Podcast
Questions and Answers
Which locomotive has the highest horsepower output?
Which locomotive has the highest horsepower output?
- WAP4
- WAP1
- WAP5
- WAG9 (correct)
What is the maximum service speed of the WAP5 locomotive?
What is the maximum service speed of the WAP5 locomotive?
- 160 km/h (correct)
- 130 km/h
- 135 km/h
- 140 km/h
Which locomotive can carry the most coaches at a speed of 130 km/h?
Which locomotive can carry the most coaches at a speed of 130 km/h?
- WAP5 (correct)
- WAP4
- WAP6
- WAP3
What is the axle load of WAP4?
What is the axle load of WAP4?
Which locomotive has the lowest continuous tractive effort at 72 km/h?
Which locomotive has the lowest continuous tractive effort at 72 km/h?
At what speed can WAP6 operate a maximum of 12 coaches on a 1/200 grade?
At what speed can WAP6 operate a maximum of 12 coaches on a 1/200 grade?
Which locomotive has the highest continuous tractive effort at its rated speed?
Which locomotive has the highest continuous tractive effort at its rated speed?
What is the unsprung mass per axle for WAP5?
What is the unsprung mass per axle for WAP5?
Which locomotive can operate at the lowest continuous speed?
Which locomotive can operate at the lowest continuous speed?
Which locomotive has the same horsepower as WAP3?
Which locomotive has the same horsepower as WAP3?
How much can the total running time of the existing HWD-NDLS Rajdhani Express be reduced when run by a WAP5 loco at the existing booked speed?
How much can the total running time of the existing HWD-NDLS Rajdhani Express be reduced when run by a WAP5 loco at the existing booked speed?
If the full speed potential of a WAP5 loco (booked speed of 150 km/h) is utilized for the HWH-NDLS Rajdhani Express, what is the total reduction in running time?
If the full speed potential of a WAP5 loco (booked speed of 150 km/h) is utilized for the HWH-NDLS Rajdhani Express, what is the total reduction in running time?
How many coaches can the HWH-NDLS Rajdhani Express theoretically enhance to while maintaining the existing total running time when hauled by a WAP5 loco?
How many coaches can the HWH-NDLS Rajdhani Express theoretically enhance to while maintaining the existing total running time when hauled by a WAP5 loco?
What is the power output of the WAP5 loco for supply to the coaches?
What is the power output of the WAP5 loco for supply to the coaches?
By how much can the running time of the existing 9-coach Shatabdi Express be reduced if hauled by a WAP5 loco with enhanced booked speed?
By how much can the running time of the existing 9-coach Shatabdi Express be reduced if hauled by a WAP5 loco with enhanced booked speed?
What is the total number of additional coaches that can be added to the existing 9-coach NDLS-BPL Shatabdi Express at existing booked speed without affecting total running time?
What is the total number of additional coaches that can be added to the existing 9-coach NDLS-BPL Shatabdi Express at existing booked speed without affecting total running time?
What is the maximum tractive effort (T.E) of the WAG9 locomotive?
What is the maximum tractive effort (T.E) of the WAG9 locomotive?
Which axle load is associated with a speed of 51.1 km/h?
Which axle load is associated with a speed of 51.1 km/h?
Which of the following best describes a primary operational advantage of the WAP5 loco?
Which of the following best describes a primary operational advantage of the WAP5 loco?
For a balancing speed with a 4700t BOXN load at level grade, how many locomotives are required to achieve a speed of greater than 100 km/h?
For a balancing speed with a 4700t BOXN load at level grade, how many locomotives are required to achieve a speed of greater than 100 km/h?
Which aspect is associated with the reliability of 3-phase locomotives compared to others?
Which aspect is associated with the reliability of 3-phase locomotives compared to others?
For which gradient does the number of required locomotives for starting remain consistent across all types tested?
For which gradient does the number of required locomotives for starting remain consistent across all types tested?
What is the upsprung mass per axle for the locomotive with a maximum T.E of 45.0 t?
What is the upsprung mass per axle for the locomotive with a maximum T.E of 45.0 t?
What range of maximum electrical braking effort is noted at speeds between 27-36 km/h?
What range of maximum electrical braking effort is noted at speeds between 27-36 km/h?
At which speed is the axle load of 20.5 t recorded?
At which speed is the axle load of 20.5 t recorded?
