IEC 60949 outlines the mathematical formulas used to calculate the thermal effects of a short-circuit. It specifically focuses on the permissible short-circuit current for components where the heating effect is assumed to be adiabatic (meaning no heat escapes the component during the fault). Core Focus Areas
IEC 60949 is a critical standard for ensuring the safety and performance of electric cables, wires, and cords. Our exclusive agreement with the IEC allows us to offer a free PDF download of the standard. By following the steps outlined in this article, you can access the PDF download and benefit from the convenience, ease of reference, and cost savings. Remember to always verify the authenticity of any PDF download and only access it from authorized sources to ensure compliance with copyright laws and regulations.
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IEC 60949 applies to:
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cap I sub cap A cap D end-sub equals the fraction with numerator cap K cross cap S and denominator the square root of t end-root end-fraction cross the square root of l n open paren the fraction with numerator theta sub f plus beta and denominator theta sub i plus beta end-fraction close paren end-root : Cross-sectional area of the conductor ( m m squared : Duration of the short circuit (maximum 5 seconds). : Initial and final temperatures ( raised to the composed with power cap C : Material-dependent constants for copper or aluminum. Non-Adiabatic Effects
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