REPAIRS/REPLACEMENT OF HT CABLES, VCB/OCB/LBS, OH LINE, TWO/FOUR POLE STRUCTURE, BATTERY BANK, LIGHTENING ARRESTERS AND RELAYS, AND OTHER ALLIED WORKS AT AFS TAMBARAM

Amount

Excavation in trenches not exceeding 1.5 mtr wide and not exceeding 1.5 mtr depth and getting out in hard/dense soil all as directed.

All as per item No 1.00 above but exc 1.50m to n exc 3.0m depth all as directed.

Returning filling in including spreading levelling watering & well ramming in layers not exceeding 25cm thick in hard/dense soil

Removing excavated material not exceeding 50 mtr distance and depositing where directed at a level not exceeding 1.5 mtr above the starting point.

Supply and spread dry river sand in trenches for cable cushioning on top and bottom of the UG cable and surface of 2 pole and 4 pole structure etc. all as specified. Note . Punned thick ness shall be measured.

Supplying and laying un-reinforced precast concrete cable cover class HV, type 1, flat size 300x180x40mm for cable protection all as specified and directed.

Labour only for laying of un-reinforced precast concrete cable cover class HV, type 1, flat size 300x180x40mm taken out from existing cable trench for cable protection all as specified and directed.

Labour only for taking up or down of old unserviceable HT underground cable of size 70 to 120 sqmm 3 core including making good the existing surface all as specified and directed.

Supply, laying and testing and commissioning XLPE insulated screened PVC bedded, galvanised steel strip electric power cables (heavy duty) armourmed cable 11000 volts grade with aluminium conductor of size 3 core 120 sqmm all as specified and directed. NOTE : - Earth work and excavation shall be measured and paid separately.

Taking out serviceable 11 KV HT UG cable from trenches and relaying the same in same or other location where directed for the size of 70 to 120 sqmm HT 11 KV grade 3 core for find out the defect/fault or diversion of the same complete all as specified and as directed. Note: [i] Earth work, excavation sand cushioning, bricks for protection, GI pipe etc shall be measured separately under relevant items of this schedule. [ii] The rate quoted shall deemed to include shifting of the cable from one location to other location. [iii] Necessary joints shall be measured under relevant items of this schedule.

Supply and laying 80mm bore GI tubing 'light grade' with all fittings for cable protection fixed on poles/walls/laid under road crossing or floor including making good the disturbed surfaces/area including taking down of old unserviceable complete all as directed.

All as per item No 11.00 but 100 mm bore all as specified.

M&L for Cement concrete 1:3:6 type C2 (using 40mm graded stone aggregate) in cutting area of the bituminous road for any description to a size not exceeding 0.45x0.45m for crossing of cable and making good the surface even and rough all as specified. (Cutting of road surface will be measured under item No 62)

M&L Mild steel section for Cross arms, fencing post/bracing, supports, clamps and back plates etc fabricated including nuts bolts, washers, welding bending cold or hot drilling holes in any shape or size as indicated or directed incl dismantling/taking down of old U/S complete all as specified and directed.

M&L for cable jointing kit of 11 KV (Earthed) grade cable for indoor termination cold shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminum conductor cable of size 120 sqmm to 185 sqmm in repairs all as specified and as directed.

M&L for cable jointing kit of 11 KV (Earthed) grade cable for out door termination cold shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminum conductor cable of size 120 sqmm to 185 sqmm in repairs all as specified and as directed.

All as per item No 16 but for HT Cable size 50 sqmm to 95 sqmm 3 core complete all as specified and directed.

M&L for cable jointing kits for 11 KV (Earthed) grade for straight through cold shrink type joint complete with jointing material and accessories suitable for 120 to 185 sqmm 3 core XLPE cable armoured aluminum conductor complete all as specified including taking out the damaged portion.

All as per item No 18 but suitable to HT Cable size 50 sqmm to 95 sqmm 3 core complete all as specified and directed.

Supply and install test and commissioning of gang operated air break switch, vertical type triple pole, mounted on 3 insulator mechanically operated mounted on insulator and steel frame with operating mechanism worked from ground level for current rating upto 200 Amps for 11000 volts grade including connecting up locking arrangement including taking down the old unserviceable switch complete all as specified and directed.

