关键词 负荷计算 短路电流 保护接地系统
Abstract
The coal mine mine shaft working conditions are complex, the mine pit mine shaft power supply system must guarantee the coal mine can supply power safely, the maintenance mine pit production normal operation, reduces the accident the occurrence.
This article according to the Taoshan three ore characteristics and the production present situation, has made the mine shaft safe power supply system design. According to the method of exploitation, the tunnel arrange the mechanical device which as well as selects, draws up the mine shaft power supply system, definite mine shaft transformer substation distributing point position; According to load computation choice transformer; Chose the electric cable the length, the model and the core section and has carried on the verification; Through computation short-circuit current choice high and low pressure switching gear, installation protective device; Has determined the mine shaft protective earthing system; Has carried on the transformer substation mountain cave room and the arrangement of equipment, and makes the mine shaft power supply the economical computation.
Key word Load computation Short-circuit current Protective earthing system