Basic Electrical Installation Work

| Kategorie: Kniha  |

Strana 106 z 399

Jak získat tento dokument?






Poznámky redaktora
c. .7071 the maxi- mum value. voltage. For any sinusoidal waveform the average value equal 0. .2V and maximum value almost 325. Such waveform has average value about 207.9 Sinusoidal waveform showing instantaneous values voltage. V V V V av max 6 1 6 0 637 . Example The sinusoidal waveform applied particular circuit has maximum value 325.c. The value can found from the following formula applied the sinusoidal waveform shown Fig.637 the maximum value.3 V. . . When say that the main supply domestic property 230V, really mean 230V rms. 90 30 180 150 120 60 V V V1 V5 V6 V2 V4 V3 FIGURE 4. The rms value the square root the mean the individual squared val- ues and the value a. .9. ⬖ l lue V rms max rms V V V 7071 0 7071 325 230 . 4. equivalent value almost always give the rms value without identifying such.c. voltage which produces the same heating effect d.9. 4.3V but because the rms value gives the d. Average value V rms va av max av V V V 637 0 637 325 207 2 . For any sinusoidal waveform the rms value equal 0. V V V V rms max 1 2 2 2 3 2 4 2 5 2 6 2 6 0 7071 .Basic electrotechnical units and theory 95 The average value the average over one half-cycle the instantaneous values they change from zero maximum and can found from the following formula applied the sinusoidal waveform shown Fig. Calculate the average and rms value the waveform