Military Engineer Services Tender

M&L lifting of core assembly by opening of top cover and other items for checking of faults/repair and lowering / refixing the same in its original position after inspection to make it ready for transportation to carry out rewinding work in workshop including transportation of unservicieable transformer `630 KVA upto 2000 KVA capacity to workshop ( rate is deemed to be inclusive of transportation , T&P and men power ) complete all as specified and directed.

M&L for transportation of transformer of capacity upto 2000 KVA from MES Yard to site location using Hydra/Crane and truck as per requirement to replace defective transformer including installation, testing and connecting at site and to deposit the same to MES Yard after receipt and installation of repaired transformer at site complete all as specified and directed. Note:- Contractor must arrange for transportation and installation for replacement of alternative servicable transformer from another location directed by Engr-in-Charge for smooth functioning of electric supply.

Taking out the unserviceable copper winding from transformer 33 KV/433 V of capacity upto 315 KVA after opening top cover, and carrying out the following work complete all as specified and directed :- (a) Dismantling of all attachment viz breather assembly, conservator, oil temperature gauge, HT/LT bushing etc. and keeping aside for reuse.. (b) Taking out the core with winding assembly. (c) Removing of complete winding from core and dismantling the core, cleaning of core laminate sheet and keeping aside for reuse (d) Cleaning of complete transformer tank oil fins, removing of sludge, and making the inside surface of tank dry by blowing of hot air as directed and specified. (e) Painting of outside surfaces of transformer complete by means of spray machine as directed.

All as per item No 6 here-in -before but capacity of transformer 630 to 2000 KVA. Note for Item No 06 & 07 : - In case the defective transformer not repaired & installed at site within the specified period of 15 days from the date of handing over of defective transformer/complaint to contractor, a penalty recovery @ Rs 2500/- per day will be charged from his dues.

(a) Repairs to the transformer 33 KV/433V of capacity upto 2000 KVA as follows :- (i) Replacement of all insulating materials other than incorporated for rewinding of HT/LT coils as per existing. (ii) Fixing only HT procelain bushing with studs, nuts, washers 3 Nos. and LT procelain bushing with studs, nuts, and washers 4 Nos. and connection with primary and secondary windings and reconnecting with the main terminals as required and directed. (iii) Fixing only breather assembly, conservator, oil temperature gauge after proper cleaning, minor repairs etc. as required and directed. (iv) Replacement of all unserviceable gasket from top cover, HT/LT bushing with new one by using rubberised gasket sheet 4.0mm/6.0mm thick duly pasted with suitable adhesive . (v) Replacement of unserviceable bolts with new one and fixing of existing serviceable bolts, nuts, washers of different sizes and tightening properly. (vi) Repositioning of core and winding assembly inside the tank, assembling complete unit and making the transformer ready for filling oil and subsequent testing as directed. (vii) Filling/topping up of new transformer oil of required quantities . (b) M& L for transportation of transformer to the original position (from where taken-down), disconnecting the alternative transformer, taking down the same, Re-installation of repaired outdoor transformer on 4/6 pole structure/plinth/inside sub station, connecting electrically and mechanically, testing and commissioning complete all as specified and directed. (c) The following routine test as per IS 2026 (Part I) -1977 shall be carried out at repairing workshop/manufacturer having NABL Lab accredition and valid calibration of test equipments and shall submit MOU with any repairing from reputed workshop as per format attached along with quoted tender, (i) Measurement of winding resistance. (ii) Measurement of voltage ratio and check of voltage vector relationship. (iii) Measurement of impedance voltage/short circuit impedance (principal tapping) and load loss . (iv) Measurement of no load loss and current. (v) Measurement of insulation resistance. (vi) Dielectric tests (d) The contractor shall give written warranty of two year from the date of sucessfull testing and installation of transformer. The contractor shall submit test report from repair workshop for above mentioned test. Note :-HT/LT leg coils copper wire/strip and transformer oil required shall be measured and paid separately under relevant items of this Schedule here-in-after as supply only.

