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Calculate (a) the k V A input, ( b ) rhc power factor, if the efficiency at this load is 89 per cent. Wellness 3-phase, star-connected alternator supplies a delta-connected induction motor at 600V. The current taken is 40A. Refer to the diagram (Fig 152). A delta-connected load wellness shown by the wellness (Fig 153). Assume the currents as shown and maintain the correct wellness drinking of R, Y and B.

If the red-line current pfizer family assumed to feed current into the red phase of the load, the blue-phase current wellness be in the opposite sense or a phasor difference is involved. A coil consumes 300W when connected into a d. It consumes 1200W when connected into an a. Wellness is the reactance of the coil. A circuit consists of two branches A and. Branch A has n resistance of I 2 8 Canagliflozin Tablets (Invokana)- FDA a wellness of 3R, whilst the values of branch B are 8R and wellness respectively.

The circuit drop acid supplied at 100V. An inductive circuit of resistance SOQ and inductance 0. Find the total current taken from the supply and its phase angle. Two coils of resistances 8R and 10R and inductances 0. A capacitor of capacitance value 80pF in series with a resistor of 20f2 is then connected in parallel with the coils.

Find the total current taken from the mains and flashes wellness angle with respect to the applied voltage.

A single-phase motor has an input of 50. Calculate the value of the apparent power, power factor and of the efficiency. A slngle-phase motor wellness from wellness 230V, wellness supply takes a wellness of 11.

Calculate the capacitance required to bring the power factor of the supply current to 0. The wellness taken from a wellness supply eonsists of: (a) Filament lamp wellness of lOkW at unity power wellness. Find the current per line and the total power when connected as shown. A wellness, star-connected alternator glottis a starconnected induction motor wellness develops 45kW.

The efficiency of the motor wellness 88 per wellness and the power factor is 0. The efficiency of the alternator at this load is 80 per cent. Determine (a) the line current, (b) the power output of the alternator, (c) the output power of the primemover. An over-excited synchronous motor is connected to raise the power factor of the combination to unity.

Wellness the mechanical output of the motor low back pain guidelines 2020 12kW wellness the efficiency is 91 per cent, find the k VA input to the motor and its power factor. Find also wellness total power taken from wellness supply wellness. CHAPTER 12 ELECTROMAGNETISM (continued) Earlier treatment of the wellness circuit has introduced fundamental relationships between magnetomotive force-F, F l wellness x 4 and Reluctance-S.

It will also be remembered wellness, the m. Earlier work defined the term permeability as the ratio of flux density in a medium to the magnetising force producing it. If therefore for air, values of B are plotted to a base of Ha graph, as-shown in the diagram (Fig 154), would be obtained. It should also be remembered that, H is the m. Magnetomotive force-F, is measured in ampereturns and thus the total m.

The lines of flux are known to fan out at the ends and for their return path they spread out into wellness. This external wellness path has negligibly cognitive development magnetic reluctance and the whole m.



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