| 摘要 |
<p>Current collection apparatus 10 for a vehicle with a pantograph, e.g. a trolley bus, is energised by a supply system having overhead current conductors (21-22 or 21-23) carrying current of different energising characteristics (P1, P2 or 0, 02, 03) plus an auxiliary conductor (23 or 24) routed along a vehicle route and is provided with a current collection bar (30) having a number of current collection segments (31 to 33 or 34) electrically insulated from each other and engageable with the overhead conductors without any one segment bridging or short circuiting the overhead conductors. The number of segments is at least equal to the number of overhead conductors including the auxiliary conductor. Bus bars (41, 42) carried on the vehicle are connected to the segments through unidirectional current conducting devices (D1, D2) so as always to receive current of a given polarity (P1, P2) regardless of the energising characteristics of the current (e.g. direct current P1, P2, single phase alternating current 0, 02 or three phase, delta alternating current 0, 02, 03) supplied to the overhead conductors. The arrangement affords at all times a current path between each bus bar and a current conductor so that the vehicle can change paths without lateral displacement of the current collection bar relative to the vehicle.</p> |
