MAINTENANCE AND REPAIR TO HT SYSTEM AND CONNECTED ITEMS AT AFAC COIMBATORE

Amount

Surface dressing not exceeding 15 cm deep in hard / dense soil including separating and pick and staking 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, complete all as specified & directed.

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

Returning and refilling of excavated soil upto a depth of 30 cm after riddling the excavated soil for laying underground cables and post holes all as specified and as directed.

Surface dressing not exceeding 15 cm deep in soft / loose soil for removing weeds and wild grass inside the installations and unwanted plants using petrol operated Tree/Grass cutting tools and using chemical spray and trimming trees and dressing of the surface by scrapping high patches and filling low patches with the scrapping soil to give an even and neat look to the site and disposing off all the unwanted grass, bushes and debris around two / four pole / MRS & Transformer etc, complete all as specified and directed. (Note :- Cleaning area of installation 2(two) times in a period of six months shall be measured as "PER SQM" unit.)

Removing excavated material not exceeding 50 mtr distance and depositing where directed at a level not exceeding 1.5 mtr above the starting point, complete all as specified & directed.

Material and labour for broken stone / boulders, hardcore of guage exceeding 63 mm but not exceeding 100 mm, deposited, spread and levelled in layers not exceeding 15 cm thick, to a true surface filling in four pole / two pole structure transformer area, complete all as specified & directed.

Earth cushioning to UG cables using excavated soil riddled by using large sieve to separate the composite particles / roots etc and refilling in trenches, all as specified and as directed. Note : Punned thickness will be measured for payment.

Material and labour for PCC (1:3:6) type C-2 (using 40 mm graded crushed stone aggregate) in foundations, filling and mass concrete, complete all as specified and directed.

Material and labour for PCC (1:2:4) type B-2 (using 40 mm graded crushed stone aggregate) in foundations, filling and mass concrete, complete all as specified and directed.

Material and labour for painting of steel / iron surfaces of any description over 10 cm in width or girth with cleaning, preparation of old painted surfaces and applying two coat of aluminium paint, all as specified and as directed.

Supply and laying 80 mm bore Galvanised Iron 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.

Supply and laying 100 mm bore Galvanised Iron 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.

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 185 sqmm laid in trenche, fixed to wall / drawn through pipe and including the distrubence surface of road making good with using PCC 1;3;6 type C2 (using 40mm graded stone aggregate), fixing the cable with suitable size glands, crimping type lugs etc, all as specified and directed. NOTE : Earth work and excavation shall be measured and paid separately.

Material and labour 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.

Material and labour 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.

Material and labour 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 & directed .

Disconnecting the electric supply from the existing HT Panel / VCB / RMU / Transformer / HT poles and meggering the HT under ground cable any type & size for its IR value and ensuring the servicebility by HT megger, locating the faults by cable fault locating insturment suitable to locate and pin point faults in HT cables for any distance and reconnect the HT cable including jointing the cable at fault location with straight through cable jointing kit heat shrinkable type for 11000 volts grade cable with jointing material and accessories, cutting the bitumin road, Excavation in trenches nexc, 1.5m wide and not exc 1.5m deep and getting out complete in hard/dense soil for taking out and making good of disturbed surfaces as per existing finish, all as specified and as directed. Note : Cable Joint kit will be measured and paid seperately.

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

Material and labour for dehydration and filtration of transformer oil through on load mobile stream liner transformer oil filtration plant at various site and various capacity installed at pole,floor,plinth mounted with all accesssories connected to transformer to carrying out filtration of oil for desired dielectric strength all as per IS-335 i.e not less than 60 KVA at 2.5 mm gap including testing after filtration and recording before and after testing results and including rectification of oil leakage HV/LV bushing side of transformer complete all as specified and directed. NOTE : (i) Transformer oil for filling/topingup shall be measured and paid saparately (ii) Oil level at the conservator tank should be in maximum limit. (iii) After filtration process, the test report to be submitted to the Engr-In-Charge

Material and labour 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 of transformer, complete 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 5 cm height all as directed by the EIC)

