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ABSTRACT
As we all know ,Factory power supply system of the power system is the
redistribution of power step-down power to the various factories or workshops, and its step-down transformer from the factory, high-voltage power distribution lines,substation plant, low-voltage distribution lines and electrical equipment composition. The total step-down substation plant and distribution system design is based on the various workshops the number and nature of the load, the production process on the load requirements as well as load distribution, combined with the national power supply situation.
Therefore, in order to achieve the factory for the efficient and rational distribution, the load must be based on the number and nature of the workshop, and taking into account the operation and maintenance of electrical equipment and production process on the load requirements, the load calculation of statistics and short-circuit current, and So select the high and low end equipment, transmission line model, complete the simple design of lightning protection measures to address the safety and reliability of various departments, the problem of economic distribution of power.
KEY WORDS: step-down, power, load, short-circuit, electrical equipment
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