Rmu 11kv Ring Main Unit Circuit Diagram

17 5 kv 2 ring switches up to 630 a 1 vacuum circuit breaker up to 630a.

Rmu 11kv ring main unit circuit diagram. Ring main unit circuit diagram. These units allow the connection of transformers through under ground cables and also provide protection to the transformers. 17 5 kv 2 ring switches up to 630a 1 vacuum circuit breaker up to 630a. 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.

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. 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. Indoor and outdoor installation. The ring switches are fault make load break enclosed.

Front view and single line diagram figure 2. The incomer feeder is either vacuum circuit breaker or sf 6 circuit breaker with associated disconnect switch and earth switch. This incomer feeder is given with the provision of bushing protruding from the enclosure of rmu for supply cable connection. Front view and single line diagram efi 21ka 17 5 kv 400a ct.

It is a ring system where one line is interrupted or fails the other will work. 11kv ring main distribution network scientific diagram. 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 units 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.

The units are locally manufactured and assembled in production facilities in united arab emirates. Sbs 3 way compact indoor type rmu sbs 3 way compact outdoor type rmu figure 1. 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. Ring main unit rmu is a compact sealed for life metal enclosed switchgear widely used in urban power distribution network.

Ring main unit is utilized in a substation in a high voltage distribution. Advantages of ring main units. Ring main units are available in different voltage ratings ranging from 11kv to 33kv.