What characteristics does the solid insulation ring main unit have that enables it to maintain power supply continuity during natural disasters?
Publish Time: 2025-06-23
In the face of natural disasters such as extreme weather, earthquakes, and floods, the stable operation of the power system is crucial. As an environmentally friendly distribution network equipment independently developed by Zhuhai Wharton Electric, the solid insulation ring main unit has demonstrated strong adaptability and reliability in harsh environments with its unique design and excellent performance, becoming a key device to ensure the continuity of power supply after disasters.
The solid insulation ring main unit adopts a three-phase split fully insulated and fully sealed structure design. All electrical and mechanical parts are encapsulated in a solid metal shell to form a complete closed system. This design not only improves the overall strength of the equipment, but also effectively shields the impact of the external environment on the internal components. Even in heavy rain, floods, high humidity or dusty environments, it can ensure the normal operation of internal components to avoid short circuits or failures caused by water vapor penetration or dust accumulation.
In addition, the product protection level meets the IP67 standard, which means that it can remain functional even when immersed in water for a short time, greatly enhancing its ability to survive natural disasters.
2. SF6-free design improves stability in extreme climates
Traditional ring main units rely on SF6 gas as an insulating medium, but in low-temperature environments, SF6 gas is easily liquefied, resulting in reduced insulation performance and even equipment failure. The solid insulation ring main unit of Wharton Electric completely abandons SF6 gas and adopts all-solid insulation materials, which fundamentally eliminates the safety hazards caused by temperature changes.
This feature is particularly important in extremely cold areas, plateau areas or sudden extreme weather, allowing the equipment to maintain stable insulation performance under various climatic conditions, thereby ensuring the continuous operation of the power system.
3. Modular and phase-split design to enhance flexibility and risk resistance
The solid insulation ring main unit adopts a phase-split modular design, with each phase operating independently without interfering with each other. When a phase fails, it will not affect the normal operation of other phases, significantly improving the stability and fault tolerance of the overall system.
This design also facilitates rapid maintenance and replacement of components, reducing the risk of large-scale power outages due to single-point failures, and is particularly suitable for post-disaster emergency repair scenarios.
4. Excellent electrical insulation performance to ensure long-term safe operation
The insulation system of the product has been carefully optimized, taking into full consideration the uniform distribution of the primary components and the overall electric field distribution. At the same time, the grounding layer is fully coated on the outer surface of the insulating components to control the partial discharge of the components to ≤1pC and the partial discharge of the whole cabinet to ≤10pC. This greatly reduces the insulation aging problem caused by partial discharge, prolongs the service life of the equipment, and maintains good safety under complex working conditions such as high voltage and high current.
This advantage is particularly important for the power grid to withstand overload operation and voltage fluctuations during disasters, and can effectively prevent equipment from being damaged due to overload or electric field concentration.
5. Small size, flexible installation, suitable for a variety of emergency scenarios
The solid insulation ring main unit adopts a compact design, small size, light weight, easy to transport and quick deployment. Whether in the city center, mountainous area, island or post-disaster reconstruction area, it can be flexibly installed and used. Its maintenance-free characteristics also reduce the need for daily operation and maintenance, which is particularly practical in the case of tight human resources after the disaster.
6. Practical application verification: reliable performance in natural disasters
In recent years, the distribution system using solid insulation ring main unit has performed well in many typhoons, rainstorms, earthquakes and other disasters. In most cases, power supply is restored immediately after the disaster, becoming an important support for disaster rescue and life recovery. Especially in coastal and southern rainy areas, its waterproof, moisture-proof and corrosion-resistant capabilities have been widely recognized.
The solid insulation ring main unit independently developed by Zhuhai Wharton Electric has demonstrated excellent power supply guarantee capabilities in responding to natural disasters with its fully sealed structure, IP67 protection level, SF6 gas-free design, modular layout, excellent insulation performance and maintenance-free characteristics. It not only meets the needs of modern power grids for environmental protection, safety and intelligence, but also provides a solid guarantee for the stable operation of the power system in extreme environments and emergency situations.
