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NSHBG-20
NSHBG-20 Environmentally friendly gas-insulated ring main unit
NSHBG-20 20kV environmentally friendly gas insulated ring main unit is a medium high voltage equipment designed for industrial heavy-duty, port hub and other scenarios. It uses a mixture of dry air and inert gas medium (GWP value=1), integrates heavy-duty circuit breakers, anti condensation modules, intelligent load control units, and the gas box adopts a reinforced steel structure, with excellent impact resistance and overload resistance performance. The equipment complies with the dual standards of GB/T 11022 and IEC 62271, and is optimized for the frequent start stop and high load impact characteristics of industrial heavy-duty scenarios. It is suitable for heavy-duty machinery manufacturing, port heavy-duty loading and unloading, metallurgical blast furnaces, and other scenarios, taking into account green environmental protection and heavy-duty power supply reliability.
Features
1. Strong adaptability to heavy loads, optimized arc extinguishing chamber structure and operating mechanism, able to withstand frequent start stop (≥ 10000 times without faults), fast response speed for short circuit breaking, and can effectively cope with the current impact of heavy load equipment.
2. Extremely environmentally friendly, using dry air mixed with inert gases, no greenhouse effect, non-toxic, can naturally diffuse after leakage, no need for recycling, fully in line with the “dual carbon” policy.
3. Excellent protection performance, with an air box protection level of IP67, adopting anti condensation, anti-corrosion, and anti vibration design, capable of withstanding complex working conditions such as dust, oil pollution, and vibration in industrial workshops.
4. Intelligent load regulation, equipped with intelligent load regulation module, can monitor load changes in real time, automatically adjust power supply parameters, avoid overload and voltage fluctuations, and ensure stable operation of heavy-duty equipment.
Rated current range: 1600A-4000A, rated short-circuit breaking current: 31.5kA-50kA, applicable ambient temperature -35 ℃ to+75 ℃, air leakage rate ≤ 0.07%/year, gas box service life ≥ 25 years. Supports manual, electric, and remote operation modes, compatible with DL/T 634.5.1-2002 and IEC 61850 dual protocols, and can be connected to industrial control systems and distribution automation platforms. Adopting oil-free design, operating noise ≤ 60 decibels, suitable for industrial workshop environment.
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Specification
| Serial No. | Item | PT Module | V Module | |
| Disconnecting Switch | Vacuum Circuit Breaker | Isolation/Earth Switch | ||
| 1 | Rated Voltage | 20 | ||
| 2 | 1min Power Frequency Withstand Voltage | 50/60 | ||
| 3 | Lightning Impulse Withstand Voltage | 125/145 | ||
| 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
What is the maximum start stop frequency that the device can withstand?
Under normal operating conditions, it can withstand ≥ 10000 times of fault free opening and closing, far exceeding the daily start and stop requirements of industrial heavy-duty equipment, and there is no significant voltage fluctuation during the start and stop process, which will not affect the operation of other equipment.
Is the insulation performance of dry air mixed media affected in low-temperature environments?
Unaffected, by optimizing the gas ratio and insulation design of the gas box, the insulation strength remains at the rated level under -35 ℃ low temperature environment, suitable for winter low temperature working conditions in northern industrial plants.
What specific operations can the intelligent load regulation function achieve?
Real time monitoring of load current, voltage, power factor and other parameters, automatic disconnection of overload circuit, adjustment of voltage deviation, and support for load priority setting to ensure the power supply priority of core overloaded equipment.
Related Applications
Power distribution scenario in heavy machinery manufacturing workshop: For heavy-duty equipment such as CNC machine tools, stamping machines, and cranes, the equipment can withstand frequent start stop and current surge, and provide stable 20kV high-voltage power supply. The sealed gas box can isolate metal debris, oil stains, and dust in the workshop, avoiding component failures that affect production. Intelligent load control can prevent overload tripping, ensuring continuous operation of the production line. At the same time, the environmentally friendly medium meets the requirements of the factory’s green production transformation.
Port heavy-duty loading and unloading power distribution scenario: adapted to the power supply needs of port container cranes, gantry cranes and other heavy-duty equipment, anti vibration design can cope with mechanical vibrations generated during loading and unloading operations, and anti salt spray coating can resist salt spray erosion in coastal ports. The fast arc extinguishing performance can cope with the current impact generated by equipment start stop, and the remote control function is convenient for centralized operation and maintenance in the port, ensuring efficient loading and unloading operations. At the same time, the environmental protection properties meet the green operation standards of the port.
Metallurgical blast furnace supporting power distribution scenario: To cope with the working conditions of high temperature, high dust, and large vibration in metallurgical blast furnaces, the strengthened steel gas box of the equipment can resist high temperature radiation and mechanical impact, and the sealing structure can isolate blast furnace dust and oil pollution. The large capacity design can support stable power supply for core auxiliary equipment such as blast furnace blowers and water pumps. Intelligent load regulation can avoid load fluctuations that affect blast furnace operation, ensuring the continuity of metallurgical production, and at the same time, there is no hidden danger of environmental gas leakage and pollution.
Large scale cold chain logistics park power distribution scenario: adapted to the continuous operation needs of heavy-duty loads such as compressors and refrigeration equipment in cold chain logistics parks, anti condensation design can cope with the high humidity environment of cold chain warehouses and avoid the impact of water vapor condensation on insulation performance. The stable power supply performance can ensure the uninterrupted operation of refrigeration equipment, prevent the deterioration of goods, and the intelligent monitoring function can remotely troubleshoot faults, reducing interference with the operation of logistics parks. At the same time, the environmental attributes help logistics parks apply for green parks.
