Hyderabad Division : Strengthening of Earthing and Surge Protection Systems for Reliable Signalling over Hyderabad Division.

Item Breakup - A-Schedule - A

Supply of Multi-strand, single core, copper Numbers 134.00 conductor 28/0.3 (28 wires, diameter of each wire 0.30mm) flexible wire coil as per Specn IS 694: 2010 or latest, IRS: S 76-89 Amd.3 or latest. Length of coil should be 100m. Colour to be specified by Engineer in charge. (COIL)

Supply of 35 Sq.mm PVC insulated multi- Metre strand, single core, copper conductor 277/0.4 (277 wires, diameter of each wire is 0.4mm) cable as per IS:694 or latest, IRS: 5 76-89 Amd.3 or latest. Cable to be supplied in 100- meter coil. Colour to be specified by Engineer in charge.

Supply of 16 Sq.mm PVC insulated, multi- Metre stand, single core, copper conductor 127/0.4 (127 wires, diameter of each wire is 0.4mm) cable as per IS: 694 or latest, IRS: S 76-89 Amd.3 or latest. Cable to be supplied in 100 meter coil. Colour to be specified by Engineer in charge.

Supply of 10 Sq.mm PVC insulated, multi- Metre strand, single core, copper conductor 140/0.3 (140 wires, diameter of conductor 0.3mm) cable as per IS: 694 or latest, IRS: S 76-89 Amd.3 or latest. Cable to be supplied in 100 meter coil.

Supply of Basic Material to construct unit Set Maintenance Free Earth as per Specn RDSO/SPN /197 Ver.1.0 or latest consisting of the following: a) Copper bonded steel electrode 3m long, 17mm diameter 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 minimum 10 Kgs - 3 Nos. c) Copper strip with dimensions 150 x 25 x 6mm to terminate earth rod - 1 No. d) Copper strip with dimensions 300 x 25 x 6mm Main Equipotential Earth Bus bar (MEEB) - 1 No. e) Copper strip of with dimensions 150x25x6 mm Sub Equipotential Earth Bus bar (SEEB) - 1 No. f) 35 Sq.mm multi-strand PVC insulated Copper Cable (15 Meter).

Supply interconnecting earth electrodes.

Supply of Electronic Earth Tester Model No. Numbers 4680B Meco Make or higher version or similar or better. The Earth tester shall be non-contact type without requirement of auxiliary electrodes and shall have 4 digit 9999 LCD Display with ground resistance range from 0.250 to 15000.

Supply of Electrostatic Rubber Matting of Sqm thickness 2mm as per IS-15652/2006 with suitable adhesive material. HYDERABAD DIVISION-S AND T/SOUTH CENTRAL RLY

Supply of Lightning and Surge Arrestors of Set Class B & C suitable for single phase supply in TT Network as per Specn RDSO/SPN/165/2023 Ver.4.0 amd-1 or latest and as recommended by RDSO letter No. STS/E/IPS/GENL, dt.27.01.06 (Amdt.5).

Supply of Lugs and Eyelets: Copper lugs l0 Numbers 2400.00 Sq.mm of reputed make. Total 12949351.00

Item Breakup - B-Schedule -B

Earthing and soldering of cable armour. (Per Each Cable)

Provision MS Flat connection from Earth pit to RMT LBs/Signals including supply and laying of MS Flat of size 40 X 6mm at site, supply of GI bolt of size M12 X 40mm with two Nuts along with two plain washers and one spring washer, drilling of holes in MS flat of different sizes at site, cutting with bending and twisting of MS Flat as required at site, painting of MS Flat with one coating of red oxide as primary and two coats of anti-corrosive black paint and drilling of holes in Location Boxes at site.

Welding for jointing MS Flat 6mm thick X Per Weld 1340.00 40mm width of different lengths strips connecting from Earth to Location Boxes/Signal post/Signal Unit for better continuity. Prior approval of welding material to be taken from Engineer in charge (Each Weld).

