Thanks for pointing this out, I've fixed the tags now. Not sure what happened here as its been years. Might have been some copy/paste mistake at one point. The toll point changed direction back in 2020 as well, so may have been something there.

You need to provide proper changeset description. One letter or number is not acceptable.

Why did you change this? The motorway end sign is inside the tunnel.

Welcome to OSM. Please don't start with buss routes as they require route relations. They are not as easy to do as regular elements. I have reverted both of your edits because of many mistakes.

Should add that you can clearly see in images that the low side on the transformer is on the west side as the cable tie drops into the duct along the wall. If this was a 420/3000 transformer it would have both the high and low side terminals being big.

Statnett is currently planning to build a new station roughly 500m WSW of the old one to allow for 420kV and line upgrades.

Public documents by Statnett and aerials at norgeibilder.no that we can use in OSM. Latest image will be the one shown for the preferred layer in iD. The images clearly show the 420kV line drops down to the compact switchgear and then into the reactor at the back of the bay. Statnett applied for a new 300(420)/132 transformer back in 2020. In that doc it listed two 300/132 transformers and two reactors present. The 160MVar reactor and compact switchgear has been there since the station was built I believe. At least as long as the 420kV line has existed.

Only way to know for sure is to contact Equinor directly, but I'm not sure they would respond to such a question.

Cable rating and actual operating voltage is not the same. I believe they landed on 33kV to avoid having to do heavy modifications on the platforms. Space is already limited for power handling. It seems they landed on JDR Cable Systems to provide these 66kV cables. They are designed to break if there is a problem with the mooring of the turbines to avoid pulling on the rest.

It is most likely 33k internally and then transformed to 66kV for the cables to the platforms. No wind farm I know use more than 33kV from each turbine due to size of equipment. The generators are often 690V and then a transformer at the base ups this to 33kV.

Most articles quotes 33kV that I could find. Maybe that is just the internal cabling while the cables to the platforms are at 66kV.

Where did you get the transformer rating for Skagerak 4 transformer? Also DC voltage does not equal AC voltage after conversion.

Ahh, probably the classic left hand not knowing what the right is doing. I've seen varying values used for varying companies and documents even if it is essentially the same.

Where did you find the distribution voltage for this area? The voltage regulators on the distribution lines in the area says 7620V which would mean 13.2kV L-L voltage.

Please don't mess with the bus stops in Norway. They are updated automatically and we dont use the public transportation tags. Many of them don't even have a platform so the public_transport=platform tag is wrong.

Har no fiksa alle valideringsfeil i området. Ver så snill å ikkje lag meir krøll er du snill.

Trur du må stoppe og redigere landcover til du forstår relasjonar og kan bruke desse. Du er på veg å rasere heile området med masse feil.

This is not a 420kV transformer. It is connected to the 300 and 132kV and has a third winding at 17kV that used to be connected to some capacitor banks.

That voltage may not be accurate. The AC voltage after converting from DC to AC is never 1:1. That is why I removed it in my edit. You have to ask the operator or manufacturer as this will vary from station to station. The most common to use is 0.636 as the average and 0.707 for RMS. So most likely the voltage is around 500kV, but it still purely guesswork.

There are different school of thought here unfortunately. Some want a value for every possible tag instead of using a default value if missing. Tagging with every key and value available in OSM will lead to a lot of tags per object.