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ＦＬ回路即主发机励磁回路 ,是ＤＦ4 型机车电线路检测的第 11回路。这条回路的检测是判断ＤＦ4 型机车主发励磁状态的依据。其好坏与否 ,将直接影响着ＤＦ4 型机车的正常运行。ＦＬ回路的检测门限值为 1 0Ω ,其检测点为5 77#线与 5 78#线。在现场检测工作中 ,一般采点在ＬＣ
FL loop that is the main engine excitation circuit, DF4 locomotive is the 11th circuit detection circuit. This circuit is to determine the detection of DF4 locomotive main excitation based on the state. Its good or bad, will directly affect the normal operation of DF4 locomotive. FL loop detection threshold is 1 0 Ω, the detection point for the 5 77 # line and 5 78 # line. In the field of testing, the general point of LC