Hochbeschutzungen – oben offen – dürfen nicht übergriffen werden.

German to Swedish Tech/Engineering Mechanics / Mech Engineering ISO 12100-1 (?)

I came across this scentence in a german text. The content is security during service and repairing the equipment. I don't find the word hochbeschutzung anywhere, but assume it could be some kind of connection for ventilation or so.
Pls advice