. Electric railway review . It was noted here thatvisible static discharges jumped from the bottom of petti-coat No. 3 to the wire around No. 2. a distance of 1 inchinstead of following the 7 inches of dust-covered surfacebetween the two points. The thin wire was next put aroundpetticoat No. 3 at the point d, about one inch from thebottom, and the wire on top restored to position e; 55,000volts were thrown on. Current arced over the surface be-tween the points e and d, a distance of 14 inches. Nine-Inch Top, 35,000-Volt, Porcelain Insulators. Had been on crossarm without disturbing. Coating of
. Electric railway review . It was noted here thatvisible static discharges jumped from the bottom of petti-coat No. 3 to the wire around No. 2. a distance of 1 inchinstead of following the 7 inches of dust-covered surfacebetween the two points. The thin wire was next put aroundpetticoat No. 3 at the point d, about one inch from thebottom, and the wire on top restored to position e; 55,000volts were thrown on. Current arced over the surface be-tween the points e and d, a distance of 14 inches. Nine-Inch Top, 35,000-Volt, Porcelain Insulators. Had been on crossarm without disturbing. Coating ofdust and salt accumulated by eight months exposure to theweather. Put on the insulated crossarm in the testing transformers caused a heavy static discharge over theinsulator. Not visible but made evident by a snapping transformers increased the snapping. Six transformers. «.^ Transformers. 220 fo0CVWis-—-3- ( fuses r . ,„ „ H £irtuif Breakers(Each Primary fused 10. flmp u rfa*jb 1. Insulators for Exceptional Service—Sketch Snowing Test Rack andStep-Up Transformer Connections. test voltage 42,000, 20 minutes. During the first few minutesstatic flashes were visible on the surface of the under petti-coat from the top down, but these gradually disappeared untilonly the snapping was heard. Seven transformers were tried;test voltage, 48,720; 20 minutes. Decided flashing on underside to top petticoat and on top of bottom one for first fewminutes, and then only an occasional flash. Eight trans-formers; voltage, 55,200; 30 minutes. The current arcedover the insulator after a few seconds, throwing the thrown on again only occasional flashes were visiblefor the rest of the time. Similai insulator had been inside of the station for eightmonths. Was well covered with dust. Seven volts; 20 minutes. Small bluish flashes near cementedjoint for first few minutes. Eight transformers; 55,200 volts:15 minutes. Slight in
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectstreetr, bookyear1906
