Passive protection devices for high-voltage equipment: Design procedures and performance evaluation
- Univ. di Napoli Federico II (Italy)
- ISMES s.p.a., Seriate (Italy). Div. Indagini Strutturali
- ENEL s.p.a., Milano (Italy). Centro di Ricerca Idraulica et Strutturale
A 420 kV High-Voltage Alternating Current Circuit-Breaker, a typical element of an open-air electrical substation, is considered. Experimental tests carried out on such a piece of equipment by ISMES, under ENEL support, clearly pointed out its inability to withstand the seismic qualification level of highest severity indicated by the standards. The design of a seismic isolation system for the switch-gear composed of spring units and dampers is developed in this paper, and the dynamic earthquake response of the isolated circuit-breaker is compared numerically to the one obtained without the seismic protection system. The remarkable reduction of stresses in the porcelain insulators are shown, evidencing that this occurs to the detriment of a certain increment of displacements at the top of the apparatus.
- OSTI ID:
- 403452
- Report Number(s):
- CONF-9508226-; ISBN 0-7844-0101-2; TRN: IM9651%%487
- Resource Relation:
- Conference: 4. U.S. conference on lifeline earthquake engineering, San Francisco, CA (United States), 10-12 Aug 1995; Other Information: PBD: 1995; Related Information: Is Part Of Lifeline earthquake engineering: Proceedings of the fourth U.S. conference; O`Rourke, M.J. [ed.]; PB: 823 p.; Technical Council on Lifeline Earthquake Engineering, Monograph number 6
- Country of Publication:
- United States
- Language:
- English
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