Product Description:
SHAir-12/T630-25 Dry Air Insulated Ring Main Unit is a distribution switching equipment using vacuum interrupter to extinguish the arc, environmentally friendly gas as the main insulating medium, with small amount of solid insulating support, main circuit without any encapsulation, zero gauge pressure or micro positive pressure during the normal operation, and the insulation capacity of phase-to-ground and phase-to-phase meeting the requirements of air insulation under zero gauge pressure.
Environmentally friendly gas insulated metal sealed switching equipment is the most commonly used three phrases ac intelligent gas insulated switchgear, which is also widely used in various electric switching equipment. With the concentration of population, the electric market must be integrated, so the demand for environmentally friendly gas insulated switchgear will increase with the market development. At the same time, this ring main unit RMU combines data acquisition&control, date processing&storage, online monitoring, advanced analysis, etc functions, for on-line intelligent monitoring and management of distribution network, to make the power distribution network run in a safe, reliable, high-quality and efficient state. This ring main unit switchgear realizes the needs of power grid optimization, power safety, power management, energy saving and consumption reduction through remote monitoring, control and management of power system distribution network. It can be widely used in intelligent power distribution fields such as transportation, factories, hospitals, learning, construction, residential quarters and commercial office buildings.
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With so many ring main unit suppliers, how do you find the right one? Beiye Electric is a professional ring main unit Supplier in China, focusing on providing customers with high-quality RMU solutions and professional services.
What Is Ring Main Unit In Electrical
A ring main unit is a specialized switchgear combination used for medium-voltage distribution networks (usually 10kV or 35kV). Ring main unit function: In a ring distribution network, connect, segment, and control the flow of electricity.
Ring Main Unit VS Switchgear
Key point: The ring main unit is not used to disconnect the short-circuit current of the system (which is the work of the higher-level substation circuit breaker). It is primarily responsible for network reconstruction under no current or low current conditions.
Ring Main Unit Components
A typical two-unit SF6 gas-insulated ring main unit cabinet includes the following core components: airtight enclosure, three-position load switch, fuse combination device, operating mechanism, busbar system, bushing/plug interface, pressure gauge/density relay, and control panel.
Ring Main Unit Types
Divided by insulation medium: SF6 gas-insulated ring main unit, environmentally friendly gas-insulated ring main unit, solid-insulated ring main unit, and air-insulated ring main unit.
Divided by structure/function: Compact unit type, multiple functional units share one air box, and standard type.
Ring Main Unit Application
The distribution entrances for important loads such as urban distribution networks, industrial and commercial parks, data centers, hospitals, airports, and rail transit, as well as photovoltaic power stations and wind farms. Distribution centers for large commercial buildings and residential communities.
Air Insulated Ring Main Unit Market
Market driving factors:
Environmental trend: Completely free of SF6 gas, compliant with increasingly stringent global environmental regulations (such as the EU F-Gas regulation), and an important component of the “green grid”.
Cost effectiveness: The structure is relatively simple, and the manufacturing cost is usually lower than that of SF6 gas-insulated ring main units of the same level.
Easy operation and maintenance: Good visibility, no need to handle SF6 gas for maintenance and inspection, and more direct operation.
With environmental requirements becoming a global hard constraint, the market share of air-insulated (and solid insulated) ring main units is rapidly growing, especially in projects that are not sensitive to size but have environmental requirements.
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