Here a single 22kV line from the subsation can run many 10's of mostly 400kVA transformers. (Well, lots of them are single transformers powering small stand-alone loads like a single farm or traffic lights etc, so the actual load is many times less than N*400kVA). I think a lost phase in some final branch, powering just 2..3 transformers won't even stand out in the measurement

Also, lets say you can discover the existence of such fault. Is it viable to cut the entire line from the substation due to this fault ? I.e. causing full downtime to 50 customers because 3 lost a phase ?

This issue was mitigated a while ago.
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This thread is 10 years old.

Can you tell me who is doing this?I hope it isn't me. I am very active though....

Ian Keder hosted the Gallery of lights.  He has his screen name here at @KEDER

He has not visited here for a few years

Preferably no LED. But if I have no choice, warm white.

As long as you keep the cathodes heated you can theoretically dim them as much as you want to. Older pre-electronic fluorescent fixtures had seperate heater transformers, which got powered by raw mains voltage. And then a large triac based dinner controlled the voltage going to the ballasts!

I regret not saving a few of those.

Yes, there were many single pin tubes. For more domestic use, they are more common in the united states in "slimline" form. But they are anything but slim, lol. Too long to be practical, easy to break by accident in transport due to their long lenght, but I'm sure they provide very nice light output!

Personally, I have about 40-45 20W TLX tubes from Philips that I got from a stock clean out a while ago. I have lit a few of them, they work sweet! They are colour 33, and the newer ones are marked 640, so the newer ones are also colour 33 interestingly. They provide very nice light output, and are super simple to use. You can run two in series on a 36W/40W choke! They strike without any starting aid thanks to their ignition strips. Each start is a cold cathode start, but they are built to take it. I can't remember how many startups they are specced for but I believe upwards of 10000 startups.

They also have a insanely long lifespan, if on continuously they can last for 30-40k hours.

I am slowly developing a fixture so I can enjoy some of them at home.

Not many rubbers fortunately, but only fluorinated elastomers like viton. Otherwise, until forcibly burned, viton is extremely stable and will not decompose under normal environment to any sensible amount of HF. It is even used widely in gaskets in sub-micron vacuum systems for this reason. So please do not spread this unfounded scare! Other rubbers decompose to some partially oxidated hydrocarbons, which remain pretty benign. Chlorinated rubbers may give some trace HCl but I bet it will evaporate and dissipate quickly and is not toxic in such minor amounts, your stomach sure has much more

Interesting… I was curious in case someone could ever make custom or rebuilds for trashed streetlights. Thank for your response!