Principles of Transformer Design
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In our eReader you can find the full English version of the book. Read Principles of Transformer Design 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 Principles of Transformer Design
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, but the inner tube might be made 1. 75 in. Or 2 in. Instead of 2. 25 in. , and a practical terminal for 88, 000- volt service could undoubtedly be constructed with a diameter over the insulation not exceeding 5. 25 in.
The projection of the terminal above the grounded plate (the cover of the transformer case) need not be so great as would be indicated by the application of the practical rule previously given for surface leakage dis- tance, namely, that this distance should be(o. 5H -- -1 \ 2 .../ in. , where kv. Stands for the working pressure. The reason why a somewhat shorter distance is permissible is that the surface of the terminal proper has been cov- ered by varnish and a solid compound, and so far as the enclosing cylinder is concerned, the stress along the sur- * Same as in the example of the compound-filled insulator.
68 PRINCIPLES OF TRANSFORMER DESIGN face of this cylinder will be fairly uniform, especially if a large flux-control shield is provided, as shown in Fig. 26. In order to avoid the formation of corona at the lower terminal (below the surface of the oil) this end may conveniently be in the form of a sphere, the diameter of which would depend upon the voltage and the prox- imity of grounded metal.
What to read after Principles of Transformer Design?
You can find similar books in the "Read Also" column, or choose other free books by Alfred Still to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
, but the inner tube might be made 1. 75 in. Or 2 in. Instead of 2. 25 in. , and a practical terminal for 88, 000- volt service could undoubtedly be constructed with a diameter over the insulation not exceeding 5. 25 in.
The projection of the terminal above the grounded plate (the cover of the transformer case) need not be so great as would be indicated by the application of the practical rule previously given for surface leakage dis- tance, namely, that this distance should be(o. 5H -- -1 \ 2 .../ in. , where kv. Stands for the working pressure. The reason why a somewhat shorter distance is permissible is that the surface of the terminal proper has been cov- ered by varnish and a solid compound, and so far as the enclosing cylinder is concerned, the stress along the sur- * Same as in the example of the compound-filled insulator.
68 PRINCIPLES OF TRANSFORMER DESIGN face of this cylinder will be fairly uniform, especially if a large flux-control shield is provided, as shown in Fig. 26. In order to avoid the formation of corona at the lower terminal (below the surface of the oil) this end may conveniently be in the form of a sphere, the diameter of which would depend upon the voltage and the prox- imity of grounded metal.
What to read after Principles of Transformer Design?
You can find similar books in the "Read Also" column, or choose other free books by Alfred Still to read onlineMoreLess
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