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In particular, the Gotthard Base Tunnel (opened on 1 June 2016) uses 15 kV, 16.7 Hz electrification. Due to high conversion costs, it is unlikely that existing 15 kV, 16.7 Hz systems will be converted to 25 kV, 50 Hz despite the fact that this would reduce the weight of the on-board step-down transformers to one third that of the present devices.
Controls for the reclosers range from the original electromechanical systems to digital electronics with metering and SCADA functions. The ratings of reclosers run from 2.4–38 kV for load currents from 10–1200 A and fault currents from 1–16 kA. [7] [8] On a 3-phase circuit, a recloser is more beneficial than three separate fuse cutouts.
Map of the high voltage power grid used for power supply of electric railways in Germany, Switzerland and Austria. Germany, Austria and Switzerland operate the largest interconnected 15 kV 16.7 Hz system, which has central generation, a special transmission network, central and decentral converter plants.
Electric locomotives capable of operating on the 15 kV 16.7 Hz AC OHL system. Pages in category "15 kV AC locomotives" The following 102 pages are in this category, out of 102 total.
A 115 kV to 41.6/12.47 kV 5 MVA 60 Hz substation with circuit switcher, regulators, reclosers and control building at Warren, Minnesota. It shows elements of low-profile construction, with apparatus mounted on individual columns. A substation is a part of an electrical generation, transmission, and distribution system.
A typical one-line diagram with annotated power flows. Red boxes represent circuit breakers, grey lines represent three-phase bus and interconnecting conductors, the orange circle represents an electric generator, the green spiral is an inductor, and the three overlapping blue circles represent a double-wound transformer with a tertiary winding.
Again from those who actually have 15 kV / 16.7 Hz or 16 2/3 Hz, nobody is seriously considering to switch to 25 kV / 50 Hz, which the ones with the DC-systems are doing in quite a few cases, at least for new railroad lines. That suggests that 15 kV / 16.7 Hz or 16 2/3 Hz is preferred over the DC systems.
The T406/AE 1107C Liberty shares a common core with the AE 3007 turbofan and AE 2100 turboprop series of engines, both of which have sold in the thousands of copies. [ 10 ] [ 11 ] 44-46 percent of parts are common between the T406 and the AE 3007, while about 76 percent of parts are common between the T406 and the AE 2100. [ 12 ]