Y,YE型“防触电”配电变压器的研究与探讨

Study and Discussion on Distribution Transformer of Y,YE Type “Anti-electric Shock”

目前配电电力变压器均使用三相四线制低压供电方式,由于民用照明用电使用其中的一线一地单相供电,常常会引起人身触电和设备烧毁事故的发生。本文介绍了一种Y,YE型防触电变压器,该型变压器的二次侧内部结构采用双卷芯双绕组,将380V三相动力与220V单相照明分开,各自一组绕组,互不连接,380V三相动力绕组采用Y型接线,中性点不接地,220V照明采用E型接线,中性点经电阻接地。从而该变压器从根本上解决了人员触电和零线中断后,发生某相电压升高烧毁用户电器的事故。

Now distribution power transformer uses three-phase and 4 lines system in low voltage power supply,since power supply in civil illumination uses single-phase and one line,it is often caused electric shock of person and accident of equipment to burn out. This paper introduced a kind of Y,YE anti-electric shock transformer. The internal structure in twice side of this transformer adopts two windings with two roll core,which makes 380 V three-phase power supply and 220 V single-phase illumination separated, and no wiring in two windings. The three-phase power winding of 380 V adopts the Y wiring without neutral point grounding,tbe illumination winding of 220 V adopts the E wiring with neutral point grounding through resistance. The problem of electric shock of person and accident of eauipment to burn out can be solved when this kind of transformer is used.