Preventive maintenance of transformer indoor / outdoor type 11 KV / 440 volts removing HT LT cable connection from transformer and taking into the workshop with the help of man power, crane, truck, TPT etc opening the top cover lifting the core removing sludge with oil pressure pump and put into the oven for 49 hrs after completion of heating, applying two coats of varnish again put in the oven for 24 hrs and cleaning the tank sludge etc., including followings :- (a) Before putting into the tank pressure test to be done for tank. (b) After completion of the job, transformer tests to be carried out that is no load test short circuit test and oil colour test to be done at factory. (c) Test to be carried out in the presence of Engineer -in-chage. (d) Two coats of synthetic enemal painting to be carried out. (e) Any damages of bushes and studs to be replaced. (f) Shifting the transformer from wksp to sub station etc all as specified and directed. Note :- (i) Spare parts measured and paid separtely. (ii) Standby transformer suitable KVA should be provided by contractor at the site for unintrupted supply

Material and labour for draining out of oil upto bottom level of transformer and opening of HV and LV bushings of transformer capacity 11KV/433 Volt capacity upto 500 KVA step down transformer of any make for replacing the all mounting gaskets of the transformer body and conservator to arrest the oil leakage and replacement of gasket HT / LT terminal bushing gasket / bushing and rectifying oil leakage and making all connections complete all as specified and directed.

Supply and fix in repair old unserviceable 11 KV HT terminal porcelain bushing suitable upto 500 KVA transformer including suitable brass stud with brass nut, and washers 6 Nos. including rubber seat as per site requirement, complete all as specified and directed.

Supply and fix in repair old unserviceable 11 KV/433 LT terminal porcelain bushing suitable upto 500 KVA transformer including suitable brass stud with brass nut, and washers 8 Nos. including rubber seat as per site requirement, complete all as specified and directed.

Supply and fix in repair gaskets set with Cork / Neoprene sheet 6mm thick, nuts bolts, washers including all other sundry materials required for repair, complete all as specified and directed.

Supply and fixing in repair Breather assembly for transformer upto 500 KVA Capacities duly fitted with silica gel, complete all as specified and directed.

Material and labour in replacement for Refilling of Silicagel in breather of transformer various capacities including taking out of unserviceable Silica gel, complete all as specified and directed.

Supply and fill new transformer oil conforming to IS-335/1983 for topping up / replacement by stream line filter, complete all as specified and directed. (Make : Power Oil / HP / BP / Electrol)

Servicing to indoor HT 11KV SF6 circuit breaker (01 Incomer & 04 Outgoing) any make / type over current and earth fault relay secondary injection test any make SF6 circuit breaker 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, top up SF6 Gas complete all as specified and directed. Note : The rate quoted by contractor deemed to be including for 1 Incommer & 04 Ougoing as one job.

Labour only for repair to HT SF6 circuit breaker 11 KV 3 phase 630 Amp 250 MVA of installed at Electric Sub Stations after disconnecting the main supply incoming panel for repairs and replacement of following parts and refixing the same after repair and testing on full load (cost of spare parts and other job works will be paid under respective items), complete all as specified and directed. Note : (a) Rates are deemed to include the cost of all tools, materials and labour required for dismantling taking out and assembling of SF6 circuit breaker with replacement of worn out nuts and bolts gaskets A grade greasing and oiling of moving parts and refixing the same. (b) Rates are deemed to be included the cost of material and labour required to make alternative arrangement to bypass the electric supply through the HT panel or other HT line to avoid longer period of shut down of electric supply.

Supply and fix in repair of auxiliary switch 24 x 24 pole fixed in trolley matching as per the existing, complete all as specified & directed..

Supply and fix in repair space heater for panel HT/LT panel electrical panel switch gear panel boards / electronic insutuments panel heater box heater space heater 500 W complete all as specified and directed

Supply and fix in repair Epoxy and epoxy DMC insulator bush bar support 11 KV of size 130mm long 60 mm and as required on site, complete all as specified and directed

Supply and fix in repair current Transformer (CT) epoxy type upto ratio : 400 / 200 / 100 / 5-5A suitable for 11 KV suitable to SF6 circuit breaker 11 KV 600/400 Amps capacity requirement Burden CT shall be core 1:15 VA / 1.0, core 2:15 VA5P 10, complete all as specified and directed.

