Operation “B” Part – 1

Abnormal Sign:

• Close BLDJ and press BLRDJ.
• LSDJ extinguished, UA needle deviated, auxiliary sound heard, LSCHBA also extinguished.
• After releasing BLRDJ, while counting 15 seconds, LSDJ re-glows (after 5.6 seconds of extinguishing of LSCHBA).
• If there is any fault in MPH, MVSL-1, MVSL-2, QPH, QVSL-1, QVSL-2, and QCVAR normally opened interlock in Q118 branch, DJ will trip within 15 seconds after releasing BLRDJ.

Causes:

• MVSL-1 not working or defective QVSL-1.
• MVSL-2 not working or defective QVSL-2.
• Defective QCVAR N/O interlock.
• MPH not working or defective QPH.

Troubleshooting:

Check for any smell, smoke, or fire from MVSL-1 & 2, MPH:

• If any, use fire extinguishers and work with precautions.

If no abnormality:

• Place HVSL-1 & HVSL-2 on “3” position.
• Place HQCVAR & HPH on “0” position.
• Close DJ.
• Check the working of MVSL-1 and MVSL-2.
  • If any one of them is not working, isolate the concerned MVSL (also isolate MVMT & MVSI) and work onwards with 50% of the maximum load permitted.

If MVSL-1 and MVSL-2 are working normally:

• Clear section duly observing transformer oil.
• Trip DJ and place HVSL-1 on position “1”.
• Close DJ and wait for 15 seconds.
  • If DJ trips, conclude QVSL-1 is defective.
    • Place HVSL-1 on “3”, normalize the other switches (HVSL-2, HQCVAR & HPH), and work onwards duly watching the working of VSL-1 blower.
  • If DJ holds, trip DJ and place HVSL-2 on position “1”.
    • Close DJ and wait for 15 seconds.
      • If DJ trips, conclude QVSL-2 is defective.
        • Place HVSL-2 on “3”, normalize the other switches (HQCVAR & HPH), and work onwards duly watching the working of VSL-2 blower.
  • If DJ holds, trip DJ and place HPH on position “1”.
    • Close DJ and wait for 15 seconds.
      • If DJ trips, MPH or QPH is defective, contact TLC.
      • If DJ holds, conclude defect is with QCVAR N/O I/L.
        • Keep HQCVAR on “0” and work onwards duly watching ARNO.

Note:

• If both MVSL-1 and MVSL-2 are not working, contact TLC.
• If MPH equalizing pipeline is leaking:
  • Stop the train, open DJ, take safety measures and try to arrest the leakage with insulation tape or by some other means.
  • If the leakage is stopped, energize the loco and resume traction.
  • Otherwise, trip DJ, place HPH on “0”, ensure the TFR oil level above 150°C, clear the block section with restricted current (920A for first 5 min and then 500A for continuous), and contact TLC for advice.
• If MPH equalizing pipeline is broken:
  • Stop the train, open DJ, take safety measures and crush the copper pipe at both ends with the help of cutting-pliers and ensure that there is no oil leakage.
  • Place HPH on “0”, ensure the TFR oil level above 150°C, clear the block section with restricted current (920A for first 5 min and then 500A for continuous), and contact TLC for advice.