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hosts community-uploaded calculation guides and partial documents specifically for IEC 60949. Combined IEC 60949 PDF is available on Scribd for online reading. iTeh Standards : Always verify with the latest official release from the IEC Search Portal
The standard provides a methodology for calculating the short-circuit currents that can be withstood by electrical equipment, such as cables, busbars, and switchgear, under various fault conditions. It takes into account non-adiabatic heating effects, which occur when the temperature of the equipment rises rapidly due to the high currents flowing through it. iec 60949 pdf free download exclusive
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The International Electrotechnical Commission (IEC) holds the copyright for IEC 60949. The revenue generated from standard sales funds the research, development, and global harmonization of electrical safety codes. Downloading unauthorized copies from third-party file-sharing sites violates intellectual property laws. Security Risks of Unauthorized Downloads
IEC 60949 applies to electrical cables, wires, and conductors with rated voltages up to 11 kV. The standard assumes adiabatic conditions for very short fault durations (less than 5 seconds). This means all heat generated by the short-circuit current remains trapped inside the conductor, causing a rapid temperature rise. iTeh Standards : Always verify with the latest
The required by your protective relays.
The general formula used to determine the permissible short-circuit current ( ) over a specific duration (