Podcast
Questions and Answers
What is the minimum length, in meters, a track circuit should cover, assuming it must cover at least two rail lengths?
What is the minimum length, in meters, a track circuit should cover, assuming it must cover at least two rail lengths?
- 39
- 20
- 26 (correct)
- 13
The clearance from the foot of the rail should not be less than how many mm to keep the ballast clear off the rails and rail fastenings?
The clearance from the foot of the rail should not be less than how many mm to keep the ballast clear off the rails and rail fastenings?
- 30 mm
- 50 mm (correct)
- 25 mm
- 40 mm
For short welded rail panels, two rail lengths of what length in meters shall be interposed to isolate the short welded rail from the insulated joint?
For short welded rail panels, two rail lengths of what length in meters shall be interposed to isolate the short welded rail from the insulated joint?
- 14 or 15 meters
- 11 or 12 meters
- 10 or 11 meters
- 12 or 13 meters (correct)
In cut section arrangements, what is the minimum distance, in meters, for existing yards between tracks, below which fouling marks should be fixed?
In cut section arrangements, what is the minimum distance, in meters, for existing yards between tracks, below which fouling marks should be fixed?
In cut section arrangements, what is the minimum distance, in meters, for new yard lines between tracks, below which fouling marks should be fixed?
In cut section arrangements, what is the minimum distance, in meters, for new yard lines between tracks, below which fouling marks should be fixed?
The distance of 13 meters between the insulated Block Joint or Detection Point and the starter Signal can be reduced to how many meters for Signaled movements?
The distance of 13 meters between the insulated Block Joint or Detection Point and the starter Signal can be reduced to how many meters for Signaled movements?
For track circuits longer than 700 meters, what is the maximum resistance in ohms allowed for the rail and bonding per 1000 meters of track?
For track circuits longer than 700 meters, what is the maximum resistance in ohms allowed for the rail and bonding per 1000 meters of track?
If the track circuit length is less than 700 meters, a rail and bond resistance of up to how many ohms per 1000 meters of track may be allowed?
If the track circuit length is less than 700 meters, a rail and bond resistance of up to how many ohms per 1000 meters of track may be allowed?
What is the excitation voltage percentage range for QBAT Relays?
What is the excitation voltage percentage range for QBAT Relays?
What is the maximum excitation voltage for plug-in type relays other than QBAT relays?
What is the maximum excitation voltage for plug-in type relays other than QBAT relays?
What is the minimum ballast resistance of track in station yards, as measured in ohms per kilometer?
What is the minimum ballast resistance of track in station yards, as measured in ohms per kilometer?
What is the minimum ballast resistance of track in the block section, as measured in ohms per kilometer?
What is the minimum ballast resistance of track in the block section, as measured in ohms per kilometer?
Plug-in type track relays are replaced after how many years of use??
Plug-in type track relays are replaced after how many years of use??
What is the allowable straight length of track circuit, in meters, in end fed mode for Audio Frequency Track Circuits (AFTC)?
What is the allowable straight length of track circuit, in meters, in end fed mode for Audio Frequency Track Circuits (AFTC)?
In single rail DC track circuits, the uninsulated rails of the adjacent tracks shall be cross-bonded at intervals of not more than how many meters?
In single rail DC track circuits, the uninsulated rails of the adjacent tracks shall be cross-bonded at intervals of not more than how many meters?
For single rail DC track circuits with catenary current restricted to 300 Amperes on a single track section, what length of DC track circuit should be?
For single rail DC track circuits with catenary current restricted to 300 Amperes on a single track section, what length of DC track circuit should be?
How much can the length of the track circuit can be extended upto when QTA 2 plug-in relay is used?
How much can the length of the track circuit can be extended upto when QTA 2 plug-in relay is used?
The track circuit length restriction due to the use of concrete sleeper can be relaxed upto how many meters if adequate ballast resistance can be consistently obtained?
The track circuit length restriction due to the use of concrete sleeper can be relaxed upto how many meters if adequate ballast resistance can be consistently obtained?
QBAT relays can be used upto a maximum length of track circuit of how many meters using one additional 'B' type choke at the relay end, under minimum ballast resistance of 2 ohms/km?
QBAT relays can be used upto a maximum length of track circuit of how many meters using one additional 'B' type choke at the relay end, under minimum ballast resistance of 2 ohms/km?
