Hydro-Electric Power Stations
Hydro-Electric Power Stations
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In our eReader you can find the full English version of the book. Read Hydro-Electric Power Stations 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 Hydro-Electric Power Stations
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For straight three-phase connection, however, the three-phase rating becomes 5. 196#7 and in this case the single-phase capacity is 77 per cent of the three-phase.
With star connection shown in Fig. 175, two of the phases carry all of the current while the third phase is idle and could be omitted, although it is generally added, being a reserve in case of accident to either of the other phases. With the star arrange- ment, as shown, two-thirds of the winding is almost in phase with the single-p...hase terminal e. M. F. , being 86. 6 per cent effective, and this arrangement is, therefore, about 15 per cent more effective than the delta connection shown in Fig. 173.
The three-phase rating is SEXl X\/3 or equal to 5. 1967*77, while the single-phase rating is equal to 3EI; thus 57. 7 per cent of the three-phase rating. This is by far the most common method of connecting armature windings for single-phase service.
The general practice in building single-phase generators is to use a Y-wound stator and give it a rating from 65 per cent to 70 per cent of the three-phase rating.
What to read after Hydro-Electric Power Stations?
You can find similar books in the "Read Also" column, or choose other free books by David Barker Rushmore to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
For straight three-phase connection, however, the three-phase rating becomes 5. 196#7 and in this case the single-phase capacity is 77 per cent of the three-phase.
With star connection shown in Fig. 175, two of the phases carry all of the current while the third phase is idle and could be omitted, although it is generally added, being a reserve in case of accident to either of the other phases. With the star arrange- ment, as shown, two-thirds of the winding is almost in phase with the single-p...hase terminal e. M. F. , being 86. 6 per cent effective, and this arrangement is, therefore, about 15 per cent more effective than the delta connection shown in Fig. 173.
The three-phase rating is SEXl X\/3 or equal to 5. 1967*77, while the single-phase rating is equal to 3EI; thus 57. 7 per cent of the three-phase rating. This is by far the most common method of connecting armature windings for single-phase service.
The general practice in building single-phase generators is to use a Y-wound stator and give it a rating from 65 per cent to 70 per cent of the three-phase rating.
What to read after Hydro-Electric Power Stations?
You can find similar books in the "Read Also" column, or choose other free books by David Barker Rushmore to read onlineMoreLess
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