Practical wireless telegraphy; a complete text book for students of radio communication (1917)
Bucher, Elmer Eustice, 1885- · New York, Wireless Press, Inc · leaf 60
on 550 Volts Circuit, current and the fuses at F-1 should have capacity of 5 or 6 amperes. On the other hand, the strength of the current in the primarywinding P is relatively low and much smaller fuses will be employed to protect this circuit. When electrical energy is transferred from theprimary… … AT IB Fig. 62—Showing Use of Step-Down Transformer. and the circuits associated therewith take 440 watts we may assume a value of 500 wattsfor the circuit P^ Since the number of watts in a given circuit = I >< E, then (assuming W - 500no ohase displacement) I = — or for winding P, I = = 0.22…
Telegraph, Wireless
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