C Factor of ETAP Short Circuit Current Calculation-IEC Standard In this group of ETAP, youspecify if the maximum or minimum short circuit current to be calculated andbased on the selection, different c factors will be used to modify sourcevoltage. There are three options available: Max, User-Defined c Factor, andMin. When the Max option is selected, the maximum values for c factor is usedto calculate maximum fault current:
C Factor of ETAP Short Circuit Current Calculation-IEC Standard
In this group of ETAP, youspecify if the maximum or minimum short circuit current to be calculated andbased on the selection, different c factors will be used to modify sourcevoltage. There are three options available: Max, User-Defined c Factor, andMin. When the Max option is selected, the maximum values for c factor is usedto calculate maximum fault current:
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Nominal Voltage Un
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Voltage factor c for the maximum fault current calculation
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< 1001 V
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c Factor = 1.10
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1001 to 35000 V
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c Factor = 1.10
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> 35000 V
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c Factor = 1.10
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When the User-Defined c Factor option is selected, ETAP uses theuser specified c factor. The ranges for the c factors are as follows:
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Nominal Voltage Un
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Voltage factor c for the maximum fault current calculation
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< 1001 V
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c Factor = 0.95 -- 1.10
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1001 to 35000 V
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c Factor = 1.00 -- 1.10
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> 35000 V
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c Factor = 1.00 -- 1.10
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When the Min. option is selected, the minimum values for c Factor,as defined in IEC 60909 Standard, are used to calculate minimum fault current.
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Nominal Voltage Un
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Voltage factor c for the maximum fault current calculation
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< 1001 V
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c Factor = 0.95
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1001 to 35000 V
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c Factor = 1.00
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> 35000 V
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c Factor = 1.00
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In each case, ETAP calculates ip, I"k, and Ik .