Which of the following locomotives shows a distinct advantage in starting capability due to better adhesion?
Which of the following locomotives shows a distinct advantage in starting capability due to better adhesion?
What is the continuous tractive effort (Cont.T.E) of the locomotive associated with the speed of 44.0 km/h?
What is the continuous tractive effort (Cont.T.E) of the locomotive associated with the speed of 44.0 km/h?
Which condition prevents certain locomotives from hauling at a given speed on a 1 in 200 grade with a curvature of 2°?
Which condition prevents certain locomotives from hauling at a given speed on a 1 in 200 grade with a curvature of 2°?
What is the minimum upsprung mass per axle for any of the locomotives listed?
What is the minimum upsprung mass per axle for any of the locomotives listed?
What is a major advantage of the on-board fault diagnostics system in WAP5/WAG9 locomotives?
What is a major advantage of the on-board fault diagnostics system in WAP5/WAG9 locomotives?
What percentage of energy savings has been experienced with WAP5/WAG9 locomotives compared to conventional methods?
What percentage of energy savings has been experienced with WAP5/WAG9 locomotives compared to conventional methods?
How does the power factor of 3-phase locomotives compare to conventional locomotives?
How does the power factor of 3-phase locomotives compare to conventional locomotives?
What is the effect of improved power factor in context to conductor size?
What is the effect of improved power factor in context to conductor size?
What is the primary benefit of using PWM converter technology in locomotives?
What is the primary benefit of using PWM converter technology in locomotives?
What contributes to the lower maintenance requirement of 3-phase locomotives?
What contributes to the lower maintenance requirement of 3-phase locomotives?
How does the unsprung mass of WAP5 locomotives compare to WAP4 locomotives?
How does the unsprung mass of WAP5 locomotives compare to WAP4 locomotives?
What benefit does a lower unsprung mass provide for WAP5 locomotives?
What benefit does a lower unsprung mass provide for WAP5 locomotives?
What effect does the use of an induction motor have in 3-phase locomotives?
What effect does the use of an induction motor have in 3-phase locomotives?
What is one of the main advantages of the lower maintenance of 3-phase locomotives?
What is one of the main advantages of the lower maintenance of 3-phase locomotives?
Which locomotive is capable of operating the highest number of coaches at a speed of 160 km/h?
Which locomotive is capable of operating the highest number of coaches at a speed of 160 km/h?
What is the continuous tractive effort of the WAG9 locomotive at its rated speed of 73 km/h?
What is the continuous tractive effort of the WAG9 locomotive at its rated speed of 73 km/h?
Which locomotive exhibits the lowest maximum service speed?
Which locomotive exhibits the lowest maximum service speed?
Which of the following locomotives has a higher axle load than WAP5?
Which of the following locomotives has a higher axle load than WAP5?
Which continuous speed is associated with the WAP3 locomotive?
Which continuous speed is associated with the WAP3 locomotive?
What is the maximum starting tractive effort (TE) of the WAP4 locomotive?
What is the maximum starting tractive effort (TE) of the WAP4 locomotive?
Which locomotive has the highest continuous horsepower output at rail?
Which locomotive has the highest continuous horsepower output at rail?
Which of the following locomotives has a lower unsprung mass per axle compared to WAP4?
Which of the following locomotives has a lower unsprung mass per axle compared to WAP4?
What is the maximum speed potential of the WAG5H locomotive?
What is the maximum speed potential of the WAG5H locomotive?
Which locomotive is designed to handle 22 coaches at a speed of 130 km/h?
Which locomotive is designed to handle 22 coaches at a speed of 130 km/h?
What effect does utilizing the full speed potential of the WAP5 loco have on the total running time of the HWH-NDLS Rajdhani Express?
What effect does utilizing the full speed potential of the WAP5 loco have on the total running time of the HWH-NDLS Rajdhani Express?
To which gradient does the table indicate the minimum number of locomotives required for starting is always 1 for a 4700 t BOXN?
To which gradient does the table indicate the minimum number of locomotives required for starting is always 1 for a 4700 t BOXN?
If the HWH-NDLS Rajdhani Express's running time is maintained at existing booked speed while using a WAP5 loco, what is the maximum number of coaches it can theoretically be enhanced to?
