Rmu 11kv Ring Main Unit Circuit Diagram

Ring main units are available in different voltage ratings ranging from 11kv to 33kv.

Rmu 11kv ring main unit circuit diagram.

These units allow the connection of transformers through under ground cables and also provide protection to the transformers. Ring main unit circuit diagram. 17 5 kv 2 ring switches up to 630a 1 vacuum circuit breaker up to 630a. The major advantage of ring main units is the safety they provide to the operators.

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. Ring main distribution with rmu power unit as an important part of circuit breaker introduction it is the manufacturers and function does a serve cur interruption technologies. 11kv ring main distribution network scientific diagram. Indoor and outdoor installation.

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. Ring main unit is utilized in a substation in a high voltage distribution. It is a ring system where one line is interrupted or fails the other will work. An example of this is an 11kv or above.

Technical specification for 22 and 11 kv ring main unit switchgear table of contents 1 0 scope 2 0 general 3 0 standards 4 0 the standards mentioned above are available from 5 0 climate conditions 6 0 rmu outdoor metal clad 7 0 take off terminal units for future automation 8 0 isolator load break type. The incomer feeder is either vacuum circuit breaker or sf 6 circuit breaker with associated disconnect switch and earth switch. Front view and single line diagram figure 2. The ring switches are fault make load break enclosed.

17 5 kv 2 ring switches up to 630 a 1 vacuum circuit breaker up to 630a. This incomer feeder is given with the provision of bushing protruding from the enclosure of rmu for supply cable connection. Ring main unit rmu is a compact sealed for life metal enclosed switchgear widely used in urban power distribution network. Advantages of ring main units.

This model is the principal unit in which two ring switches and a tee off circuit breaker accompanied by a disconnector switch are contained in a common tank. The units are locally manufactured and assembled in production facilities in united arab emirates. Front view and single line diagram efi 21ka 17 5 kv 400a ct.