Routing and connecting all the equipments in RMT the equipment/Relay Room to MEEB/SEEB with 16/10 Sq.mm copper cable using copper lugs with stainless steel nuts and bolts and fixtures. The work includes laying and routing the copper cable in PVC pipes/conduits and ixing them on wall as directed by engineer in charge. PVC pipes/ conduits will be supplied by Rly.

Fabrication, conventional Earth to Signalling/Telecom equipments - Excavation of Earth and No. 6652 providing earth pipe of size 50mm Dia 3.5mm thick 2.0 m. long GI pipe of heavy quality with masonry tub constructed around at earth locations as ecified by site Engineer. Alternate layers of 30 Kgs-charcoal and 30 Kgs-common salt to be filled in the pit while closing. The pipe perforation etc., to be carried out as per Drg No. SK 10/10. The Earth pipe to be connected to the function with cable as supplied by Rlys. The reading should be painted on the masonry tub. The masonry tub of 300mm x 300mm x 300mm (along with Kundi) should be covered with cement slab.

Improvement of Earth resistance values to the Each existing conventional Earths by adding chemicals with alternate layers of 10 Kgs- charcoal and 10 Kgs-common salt as per instructions of Engineer in-charge. All men and materials shall be arranged by the Contractor (Per earth) HYDERABAD DIVISION-S AND T/SOUTH CENTRAL RLY

Provision of RCC Earth pit hollow box of size Numbers 1340.00 300 mmx300mmx300mm with 50mm wall thickness as per Drg No. SDO/RDSO/E&B/001 by using M20 Grade precast RCC. It includes fixing of Earth pits at various locations. (All the required men, material and transportation are to be arranged by Contractor).

Supply and erection of RCC precast slabs with Numbers 1340.00 hook to cover Earth pits of dimensions as shown in IRSEM Drg No. 19-D6. All the required materials for this work i.e. stones, cement, iron and sand etc. are to be supplied by Contractor).

Provision of Ring Earth by providing & Numbers 104.00 connecting conventional earths with copper catenary wire as required at site as per instructions site in charge. Excavation of Earth and providing Earth pipe of size 50mm Dia, 3.5mm thickness, 2.0m long GI pipe of heavy quality along ith masonry tub constructed around at earth locations as specified by site Engineer. Alternate layers of charcoal (30 Kgs) and common salt (30 Kgs) to be filled in each pit while closing the pipe perforation etc., to be carried out as per Drg No. G/SG/0912002. The masonry tub of 400x400x450mm, 50mm thickness should be cover with cement slab to be provided each conventional earth. Masonry tub shall be filled with river sand after completion of earthing. Conventional earths to be wrapped with catenary wires before excavated in earth long with use of proper clamps and nuts. All earths to be connected with each other by use of copper catenary wire or suitable cable provided by Rlys. Minimum two number Earth pipe to be connected inside the location/function with suitable cable (cable will supplied by Rlys). Excavations of trench of 0.5m minimum depth for inter connection of 4 conventional earths by catenary wire. Catenary wire should be welded through arc welding to the GI pipe with copper clamps. The earth reading, DOI & DOM should be painted on the masonry tub. (All the men and the materials to be supplied by the Contractor except catenary wire/Cable). HYDERABAD DIVISION-S AND T/SOUTH CENTRAL RLY

Installation of single Earth (Maintenance Free) Set including the following: Welding and fixing of copper tape (used as bus bar) welding of cadmium bronze cable to copper plate using material supplied. All the material supplied for mounting of copper tape, exothermic weld materials, tools and fixtures for welding copper tapes shall be arranged by contractor. a) Digging/Auguring/Boring of single earth pit of 100mm to 125mm Dia to the depth of approx. 2.8 meter. b) Insertion of 3.0 meter electrode and penetrating it at least 0.2 meter by pushing gently with sledge hammer where the natural soil is assumed. c) Filling of earth pit with earth enhancement compound (EEC) in slurry from and backfilling. d) Carrying out exothermic weld connection on single earth electrode to a copper tape of 150X25X6mm. e) Carrying out Exothermic weld connection on the copper tape of 150X25X6mm on earth electrode for connecting two 35 Sq.mm cables for redundancy. f) The exothermic welding material for bonding the earth system shall be procured from RDSO approved firms, which includes graphite moulds, clamps, weld metal powders. g) Digging a trench to a depth of at least 0.5 Mtr and run the two 35 Sq.mm earth conductor (procured against supply item) from earth pit to MEEB. h) Routing and termination of two 35 Sq.mm earth conductors in trench from earth pit to 300X25X6mm MEEB, which is to be fixed inside the equipment room with two insulation studs. i) 300X300X300mm (inside dimension) concrete earth pit with a concrete lid, approx 50mm thick with pulling hooks, shall be provided to cover the pit. Back side of the cover will be painted in black and date of the testing and earth resistance value shall be written.

