The bus size of confluence aluminum in a substation is 63mm-8mm, the skin effect coefficient Ks-1.03....
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The bus size of confluence aluminum in a substation is 63mm-8mm, the skin effect coefficient Ks-1.03. Under normal operation, the temperature of bus is 0-50°C ,and cutting time of short circuit is tk-2.6s, short circuit I" 15.8KA, I1.3=13.9kA, I2.6-12.5kA. The equivalent time of the aperiodic component is 0.05s. (Note: In case of short circuit operation, The allowable tempurature of hard aluminum can be 200°C) (1) Why to do short-term heating calculation? (3points) (2) When selecting a disconnector, do you need to select or check it according to the rated breaking current? And why? (6 points) The bus size of confluence aluminum in a substation is 63mm-8mm, the skin effect coefficient Ks-1.03. Under normal operation, the temperature of bus is 0-50°C ,and cutting time of short circuit is tk-2.6s, short circuit I" 15.8KA, I1.3=13.9kA, I2.6-12.5kA. The equivalent time of the aperiodic component is 0.05s. (Note: In case of short circuit operation, The allowable tempurature of hard aluminum can be 200°C) (1) Why to do short-term heating calculation? (3points) (2) When selecting a disconnector, do you need to select or check it according to the rated breaking current? And why? (6 points) The bus size of confluence aluminum in a substation is 63mm-8mm, the skin effect coefficient Ks-1.03. Under normal operation, the temperature of bus is 0-50°C ,and cutting time of short circuit is tk-2.6s, short circuit I" 15.8KA, I1.3=13.9kA, I2.6-12.5kA. The equivalent time of the aperiodic component is 0.05s. (Note: In case of short circuit operation, The allowable tempurature of hard aluminum can be 200°C) (1) Why to do short-term heating calculation? (3points) (2) When selecting a disconnector, do you need to select or check it according to the rated breaking current? And why? (6 points) The bus size of confluence aluminum in a substation is 63mm-8mm, the skin effect coefficient Ks-1.03. Under normal operation, the temperature of bus is 0-50°C ,and cutting time of short circuit is tk-2.6s, short circuit I" 15.8KA, I1.3=13.9kA, I2.6-12.5kA. The equivalent time of the aperiodic component is 0.05s. (Note: In case of short circuit operation, The allowable tempurature of hard aluminum can be 200°C) (1) Why to do short-term heating calculation? (3points) (2) When selecting a disconnector, do you need to select or check it according to the rated breaking current? And why? (6 points) The bus size of confluence aluminum in a substation is 63mm-8mm, the skin effect coefficient Ks-1.03. Under normal operation, the temperature of bus is 0-50°C ,and cutting time of short circuit is tk-2.6s, short circuit I" 15.8KA, I1.3=13.9kA, I2.6-12.5kA. The equivalent time of the aperiodic component is 0.05s. (Note: In case of short circuit operation, The allowable tempurature of hard aluminum can be 200°C) (1) Why to do short-term heating calculation? (3points) (2) When selecting a disconnector, do you need to select or check it according to the rated breaking current? And why? (6 points)
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The skin effect coefficient Ks is 103 Under normal operation the temperature of bus is 850C and cutt... View the full answer
Related Book For
Fundamentals of Heat and Mass Transfer
ISBN: 978-0471457282
6th Edition
Authors: Incropera, Dewitt, Bergman, Lavine
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