Industrial stuff like this is a little out of my league. It sounds very odd though, as that sort of resistance value would equate to 40-ish amps at 415V.
What's the rating of the fuse/CB feeding each cabinet? Could it be some sort of extra belt-and-braces safety circuit, intended to trip out the supply if it should somehow become energized even though the door is opened?
(Microwave ovens often have an extra door-interlock switch which puts a short on the supply downstream of the main switch, just in case it fails.)
