As factories play more and more important roles in society economic development,,electric energy becomes an important factor to connect difference factories and enterprises. Safety in production and correct utilization of electric energy become the foundation of enterprise development,so sufficient attention should be given to these.
Based on the 10 kV line into plastic products factory for the distribution characteristics of enterprises, on the 10 kV line into plastic products factory enterprises within the main power supply。According to the factory original data, calculate the load. According to the calculation load, select the number of transformers and capacity of substation transformers. According to the total plant load, select plant substation location and the location of the main distribution. Then design two kinds of main electric connection and make technical and economic comparison, study out the draft of the whole plant distribution system. By short-circuit current calculation, select the high-voltage line and the high-voltage distribution equipment (cabinet), setup the relay protection devices, and protract the whole plant distribution system plan. Design the connection and distribution of the factory’s high-voltage power distribution systems.
Keywords: Load calculation; Transformer; Main connection; Relay protection