System Voltage Classes (ANSI)

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.

NEMA C58.1

Download:ANSI C84

About the Author

Ver Pangonilo
A Filipino Engineer, Registered Professional Engineer of Queensland (RPEQ) - Australia and Professional Electrical Engineer (PEE) - Philippines with extensive experience in concept select, front-end engineering, HV & LV detail design, construction and commissioning of Hazardous and Non-Hazardous Area electrical installations in water and waste water pipeline and pumping facilities, offshore platforms, hydrocarbon process plants and pipelines including related facilities. Hazardous area classification and design certification (UEENEEM015B, UEENEEM016B, UEENEEM017B).
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