Hobart, H. M. (Henry Metcalf), 1868-1946 ed · Philadelphia, J. B. Lippincott · leaf 152
Fig. 2. —a TypicalArrangement of a RelayCircuit and a StatterTime-lag Device … Fig. 3.—Differential Selay Transformer, and Keverae-current Circuit Brealcer Discriminating Device fig. 3, from which it will be seen that whenthe currents are as indicated, the circuit Ahas the larger emf induced in it, whereas,should the main current reverse with refer-ence to the shunt current,…
Electrical engineering
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