EXAMINE THIS REPORT ON LINE電腦版下載

Trolleybuses utilize a second parallel overhead line with the return, and two trolley poles, 1 getting in touch with Every overhead wire. (Pantographs are commonly incompatible with parallel overhead lines.) The circuit is done by using both of those wires. Parallel overhead wires are also employed over the unusual railways with a few-section AC ra

(Occasionally the sections are run with diverse voltages or frequencies.) The grids could possibly be synchronised on a traditional foundation, but functions could interrupt synchronisation. This is simply not an issue for DC programs. AC devices have a particular basic safety implication in that the railway electrification process would act as a "