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How do I manage to calculate the actual relay trip time for phase overcurrent protection (ANSI 50-51) of self powered protection relay VIP 45?
The overall protection graph for Phase Overcurrent Protection (ANSI 50-51) is presented by multiple segments as follows:
Calculation of tripping time in terms of settings for each curve/segment can be summarized as detailed in attached file.
Calculation of tripping time in terms of settings for each curve/segment can be summarized as detailed in attached file.
Released for:Schneider Electric South Africa
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