No Tension on Line
ABNORMAL SIGN While reclosing DJ, LSDJ extinguishes, UA meter not deviate, no sound from auxiliaries, LSCHBA does not extinguish and DJ trips A) Before releasing BLRDJ in ARNO locos B) On releasing BLRDJ in SIV locos CAUSES:
1. No supply in OHE.
2. OHE damaged due to derailment/infringement.
3. OHE wire cut.
4. Pantograph not touching the OHE properly.
5. Pantograph entanglement.
6. Roof bar cut.
7. Foreign body on loco roof.
8. VCB flexible shunt cut.
9. Abnormality in HT2 compartment.
10. Open circuit in transformer windings.
Troubleshooting
a) If sudden BP Pressure drops and followed by no tension, switch ON flasher, stop the train and check the formation. If any infringing is noticed, stop and protect the train as per G & SR.
b) If BP Pressure is normal, check for any abnormality in the track ahead (Adjacent train formation may be infringing the track). If so, stop the train immediately and act as per G & SR.
c) During continuous No Tension at night, watch for any obstruction and stop the train and contact TPC/TLC and act per his instructions. check the roof equipment, if roof bar is cut or pantograph not touching OHE try by other pantograph
d) If any foreign body on loco roof or cut in OHE immediately contact TLC
e) Check for any abnormality in HT2 compartment if noticed inform TLC.
f) If everything normal, try to close DJ, if still no tension prevails, lower both
pantograph inform TPC/TLC and wait for 5 min.
g) Raise the working pantograph.
h) If heavy flash is noticed while raising pantograph/closing DJ, lower pantograph and contact TLC.
i) If after raising pantograph with choo sound but still no tension tripping is experienced it may be due to VCB flexible shunt cut or cut in transformer windings. Inform TLC
j) If power is restored, resume traction.
Note: 1) The LP should pass the detailed information to TPC/TLC regarding the condition of heavy spark while raising pantograph or while closing DJ or no tension indication with minor spark with ‘choo’ sound for arranging relief loco. 2) If LP experiences continuous no tension for more than 3 minutes follow SR17.09(VII)(1)(ii)
ABNORMAL SIGN While reclosing DJ, LSDJ extinguishes, UA meter not deviate, no sound from auxiliaries, LSCHBA does not extinguish and DJ trips A) Before releasing BLRDJ in ARNO locos B) On releasing BLRDJ in SIV locos CAUSES:
1. No supply in OHE.
2. OHE damaged due to derailment/infringement.
3. OHE wire cut.
4. Pantograph not touching the OHE properly.
5. Pantograph entanglement.
6. Roof bar cut.
7. Foreign body on loco roof.
8. VCB flexible shunt cut.
9. Abnormality in HT2 compartment.
10. Open circuit in transformer windings.
Troubleshooting
a) If sudden BP Pressure drops and followed by no tension, switch ON flasher, stop the train and check the formation. If any infringing is noticed, stop and protect the train as per G & SR.
b) If BP Pressure is normal, check for any abnormality in the track ahead (Adjacent train formation may be infringing the track). If so, stop the train immediately and act as per G & SR.
c) During continuous No Tension at night, watch for any obstruction and stop the train and contact TPC/TLC and act per his instructions. check the roof equipment, if roof bar is cut or pantograph not touching OHE try by other pantograph
d) If any foreign body on loco roof or cut in OHE immediately contact TLC
e) Check for any abnormality in HT2 compartment if noticed inform TLC.
f) If everything normal, try to close DJ, if still no tension prevails, lower both
pantograph inform TPC/TLC and wait for 5 min.
g) Raise the working pantograph.
h) If heavy flash is noticed while raising pantograph/closing DJ, lower pantograph and contact TLC.
i) If after raising pantograph with choo sound but still no tension tripping is experienced it may be due to VCB flexible shunt cut or cut in transformer windings. Inform TLC
j) If power is restored, resume traction.
Note: 1) The LP should pass the detailed information to TPC/TLC regarding the condition of heavy spark while raising pantograph or while closing DJ or no tension indication with minor spark with ‘choo’ sound for arranging relief loco. 2) If LP experiences continuous no tension for more than 3 minutes follow SR17.09(VII)(1)(ii)
