Ring Main Distribution System Diagram

The wiring in a house connects all appliances together in parallel.

Ring main distribution system diagram. In the exam you may have to interpret a diagram of the ring main similar to this one. Figure 7 ring main system. In this system the primaries of distribution transformers form a loop. Operation of ring main network.

The feeders in this system form a loop which starts from the substation bus bars runs through the load area feeding distribution transformers and returns to the. 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. A similar level of system reliability to that of the parallel arrangement can be achieved by using ring main feeders. It forms a complete ring and hence the name ring main system.

The loop circuit starts from the substation bus bars makes a loop through the area to be served and returns to the substation. 2 3 2 ring main system. An rmu is a ring main unit a type of switchgear used to connect distribution transformers to an underground secondary distribution 11 kv in the uk cable ring main system. Shows ac ring main system where bcdab is the closed feeder supplied by the sub station s at point b.

In this system the primaries of distribution transformers form a loop. 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. Go back to distribution feeder systems 3. Ring main electrical power distribution system.

This usually results from the growth of load supplied by a parallel feeder where the cabling has been installed along different routes. Ring main distribution system a similar level of system reliability to that of the parallel feeders can be achieved by using ring distribution system here each distribution transformer is fed with two feeders but in different paths. The various distributors are connected to points a c and d of the feeder. 11kv distribution ring main network.

The drawback of a radial electrical power distribution system can be overcome by introducing a ring main electrical power distribution system. The figure shows the circuit diagram of ring main network used for distribution secondary of power to houses and small industries. Ring main connection schemes of distribution system in this system the feeder closes on itself i e. Every consumer has redundant supply in ring main distribution system.

In other words the consumer in the radial electrical distribution system would be in darkness until the feeder or transformer was rectified.