REPAIR AND MAINTENANCE TO HT DISTRIBUTION SYSTEM LT OVERHEAD LINES AND PERIODICAL SERVICE TO TRANSFORMER AND ITS CONNECTED ITEMS AT NPOL KOCHI

Amount

M & L for filtration of transformer oil of different capacity/Rating to remove moisture, sludge, carbon particles and to achieve the dielectric strength / rupturing capacity of oil not less than 50 KV/ minute with 2.5 mm gap and topping up of oil to the required level of transformer indicator level all as specified and directed by engineer-in-Charge. Note: Topping up of transformer oil shall be measured and paid separately (2) Contractor has to make his own arrangement for oil filtration plant.

M & L for topping up/ change oil for transformer of 11KV/433 Volt of different capacity / HT oil switch of 11 KV of different capacity of any rating of dielectric strength /rupturing capacity of oil not less than 50 KV ( tested at site with testing kit with 2.5 mm gap ) and test the dielectric strength of transformer oil before and after the topping up and make oil to the required level of transformer indicator level all as specified and directed. Note: The transformer oil container shall be ISI marked and brought at site in sealed container only. 2). The M & L for necessary T & P for collection of transformer oil samples, testing kit and filtration plant.

Supply and fix breather for transformer oil conservator tank including filled with silica gel for transformer of following ratings complete all as specified and as directed by engineer-in charge

100 to 250 KVA

315 to 500 KVA

S & F in replacement of Silica Gel (Moisture absorbent chemical ) for breather of transformer 11 KV /433 Volt of any make / rating complete all as specified and as directed by engineer-in charge

S & F in replacement of oil temperature indicator gauge suitble for transformer of capacity 11KV/433 Volt complete all as specified and as directed by engineer-in charge

M & L for drain cock ISI marked at the bottom of the main tank of transformer after , drain out oil up to safe working level and changing of existing HT bushing with stud, seal etc all as specified and as directed by Engineer-In -Charge.

Supply and fix in replacement of HT bushings of transformer 11 KV/ 433 Volts including by disconnecting existing HT connection, drain out oil up to safe working level and changing of existing HT bushing with stud , seal etc all as specified and as directed by Engineer-In -Charge.

Supply and fix in replacement of LT stud of suitable size for transformer of 11/0.433 Volt for following rating and make all as specified and directed by Engineer-In -Charge.

100 to 250 KVA

315 to 500 KVA

Material and labour for heat shrinkable HT, 11 KV , outdoor type, cable end joint suitable for 11 KV, 3 Phase, AC, 50 Hz, , XLPE Cable including jointing materials complete including taking down old end joints all as specified and as directed for following size.

50-95 Sqmm 3 core

120-185 Sqmm 3 core

Material and labour for heat shrinkable HT, 11 KV , indoor type, cable end joint suitable for 11 KV, 3 Phase, AC, 50 Hz, , XLPE Cable including jointing materials complete including taking down old end joints all as specified and as directed for following size.

120-185 Sqmm 3 core

Material and labour for Danger notice plate of size 25X20 cm of 1.6mm thick mild steel sheet, vitreous enameled white, with letters, figures and conventional skull and bones in signal red colour and fixed with M.S. clamps, bolts and nuts of approved size, for HT , complete all as specified and as directed by Engineer - in - Charge.

M& L for Earthing complete with galvanised steel earth plate electrode 60X60cmX6.0 mm thick, buried directly in ground (earth pit not less than 2.25 metres deep below ground level) with top edge of the plate not less than 1.5 metres below normal ground level, connected to galvanised earth lead 32x6 mm GI strip means of bolts, nuts, check nuts and washers of galvanised iron or steel all as shown in electrical plate No. 5 connected or indicated including testing on completion. Incl necessary excavation, earth work, PCC pit, RCC cover, funnel with watering pipe 20mm bore light grade,GI protection pipe 40 mm bore light gradecomplete all as specified and as directed by the Engineer - in - Charge. Note: No JCB excavation permitted inside the E/M installation

Supplying and fixing in repairs earth continuity conductor or main earthing lead of Galvanised iron strip of size 25 X 4 mm, fixed on pole from existing earth test point complete all as specified and as directed by the Engineer - in - Charge.

Supply and lay in trenches/fixed on wall GI tubing light grade with necessary fittings such as bend, tee, elbow etc complete for the following sizes

80 mm size.

50 mm size.

M&L for Dismantling the distribution Transformer 11/0.433 KV Oil Cooled copper wound of following capacity from installed position on existing platform after disconnecting electric supply from HV and LV sides on site for necessary repairs like replacement of washers, replacement of sleeves, taps, kerb tapes, cork sheet, refilling of oil, etc after checking and make fully functional the Winding Temparature Indicator (WTI) and Oil Temperature Indicator (OTI) including replacement of unserviceable item (if required) as directed and installing in its original position and making all electric connections with thimble & PG clamps, commissioning including refilling of transformer oil after dehydration with dielectric strength (min 60 KV) and testing complete all as specified and as directed.

