Rmu Ring Main Unit

In an electrical power distribution system a ring main unit rmu is a factory assembled metal enclosed set of switchgear used at the load connection points of a ring type distribution network.

Rmu ring main unit.

The ring main unit rmu is a secondary power distribution equipment. Rmu ring main units sfa rm units are designed to supply reliable energy and protect electrical equipment in secondary distribution networks up to 36 kv. It includes in one unit two switches that can connect the load to either or both main conductors and a fusible switch or circuit breaker and switch that feed a distribution transformer. Advantages of ring main unit.

Our range of ring main units rmus are all suitable for both indoor and outdoor locations and are designed to operate in the most extreme environmental conditions. Both oil and gas insulated ring main units are the result of extensive innovation using advanced technologies and are subjected to extensive testing and safety standards. Ring main unit is a compact gas insulated switchgear cubicle equipped with sf6 switch disconnector and sf6 circuit breakers. Different combinations of these primary switching devices within the unit are commonly used.

You see rmu is considered an all in one solution. It s also safe simple to install and maintenance free switchgear. A ring main unit is no doubt a ground breaking solution. The secondary power distribution equipment refers to the medium voltage switchgear that redistributes the electrical energy of the primary power distribution equipment that receives the high voltage transformer.

It is a complete switchgear in itself. Ring main unit rmu is a compact sealed for life metal enclosed switchgear widely used in urban power distribution network. A complete switchgear means assembly of required switching devices protection device as well as metering device. That makes it a lot simpler to handle the various challenges of electrical distribution.

The below figure shows the rmu with 3 incomers and 1 outgoing feeder to distribution transformer. The primary switching devices can be either switch disconnectors or fused switch disconnectors or circuit breakers. A ring main unit includes a combination of one or more load break switch lbs cum earth switch as incomer and outgoing feeder and vacuum circuit breaker with associated disconnector and earth switch for load feeders.