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韶山3型电力机车自在石家庄和月山机务段投入运行以来,出现过被乘务员称之为“窜车”的故障。这种故障常出现在乘务员没有动车思想准备情况下,因此,给安全行车带来很大危险。引起该故障有多方面原因,其中有控制电子柜方面原因。为了确保安全行车,有必要对控制电子柜加装“窜车”故障监视和保护装置。一、故障原因当乘务员将司机控制器手柄置升位起点,调压开关从0位进到1级时,虽然没有给出电流指令,但牵引电动机却出现了不受控电流。该电流引起机车突然向前冲去。按理在控制电子柜电流调节器没有输出控制电压值(U_(631)为0)时,不应有脉冲输出,但由
Since Shaoshan 3 electric locomotive was put into operation in Shijiazhuang and Yueshan Locomotive Depot, there was a fault called “channeling” by flight attendants. This failure often occurs in the case of flight attendants without motorists ideological preparation, therefore, to the safety of driving a great danger. There are many reasons for the failure, including the reason for controlling the electronic cabinet. In order to ensure safe driving, it is necessary to install a “channeling” fault monitoring and protection device on the control electronics cabinet. First, the cause of the malfunction when the flight attendant driver controller handle set up a starting point, the pressure switch from 0 to 1, although not given the current command, but the traction motor has appeared uncontrolled current. The current caused the locomotive suddenly rushed forward. Reasoning in the control cabinet electronic current regulator output voltage (U_ (631) is 0), there should be no pulse output, but by