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Topic: 25kVAC

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	15kVAC - Wikipedia, the free encyclopedia
		In particular, the lower voltage reduced flashover problems in the motors, albeit at the cost of a non-standard line frequency requiring frequency conversion, and separate supplies.
		This voltage has been superseded by 25kVAC at 50Hz or 60Hz since the 1950s.
		Oddly, when Denmark decided to electrify in the 1970s they chose not to use 15kVAC which would have linked compatible systems in Germany and Sweden, but rather chose 25kVAC.
	en.wikipedia.org /wiki/15kVAC (142 words)

	Re: Near miss at Victoria (London)
		A 1.5kVDC spark would be lucky to jump half a centimetre under the same conditions.
		A 25kVAC supply turns off 100 times a second, extinguishing its own arc.
		A 25kVAC load of 250 kilowatts would be pulling 10 Amps.
	www.railpage.org.au /ausrail/01jan/msg01857.html (279 words)

	Transportation in Germany - Wikipedia, the free encyclopedia
		Since its privatization in 1994, Deutsche Bahn AG (DBAG) no longer publishes details of the tracks it owns; in addition to the DBAG system there are about 280 privately or locally owned railway companies which own an approximate 3,000 km to 4,000 km of the total tracks and use DB tracks in open access.
		Denmark - same gauge - voltage change 15kVAC / 25kVAC
		France - same gauge - voltage change 15kVAC /( 25kVAC or 1500VDC).
	www.wikipedia.org /wiki/Transportation_in_Germany (350 words)

	House of Commons - Environment, Transport and Regional Affairs - First Report
		Barring 25kVac Classes 313 and 319 was specifically contrary because both are designed to work in long tunnels with passenger platforms.
		Heathrow Express is 25kVac whereas the whole area is third and fourth rail.
		The South and West Transport Action Group has at T5I called for tunnels exceeding 7 m diameter (for maintenance staff to reach lineside apparatus when trains are running) and carry double-deck trains and freight to be built at Heathrow.
	www.parliament.the-stationery-office.co.uk /pa/cm199899/cmselect/cmenvtra/30/3039.htm (3780 words)

	Railway Technology - Tractionel Enterprise - Overhead Railway Electrification, Construction and Reticulation (Site not responding. Last check: 2007-11-04)
		Tractionel Enterprise designs, supplies, erects and commissions 3kVDC, 25kVAC and 50kVAC railway electrification projects for Transnet, Metrorail and private siding owners, as well as underground and surface trolley lines of various voltages for mining companies.
		We pride ourselves in being awarded the electrification of the Palmford-Majuba Rail Link for Eskom and the upgrading of the 3kVDC and 50kVAC railway overhead electrification system at Iscor's Sishen Iron Ore Mine, as these were the largest private projects of its kind since the mid eighties.
		As Tractionel Enterprise holds a complete range of spares for railway electrification and trolley line projects, we are able to effect emergency repairs where accidental damage or theft has occurred to overhead contact line installations.
	www.railway-technology.com /contractors/electrification/tractionel (559 words)

	New Zealand Diesel and Electric Traction: Electric Locomotives and Multiple Units
		These were followed by seven EW class articulated locos from EE in 1952 for Wellington, and five EA class (later EO) locos from Toshiba of Japan replaced the English Electric EO locomotives at Otira in 1968.
		Following the electrification of the NIMT between Palmerston North and Hamilton in the mid 1980s, twenty-two Class 30 25kVAC locomotives were built by Brush of the UK.
		They are now generally known as the EF class and since the 1997 dieselisation of the Arthurs Pass - Otira section, are the only electric locos presently operating on Tranz Rail tracks.
	www.trainweb.org /nzdiesels/electric (321 words)

	Re: [(erielack) DL&W Electric Lines]
		The main reason that the DLW chose 3 K= VDC was that Thomas Edison lived and worked in the Oranges (even though he mo= stly shipped on the ERIE, and even though Westinghouse had facilities along th= e DLW at Ampere and Newark).
		25KVAC, 60 Hz, commercial power has become today's standard.
		There are a= lso some installations at 12.5KVAC, 60 Hz, which are interoperable with 11.3 = KVAC, 25 Hz, systems - the equipment doesn't need modification to run through o= n either of the 'low' voltages, and does - NJTransit at South Amboy, NJ, an= d AMTRAK at New Rochelle, NY.
	www.railfan.net /lists/erielack-digest/200003/msg00342.html (905 words)

	Capacitor test results
		To add a note of my own: I spent the better part of last weekend beating up my.025 uF 20KVAC Condenser Products cap from the first group purchase.
		I was running hard with inputs up to 25KVAC RMS into my eight inch coil: wall to wall, floor to ceiling, white hot bolts everywhere.
		After 5 minute runs with 6-8 kVA inputs I can report that I felt some moderate warming on the solid brass stud terminals; I feel the unit could easily handle much longer run times without worry of failure.
	www.pupman.com /listarchives/1996/may/msg00172.html (1060 words)

