. Electric railway review . ried by the windfor considerable distances, in certain places where the wavesbeat upon a rocky coast. (3) Yearly dry seasons of fromfour to six months, during which time the highways becomevery dusty and the insulators are not washed off. (4) Theproximity of the transmission line to the county road forpractically its whole length. (5) The trade winds blowingfrom the ocean for months during the dry foggy season. (6)The fact that no line had been operated under similar climatic conditions at over 11,000 volts. (7) An 11,000-volt line whichwould be paralleled for some
. Electric railway review . ried by the windfor considerable distances, in certain places where the wavesbeat upon a rocky coast. (3) Yearly dry seasons of fromfour to six months, during which time the highways becomevery dusty and the insulators are not washed off. (4) Theproximity of the transmission line to the county road forpractically its whole length. (5) The trade winds blowingfrom the ocean for months during the dry foggy season. (6)The fact that no line had been operated under similar climatic conditions at over 11,000 volts. (7) An 11,000-volt line whichwould be paralleled for some 14 mites had had a great dealof trouble from burnouts caused by the insulators becomingcovered with a coating of dust and salt. After consulting the officials of the Big Creek Power Com-pany relative to their experience in operating this latter-mentioned 11,000-volt line, it was decided to establish a test-ing station at a place called Yellowbank, about 10 miles fromSanta Cruz, where they reported that they had had a number. Insulators for Exceptional Service—Near View of Testing Box,Showing Insulator and Dust Bag. of burnouts caused by the insulators becoming coated withdust from the highway and salt from spray and fogs. Testing Station. The station as illustrated was built at this place in thefall of 1905, and samples of different types of insulators wereplaced on the insulated crossarms on the pole outside of thestation. An 11,000 to 440-220-volt transformer was placed ona pole outside of the station, power being supplied from oneleg of the three-phase. 11,000-volt, 60-cycle transmission lineof the Big Creek Power Company. Eight 2 ^-kilowatt, 5,700-6,600 to 110-220-volt transformers were placed inside of thestation and connected as shown in the diagram, giving a testvoltage ranging from 6,600 to 55,000 volts. Plan of Testing. When this station was built the plan was to test theinsulators on the poles under the natural climatic conditions,but by the time the station was com
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectstreetr, bookyear1906
