大德汇成科技厦门有限公司

Westinghouse,A201K1BA

价格:5632 2019-12-10 02:34:02 95次浏览

正确选用控制元件的品种、规格是提高元件使用可靠性的关键。为此必须深入确切地了解和分析机床对电气控制系统的要求和系统对控制元件的要求。并且收集和消化控制元件制造厂提供的技术材料,如果这些资料不能满足选用的要求时,机床制造厂可按实际使用的条件对控制元件进行试验以确定是否合用。由于选用不当影响可靠性的例子有:忽视输入或输出的机械参数,例如选电磁铁时未考虑所拖负载的力――行程特性,选限位开关时未考虑撞块速度;选接触器时未考虑点动、反接制动的工作方式;选继电器时未考虑能做到可靠接触的额定工作电压和额定最小工作电流;选短路保护电器(包括熔断器)时未考虑对接触器等触头的保护;选控制变压器时未考虑漏阻抗在电磁系统起动电流情况下的压降等。

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