Georgia Power

About: Georgia Power is a company organization based out in Atlanta, Georgia, United States. It is known for research contribution in the topics: Electric power transmission & Voltage. The organization has 73 authors who have published 66 publications receiving 932 citations. The organization is also known as: Georgia Railway and Power Company.

Measurements, correlations and limitations of soil thermal stability

Abstract: Thermal instability occurs in a moist porous medium as a result of significant moisture movement when the medium is subjected to thermal gradients due to the presence of a heat source. The moisture movement produces a dry region surrounding the heat source which in turn inhibits the dissipation of heat from the source. When heat is generated in underground power systems, soil thermal instability can produce significant increases in cable operating temperatures as the soil moisture moves away from the region surrounding the cable. This paper discusses a simple thermal probe test that can be used to quantitatively determine if the native soil or a thermal backfill will become thermally unstable when heated by a buried cable. The probe test can be used in the field or in the laboratory and the test results can be used to rapidly and accurately evaluate the thermal behavior of soils when heated by cables with a wide range of diameters. A large number of thermal stability measurements on soils ranging from pure sands to soils with a high clay content have been collected and analyzed. These results suggest a limiting cable heat transfer rate as a means of calculating cable ampacities that will produce stable conditions. The influence of multiple heat sources on thermal stability is also discussed.

Correlation of Electrochemical Treeing in Power Cables Removed from Service and in Cables Tested in the Labaratory

Abstract: Laboratory tests were performed to develop a relationship between treeing in extruded dielectric crosslinked polyethylene power cables removed from field service and cables tested in the Georgia Power Company Research Laboratory.

Determination Of Maximum Safe Pulling Lengths For Solid Dielectric Insulated Cables

Abstract: Under the auspices of the Electric Power Research Institute, Pirelli Cable Corporation, assisted by Georgia Power Company, performed an extensive investigation into the determination of maximum pulling lengths of current designs of extruded dielectric cables in ducts. Important parameters which can affect the pulling length, such as coefficients of friction, cable lubricants and tension and sidewall bearing pressure levels, were investigated. The results of the laboratory test program were verified and augmented by simulated field testing. The findings of this investigation were utilized in the preparation of a pulling guide to assist the cable engineer in the design of installations which are more reliable and economical than possible with present guidelines established over thirty years ago.

Laboratory Estimation of Occupational Exposures to Volatile Organic Compounds During Nail Polish Application.

Abstract: In the United States, there are more than 120,000 nail salons in which workers could be potentially exposed to a number of volatile organic compounds (VOCs) used in various procedures. Measuring workers exposure in the field is time-consuming and could be very expensive. The purpose of this study was to estimate the VOC levels in the proximity of workers in nail salons through simulating the application process of some popular nail polishes in a laboratory chamber. The worst-case scenario was defined as a worker's exposure during nail polish application to one set of fingernails every 15 minutes for an 8-hour shift (total nail sets = 32). Nail polish was applied on paper plates in a flow-controlled test chamber. Air was sampled during the application of five different nail polishes for 8 hours using passive air samplers and the experiment was triplicated. Passive samplers were used for VOCs and formaldehyde. In this worst-case scenario setting, a total of 17 VOCs were detected, with eight that were found in all the samples. The mean concentration of butyl acetate (161-330 ppm, parts per million) and ethyl acetate (440 ppm) exceeded the threshold limit value (TLV) of 150 ppm and 400 ppm, respectively. Formaldehyde was analyzed separately and the mean concentrations exceeded the TLV of 0.10 ppm in all types of nail polish, ranging from 0.12 ppm to 0.22 ppm. Occupational safety and health professionals could use these data to increase awareness of workers' potential exposure to high levels of VOCs in nail salons and recommend practical measures to reduce potential exposures.

Lightning Protection of Distribution Transformers

Abstract: Data on the results of lightning protection for distribution transformers on the system of the Georgia Power Company have been compiled, to determine the improvement resulting from changes which have been made, particularly the interconnection of the ground leads of the primary arrester with the transformer secondary neutral. The data indicate that such interconnection has not produced all the benefits expected. The experience with lightning protection is presented in an impartial manner, and without attempting to offer a solution of existing problems.