电力机车主变压器次边保护电路电阻过热故障及改进设计

Fault of Resistance Overheating and Improvement Design of Secondary Protection Circuit for Power Machine Owner Transformer

针对SS4G型电力机车的变压器次边RC吸收电路在运行中由于热功率大、散热性能不佳经常发生过热烧损故障这一情况,通过分析电路组成,找出电阻烧损的原因,并提出了相应的改进设计方案,实践应用效果理想.

For the secondary side RC absorption circuit of SS4G electric locomotive,the overheating failure often occurs in operation because of the high thermal power and poor heat dissipation perform ance.By analyzing the circuit composition,the reason of resistance burning is found out,and the corresponding improved design scheme is put forward.The practical application effect is ideal.