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Power Distribution is a system, consisting of a Main Distribution Board (MDB), Sub Main Distribution Boards (SMDBs) and Final Distribution Boards (FDB), by which the electrical energy is transmitted via branches to reach the exact end user,
MDB An MDB is a panel or enclosure that houses the fuses, circuit breakers and ground leakage protection units where the electrical energy, which is used to distribute electrical power to numerous individual circuits or consumer points, is taken in from the transformer or an upstream panel. An MDB typically has a single or multiple incoming power sources and includes main circuit breakers and residual current or earth leakage protection devices. A MDB is comprised of a free-standing enclosure, a bus bar system, MCCB's, metering and support equipment's and required current transformers. Panels are assembled in a systematic manner such as incomer section and outgoing section and maximum current rated up to 6000A,
SMDB which is feed by MDB which is installed generally at the point where a large distribution cable terminates, and several smaller sub-circuits start. These are the switchboards that although similar construction, are larger than a final distribution board circuit. The boards are installed midway through the power distribution system, at the point in a large distribution cable end, and several smaller starting sub-circuits maximum current rated up to 1250A,
FDB Final Distribution Board is feed by a Sub-Main Distribution Boards, which then feeds electrical energy to the end user with Current rating up to 250A.
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