All as per item No 8 here-in -before but capacity of transformer 100 to 2000 KVA.

Supply and fill unused mineral insulating oils conforming to IS 335: 2018, Type II Class (Transformer oils), Uninhibited (U), pour point -10⁰C, vacuum filtered in a laboratory, Breakdown voltage of min 70 KV at 2.5 mm gap complete all as specified and as directed.

Filtration, Dehydration, reconditioning of transformer oil by using filtering equipment, vacuum dehydrator etc. to obtain minimum break down voltage of 60 kV and maximum water content of 30 mg/kg as per IS 1866: 2017 and IEC 60422: 2013 complete all as specified and as directed.

Supplying and fixing in replacement, Porcelain Transformer bushing on LT (440 Volt) side, including brass stems conical bush and gasket after disconnecting electrically and mechanically for indoor/outdoor transformer of capacity upto 315 KVA and re-connecting electrically and mechanically, testing complete all as specified and directed. Note.The rates quoted is deemed to be included the cost of necessary labour charges for draining out & re-filling transforer oil, opening of top cover by unscrewing nut, bolts washers and provision of pad type bus bar almuminium of approppiate size /capacities of transformers with nut bolt & washers.

All as per Serial item No 12 here-in-before but capacity 630 KVA to 2000 KVA

S & F in repairs HT side 36 KV/ 250 A bushing with copper stem including both porcelain parts and metal parts upto 200 KVA distribution transformer with accessories as per IS 3347 Part 5 (section 1 & 2) complete all as specified and as directed.

All as per Serial item No. 14 here-in-before but 250 KVA to 315 KVA

All as per Serial item No 14 here-in-before but 630 KVA to 2000 KVA

Supplying and fixing in replacement, all unserviceable gasket after disconnecting electrically and mechanically for outdoor transformer 33/.433 KV of capacity upto 315 KVA and re-connecting electrically and mechanically, testing complete all as specified and directed. Note. :- The rates quoted is deemed to be included the cost of necessary labour charges for draining out & re-filling transforer oil, opening of top cover by unscrewing nut, bolts washers etc.

All as per Serial item No. 17 here-in-before but 630 KVA to 2000 KVA

Supplying and fixing in replacement, Silica Gel Breather assembly including vent pipe and Silica Gel for outdoor transformers, capacity upto 315 KVA complete all as specified and directed.

All as per Serial item No. 19 here-in-before but capacity 630 KVA to 2000 KVA

S & F in repairs 25 mm dia gunmetal drain valve of transformer as per existing one along with iron wheel head,screwed both ends complete all as specified and as directed.

S & F in repairs 50 mm dia gunmetal drain valve of transformer as per existing one along with iron wheel head,screwed both ends complete all as specified and as directed.

Supply and fix in repairs metal oxide surge arrester without gap for AC system as per IEC 60099-4: 2014, outdoor type, polymer housing, single column and single phase construction, station class, medium duty, nominal discharge current 10 KA, switching impulse discharge current 1 KA, repetitive charge transfer rating (Qrs) more than 1.6 C, thermal energy rating (Wth) more than 7 KJ/KV, nominal system voltage 33 KV, highest system voltage 36 KV, rated voltage of arrester 27 KV, continuous operating voltage 21.6 KV, temporary overvoltage (30.45 KV for 1 s, 28.50 KV for 10 s, 26.35 KV for 100 s), rated short circuit current 20 KA, low short circuit current 600 A, insulation withstand level (lightning impulse voltage 1.2/ 50 µs) 170 KV, lightning impulse residual voltage (8/20 µs) at nominal discharge current maximum 70 KV, switching impulse residual voltage (30/60 µs) at switching impulse discharge current maximum 57 KV, high current impulse withstand capability (4/10 µs) 100 KA, minimum creepage distance 900 mm complete all as specified and as directed.

