Oh wow. I didn’t realize that the EN standard was written in a way that you’re not supposed to use SET to account for the cooling effect of higher air speed. I’ll admit that using the original PMV model at high air speeds feels a little bit like an abuse of the PMV model given that Fanger’s experiments didn’t do the best job of accounting for high air speeds. But who am I to judge.
If you want to work around the default use of SET that has been encoded in Ladybug Tools, you can use the LB PMV Comfort Parameter component to set the _still_air_thresh_ to a very high value. This effectively ensures that Fanger’s original model is always used to account for higher air speed and SET will never be used to establish the cooling effect.
Also, to your unrelated query (that is actually quite relevant), the default still air threshold used in Ladybug Tools is 0.10 m/s as per the most recent publication of ASHRAE-55.