论文部分内容阅读
韶山1型电力机车运用中常常发生主电路“活”接地故障。如牵引电动机母线与车体相磨绝缘破损后,破损处与车体相接时出现接地现象,而母线与车体分离时接地现象消失。又如主变压器或平波电抗器落入金属异物,在机车过道岔或弯道时,由于振动或离心力的作用使异物移位,造成带电体与外壳接通,当外力作用消失,异物位置发生变化,接地现象消失。
Shaoshan 1-type electric locomotive often occur in the main circuit “live” ground fault. Such as traction motor bus and the body phase mill insulation damage, breakage and the body connected to the ground when the phenomenon occurs, while the bus and the body disappears when the grounding phenomenon. Another example is the main transformer or smoothing reactor into the metal foreign body, the locomotive turnout or bend, the vibration or centrifugal force due to the role of foreign matter shift, resulting in charged body and the shell connected, when the external force disappears, foreign body position occurs Variations, grounding disappears.