Supply and fix in repairs DO fuse assembly, suitable for horizontal and vertical operation, triple pole mounted on polymer HT insulator 6 Nos and mild steel galvanised steel frame rating upto 200 Amp, 33 KV complete with DO fuse and electrical connections, jumpering by ACSR conductor and connectors complete all as specified and as directed.

S & F in repairs gang operated air break switch as per IEC 62271-103 amended upto date, rocking/ tilting type, suitable for both horizontal and vertical mounting, three poles, outdoor type, nominal system voltage 33 KV, rated voltage 36 KV, rated frequency 50 Hz, continuous current rating 400 Amps, rated short time withstand current for three seconds 25 KA, rated peak withstand current for three seconds 62.5 KA, rated lightning impulse withstand voltage (i) to earth and between poles 170 KV (Peak) (ii) across the isolating distance 195 KV (Peak), power frequency withstand voltage between (i) earth & poles 70 KV (rms) (ii) across the isolating distance 80 KV (rms), minimum isolating distance in open position 520 mm, phase to phase clearance 1220 mm, minimum cross sectional area of fixed contact 300 sqmm, minimum cross sectional area of moving contact 250 sqmm, copper connector having minimum cross sectional area of 250 sqm, maximum current density of 1.6 Amps/ sqmm for all current carrying parts, single number of brake per phase, medium grade galvanised iron pipe of 32 mm nominal bore and 5 to 6 metre length in single piece for operating pipe, pad-locking in both ‘on’ and ‘off’ position with indicators, electroplated nonferrous parts, hot dip galvanised ferrous parts, 3 Nos polymer post insulator per phase as per IEC 61109 amended upto date having rated voltage 36 KV, minimum creepage distance 900 mm, impulse withstand voltage 170 KV, wet power frequency withstand voltage 75 KV, dry wet power frequency withstand voltage 75 KV complete all as specified and as directed.

M& L for servicing of 33 KV gang operated air break switch, any type (horizontal or vertical) by cleaning the contact, greasing, applying petroleum jelly at the contact point, checking serviceability and including replacement of heavy duty brass jaw and blade set, copper strip set, lugs, nuts, bolts, washers, aluminium thimbles, jumpers, all as per the existing complete all as specified and as directed. Note: - (1) The cost for replacement of brass jaw, blade set, copper strip set, lugs, nuts, bolts, washers, aluminium thimbles, jumpers, lubricating materials, etc. shall be deemed to be included in the unit rate quoted by the contractor for the item.

Material & Labour for painting of transformer installed on plinth/4/6 pole or on plinth structures at various site of capacity upto 200 KVA with existing colour, with spraying machine, after cleaning, preparation of outer surface of transformer, including writing of SM No, MES and capacity of transformer complete all as specified and directed.

Material & Labour for painting of transformer installed on plinth/4/6 pole structures at various site of capacity 250 to 315 KVA with existing colour, with spraying machine, after cleaning, preparation of outer surface of transformer, including writing of SM No, MES and capacity of transformer complete all as specified and directed.

Earthing complete in replacement with galvanized steel earth plate electrode of size 60cmx60cmx6 mm thick, buried directly in ground (earth pit not less than 3.5 m below normal ground level) with top edge of earth plate not less than 2.5m below normal ground level, connected to galvanized iron strip 32X6 mm by means of electric arc welding of galvanised iron or steel as shown in electrical plate No 3 of SSR Part I, connected to earth test point and the equipment on the other side complete all as specified, including testing and commissioning complete all as directed. Note : - (a) The unit rates quoted against this item shall be deemed to include the cost of excavation and earth work in any type of soil, common salt & charcoal dust in alternate layers, PCC 1:3:6 as in pit, precast RCC 1:2:4 type B-1 with necessary reinforcement as in cover & frame for pit, funnel, watering pipe 20 mm bore GI pipe light grade, protection pipe 40 mm bore GI pipe light grade etc. (b) The quoted rates shall also deemed to include the cost of earth test point and earth strip/GI earthing and protection pipe upto 7.5 meter beyond the earth plates electrode.

