DS DS/EN 61166
DS DSEN 61166 1994-AUG-23 Hgh-voltage alternatng current crcut-breakers - Gude for sesmc qualfcaton of hgh-voltage alternatng current crcut-breakers
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This European Standard specifies seismic severity levels and gives a choice of methods that can be applied to demonstrate the performance of HV circuit breakers for which seismic qualification is required.