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About This Item
Full Description
- Subclause 2.5 gives equations and examples for the calculation of the positive-, the negative- and the zero-sequence impedances and reduction factors for high-, medium and low-voltage cables with sheaths and shields earthed at both ends.
- Subclause 2.7 gives equations and figures for the calculation of the positive-sequence impedances of busbar configurations.
Document History
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IEC/TR 60909-2 Ed. 2.0 en:2008
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Short-circuit currents in three-phase a.c. systems - Part 2: Data of electrical equipment for short-circuit current calculations- Most Recent
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IEC/TR 60909-2 Ed. 1.0 b:1992
Electrical equipment - Data for short-circuit current calculations in accordance with IEC 909 (1988)- Historical Version