CCSN Power: domestic voltage class division, voltage list of countries around the world
1. Classification of domestic voltage levels
Division of voltage levels (domestic): low voltage, high voltage, extra high voltage, ultra high voltage, high voltage direct current, ultra high voltage direct current
Low voltage (domestic): the AC voltage is a voltage level with an effective value of 1KV and below
High voltage (domestic): The AC voltage is a voltage level with an effective value of 1KV and above and below 330kV
Ultra-high voltage (domestic): the AC voltage is a voltage level with an effective value of 330kv and above and below 1000kV
UHV (domestic): the AC voltage is a voltage level with an effective value of 1000kv and above
High-voltage direct current (domestic): The direct current voltage is a voltage level below the effective value of ±800kV
High-voltage DC (domestic): the DC voltage is a voltage level above the effective value of ±800kV
Medium voltage: voltage level from 1kv to 20kv.
Electrical equipment that can withstand this voltage level is called medium voltage electrical equipment. Above medium pressure, there are high pressure, ultra high pressure, ultra high pressure and other levels.
2. International Voltage Classification
Division of voltage levels (international): high voltage, extra high voltage, ultra high voltage, high voltage direct current, ultra high voltage direct current
High-voltage HVAC (international): the AC voltage is a voltage level with an effective value of 35KV and above and below 220KV
Ultra-high voltage EHVAC (international): the AC voltage is 330KV effective value and above 1000KV voltage level
Ultra-high voltage UHVAC (international): the alternating current is a voltage level with an effective value of 1000KV and above
High-voltage direct current HVDC (international): The direct current voltage is the voltage level of ±600kv and below the effective value
UHVDC direct UHVDC (international): the DC voltage is a voltage level above the effective value of ±600KV
Remarks: The effective value is to pass the DC current and the AC current respectively on the same resistance, and after one AC cycle, if the electric energy consumed by them on the resistance is equal, the magnitude of the DC current (voltage) is regarded as the AC current The effective value of (voltage), the effective value of sinusoidal current (voltage) is equal to 1/√2 of its maximum value (amplitude), about 0.707 times.
Voltage list of countries around the world
Source: Global Electrical Resources
Reprinted from Micro Energy Network
CCSN Power Inc. All Rights Reserved
Posted by: Zhang Jianlong
Reviewed and translated by: Kailon Chung