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Thread: Metro Line - North LRT | Churchill to NAIT | Under Construction

  1. #8601

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    Quote Originally Posted by Barry N View Post
    Thales Canada had three major challenges on the Metro LRT Line but only two were technical, a senior official said Friday during one of the first times the company has talked publicly about its contract in Edmonton.

    http://edmontonjournal.com/news/local-news/thales-official-breaks-silence-to-say-not-all-metro-line-lrt-delay-is-on-them
    How can any system orientated maintenance shop allow anything like this to happen?


    “Plus, each train has been fixed and modified so many times over the years, not one is identical. They needed “a unique wiring diagram for every single train.”




    This should also raise major concerns about the procurement system and basic build of the units. Over their long lives the designers should assume that nearly every part will require repair or replacement so the idea that every fix had to solve a problem in any kind of unique way, may mean that they were all workarounds to deal with cars that were never designed for ongoing maintenance beyond routine scheduled maintenance.




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    Last edited by KC; 12-05-2018 at 12:04 PM.

  2. #8602
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    How many of us have cars more than 20 years old? Perhaps the city could retrofit the High Level and Fort Edmonton streetcars with CBTC technology.
    "Talk minus action equals zero." - Joe Keithley, D. O. A.

  3. #8603
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    After reading that Journal story I almost have some sympathy for Mr Thales. So all of the old cars have non standard wiring? And the city added all that extra work?
    They still, today, have an unregulated power supply, which means the on-board computer can’t get the consistent 115 volts you’d get from plugging into a normal power outlet today.

    “The voltage can vary quite widely,” he said. It was so bad, when they first hooked five 40-year-old trains together, the voltage swung so low that the brakes came on.“

    Time to hit the gong!

  4. #8604

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    So you can't get a $500 APC UPS to regulate the voltage?
    Advocating a better Edmonton through effective, efficient and economical transit.

  5. #8605

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    Quote Originally Posted by Edmonton PRT View Post
    So you can't get a $500 APC UPS to regulate the voltage?
    Hahahaha!!!

    Maybe a $15,000 APC (same unit though). The bidding process isn’t cheap.

    Then there’s the electrical engineering studies that would have to be done first.


    Then in keeping with tradition, each car would be done as needed over years to ensure each one is uniquely equipped.
    Last edited by KC; 12-05-2018 at 08:57 PM.

  6. #8606

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    You have to wonder how safe it is to have VOBCs installed without providing a constant voltage for them. It's a wonder they haven't had one of the suckers get fried yet.

  7. #8607
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    From the Journal article above:
    Edmonton’s Metro LRT line posed two major technical challenges to signals engineers — it has 13 at-grade crossings within three kilometres and required retrofitting 40-year-old trains with new technology. These challenges were underestimated.

    Going in, Thales had never applied its radio-signal based system to at-grade crossings. According to documents previously obtained by Postmedia, Edmonton officials identified that in their evaluation comments before awarding the bid.
    So City officials were aware of these challenges but awarded the contract anyway. We may be building an inferior street level system but at least it will have state of the art signalling must have been the mindset.

  8. #8608

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    Thales are the supposed experts in signalling and they said they could do it. It's not like they're "Bob's Rail Signalling Service" fro New Sarepta.

  9. #8609
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    Quote Originally Posted by Cumberland View Post
    You have to wonder how safe it is to have VOBCs installed without providing a constant voltage for them. It's a wonder they haven't had one of the suckers get fried yet.
    Suddenly I have a mental image of the exploding buses in Rome, Italy.

    https://www.theguardian.com/world/20...-investigation

  10. #8610
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    And think the Skytrain does it with PC or XT technology that still used floppy drives.
    https://www.theloop.ca/vancouvers-sk...-floppy-disks/

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