. Electric railway review . d air sprayer was provided for spray-ing the insulator with a finely divided salt spray closelyresembling the heavy fogs which come from the ocean. Acheese cloth bag of dust from the highway shaken at thewindward end of the testing box was found to be a veryefficient way of covering the insulators with dust. An electric 780 ELECTRIC RAILWAY REVIEW Vol. XVII, No. 24. fan was provided for the purpose of blowing the dust and saltspray on the insulators under test, but it was found that thewind, blowing from practically the same direction all of thetime, made its use un
. Electric railway review . d air sprayer was provided for spray-ing the insulator with a finely divided salt spray closelyresembling the heavy fogs which come from the ocean. Acheese cloth bag of dust from the highway shaken at thewindward end of the testing box was found to be a veryefficient way of covering the insulators with dust. An electric 780 ELECTRIC RAILWAY REVIEW Vol. XVII, No. 24. fan was provided for the purpose of blowing the dust and saltspray on the insulators under test, but it was found that thewind, blowing from practically the same direction all of thetime, made its use unnecessary. Results of Tests. Before beginning the actual tests on the insulators itwas necessary to make several changes in the arrangementof the transformer leads in order to prevent cases of sparkingand abnormal static discharges. The results of the testsin detail were as follows: 60,000-Volt Porcelain Insulators. Three on pole for eight months. Well coated with dustand salt on under surfaces and petticoats. Insulators in. Insulators for Exceptional Service—9 and 16 Inch PorcelainInsulators. parallel, as shown in diagram. Eight transformers thrownon for 10 minutes. No effect. Connection to the top of insulator from one side of trans-former and around the bottom of second petticoat from otherside. Then 56,640 volts was thrown on without was then moved from bottom of second petticoat tojust under corrugated top. Tested for 10 minutes. No effect. 60,000-Volt, Corrugated Top, 16-Inch Insulator. Insulator was put in the testing box and 56,600 voltsthrown on with no effect. When heavy spray from side ofbox was turned on, current arced over. Spray was turnedon the under sides of the petticoat with transformers off, and
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectstreetr, bookyear1906