In AC Electrified areas, what is the maximum stray DC current allowed if the length of the track circuit is less than 100 meters?
In AC Electrified areas, what is the maximum stray DC current allowed if the length of the track circuit is less than 100 meters?
What is maximum stray DC current allowed if the length of the track circuit is 100 meters and above?
What is maximum stray DC current allowed if the length of the track circuit is 100 meters and above?
Generally, what is the continuous current, in Amperes, that an AC impedance bond should be capable of supporting?
Generally, what is the continuous current, in Amperes, that an AC impedance bond should be capable of supporting?
What is the peak loading, in Amperes, that an AC impedance bond should be capable of supporting for a period of up to five minutes?
What is the peak loading, in Amperes, that an AC impedance bond should be capable of supporting for a period of up to five minutes?
In RE areas, what is the distance in meters for longitudinal bonding on a non track circuited track adjacent to a track circuit shall be extended?
In RE areas, what is the distance in meters for longitudinal bonding on a non track circuited track adjacent to a track circuit shall be extended?
In the measurement of stray current, what is the maximum Rail-Earth voltage as measured across 9 ohms, 4 ohms, or 2.25 ohms that shall not exceed in volts?
In the measurement of stray current, what is the maximum Rail-Earth voltage as measured across 9 ohms, 4 ohms, or 2.25 ohms that shall not exceed in volts?
What is the total stray current as measured that shall not exceed where all track circuits to be installed on the line are less than 100 meters long, the highest acceptable figure of stray current?
What is the total stray current as measured that shall not exceed where all track circuits to be installed on the line are less than 100 meters long, the highest acceptable figure of stray current?
What is the minimum distance, in meters, between two adjacent axle detectors of different axle counters for minimizing mutual interference?
What is the minimum distance, in meters, between two adjacent axle detectors of different axle counters for minimizing mutual interference?
What is the maximum ripple of input power supply of track side electronic equipment peak to peak?
What is the maximum ripple of input power supply of track side electronic equipment peak to peak?
What is the maximum ripple of input power supply of track side electronic equipment in RMS?
What is the maximum ripple of input power supply of track side electronic equipment in RMS?
The connections between battery, battery charger and DC-DC converter shall be laid at least how many mm from any other bunch of wires
The connections between battery, battery charger and DC-DC converter shall be laid at least how many mm from any other bunch of wires
A railway vehicle with a maximum wheelbase of 15 meters is to be detected using a track circuit. What is the minimum length, in meters, the track circuit must span to ensure reliable detection?
A railway vehicle with a maximum wheelbase of 15 meters is to be detected using a track circuit. What is the minimum length, in meters, the track circuit must span to ensure reliable detection?
What is the minimum vertical clearance, in millimeters, required from the foot of the rail to the ballast in a track circuit to prevent ballast interference with rails and fastenings?
What is the minimum vertical clearance, in millimeters, required from the foot of the rail to the ballast in a track circuit to prevent ballast interference with rails and fastenings?
When using short welded rail (SWR) panels near insulated joints, a section of standard rails must be interposed. What minimum combined length, in meters, of standard rails should be used if two rail lengths are specified for this interposition?
When using short welded rail (SWR) panels near insulated joints, a section of standard rails must be interposed. What minimum combined length, in meters, of standard rails should be used if two rail lengths are specified for this interposition?
For existing railway yard tracks in a cut section arrangement, fouling marks are necessary if tracks are closer than a certain distance. What is the minimum distance, in meters, between the center lines of such tracks below which fouling marks must be installed?
For existing railway yard tracks in a cut section arrangement, fouling marks are necessary if tracks are closer than a certain distance. What is the minimum distance, in meters, between the center lines of such tracks below which fouling marks must be installed?
In new railway yard constructions with cut section arrangements, at what minimum distance, in meters, between track center lines are fouling marks required to be fixed?
In new railway yard constructions with cut section arrangements, at what minimum distance, in meters, between track center lines are fouling marks required to be fixed?
The standard distance between an insulated Block Joint and a starter signal is 13 meters. For signaled movements, this distance can be reduced. What is the minimum permissible reduced distance, in meters?
The standard distance between an insulated Block Joint and a starter signal is 13 meters. For signaled movements, this distance can be reduced. What is the minimum permissible reduced distance, in meters?
For track circuits exceeding 700 meters in length, what is the maximum permissible resistance, in ohms per 1000 meters of track, for the rail and bonding to ensure reliable operation?
