对称电压 meaning in English

symmetric voltage

Impedance - matching balanced traction transformers ( balanced transformers in this paper for short ) are step - down transformers , they transfer symmetrical three phase voltage in primary side to perpendicular two phase voltage in secondary side . they are different from any other transformers , so their short - circuit current analysis and short - circuit test method must be taken into special account
阻抗匹配平衡牵引变压器(本文中简称平衡变压器)是一种将一次侧三相对称电压变换为二次侧二相垂直电压的降压变压器，它不同于已有的任何一种变压器，短路电流的分析计算和短路试验必须予以重新研究。