Wiring diagrams of electrical apparatus and installations (1913)
McGraw-Hill · New York, McGraw-Hill Book Company · leaf 204
31. Fig. 332. Fig. 331.—Connections for two-wire static ground detector. The principle is the same asthat of the quadrant electrometer. As long as the e.m.f. between the ground and each line isthe same* the hand remains in the upright position, pull on the vanes being balanced. In caseone side… … Fig. 333.-Fig. 334.resistances. Ground Gnounc/ Fig. 333. Fig. 334. -A three-wire or three-phase ground detector connected to a three-wire system.-Static ground detectors connected to a three-wire line through protective 194 WIRING DIAGRAMS OF ELECTRICAL APPARATUS
Electric wiring
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