PROVN OF BACK FEED FOR POWER RING AND SPECIAL REPAIR/REPLACEMENT OF HT CABLE AND CONNECTING ACCESSORIES OF HT POWER RING AT AF STN TEZPUR

SCHEDULE 'A' PART-I (B/R PORTION)

Carry out Site inspection and Survey to MAFI- PS-I and MAFI- PS-II including to and from and loading boarding of equipment required to carryout works of "back feed" system at AF Station Tezpur.

Development/installation/testing of PLC software for monitoring & control of 7 VCB's,(06 Nos at PS-I and 01 Nos at MRS) ACB's, 750 KVA DG (02 Nos) operations at PS-1 to have emergency power feed up to MAFI PS-2 automatically by use of control over existing switchgear for Normal & CATII modes of operation for specific direction of power feeds complete all as specified and directed by Engr-in-charge. Note: Programming software details, make and validity 1. PLC Programming software : CX-Programmer 2. Make : Omron 3. Version : Version 9.7 or Higher 4. License Validity : Life time Validity 5. HMI Programming software : NB Designer 6. Make : Omron 7. Version : Version 1.7 or Higher 8. License Validity : Life time Validity

Testing, decommissioning & re-commissioning of existing MAFI-1 PS transformer- 02 Nos,(630 KVA -01 Nos in MAFI PS-I & 200 KVA-01 Nos in MAFI PS-II) VCB’s 14 Nos 630 Amps (total 12 Nos at PS-I & II and 02 Nos at MRS), ACB’s 1000 Amps 4 pole of both substations including rearrangement (if required) in terms of position / place to suit updated power flow arrangement complete all as specified and directed by Engr-in-charge.

Development of scheme wirings / scheme diagrams/cable schedule for each station to suit integration program and preparation / conduct of scheme test protocolscomplete all as specified and directed. Note: Contractor should submit Schematic diagram for this project in hard copy as well as in soft copy to authorized officials and one copy will be displayed at the project site.

Health Check & Repair functions for transformer- 02 Nos,(630 KVA -01 Nos in MAFI PS-I & 200 KVA-01 Nos in MAFI PS-II) 11 KV VCB's 14 Nos (total 12 Nos at PS-I & II and 02 at MRS) , Interconnection Cabling tests and termination, 1000 Amps ACB's, bus coupler's including addition of remote control facility, U/V facility, Enhancement of aux contacts (if required) with extension of control wiring within equipment in complete to suit Original MAFI Concept complete all as specified and directed. Note : Health check should be as follow A. Inspection for abnormal temperature variation and cooling system of T/F. B. Check against transformer oil level/ temperature. Top up with dry oil, if necessary. C. Check T/F for any oil leakage from bushings, breathers etc. D. Check for any abnormal sound or excessive chattering. If any investigate and repair. E. Examine relays and alarm contacts and their operation, fuses etc. Check for relays functioning clean or replace the contacts. F. Earth resistance measurement of the (a) T/F body, neutral and other body parts. G. Oil test for dielectric strength, Dehydrate or replace the oil, if necessary. H. In case of fan & pump cooled T/F, Lubricate all bearings, check gear box. Examine Contacts, Check Manual control and interlocks. Replace burnt or worn out contacts or other parts. J. Insulation resistance comparison in 70 degree temperature with the initial values available at commissioning time. K. Check and arrest leakage/seepage of oil from main tank to OLTC tank L. Check for proper earthing of transformer body top cover with main body to reduce eddy current loss. M. After completion of the project the contractor shall have to arrange training to the officials/ persons/operators available at site without any extra cost to the depot. A certificate in this respect shall be provided against the said training to 08 personals of MES/User rep.

Excavating in Trenches not exc. 1.50 mtr wide and not exc. 1.50 mtr in depth, Taking Out and Laying of Cables, etc. and getting out in Soft/ Loose Soil, complete all as specified and as directed.

Returning, Filling in, including Spreading, Levelling, Watering and Well Ramming in Layers not exc. 250mm in Soft/Loose Soil, complete all as specified and as directed.

Removing excavated Materials (Soils) not exc. 50.00 mtr and depositing where directed at a level not exc. 1.50 mtr above the Starting Point in Soil, complete all as specified and as directed.

Horizontal Boring for passing GI protection pipe up to 100 mm bore (dia), under road / foot path, not exc. 10.00 metre in a single length, complete all as specified and as directed.

