| 摘要 |
PURPOSE:To reduce the manhours in wiring with the wires made thinner and the number of wires decreased by loop-wiring the three points, i.e. the output terminal of a main rectifier, an end of an electric control resistor and an end of a main smoothing reactor. CONSTITUTION:In power running of an electric rolling stock, a lever 23 of a changeover switch 18 is connected to a contact 24. As a result, one of the current flows from an electrode 2 of a main rectification circuit 1 runs down in a wiring 5 in the direction of an arrow A and gets directly to a smoothing reactor 3. The other current flow runs down in wirings 9 and 8 in the direction of an arrow B and gets to a terminal 4 through a terminal 7 of an electric control resistor 6. In the electric control of the electric rolling stock on the other hand, the lever 23 of the changeover switch 18 is connected to a contact 25. As a result, one of the current flows from the main smoothing reactor 3 in the reverse direction runs down in the wirings 5 and 9 in sequence in the direction of arrows E and B to get to the terminal 7 of the electric control resistor 6, while the other flows in the wiring 4 in the direction of an arrow D to get to the terminal 7 of the electric control resistor 6, in which the current flows in the direction of C. In this way, the wirings 5, 8 and 9 can be made thinner and the number of wires reduced. |
