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); German version EN 60255-21-3:1995— 11 стр.
Electrical relays - Part 21: Vibration, shock, bump and seismic tests on measuring relays and protection equipment; section 2: Shock and bump tests (IEC 60255-21-2:1988); German version EN 60255-21-2:1995— 9 стр.
Electrical relays - Part 21: Vibration, shock, bump and seismic tests on measuring relays and protection equipment; section 1: Vibration tests (sinusoidal) (IEC 60255-21-1:1988); German version EN 60255-21-1:1995— 7 стр.
