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Tuesday, 8 May 2018

QOP-1 tripped and target can be reset

 QOP-1 tripped and target can be reset

Action to be taken 

a) Check for any smoke, burning smell, flash/weld or any abnormality in transformer terminals, RC damping panel, ATFEX,RSI-1,SL-1 (L1, L2, L3 J1, CTF-1,QD1in BA1 panel),T.M 1, 2, 3, U1,U2,A3,(CTF2 in BA2 panel),(CTF3,Q20 C145 in BA3 panel), SJ and ammeter shunt. If everything is normal reset the relay target, if any abnormality, isolate the same and resume traction, otherwise contact TLC for further instructions. 
b) If everything is normal, try to reset the relay target and resume traction.  

c) If QOP-1 trips further after long interval, every time check the equipment mentioned above. If no abnormality, reset the target and resume traction.  

d) If QOP-1 trips frequently isolate TM 1, reset QOP 1, close DJ and resume traction. If QOP1 trips again, isolate TM2 and TM3 one by one and try. If QOP-1 is not tripping when HMCS-1in 2or3or4 continue traction with that traction motor in isolated condition and work with 5/6th of maximum permissible load.   e) If QOP-1 trips in all positions of HMCS-1, normalize HMCS1 to 1 position and place HQOP-1 in OFF position, reset target ,resume traction and follow the precautions.(refer 2.11) 

f)  If DJ trips again through QOP1 keep HOBA also in off, along with HQOP 1,reset the relay target and resume traction Check the traction motors for any banding failure at every stoppage

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