Ring Main Unit Drawing

The main purpose of a spur is adding an extra socket on to an existing ring main circuit.

Ring main unit drawing. Its simplicity makes it a great arrangement for that use. 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. A ring main unit is a piece of switchgear used on high voltage distribution ring main systems e g. They are not so common in the uk but are used extensively abroad as the ring main or final ring circuit does have it s drawbacks.

A very fantastic ring main unit rmu presentation by us. Hey i am tony wang. Wiring a socket correctly in a final ring circuit or ring main. The primary switching devices can be either switch disconnectors or fused switch disconnectors or circuit breakers.

It is a ring system where one line is interrupted or fails the other will work. The ring is fed from a fuse or circuit breaker in the consumer unit. Ring circuits are commonly used in british wiring with socket outlets taking fused plugs to bs 1363 because the breaker rating is much higher than that of any. We will always be behind you and good cooperative partner in china.

A ring main unit rmu is a totally sealed gas insulated compact switchgear unit. An example of this is an 11kv or above. The ring starts at the consumer unit also known as fuse box distribution board or breaker box visits each socket in turn and then returns to the consumer unit. A ring main unit rmu is a totally sealed gas insulated compact switchgear unit.

Design and protection for ring main circuits. Ring main unit is utilized in a substation in a high voltage distribution. Essentially it s three switches incorporated into one device used to. In the uk at 11 kv.

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. As you can see it eliminates the need to wire a socket all the way back to the a consumer unit but the nearest ring main socket is used instead. The other type of circuit used to power your home is a radial circuit.