What are the IEC voltage classifications ?

Electricity is a vital resource that powers our homes, businesses, and industries. To ensure the safety and compatibility of various electrical equipment and installations, the International Electrotechnical Commission (IEC) has developed voltage classifications. In this article, we will focus on the IEC voltage classifications and their significance in different applications.

The IEC voltage classifications are designed to standardize and categorize different levels of electrical voltage. The classification system is based on the maximum allowable voltage (MAU) and the effective voltage (EV) in volts per unit. The following are the IEC voltage classifications:

Low Voltage (LV):

Low voltage (LV) is a 50/50 VDC to 1000/1000 VDC voltage range. This category of voltage is associated with low-maintenance and low-cost equipment. Examples of devices that operate in this range include hand tools, small appliances, and low-power industrial equipment.

Medium Voltage (MV):

Medium voltage (MV) is a 1000/1000 VDC to 3600/3600 VDC voltage range. This category of voltage is associated with mid-range equipment that requires a moderate power supply. Examples of devices that operate in this range include computers, servers, and industrial machinery.

High Voltage (HV):

High voltage (HV) is a voltage range that exceeds 3600 VDC. This category of voltage is associated with high-power equipment that requires a high voltage power supply. Examples of devices that operate in this range include industrial machinery, transformers, and power plants.

The IEC voltage classifications play a significant role in ensuring the safety and compatibility of various electrical equipment and installations. By categorizing different voltage levels, manufacturers can design equipment that meets the necessary power requirements and minimizes the risk of electrical hazards.

In conclusion, the IEC voltage classifications are an essential tool for standardizing and categorizing different levels of electrical voltage. By ensuring that electrical equipment and installations are compatible with the appropriate voltage level, manufacturers can produce safe, efficient, and reliable products that meet the needs of a diverse range of customers.