If the HWH-NDLS Rajdhani Express's running time is maintained at existing booked speed while using a WAP5 loco, what is the maximum number of coaches it can theoretically be enhanced to?
What is one operational advantage of the WAP5 loco that reduces the need for power cars?
What is one operational advantage of the WAP5 loco that reduces the need for power cars?
How many locomotives are required for starting on a 1 in 100 gradient for a 5055 t BOXN?
How many locomotives are required for starting on a 1 in 100 gradient for a 5055 t BOXN?
What is a characteristic of 3-phase locomotives in comparison to others?
What is a characteristic of 3-phase locomotives in comparison to others?
For starting a freight train with a grade of 1 in 70, how many locomotives are typically required for a 4700 t BOXN?
For starting a freight train with a grade of 1 in 70, how many locomotives are typically required for a 4700 t BOXN?
What is the impact of using a WAP5 loco on the running time of the existing 9-coach Shatabdi Express?
What is the impact of using a WAP5 loco on the running time of the existing 9-coach Shatabdi Express?
What is a significant benefit realized from the WAP5's power factor?
What is a significant benefit realized from the WAP5's power factor?
What is the theoretical effect of adding coaches to the NDLS-BPL Shatabdi Express while maintaining total running time?
What is the theoretical effect of adding coaches to the NDLS-BPL Shatabdi Express while maintaining total running time?
What is a significant benefit of the on-board fault diagnostics system in WAP5/WAG9 locomotives?
What is a significant benefit of the on-board fault diagnostics system in WAP5/WAG9 locomotives?
How do WAP5/WAG9 locomotives contribute to energy savings?
How do WAP5/WAG9 locomotives contribute to energy savings?
What is a consequence of the improved power factor in 3-phase locomotives?
What is a consequence of the improved power factor in 3-phase locomotives?
What advantage does the PWM converter technique offer in 3-phase locomotives?
What advantage does the PWM converter technique offer in 3-phase locomotives?
What impact does the absence of commutators and power contactors have on 3-phase locomotives?
What impact does the absence of commutators and power contactors have on 3-phase locomotives?
In terms of unsprung mass, how do WAP5 locomotives compare with WAP4 locomotives?
In terms of unsprung mass, how do WAP5 locomotives compare with WAP4 locomotives?
What is one of the key benefits of utilizing an induction motor in 3-phase locomotives?
What is one of the key benefits of utilizing an induction motor in 3-phase locomotives?
What drawback can be minimized due to the improved power factor in 3-phase locomotives?
What drawback can be minimized due to the improved power factor in 3-phase locomotives?
What is one of the primary advantages attributed to the operation of 3-phase locos at near unity power factor?
What is one of the primary advantages attributed to the operation of 3-phase locos at near unity power factor?
How do the maintenance aspects of 3-phase locomotives influence their performance?
How do the maintenance aspects of 3-phase locomotives influence their performance?
What is the continuous tractive effort (Cont.T.E) for a locomotive operating at a speed of 50.0 km/h?
What is the continuous tractive effort (Cont.T.E) for a locomotive operating at a speed of 50.0 km/h?
At what speed can a locomotive with a 21.0 t axle load maintain an operation on a level grade with only 1 locomotive?
At what speed can a locomotive with a 21.0 t axle load maintain an operation on a level grade with only 1 locomotive?
Which locomotive shows the highest maximum traction effort (T.E) listed?
Which locomotive shows the highest maximum traction effort (T.E) listed?
What is the minimum balancing speed for a freight train with a 4700t BOXN load required to operate on a 1 in 200 grade with a curvature of 2°?
What is the minimum balancing speed for a freight train with a 4700t BOXN load required to operate on a 1 in 200 grade with a curvature of 2°?
What is the maximum electrical braking effort at speeds between 27-36 km/h for the locomotives listed?
What is the maximum electrical braking effort at speeds between 27-36 km/h for the locomotives listed?
Which option indicates an axle load associated with the highest maximum tractive effort (T.E)?
Which option indicates an axle load associated with the highest maximum tractive effort (T.E)?
What is the upsprung mass per axle for the locomotives achieving a continuous tractive effort of 30.8 t?
What is the upsprung mass per axle for the locomotives achieving a continuous tractive effort of 30.8 t?
Which parameter contributes significantly to the starting capability of the WAG9 locomotive?
Which parameter contributes significantly to the starting capability of the WAG9 locomotive?
