Regarding the appearance of the first ring network storage cabinet, it is a storage cabinet and usually appears in large residential areas, shopping malls, and near large power companies. The function of the ring network box is to connect the ring network lines and improve their power supply reliability, such as closing the ring network lines or cutting off the ring network load. In short, when a certain line malfunctions or undergoes maintenance or repair, the remaining lines in the ring network cabinet can be used for transmission, greatly improving the stability and reliability of power transmission and distribution. What are the advantages of ring network cabinets?
What is the working principle of a ring network cabinet?
The principle is to achieve mutual supply of lines, that is, after different lines leave the station, they hold hands with each other, and under normal circumstances, the connection is interrupted and each operates separately. However, once a certain substation loses power, a ring network cabinet can be used to cut off the lines of the substation that has lost power, merge the connections together, and connect another substation to the load that should be connected to the substation that has lost power.
If the load of a certain line or substation is too high, while the load of another line or substation is too low, it can be selectively disconnected from a certain contact point, and the lower load line or substation can share a portion of the load, ensuring both the reliability of power supply and the stability of the power grid.
How to select a ring network cabinet.
When selecting a ring network cabinet, first determine the voltage level. Then calculate the current based on the voltage level and equipment capacity; Thirdly, based on the actual operating environment and considering the number of inputs, outputs, and feedbacks for the ring main unit, it is necessary to use a multi sided ring main unit. The fourth is to consider whether to configure transformers, whether to configure comprehensive protection, whether anti condensation measures are needed, and whether auxiliary functions such as automatic networking are needed. Fifth, based on the project budget funds and civil engineering area, choose a suitable ring network cabinet. Under the same conditions, generally air insulated cabinets are cheap, but they have a large volume and a large floor area; The SF6 fully insulated ring network cabinet is slightly expensive, but it is small in size, occupies a small area, and is easy to install; Solid insulation cabinet and environmentally friendly gas insulation cabinet have high prices, small size, small footprint, convenient installation, and higher environmental protection level.
