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I get the following note:
Note 38344: Undefined transfer admittance when considering non-transmission line mode currents. Assume transfer admittance to be zero.
What does this mean?
When the Combined MoM/MTL method is used, the outer cable problem is solved with the MoM, which allows us to define cable paths far away from any ground/return path and hence in these cases non-transmission line mode currents can exist. Transfer admittance quantity is typically calculated as a function of capacitance w.r.t ground (also requiring height above ground), which becomes unknown/cannot be computed if the cable is defined along an arbitrary path.
In the case that a user selects to use either a Kley shield or a user-defined shield, we either have formulas to compute Yt or it was specified. Note 38344 basically then states that Yt does not make sense in this case and will be ignored in the cable calculation phases.
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