A Short Course in the Testing of Electrical Machinery for Nonelectrical Student
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In our eReader you can find the full English version of the book. Read A Short Course in the Testing of Electrical Machinery for Nonelectrical Student Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book A Short Course in the Testing of Electrical Machinery for Nonelectrical Student
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To quickly assess the difficulty of the text, read a short excerpt:
It will be found that the value of a is almost directly proportional to the load.
With the connections as in Fig. 33, obtain the phase charac- teristics of the motor for no load, J load and full load. On each curve get about 8 points, using for armature current not more 136 TESTING OF ELECTRICAL MACHINERY than 150 per cent of the motor, i. E. , in Fig. 29, OY should not be greater than 50 per cent above the rating of the motor. The motor may be loaded by Prony brake or, what is more convenient,... by a D. C. Generator. The generator may be used as a starting Lamp -x- 110 Volt D. C. Line Generator Motor FIG. 32 motor until the A. C. Motor is synchronized and then it may be used as generator to load the synchronous motor.
In getting the phase characteristics it is not necessary to know the exact load on the motor; \ rated current may be used as half load, etc.
FIG. 33 The impressed voltage and frequency are to be held constant; read volts, amperes, watts input and field current.
Plot on one sheet, against field current as abscissa, watts input, amperes input and power factor for each of the runs.
What to read after A Short Course in the Testing of Electrical Machinery for Nonelectrical Student?
You can find similar books in the "Read Also" column, or choose other free books by J Harold Morecroft to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
It will be found that the value of a is almost directly proportional to the load.
With the connections as in Fig. 33, obtain the phase charac- teristics of the motor for no load, J load and full load. On each curve get about 8 points, using for armature current not more 136 TESTING OF ELECTRICAL MACHINERY than 150 per cent of the motor, i. E. , in Fig. 29, OY should not be greater than 50 per cent above the rating of the motor. The motor may be loaded by Prony brake or, what is more convenient,... by a D. C. Generator. The generator may be used as a starting Lamp -x- 110 Volt D. C. Line Generator Motor FIG. 32 motor until the A. C. Motor is synchronized and then it may be used as generator to load the synchronous motor.
In getting the phase characteristics it is not necessary to know the exact load on the motor; \ rated current may be used as half load, etc.
FIG. 33 The impressed voltage and frequency are to be held constant; read volts, amperes, watts input and field current.
Plot on one sheet, against field current as abscissa, watts input, amperes input and power factor for each of the runs.
What to read after A Short Course in the Testing of Electrical Machinery for Nonelectrical Student?
You can find similar books in the "Read Also" column, or choose other free books by J Harold Morecroft to read onlineMoreLess
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