. Theory and calculation of alternating current phenomena . Fig. 62. Fig. 63. 72 ALTERNATING-CURRENT PHENOMENA Figs. 62 to 64, give the vector diagram for ^o = 100, x = ,X =. 0,x = - , and Zo = + 4. Compensation for Lagging Currents by ShuntedCondensive Reactance 61. We have seen in the preceding paragraphs, that in aconstant potential alternating-current system, the voltage atthe terminals of a receiver circuit can be varied by the use ofa variable reactance in series with the circuit, without loss ofenergy except the unavoidable loss due to the resistance andhysteresis of
. Theory and calculation of alternating current phenomena . Fig. 62. Fig. 63. 72 ALTERNATING-CURRENT PHENOMENA Figs. 62 to 64, give the vector diagram for ^o = 100, x = ,X =. 0,x = - , and Zo = + 4. Compensation for Lagging Currents by ShuntedCondensive Reactance 61. We have seen in the preceding paragraphs, that in aconstant potential alternating-current system, the voltage atthe terminals of a receiver circuit can be varied by the use ofa variable reactance in series with the circuit, without loss ofenergy except the unavoidable loss due to the resistance andhysteresis of the reactance; and that, if the series reactance isvery large compared with the resistance of the receiver circuit,the current in the receiver circuit becomes more or less inde-pendent of the resistance—that is, of the power consumed inthe receiver circuit, which in this case approaches the conditionsof a constant alternating-current circuit, whose current is I = Eo ?\/r^ -}- xo^ , or, approximately, / Eo Xq This potential control, however, causes the current takenfrom the mains to lag greatly behind the , and therebyrequires a much larger current than corresponds to the powerconsumed in the recei
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