Wiring diagrams of electrical apparatus and installations (1913)
McGraw-Hill · New York, McGraw-Hill Book Company · leaf 202
z f+4 1 ^ ? \j Fig. 322.—Power-factor meter connected toa three-phase circuit. Fig. 323.—Power-factor meter connectedto a four-wire three-phase circuit. MEASURING INSTRUMENTS 191 Line lAdLL -^ Load Fig. 324.—Connections for a three-phase watt-hour meter. … Fig. 325.—Connections for three-phase v/att-hour meter using three-series transformers.
Electric wiring
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