S&F connect in replacement of defective lightening arrestors distribution class MCOV 9 KV and discharge capacity 65 KA peak non linear resistance type with all fittings suitable for 11 KV electric working pressure including strap bolts and nuts and washers etc. all directed by Engr-in-charge.

Supply and install drop out fuse unit assembly single pole expulsion type suitable for HT 11 KV rated 100 amps including nut, bolts and washers with barrel fuse unit mounting on channel including taking down the old unserviceable assembly and making good the existing surfaces complete all as specified.

Supply and fix pin type porcelain, vitreous, white/brown/green insulator including one Galvanized mild steel spindle two galvanized iron washers and one galvanized iron nut for 150mm height, 150mm dia suitable for 11000 volts grade complete including taking down old unserviceable insulator all as specified and as directed.

Supply and fix disc type insulator porcelain vitreous white, brown or green single disc assembly 145mm height and 255mm dia ball and socket type single dia assembly for tension with tension clamps for conductors and hard ware for working pressure 11000 volts complete including taking down the old unserviceable insulator all as specified and directed.

M&L for removing old/ burned out jumper connection in binding with HT/ LT lines from position including re-binding the same with new binding wire of suitable size aluminium wire all directed by Engineer-in-charge.

M&L for ACSR conductor of any size for LT/HT over head line wire and making jumper (upto 2 Mtr length) connections including disconnection and taking down of old unserviceable conductor complete all as specified and as directed.

Supply and fix galvanised steel wire 3.15 or 4mm dia as in earth continuity conductors/ guarding cradles for LT OH line including taking out old unserviceable wire complete all as specified and directed.

Supply and fixing stay assembly complete with accessories as shown in electrical plate No. 1(loop type insulator ,stay clamp,excavation and concrete measured saperetly of size 16mm dia) incl taking down old U/S stay assembly complete all as specified and directed.

Supply and fix galvanised stay strand 7/3.15mm including taking down the unserviceable stay wire from stay assembly and made good the disturbed places complete all as directed.

Supply and fix loop type insulator, vitreous porcelain, white, brown, green small size with overall dimensions 65 x 90mm, clearance of hole 16mm including taking out old and unserviceable insulator all as specified and as directed.

Surface dressing not exceeding 15cm deep in hard/dense soil including separating and picking and stacking stone aggregate aside for reuse including spreading out the taking out materials such as aggregate and sand etc.in the installation yard of transformer/two/ four pole structure all as directed at site.

Supply and spread, depositing in layers, watered, rammed to true surface 20-40mm graded stone aggregate for installation yard all as directed

Servicing of two pole structure complete including replacement of unserviceable jumpers, sleeves, vice type connectors, bolts nuts washers connecting lugs/thimbles greasing the moving parts applying petroleum jelly on moving and fixed contacts, tightening all connection including making alignment of gang operated device and other all mechanism in the structure and cleaning of all insulators complete all as directed at site by Engr-in-Charge Note :- (i) The spares like insulators, Lightening arresters, GOD, GOD moving and fixed assembly, danger notice board etc shall be measured and paid under relevant items of this schedule. (ii) No extra payment will be made for the spares required to keep the installation in satisfactory functioning through out the contract period other than given in the schedule.

All as per serial item No 33.00 above but for four pole structure.

Supply only fixed contact knife for vertical/Horizontal operation (male) type all as specified and directed.

Supply only fixed contact knife for vertical/Horizontal operation (female) type all as specified and directed.

M&L for steel tubular swaged poles 11 mtr overall length, type 410 SP-55 with cast iron base plate welded to the bottom of the poles finial taper plug nuts bolts and washers etc. including two coats of bituminous paint internally and externally for the portion bedded in concrete and two coats of aluminium paint over a coat of red oxide primer to external surfaces incl taking out of old unserviceable pole complete all as directed and specified.

M&L for Plain cement concrete 1:4:8 type D2 using 40mm graded stone aggregate for foundation of poles/stays all as specified.

