Abnormal Sign: After taking 6 traction notches, while counting 15 seconds, LSDJ re-glows (DJ trips). Causes: All contactors C105, C106, and C107 not closed. Any one of the contactors of C107, C105, or C106 not closed. C107, C105, and C106 closed but their interlocks (I/Ls) defective parallel to GR 0-5. Troubleshooting: If C107, C105, and …
Abnormal Sign: After taking the 1st notch, while counting 15 seconds, DJ trips, and LSDJ re-glows. Causes: CCPT melting on the first notch (permitted through local instructions). MVSI-1 not working or defective QVSI-1. MVSI-2 not working or defective QVSI-2. VE-1 or Q52 earth fault (permitted through local instructions). If there is any defect with MVSI-1, …
Abnormal Sign: After closing DJ, wait for 15 seconds, close BLVMT. While counting 30 seconds, LSDJ re-glows (DJ trips). Causes: MVRH not working or defective QVRH. MVMT-1 not working or defective QVMT-1. MVMT-2 not working or defective QVMT-2. Troubleshooting: Check for any smell, smoke, or fire from MVMT 1 & 2, MVRH: If any, use …
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 …
(In VCB type 5-branches DJ provided locos only) Abnormal Sign: Close BLDJ and press BLRDJ. LSDJ extinguishes. UA meter needle deviates. Sound comes from the auxiliaries. LSCHBA also extinguishes. While releasing BLRDJ, LSDJ re-glows. Cause: Defective DJ N/O I/L on MTDJ branch. Troubleshooting: Take advice from TLC.
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Abnormal Sign:
Close BLDJ and press BLRDJ.
LSDJ extinguishes.
UA meter needle deviates.
Sound comes from the auxiliaries.
LSCHBA also extinguishes.
While releasing BLRDJ, LSDJ re-glows.
Explanation:
While closing DJ, if there is any earth fault or overcurrent in the auxiliary power circuit, or if the pressure drops below the QPDJ set value, or there is a cut in the MTDJ coil, the MTDJ coil will de-energize and DJ will trip immediately after closing.
Abnormal Signs:
Close BLDJ, press BLRDJ: Attempting to close the main circuit breaker (DJ).
LSDJ extinguishes: DJ closes.
UA needle deviates: Indication of auxiliary power activity.
Auxiliary sound may or may not be heard: Audible indication of auxiliary machinery starting.
LSCHBA does not extinguish: Specific indicator light does not turn off.
LSDJ glows again after 5.6 sec (DJ trips) before BLRDJ is released: DJ trips shortly after being closed.