Abstract
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，The design of assemble distribution system and high pressure distribution system in factories is necessary，This article is about the methods and procedure of substation design and high pressure distribution system design based on original data from factories and knowledge and experience of my own，including the following subjects ： calculation of workshop load; the selection of electric the selection of electric location：the whole plant distribution system developed draft：high voltage line selection：calculation of short circuit current：lightning protection and so on。
Keywords Load，Electric transformer，high voltage line，lightning protection
