论文部分内容阅读
一、引言随着我国采煤机械化程度的不断提高,国产釆煤机电机功率以及采区总用电负荷不断增长,因而我国原有采区供电电压(660V及以下)已不能满足要求,原有防爆电气设备的技术状况也越来越与采煤工业的发展不相适应。为此为了配合煤矿井下采区综合机械化的发展。从1972年底开始,原燃化部和一机部有关方面做了一系列的准备工作后,确定1140V 为我国煤矿井下釆区供电的试验
I. INTRODUCTION With the continuous improvement of coal mining mechanization in our country, the power of Chinese-made coal washing machine and the total electricity load in mining area keep growing. Therefore, the supply voltage (660V and below) of the original mining area in our country can no longer meet the requirements. The technical status of explosion-proof electrical equipment is also increasingly incompatible with the development of coal mining industry. To this end in order to meet the coal mining area comprehensive mechanization development. Since the end of 1972, a series of preparatory work has been carried out by the former Ministry of Combustion and the relevant departments of a machine department to determine the 1140V test for supplying electricity to the precincts of coal mines in China