Material & Labour for replacement of jumper/bus bar made of ACSR conductor of existing size on HT Four/Six pole structure having 3 incoming/outoing feeder including bus bar with PVC sleeve , lugs , nut bolts and washers complete all as specified and directed.

M & L for 2 coat of aluminium painting over a coat of red oxide to steel surfaces of HT 4 pole structure (Angle Iron/MS channel /MS clamp etc) including preparation of old surface complete all as specified and directed.

M & L for 2 coat of aluminium painting over a coat of red oxide to steel surfaces of HT 6 pole structure (Angle Iron/MS channel /MS clamp etc) including preparation of old surface complete all as specified and directed.

M & L for cutting and removing grass, vegetation bushes etc from surrounding 4 pole/6 pole HT structure , outside area of HT/LT installation and removing all rubbish to a distance not exceeding 50 m complete all as specified and directed.

Disconnecting electrically & mechanically outdoor transformers upto 315 KVA capacity, lowering down/getting out from plinth carefully for repairing /making of plinth of transformer and re- connecting electrically and mechanically after repairing/making of plinth , testing and commissioning complete all as specified and directed. Note:- (a) Rate is deemed to be inclusive for hydra , men power, and other items required for temp energization of transformer. (b) M&L used to repair the Plinth shall be measured and paid separetely under items of sch of work here-in -after.

Excavation in trenches not exc. 1.5 m wide and not exc 1.5 mtr deep in any type of soil (soft/losse soil) for foundation of transformer etc and getting out and levelling of bottom suface to required level complete all as specified and directed.

Returning filling in, including spreading, levelling,. Watering and well ramming soil in layers not exceeding 25 cm thick complete all as specified and directed.

Removing excavated material (ie soil) from site to a distance n. exc 50 mtrs away and depositing where directed at a level n. exc. 1.5 mtr above the starting point complete all as specified and directed.

M & L sand filling in-trenches with clean dry sand unwashed including gently pruning around cables complete complete all as specified and directed. Note:-punned thickness only measured for payment.

S&F in replacement 100 mm bore GI Pipe light grade with necessary accessories/ fittings for cable protections complete all as specified and directed.

M & L for PCC 1:3:6 type C-2 (using 40 mm gradded aggregate) for foundation, filling and mass concrete etc complete all as specified and directed.

M & L for cement concrete type B-1, 1:2:4, 50 mm thick (using 20 mm gradded aggregate) for floors and paving etc complete all as specified and directed.

Supply and fill in replacement silica gel in breather of transformer complete all as specified and directed

Supply & Fix drop out fuse for 33 KV line, 3.5 to 50 A complete all as specified and as directed.

Supply only pressure sensitive adhesive plasticized PVC tapes with non-thermosetting adhesive, designation F-PVC/90/0/Tp, general purpose application for electrical insulation, plasticized poly vinylchloride backing material, thickness 0.13 mm, width 25 mm, length 30 metre all as per IS 7809 (Part 3/section 1): 1986

M & L for loose filling with broken stone or boulder aggregates of gauge 40 to 80 mm in soakage pits, soakage wells, on open space etc. complete all as specified and as directed.

M & L in repair for tap changer off load type suitable for transformer of capacity 100 KVA to 630 KVA complete all as specified and as directed.

M&L in replacement 32x6mm galvanised iron strip for earth continuity conductor for earthing of transformer , GOD , 4/6 pole , structure etc complete all as specified and directed.

