Transactions Volume 22, PT. 2

Transactions Volume 22, PT. 2

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1903 edition. Excerpt: ...to indicate that with proper arrangements, either the star or delta connection might be used with good results. If star connections are used on high voltage transformers, in fact on any transformers, it is desirable, in order to obtain proper safety, to have devices which will open all three legs of the circuit at one time but if the delta-connection be employed, you may use singlepole switches. For this and other reasons, up to the present tine, I have always considered that there were advantages in using a delta-connected system. Single transformers may be conveniently switched into and out of service; single-pole switches may be employed if desired and at the same time all those excessive potentials mentioned by Mr. Peck will be avoided and resonance will not be likely to result. In other words, a plain delta is at once a flexible and safe arrangement to adopt. In reference to high-tension circuit-breakers for transmission lines, the time is coming, if it be not here already, when an oilswitch can be obtained, together with reverse current and overload operating devices for any voltage and capacity, which will open all three legs of a circuit. Mr. Nunn touched upon this subject just now, and it is of great importance, especially with a star-connected system. Whether the star connection is the more desirable is another question, but I do not consider it vital in connection with operation, if proper precautions are taken. I do, however, consider the proper arrangement of switches, with either the star or the delta, a very important problem in connection with the system. Mr. A. L. Mudge: --Page 386, lines 16 and 17, the words "And the other two still deliver 3-phase power up to their full capacity, i.e., two-thirds of their...show more

Product details

  • Paperback | 232 pages
  • 189 x 246 x 12mm | 422g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236918517
  • 9781236918512