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Oil flow damage in Kraft paper 1: Thermal aging

Oil flow damage in Kraft paper 1: Thermal aging
Oil flow damage in Kraft paper 1: Thermal aging
Thermal aging was used as a tool to prepare samples of Kraft paper spanning its entire life cycle in a high voltage transformer, from new to end of life. After characterization of D Pand mechanical properties, selected samples were exposed to oil flows mimicking ONAN, OFAF and reclamation conditions. Aging combined with high flow rates, led to significant surfacer oughening but despite this, no significant erosion was detected even under reclamation conditions. Whilst the tests need to be repeated at higher oil temperatures which more closely reflect conditions in plant, these preliminary findings indicate that the paper insulation component is unlikely to be damaged by normal reclamation activities, even in significantly aged assets.
Kraft paper, Thermal aging, DP, Mineral oil
64-67
Institute of Electrical and Electronics Engineers
Hosier, Ian
6a44329e-b742-44de-afa7-073f80a78e26
Lewin, Paul
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Wilson, Gordon
7a31e00c-3076-4241-9226-70bb05e35570
Hosier, Ian
6a44329e-b742-44de-afa7-073f80a78e26
Lewin, Paul
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Wilson, Gordon
7a31e00c-3076-4241-9226-70bb05e35570

Hosier, Ian, Lewin, Paul and Wilson, Gordon (2021) Oil flow damage in Kraft paper 1: Thermal aging. In Proceedings of the 2021 electrical insulation conference. Institute of Electrical and Electronics Engineers. pp. 64-67 .

Record type: Conference or Workshop Item (Paper)

Abstract

Thermal aging was used as a tool to prepare samples of Kraft paper spanning its entire life cycle in a high voltage transformer, from new to end of life. After characterization of D Pand mechanical properties, selected samples were exposed to oil flows mimicking ONAN, OFAF and reclamation conditions. Aging combined with high flow rates, led to significant surfacer oughening but despite this, no significant erosion was detected even under reclamation conditions. Whilst the tests need to be repeated at higher oil temperatures which more closely reflect conditions in plant, these preliminary findings indicate that the paper insulation component is unlikely to be damaged by normal reclamation activities, even in significantly aged assets.

Text
EIC2021_Paper1109_Rev - Accepted Manuscript
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More information

Published date: 30 July 2021
Venue - Dates: Electrical Insulation Conference, virtual event, 2021-06-07 - 2021-06-28
Keywords: Kraft paper, Thermal aging, DP, Mineral oil

Identifiers

Local EPrints ID: 450882
URI: http://eprints.soton.ac.uk/id/eprint/450882
PURE UUID: 63295ae0-9f18-47e4-bad5-ad3f7f9d9618
ORCID for Ian Hosier: ORCID iD orcid.org/0000-0003-4365-9385

Catalogue record

Date deposited: 18 Aug 2021 16:30
Last modified: 19 Aug 2021 01:38

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Contributors

Author: Ian Hosier ORCID iD
Author: Paul Lewin
Author: Gordon Wilson

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