AC DISTRIBUTION SYSTEM PRIMARY DISTRIBUTION

Where should the primary power distribution box be connected during construction

Where should the primary power distribution box be connected during construction

The main distribution box shall be located in the area close to the power supply; the distribution box shall be installed in the area with relatively concentrated electrical equipment or load; the distance between the distribution box and the switch box shall not exceed. Many feeders leave substation in a concrete ducts and are routed to a nearby pole. The distribution box shall be set below the main distribution box, and the switch box shall be set below the distribution box, and the. It has three categories: residential, commercial and industrial electrical distribution boxes, all of which play important roles in their respective electrical.

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Protection distance of primary distribution box

Protection distance of primary distribution box

The horizontal distance between switchbox and fixed electrical equipment should not exceed 3m. Such protection relays are known as "distance protection relays" and only function in case of faults that occur between the location of the protection relay and the chosen reach point. The aim of this technical article is to cover the most important principles of four fundamental relay protections: overcurrent, directional overcurrent, distance and differential for transmission lines, power transformers and busbars. Distance relay R1 has to provide primary protection to line AB and back up protection to lines BC, BD and BE.

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