In ANSI C84.1-2011, Clause 3, system voltage classes were explained
- Low Voltage (LV)
- A class of nominal system voltages 1000 volts or less.
- Medium Voltage (MV)
- A class of nominal system voltages greater than 1000 volts and less than 100 kV.
- High Voltage (HV)
- A class of nominal system voltages equal to or greater than 100 kV and equal to or less than 230 kV.
- Extra-High Voltage (EHV)
- A class of nominal system voltages greater than 230 kV but less than 1000 kV.
- Ultra-High Voltage (UHV)
- A class of nominal system voltages equal to or greater than 1000 kV.
The voltage ranges in accordance with ANSI C84.1-2011 is shown in Table 1.
Download: