• 40.5KV ring main unit

      • The high-voltage ring main unit is a kind of switchgear used in the power system, which is mainly used for ring network power supply, radiation power supply and terminal power supply of the distribution network. It is suitable for voltage levels of 10kV and below, and has the characteristics of compact structure, easy operation, safety and reliability.

      Key features:

      1. Modular design: The high-voltage ring main unit usually adopts a modular design, which is easy to expand and maintain.

      2. Compact structure: small size, space-saving, suitable for installation in places with limited space.

      3. High reliability: Adopt high-quality components and advanced design to ensure long-term stable operation of the equipment.

      4. Safety: It has perfect anti-misoperation functions, such as five-proof interlock device, to ensure the safety of operation.

      5. Flexible configuration: Different functional units can be configured according to user needs, such as load switches, fuses, transformers, etc.

      Main components

      1. Bus room: used to connect incoming and outgoing cables, usually located in the upper part of the cabinet.

      2. Switch room: install a load switch or circuit breaker for making or disconnecting the circuit.

      3. Cable room: used for the connection and fixing of incoming and outgoing cables.

      4. Instrument room: installation of measuring instruments, protective devices and control elements.

      5. Operating mechanism: used for manual or electric operation of switchgear.

      Application scenarios

      1. Urban distribution network: ring network power supply and radiant power supply for urban distribution network.

      2. Industrial and mining enterprises: It is used for the power distribution system of industrial and mining enterprises to provide reliable power supply.

      3. Residential quarters: used for the power distribution system of residential quarters to ensure the safety of residents' electricity.

      4. Airports, stations and other public places: used in the power distribution system of public places to ensure the stability of power supply.

      Common types

      1. Air insulated ring main unit: using air as the insulating medium, the structure is simple and the cost is low.

      2. Gas Insulated Ring Main Unit (GIS): SF6 gas is used as the insulating medium, which is smaller in size and suitable for high altitude and harsh environment.

      3. Solid insulated ring main unit: It is made of solid insulating material, which has good environmental protection performance and is suitable for places with high environmental protection requirements.

      Precautions for selection

      1. Voltage level: choose the appropriate voltage level according to the actual needs.

      2. Rated current: Select the appropriate rated current according to the load current.

      3. Short-circuit capacity: Choose the appropriate equipment according to the short-circuit capacity of the system.

      4. Environmental conditions: Consider the climatic conditions of the installation environment, such as temperature, humidity, altitude, etc.

      5. Functional requirements: Select the appropriate function configuration according to the actual needs, such as whether automatic control, remote monitoring, etc. are required.

      The high-voltage ring main unit plays an important role in the power system, and the selection of the right equipment and the correct installation and maintenance can effectively improve the reliability and safety of the power system.



40.5KV ring main unit

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