Seismic retrofitting of an HV circuit breaker using base isolation with wire ropes. Part 2: Shaking-table test validation. (1st September 2015)

• Record Type: Journal Article
• Authors: Alessandri, S.; Giannini, R.; Paolacci, F.; Amoretti, M.; Freddo, A.
• Is Part Of: Engineering structures. Volume 98(2015:Sep. 01)
• Page Start: 263
• Page End: 274
• Publication Date: 2015-09-01
• Subjects: HV equipment -- Circuit breaker -- Seismic isolation -- Wire rope isolators; Structural engineering -- Periodicals; Structural analysis (Engineering) -- Periodicals; Construction, Technique de la -- Périodiques; Génie parasismique -- Périodiques; Pression du vent -- Périodiques; Earthquake engineering; Structural engineering; Wind-pressure; Periodicals; 624.105
• DOI: 10.1016/j.engstruct.2015.03.031
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: Wire ropes isolators has been proposed for the seismic protection of HV circuit breakers. The dynamic behaviour of a 380 kV circuit breaker has been investigated by shaking table tests. The effectiveness of the proposed protecting system has been widely demonstrated Wire Ropes reduces approximately of 75% the maximum stress level in the ceramic column Abstract: This paper addresses the experimental characterisation of a base-isolation system for the seismic qualification, of High Voltage (HV) ceramic circuit breakers, in accordance with the European standard CEI EN 62271-207. The adopted solution is based on an innovative application of wire rope isolators. The results of a preliminary investigation of an HV circuit breaker, which was base-isolated with wire ropes, were previously illustrated in a companion paper in which the effectiveness of this isolation system was analytically demonstrated. To validate these results, a shake table test campaign has been performed that includes the performance analysis of two optimal isolation system configurations. The results, which are illustrated in this paper, show both the effectiveness of this isolation system and the reliability of the proposed FE model.