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Medium-voltage circuit breakers serve as the core equipment for circuit protection in urban and industrial distribution networks. Over the past few decades, traditional SF6 circuit breakers have long been the mainstream choice in the market, thanks to their outstanding and stable arc extinguishing and insulation performance. However, as global carbon neutrality policies grow increasingly rigorous and environmental regulations keep upgrading, the extremely strong greenhouse effect of SF6 gas has become a pressing challenge that the entire power distribution industry must address proactively.
As a brand-new, eco-friendly upgraded product, the SF6 Free Circuit Breaker never uses any fluorine-containing greenhouse gases throughout its lifecycle, while consistently delivering stable and reliable power protection performance. Comparing all key performance indicators of traditional equipment and new eco-friendly alternatives can greatly support engineering teams to select distribution equipment with higher cost-effectiveness and better alignment with environmental policies for smart grid projects.
The most fundamental distinction between the traditional and new circuit breakers lies in their environmental adaptability, which directly determines whether the equipment can meet the long-term construction needs of green power grids.
SF6 is a widely recognized potent greenhouse gas, with a global warming potential thousands of times higher than that of carbon dioxide. Traditional SF6 circuit breakers rely on this gas for operation, which means there is always a risk of gas leakage during long-term service.
Even if the equipment is manufactured with standard sealing processes, a tiny amount of gas will still leak every year, generating continuous carbon emissions throughout the entire service life of the equipment. Due to these hidden environmental issues, traditional equipment is gradually falling behind the development requirements of low-carbon grid transformation.
The Eco‑friendly SF6‑free circuit breaker completely eliminates the use of fluorine-containing insulating gas, eradicating greenhouse gas emissions from the very source. It features zero carbon pollution, no hidden risk of gas leakage, and does not require complex gas recovery and treatment procedures after being decommissioned.
This fully eco-friendly design perfectly fits the construction trend of ecological power grids, and has become the mainstream upgrade solution for new-generation distribution equipment.
The new eco-friendly equipment has achieved environmental upgrades without any compromise on performance. Through structural optimization and material upgrading, modern SF6-free circuit breakers have reached the same level of operational stability as traditional SF6 equipment.
The 12kV SF6 free circuit breaker, which is perfectly suited for conventional urban distribution scenarios, boasts excellent short-circuit breaking and load switching capabilities. Adopting vacuum arc extinguishing technology, it features fast action response and stable breaking performance, fully meeting the daily protection needs of residential communities, commercial parks and urban branch power networks, with its performance completely complying with the industry standards for 12kV medium-voltage power distribution.
The Solid insulation SF6 free circuit breaker uses high-performance solid composite materials to replace the traditional gas insulation structure, greatly enhancing the equipment’s resistance to moisture, dust and condensation.
Even in complex and harsh working conditions such as outdoor and semi-outdoor environments, the equipment can maintain stable insulation performance, and will not suffer from insulation instability caused by air pressure fluctuations like traditional gas-insulated equipment, delivering far superior environmental adaptability.
The maintenance expenses over the full life cycle of equipment directly determine the overall economic benefits of power distribution projects, and SF6-free eco-friendly equipment boasts remarkably prominent advantages in long-term operation costs.
The daily operation and maintenance of traditional SF6 circuit breakers is extremely cumbersome. Our staff need to conduct regular inspections on gas density, calibrate air pressure, and check for potential gas leakage risks.
The aging of equipment seals and changes in ambient temperature will both lead to a drop in internal air pressure, which requires manual gas refilling and regular gas recovery and disposal. Such professional operations not only consume a huge amount of manpower, but also require supporting special testing equipment, which will continuously increase the project’s operation cost in the long run.
SF6‑free medium voltage circuit breaker completely abandon the gas-insulated structure, directly eliminating all gas-related inspection and maintenance work.
For daily patrol inspections, you only need to check the mechanical operation status, the working condition of contacts, and whether the surface insulation is intact. With fewer structural components and a lifetime sealing design, the equipment greatly reduces maintenance frequency and manual intervention, fundamentally saving the overall operation cost.
The two types of circuit breakers have different performances and advantages, and are suitable for different construction scenarios. Only precise type selection can meet the actual needs of the project perfectly.
Secondary SF6 FREE Switchgear is perfectly suitable for newly-built smart communities, green industrial parks, indoor compact substations, as well as power distribution stations in scenic areas with strict environmental control requirements.
Such scenarios generally require low-carbon operation, zero pollution risks, and easy maintenance. The eco-friendly attributes and low-maintenance advantages of gas-free equipment can be maximized here.
Although this equipment is eco-friendly and cost-effective, it is not universally applicable to all scenarios. It has certain performance shortcomings under working conditions of ultra-large load and extremely low temperature.
For super-large industrial substations with extremely high short-circuit current, traditional SF6 equipment still has more prominent advantages in stability. Only by reasonably matching and selecting types based on on-site load working conditions can we ensure the long-term stable operation of the equipment.
Engineering procurement and type selection cannot be judged in a single dimension, and comprehensive consideration of multiple factors is required.
For newly-built green power grids, urban power grid renovation, and indoor small substation projects, SF6 Free Circuit Breaker are recommended for priority selection; for industrial main substations with high load and strict operation standards, it is suggested to use a combination of traditional equipment and eco-friendly equipment to achieve balanced adaptation.
In addition, during procurement, please strictly verify the quality of solid insulating materials, the accuracy of equipment parameters, and the environmental adaptability, to ensure that the procured equipment not only meets the current operation requirements, but also fits in with the long-term low-carbon development plan of the power grid.
Can SF6-free circuit breakers fully replace traditional SF6 circuit breakers in medium-voltage power grids?
They are perfectly compatible with the vast majority of conventional urban and industrial power distribution scenarios. The new-generation equipment with optimized structure boasts stable electrical operation performance, greater environmental friendliness, and lower later maintenance costs. Backed by mature process upgrades and a strict quality control system, XINGJI ensures that this eco-friendly power distribution equipment runs stably and reliably under all kinds of conventional medium-voltage working conditions.
Will the solid insulation structure affect the heat dissipation performance of SF6-free circuit breakers?
It will not cause any negative impact. The equipment adopts high-end composite insulation materials paired with an optimized heat dissipation structure, so heat can be dissipated normally during long-term full-load operation without any heat accumulation or overheating issues, delivering safe and stable heat dissipation performance.
What are the core advantages of 12kV SF6-free equipment in urban power distribution scenarios?
Its biggest highlights are zero greenhouse gas emissions, no need for gas-related maintenance, and a compact equipment structure, which perfectly fit the characteristics of the densely laid urban power grid. It also fully aligns with the policy trend of low-carbon upgrading of power grids, offering extremely strong adaptability.
Compared with traditional SF6 circuit breakers, the new-generation eco-friendly equipment represented by solid-insulation SF6-free circuit breakers and 12kV SF6-free circuit breakers has achieved all-round upgrades in environmental performance, operation and maintenance cost-effectiveness, and scenario adaptability.
It thoroughly addresses the long-standing industry pain points of traditional equipment, including high carbon emissions, cumbersome maintenance, and high usage costs, and is highly consistent with the current green and low-carbon development direction of medium-voltage power grids.
Nowadays, SF6-free medium-voltage circuit breakers and supporting Secondary SF6 FREE Switchgear have become the preferred core equipment for urban power grid renovation and new energy infrastructure projects. If you are looking for a reliable eco-friendly medium-voltage circuit breaker solution and professional project selection guidance, you can fully trust XINGJI. Please feel free to reach out to our team, and we will customize an exclusive low-carbon power distribution solution for your project, along with full-cycle professional technical support.
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