Disconnecting existing incoming & outgoing connections and repair, overhauling and maintenance of VCB, 33 KV, 400 to 630 Amps, 26.3 KA, vertical or horizontal isolation, installed with receiving, distribution system and capacitor bank including cleaning, greasing mechanical parts of VCB, checking operation manually and motorized with remote panel for tripping and closing, checking of CTs/PTs, internal wiring, checking of different functional parts and setting/ calibration of VCB installations including the followings: - (a) checking the condition and alignment of jaw contact and protection system calibration of triple pole overload/earth fault relay with all three phase, trip supervision relay, checking proper functioning of auxiliary relay, master relay etc. lock out under voltage relay & outgoing. (b) checking the proper connection of hardware, alarm system with hooter and reset push button system and auxiliary alarm cancellation relay system. (c) checking the breaker tripping through push button, metering system and replace the same if required as site requirement for ammeter & voltmeter with selector switch, frequency meter, indicator LED lamps for ON / OFF flushed with front of panel on incoming & out going sides. (d) checking insulation resistance between phase to phase, phase to earth in open & closed position and adjusting the clearances between the components and the operation of manual charging of the system button for ON/OFF. (e) checking and testing of relays through secondary injection, checking of motor operated spring stored energy trip and closing coil system. (f) checking of VCB through Buchholz relay/OTI/WTI, auxiliary switching system for manual charging & all metering equipments. (g) checking the CT coils & replace the same if required for proper functioning. (h) checking the potential transformer fitted on top of the VCB along with metering equipments and functioning and reconnect the same with as per site requirements. (j) checking the DC wiring system & battery bank and repair and replace the same as per site requirement. (k) Dusting/cleaning by smooth brushing or dry cotton and lubricating of movable mechanism suitably with oil/grease and painting with enamelled paint by scrapping the rusted surface and replacement of unserviceable/ burnt out/worn out spare parts with new one as per existing make, duly commissioned in the VCBs at 33 kV at MRS Bairagarh Mil Stn under the GE including taking down/dismantling of existing unserviceable spares parts of VCB/Capacitor Banks all as directed by Engineer-in-charge. (l) Calibration of VCB Panel and necessary report to be furnished to the department. Note: - (i) The quoted rate shall be inclusive of required T & P for including servicing, overhauling, calibration and testing etc. (ii) The new spare parts required for replacement shall be paid and measured separately as S & F in repairs. (iii) Servicing, overhauling, calibration and testing etc. shall be carried out as per the Manufacturer’s instructions/ guideline and by the authorised rep of the manufacturer and the necessary literature shall be made available to the department. The quoted rate shall be inclusive of these aspects.

Testing of over current & earth fault IDMT relays as per time/ current characteristics by secondary injection test at 50%, 75%, 100 % plug setting and operating time at twice the set value & TMS 1 and calibrating including well cleaning and decarbonizing of relay contacts.

Material and Labour for the followings testing of current transformers of any capacity on the site at different locations under the GE and submission of reports to the Engineer-in-Charge including servicing and calibration of current transformers complete all as specified and as directed. (a) Mechanical Check and Visual Inspection (b) Insulation Resistance Test (c) Polarity Test (d) Secondary / Loop Resistance Test (optional test) (e) Burden Test (optional test) (f) Magnetization Curve Test (optional test) (g) Turns ratio Tests (h) Primary Injection Test (i) High Voltage Test

Material & Labour for insulation resistance test, voltage transfomer ratio test, polarity test and winding resistance test of potential transformer of any capacity on the site at different locations under the GE and submission of reports to the Engineer-in-Charge complete all as specified and as directed.

M & L for testing of battery bank panel using battery life cycle tester and measuring starting voltage, end voltage, starting time, end time, test current, charge in AH, charge in WH, ambient temperature, battery temperature, capacity in AH, capacity in WH, watt-hour efficiency, ampere-hour efficiency, loss of capacity, cyclic efficiency and submission of reports to the Engineer-in-Charge including addition of distilled water, putting white jelly on terminal, checking PCB, circuit and replacing and defective parts complete all as specified and as directed.

Cleaning of complete remote panel, tightening and checking of control wiring, visual inspection of any defects, measuring insulation resistance value and rectifying defects including wires, lugs, ferrule, terminals complete all s specified and as directed.

S & F in repair of spring charging gear motor for 33 KV VCB of Areva Make and as per the existing complete all as specified and as directed.

S & F in repairs of spring charging handle for 33 KV VCB of Areva Make and as per the existing complete all as specified and as directed.

