- Tytuł:
- Impact of increased temperature of lower end-fitting of a composite long rod insulator on its mechanical strength under variable loads
- Autorzy:
-
Bielecki, Jerzy
Kotowski, Piotr
Wańkowicz, Jacek - Powiązania:
- https://bibliotekanauki.pl/articles/24202743.pdf
- Data publikacji:
- 2023
- Wydawca:
- Polska Akademia Nauk. Czasopisma i Monografie PAN
- Tematy:
-
composite suspension line insulators
high temperature low sag
HTLS
conductor
mechanical insulator strength
material fatigue
insulator tests
cyclic load
changing load - Opis:
- This paper describes results of tensile mechanical strength testing of two types of composite suspension line insulators from two manufacturers. In order to take into account the operation of composite insulators in overhead transmission lines with high-temperature low-sag (HTLS) conductors, the testing of their static and fatigue strength was performed at both ambient and elevated temperatures. The results showed that the static mechanical strength of composite insulators decreased with an increase in the temperature of the lower end fitting of the insulator, and proved that it followed a third-degree polynomial function. Calculations performed demonstrated that a significant cause of reduction in strength was the increase in the radial stress following the temperature increase in the crimped glassepoxy resin core of the insulator. The results of the fatigue strength testing demonstrated that the increase in the temperature of the lower end fitting of the insulator up to 85°C degree had a little effect on the fatigue strength of the tested composite insulators.
- Źródło:
-
Archives of Electrical Engineering; 2023, 72, 2; 392--405
1427-4221
2300-2506 - Pojawia się w:
- Archives of Electrical Engineering
- Dostawca treści:
- Biblioteka Nauki
Artykuł