Notes : (i) Labour component required for the replacement of unserviceable parts shall be deemed to be included in the unit rate quoted against this item. (ii) HT/LT bushes, breather assembly, Transformer oil shall be measured & paid separately under relevant item. (iii) T&P and minor parts will be arranged by the contractor and the cost thereof shall be deemed to be included in the unit rate quoted against this item.(iii) Filtration and topping up of transformer oil shall be measured and paid under respective items in shedule if necessary after checking the breakdown value of oil.

Lifting and laying HT UG cable of any size up to 120 Sqmm Note- Excavation/PCC and sand cushioning shall be measured & paid separately.

Supplying, laying and commissioning of HT XLPE cables, insulated, screened, PVC bedded, galvanized steel strip armoured, earthed, electric power cable with Aluminium conductor, 11 KV grade, 3 Core, 95 Sq.mm cross sectional area laid in trenches / fixed on poles including taking down old cables complete all as specified and as directed by the Engineer - in - Charge. Note: (i) Sand cushioning, cable protection, GI protection pipe, jointing kits and excavation & earth work shall be measured & paid for separately. (ii) Road cutting/floor cutting /cutting holes etc in walls required for laying/fixing of cable etc shall be made good as per existing. Nothing extra shall be admissible on this account. Quoted rates shall be inclusive of the above provisions.

All as per item No 18 but with 120 SQ mm 3 core

Excavation in trenches not exceeding 1.5 Mtr wide and not exceeding 1.5 Mtr in depth and getting out in soft / loose soil for Repairs/ laying cables etc complete all as specified and as directed by the Engineer - in - Charge.

Returning, filling in, including spreading, levelling, watering and well ramming in layers not exceeding 25cm thick complete all as specified and as directed by the Engineer - in - Charge.

Removal of excavated material [soil] to a distance not exceeding 50 m and depositing where directed at a level not exceeding 1.5m above the starting point complete all as specified and as directed by the Engineer - in - Charge.

M & L for quarry 'Riddled earth/sand' for cushioning for cable protection in trenches 8 cm before laying cable and 15 cm deep over the cable complete ( Note: Punned thickness shall be taken for measurement)

Supplying and laying unreinforced precast cement concrete cable covers, ISI Marked Class HV, Flat, Type - 1, of size 300 mm X 180 mm X 40mm in trenches for cable protection complete all as specified and as directed by the Engineer - in - Charge.

Lifting the existing precast cement concrete cable cover and laying the same covers, in trenches for cable protection, complete all as specified and as directed

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 120 Sq to 185 Sq mm all as specified and as directed by engineer in charge .

Dismantling GI earth wire or cradle guarding or GI anti climbing device etc. and serviceable materials keep in safe custody for reuse and unserviceable materials removing from the site complete all as specified and as directed.

Dismantling cross arms, MS channel or angle sections etc. complete and unserviceable removing from the site complete all as directed by Engr-in-Charge.

Dismantling HT/ LT stay assembly complete including MS clamps with bolts, nuts & washers etc along with necessary excavation and earth work, demolition of cement concrete and removing from the site necessary excavation & earth work complete all as specified and directed.

Dismantling of ACSR or AAC conductor squirrel type from poles of any size & capacity and unserviceable materials removing from the site complete all as specified and as directed.

Dismantling insulators or shackle of LT of any type and size from poles and unserviceable insulators removed from the site complete all as specified and as directed.

M&L for stay assembly complete with accessories such as mild steel glavanised flat iron stay clamp, 7/3.15 mild steel galvanised stay strand/wire, one loo[p type porcelain vitreous insulator (white , brown or green) overall dimentions 65X90 mm & clearing hole 16 mm, stay grips, mild steel galvinsed stay bow, thimbles, 16 mm dia diameter of stay rod shown in electrical plate No 1 of MES SSR Part- I complete all as specified and as directed. (Note : Excavation & earthwork, cement concrete measured and paid separately relevant items of this schedule).

M & L cross arms, bracings, support clamps and back plates fabricated from structural steel section including nut bolts washer, welding, bending cold or hot drilling holes for bolts in any shape or size as indicated or directed including two coats of aluminium paint over a coat of read oxide zinc chrome primer including preparation of surfaces complete all as specified and as directed.

S & F pin type insulator porcelain vitreous, white, brown or green including one galvanised mild steels spindle two galvanised iron washers and one galvanised iron nut 100 mm height 65 mm dia for 1100 volt grade all as specified and directed.

S & F shackle type porcelain, vitreous white brown or green insulator including GI/MS straps of size 31x3mm, 12mm dia insulator bolts nuts and washer for working pressure 1100 volts of size 75mm height 90mm dia complete all as specified and as directed.

