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Broadway went dark tonight it seems

Discussion in 'News' started by SteveB, Jul 13, 2019.

  1. SteveB

    SteveB Well-Known Member

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    No, nobody famous died.

    There was an electrical outage early in the evening, still going on, took out a huge chunk of the Broadway district (pretty much ALL of the district, plus Lincoln Center area. Manhole underground electrical distribution went up in flames.

    Besides the fact that Times Square pretty much went dark, subways stopped, elevators got stuck, etc.... I’m guessing that 80-90 percent of B-Dway was dark as well. Lot of ticket income lost.
     

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  2. JohnD

    JohnD Well-Known Member Fight Leukemia

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  3. Footer

    Footer Senior Team Senior Team Premium Member

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    And the Mayor was in Iowa... missed the best chance to look like an executive possible.... instead Cuomo got to.
     
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  4. tjrobb

    tjrobb Well-Known Member

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    Coincidentally, in the city I call home. It's always fun when this happens...
     
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  5. JD

    JD Well-Known Member

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    Media never gives us the gory details! (following from a closed industry forum) Specifically, a transformer in the >100MVA class used to drop HV to MV shorted one of it's windings and decided to turn all that power into heat. It immediately turned all it's oil into vapor and ignited it. Unfortunately, as the substation was underground, the resulting explosion and fire took out the needed control lines that would have allowed a backup to be brought online. Fire had to be put out and other equipment cleaned before #2 could be brought online.
    Sample winding short on similar transformer: (From autopsy. This one did not ignite.)
    t1.jpg
     
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  6. SteveB

    SteveB Well-Known Member

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    Hmmm...... seems like a bad location for the control lines that enable you to switch to the backup. But it’s not like Con-Ed has a lot of choice in the vaults and space they have for an ever expanding need for power.
     
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  7. JD

    JD Well-Known Member

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    Each transformer has several CT windings that measure current. The control equipment will not allow you to bring on a second transformer that is in parallel unless it can confirm the first is off line. Sounds like the primary protection would not release based on the press release Con Ed put out. "After the "Fault" (read as exploding transformer) occurred"
    I personally love the "dialed back" press releases given out by utilities! They don't want people frightened by all that stuff that's right under there feet, or hanging from a pole above their heads! What was that they said back in 79 about TMI? Oh yea, "a cooling error."

    Picture below. Note how many CT monitor windings they use!

    hv-ct.jpg
     
    Last edited: Jul 16, 2019 at 12:13 PM
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