For track circuits exceeding 700 meters in length, what is the maximum permissible resistance, in ohms per 1000 meters of track, for the rail and bonding to ensure reliable operation?
If a track circuit is shorter than 700 meters, a higher rail and bond resistance is acceptable. What is the maximum allowable rail and bond resistance, in ohms per 1000 meters of track, for these shorter circuits?
If a track circuit is shorter than 700 meters, a higher rail and bond resistance is acceptable. What is the maximum allowable rail and bond resistance, in ohms per 1000 meters of track, for these shorter circuits?
Concrete sleepers are used in track circuits. What is the minimum resistance, in ohms, required between inserts of these concrete sleepers to ensure proper track circuit insulation?
Concrete sleepers are used in track circuits. What is the minimum resistance, in ohms, required between inserts of these concrete sleepers to ensure proper track circuit insulation?
In single rail DC track circuits, adjacent uninsulated rails must be cross-bonded to mitigate stray currents. What is the maximum interval, in meters, between these cross-bonds?
In single rail DC track circuits, adjacent uninsulated rails must be cross-bonded to mitigate stray currents. What is the maximum interval, in meters, between these cross-bonds?
What is the maximum permissible stray DC current, in milliamperes, in AC electrified areas for a track circuit less than 100 meters in length?
What is the maximum permissible stray DC current, in milliamperes, in AC electrified areas for a track circuit less than 100 meters in length?
If a track circuit in an AC electrified area is 100 meters or more in length, what is the maximum allowed stray DC current, in milliamperes?
If a track circuit in an AC electrified area is 100 meters or more in length, what is the maximum allowed stray DC current, in milliamperes?
An AC impedance bond is designed to handle continuous train currents. What is the generally specified minimum continuous current carrying capacity, in Amperes, for an AC impedance bond?
An AC impedance bond is designed to handle continuous train currents. What is the generally specified minimum continuous current carrying capacity, in Amperes, for an AC impedance bond?
AC impedance bonds must also withstand short-term high currents. What peak loading current, in Amperes, should an AC impedance bond be capable of supporting for up to five minutes?
AC impedance bonds must also withstand short-term high currents. What peak loading current, in Amperes, should an AC impedance bond be capable of supporting for up to five minutes?
In Railway Electrification (RE) areas, longitudinal bonding on non-track circuited tracks adjacent to track circuits needs to be extended beyond the track circuit. What is this minimum extension distance, in meters?
In Railway Electrification (RE) areas, longitudinal bonding on non-track circuited tracks adjacent to track circuits needs to be extended beyond the track circuit. What is this minimum extension distance, in meters?
When measuring stray current, the Rail-Earth voltage is measured across a resistance. What is the maximum Rail-Earth voltage, in volts, allowed, regardless of whether measured across 9 ohms, 4 ohms, or 2.25 ohms?
When measuring stray current, the Rail-Earth voltage is measured across a resistance. What is the maximum Rail-Earth voltage, in volts, allowed, regardless of whether measured across 9 ohms, 4 ohms, or 2.25 ohms?
What is the maximum permissible total stray current, in milliamperes, when all track circuits to be installed on a line are shorter than 100 meters?
What is the maximum permissible total stray current, in milliamperes, when all track circuits to be installed on a line are shorter than 100 meters?
To minimize mutual interference between adjacent axle detectors of different axle counters, what is the minimum separation distance, in meters, required between them?
To minimize mutual interference between adjacent axle detectors of different axle counters, what is the minimum separation distance, in meters, required between them?
Plug-in type track relays have a limited service life due to wear and tear. After how many years of operational use are plug-in type track relays typically replaced?
Plug-in type track relays have a limited service life due to wear and tear. After how many years of operational use are plug-in type track relays typically replaced?
What is the maximum permissible straight length of a track circuit, in meters, when operated in end-fed mode using Audio Frequency Track Circuits (AFTC)?
What is the maximum permissible straight length of a track circuit, in meters, when operated in end-fed mode using Audio Frequency Track Circuits (AFTC)?
What is the minimum ballast resistance of track, in ohms per kilometer, required in station yards to ensure proper functioning of track circuits?
What is the minimum ballast resistance of track, in ohms per kilometer, required in station yards to ensure proper functioning of track circuits?
For track circuits located in the block section, a higher ballast resistance is required compared to station yards. What is the minimum ballast resistance, in ohms per kilometer, for track in the block section?