M & L for ACSR conductor squirrel type any size as approved on HT/ LT Poles including stringing, binding to insulators with aluminium binding wire with connectors, etc providing PVC sleeves for jumpers as in OH conductors complete all as directed.

M & L galvanised steel continuous wire 4mm dia complete all as specified and as directed.

Re-Stretching, tightening and fixing the ACSR conductor of any size on LT poles including necessary aluminium binding wire connectors/spacer etc, without taking down the conductors complete all as specified and as directed.

M & L in replacement of PVC Zig Zag LT Line spacer/separator for LT over head ACSR conductor of any size without taking down the conductors complete all as specified and as directed.

Dismantling of Unserviceable Pre-stressed concrete poles/ steel poles of any size & shape including necessary excavation and earth work, taking out of embedded portion of poles from concrete after necessary demolition of cement concrete foundation and disposal of same complete all as specified and directed. Note : Excavation & earthwork, returning filling removing of surplus soil and demolition of concrete and disposed of the demolished concrete shall deemed to be included in the unit rate quoted by the tenderer.

Supply, erecting & fixing steel tubular swaggered poles complete with cast iron base plate, final taper plug, bolts, nuts & screws as specified type 410 SP - 31 ( 9.00 metres long), complete all as specified and directed. Note: (i) Earthwork, cement concrete, etc. will be measured and paid separately under relevant items of this schedule . (ii) Excavation & earth work shall only be measured in case location is other than item No. 40

M & L for HT danger notice board readymade / printed on water proof sheet with White letters blue radium background , MES logo , conventional skull and bones in signal red colour and supporting channels of Approved size up to 1.5 X 1 m all as directed by Engineer - in - Charge. Note:-excavation and concrete work paid separately .

M&L for PCC 1:4:8 Type D2 40 mm graded aggregate Complete for foundations for post top lantern /PCC/Tubular at road crossing etc , complete all as directed by Engineer-in-Charge.

M&L for PCC 1:3:6 Type C1 20 mm graded aggregate in coping of pole for post top lantern complete all as directed by Engineer-in-Charge.

M & L for preparation of old painted rusted LT cross arms ,bracings ,supports, clamps ad back plate fabricated from structural steel sections including nuts bolts washers etc and Steel poles providing two coat of aluminum paint including numbering and making strips in circular shape of diameter 150mm black colour letter of height 50mm complete as directed by Engr - in-charge not exceeding 150 mm up to 1.5 mtr above ground level with alternative layer of yellow and black paint complete all as specified and as directed.

M & L for cutting the tree branches at a distance not exceeding 2.0 Mtrs way from LT distribution lines , of tree branch size up to 50 mm dia as directed and deposited the removing branches at a distance not exceeding 50 Mtrs from Road /Path. Note: Each pole locations / Distance between Two poles of Distance maximum up to 30 Mtrs is considered as One job irrespective of number of tree branches for cutting tree branches for over head lines .

Dismantling and Rewinding of the distribution Transformer 11/0.433 KV Oil Cooled copper wound of 400 KVA capacity from installed position on existing platform after disconnecting electric supply from HV and LV sides on site and take it to the workshop Preliminary Inspection, Diagnosing the fault. Service charge for oil draining, transformer top cover removing, bush stem dismantling, removing of core coil assembly, job cleaning, dismantling of CCA, coil winding, re fixing of CCA, Terminal Gear Cutting & Rejoining charges, Tanking, and all other jobs & filtering pairs like replacement of washers, replacement of sleeves, taps, kerb tapes, cork sheet, refilling of oil, etc after checking and make fully functional the Winding Temparature Indicator (WTI) and Oil Temparature Indicator (OTI) including replacement of unserviceable item (if required) as directed and installing in its original position and making all electric connections with thimble & PG clamps, commissioning including refilling of transformer oil after dehydration with dielectric strength (min 60 KV) and testing

M& L for removing of dirt by using sand paper completely and preparation of old painted steel surface of Transformer and any gauge/size with applying two coats of primer with red oxide Zinc chrome and a final coat of Japan paint as existing colour of paint by spray paint (Using Machine) at four sides, top and bottom of transformer capacity of following rating in KVA all as specified and as directed by Engineer in charge. Note: (i) Contactor has to take the shutdown of Transformer 11/0.433 KV from substation/MRS before starting the execution of work and switch ON/OFF on the Transformer after completion of work all as directed. Note: (ii) Cost of T & P also included in quoted rate. (iii) The contractor should be deployed the skilled electrician for handling the HT & LT installation smoothly without damaging/disturbing the existing installations.

Transformer capacity upto 400 KVA

Transformer capacity upto 1000 KVA

Transformer capacity upto1600 KVA

Meterial and Labour for laying 40 mm aggregate in substation yard to protect from touch potential Hard core, broken to gauge n exc 63 mm

N.O. Antony Contractors (BID ID -3169879)

WELTRONENGINEERINGSERVICES (BID ID -3165234)