	Re: Near miss at Victoria (London)
		A 1.5kVDC spark > would be lucky to jump half a centimetre under the same conditions.
		> > A 25kVAC load of 250 kilowatts would be pulling 10 Amps.
		A 1.5kVDC load of 250 > kilowatts would be pulling 167 Amps, 16 times the current (1/16th the voltage).
	www.railpage.org.au /ausrail/01jan/msg01835.html (474 words)

	Beaconsfield South Page, B.W. Ring
		Now this section of railway (Beaconsfield to De Aar) is finally being electrified at 25kv 50 Hz and the AC/DC exchange yard is to be located at this location.
		Therefore, the De Aar based 7E class 25kvac electrics will work up to the Beaconsfield South location and swap tonnage with the direct current electrics.
		The layout of the AC/DC exchange yard required the addition of one road to the existing two roads.
	www.bwring.net /rail/sar/beaconsfield_south/beaconsfield_south.html (629 words)

	.HV Community Forum Archive (Site not responding. Last check: 2007-11-04)
		Currently I am building my Flyback - Based 25kVAC Generator (Single Transistor Flyback Driver) into one of those metal PC PSU cases.
		I am not trying to run my driver of 100v, I am running it off of 15 Volts, 2 Amps, because thats all my circuit really needs to oscillate and produce 25kVDC 1mA at the output.
		Wire tip on the 25kVAC wire, rated for 50kVDC, and there was the smallest about of corona leakage.
	www.4hv.org /archive/topic.362.html (1733 words)

	.HV Community Forum Archive (Site not responding. Last check: 2007-11-04)
		OK i tried simply putting the secondaries in series but that didn't yield any better results, i also tried putting the secondaries in parallel, but that didn't yield any better results either :-( am i doing somthing wrong (or am i just stupid)
		Yes, output current was limited to 1A at about 25kVAC.
		This was a special pole transformer (the actual voltage was between 25kV and 29kV - i forgot the exact spec) this person had and it was current limited via (2) two AC-220 Lincoln Arc Welders in parallel.
	www.4hv.org /archive/topic.22639.html (954 words)

	Articles - Transportation in Denmark (Site not responding. Last check: 2007-11-04)
		Sweden - yes - same gauge - voltage change 25kVAC / 15kVAC.
		Germany - yes - same gauge - voltage change 25kVAC / 15kVAC.
		The Oresund Bridge provides a rail connection with MalmÃ¶, Sweden.
	oldion.com /articles/Transportation_in_Denmark (441 words)

	TRAPOLO - Train Position Locator
		Demonstrate train control by using radio, radio block control, in combination with LFTs and odometer/tachometer technology.
		Low traffic line/sideline (25kVAC 50 Hz /15kVAC 162/3 Hz)
		Test of a vital and/or a non-vital TPL application prototype 2 and 3.
	www.compprof-rtp.com /tss-tag/TRAPOLO.htm (1520 words)

	MMC vs Commercial Caps (Site not responding. Last check: 2007-11-04)
		I list the desired values of the caps bellow: > >1.) 20KVAC RMS -at- 0.025 uFd >2.) 20KVAC RMS -at- 0.020 uFd >3.) 25KVAC RMS -at- 0.025 uFd >4.) 25KVAC RMS -at- 0.020 uFd > >If you have Capacitors that closely match I would very interested in price >quotes and technical details.
		BNZ2500-253A 4.75x2.75x18 $372/00 (.025mfd 25KV).....These >are polypropylene film, oil filled capacitors for corona free operation at >20KVAC and 25KVAC rms.
		Rectangular plastic case, dimensions in inches >Lead time 8 weeks aro.
	www.pupman.com /listarchives/1999/June/msg00375.html (402 words)

	diyAudio Forums Archive - Aleph4 220uf voltage ??????? Anyone Yuhhuuu
		Regarding cap ratings and what you can do to them, my other hobby is Tesla coils.
		We make high voltage (25kVAC) pulse caps from multiple strings of lower value PP caps.
		Now, the number you put in your series string has a dramatic effect on the total cap number for a given uF, and hence cost.
	www.diyaudio.com /forums/showthread/t-4369.html (1584 words)

	Airwise Discussion Forum - LX to further downsize?
		This line is French, and operated under 25kVAC.
		There are talks about a loop to the aiport, which could be built as a two-access loop, allowing trains coming in from the north as well.
		Electric Current isn't too hard to overcome with trains- Multiple pantographs are used all over europe.
	forum.airwise.com /forum/printthread.php?s=5bc74650275a1be6f962ae5d52337295&threadid=2412&perpage=20&pagenumber=6 (1818 words)

	TRS2004 Discussion Forum - BR Class 15 Diesel (UK) (Site not responding. Last check: 2007-11-04)
		The LMS were also involved with 10100, the 'Fell' loco - a diesel mechanical locomotive with 4 prime mover engines and 2 auxiliaries!
		The GWR gas turbine 18100 was converted to a 25kvAC electric, and renumbered E1000, then E2001.
		Just a quick point, if any of you railway modellers out there want to make an OO gauge model of one of these machines, Bachmann makes a 'Baby Trainmaster' (Not sure of the type) that closely resembles the Class 15...all you need do is repaint it, and you have a very passable representation...
	forums.auran.com /TRS2004/forum/showthread.php?threadid=50336 (755 words)