For track circuits located in the block section, a higher ballast resistance is required compared to station yards. What is the minimum ballast resistance, in ohms per kilometer, for track in the block section?
In single rail DC track circuits with catenary current limited to 300 Amperes, what is the restricted maximum length, in meters, for the DC track circuit?
In single rail DC track circuits with catenary current limited to 300 Amperes, what is the restricted maximum length, in meters, for the DC track circuit?
When using QTA 2 plug-in relays, the standard track circuit length can be extended. What is the maximum extended length of track circuit, in meters, achievable with QTA 2 relays?
When using QTA 2 plug-in relays, the standard track circuit length can be extended. What is the maximum extended length of track circuit, in meters, achievable with QTA 2 relays?
The use of concrete sleepers can restrict track circuit length. However, this restriction can be relaxed if adequate ballast resistance is consistently maintained. Up to what length, in meters, can the track circuit length restriction be relaxed?
The use of concrete sleepers can restrict track circuit length. However, this restriction can be relaxed if adequate ballast resistance is consistently maintained. Up to what length, in meters, can the track circuit length restriction be relaxed?
QBAT relays enhance track circuit performance. What maximum length of track circuit, in meters, can QBAT relays support with one additional 'B' type choke at the relay end, assuming a minimum ballast resistance of 2 ohms/km?
QBAT relays enhance track circuit performance. What maximum length of track circuit, in meters, can QBAT relays support with one additional 'B' type choke at the relay end, assuming a minimum ballast resistance of 2 ohms/km?
In RE areas, longitudinal bonding is extended on non-track circuited tracks adjacent to track circuits. What is the minimum length of this extension, in meters, beyond the track circuit?
In RE areas, longitudinal bonding is extended on non-track circuited tracks adjacent to track circuits. What is the minimum length of this extension, in meters, beyond the track circuit?
For efficient maintenance and inspection, how frequently, in months, should track circuit test records be updated for DC track circuits?
For efficient maintenance and inspection, how frequently, in months, should track circuit test records be updated for DC track circuits?
To prevent permanent magnetization and ensure balanced wear, how often should the connections of DC track relays be interchanged?
To prevent permanent magnetization and ensure balanced wear, how often should the connections of DC track relays be interchanged?
What is the maximum percentage of missing liners permitted for a track circuit length to maintain effective insulation?
What is the maximum percentage of missing liners permitted for a track circuit length to maintain effective insulation?
In areas equipped with single rail DC track circuits, which of the following statements is NOT a requirement for managing traction return current?
In areas equipped with single rail DC track circuits, which of the following statements is NOT a requirement for managing traction return current?
What is the primary reason for cross-bonding the uninsulated rails of adjacent tracks in single rail DC track circuits?
What is the primary reason for cross-bonding the uninsulated rails of adjacent tracks in single rail DC track circuits?
When are electrical separation joints (ESJs) mandated for track circuits?
When are electrical separation joints (ESJs) mandated for track circuits?
What should be the minimum cross section of copper conductor lead wires used for connecting the feed set to the junction box?
What should be the minimum cross section of copper conductor lead wires used for connecting the feed set to the junction box?
Where should track relays be located?
Where should track relays be located?
What action is required if a track relay is subjected to vibration?
What action is required if a track relay is subjected to vibration?
What is the correct method for handling spare contacts on a track relay?
What is the correct method for handling spare contacts on a track relay?
Which statement describes the correct arrangement of jumper connections for track circuits?
Which statement describes the correct arrangement of jumper connections for track circuits?
What is a key consideration for electrical connections to the track?
What is a key consideration for electrical connections to the track?
What is the minimum acceptable size for cables used as long jumpers in track circuits?
What is the minimum acceptable size for cables used as long jumpers in track circuits?
What is the acceptable resistance of rail and bonding for track circuits longer than 700 meters and track circuits with length less than 700 meters?
What is the acceptable resistance of rail and bonding for track circuits longer than 700 meters and track circuits with length less than 700 meters?
What is the permissible action if hammer driving offish-bolt during installation of nylon insulated rail joint?
What is the permissible action if hammer driving offish-bolt during installation of nylon insulated rail joint?
Prior to the installation of an insulated joint, what is essential to verify concerning the permanent way?
Prior to the installation of an insulated joint, what is essential to verify concerning the permanent way?
Which of the following statements concerning track indicators at panel interlocked stations is incorrect?
