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T12s in old Görlitz double-decker train

T12s in old Görlitz double-decker train

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20W T12 765 tubes in old double-decker train made by VEB Waggonbau Görlitz, still used in Poland, but only two complete 4-part sets are in working condition out of 473 sets (plus 57 single spare cars) delivered to Poland between 1959 and 1977. Originally interior was lit by 1m 25W tubes but during repairs lighting was converted to 20W tubes powered by transistor DC->AC RS gear with two 20W tubes connected in series. Old fluorescent fixtures were retained, only lampholders were moved closer to each other in order to fit to shorter 20W tubes and as two tubes are connected in series, only every second fixture has gear installed with wires going between fixtures.

DSC57490.JPG Clipboard01.jpg DSC64068.JPG DSC64095.JPG

Light Information

Light Information

Manufacturer:VEB Waggonbau Görlitz
Lamp
Lamp Type:fluorescent
Electrical
Wattage:20W
Optical
Color Temperature:6500K

File information

File information

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Filename:DSC64068.JPG
Album name:trojmiejski / Trains and trams
Keywords:Miscellaneous
File Size:397 KB
Date added:Jan 02, 2017
Dimensions:2465 x 1848 pixels
Displayed:138 times
URL:https://www.lighting-gallery.net/gallery/displayimage.php?pos=-129342
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Medved
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Jun 11, 2017 at 01:33 PM Author: Medved
I see there has been yet another modification before: Installing the fluorescents in place of the (really original, I guess) incandescent fixtures. The incandescent has its trace in the form of the circular patch on the ceiling panel...

No more selfballasted c***

trojmiejski
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Jun 11, 2017 at 01:59 PM Author: trojmiejski
Originally there was 25W fluorescent lighting powered from 24V DC -> 220V 500Hz rotary alternator and yes, there were incandescent fixtures where now there are those circular patches and they performed the role of emergency lighting in case of alternator failure. When fluorescent lighting was converted from 25W to 20W, new transistor DC->AC RS gear for two 20W in series used 24V directly so incandescent fixtures were removed as they weren't needed anymore.
Beta 5
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Jun 11, 2017 at 02:27 PM Author: Beta 5
What did the incandescent lights look like?
Were they the same as the one lit up on the left?

Thorn Beta 5 35W SOX 1965 - 2008. Top entry/Side entry

trojmiejski
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Jun 11, 2017 at 03:03 PM Author: trojmiejski
No, original Made in Germany lights looked like this:
http://www.lighting-gallery.net/gallery/displayimage.php?album=4353&pos=1&pid=134621
The type like the one on the left was Made in Poland and came in different variants, this one has refractor bowl, but equally often a milky opaque bowl was used. Those fixtures were commonly installed during the production of locomotives (as cab interior lighting), railway carriages (only in case of older types with 100% incandescent lighting, some of those with fluorescent compartment and corridor lighting had incandescent lighting in toilets and entrance vestibules but the fixture type was very different, more or less flat for 2 bulbs), electric motor units (EN57 cabs with 110V bulbs and toilets with 220V + 110V bulbs, 220V main lighting powered from 220V 500Hz circuit and 8W 110V emergency) and trams (interestingly in trams only opaque bowls were used with the only 5 made trams of 802N type being the exception with refractor bowls).
kai
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Jun 24, 2017 at 12:24 PM Author: kai
@Medved: These cars have indeed been delivered with fluorescent lighting from the onset. It was back in the fifties quite an achievement, much praised, in another case emphasizing the 120 lux lighting level.

And I fear the number of two remaining sets in Poland is still better than here in Germany. The DBv, as they had been called here, disappeared already before 1995, and I don't know if any survived. Unfortunately I found no opportunity to take another ride on them in Poland...
trojmiejski
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Jun 24, 2017 at 12:48 PM Author: trojmiejski
Original 4-part DR set is in museum:
https://www.flickr.com/photos/130832358@N03/21458133553/
Some time ago a 2-part set was used in heritage trains but I don't know if it is still in working condition:
http://www.bahnbilder.de/bild/deutschland~wagen~doppelstockwagen-historisch/149594/hier-die-historische-doppelstockeinheit-von-der.html
http://www.bahnbilder.de/bild/deutschland~wagen~doppelstockwagen-historisch/149592/oberstock-der-historischen-dr-doppelstockeinheit-aus-goerlitz-viel.html
One heritage set is in Czech Republic, original 25W fixtures were replaced with 25W fixtures from some other scrapped car:
http://vagonweb.cz/fotogalerie/CSD/CSD_Bp.php
I'm not sure if there classic ones still in working condition in Romania, but on some routes there are used TE sets after heavy refurbishment (google TE Acvila).
While it is still possible to meet such set somewhere, it is a shame that all sets belonging to this different type of double decker were scrapped:
http://www.bahnbilder.de/bilder/potsdam-30483.jpg
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