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How to calculate the IDMT Curves for MiCOM and SEPAM relays

Published date: 24 August 2020

Need to know how to calculate the IDMT curves for the MiCOM and SEPAM relays

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Tripping IDMT Curves 

Attached are the two tools to calculate the IDMT Curves for the all the MiCOM and all the SEPAM relays.
Note: The tools are not interchangeable.  Unprotect sheets to work with formulas.  Charts are not included.

Conversion of TMS (Time Multiplier Setting) to Time delay (seconds):



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