M&L for Plain cement concrete 1:3:6 type C1 using 20mm graded stone aggregate for coping of poles incl necessary formwork all as specified

M&L for painting of LT/HT pole including cross arms connected items with one coat of aluminium paint after preparing the existing surfaces of the poles and applying one coat alternatively yellow and black synthetic paint 30cm of each colour upto 1.50m height from bottom of pole above the ground level and marking of pole numbers with black paint all as specified and directed.

All as per item No 40 above but 2 Pole structure including all channels, cross arm and connected items complete all as specified and directed.

All as per item No 40 above but 4 Pole structure including all channels, cross arm and connected items complete all as specified and directed.

Cutting, trimming and pruning of trees/ tree branches of any girth upto 2m all around existing LT/ HT over head lines including cleaning the disturbed area beneath the LT/ HT overhead lines and removing the tree/ tree branches and debris from at site and depositing where directed at site. Note: (i) The rate quoted shall be deemed to include the work for the entire currency of the contract. (ii) Approximate span between poles is 30 to 60m.

M&L for spray painting to Indoor/Out Door Transformers of capacity from 100 to 500 KVA any make & type with two coats of synthetic enamel paint of approved colour as specified over a coat of red oxide primer including necessary prepration of surface with wire brush emery paper for removing of dusts,oil/grease spots, water sweating spots etc all as specifide and directed. (Note: The above work includes writing SM/MES Nos (block , Roman, Indian) with thick synthetic enamel paint of approved shade in exc 5 cm height all as directed by the Engineer-in-Charge)

Disconnecting carefully the transformer of capacity 100 to 500 KVA from HT and LT connections and taking out the transformer from its position and transporting/shifted it to out side work shop (if required), and transporting the same back to the site after completing the all necessary repair works, refixing/connection, testing and commissioning of transformer at site on full load all as directed by Engr-in-Charge.

Labour only for strip opening, lifting of core, re building transformer the for pre testing to find out the defects, rebuilding with new copper binding wire of same/ existing size/gauge stripping off the transformer, including removing the Core and Winding from the internal tapping connection, de-brazing all the tapping and star points completely, disconnecting the tap switch for lifting the core and winding from the Transformer Body and separating the High Voltage and Low Voltage coils, if found any leak to be make good, reconnecting with necessary brazing all the tapping and internal connections as before after assembling the coil including replacement and re-arranging the Tap Switch Connecting leads, completely Silver brazing all the tap Switch contact & fixing the same with new oil seal, and using necessary insulating materials such as fiber paper nice sheets Leatheroid insulation sleeves, craft paper etc., for High Tension limb and low Tension coils and assembling all parts and assembly including improving the IR Value of Core and Windings through Hot Air Oven, cleaning tank, tubes, radiator, conservator tank (inside), building of new core, reassembling, No load loss measure & LV Coil and HV Coil assembling, star& delta connection, Cleaning, scratching of the outside & inside of the tank, two coats of Painting, replacement of breather, Replacement of Transformer oil, improvement of IR value and conduction preliminary and final test repaired transformer complete all as specified and directed. (Note: Cost for "supply only" of the materials & replacement of HV&LV windings shall be measured and paid separately against item Nos 47 to 53 of this schedule)

Supply only of insulating material ( Double Paper cover insulation) all as directed

Supply only Breather assembly for transformer upto 400 KVA Capacities duly fitted with silica gel complete all as specified.

Supply only of Low voltage Brass stud suitable to existing size for transformer terminal with brass nut, and washers 8 Nos. including rubber seat complete all as specified.

Supply only of High Voltage Brass stud suitable to existing size for transformer terminal with brass nut , and washers 8 Nos. including rubber seat complete all as specified.

Supply only gaskets set with Cork/Neoprene sheet 6mm thick, nuts bolts, washers including all other sundry materials required for repair.

Supply only of paint of approved colour/make for internal surfaces of transformer tank complete all as specified and directed.

Supply only of paint approved colour/make for external surfaces of transformer tank including all connnected parts/items complete all as specified and directed.