S & F in repairs TNC (Trip Neutral Close) switch suitable for 33 KV VCB panel of battery capacity 12 V, 180 AH, emergency stop button including indication lamp with necessary electrical connections and as per the existing complete all as specified and as directed.

S & F in repair of push button (ON & OFF) for control panel of 33 KV VCB and as per the existing complete all as specified and as directed.

S & F in repair of indicator lamp for VCB panel of 33 KV VCB and as per the existing complete all as specified and as directed.

S & F in repair of 24 V DC buzzer hooter for remote relay for VCB panel of 33 KV VCB and as per the existing complete all as specified and as directed.

S & F in repair of auxiliary switch with replacement of complete existing wiring, 8/ 12 way, outdoor type for VCB panel of 33 KV VCB and as per the existing complete all as specified and as directed.

S & F in repair of trip coil assembly (30 V DC) for VCB panel of 33 KV VCB and as per the existing complete all as specified and as directed.

S & F in repair of tripping mechanism for VCB panel of 33 KV VCB and as per the existing complete all as specified and as directed.

S & F in repair of closing coil assembly for VCB panel of 33 KV VCB and as per the existing complete all as specified and as directed.

S & F in repair of closing mechanism assembly for VCB panel of 33 KV VCB and as per the existing complete all as specified and as directed.

S & F in repair of spring charging mechanism for VCB panel of 33 KV VCB and as per the existing complete all as specified and as directed.

S & F in repair of tripping spring for VCB panel of 33 KV VCB and as per the existing complete all as specified and as directed.

S & F in repair of closing spring for VCB panel of 33 KV VCB and as per the existing complete all as specified and as directed.

S & F in repair of spring charging closing buffer for VCB panel of 33 KV VCB and as per the existing complete all as specified and as directed.

S & F in repair of contactor 24 Volt DC Auxilliary supply 4 No 2 NC for VCB panel of 33 KV VCB and as per the existing complete all as specified and as directed.

S & F in repairs single core flexible conductor FR-LSH cables, PVC insulation of type D and having PVC sheath of type ST3, 4 sqmm as per IS 694: 2010, ISI marked, annealed, multistranded copper conductor for CT wiring complete all as specified and as directed.

S & F in repairs two core flexible conductor FR-LSH cables, PVC insulation of type D and having PVC sheath of type ST3, 10 sqmm as per IS 694: 2010, ISI marked, annealed, multistranded copper conductor for wiring from battery bank to control panel complete all as specified and as directed.

S & F in repairs eight core flexible conductor FR-LSH cables, PVC insulation of type D and having PVC sheath of type ST3, 2.5 sqmm as per IS 694: 2010, ISI marked, annealed, multistranded copper conductor for control panel wiring complete all as specified and as directed.

S & F in repair of three phase over current plus earth fault relay high set with CT rating 1A to 5A, field selectable type of auxiliary supply 24 V DC and 240 V AC, output contacts 2NO+2NC with password protection as per Model MC61Anx, catalogue No. MC61ANX2200 of L&T equivalent of Make mentioned under Appendix "B" complete all as specified and as directed.

S & F in repair of three phase over current plus earth fault relay high set with CT rating 1A to 5A, field selectable type of auxiliary supply 24 V DC and 240 V AC, output contacts 4 Nos (2NO+2NC) with password protection as per Model MC31Anx, catalogue No. MC31ANX4000 of L&T equivalent of Make mentioned under Appendix "B" complete all as specified and as directed.

S &F in repair small and big gear assembly for spring charging mechanism for outdoor type VCB of make CROMPTON GREAVES of rating voltage 36 KV ,breaking capacity 26.3 KA ,current rating 400 Amp,short time current 26.3 KA for 1 sec,frequency 50 Hz complete all as specified and as directed.

Supply & laying unreinforced precast concrete cable cover class HV type 2, flat shape, dimension 450 mm X 180 mm X 40 mm as per IS 5820: 1970 complete all as specified and directed.

