Sikringsskabet står herinde.

Yes. Danish, like German, very often makes compound nouns by writing them as a single word.

Here, the parts are:

• sikring = fuse / safety device
• skab = cabinet / box / cupboard

So sikringsskab is literally something like fuse-cabinet or fuse box. In Danish, this is normally written as one word, not two.

That s is a very common linking s in Danish compounds.

So:

• sikring
  • skab → sikringsskab

The s does not usually change the meaning by itself; it mainly helps connect the two parts. English learners often look for a separate grammatical reason for it, but in many compounds it is just the normal form you have to learn.

In Danish, the is often added to the end of the noun instead of being a separate word in front.

So:

• et skab = a cabinet
• skabet = the cabinet

And with the compound:

• et sikringsskab = a fuse box
• sikringsskabet = the fuse box

So the -et at the end is doing the job of English the.

Because the last part of the compound is et skab, and skab is a neuter noun in Danish.

For singular definite nouns:

• common gender nouns usually take -en
• neuter nouns usually take -et

Since the main noun here is skab, the compound follows that pattern:

• et skab → skabet
• et sikringsskab → sikringsskabet

The gender of the whole compound is decided by the last part.

Danish often uses a position verb where English would just use to be.

Common ones are:

• stå = stand
• ligge = lie
• sidde = sit

So Sikringsskabet står herinde sounds more natural and more physical than just saying it is here. It suggests the fuse box is in an upright or placed position.

In everyday Danish, this is very common. English says The fuse box is in here, but Danish often prefers something more like The fuse box stands in here.

Står is the present tense of stå.

Some useful forms are:

• infinitive: stå = to stand
• present: står = stands / is standing
• past: stod = stood / was standing
• past participle: stået = stood / been standing

So in this sentence, står means stands or, more naturally in English, is located.

Herinde means in here.

It is built from:

• her = here
• inde = inside / in

So herinde is more specific than just inde. It tells you the location is inside here, in this place/room/area.

You can sometimes say inde, but herinde is clearer when you want the meaning in here rather than just inside.

This is a normal Danish main-clause word order:

• Sikringsskabet = subject
• står = verb
• herinde = adverb of place

So the pattern is:

subject + verb + place

That is very common in simple Danish statements.

Yes. You can say:

Herinde står sikringsskabet.

That puts more emphasis on the location: In here is where the fuse box is.

But when you move something else to the front in a Danish main clause, the verb still has to stay in second position. That is the famous V2 pattern.

So:

• Sikringsskabet står herinde.
• Herinde står sikringsskabet.

Both are correct, but the emphasis is slightly different.