Enhancing Reliability of Signalling System by providing MSDAC in Parallel to DC track circuits at Failure prone yard of MEP Station on Kota Division

Supply of QNA1 (AC immunised relay), 8F- 8B/12F-4B , 24VDC along with plug board (Base plate), retaining clips and connectors conforming to BRS:931A, IRS:S34 & IRS:S23

Supply of QSPA1, 24VDC, Slow to pick up, 8F-4B along with plug board (Base 43 plate), retaining clip and connectors conforming to BRS:933A, IRS:S60 & IRS:S34. (Material inspected by RDSO)

Supply of Relay plug in type styleQL1 magnetically latched neutral linerelay, 24 V DC, Metal to CarbonContacts complete with plug board,retaining clip & Connectorsconforming to BRS: 935A, IRS: S@45"38@ IRS: S-23 or latest 11F/4B Front &Back contacts for interlocking codefor this unit shall be ABDEG.

Supply of Double Walled Corrugated (DWC) pipe made up of High Density Poly Ethylene (HDPE) of size 103/103.5 mm inner dia and 120 mm outer dia in 6 Mtr straight length as per Britsh Standard No. BSEN 50086-1 and BSEN 50086-2-4 and BIS draft Specification Doc No. ETD 14(5071) and ETD 14(5072) along with one coupler per every 6 meters.

Supply & Installation and testing of maintenance free earth consisting as per RDSO specification No.RDSO/Spn/197/2016 with latest amendments and Latest RDSO TAN 3006 dated:08/01/2025 consisting of single earth pit which includes supply of 35Sq. mm / 16 Sq.mm / 10Sq.mm multistrand single core PVC insulated copper cable asper IS 694 for connecting main earth electrode to MEEB in the equipment room in duplicate as per manufacturers recommendation and as per RDSO specification as follows: As per Drg noSDO/RDSO/E&B/001 Dated19.09.08Set223471.48 a)Copper bonded staeel electrode of 3.0Meter long,17mm dia with copper bonding thickness of minimum 250 microns and UL listed andmarked - 1No. b) Earth enhancement compound of RDSO approved brand supplied in sealed bag of minimum 10Kg. - 3Nos. c) Copper strip of 150 x 25 x 6mm to terminate earth rod - 1No. d) Copper strip of 300 x25 x 6 mm (MEEB) - 1No. e)Copper strip of 150 x 25 x 6mm (SEEB) - 1No. f)Digging/Auguring/Borring ofsingle earth pit of 100mm to125mm dia to the depth of approximate 2.8M g) Insertion of 3 Mtr electrode and penetrating it at least 0.2 Mtr. By pushing gently with sledge hammer where the neutral soilis assumed. h) Filling of earth pit with earth enhancement compound (EEC) in slurry form and back filling. i)Carrying out exothermic weld connection of single earth electrode to a copper tape of150 x 25 x 6 mm j) Carying out exothermal weld connection on the copper tapeof 150 x 25 x 6 mm on earthe electrode for connecting two35 Sq.mm cable for redundancy k) The exo thermal welding material for bonding the earth system shall be procured from RDSO approved firms which include graphite moulds, clamps, weld metal powder. l) 300 x 300 x 300mm (inside dimensions)concrete earth pit with aconcrete lid approximately50mm thick with pulling hook sshall be provided to cover thepit. Back side of the cover willbe painted in black and date of testing and average resistance value shall be written. Note: The value of earth resistance per DP shall not be more than 1 ohm, for achieving this value if more than one no. of earth pits are required then the same will be provided by contractor itself, no extra payment will be made for that.

Supply of powder coated Relay Rack Assembly of Complete With Scaffolding, Fixtures and accessories including MS Bars for fixing of relay plug board, string rods fuse strips with bracket,11 Way Bus Bars with cover and mounting brackets, runway for cable/wires frame base assembly with IDF pillar etc. Siemens type & as per extant practice on W.C.Rly. Typical part list as per Annexure attached and Rack arrangement as per Sketch No SK -727 and Rack plan as approved by Engineer incharge.

Supply of powder coated Main Cable Termination rack of 1 Way complete with scaffolding, fixtures & accessories including square bars for mounting 8-way terminal / WAGO - make terminal blocks, ladders, string rods, frame, base assembly, insulators, J bolt, nut/bolts & fasteners (Bakelite strips) etc. Siemens type or equivalent & as per extant practice on W.C. Rly. Typical part list as per Annexure-I and rack arrangement shall be as per sketch SK- 727. Rack should be made of first class steel powder coated painting and rack manufacturer's certificate should be submitted. All runway for cables / wires shall be provied with PVC sleeve of proper size.

Supply of Fault analysis equipment along with necessary software required in connection with MSDAC system as per specification : HP Laptop or similar . 12th gen Core i7, 12 GB RAM, 1 TB HDD Window 11 Professional 64. or Latest

Supply and Installation of OFC joint enclosure and splicing of Optic fiber cable (48 fibres) and testing

Supply of Thermo shrink Jointing Kit for jointing underground 0.9 mm dia. cond. 4/6 quad cables as per specn No. IRS: TC- 77/2012 (Rev.3.0) with Amend. 1, 2 & 3 or latest.