Which of the following statements concerning track indicators at panel interlocked stations is incorrect?
Under what conditions should a Q series track relay be used?
Under what conditions should a Q series track relay be used?
What is the minimum excitation level of a DC track relay under minimum ballast resistance condition and normal working voltage of the supply?
What is the minimum excitation level of a DC track relay under minimum ballast resistance condition and normal working voltage of the supply?
What is the maximum permitted excitation voltage for plug-in type relays, excluding QBAT relays?
What is the maximum permitted excitation voltage for plug-in type relays, excluding QBAT relays?
Under general maintenance of DC Track Circuits, which of the following conditions should be ensured?
Under general maintenance of DC Track Circuits, which of the following conditions should be ensured?
Why it is necessary to interchange the connection of DC track relay quarterly?
Why it is necessary to interchange the connection of DC track relay quarterly?
During quarterly visual inspections of track relays, which of the following checks is unnecessary?
During quarterly visual inspections of track relays, which of the following checks is unnecessary?
What action should be taken when a defective track relay is identified?
What action should be taken when a defective track relay is identified?
According to maintenance guidelines, what is the designated lifespan of plug-in type track relays?
According to maintenance guidelines, what is the designated lifespan of plug-in type track relays?
Who is responsible for opening & fixing of fish plates of Nylon insulation joint for installation/ replacement of joint?
Who is responsible for opening & fixing of fish plates of Nylon insulation joint for installation/ replacement of joint?
What specific type of pandrol clip is required at nylon insulation joints/glued joints?
What specific type of pandrol clip is required at nylon insulation joints/glued joints?
Which of the following actions is not part of the maintenance procedure for bond wires?
Which of the following actions is not part of the maintenance procedure for bond wires?
What percentage of missing liners is the maximum acceptable limit for a track circuit length?
What percentage of missing liners is the maximum acceptable limit for a track circuit length?
Which aspect of the maintenance of track circuit drainage is particularly emphasized?
Which aspect of the maintenance of track circuit drainage is particularly emphasized?
Which of the following best describes the purpose of zig-zag welding rusty rails in track circuited areas?
Which of the following best describes the purpose of zig-zag welding rusty rails in track circuited areas?
Flashcards
What is the purpose of a closed track circuit?
What is the purpose of a closed track circuit?
A closed type track circuit is used to verify that the rail track is clear of obstructions.
Track circuit types in RE vs non-RE areas
Track circuit types in RE vs non-RE areas
Double rail track circuits are standard in non-RE areas. In RE areas, single rail circuits for D.C. tracks and double rail for AFTC tracks are preferred.
Minimum Track Circuit Length
Minimum Track Circuit Length
The track circuit should be long enough to cover the maximum wheelbase of any vehicle and at least two rail lengths (26 meters)
Why keep track circuited areas clear?
Why keep track circuited areas clear?
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Location of Track Relays
Location of Track Relays
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Track relay connection requirements
Track relay connection requirements
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Minimum Jumper Wire Size
Minimum Jumper Wire Size
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Track circuit termination distance
Track circuit termination distance
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Insulated Rail Joint Installation
Insulated Rail Joint Installation
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What are Track Indicators?
What are Track Indicators?
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What DC track relays should be installed?
What DC track relays should be installed?
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What must be used with a Q series track relay?
What must be used with a Q series track relay?
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Excitation of DC Track Relay
Excitation of DC Track Relay
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What is the goal for ballast resistance?
What is the goal for ballast resistance?
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How often, should Train shunt test be performed?
How often, should Train shunt test be performed?
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Requirements for maintenance of axle counters.
Requirements for maintenance of axle counters.
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How are Audio Frequency Track Circuits defined?
How are Audio Frequency Track Circuits defined?
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Voltage Concerns for interference mechanism
Voltage Concerns for interference mechanism
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What are the advantages of Audio Frequency Track Circuits (AFTC)?
What are the advantages of Audio Frequency Track Circuits (AFTC)?
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What is trolley suppression?
What is trolley suppression?
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What is the requirement for track feed?
What is the requirement for track feed?
