility with equipment such as transformers, cables, and relay protection devices, and can replace traditional equipment without additional modifications.
2. Balancing environmental protection and performance, using low GWP environmentally friendly gas, balancing insulation and arc extinguishing performance with environmental requirements, with a gas recovery and utilization rate of 100%, and recyclable.
3. Intelligent operation and maintenance are convenient, integrating intelligent sensors and wireless communication modules, which can real-time collect gas pressure, temperature, switch status and other parameters, connect to the distribution network automation system, and achieve status maintenance and remote control; The fourth is flexible expansion, adopting a drawer style modular design, which can quickly increase or decrease the output circuit, adapt to industrial load growth and urban network branch line expansion needs, and the initial investment cost is controllable.
Rated current range: 630A-2500A, rated short-circuit breaking current: 16kA-31.5kA, air box protection level IP67, applicable temperature range -30 ℃ to+65 ℃. Supports IEC 61850 communication protocol, seamlessly integrates into intelligent distribution networks, and achieves functions such as fault recording, remote switching, and automatic alarm. Optional vacuum circuit breakers or environmentally friendly gas load switches are available to meet different load types (capacitive, inductive) requirements. The gas box adopts a maintenance free sealed structure with a leakage rate of ≤ 0.08%/year.
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Specification
| Serial No. | Item | PT Module | V Module | |
| Disconnecting Switch | Vacuum Circuit Breaker | Isolation/Earth Switch | ||
| 1 | Rated Voltage | 6 | ||
| 2 | 1min Power Frequency Withstand Voltage | 20/23 | ||
| 3 | Lightning Impulse Withstand Voltage | 40/46 | ||
| 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
When replacing the traditional SF ring main unit, is it necessary to adjust the original distribution architecture?
No need for adjustment, the equipment installation size and interface standards are consistent with traditional SF ring main units, and the electrical parameters are adapted to the domestic 6kV distribution network. It can be directly replaced in situ, greatly reducing the cost of renovation.
What specific operations can intelligent operation and maintenance functions achieve?
It can monitor gas pressure, switch mechanical characteristics, partial discharge and other parameters in real time, remotely realize opening and closing control, fault alarm, data statistical analysis, support mobile APP and computer control, and reduce on-site inspection frequency.
Does the equipment have explosion-proof capability in the chemical industry?
Equipped with an explosion-proof pressure relief structure for the gas box, coupled with a sealed design, it can isolate flammable and explosive gases, avoid the influence of external environment on the equipment, and at the same time, there is no risk of arc leakage, which complies with the explosion-proof safety regulations of the chemical industry.
Related Applications
Distribution network scenario in chemical industrial parks: In response to the special environment of flammable, explosive, and corrosive gases in chemical industrial parks, equipment explosion-proof pressure relief structures can effectively avoid safety risks, and sealed gas boxes can isolate the corrosion of components by corrosive gases. Environmentally friendly gases have no leakage or pollution hazards, meeting the requirements of green and safe production in chemical industrial parks. The intelligent monitoring function can provide real-time feedback on equipment status, predict faults in advance, avoid safety accidents caused by equipment failures, and provide stable power supply for reaction vessels, conveying pumps, environmental treatment equipment, etc.
Urban distribution network branch line scenario: Suitable for the power supply of distribution network branches in old urban areas and newly-built areas, the compact size can be flexibly installed in narrow distribution rooms and roadside box transformers, greatly saving floor space. The environmental attributes are in line with the needs of urban green power grid construction, and the intelligent operation and maintenance function can be integrated into the urban distribution network automation system to achieve rapid fault location and isolation, reduce the scope of power outages and maintenance time, and ensure stable electricity consumption for residents’ daily lives and commercial operations.
Power distribution scenario for building materials factories (cement, ceramics): In response to high temperature, high dust, and high vibration conditions in building materials factories, equipment sealed air boxes can isolate cement dust and ceramic debris, avoiding component blockage or corrosion. Stable short-circuit breaking performance can cope with the power grid impact caused by factory motor start-up and load changes. Low operation and maintenance requirements can reduce the impact of downtime maintenance on production lines. Environmentally friendly gases meet the requirements of environmental protection transformation in the building materials industry, helping enterprises achieve green production.
Photovoltaic/wind power distributed energy grid connection scenario: As the core distribution equipment for distributed energy grid connection, it can adapt to the fluctuating voltage of new energy generation and quickly respond to grid connection needs. Environmentally friendly gases have no greenhouse effect and are in line with the concept of clean energy development. The intelligent monitoring function can provide real-time feedback on the grid connection status, ensuring that the electricity generated by photovoltaic panels and wind turbines is efficiently connected to the distribution network, achieving on-site consumption of clean energy. It is suitable for distributed photovoltaic and mountain wind power projects in industrial parks.
