KS C IEC 60255-21-1-2022 Electrical relays-Part 21:Vibration, shock, bump and seismic tests on measuring relays and protection equipment-Section One:Vibration test(sinusoidal)
2022KS C IEC 60255-21-1-2022 Electrical relays-Part 21:Vibration, shock, bump and seismic tests on measuring relays and protection equipment-Section One:Vibration test(sinusoidal)
0000 KS C IEC 60255-21-1-2002(2017)
2002KS C IEC 60255-21-1:2002 Electrical relays-Part 21:Vibration, shock, bump and seismic tests on measuring relays and protection equipment-Section One:Vibration test(sinusoidal)