RMU Ring Main Unit

The sf6 ring main unit refers to the ring distribution network, that is, the power supply main line forms a closed ring, and the power supply supplies power to the ring main line, and then distributes power through the high voltage switch from the main line.

The advantage of this is that each distribution branch can take power from its left mains and from its right mains. When the left trunk line fails, it continues to receive power from the right trunk. When the right trunk fails, it continues to receive power from the left trunk.

This way, although the total power is single-powered, However, from each of the distribution branches, it is similar to the benefits of the two-way power supply, thus improving the reliability of the power supply. The so-called “ring main unit” is to set up switchgear (outlet switch cabinet) for each distribution branch.

The busbar of this switchgear is also part of the toroidal trunk. That is to say, the toroidal trunk is composed of the busbars of each outlet cabinet. Each outlet cabinet is called a “ring main unit”. In fact, taking out a ring network cabinet alone does not mean the meaning of “ring network”.