Modern Wiring Diagrams and Descriptions; A Handbook of Practical Diagrams and Information for Electrical Construction Work, Showing at a Glance All Th

Modern Wiring Diagrams and Descriptions; A Handbook of Practical Diagrams and Information for Electrical Construction Work, Showing at a Glance All Th

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1918 edition. Excerpt: ... made with the exception of the armature. In this case current from contact 1 passes to ring Z' and then to B and armature, this causing current to flow in the opposite direction in armature and reversing the direction of rotation. In printing press work a stop is used which allows the reverse motion to take in two contacts only, thus limiting the reverse to two speeds. Figure 127 shows the connections of the General Electric K2 street car controller. This controller is of the series parallel type, and varies the speed of the car by connecting the motors first in scries and then in parallel, suitable resistance being used to give a gradual starting current. In Figure 128 are shown the various connections between the rheostat and motors obtained at the different points of the controller. In the upper left-hand corner the drum of the controller is laid out. T, Rl, R2, etc., are stationary.contacts with fingers which make contact with the various segments on the drum as it is revolved. At the right of the controller is the reversing; switch, by means of which the car can be made to go in either direction. The reverse switch is also a drum.on which are placed two sets of contacts, these making connection with the stationary points F2, AA2, etc., as the drum is revolved. If the controller drum is moved to point 1, the current from the trolley wire enters at T, then to segment on drum opposite T. From there it passes to contact Rl, then to rheostat K, through all the resistance to the point 19 on the reverse switch. With the reversing switch on F it.will then pass to Al, through the armature of motor No. 1 back to AA1, on the reverse switch and through field of motor No. 1 to the point El on the controller. From El it passes to the point 15 by means of...show more

Product details

  • Paperback | 46 pages
  • 189 x 246 x 3mm | 100g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236649095
  • 9781236649096