The standard categorizes alternating current (AC) voltages into specific ranges to standardize equipment manufacturing and utility distribution: Low Voltage (LV):
| Column | Meaning | Example | |--------|---------|---------| | | The nameplate value | 230 V | | Max. equipment voltage (rms) | What insulation must survive | 253 V | | Frequency | 50 or 60 Hz region | 50 Hz | | Tolerance | Allowed variation | +10% / -6% | iec 60038 standard voltages pdf 103
Sometimes, engineers share scanned PDFs with filenames like IEC60038_P103.pdf (meaning page 103). Page 103 of an older version might contain the or the relationship between nominal voltages and equipment insulation . This section details the highest voltage levels for
This section details the highest voltage levels for equipment (Um), including the standard values for 300 kV, 400 kV, 500 kV, 750 kV, and the rarely used 1,200 kV. Page 103 often contains a table showing the relationship between rated voltage (Un) and highest voltage for equipment (Um), along with insulation coordination notes. and the rarely used 1