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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. 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 ...
A diagram of a hierarchical communications network. Feeder lines (in red) provide communication with important nodes. A feeder line is a peripheral route or branch in a network, which connects smaller or more remote nodes with a route or branch carrying heavier traffic. The term is applicable to any system based on a hierarchical network.
A house cable connection cabinet equipped with a meter, a time switch and a circuit breaker. Electric power distribution systems are designed to serve their customers with reliable and high-quality power. The most common distribution system consists of simple radial circuits (feeders) that can be overhead, underground, or a combination.
In large cities, many electric utility companies use grid feeders to make interconnected distribution networks to serve the downtown core. The interconnected network has multiple connections to the points of supply. Some of New York City's downtown areas are powered by submersible network transformers of 500 to 2,500 kVA.
Electric power distribution is the final stage in the delivery of electricity. Electricity is carried from the transmission system to individual consumers. Distribution substations connect to the transmission system and lower the transmission voltage to medium voltage ranging between 2 kV and 33 kV with the use of transformers. [1]
In electricity supply design, a ring circuit is an electrical wiring technique in which sockets and the distribution point are connected in a ring. It is contrasted with the usual radial circuit, in which sockets and the distribution point are connected in a line with the distribution point at one end.
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The PDC housing contains a transformer, which steps down the incoming power to a lower voltage to feed other plant loads such as motor control centers (MCC's). Feeder breakers for these loads will be located on the PDC. PDC's will often contain additional protective relays, monitoring equipment, fuses, terminal points, etc...