Erik E. Fair said: > Ah, one more on clocks based on grid frequency: > https://www.nationalgeographic.com/science/article/european-clocks-six-minutes > -late-serbia-kosovo-electricity-grid-spd Clive Blackledge mentioned one of Tom Scott's videos. Time sink warning. He's good. Interesting, not very nutty. YMMV. He's got one on that event: European clocks ran slow for a bit. British clocks didn't. https://www.youtube.com/watch?v=bij-JjzCa7o 4 minutes He has several others that are time related. How does Britain know what time it is? https://www.youtube.com/watch?v=yqciKS_N0K8 5 minutes. NPL's MSF/Anthorn at 60KHz. Why Denmark used to be .04 seconds behind the world https://www.youtube.com/watch?v=yRz-Dl60Lfc 7 minutes. Legally, Denmark was still on solar time. Peter Reilley said: > In the plants that I installed they had a synchroscope and two light bulbs. > The both performed the same function. Here is a video of starting a hydro plant: (Lots of moving dials and blinking lights and noise.) How to Start and Sync a 400,000 Watt Turbine Hydroelectric Generator https://www.youtube.com/watch?v=xGQxSJmadm0 8 minutes. (audio says 350 kW.) GEO Badger said: > People were happy to have power. Though as was stated before, very > out-of-sync- will destroy a generator. I can picture that sort of disaster, probably because somebody told me about it when I was young and had a good imagination. The idea stuck in my head has the housing, including the concrete pad, neatly turned sideways, rotating 90 degrees around the main shaft connecting the turbine to the generator. When was the last recorded disaster of that nature? Any writeup? (or photos or video) -- These are my opinions. I hate spam.

Hi > On Mar 24, 2024, at 2:01 PM, Hal Murray via time-nuts <time-nuts@lists.febo.com> wrote: > > > Erik E. Fair said: >> Ah, one more on clocks based on grid frequency: >> https://www.nationalgeographic.com/science/article/european-clocks-six-minutes >> -late-serbia-kosovo-electricity-grid-spd > > Clive Blackledge mentioned one of Tom Scott's videos. > Time sink warning. He's good. Interesting, not very nutty. YMMV. > > He's got one on that event: > European clocks ran slow for a bit. British clocks didn't. > https://www.youtube.com/watch?v=bij-JjzCa7o > 4 minutes > > He has several others that are time related. > > How does Britain know what time it is? > https://www.youtube.com/watch?v=yqciKS_N0K8 > 5 minutes. NPL's MSF/Anthorn at 60KHz. > > Why Denmark used to be .04 seconds behind the world > https://www.youtube.com/watch?v=yRz-Dl60Lfc > 7 minutes. Legally, Denmark was still on solar time. > > > > Peter Reilley said: >> In the plants that I installed they had a synchroscope and two light bulbs. >> The both performed the same function. > > Here is a video of starting a hydro plant: > (Lots of moving dials and blinking lights and noise.) > How to Start and Sync a 400,000 Watt Turbine Hydroelectric Generator > https://www.youtube.com/watch?v=xGQxSJmadm0 > 8 minutes. > (audio says 350 kW.) > > > > GEO Badger said: >> People were happy to have power. Though as was stated before, very >> out-of-sync- will destroy a generator. > > I can picture that sort of disaster, probably because somebody told me about > it when I was young and had a good imagination. The idea stuck in my head has > the housing, including the concrete pad, neatly turned sideways, rotating 90 > degrees around the main shaft connecting the turbine to the generator. > > When was the last recorded disaster of that nature? Any writeup? (or photos > or video) Would that sort of dramatic event even happen? Fuses do exist and they sometimes do blow. There are a variety of similar “protection” approaches (shear pins ….) that could get designed in. Does the fuse blow before some level of damage is done? It's very much a “that depends” sort of thing. You can do a *lot* of damage (= destroy the generator) without it being very obvious from the outside. Bob > > > > -- > These are my opinions. I hate spam. > > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe send an email to time-nuts-leave@lists.febo.com

On 3/24/2024 2:01 PM, Hal Murray via time-nuts wrote: > > GEO Badger said: >> People were happy to have power. Though as was stated before, very >> out-of-sync- will destroy a generator. > I can picture that sort of disaster, probably because somebody told me about > it when I was young and had a good imagination. The idea stuck in my head has > the housing, including the concrete pad, neatly turned sideways, rotating 90 > degrees around the main shaft connecting the turbine to the generator. > > When was the last recorded disaster of that nature? Any writeup? (or photos > or video I was part of the crew that worked on the wreck of the turbine at the first nuclear plant at Shippingport Pa back in 1974.   One of the turbine disks split in half while the turbine was running at speed.   The turbine casing held but the bolts that stitched the two casing halves together stretched and some broke.   The reactor was not affected. Large steam turbines and their generators are mounted on a steel structure that is separate from the power plant building.   There is generally about an inch gap in the floor between the turbine support and the building structure.   This is to separate the vibrations of the turbine from the building. Shippingport was completed in 1957 and the turbine support was made using rivets and steel beams like old bridges. When the turbine let loose it shook the mounting structure so hard that the rivets moved around so much that they pealed off 1/4 inch of the paint around them.   I was impressed!