摘要
阐述了短路电流作用下电器发热分析的已有结果,研究了导体联结面、触头接触面和导体内部三种情况下在通过短路电流时的不同温升规律.指出了热稳定试验时依照I^2t相等的原则,采用延长时间、降低电流进行试验的数学关系是不合理的.
The paper introduces the previous calculation method on temperature rise of electrical apparatus in short circuit current and investig'ated the different temperature rise laws in the cases: conductor body, contact surface and connecting surface between conductors. It pointed out that the heat equivalent principle ft is unreasonable for the test of short-time-withstand current.
出处
《低压电器》
北大核心
1995年第6期28-30,共3页
Low Voltage Apparatus
基金
国家自然科学基金资助项目
关键词
电器
短路电流
发热故障
维修
electrical apparatus, short circuit current, short-time withstand current, temperature rise
