When tagging AC/DC traction substations, I do frequency=50;0, which when matched with for example voltage=15000;3000 should indicate that 15kV is at 50Hz AC, while 3kV is DC.
With the newest frequency import as per #982, such dual frequency values throw a "NaN Hz, NaN Hz":
Any substation in Kraków, Poland will show this.
I would ask to look into displaying both frequencies. I think it far more appropriate to tag both frequencies, as leaving just frequency=50 would falsely indicate that the secondary (traction) voltage is also at 50Hz AC, which is as far from truth as you can get in such cases. (Well, technically the transformers are actually AC-to-AC and only then is there a rectifier unit involved of course, so there is 3kV AC involved, but it's never output anywhere.)
If it helps, I also try to adamantly tag such substations with frequency_conversion=ac_dc.
When tagging AC/DC traction substations, I do
frequency=50;0, which when matched with for examplevoltage=15000;3000should indicate that 15kV is at 50Hz AC, while 3kV is DC.With the newest frequency import as per #982, such dual frequency values throw a "NaN Hz, NaN Hz":
Any substation in Kraków, Poland will show this.
I would ask to look into displaying both frequencies. I think it far more appropriate to tag both frequencies, as leaving just
frequency=50would falsely indicate that the secondary (traction) voltage is also at 50Hz AC, which is as far from truth as you can get in such cases. (Well, technically the transformers are actually AC-to-AC and only then is there a rectifier unit involved of course, so there is 3kV AC involved, but it's never output anywhere.)If it helps, I also try to adamantly tag such substations with
frequency_conversion=ac_dc.