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20 May 2013 | IET London: Savoy Place, UK
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8 - 10 April 2014 | Midland Hotel, Manchester, UK
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Topic Title: Primary Transformer Protection Topic Summary: Breaker Sizing Created On: 30 November 2012 01:47 AM Status: Post and Reply |
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 30 November 2012 01:47 AM
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Hi guys,
How to size the breaker for the primary transformer beside the normal formula?, i believe there are several factor to be considered beside the input current based on I=KVA/(1.732*V) |
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30 November 2012 05:31 AM
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Hi,
Important aspects are short-circuit interrupting rating (symmetrical/asymmetrical) and short-circuit withstand ratings (including duration). Fault levels shall be evaluated at the point of breaker location to define these requirements. Regards, |
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30 November 2012 06:06 AM
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How about another factor in determine the nominal current?..such as inruah current factor?
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Primary Transformer Protection
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