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Investigation of Transient Currents on Salt Contaminated Polymeric Insulator Surfaces

Investigation of Transient Currents on Salt Contaminated Polymeric Insulator Surfaces
Investigation of Transient Currents on Salt Contaminated Polymeric Insulator Surfaces
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.
1-4244-0750-8
707-710
Swaffield, D J
31f6f52e-fb48-44f9-99d3-3cbd2539f1b9
Lewin, P L
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Hilmi, N A
17945632-1fc7-4ff5-9208-a8873332d50c
Pratt, H M O
16acf6dd-f253-4c95-ae50-71613331b56f
Swaffield, D J
31f6f52e-fb48-44f9-99d3-3cbd2539f1b9
Lewin, P L
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Hilmi, N A
17945632-1fc7-4ff5-9208-a8873332d50c
Pratt, H M O
16acf6dd-f253-4c95-ae50-71613331b56f

Swaffield, D J, Lewin, P L, Hilmi, N A and Pratt, H M O (2007) Investigation of Transient Currents on Salt Contaminated Polymeric Insulator Surfaces. 9th IEEE International Conference on Solid Dielectrics, Winchester, United Kingdom. 07 - 12 Jul 2007. pp. 707-710 .

Record type: Conference or Workshop Item (Paper)

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.

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More information

Published date: 2007
Additional Information: Event Dates: 8 - 13 July 2007
Venue - Dates: 9th IEEE International Conference on Solid Dielectrics, Winchester, United Kingdom, 2007-07-07 - 2007-07-12
Organisations: Electronics & Computer Science, EEE

Identifiers

Local EPrints ID: 264260
URI: http://eprints.soton.ac.uk/id/eprint/264260
ISBN: 1-4244-0750-8
PURE UUID: f7b6207e-5953-483e-acf1-66355648445e

Catalogue record

Date deposited: 04 Jul 2007
Last modified: 20 Nov 2021 07:42

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Contributors

Author: D J Swaffield
Author: P L Lewin
Author: N A Hilmi
Author: H M O Pratt

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