Supply and fix in repair Potential Transformer (PT) 11 KV suitable to SF6 circuit breaker 11 KV 600/400 Amps mounting on top draw, Out type metering and protection ratio 11KV / 110Volts :: 110 / 3VA class LV1 : 200 / 1.0, LV2 : 100 / 3P and as per site requirement, complete all as specified and directed.

Supply & fix in repair multifunction meter for SF6 circuit breaker panel as per existing make, complete all as specified & directed.

Supply & fix in repair of single phase permanent magnet motor of capacity 24 VDC, 25 Watt, 158 RPM burnt motor of SF6 circuit breaker for spring charging as per existing Type - NHP304283R1 complete all as directed & directed.

Supply and top up SF6 (Sulphur Hexafluoride) Gas in outdoor / indoor type HT 11KV SF6 circuit breaker (01 Incomer & 04 Outgoing), complete all as directed & directed.

Labour only for inspection of relays including connections in existing SF6 circuit breaker, Calibration of over current relay, calibration of earth relay, adjusting the setting of over current and earth fault, complete all as directed & directed. Note:- If any fault arises in SF6 circuit breaker, it should not travel to main SF6 circuit breaker or Main grid of state.

Supply and fixing protection relay set complete with all accessories comprising of over current relay-02 Nos and earth fault relay-01 No of existing make ASHIDA cat part No ADR141S with testing after installation complete all as specified and directed.

Supply installation and testing battery with DC battery bank pack of 240 volts 12 AH with input voltage 230 Volts +/- 2% comprising of battery 12 volts 12 AH - 02 Nos to deliver voltage of 24 volts DC with PWM based controller with minimum backup of 8 hrs and charging burden less than 100 VA alongwith surge protection and provision of auto set on syatem after reflection of faults, complete as specified and directed.

Supply and fix 12KV 63 / 100 Amps high tenson back up type HRC fuse unit with stricker pin of 80 N for trip indication suitable for existing load break switches including taking down old unserviceable fuse unit from breakers all as directed. (Make - ABB, Boshman, L&T or equivalent in other makes)

Material and labour for switch air break, triple pole, gang operated (GOD), complete 15 insulators with drop out fuse unit mechanically operated, mounted on insulators and steel frame, non-ferrous knife and spring loaded contacts, arcing hours of adequate sections to break magnitising current of the transformer, with operating mechanism worked from ground level, for current rating upto 400 Amps suitable for 11000 volts grade, AC supply, including taking down old & removal, complete all as specified and directed

Supply & Fix in repair Lightning arresters expulsion type complete with all fittings, transmission class, discharge capacity 65 Kilo Amp (Set of 3 Nos), Suitable for 11000 Volts, complete all as specified and directed

Material and labour in replacement of Danger notice plate of 1.6 mm thick mild steel sheet, vitreous enamelled white, with letter figures and conventional skull and bones signal red colour and fixed with MS clamps, bolts and nuts of approved size for HT 25 x 20 cm Size, complete all as specified and directed.

Supplying and laying synthetic rubber insulated mats 1m x 2m x 19mm thick for voltage upto 11 KV for electrical purspose as per IS-15652-2006, (Superseding IS 5424) suitable for electrical shock safety, complete all as specified and directed.

Supply only electrical hand gloves (1 Pair) 11 KV as Per IS 4770-1991-2002 for electrical purspose suitable for electrical shock safety, complete all as specified and directed

Material and labour for dismantling / cutting of existing road / path / hard standing cement concrete (unreinforced) in ground floors and pavings n.exc 15 cm thickness (below or above ground level) suitable for laying cable protection pipe 50 / 80 / 100 mm dia under the road / path / hard standing, complete all as specified and directed .

eurekaenterprises (BID ID -3402247)