LST EN 61166-2001 High-voltage alternating current circuit-breakers. Guide for seismic qualification of high-voltage alternating current circuit-breakers (IEC 61166:1993)
2001LST EN 61166-2001 High-voltage alternating current circuit-breakers. Guide for seismic qualification of high-voltage alternating current circuit-breakers (IEC 61166:1993)