Abstract
The design of the main tasks is a electrical plant distribution system design. The high voltage 10 kV line was into the mill of the substation. The power was supplied to the workshop, which was transformed to 10 kV through the main transformer and transmitted to the workshop substation, then workshop substation transformed it into 380V. After the basis for the design of the data analysis, found that all workshop equipment are three class load, only a small part of the two class load, and with the nearby chemical plants have a contact line. Through calculating and looking up a lot of relevant information, finally, the main transformers of 5000 kVA was chose. The line of main transformer to workshop is the single-bus line. Various workshops wiring used radiation-Connection. According to calculate current., selected the right equipment ,then checked and drawn up through short-circuit current and voltage loss . Finally the final design was completed and a great map was drawn.
Keywords： the power supply design、load calculation、check short-circuit、current protection
