What are the Standard Voltage Levels according to IEC 60038?

What are the Standard Voltage Levels according to IEC 60038?

This international standard IEC 60038 specifies nominal voltages for both AC and DC systems, assuring global uniformity, interoperability & safety.

This applies to low, medium, high, extra high, and Ultra high voltage (UHV) levels.

Designing AC & DC systems for public supply, industrial installations and equipment.

Scope

Public power supply systems

Industrial installations.

Equipment Design & Compatibility

Objective

Harmonize voltage levels worldwide.

Support safe and dependable grid planning.

Enable standardized equipment design.

Key Highlights

Standardized voltage ranges for LV, MV, HV, EHV, and UHV.

Coverage for both AC and DC systems.

Promotes worldwide interoperability. Improves overall system reliability.

Voltage Ranges Based on IEC 60038

Low Voltage (LV): 100 V - 1,000 V → Homes, offices, small industries

Medium Voltage (MV): 1 kV - 35 kV → Distribution networks, factories

High Voltage (HV): 36 kV - 230 kV → Regional transmission

Extra High Voltage (EHV): 245 kV → 800 kV → National grids and interconnections.

Ultra High Voltage (UHV): 800 kV → 1,200 kV for long-distance bulk transmission DC Voltages: 12 V to 220 V for telecom and control systems.

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