Commercial Electrical Testing
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In our eReader you can find the full English version of the book. Read Commercial Electrical Testing 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 Commercial Electrical Testing
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The ratios between the primary and secondary voltage should be taken with the secondary open circuited. 156 COMMERCIAL ELECTRICAL TESTIKG Calculation of Impedance Test on Induction Motors Table XVII shows the form used in calculating an impedance test, and Fig. 40 the method of plotting it. Torque Two methods are used for measuring torque on induc- tion motors, one employing a spring balance and the other a special torque indicator. /oo 2OO 3OO 40O fo/fy 50O Fig. 40. Iroredance Curve on a 100 H.... P. , 2080 Volt, 1200 R. P. M. , 60 Cycle, 3-Phase Induction Motor In the first method a wooden brake lever is clamped around the pulley as shown in Fig. 41. The size and length of lever depends on the size of the motor, the length being chosen to give a maximum reading at one- half or two-thirds the capacity of the spring balance used, Let the point of attachment to the lever be at X; then the length of the lever arm = XY. On the frame of INDUCTION MOTORS 157 the motor a mark should be made at M, and a pointer, P, attached to the lever as shown.
What to read after Commercial Electrical Testing?
You can find similar books in the "Read Also" column, or choose other free books by Edgar Francis Collins to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The ratios between the primary and secondary voltage should be taken with the secondary open circuited. 156 COMMERCIAL ELECTRICAL TESTIKG Calculation of Impedance Test on Induction Motors Table XVII shows the form used in calculating an impedance test, and Fig. 40 the method of plotting it. Torque Two methods are used for measuring torque on induc- tion motors, one employing a spring balance and the other a special torque indicator. /oo 2OO 3OO 40O fo/fy 50O Fig. 40. Iroredance Curve on a 100 H.... P. , 2080 Volt, 1200 R. P. M. , 60 Cycle, 3-Phase Induction Motor In the first method a wooden brake lever is clamped around the pulley as shown in Fig. 41. The size and length of lever depends on the size of the motor, the length being chosen to give a maximum reading at one- half or two-thirds the capacity of the spring balance used, Let the point of attachment to the lever be at X; then the length of the lever arm = XY. On the frame of INDUCTION MOTORS 157 the motor a mark should be made at M, and a pointer, P, attached to the lever as shown.
What to read after Commercial Electrical Testing?
You can find similar books in the "Read Also" column, or choose other free books by Edgar Francis Collins to read onlineMoreLess
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