KS C IEC 60255-21-3-2022 Electrical relays-Part 21:Vibration, shock, bump and seismic tests on measuring relays and protection equipment-Section 3:Seismic tests
2022KS C IEC 60255-21-3-2022 Electrical relays-Part 21:Vibration, shock, bump and seismic tests on measuring relays and protection equipment-Section 3:Seismic tests
0000 KS C IEC 60255-21-3-2012(2017)
2012KS C IEC 60255-21-3:2012 Electrical relays-Part 21:Vibration, shock, bump and seismic tests on measuring relays and protection equipment-Section 3:Seismic tests