24KV Electrical Ring Main Unit (RMU)

Features of 24KV Electrical RMU

There are 3 types of electrical Rmu switchgear according to the isolation medium:

Gas insulation with SF6, air insulation, and solid insulation.

All of these ring main units are used to divide the load current, switch short circuit current and transformer no-load current, a certain distance from the overhead line, the charging current of the current line, and play the role of control and protection.

Electric Ring main unit(rmu) is an important switch equipment for the secondary distribution system. It could be standard configurations and produced in big quantity and also could be extendable according to customer’s requirements.

Because of the advantages of the sealed tanker with SF6 gas, the electrical ring main unit could operate in normal condition for around 30 years without any maintenance.

The ring main unit is a switchgear (outlet switchgear) for each distribution branch. The busbar of this unit is also part of the ring trunk.

The ring network refers to a ring distribution network, in which the power supply trunk forms a closed ring, and the power supply supplies power to the ring trunk line and then distributes power from the trunk line all the way through the high voltage switch.

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

When the right main line fails, it continues to receive power from the left mainline. This way, although the main power supply is single-circuit powered, However, similar to the two-way power supply, benefits are gained from each distribution branch, which improves the reliability of the power supply.