| 摘要 |
Placed near the transition point between power sources of different voltages or frequencies, is a wayside signal producing device which activates an on-board circuit for disconnecting the on-coming vehicle from the power source. When the vehicle has crossed the transition point, another signal producing device causes the vehicle to be connected to the other power source so as to resume power application. When the vehicle is proceeding in the opposite direction the sequence is reversed. In this way a multicar train can have the power source reliably switched in a car-by-car sequence without any appreciable loss in train speed. |
