. Electric railway journal . 600-volt overhead line in Vienna, mileslong, includes two figure 8 wires of 80 sq. mm. (aboutNo. 000) cross-section. The 15,000 to 16,500-volt sec-tion also has contact wires of the same rail return to the power house is avoided inorder to minimize disturbances to near-by weak-currentcircuits. The grounding wire, which is of 100 sq. mm.(about No. 0000) section, is carried on insulators overthe poles and therefore serves also for lightning protec-tion. The contact wire alone would assure economicaldistribution, but a feeder of
. Electric railway journal . 600-volt overhead line in Vienna, mileslong, includes two figure 8 wires of 80 sq. mm. (aboutNo. 000) cross-section. The 15,000 to 16,500-volt sec-tion also has contact wires of the same rail return to the power house is avoided inorder to minimize disturbances to near-by weak-currentcircuits. The grounding wire, which is of 100 sq. mm.(about No. 0000) section, is carried on insulators overthe poles and therefore serves also for lightning protec-tion. The contact wire alone would assure economicaldistribution, but a feeder of 50 sq. mm. (about No. 0)section is carried in parallel therewith so that any por-tion of a contact wire can be cut out without killing therest of the division. The catenary system is that of the A. E. G. UnionCompany, in which weights for tension takeup are at-tached to both the catenary and contact wires. Correctalignment is maintained despite the difference in tem-perature coefficients due to the use of steel for the. VIENNA-PRESSBURG RAILWAY—CONSTRUCTION ONTANGENTS VIENNA-PRESSBURG RAILWAY-CURVE CONSTRUCTION 830 ELECTRIC RAILWAY JOURNAL [Vol. XLV, No. 18 catenary and hard-drawn copper for the contact mutual give-and-take of these two wires, as herein-after described, would be impossible with the usual ver-tical hangers. Therefore, diagonal hangers are hangers form the sides of an inverted triangle,whose base is formed by ft. of the catenary andwhose apex is formed by the junction of the diagonalswith the contact wire. The apices are about The hangers are rigidly clamped to the catenary,but flexibly connected to the roller from which the con-tact wire is suspended. In the event of a change in temperature the rollercarrying the contact wire is free to move in an ellipsewhose foci are at the junctions of the diagonals and thecatenary. Owing to the large distance ( ft.) be-tween the junction points or foci, the arc in which the
Size: 1754px × 1425px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