Supply and installation of "FRANKLIN ROD" as Set per NFPA-780 Standards. Installation to be done as per SCR Drg No. 5777. It also includes connection of down conductor with Franklin Rod and running of down conductor through PVC pipes and connecting the same to nearby earth electrode. All material required for installation to be supplied by the Contractor.

Execution (Supply, transportation, installation Numbers 2006.00 and commissioning) of pin Brazing/Exothermic out weld connection for continuity bond across fish plates in DC Track Circuit area as per RDSO Specn No. IRS S-I 03/2004 or latest. (All equipments & material required for Brazing/ Welding of railhead continuity shall be arranged by the Contractor).

EMI/Earthing arrangements to achieve earth Numbers value less than 1 Ohm (minimum 8 Maintenance Free Earth) for El at Central Location or end Goomties for object controllers as per RDSO Specn as required for the El System as per Rly Board letter No. 2010/Sig/ SGF/El (Ansaldo), dt.22.06.11 or latest shall be followed. All materials shall be supplied by the Contractor including Maintenance Free Earthing. Maintenance Free Earthing material shall be inspected by RDSO. Balance material shall be inspected by Consignee.

Painting of Gate protection diagram. (Per Station Station) HYDERABAD DIVISION-S AND T/SOUTH CENTRAL RLY

Fixing of Tie Bar Fencing Panels supplied by Metre Rlys duly transporting to the site (Goomties/Mid section Locations) from Centralised location. Cutting, drilling, jointing with nut and bolts wherever required as per site requirement for protecting Goomties/Location boxes. After fixing of the tie bar, panels to be painted with two coats of aluminium paint and levelling the Earth wherever required. All required materials other than tie bar fencing panels should be arranged by the Contractor/Agency (Per Meter).

Excavation of pit to size of 450mmx 450mm x Numbers 600.00 450mm and concreting the same with 1:3:6 aggregate 20mm for erecting the tie bar fencing panels, curing and white washing the foundations.

Supply and fixing of different sizes of PVC RMT casing / Pipes as required by Rly at site by fixing / clamping to the wall for indoor wiring purposes. All the material required for fixing PVC casing / Pipes are to be supplied by Contractor.

Clearing jungle including uprooting of rank Sqm vegetation, grass, brush wood, trees and saplings of girth up to 30 cm measured at a height of 1 m above ground level and removal of cleared jungle to a distance of 50 m outside the periphery of the area cleared (Measurement is to be done as per area cleaned).

Clearing grass/garbage and removal of the Sqm rubbish up to a distance of 50 m outside the periphery of the area cleared (Measurement is to be done as per area cleaned).

Providing and laying vitrified floor tiles in Sqm different sizes with water absorption less than 0.08% and conforming to IS: 15622, of approved make, in all colours and shades, laid on 20mm thick cement mortar 1:4 (1 cement: 4 coarse sand), jointing with grey cement slurry @ 3.3 Kgs/Sq.m including grouting the joints with white cement and matching pigments etc., complete.

Excavation of trench, including marking of Route cable alignment, clearing of jungle, roots of Kilo trees, bushes, trial pits if required, refilling with Meter excavated soil, ramming and consolidation (RKM) after laying of cables complete to the finished item of work in all type of Soil (a) Depth of 1200 mm and width of 300mm - Size of Tile 500x500 mm.

