Electricians' operating and testing manual; (1910)
Horstmann, Henry C. [from old catalog], Tousley, Victor Hugo, 1875- [from old catalog] joint author · Chicago, F. H. Drake & co · leaf 350
Figure 205 Figure 206 ground detector. The lamps shown above are not verysensitive and will not indicate a slight ground. Hencethe voltmeter is preferable. As long as both buttonsare in their normal position, the voltmeter measuresthe voltage of the system. By pressing down either … Figure 207 button, if a deflection is obtained, it indicates a groundon that side of the system to which the button belongs.Figure 207 shows ground detector connections usinglamps for an ordinary three-wire or three-phase sys-tem. Used in connection with the ordinary three-wire Ground Detectors and…
Electrical engineering · Electric testing
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