Dynamo electric machinery; its design, construction, and operation; direct-current machines (1915)
Sheldon, Samuel, 1862-1920, Hausmann, Erich, 1886- joint author · New York, D. Van Nostrand Company; · leaf 313
Company. The metal parts of such switches consist of copper hinges,blades, and clips, and these must be properly designed tohave sufficient current-carrying capacity and contact surface. CENTRAL-STATION EQUIPMENT. 301 It is usual to allow one square inch of cross-sectional areafor every 800 to 1000… … Fig. 196. inches, are given in the following table. Frequentlyswitches are provided with fuse connections, and also lugsinto which the ends of the leads are soldered. SIZE OFSWITCH MINIMliM SEPARATIONOF METAL PARTS OFOPPOSITE POLARITY MINIMUM BREAK DISTANCE I2SV. ORLESS 125 V. TO 250 V. 250 V. TO…
Electric machinery
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