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      Indian Railways was facing the problem of dropping of Traction Motor in Conventional Locomotives due to breakage of Top nose stay, which is the primary support of Suspension for Axle hung Nose suspended Traction Motors(TM) of Conventional Locomotives. As there is no indication for crew in the Conventional locomotive regarding dropping of TM on run, there were cases of derailment with loss of human life and Railway property.

       ELS/BZA/SCR has developed TMDDS on recommendation of Railway Board after derailment of 15633 Bikaner-Guwahati Exp on 13.01.2022. Railway Board recommended vide Recommendation 7.2 of Lr. No: 2020/Elect.(TRS)/113/Misc. Safety,  Dtd:- 15-03-2022 to Implement an Electrical  System to detect intermediate position when Traction motor comes to rest on Bogie Transom with its lifting lugs in case of failure of top nose stay.

       RDSO found “Scheme for TMDDS“, of ELS/BZA more appropriate after examining the proposals of ELS/BZA, ELS/KZJ & ELS/SRC and approved this system in to-to vide “Modification Sheet No RDSO/2022/EL/MS/0487 Rev 0 Dtd. 21.05.2022. ELS/BZA scheme, has a system by which LP/ALP are alerted through signaling lamp (LS Traction Motor) & Buzzer sound in Cab followed by DJ tripping with automatic emergency brake application via QEMS Relay by dropping of BP to zero and an event will be displayed in MPCS display that “DJ tripped via BPEMS”

Source : South Central Railway CMS Team Last Reviewed : 14-12-2023  

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