三相交流电路非同期短路时电动力的计算

本文计算了三相交流电路非同期短路时作用在水平布置的三相载流导体上的电动力,计算表明,在最严重的情况下,作用在左边,中间和右边各相导体上最大电动力的方向分别为向左、向左和向右,而最大电动力的数值分别为三相同期短路时的1.2,1.4和1.4倍,为此,作者建议,在设计高压电器时,应按非同期短路时的情况来考虑其电动稳定性,

The Calculation of Electrodynamic Forces Caused by Non-simultaneous Short-Circuit in Three Phase A. C. Circuit

Electrodynamic forces in case of non-simultaneous short-circuit in three phase A.C. circuit, which acts on three phase carrying-current condutor in horizontal arrange , was calculated in this paper. It shows that, in the severest condition , the direction of maximum electro-dynamic forces, which acts on left, middle and right conductor, severally is leftward, leftward and rightward, and the maximum of them severally is 1.2, 1.4andl.4 times of the maximum in case of three phase simultaneous short-circuit. From this, it is proposed the peak withstand current of high voltage switchgear should be equal to peak current in case of non-simultaneo-usshort-circuit in three phase A.C. circuit.