Primarily used for industrial networks and regional distribution. Common values include 3.3 kV, 6.6 kV, 11 kV, and 33 kV.
By establishing standard voltages, the IEC eliminates the chaotic variance of localized electrical systems. This standardization allows a manufacturer in one country to produce appliances, motors, or transformers that can be safely and reliably used in dozens of other countries without requiring custom modifications. 2. Core Voltage Classifications in IEC 60038 iec 60038 standard voltages pdf 103
): The value used to designate the system (e.g., 230 V or 400 V). iec 60038 standard voltages pdf 103
The actual voltage delivered at the terminal of the appliance or machine. Because of internal building voltage drops, equipment must be engineered to tolerate wider variations (often up to ) to prevent premature component failure. iec 60038 standard voltages pdf 103
