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NSHBG-17.5
NSHBG-17.5 Environmentally friendly gas-insulated ring main unit
NSHBG-17.5 17.5kV environmentally friendly gas insulated ring main unit is a medium high voltage equipment specially customized for overseas special voltage level power grids and cross-border large-scale projects. It uses a mixture of N ₂ and low GWP fluorinated ether gas (GWP value ≤ 15), integrates international modular design and extreme environmental tolerance technology, and its core components comply with the IEC 62271-203 international standard, and have passed regional special certifications such as AS/NZS in Australia and SASO in the Middle East. The equipment can be customized in terms of voltage frequency, installation structure, and protection level, suitable for overseas large-scale mining areas, agricultural irrigation areas, urban power grid upgrades, and other scenarios, taking into account international compliance, resilience, and cross-border operation and maintenance convenience.
Features
1. Special power grid adaptation, accurately matching overseas 17.5kV exclusive voltage levels, supporting 50Hz/60Hz frequency switching, voltage fluctuation range ± 12%, can seamlessly integrate into local power grid architecture.
2. Resistant to extreme weather conditions, the air box is made of stainless steel material and ceramic composite coating, with a protection level of IP68. It can withstand high temperatures above 45 ℃, strong sand and dust, coastal salt spray, and short-term floods, and is suitable for scenes such as Australian deserts and humid and hot environments in the Middle East.
3. Comprehensive cross-border adaptation, providing multilingual control terminals, localized certification, and customized packaging to meet the stringent requirements of cross-border sea and land transportation.
4. The operation and maintenance costs are controllable, equipped with satellite communication and remote diagnostic modules, and combined with overseas warehouse spare parts reserves. The operation and maintenance response time is ≤ 48 hours, significantly reducing overseas operation and maintenance costs.
Rated current range: 800A-2500A, rated short-circuit breaking current: 25kA-31.5kA, suitable for ambient temperatures ranging from -45 ℃ to+85 ℃, with an average time between failures (MTBF) of ≥ 160000 hours. The air box has undergone seismic testing and passed ISTA 4A transportation certification, and can adapt to the bumps and impacts of cross-border long-distance transportation. Support fault recording, harmonic analysis, and online monitoring of gas pressure, compatible with mainstream overseas intelligent distribution network platform protocols.
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Specification
| Serial No. | Item | PT Module | V Module | |
| Disconnecting Switch | Vacuum Circuit Breaker | Isolation/Earth Switch | ||
| 1 | Rated Voltage | 17.5 | ||
| 2 | 1min Power Frequency Withstand Voltage | 38/45 | ||
| 3 | Lightning Impulse Withstand Voltage | 95/110 | ||
| 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
How is the compatibility of this equipment with overseas 17.5kV power grids guaranteed?
Before leaving the factory, special debugging is carried out according to the target area’s power grid parameters, equipped with adjustable voltage adaptation modules, and local third-party testing reports are provided to ensure seamless compatibility with local transformers, cables, and other equipment.
Is the heat dissipation performance of equipment reliable in high temperature and high humidity environments in the Middle East?
Reliable, optimized air box heat dissipation structure, using efficient heat dissipation fins and natural ventilation design, able to maintain rated operating performance even in a high temperature environment of 85 ℃, without overheating hazards.
What regions are covered by the supply scope of overseas spare parts?
Covering core regions such as Australia, the Middle East, Africa, and South America, with core components (seals, sensors, and operating mechanisms) stored in overseas warehouses. The supply cycle for regular spare parts is ≤ 5 days, and for special spare parts it is ≤ 15 days.
Related Applications
Power distribution scenario in large mining areas in Australia: Suitable for the high temperature and strong sand and dust environment in the desert mining areas of western Australia. The special anti-corrosion coating of the equipment can resist the erosion of mineral dust and high temperature, and the sealed gas box can avoid component wear and failure. The large capacity design can support stable power supply for mining machinery and beneficiation equipment, and the remote operation and maintenance function reduces on-site operation and maintenance personnel configuration. At the same time, the environmentally friendly gas complies with Australia’s strict environmental regulations, avoiding the risk of environmental penalties.
Power distribution scenario in large agricultural irrigation areas in the Middle East: In response to the climate characteristics of high temperature and humidity and frequent rainstorm in the Middle East, IP68 protection grade can withstand short-term flood immersion, and anti condensation design can avoid water vapor affecting insulation performance. To provide power for large-scale water pumps and integrated water and fertilizer systems in irrigation areas, modular design can gradually expand with the expansion of irrigation areas, and low operation and maintenance characteristics can adapt to the local agricultural project operation and maintenance capabilities, supporting large-scale agricultural production.
Southeast Asian urban power grid upgrade scenario: adapted to the 17.5kV distribution network architecture of some Southeast Asian countries, the compact structure can be flexibly installed in narrow urban distribution rooms, and the anti salt spray design can cope with salt spray erosion in coastal cities. The intelligent monitoring function can be connected to the local urban distribution network platform to achieve rapid fault location and isolation, reduce power outage time, and meet the environmental protection requirements of Southeast Asia’s green power grid construction.
Distribution scenarios along African cross-border railways: In response to the inconvenience of transportation and weak operation and maintenance conditions along African cross-border railways, the modular design of equipment facilitates disassembly and on-site assembly, and its wide temperature tolerance can cope with extreme weather conditions along the route. Power supply for railway signal systems, station lighting, and communication equipment, remote diagnostic function can real-time grasp equipment status, reduce inspection costs along the line, and ensure normal railway operation.
