MAINTENANCE AND REPAIR TO TRANSFORMERS AND CONNECTED HT WORKS AT COIMBATORE AND MADUKKARAI ARMY AREA UNDER GE WELLINGTON

Amount

Excavating in trenches, n exec 1.5 m wide and n exec 1.5 m in depth; for foundation of poles or laying of cable trench n exec 10 sq m on plan and n exec 1.5 m in depth and getting out in hard dense soil complete all as specified and as directed.

Returning and filling including spreading, levelling, watering and well remming in layers n.exc 25 cm complete all as specified and as directed.

Removing excavated material to a distance not exceeding 50 meter and depositing where directed at a level not exceeding 1.50 meter above the starting point complete all as specified and as directed.

M&L for 40mm bore GI tubing, light grade, ISI marked conforming to IS 1239 for protection of cable fixed in wall or laid in trenches complete all as specified and as directed.

M&L for 80mm bore GI tubing, light grade, ISI marked conforming to IS 1239 for protection of cable fixed in wall or laid in trenches complete all as specified and as directed.

M&L for sand cushioning to PVC cable using riddled clean dry sand or river sand free from stone and other impurities, gently punned below/ around cable including watering and consolidation complete all as specified and directed. Note: Punned thickness only will be measured and paid.

Supply and laying burnt clay bricks, sub class "B", old size, laid dry in trenches for cable protection complete all as specified and as directed.

Supply & Laying XLPE insulated, screened, PVC Bedded, galvanized steel strip of wire armoured, electric power cable heavy duty with aluminium conductor 1100 volts grade cross sectional area 240 Sqmm 3.5 core laid in trenches / ducts/ fixed to wall/ pole/ inside panel/ drawn through pipe including cable glands and terminal sockets and taking down old unserviceable UG Cables etc complete all as specified and as directed.

All as per item No 8 here in before but size of cable 120 Sq.mm 3.5 core complete all as specified and as directed.

All as per item No 8 here in before but size of cable 50 Sq.mm 3.5 core complete all as specified and as directed.

All as per item No 8 here in before but size of cable 35 Sq.mm 3.5 core complete all as specified and as directed.

All as per item No 8 here in before but size of cable 25 Sq.mm 3.5 core complete all as specified and as directed.

Supply and fix straight through cable jointing kit for 1100 Volts grade cable complete with jointing material heat shrinkable and accessories suitable for 3.5/ 4 core XLPE/ PVC insulated armoured Aluminium conductor cable of size 70 Sqmm to 120 sqmm complete all as specified and as directed.

Supply and fix straight through cable jointing kit for 1100 Volts grade cable complete with jointing material heat shrinkable and accessories suitable for 3.5/ 4 core XLPE/ PVC insulated armoured Aluminium conductor cable of size 150 Sqmm to 240 sqmm complete all as specified and as directed.

Supply, fix and connect including testing of change over switch capacity 63 amps AC 415 volt 4 pole side / front handle operated in sheet steel enclosure complete all as specified and as directed. Note: Minor addition alteration in panel for fixing of change over switch are deemed to be included in the quoted rates, nothing extra shall be paid on this account.

Material and labour for Cutting of existing bituminous surface road including returning filling and making good with material and labour for PCC (1:3:6) type C1 using 20mm graded stone aggregrate to match with the existing surfaces complete all as specified and as directed.

M&L for replacement of old Silica gel with new Silica gel from the breather unit of transformer of capacity upto 250 KVA complete all as specified and directed.

Material and labour for earthing complete with GI earth plate electrode of size 600mm x 600mm x 6mm thick buired directly in ground vertically at a depth not less 2.25 meter below normal ground level with top edge of earth plate at a depth not less than 1.5 meter below normal ground level surrounded from all sides by 1.5cm thick packed layer of charcoal dust and common salt filling in alternate layers and making electrode connection by using GI strip of size 32 X 6 mm by means of bolts nuts check nuts and washers made of brass and earth strip protected by light grade 40mm dia GI Pipe upto test point and connected to main switch board or main control board as shown in Electrical Plate No. 5 of SSR Part - I with provision of GI pipe medium grade 20mm bore for watering including funnel wire mesh, RCC 1:2:4 pit cover slab with 6mm dia MS bars and PCC chamber pit with 1:2:4 type B1 (including excavation and earth work in any type of soil) complete all as specified and as directed.

Supply and spread stone aggregate of gauge 40mm to 80mm graded for outdoor substation complete all specified and directed.

Supply, fixing and connecting HT outdoor non linear type lightning arrestors station class with mounting accessories complete fixed on cross arms of existing 2 / 4 pole structure and connected with same size of ACSR conductor as O/H HT conductor, with 11 KV H.T. empire tape insulation with all fitting, transmission class having discharge capacity of 65 kilo amps and suitable for working pressure of H.T. 11 KV complete all as specified and directed.

Supply, fixing and connecting HT outdoor non linear type lightning arrestors station class with mounting accessories complete fixed on cross arms of existing 2 / 4 pole structure and connected with same size of ACSR conductor as O/H HT conductor, with 22 KV HT empire tape insulation with all fitting, transmission class, having discharge capacity of 65 kilo amps and suitable for working pressure of HT 22 KV complete all as specified and as directed.

Supply and fix drop out (DO) fuse unit, expulsion type, outdoor type, 200 amps rating, single pole mounted on two insulators fixed to and including MS channel with nuts,bolts,washers etc. Synthetic bounded fuse carrying tube complete with HT fuse element up to 200 amp capacity for HT 11KV working pressure complete all as specified and as directed.

Supply and fix drop out (DO) fuse unit, expulsion type, outdoor type, 200 amps rating, single pole mounted on two insulators fixed to and including MS channel with nuts,bolts,washes etc. Synthetic bounded fuse carrying tube complete with HT fuse element up to 200 capacity for HT 22 KV working pressure complete all as specified and as directed.

Dismantling air break gang operated switches vertical/ horizontal mounted including insulators and operating mechanism for replacement of broken/ worn out components and insulators etc complete all as specified and directed.

S&F Triple pole, mechanically gang operated switch mounted on insulator and steel frame, with operating mechanism worked from ground level, for current rating upto 630 amps and operating voltage 22000 Volts complete all as specified and directed.

S&F Triple pole, mechanically gang operated switch mounted on insulator and steel frame, with operating mechanism worked from ground level, for current rating upto 400 amps and operating voltage 11000 Volts complete all as specified and directed.

Site clearance by cutting of shrubs, cutting of grass, bush weed, trees, sapling not exceeding in 30 CM girth and removal of grass with roots and leveling area and removal of the same outside not more than 50m complete all as specified and as directed.

M&L dehydration of transformer oil with mobile stream line transformer oil filtration plant at site with all accessories connected to transformer and carrying out filtration of oil to desired dielectric strength i.e. not less than 40 KV at 2.5 mm gap complete all as specified and as directed. NOTE-Test certificates shall be submitted before and after filtration for dielectric strength in the proper format

M&L for replacement of transformer oil conforming to IS 335/ 1983 (latest amendment if any) for topping up/ by dehydrating through stream line filter complete all as specified and as directed.

M & L for welding, grinding, repair of locking arrangement and hinges of LT Panels, APFC Panels and Switch board of size upto 1200 mm X 600 mm, complete all as specified and directed.

M&L for preparation /cleaning of old painted steel surfaces of Transformer of any capacity and carrying out painting with One coats of synthetic enamel first quality paint and writing SM/ MES No 5 cm height with white synthetic enamel paint complete all as specified and as directed.

shalom constructions

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