Temporary power box 100/120m away from the power feed point

Yes, it still triggers and you have to ring the bell - and the three-phase socket is usually not protected by an individual RCD. Which would of course make sense...

Therefore, go before the RCD and that's fine.

Two RCDs are now required anyway - separation of lighting and power I only read recently and I think it's very smart.

We obtained our construction power from an electricity pole on our property. The neighbors from the pole on the street or from another neighbor.