DocumentCode :
3279175
Title :
Investigation of Transient Currents on Salt Contaminated Polymeric Insulator Surfaces
Author :
Swaffield, D.J. ; Lewin, P.L. ; Hilmi, N A ; Pratt, H.M.O.
Author_Institution :
School of Electronics and Computer Science, University of Southampton, Southampton, SO17 1BJ, United Kingdom. Email: djs@ecs.soton.ac.uk
fYear :
2007
fDate :
8-13 July 2007
Firstpage :
707
Lastpage :
710
Abstract :
To prevent potentially fatal electrocution when a construction crane accidentally touches a power line a load bearing electrical insulating link can be used. This is placed between the crane hook and the load to prevent electrical conduction through the crane and load to a "Rigger", a person guiding the load from the ground. An investigation of laboratory testing procedures of salt contaminated polymeric coated crane insulating links was observed to display transient earth-leakage current during clean-fog testing. These transients were shown to be related to the amount of water reaching the surface and the time between energizations at power frequency ac voltage. Investigation of these transients is described in this paper. Results allow three types of transient waveform to be identified, each appearing at different periods during the 1 hour fog tests performed. The greater the water flow rate supplying fog to the test chamber the more rapid is the transient behaviour progressed through the 3 types identified. A hypothesis of the surface and contaminant behaviour is offered to explain the observed results.
Keywords :
Cranes; Dielectrics and electrical insulation; Displays; Frequency; Laboratories; Plastic insulation; Polymer films; Surface contamination; Testing; Water pollution;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Solid Dielectrics, 2007. ICSD '07. IEEE International Conference on
Conference_Location :
Winchester, UK
Print_ISBN :
1-4244-0750-8
Electronic_ISBN :
1-4244-0751-6
Type :
conf
DOI :
10.1109/ICSD.2007.4290912
Filename :
4290912
Link To Document :
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