An elementary book on electricity and magnetism and their applications . from it the operation of the wholeplant is controlled. It is the modern practice to construct switchboards in panels,which may be from 18 inches to 24 inches wide and perhaps6 feet high. They are usually made of slate or high-grademarble slabs, which are supported by a framework of structuralsteel anchored to the floor and wall of the building. Figure293 shows the front and side views of a single-panel switch-board and figure 294 is the back view, showing the leadsand busbars. Each vertical section or panel serves for the
An elementary book on electricity and magnetism and their applications . from it the operation of the wholeplant is controlled. It is the modern practice to construct switchboards in panels,which may be from 18 inches to 24 inches wide and perhaps6 feet high. They are usually made of slate or high-grademarble slabs, which are supported by a framework of structuralsteel anchored to the floor and wall of the building. Figure293 shows the front and side views of a single-panel switch-board and figure 294 is the back view, showing the leadsand busbars. Each vertical section or panel serves for thecontrol either of one generator or of a feeder or a group offeeders. In addition, there may be separate panels for exciters,recording meters, etc. Behind the whole length of the switch-board run two or three heavy copper bars called bus bars. POWER STATIONS AND DISTRIBUTION OF POWER 419 Since the generator panels are on one side and the feederpanels on the other, the bus bars must be made of very heavycross section so as to carry the total current of the station along. Insulating BlockCast Iron Bracket Main Fuses;Enclosed
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmagnetism, bookyear19
