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?

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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.

Released for: Schneider Electric United Arab Emirates

Attachment(s)

VIP 45 trip time calculation.pdf

[397.09 KB]

Published on:31/01/2017Last Modified on:29/07/2024

Range:

Quick Signal

Range:

Quick Signal

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