	Tenmat agent
		TENMAT's range of non - asbestos, higher temperature composites has now gained wide acceptance in these critical applications.
		British Rail has approved and used a GEC designed composite arc chute utilising non-asbestos SINDANYO L21, H61 and ARCLEX with DMC mouldings for use on the type 319 Thames Link EMU designed to work on 750 VDC ( 30,000A breaking load) or 25kVAC.
		TENMET arc chute materials are working in applications up to 11kv/2000A AC and 3000V/1000A DC.
	www.apexmechatronix.com /high.html (896 words)

	FINMECCANICA
		Out of ANSALDOBREDA's strong traditions come today's technologically advanced vehicles for railways and metropolitan networks — powerful, flexible locomotives, high-speed trains, metropolitan and suburban vehicles, all featuring cutting edge electrical and mechanical innovations.
		The dual-voltage (3kVdc - 25kVac) E 402 locomotive is the fastest and most powerful universal locomotive operating on Italian railways and one of the most powerful in the world.
		Its special inverter motor drives with de-ionized water cooling enable it to pull passenger trains at 220 km/h and cargo trains at 160 km/h.
	www.finmec.com /transportation.asp (615 words)

	Re: Future for QR Tin sets
		I was referring to the necessary equipment to operate the SX sets as self propelled trains under the 25KV OHTWE.
		I, too, would be pretty amazed to see 25KVAC traction motors!!!
		Regards Matt Smith Brisbane, Queensland matticue@corplink.com.au You can't slam a revolving door.
	www.railpage.org.au /ausrail/98dec/msg01700.html (141 words)

	Electric railways @ railwaysofbritain.bravehost.com - A Bravenet.com Hosted Site
		The cost of adding the new tunnel cost Â£4.25Million more than the original electrification price and also resulted in the system being late for opening.
		When the route did open for electric trains in 1954 it was 18 years after the original contracts had been signed and the system of electrification was becoming obviously outdated as new electrification programmes were planning to use 25kvac!!
		However the lines passenger service times were reduced severally demonstrating how efficient the electric trains were in comparison to the steam hauled trains.
	railwaysofbritain.bravehost.com /electric.html (1824 words)

	Railfan.net Forums - Future of the old E60s? (Site not responding. Last check: 2007-11-04)
		Apparently the E-60s would have a problem with the Deux-Montagnes line because of the curves at the beginning of the tunnel....something to do with the trucks of the E-60.
		Maybe though if the trucks were rebuilt and the locomotive modified for 25kvAC you could have them pulling 1200-series cars (ex-GO with one end rebuilt with high doors for Central Station) on that route.
		Not the first time one thought about "interchange" between the NEC and the Deux-Montagnes line.
	forums.railfan.net /forums.cgi?board=Amtrak;action=display;num=1024796327 (1640 words)

	Electric Railroads
		PRR could see this and eventually adopted 11KV.
		By the 1930's, GE had developed rectifier technology to the point where they sold DL&W on 3kv dc, which worked fine until worn out and then they moved to 25KVAC.
		By 1970 or so the technology of 60Hz had advanced enough to make it practical at 11kv for the NY&LB electrification (which PRR had not completely wired) and 25KV for the ex DL&W. Modern equipment makes the voltage change over trivial if designed for it.
	www.rosshorwood.com /RailSiteLinksFiles/ElectricRailroads.html (2809 words)

	Railway Lexicon (Site not responding. Last check: 2007-11-04)
		Locomotive or multiple unit train designed to operate over lines having two different electric traction power supply systems. Locomotives have been designed to operate with up to four different voltages covering both AC and DC systems. Some trains can operate on lines with either overhead or
		third rail current collection, as in the case of Eurostar Trains and UK Class 92 Channel Tunnel locomotives and some North East Corridor trains in New York. Eurostar trains can handle 750Vdc (England) 1500Vdc (Holland + France), 3000Vdc (Belgium) and 25kVac (Belgium and France).
		Slang term for a shunting signal, ex LMS terminology.
	www.railway-technical.com /lex15.html (14130 words)

	Trains.com - How much power is generated by dynamic braking?
		So let's cut that back to 3" = 10KV.
		So, if we take a "standard" transmission line voltage of 25kVac, apply the RMS correction (root 2), and we're looking at 1 foot clearance from the tunnel roof, and a further clearance of 1 foot from the doublestacks.
		Which probably have the occasional corona point (a deep scratch will do) and all sorts of other crap on top of them.
	www.trains.com /community/forum/topic.asp?page=3&TOPIC_ID=26250 (1191 words)

	diesel&electric:BR:Trains:AJH
		Date : 05 May 1980, catalogued 05 Jan 1999
		Description : 25kvac electric loco 84009 takes over from diesel loco 47536 on a Manchester Victoria to Glasgow train at Preston Station.
		Date : Jul 1986, catalogued 27 Nov 1999
	www.csse.monash.edu.au /~ajh/trains/br/diesel (973 words)

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