LST EN 60255-21-3-2001 Electrical relays. Part 21: Vibration, shock, bump and seismic tests on measuring relays and protection equipment. Section 3: Seismic tests (IEC 60255-21-3:1993)
2002LST EN 60255-21-3-2001 Electrical relays. Part 21: Vibration, shock, bump and seismic tests on measuring relays and protection equipment. Section 3: Seismic tests (IEC 60255-21-3:1993)