Before revision: In power distribution according to IEC 60038, low voltage (LV) is defined as voltages under 1 kilovolt (KV), medium voltage (MV) is defined as voltages from 1 KV to 35 KV, high voltage (HV) is defined as voltages from above 35 to 230 KV, and extra high voltage (EHV) is defined as voltages above 245 URL This is a definition that has changed over time and can change depending on the country and application.
After revision: In power distribution according to IEC 60038, low voltage (LV) is defined as voltages from 100 volts to 1 kilovolt URL medium voltage (MV) is defined as voltages from 1 KV to 35 KV, high voltage (HV) is defined as voltages from above 35 to 230 KV, and extra high voltage (EHV) is defined as voltages above 245 URL This is a definition that has changed over time and can change depending on the country and application.