. Practical wireless telegraphy; a complete text book for students of radio communication . owly acrossthe contact studs on the startercurrent is admitted to the motor arm-ature by small increments which setsit into rotation, the speed graduallyincreasing as the handle movestoward the final or full running po-sition. When this position is at-tained, the magnet M grips thehandle and holds it in position untilit is released by opening the mainD. C. line switch. The diagramshows the Cutler-Hammer starterconnected to a shunt wound motor. It is important that a motorbe started neither too rapidly n
. Practical wireless telegraphy; a complete text book for students of radio communication . owly acrossthe contact studs on the startercurrent is admitted to the motor arm-ature by small increments which setsit into rotation, the speed graduallyincreasing as the handle movestoward the final or full running po-sition. When this position is at-tained, the magnet M grips thehandle and holds it in position untilit is released by opening the mainD. C. line switch. The diagramshows the Cutler-Hammer starterconnected to a shunt wound motor. It is important that a motorbe started neither too rapidly nortoo slowly. If the former condi-tion obtains the fuses in serieswith the line to the motor armature will melt, but if the starting handle is movedtoo slowly across the contact studs, the internal resistance coils will overheat andperhaps burn out. The speed of acceleration of the starting handle can usuallybe gauged by observing the speed of the motor armature. It should require nomore than 15 seconds to start the motors used in connection with wireless tele-graph apparatus. ARWiATURt. Fig. 71a—Cutler-Iiamraer Hand Motor Starter. 1 A F
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttelegra, bookyear1917