Replacement/Rewinding the HV/LV limb with super enamelled copper wire of appropriate size as required to match with existing wire to have the same impedance complete all as specified and directed.

M&L for Refilling of Silicagel in breather of transformer various capacities including taking out of unserviceable Silicagel complete all as directed.

Supply, Toping up / replacement of transformer oil with dielectric strength not Less than 50 KV all as specified and directed. (Note;- Test Certificate of transformer oil as issued by the manufacturer shall be produced by the Contractor).

Shifting of trolley mounted transformer upto 400 KVA from one Substn to other distance not more than 5 Kms carefully with tractor / Crane incl all Towing arrangement and taking out HT/ LT connections of defective transformer and connecting carefully HT/ LT connection at new site incl temporary earthing connection complete all as specified.

Servicing of indoor HT 11KV VCB any make/type over current and earth fault relay secondary injection test any make VCB general service like cleaning, lubrication, Electrical/Mechanical operation check, Draw in/Draw out check, IR value check contact resistance test CT ratio and breaker tripping through relay by primary injection test, replacement of deterioted copper wiring kit with suitable copper conductor complete all as specified and directed Engr-in-charge.

Servicing to battery charging unit of HT VCB panel cubical type, dust and vermin proof floor mounted type 230 volts input and out put of 24 to 36 volts at a maximum current of 10 Amps for charging a battery bank of 24 volts 100 AH including replacing of internal wiring with suitable size of copper conductor and including replacing the following items :- (i) Supply and fixing sealed maintenance free battery of 12 volts/100AH 02 No's with connections fixed inside the charging unit - 01 Set (ii) MCB control for input circuit, DC out put circuit and battery path - 01 set (iii) Blocking diode in DC out put circuit to prevent reverse drainage of battery in charger - 01 Set.

M/L for earthing complete with galvanized steel earth plate electrode 600X600X6mm thick buried directly in ground (earth pit not less than 2.25m deep below normal ground level) with top edge of the plate not less than 1.5M below normal ground level connected to GI earth lead wire 4.0 mm dia by means of nuts, bolts, check nuts and washer of GI steel and connecting to testing point including provision of test point and all as shown in electrical plate No. 3 of SSR Pt I (2009). The quoted rate is inclusive of necessary earth work and PCC chamber in type CI (1:2:4) with 8 mm CTD bar reinforcement both ways at 140 mm centre to centre complete all as directed by Engr-in-Charge. Note :- The rate is deemed to be inclusive of the cost of earth work, excavation on any type soil and removal of surplus soil to a distance of 50 Mtrs, PCC 1:2:4 type B1 for earth pit cover 6 Nos 6 mm dia CTD bar on both direction, earth lead protection GI pipe medium grade with suitable size from earth plate electrode to main switch, GI Wire length up to 7.50M will be measured as one unit) including taking down of old unserviceable earthing.

M/L for earthing complete with galvanized steel earth plate electrode 600X600X6mm thick buried directly in ground (earth pit not less than 2.25m deep below normal ground level) with top edge of the plate not less than 1.5M below normal ground level connected to GI earth strip of size 32x6mm thick by means of nuts, bolts, check nuts and washer of GI steel and connecting to testing point including provision of test point and all as shown in electrical plate No. 3 of SSR Pt I (2009). The quoted rate is inclusive of necessary earth work and PCC chamber in type CI (1:2:4) with 8 mm CTD bar reinforcement both ways at 140 mm centre to centre complete all as directed by Engr-in-Charge. Note :- The rate is deemed to be inclusive of the cost of earth work, excavation on any type soil and removal of surplus soil to a distance of 50 Mtrs, PCC 1:2:4 type B1 for earth pit cover 6 Nos 6 mm dia CTD bar on both direction, earth lead protection GI pipe medium grade with suitable size from earth plate electrode to main switch, GI strip length up to 7.50M will be measured as one unit) including taking down of old unserviceable earthing.

Cutting of roads/ hard surface/ cement surface for laying of GI Pipe lines for protection of HT Under ground cable of size not exceeding 45 cm width and 1.0 mtr depth all as specified and directed.

OM Muruga Enterprises