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包修组定修交车时,由于低压试验过程中,调压开关未退回零位,主断路器处于闭合状态,在此种情况下,库外进行高压试验,操纵者未确认调压开关位置,就将受电弓升起,使机车迅速起动。类似以上情况,近一年多期间内,我段共发生过五起,据了解,宝鸡西、兰州西等机务段也均发生过类似情况。其后果都可能造成严重撞车或人身伤亡事故。所以,很有必要对目前的升弓控制电路进行改进。根据上述情况,结合机车控制电路现状,我们认为,可利用TK_0 联锁(4~#空联锁)以及101零压保护延时继电器常开联锁,对升弓电路进行控制。电路原理图如图1所示(具体布线方法从略)。
In the process of low pressure test, the pressure switch does not return to zero and the main circuit breaker is in the closed state. In this case, the high voltage test is carried out outside the warehouse and the operator does not confirm the position of the pressure switch , Will be pantograph raised, so that the locomotive quickly started. Similar to the above, during the past year or more, I have occurred in a total of five, it is understood that, Baoji West, Lanzhou West, and other depot have occurred in a similar situation. The consequences are likely to cause a serious crash or personal injury accident. Therefore, it is necessary to improve the current rise control circuit. According to the above situation, combined with the status of locomotive control circuit, we believe that TK_0 interlock (4 ~ # null interlock) and 101 zero-pressure protection delay relays can be normally open interlock to control the lift bow circuit. Circuit diagram shown in Figure 1 (specific wiring omitted).