Combined analysis and test of earthquake‐resistant circuit breakers
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Following the severe earthquake damage at San Fernando in 1971, it became of technical and perhaps psychological importance to demonstrate that properly re-designed electrical equipment is able to withstand even worse transient vibration phenomena which can be produced in an earthquake simulator laboratory. This has been accomplished for one column of a 500 kV gas circuit breaker and the test results are used to qualify the much larger original 3-column assembly by means of a computer-aided structural analysis. Since the equipment exhibited some closely spaced, cross-coupled modes of vibration, a valuable comparison could be obtained between the effects produced by El Centro 1940 ground acceleration and those for a more purposeful sine beat vibration input. The latter can be adjusted to produce definite stresses and fatigue effects in specific parts of the equipment due to quasi-resonance response.
[1] E. G. Fischer,et al. Comparison of fatigue effects in simulated and actual earthquakes , 1973 .
[2] A. P. Colaiaco,et al. Test Method to Demonstrate the Seismic Capabilities of Equipment , 1972 .
[3] John M. Biggs,et al. Introduction to Structural Dynamics , 1964 .
[4] Semih S. Tezcan,et al. Long distance effects of the 28 march 1970 gediz turkey earthquake , 1972 .