IEC 60071
IEC 60071
(OP)
In IEC 60071 ,why there are multiple values for one system voltage. For example for 220 Line.
System highest voltage = 245 KV
Short duration power frequency withstand voltage 360,395,460
Lightening withstand impulse voltage 850,950,1050.
May be silly question , As I am Civil engineer.
Thanks
Nitin Patel
System highest voltage = 245 KV
Short duration power frequency withstand voltage 360,395,460
Lightening withstand impulse voltage 850,950,1050.
May be silly question , As I am Civil engineer.
Thanks
Nitin Patel






RE: IEC 60071
The other two are test voltages.
The System could be exposed to overvoltage at rated frequency and from experience for each nominal [rated] level a system should be tested at a certain overvoltage in a limited duration.
The System has to withstand a lightning hit also. A standard form of lightning wave is used and a very high peak value is recommended for each system nominal voltage [Lightning Impulse Test].