What speed is necessary to operate a locomotive with a 20.0 t axle load on a 1 in 200 grade with a 2° curvature?
What speed is necessary to operate a locomotive with a 20.0 t axle load on a 1 in 200 grade with a 2° curvature?
What is the maximum tractive effort observed for a freight locomotive operating at 44.0 km/h?
What is the maximum tractive effort observed for a freight locomotive operating at 44.0 km/h?
Flashcards
WAP5 locomotive performance
WAP5 locomotive performance
WAP5 locomotives have superior traction and adhesion compared to older models, shown in Table 10.1.
WAP5 capacity (passengers)
WAP5 capacity (passengers)
WAP5 passenger locomotives can carry 26 coaches at 135 km/h, among other configurations.
WAP5 capacity (1/200 grade)
WAP5 capacity (1/200 grade)
WAP5 locomotives can haul 16 coaches on a 1/200 grade at 130 km/h, among other configurations.
WAP5 HP Output
WAP5 HP Output
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WAP5 max. service speed
WAP5 max. service speed
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WAP5 continuous speed
WAP5 continuous speed
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WAG5H continuous horsepower
WAG5H continuous horsepower
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WAG9 max speed
WAG9 max speed
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Comparative Performance Data
Comparative Performance Data
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Locomotive Types
Locomotive Types
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Locomotive Starting Capacity
Locomotive Starting Capacity
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WAP5 Locomotive
WAP5 Locomotive
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Rajdhani Express
Rajdhani Express
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Shatabdi Express
Shatabdi Express
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Booked Speed
Booked Speed
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Running Time
Running Time
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Grade (Railroad)
Grade (Railroad)
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3-Phase Technology
3-Phase Technology
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Power of 850 kVA
Power of 850 kVA
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Freight Train
Freight Train
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WAG9 Locomotive Advantage
WAG9 Locomotive Advantage
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Balancing Speed (Freight)
Balancing Speed (Freight)
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Starting Tractive Effort
Starting Tractive Effort
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Adhesion
Adhesion
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Freight Locomotive Speed
Freight Locomotive Speed
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Electrical Braking Effort
Electrical Braking Effort
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Axle Load
Axle Load
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Upsprung Mass
Upsprung Mass
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Max. Tractive Effort
Max. Tractive Effort
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Cont. Tractive Effort
Cont. Tractive Effort
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3-Phase Locomotive Advantage: On-Board Diagnostics
3-Phase Locomotive Advantage: On-Board Diagnostics
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3-Phase Locomotive Advantage: Regenerative Braking
3-Phase Locomotive Advantage: Regenerative Braking
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3-Phase Locomotive Advantage: Power Factor
3-Phase Locomotive Advantage: Power Factor
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3-Phase Locomotive Advantage: Reduced Harmonics
3-Phase Locomotive Advantage: Reduced Harmonics
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3-Phase Locomotive Maintenance: Reduced Components
3-Phase Locomotive Maintenance: Reduced Components
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3-Phase Locomotive Maintenance: Unsprung Mass
3-Phase Locomotive Maintenance: Unsprung Mass
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What does 'regenerative braking' mean?
What does 'regenerative braking' mean?
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What are the benefits of a near-unity power factor in a locomotive?
What are the benefits of a near-unity power factor in a locomotive?
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How does the PWM converter in a 3-phase locomotive improve train safety?
How does the PWM converter in a 3-phase locomotive improve train safety?
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What are the key maintenance advantages of 3-phase locomotives?
What are the key maintenance advantages of 3-phase locomotives?
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WAP5 Locomotive Capacity
WAP5 Locomotive Capacity
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WAP5 Locomotive Traction Effort
WAP5 Locomotive Traction Effort
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Locomotive Continuous Power
Locomotive Continuous Power
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Locomotive Maximum Speed Potential
Locomotive Maximum Speed Potential
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Locomotive Axle Load
Locomotive Axle Load
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Locomotive Unsprung Mass
Locomotive Unsprung Mass
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Locomotive Starting Tractive Effort
Locomotive Starting Tractive Effort
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Locomotive Continuous Tractive Effort
Locomotive Continuous Tractive Effort
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What is the importance of the WAP5 locomotive's TE-speed characteristic?
What is the importance of the WAP5 locomotive's TE-speed characteristic?
