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2/13/2017 Company Presentation CONFIDENTIAL 1Company Presentation CONFIDENTIAL
Track Circuit Life Check
The preventive track circuit maintenance solution

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• What is a track circuit?
• AC and Pulse track circuits
• How often and why does a track circuit fail?
• Maintenance actions
• The Track Circuit Life Check in one slide
• Benefits of Track Circuit Life Check
• Technical Specifications
• Customers
Agenda

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What is a track circuit?
● A track circuit is an electrical device used to detect the presence of
a train onto a block section, separated by insulated/electrical joints
● Track circuit occupation:
– train wheels and axles connect running rails together
– current through the circuit reduced to zero

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AC/DC Track Circuits
● AC Track Circuits:
– energized by an alternating electrical current
– separated by electrical joints
● Pulse Track Circuits:
– energized by an alternating electrical current (pulse signal)
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How often does a track circuit fail?
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● Track circuits designed to be fail safe
● Failure ⇒ section indicated as occupied ⇒ service delays
● Rail operators penalised by 30-70 € per delay minute
● Average failure rate is around 0.45 times per year per installation!
● High manual inspection rate required
Table1. Typical track circuit failure statistics (UK based data)

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What kind of Maintenance actions can be taken?
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● Corrective Maintenance can be performed after a fault occurrence, so
that the track circuit can be repaired and restored
● Preventive Maintenance can be regularly performed to monitor the
health of the track circuit and increase failure detection, in order to plan
a preventive action
● Predictive Maintenance can be regularly performed in order to predict
when maintenance or replacement actions should be taken

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Track Circuit Life Check in one slide
● On-board System for automated measuring of track circuits
● Track circuits health evaluation lab-on-wheels
● Independent of any other on-board systems
● Compatibility with all track circuits:
– AC track circuits
– Pulse track circuits
● Hundreds of Track Circuits measured per hour
● All key parameters measured from a measurement vehicle at
commercial operation speed
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Benefits of Track Circuit Life Check
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● Allows the switch from corrective to preventive maintenance
● Reduces response time in case of corrective maintenance
● Reduces manual inspections:
– 1 manual inspection per year OR
– manual inspection performed only in case of degradation spotted
● Flexible modular architecture, adaptable to all kind of Track Circuits

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Technical Specifications
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● Measurements, signals detection and analysis:
– Track short circuit current measurement at ± 5mA precision
– Track circuit currents audio frequencies measurement at ± 1Hz precision
– Transmission line compensation capacitors detection and quality evaluation
– Loops frequency detection to check functional states of transmitting loops
– Track circuits FM modulation detection for track-to-train transmission bits identification
● Radio Communications:
– Full UMTS/3G data link for remote monitoring and maintenance

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Technical Specifications
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● Databases
– Real-time track circuits analysis during train movement
– RAW data of all track elements analysed and stored in database if further analysis is required
● Track Element Positioning:
– All track elements with precision location are recorded, using either:
» GPS data coupled to Inertial Measurement Unit (IMU) for sub-meter precise positioning, OR
» Longitudinal track (KP) positioning based on odometry units (Wheel sensor, Dopple radar)
● Preventive Maintenance:
– Preventive maintenance based on multi-data of the same track element in time and deviation analysis

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Customers
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● Eurotunnel for TVM430 / UM71 condition monitoring
● Mesea for TVM300/ TVM430 / UM71 condition monitoring
● What about YOU?
– Want to know more about this, discuss business case and receive an offer?
– Please contact us!
info@ertmssolutions.com

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Thank you for your attention!
www.ertmssolutions.com