M&L Sand Cushioning (dry) in Trenches for protection of UG Cables (below, above and around the UG Cable laid in Trenches) of 230mm Spread thick -ness and consolidated (punned) upto 180mm thickness, complete all as specified and as directed. (NOTE : For the purpose of Payment, Punned thick-ness of Sand Cushioning only shall be Measured and Paid for).

Taking Down HT Under Gound cable of size 95 sqmm 3 core from trenches, complete all as specified and directed.

Supply laying & testing cable XLPE insulated screened PVC bedded, galvanized steel strip or wire armored, electric power cables (heavy duty)with stranded aluminum conductor, 11000 volts grade, of size 3 core 95 sq mm.

Re-Laying/Fixing or Passing through Pipe, XLPE insulated, Armoured, Electric Power UG Cable (Heavy Duty) with Aluminium Conductor, 11000 Volt Grade, Nominal Cross-Sectional Area 95 Sqmm 3 Core, complete all as specified and as directed.

S&F Sub-Class B brick, well burnt, laid breadth-wise along the axis of Cable laid in Trenches over Sand Cushion laid for UG Cable Protection, complete all as specified and as directed.

Re-laying only old Brick in Trenches for Under Ground Cable Protection (Serviceable Materials obtained from Item No. 1 here-in-before), complete all as directed.

M&L for cutting the road/hard standing and making good disturbed surface by using PCC type C2 (1:3:6) by using 20 graded stone aggregate for the fixing the pipe complete all as directed by the Engr-in-Charge at site.

Taking down/out unserviceable GI / HDPE/Polyethylene flexible pipes of any descriptions, laid in trenches and/or fixing with Walls/Poles complete all as specified and as directed.

S&F Galvanised Iron Pipe 80mm Bore (dia) ‘Light Grade’ for protection of UG Cable, laid in Floors/ Road Crossing, fixing to Pole with Mild Steel Clamps, Nuts, Bolts, etc., complete all as specified and as directed. Make : JINDAL/BANSAL/NTL.

Laying only tubes light grade 80mm bore in trenches.

Supply and fix cable jointing kit for 11 KV grade cable for indoor termination heat shrink type joint complete with jointing material and accessories suitable for3 core XLPE armoured Al conductor cable of size 95 sqmm

Supply and fix cable jointing kit for 11 KV grade cable for straight through heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE, armoured, Al conductor cable of size 95 sqmm, Indoor/Outdoor type, complete all as specified and directed.

Supply installation, commissioning and testing including providing all necessary electrical connection, HT Junction box CPRI approved, outdoor type (IP-54), factory made out of 3.15 mm thick MS sheet of size 1.25 m x 0.75 m x 0.75 m deep having hinge opening arrangement in front and back side and bottom frame made out of angle iron of size 50x50x6mm thick and 04 Nos legs 0.75 meter length with cable entry hole with cable gland & gasket at bottom including painting to all internal and external exposed steel surfaces with powder coating paint (5 stage process) with duly fixed in ground with necessary PCC foundation (1:2:4) type B1, with danger notice plate of 1.6mm thick mild steel sheet, vitereous enamelled (white), with letters, figures and conventional skull and bones in signal red colour, fixing lugs, bolts, screws etc complete all as directed by the Engr-in-Charge and comprising of the following accessoriescomplete including following accessories :- (a) Copper bus bar size 75mmx10mmx0.40 mtr long and 75mmx10mmx0.20 mtr long to be fixed on suitable capacity and size of insulaotrs ---03 Nos ( R Y B)

M&L for Earthing complete with GI earth plate electrode of size 600x600x6 mm thick buried directly in ground with earth pit not less than 2.25 meter deep below ground level with top edge of plate not less than 1.5 meter below normal ground level connected to GI earth strip of size 32 x 6 mm earth lead by means of nuts, bolts, check nuts, washers of galvanised iron as steel, protected by galvanized iron pipe 40mm bore (Medium grade) all as directed including cement concrete (1:3:6) type C-1 earth pit with precast RCC (1:1.5:3) type A-1 cover slab of size 42 x 42 x10cm thick reinforced with 8mm dia TMT bars @ 15 cm c/c both ways with 10mm dia mild steel round bar of 30 cm long, bent to shape as lifting handle, funnel, wire mesh, 20 mm bore galvanized iron pipe (medium grade) for watering, charcoal or coke and salt in alternate layers with necessary earth work in soft/loose soil complete all as shown in electrical plate No 3 of SSR Part I including testing on completion all complete as specified and directed after taking down old earthing.( GI strip upto 7.5m including testing consider in this item).

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