IEC/TS 61463 Ed. 1.1 b:2000, Bushings - Seismic qualification

Is applicable to alternating current and direct current bushings for rated voltages above 52 kV, mounted on transformers, other apparatus of buildings. It is accepted that for bushings for rated voltages less than or equal to 52 kV, due to their characteristics (resonance frequency greater than 25 Hz) seismic qualification is not required. Has the status of a technical report type 2.