Handbook of Electric Power Calculations by H. Wayne Beaty, Visit Amazon's Surya Santoso Page, search

By H. Wayne Beaty, Visit Amazon's Surya Santoso Page, search results, Learn about Author Central, Surya Santoso,

I'm a PhD candidate in strength Engineering and that i came across this ebook the main relied on guide in energy electric engineering; in spite of the fact that you will have a few event or wisdom approximately strength process to appreciate the examples.

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3. Select Current Transformer Because the current is greater than 20 A, a current transformer is required. A transformer is chosen that can accommodate a somewhat higher current; a 150:5 current transformer is therefore selected. The ammeter is a 5-A meter with its scale calibrated from 0 to 150 A. 4. Connect Ammeter and Transformer to Line The ammeter is connected to the line, through the current transformer, as in Fig. 3. Precautions The secondary of the transformer is to be closed at all times.

Pressure Measurement . . . . . . . . . . Bibliography . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 VOLTAGE MEASUREMENT The line voltage of a three-phase 4160-V power line supplying an industrial plant is to be measured. Choose the appropriate voltmeter and potential transformer for making the measurement.

Calculation Procedure 1. 8 A. This is the full-load current when the machine is operated as a generator. 2. 8 A. 8 A) ϭ 238 V. 3. 4 W. 4. Calculate the Field Current Required at Full Load Under generator operation at full load, the armature current is the sum of the load current plus the shunt-field current, IL ϩ If. Use the equation: Vt ϭ 240 V ϭ ea Ϫ Ra(IL ϩ If). 10 If. From observation of the no-load saturation curve (Fig. 0 A; the equation is satisfied. 6 V. It may be necessary to make one or two trial attempts before the equation is satisfied.

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