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by the same concern and intended for a three-phase generator, is shown in Figs. 71 and 72. Both of these panels are shown in the manner arranged when intended to control a single generator. When a number of them are placed side by side to control an equal number of
Figure 68 Ground detectors in three phase circuit. generators connected in parallel, synchronizing lamps and accessories are provided. Fig. 73 illustrates, diagrammatically, the circuit connections of Fig. 69 together with the synchronizing attachments; and Fig. 74, in like manner, illustrates the connections of Fig. 71. All the parts of these diagrams are plainly marked so as to render further explanation unnecessary.
A switchboard made up of panels, manufactured by the Westinghouse Company, is shown in Figs. 75 and 76.