Introduction
Delegates attending this course will develop their skills and knowledge to conduct maintenance and faulting activities on TI21 track circuits efficiently and effectively. This course has been developed by us in association and on behalf of Network Rail and is at present the Network Rail approved TI21 training course for Maintenance & Faulting.
Objectives
On successful completion of the course the candidate will be able to:
 | Explain the basic principles of track circuits |
| Identify the main components of a TI21 track circuit |
| Explain the principles and operation of a TI21 track circuit |
| Identify different configurations of TI21 track circuits |
| Identify the restrictions & 'Hybrid' interfacing of adjoining track circuits |
| Identify 'Bonding' & 'Scheme Plan' symbols |
| Perform routine service of TI21 track circuits in accordance with the current SMS and complete the relevant documentation |
| Fault diagnosis and rectification to a TI21 track circuit using a systematic approach |
| Produce current and voltage profiles for a TI21 track circuit |
| Use test equipment specific to TI21 including Frequency Selective Meter (FSM), LemFlex, Sleeper Integrity Tester and the Rocoil |
| Interpret results from specific test equipment to identify possible faults at an early stage |
| Identify Infrastructure conditions that may effect correct operation of TI21 |
| Carry out basic fault finding activities |
Who Should Attend
Network Rail S&T Technicians and those who work within maintenance teams who
will be expected to maintain and test TI21 track circuits. This would also
benefit persons who are expected to work on the installation and testing of TI21
Prerequisites
Candidates should have basic electrical/electronic knowledge and should have
attended a Basic Signalling 1 course or equivalent
Features
Provides a comprehensive introduction to TI21 track circuits and associated maintenance techniques. This course allows the candidate the opportunity for setting up and testing TI21 track circuits in a safe environment on our fully operational Low Power track circuit with Tuned Zone and our separate Normal Power Tuned Zone. This allows each candidate the chance to carry out full set up procedures, be able to take all the readings required to fully complete a record card, basic fault finding techniques and the use of test equipment to draw 'graph' style profiles of the track circuit (very useful in track monitoring and early failure detection/prevention). Our track set up also allows for the use of other test/fault finding equipment; i.e. the Sleeper Integrity Tester (for detection of failing/failed sleepers), the Lemflex (used for testing impedance bonds), the Rocoil (used for track profiling but also very good for locating short circuits between the running rails) and the use of the FSM and the TTM as well as a digital volt meter.
Learning Approach
Classroom theory
sessions using visual aids, practical demonstrations with
fault finding sessions.
Assessment
Written test paper plus practical assessment (both of which must be passed to receive
a certificate of merit) with evidence collection during course
Duration
Four days
Further courses
Support - one day refresher every 2 years (optional)
Number of Participants
Maximum 6
Booking Code: TI21MF
Additional Information
This
course can be tailored to your specific requirements. Details upon request