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Chris Kast's VeriTranz Blog

Tuesday, November 4, 2014

Freight Rail Signal Issues and Induced Current

    Many freight and commuter railroads including Class Is have had signal issues related to induced current on the rail from a variety of sources.  The most common of these sources is induced current from power generating companies or other industrial entities.  Power frequencies such as 60 Hz and their 3rd and 5th harmonics (in this case 180 Hz and 300 Hz) can have disruptive and damaging effects on track circuits and signal system components.  These harmonics are the result of non-linear loads on the power company's generating equipment which distort the voltage waveform.

 

     In order to help identify this issue, we can program our Rail Scanner Pro to scan and display the base power frequencies along with their harmonics as well as all the track frequencies and overlays the customer wants to see.  In two field demonstrations in the last few months, we were able to detect significant induced current at the 3rd harmonic, 180 Hz.  These harmonics can cause damage to generators, induction motors, transformers, cables, circuit breakers and fuses. Most of this damage is in the form of overheating caused by eddy currents and stray flux losses.  They also contribute to iron and copper losses which further reduce the life of these components.  If you suspect that you have induced current issues, please contact us to set up a demonstration.

 

   

 

4:12 pm est          Comments

Monday, July 7, 2014

"SEE and BE SEEN" when troubleshooting signals on the rail !
 
When signal professionals are troubleshooting signals issues, performing routine maintenance, or inspecting sections of the rail, they are exposed to many safety hazards, not the least of which is dangerous interaction with trains or transit vehicles.  Traditional methods of troubleshooting signals require the maintainer to get down on hands and knees or bend down to put test leads across the rail or wrap a coil around the rail.  These methods reduce the signalman's visibility to trains and takes his attention away from area train traffic.  The Rail Scanner Pro scanning audio frequency rail current detector from Veritech allows the user to stand and walk upright while rolling the unit along the rail.  The user is more visible to trains and can keep his eye on area traffic listening to an audible output rather than staring at a meter.  Aside for the safety aspects, the Rail Scanner Pro also significantly reduces the time to troubleshoot and find the underlying cause of the signal problem.
9:23 am edt          Comments

Tuesday, June 3, 2014

RSSI EXPO "signals" success for Rail Current Detector line

      The VeriTranz by Veritech booth was a popular stop for signal professionals at the RSSI EXPO 2014 in Nashville, TN.  Over 100 of them participated in live demos of our Multi Frequency and Scanning Audio Frequency Rail Current Detectors.  These included employees of CSX, BNSF, Union Pacific, Norfolk Southern, CN, MARTA, Kansas City Southern, and many others.  The show was extremely well run and our hats are off to Mike Drudy and the RSSI team, as well as the Gaylord Opryland Convention Center for an excellent first time supplier experience.

3:57 pm edt          Comments

Thursday, April 24, 2014


Thursday, April 24th

          Since we will be exhibiting at the RSSI C&S expo in Nashville, we have been focused this week on getting prepared for the show.  I was reminded yesterday why our rail current detectors are such an effective troubleshooting tool while doing a training demo at NJ Transit Light Rail-Bloomfield.  The Scanning Audio unit
easily scanned and detected their 60 Hz power frequency as well as the audio track frequencies.  When the section was shunted, the unit found the 2340 Hz cab signal as well.  All of the signal maintainers and technicians were impressed with the capabilities of our device.  Rather than having to check the bond to find out what the transmit and receive frequencies were, our unit displayed the frequencies present.  They could then dial to the frequency under test, and roll the unit along the rail to find the problem.



Tuesday, April 22nd

         Veritech has submitted a proposal to the Greater Cleveland
Regional Transportation Authority for the Brake Microprocessor Circuit design and prototype on their Heavy Rail Vehicles.
We first became aware of the coming RFP while at GCRTA to demo our Scanning Audio Rail Current Detector.  When the RFP was formally announced, we scheduled a visit to do a visual inspection of the unit and later attended the pre-proposal conference.
10:14 am edt          Comments

Thursday, March 6, 2014

SEPTA Embraces Our Scanning Audio Technology !

     Septa has placed an order for four of our Scanning
Audio Frequency Rail Current Detectors after demos were
performed in November of last year.  These will be used by
the Light Rail and Subway signal groups to troubleshoot
audio frequency signal problems on rail lines including the
Market-Frankford and Norristown High Speed lines.
To date SEPTA has purchased more of our rail current
detector units than any other agency and we continue
to get positive feedback from the field.
1:11 pm est          Comments

2014.11.01 | 2014.07.01 | 2014.06.01 | 2014.04.01 | 2014.03.01 | 2014.01.01 | 2013.12.01 | 2013.10.01 | 2013.09.01

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