ION - Waterloo Region's Light Rail Transit

[Viewfromthe42]

"Facing the storm" is a very interesting choice of words for Bombardier.

[Canard]

It is, but they can handle it!

<blockquote class="twitter-tweet" data-lang="en"><p lang="de" dir="ltr">Morgens ziehen wir gerne ja mal ein paar Bahnen.<br><br>(?: Jero Wernicke) <a href="https://t.co/tYrYcVZHMT">pic.twitter.com/tYrYcVZHMT</a></p>&mdash; Weil wir dich lieben (@BVG_Kampagne) <a href="https://twitter.com/BVG_Kampagne/status/889746103863848960">July 25, 2017</a></blockquote>

(Bombardier FLEXITY LRV in Berlin)

[Viewfromthe42]

The thought of sending a train powered by high voltage through a foot (or whatever) of water doesn't sit quite right with me.

[Canard]

...agreed, yet it's actually very common!

[chutten]

There must be an electrical reason this is safe and not prohibited. I'm guessing it's essentially impossible for a circuit connection through the water to be preferred over the ground rail.

[jeffster]

There must be an electrical reason this is safe and not prohibited. I'm guessing it's essentially impossible for a circuit connection through the water to be preferred over the ground rail.

Don't think it's going to be allowed anymore.

That video took place in Portland, Oregon.

Here's the news report on that incident.

https://www.youtube.com/watch?v=gt6nJXOsWXk

[Canard]

Right, but it's not like it's prohibited because of some physical reason or electrical reason. It's prohibited because people got wet feet and annoyed them.

[KevinL]

So long as all the power delivery systems - the overhead wires, pantograph, onboard wiring - remain above the water, it's no different than in dry conditions.

[Canard]

Power returns through the tracks in the ground, Kevin!

[KevinL]

Yes! But it comes in from above, was my point.

[Canard]

So if the polarity of the contact wire and rails were reversed, it wouldn't work? I'm assuming the contact wire is negativley charged then, since electricity flows from - to +, right?

<blockquote class="twitter-tweet" data-lang="en"><p lang="en" dir="ltr">Progress at the King St. Grade Separation. Finishing touches; sidewalk/MUT for Friday! <a href="https://twitter.com/hashtag/wrLRT?src=hash">#wrLRT</a> <a href="https://t.co/wUqDbShdfY">pic.twitter.com/wUqDbShdfY</a></p>&mdash; Iain Hendry (@Canardiain) <a href="https://twitter.com/Canardiain/status/890335986324049920">July 26, 2017</a></blockquote>

Looks like they're on-track for Friday!

Opening ceremony is at 4pm; all are welcome to attend, as per Tom Galloway.

[KevinL]

So if the polarity of the contact wire and rails were reversed, it wouldn't work?  I'm assuming the contact wire is negativley charged then, since electricity flows from - to +, right?

Hey, you're the engineer.

[chutten]

Well, the charge of an electron is negative so they flow in the opposite direction of charge (ugh), so...

[tomh009]

Well, the charge of an electron is negative so they flow in the opposite direction of charge (ugh), so...

Well, the holes flow in the opposite direction! 

[Canard]

Hey, you're the engineer.

Absolutely not electrical, though!