. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . General Electric Companys New High Frequency OscillatorAppliance for Testing Porcelain, Insulators and Bushings One of the recent developments of thelaboratories of the General Electric Com-pany, and now commercially available, isthe 125,000-volt, portable, high frequencyoscillator, an outfit designed for the pur-of testing porcelain, high tensionline insulators and bushings by means ofhigh frequency, high potential equipment is built for operation on25, 40, 50 and 60 cycle circu
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . General Electric Companys New High Frequency OscillatorAppliance for Testing Porcelain, Insulators and Bushings One of the recent developments of thelaboratories of the General Electric Com-pany, and now commercially available, isthe 125,000-volt, portable, high frequencyoscillator, an outfit designed for the pur-of testing porcelain, high tensionline insulators and bushings by means ofhigh frequency, high potential equipment is built for operation on25, 40, 50 and 60 cycle circuits, and may-be connected for 110 or 220 volts. It re-quires about kv-a. at 25 cycles, 2kv-a. at 40 cycles and 2J/2 kv-a. at 60cycles, and will deliver current having fre-quencies of approximately 300,000 cyclesat voltages up to about 165,000 volts. In addition to the 125,000-volt set, towhich this description applies, a 250,000-volt set for testing large porcelain partscan be furnished. A set isunder construction. A small 100,000-voltset designed to test a single insulator and. INTERIOR VIEW OF THE NEWFREQUENCY OSCILLATOR. to meet exacting requirements of port-ability will shortly be available. Althoughthis last set does not have all the refine-ments of the larger sets, it should be verywell suited for testing insulators on aline and for rough testing of stocks ofnew insulators ready to be placed inservice. The usual high potential test of ap-paratus is to apply twice its rated voltageat 60 cycles for one minute. It can besaid, however, that insulators successfullypassing this test never fail in practicedue to 60 cycle potential; but they aredamaged electrically by lighting, by heavyfrom switching, by heavy surgesfrom arcing grounds and similar causes,where high frequency is always presentand there is a menacing rise in would seem, therefore, in order tospfeguard against all such natural hazardsand assure a greater factor of safetyagainst failur
Size: 2135px × 1170px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookidrailwaylocom, bookyear1901
