Failure of Disk Insulators on High-Tension Transmission Lines
Transactions of the American Institute of Electrical Engineers
mayed to see the pittiless manner in which it punctures defects rise of temperature. The low temperature of the corona apin petticoats and shells as mentioned by Mr. Wood. In fact pears to be due to its intensity which causes a high degree of it is preferable to seal the outer lips of the shell only to save the uniform ionization and high conductivity of the air. As the petticoats from puncturing. It might save years of misdirected current traversing this low resistance corona is only the small
... a is only the small effort if some of the advanced workers known to Mr. Peaslee charging current required by the dielectric the ohmic loss is would publish results of their tests. probably very small. By preventing the hot concentrated The very moderate temperature rise exhibited by hard fired flashover streamers the major source of heat is eliminated. disks after several minutes application of 120 per cent of flash-A number of units that had passed the over potential test over voltage must be due to low losses both within the dielectric were given the high-frequency test with maximum severity of and in the corona enveloping the surface. For porcelain having application without puncturing any of them. The greater an appreciable power factor the heat due to internal losses on number of punctures caused by the overpotential test doubtless this test is rapidly cumulative to quick puncture because there includes the same insulators as would be punctured by the 60is no cooling medium as in the iinmerzed oil test to prevent a cycle and high-frequency tests.