I have been stopped by INDUSI system on 2000Hz track inductor which was right near the speed reduction warning sign. As far as I understood from the manual it should be 1000Hz inductor here. Please correct me if I'm wrong.
According to Wikipedia INDUSI is Pzb and the Romanian deployment is the I 60 version. Normally it is as you describe, but - I also think someone told me - you could encounter restrictions like that in the wild. Its feature is exactly what it does - you may pass it at no more than 25 kph while also pressing the Pzb Befehl equivalent (Del). There is a special case that is related to speed. I don't know this board but I read it as 50 in 500, which is relatively close. One advanced magnet behavior - explained here - involves activating the 2000 Hz for a short period of time to catch trains over a given speed. Thus if you pass this board too fast, you'll trip the brakes. The incident would be considered lacking route knowledge. Or - what the article literally says, protecting a signal ahead showing a high permitted speed, with you going even faster. All that said it might be a route building error, or a failed attempt of the above.
Thanks for the detailed reply! I did not know about this 2000Hz usage... So looks like you are right, either this or a bug. I guess we never know for sure. With INDUSI enabled you have to know the route very well, otherwise those stops can drive you crazy)
