Frank writes...
Sunday was a gorgeous day; the hot, humid weather that seems to have hung over Chicago for months finally broke and the day was practically cloudless with a high right around 70. The steam engine was running, there were Army soldiers on-site to work with our Track Department, and all the water from last weekend had disappeared with no obvious damage. What's not to like?
When I first arrived, I turned my attention to Indiana Railroad 205, which - for a project that's done - never quite seems to be done. Earlier in the summer we discovered an Ohio Brass trolley catcher of the type that's correct for this car, so Richard cleaned it up and painted it orange. It just took me forever to get around to putting it on the car. Above is what the car's been wearing; OB retrievers, which are significantly larger than what it actually had on IR (though close to what it had both earlier, on Interstate, and later, in Portland).
And here it is with the correct OB catcher installed. This is the west end of the car; the east end of the car still has the incorrect OB retriever, but if we can get our hands on the correct-type catcher at some point then that will be put on the car. Fingers crossed.
After that I happened upon Good Nick, who was over at 50th Avenue working on getting the platform lights working. This is a long-running project; the station platform was completely rebuilt maybe ten years ago, but before that we believe that wiring issues meant the platform lights hadn't been used for a while. It's possible that it's been as long as 20 years since the platform lights were lit. But earlier this year a plan was finally approved for rewiring them to run off of the 600 volt DC line, as they would have originally, and over the summer the car shop guys have been steadily fixing up the components needed. Nick started working on the project and before long a whole group of us had joined in. Here, Nick is on the left and Greg on the right, securing some of the last "crooks" into place.
Once a few final brackets were installed to hold the crooks in place, we needed to run a few ground wires through them using a fish tape; all of the other wiring had already been run. This took longer than expected but once it was done we were ready to start installing the shades and fixtures, which go inside the shades. Above, Jeron (left) and Rich are shown along with a shade that has had the fixture installed. Each fixture has two light sockets which are on different circuits. These use street railway bulbs, since they run on 600 volts. Not shown is Bob Sundelin, who also helped on the project, and Max, who stopped by briefly to make sure we could correctly answer the question "how long is a piece of wire?"
Almost all of the crooks face away from the station house, but the four closest to the station alternate. Richard explained to me why that is: there are supposed to be wind breaks, basically just wooden slat walls, in between two of these pairs of posts, and the crooks face away from the wind breaks. I suppose those wind breaks will be the next thing to be installed on the platform once the lights are done.
Here's one of the lights, complete with its shade and fixture, wired in, and with light bulbs installed.
By the time everyone finished, around 7pm, it was starting to get dark but all of the lights had been wired in - including not only the platform lights but also some lights inside the station house and one fixture over the entry steps. The only things left to do are to connect some ground wires underneath the platform and then wire in the switch board, where the 600 volt feed will come in and where the big light switches will be located. The hope is that the lights may be working on Saturday for Member's Day, when we typically have night operations for museum members. If so it should be a pretty impressive display.
PUBLIC SERVICE ANNOUNCEMENT: Right now the 36 and 309 are scheduled to operate on Saturday, but this may not happen! Why not, you ask? Because we don't have a conductor! Please contact Jim West to sign up if you are free on Saturday and would be interested in helping out.
I thought IRM's nominal voltage is around 700V due to the transmission voltage and transformers available. Normally I have seen 5-light combinations of bulbs for 600v (120 across each bulb), but did the restoration of 50th Ave accounted for this and omitted the three-light fixtures and just kept 2-light fixtures (3-sets of 2 instead of a 2 and a 3-light fixture)? Just curious.
ReplyDeleteO. Anderson
Out of curiosity, why did they go with a 600V DC system, requiring special (and presumably increasingly harder to get) bulbs, insulation, and switching equipment when pretty much the same visual effect could have been obtained with normal 120V AC equipment?
ReplyDeleteC Kronenwetter
Out of curiosity, why did they go with a 600V DC system?
ReplyDeleteIf by "they" you mean the Metropolitan West Side Elevated, which built the station, then I'd guess that they used 600v DC because that's what was available right there trackside and that's what they were used to. I'll bet that the Met had a whole lot more 600v DC bulbs sitting around than 120v AC bulbs.
If by "they" you mean IRM, then see above - it's what is correct for the station! It will be neat - not to mention authentic - to see the lights dim as a train pulls out.
And Olin, what's in the station is what was in it originally. I would have said that IRM's nominal voltage is somewhere in the 650v range at the substation and lower further away, so I'd assume 50th Ave isn't too terribly far off 600v. Others in the Car Department will know better than I do though.
Olin- The voltage from Rectifier 33 at no load is within a couple percent of 600v. This rectifier normally feeds everything on the property and the mainline west of the substation. (Rectifier 22, normally feeding the east mainline, runs about 670v.) Either rectifier can feed either or both power sections if needed, however.
ReplyDeleteCharles- Think of where and when the station was built. There was no 120vAC in the station. "Normal" has a different meaning for a station in the middle of a railroad in 1910. The bulbs were 120v street railway bulbs, which the transit companies used by the thousands in cars. The insulation isn't much different from what would be expected for 120v wiring. The switching equipment was rotary snap switches, of the type used in electric cars.
R. W. Schauer
Thanks all for the feedback. I have seen 2 and 3 light fixtures at L stations, as well as a fixture with 5 bulbs in it, so that is why I asked. Perhaps the 670 V rectifier fed the entire RR when I was an operator out there - as that seems to be what I recalled.
ReplyDeleteO.
Olin- 50th Ave. station has both 2 and 3 light fixtures. A 5 bulb cluster would only be used when there weren't other fixtures nearby to put in series with it. You can see one in front of the bay window at the depot. And yes, Konsbruck's rectifier fed the whole place until about 2007; see R&W 217, p. 13.
ReplyDeleteR. W. Schauer