how can i Increase the maximum limit for loaded chunks?

No Tutorial in the internet helps me out.
(on a Server)

Yes

I'm guessing you mean how to increase the maximum for FTB Utilities?

https://www.curseforge.com/minecraft/mc-mods/ftb-utilities/pages/ranks/config

Ranks/Config - Ranks - Pages - FTB Utilities - Mods - Projects - CurseForge

Thanks for your halp i don´t found this page....

Sure thing.