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Inspections of the track
Inspections of the track
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Track relay design
Track relay design
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Joint type for Defining Track Circuit Boundary
Joint type for Defining Track Circuit Boundary
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Distance Between Staggered Joints
Distance Between Staggered Joints
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Rail end preparation
Rail end preparation
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Joint Maintenance : Fish bolts and Sleepers
Joint Maintenance : Fish bolts and Sleepers
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Track Drainage
Track Drainage
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Track Ballast maintenance
Track Ballast maintenance
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Rail End Cleanliness
Rail End Cleanliness
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Anti-Creep Devices
Anti-Creep Devices
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Insulated joints screw preference
Insulated joints screw preference
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Insulated Sleepers
Insulated Sleepers
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SWR isolation
SWR isolation
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Insulation for Turnouts/Crossings
Insulation for Turnouts/Crossings
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GFN Liners Context
GFN Liners Context
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Track circuit ends
Track circuit ends
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Track Relay Load
Track Relay Load
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Jumper Connections: Series Circuit
Jumper Connections: Series Circuit
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Jumper Protection
Jumper Protection
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Connection length
Connection length
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Lead wire Size
Lead wire Size
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Junction Box Ballast
Junction Box Ballast
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Feed/Relay End cable
Feed/Relay End cable
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Bond installation method
Bond installation method
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Bond holes
Bond holes
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Track resistance
Track resistance
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'J' type clip
'J' type clip
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DC Track Relay Values
DC Track Relay Values
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Track relay checks
Track relay checks
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Defective Relay Protocol
Defective Relay Protocol
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Track relays lifespan
Track relays lifespan
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Track relay quarterly maintenance checks
Track relay quarterly maintenance checks
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DC Track Relay Interchanging
DC Track Relay Interchanging
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Track circuit testing
Track circuit testing
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Track circuit power source
Track circuit power source
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Bond Wires/Rope Wires conditions
Bond Wires/Rope Wires conditions
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Bonds painting
Bonds painting
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Track circuit record keeping
Track circuit record keeping
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Report Defective Valves
Report Defective Valves
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Evaluator feeder
Evaluator feeder
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Energized during weather
Energized during weather
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Study Notes
Track Circuits in RE Area
- Track circuits on AC electrified sections use either IRJs (Insulated Rail Joints) or ESJs (electrical separation joints)
- They can be single or double rail track circuits
- Electric separation joints must be configured as double rail track circuits only
Single Rail DC Track Circuit
- In single rail track circuits, one rail is for traction return current and is called the uninsulated rail
- Connections from O.H.E. masts/structures connect only to the uninsulated rail
- Return current connections at booster transformers and return conductors connect only to the uninsulated rail
- The rail next to the O.H.E Mast should be the uninsulated rail when possible
- Electrical department will need to provide suitable precaution to avoid shorting if track circuits are staggered, or near crossings
Traction
- Cross-bond the uninsulated rails of adjacent tracks at intervals of 100 meters in single rail track circuits in order to address breaks
- Provide cross bonding on the uninsulated rail at each end of the track circuit if the track is less than 100 Meters; see Drg no. 17-D3
- Stagger the return rail in track circuits that are adjacent to each other
- This track circuit only configures to work as a single rail
- Traction return current flowing in the single traction return rails creates a longitudinal AC voltage along its length
- A wheel set at the feed end will impress this interfering voltage on the relay while a wheel set at the relay end will similarly impress the interfering voltage on the feed set
Equipment to use
- Use approved AC immunised track relays in AC traction areas, because:
- Track circuit equipment must be immune to false operation and damage from impressed voltages
- DC track circuit length is restricted depending upon rail return current
- Restrict catenary current to 300 Ampere on single track and 600 Amperes on double track, the DC circuits will depend on Sleeper and realy types
- The length can have an extension, reach 450 meters, when said plugin, is used
- Railway staff may allow more slack for length, specifically to 450 by railway
Increased Immunity
- Relays can reach 750 with increased immunity
- QBAT can get this, but only when there is magnetic B type additional and best cond – This type will require four cells delivering
- Relays must all always agree
Measurements, stray
- It helps to keep a certain length for high Amperes
- Keep high catenary at existing level of 800/1000
- High Amperes always have additonal type in series
- Some types are needed only if the catenary is too much, only keep good types
- Stray currents must adhere to directions from the given documents – A 10 milli-ampere limit for track circuit <100 meters – A 100 milli-ampere limit for other types
Other items for Railways
- To defend a type coil shall be present always, with special resistant
RE Area info for railways
Both Rails for Traction need bonds
- No mast OHE to get to rails ever
- Cabling and bonding must be top points
- Unit shall test Harmonies
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