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Starting Capacity
Starting Capacity
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What is tractive effort?
What is tractive effort?
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What is adhesion?
What is adhesion?
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What is 'Upsprung mass'?
What is 'Upsprung mass'?
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What is 'Max. Tractive Effort'?
What is 'Max. Tractive Effort'?
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What is 'Cont. Tractive Effort'?
What is 'Cont. Tractive Effort'?
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What is 'Electrical Braking Effort'?
What is 'Electrical Braking Effort'?
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What is 'Axle Load'?
What is 'Axle Load'?
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What does '3-Phase Technology' mean?
What does '3-Phase Technology' mean?
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3-Phase Loco Advantage: On-Board Diagnostics
3-Phase Loco Advantage: On-Board Diagnostics
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3-Phase Loco Advantage: Regenerative Braking
3-Phase Loco Advantage: Regenerative Braking
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3-Phase Loco Advantage: Power Factor
3-Phase Loco Advantage: Power Factor
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3-Phase Loco Advantage: Reduced Harmonics
3-Phase Loco Advantage: Reduced Harmonics
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3-Phase Loco Maintenance: Reduced Components
3-Phase Loco Maintenance: Reduced Components
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3-Phase Loco Maintenance: Unsprung Mass
3-Phase Loco Maintenance: Unsprung Mass
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What is 'regenerative braking'?
What is 'regenerative braking'?
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Why is a near-unity power factor beneficial?
Why is a near-unity power factor beneficial?
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How do 3-phase locomotives improve train safety?
How do 3-phase locomotives improve train safety?
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Study Notes
Comparative Operating Performance
- WAP5 and WAG9 locomotives have superior speed and adhesive qualities compared to existing Indian locomotives.
- Comparative performance data for WAP5 locomotives are detailed in Table 10.1.
- Table 10.1 shows capacity on level and 1/200 grade for various types of locomotives, including the number of coaches and speed levels.
- HP output, maximum service speed, continuous speed, axle load, unsprung mass per axle, and maximum starting/continuous tractive effort (TE) are provided for each locomotive type.
Comparative Operating Performance Data (Freight Locomotives)
- Table 10.2 gives comparative operating performance data for freight locomotives.
- The table details continuous horsepower (HP), maximum speed potential, continuous speed, axle load, unsprung mass, maximum and continuous TE for WAG5H, WAG7, WAG7H, WAG6C, and WAG9 locomotives.
- Electrical braking effort is detailed for a range of speeds in various units.
- The table also shows balancing speed with 4700t BOXN load, grade, curvature, and number of locomotives for specific levels.
Comparative Starting Capabilities of Freight Locomotives
- Table 10.3 outlines the number of locomotives required to start freight trains based on different grades.
- The table shows the number of various locomotives needed to start trains on different inclines for varying freight loads (4700t and 5055t BOXN).
Highlights on Haulage Capabilities
- Running time for existing HWD-NDLS Rajdhani Express could reduce by about 30 minutes if hauled by a WAP5 locomotive at booked speed.
- Full speed potential (150 km/h) of a WAP5 locomotive could reduce running time by about 1 hour and 15 minutes.
- If running time needs to remain constant, a WAP5 could potentially handle a 29-coach Rajdhani Express at existing booked speeds.
- Running time for NDLS-JHS Shatabdi Express could reduce by 12 minutes with a WAP5 at enhanced speed (150 km/h).
- Up to 5 coaches can be added to the NDLS-BPL Shatabdi Express without impacting running time using a WAP5.
Operational Advantages
- WAP5 locomotives can provide 850 kVA (1-phase) power to coaches, potentially reducing the need for power cars.
- 3-phase locomotives generally have higher reliability, quicker fault diagnostics, and reduced on-line troubleshooting time.
- Regenerative braking (returning electrical power to the overhead system) in 3-phase locomotives can save energy (20-30%) compared to other systems.
- 3-phase locomotives operate at near-unity power factor, reducing power factor penalties and potentially requiring smaller overhead lines (OHE)
Maintenance Aspects
- 3-phase locomotives have lower maintenance costs and greater availability due to the absence of commutators and power contactors.
- Lower unsprung mass in WAP5 locomotives (around 2.69 tonnes) compared to WAP4 (around 4.2 tonnes) results in better riding quality and reduced track wear/damage.
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