Enhancement of earthing reliability by providing additional MF earth, provision of SPDs and shifting of SPDs to 0.5mtrs to MEEB as per RDSO TAN guidelines at 60 stations over MYS division.

A-SCHEDULE A[SOR 2025]

Chapter 6: Excavation of cable trench in all kinds of soil except hard rocky areas including clearing of roots of trees, rocks, bushes etc. to a depth of 1.0 Mtrs and to a width of 0.3 Mtrs. (Laying of cables is not included in this item). Above/

Chapter 6: Refilling of cable trench 1m depth by 0.3m width throughout, with earth after laying of cables, and consolidating the trench by ramming and levelling. Above/

Chapter 6: Concreting of cable laid in the trench or GI pipe/DWC/HDPE pipe in which cable is already laid to a size of 300x300mm with 1:3:6 mortar. (All the materials required for the work should be supplied by the contractor). Above/

Chapter 6: Laying of Signaling/Power/Telecommunication cables as per cable plan in cable trenches, masonry ducts, RCC Pipes, DWC pipes, GI Pipes etc. (Supply of cables is not included in this item). Above/

Chapter 15: Supply of Basic material to construct Unit maintenance free earth as per RDSO spec. No. RDSO/SPN/197 Ver.1.0 or latest. consisting of a) copper bonded steel electrode of 3.0m long, 17.0 mm dia with copper bonding thickness mini 250 micron and UL listed and marked--1 no. b) Earth enhancement compound of RDSO approved brand supplied in sealed bags of min 10 Kgs-03 No. c) Copper strip of 150X25x6mm to terminate earth rod-1 No. d) Copper strip of 300X25x6mm (MEEB)-1 No. e) Copper strip of 150X25x6mm (SEEB)-1 nos Above/

Chapter 15: Installation of Unit Maintenance Free Earth Pit as per RDSO specification No.RDSO/SPN/197 Ver.1.0 or latest and as per Technical Specification Above/

Chapter 15: Supply of Basic material to construct a Maintenance Free Ring Earth with 08 Four Pits (For Interlocked Station, LC Gates/IB Signalling Application) for achieving less than one Ohm as per as per RDSO Spec No. RDSO/SPN/197 Ver.1.0 or latest consisting of a) copper bonded steel electrode of 3.0m long, 17.0 mm dia with copper bonding thickness mini 250 micron and UL listed and marked--4 no. b)Earth enhancement compound of RDSO approved brand supplied in sealed bags of min 10 Kgs-12 No. c) Copper strip of 150X25x6mm to terminate earth rod-4 No. d) Copper strip of 300X25x6mm (MEEB)-4 No. e) Copper strip of 150X25x6mm (SEEB)-4 no's Above/

Chapter 15: Installation of Maintenance Free Ring Earth with Four Pits (For Interlocked LC Gates/IB Signalling Application) as per RDSO specification No. RDSO/SPN/197 Ver.1.0 or latest and as per Technical Specification. Above/

Chapter 15: Supply of 25x3 mm Cu tape. Above/

Chapter 15: Installation of 25x3 Sq mm Cu tape. Above/

Chapter 15: Supply of 35 Sq mm Multi-strand Single Core PVC insulated Copper Cable as per IS: 694 for connecting Main Earth Electrode to MEEB in equipment room. Color: Green. Above/

Chapter 15: Supply of 16 Sq mm Multi-strand Single Core PVC insulated Copper Cable as per IS: 694 for connecting MEEB to SEEB and SPDs to MEEB. Color: Green. Above/

Chapter 15: Supply of 10 Sq mm Multi-strand Single Core PVC insulated Copper Cable as per IS: 694 for connecting SEEB to all equipment's. Color: Green. Above/

Chapter 15: Installation of 35 sqmm single core Cu cable for connecting main earth electrode to equipment room (routing through GI pipe/DWC/HDPE/PVC conduit pipe of suitable size as per site requirement Above/

Chapter 15: laying of 16 sqmm Cu cable/10 sqmm Cu cable between BRC and racks. 16 The work includes mechanical connection by providing two Cu lugs and two steel screws, drilling to two holes and removal of powder coating on rack body, thimbles ties, etc. and routing the same as per site requirements. Above/

Chapter 15: Supply of 50x6 mm GI Tape for interconnecting earth electrodes. Above/

Chapter 15: Laying of 50x6 mm GI Tape for interconnecting earth electrodes. Above/

Chapter 15: Supply of Conventional lightening protection system consisting of Franklin rod of 16mm dia, single prong spike made of copper of length 600mm. Appropriate reducer/coupler for connecting Franklin rod and GI mast, GI mast approximately 1.5-inch dia, 6 mtr length with flanges for installation of franklin rod with all supporting accessories, such as guy rope, U-bolt, thimble, adjustable clamp, D-shakle, hook etc. Above/

Chapter 15: Installation of Conventional lightening protection system consisting of Franklin rod, appropriate reducer/coupler, flanges and GI mast with all supporting accessories such as guy rope (6 mm GI wire), U-bolt, thimble, adjustable clamp, D-shakle hook, etc. Above/

Chapter 15: Supply of Lightening and surge arrester of class B and C suitable for single phase supply in TT network as per RDSO spec.no. RDSO/Spn/165/2023 ver 4.0 amd.1 or latest. Above/

Chapter 15: Installation and commissioning of Class B and C arresters as supplied. 22 These din rail mountable devices along with 63 amps HRC input fuse and fuse base shall be fixed in a wall mountable cabinet of size 450 x 250x150 mm made as MS steel of 20 gauge or better with IP31 protection and power coating. All the internal power wiring shall be made by using 10sq.mm cu cable. the PF contract of the class C arrestor shall also be wired using cable thickness of 2,5 sq.mm and terminated on a suitable terminal block. Above/

Chapter 15: Carrying out exothermic welding for various conductors as per requirement. Above/

Chapter 15: Exothermic welding materials (Cad weld or similar).

B-SCHEDULE B[NON-SOR]

CR Test Panel for Q Relay

Supply & Installation of Isolating spark Gap.