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TDD Calculator

Calculate a TDD Value for a Single Conductor


            Fault Isc (kA)  =                                     Isc/Il  =                                     TDD Range as per IEEE 519-2014 at PCC  =


Over and above the TDD Limits
a. Even harmonics on current are limited to 25% of the odd harmonic limits (Refer Table 2, 3 and 4 on IEEE-519-2014)
b. Current distortions that result in a dc offset are not allowed
c. For power generation equipment refer the IEEE-519 standard
d. Refer Table 5 for Recommended multipliers for increases in harmonic current limits
Above result is for indicative purpose only. Also refer country specific or local utility standard if applicable.


Calculate a TDD Value for a Two Different Conductors



            Fault Isc (kA)  =                                     Isc/Il  =                                     TDD Range as per IEEE 519-2014 at PCC  =


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