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东风4型内燃机车的接地保护电路是机车的重要电路。若运行中主回路接地处理不当,将会造成机车途停。正确了解东风4型内燃机车接地开关使用的原理和掌握应急处理的方法,对减少“机破”有着明显的作用。(一)接地开关的使用原理东风4型内燃机车主发电机定子为Y形联接,在正常工况下为三相对称负载。因此,绕组Y形联线中点0的电位取为参考零电位。接
Dongfeng 4 diesel locomotive grounding protection circuit is an important circuit of the locomotive. If the operation of the main loop grounding improper handling, will result in locomotive stop. A correct understanding of the principle of using the earthing switch of DF4 diesel locomotive and the method of handling emergency response have a significant effect on reducing the “broken machine”. (A) the use of grounding switch principle Dongfeng 4 diesel generator main generator stator Y-shaped connection, under normal conditions for three-phase symmetrical load. Therefore, the winding Y-line midpoint zero potential as a reference zero potential. Pick up