the switch is located on the Trafoseite behind the HV fuse-links.

Have a quick release with you all Trafoschalter?

So I until now still no plant built without Aüslösung by the backup, regardless of whether EnBW, RWE, Eon, or anybody.
But I have never used these short closing in one of our facilities.
In any facility still seen only normal earthing switch,.

If these short closing is activated in case of overload, but the backup still does not fire, then they throw at the latest. And if then the trigger does not work or is jammed, then good night.

From a capacity of 1200 kVA installed it Yes, circuit breakers, which are to avoid an overload.
Can you ask at what operators you work or where you are?
The earthing switch the 3 phases are grounded and necessarily at the same time shorted.
This is the capacitive permanent after a shutdown and / or induced voltage to Earth derived from adjacent cables and short-circuited with each other.
The same is achieved by grounding cables.
This has nothing with HV fuse-links, to do transformer protection or similar. It prevents the formation of stress of disconnected systems / cells (capacitive and / or inductive) and protects against accidental switching on the workers working there.
1970s Cologne-Kalk, restarting a 110kV cell when grounding switch is closed... within 1 km radius heal almost any disc.

Power line - through or drilled

I have a problem once testing jobs  and hope that it turns out to be not too bad...
Actually I was planning to install a shelf in the kitchen. Unfortunately, it has at the drill a small bang incl. Flash given and flew out the fuse. I so cleansed again the fuse to the fuse box, and the borehole into the phase tester to verify if current is flowing or not. Was probably not a good idea and can end may perhaps also badly! The phase Tester was to again blast, Flash, fuse out, etc black and somewhat smaller than before
So, I assume that the on or drilled through line is a power line?
Now also the (possibly stupid) question whether I strongly a electrician for repair should call or whether it is enough to to filling the hole would be nothing again.
I hope to get the one or two useful answer here.
If I am wrong in this thread, please move.
Call specialist and management rep. Everything else is bungling and dangerous
The voltage Tester is not short-circuit proof, therefore the looks, how he looks now.
Most are so cheap material to bend if you a wants to go to screw so eh.
Call professional, backup let out that long (fire hazard).
He was talking about a phase tester. The devices are not suitable. A voltage test is up to 1000 Volts pin 2.
I know what he meant, thats just the vernacular which sneaking up there, because with the phase Tester you can test Yes if a voltage is applied, if you necessarily want to do this with such a thing
D' around this thing well ever voltage Tester is called.
With a screwdriver, considering also no screws
That is also a screwdriver
Perhaps regional differences
We have also net here but Gliedermaßstab(Grad)metrisch ruler (with winkelfkt.)
How about a suitable detector?