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IEC-60076-5-2000.pdf
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IEC 60076 2000
Std.IeC 60076-5-eNgl 200048440910735092 2960076-5IEC:2000-3-CONTENTSPageFOREWORDClause1 Scope.2 Normative reference93 Requirements with regard to ability to withstand short circuit.93.1.General.3.2 Overcurrent conditions.114 Demonstration of ability to withstand short circuit.74.1 Thermal ability to withstand short circuit.174.2 Ability to withstand the dynamic effects of short circui.23Annex A(informative)Guidance for the identification of a similar transformer.41Annex B(normative)Calculation method for the demonstration of the abilityto withstand the dynamic effects of short circuit.3Figure 1-Star/delta connected transformer.29Figure 2-Star/star auto-transformer.31Table 1-Recognized minimum values of short-circuit impedance for transformerswith two separate windings.13Table 2-Short-circuit apparent power of the system.13Table 3-Maximum permissible values of the average temperature of each windingafter short circuit.21Table 4-Values for factor k x2.25Copyright por International Electrotechnical CommissionMon May 06 11:49:06 2002

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