Electrical news and engineering . educes that ratio to (at one quarter of normal load). Itwill be observed that the waves just touch the zero line. As non-inductive load is applied, the peaks drop a littleand the base of the wave rises from the zero line, Fig. 24. Weare now approaching still closer to the direct current idealconditions. As the load increases the form factor drops, rath-er quickly at first, and later more gradually. Fig. 25, until avalue of is reached. Running under the above conditions it may happen thatone or even two of the bulbs may burn out. A bulb may be-come in
Electrical news and engineering . educes that ratio to (at one quarter of normal load). Itwill be observed that the waves just touch the zero line. As non-inductive load is applied, the peaks drop a littleand the base of the wave rises from the zero line, Fig. 24. Weare now approaching still closer to the direct current idealconditions. As the load increases the form factor drops, rath-er quickly at first, and later more gradually. Fig. 25, until avalue of is reached. Running under the above conditions it may happen thatone or even two of the bulbs may burn out. A bulb may be-come inoperative. If so, it is usually on account of the wear-ing out of the filament. When one bulb burns out the voltage and current waves assume the shape shown in Fig. 2C. When two bulbs burnout at the same time, the voltage and current are both verymaterially reduced on account of the impedance of the twophases without load, and the respective waves are as shown inFig. 27. Fig. 28, the voltage and current from this three phase con-. peaks () percycle of supply. nection with an inductive load, shows us a still better formfactor as the ripple is reduced in amplitude, being fartherfrom the base line. Considering the characteristics of this three phase combin-ation. Fig. 29, we see that the efficiency and power factor are
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