Providing and laying in position cement cum concrete of specified grade including the cost of centring and shuttering: 1:3:6 (1 Cement: 3 coarse sand (zone-Ill): 6 graded stone aggregate 20 mm nominal size). Total 30881967.00

Item Breakup - C-Schedule -C

Supply of Professional Earth Resistance Tester Numbers with measuring range 0-20 ohms & higher. Resolution: 0.01 Ohms at 0-20 Ohms & 0.1 at 0-200 Ohms. Accuracy: +/- 2% supplied complete with test leads, spikes & simplified measurement probe. Also measures earth voltage upto 200V with accuracy of +/- 1%. Complies with EN/IEC 61010-1 CATIII 600V. Model Stanlay 521 or similar or better. Total 631581.84

Item Breakup - D-Schedule - D

Supply and fixing of GI Flat Full Location Box of Each size 1050x25x3mm as given in Drg No. RVNL/ S&T/SC/06/2016 to connect all cable armous to Earth point with suitable nuts/bolts as given below; a) GI nuts/bolts of size 8x25mm with two flat and on spring washer of 23 sets & b) GI nuts/bolts of size 12x40mm with two flat and one spring washer of 02 sets as per site incharge (Per Unit = Per LB). (Per Unit)

Supply and fixing of GI Flat Half Location Box of Each size 550x25x3mm as given in Drg No. RVNL/ S&T/SC/06/2016 to connect all cable armour to Earth point with suitable nuts/bolts as given below; a) GI nuts/bolts of size 8x25mm with two flat and on spring washer of 13 sets & b) GI nuts/bolts of size 12x40mm with two flat and one spring washer of 02 sets as per site incharge (Per Unit = Per LB). (Per Unit)

Supply and installation of Class C/D Surge Numbers 326.00 Protection Devices, 60V,VAL-MS 60AC ST as per RDSO/SPN/165/2004 & Amdt.5 & RDSO/SPN/ 165/2012 (Ver:3) (duly releasing of existing SPDs)..

Supply and installation of Class C/D Surge Numbers 196.00 Protection Devices, 120V, VAL-MS 120AC ST as per RDSO/SPN/165/2004 & Amdt.5 & RDSO/ SPN/165/2012 (Ver:3) Normal Voltage (U0): 60V-110V AC/DC (duly releasing of existing SPDs).

Supply and installation of Class C/D Surge Numbers 236.00 Protection Devices, 230V, VAL-MS 230AC ST as per RDSO/SPN/165/2004 & Amdt.5 & RDSO/ SPN/165/2012 (Ver:3) (duly releasing of existing SPDs).

Supply and laying of 50 Sq.mm insulated Metre copper cable in suitable PVC pipe. All other materilals required for installation to be arranged by the Contractor).

Lime wash on walls/foundations at site and Sqm directed by site incharge one coat with quick lime of approved quality.

Painting and writing the particulars on Numbers 1675.00 Signalling and Telecom assets like implantations, Nos., DOI, DOH and Earth Resistance values etc. (including paint) (Quantity unit in per Asset). HYDERABAD DIVISION-S AND T/SOUTH CENTRAL RLY

Supply and installation of Smart Earth Numbers Monitoring System which can offer real time monitoring of resistance remotely. The System shall allow continuous and immediate Surveillance of resistance levels, providing valuable alert insights and information data from various locations, in real time without the need for physical presence (IOT- Based device, including mobile application software for real- time monitoring based on clamp-type technology) Accuracy - +/-2% @ +/-3 Degrees at temp (20 +/-5 below 70% RH), Degree of protection-IP65, Response time <=50ns, Range 0.01 Ohm - 100 Ohm, Sensor Clamp Type, resolution - 0.001 Ohm or equivalent, Mounting - Wall Mount. Total 7512792.55

Item Breakup - E-Schedule -E

Supply and installation of Class B SPD Set progressive type indication type and Class C SPD of S&T installations complete with IP 55/65 enclosure (Polysterene/Polycarbonate). SPD shall confirm to RDSO Specn RDSO/SPN/165/2012 Ver.3.0 or latest with IP 65 or better rating polycarbonate box with transparent cover for mounting and connected wire as per RDSO Specn. Make: JMV or similar or better.

Supply of Electrostatic Dicharge (ESD) wrist Numbers 200.00 band. Total 1956000.00