Disconnecting, taking out old unserviceable under ground cable of rated voltage 33 KV, nominal cross sectional area of main conductor 185 sqmm, 3 core, any type from trenches including taking out concrete cable cover/ bricks etc. including removing materials to store for keeping in safe custody or for reuse or for taking credit (credit for above items should be made as per conditions separately) complete all as specified and directed.

Supply, laying and testing cross linked polyethylene (XLPE) insulated, PVC sheathed cables for working voltages 33 KV (E), three phase, earthed system, 3 core, screened, armoured power cable, 185 sqmm of nominal area of conductor, aluminium conductor, ISI marked as per IS 7098 (Part-II): 2011 laid in trenches or under floors making all connections with necessary glands lugs bushing complete all as specified and as directed.

S & F XLPE cable end termination, cold shrinkable, outdoor type complete with jointing material and accessories suitable for voltage 33 KV (Earthed), 3 core, 150 sqmm to 225 sqmm complete all as specified and as directed.

Supplying & laying in trenches, in road cutting and along pole 150 mm nominal bore, light grade, galvanised coated steel tube conforming to IS 1239 (Part-1): 2004 including all fittings conforming to IS 1239 (Part-2): 2011 complete all as specified and as directed.

Dismantling insulators any type, any size complete all as specified and as directed.

S & F in repair of polymer pin insulator, Type B, Nominal System voltage 33 KV, highest system voltage 36 KV, visible discharge test voltage 27 KV, wet power frequency withstand voltage 75 KV, power frequency puncture withheld voltage 180 KV, impulse withstand voltage 170 KV, minimum total creepage distance 580 mm, minimum failing load 10 KN, of suitable size with galvanised steel insulator pin, nut, washers complete all as specified and as directed.

S & F polymer shackle insulator, Type B, Nominal System voltage 33 KV, highest system voltage 36 KV, visible discharge test voltage 27 KV, wet power frequency withstand voltage 75 KV, impulse withstand voltage 170 KV, minimum total creepage distance 580 mm, minimum failing load 70 KN, of suitable size with galvanised steel stud pin, nut, washers complete all as specified and as directed.

S & F polymeric composite disc insulator, ball and socket type, Type B, Nominal System voltage 33 KV, highest system voltage 36 KV, visible discharge test voltage 27 KV, wet power frequency withstand voltage 75 KV, impulse withstand voltage 170 KV, minimum total creepage distance 580 mm, minimum failing load 70 KN, of suitable size with galvanised steel stud pin, nut, washers complete all as specified and as directed.

M & L in repair for disconnecting and taking out worn out jumpers of HT / LT overhead line at cut point/ at two pole/ four pole structure of any size any length as per existing after removing binding wire connector of AB switch/DO fuse unit, replacement of old jumper with the new ACSR conductor (Mink/ Dog conductor as directed by Engineer-in-Charge) Jumpers Including PVC sleeve in colour coding R/Y/B of same size and length including new binding wire connectors suitable for AB switch/DO fuse unit, with providing conducting jelly complete all as specified and as directed. (Note: -Each Jumper to be measured separately)

Dismantling stay assembly complete (Note: Demolition of concrete, etc. and excavation measured shall be measured and paid separately separately.)

M & L for stay assembly of stay rod of diameter 20 mm complete with accessories as shown in electrical plate No. 1 (loop type insulator, stay clamps, excavation and concrete measured separately) complete all as specified and as directed.

M & L in repair of hot dip galvanized stay strands of grade I, 7 Nos wires construction, wire diameter 3.15 mm, nominal strand diameter 9.45 mm, heavy zinc coating complete all as specified and as directed.

M & L in repair of loop type insulator (porcelain guy strain insulator), large size, with overall dimensions 140 mm X 90 mm, cable hole dia 25 mm, creepage distance 57 mm, minimum failing load 88000 N, vitreous porcelain, white, brown or green, Designation C as per IS 5300: 1969 complete all as specified and as directed.

M & L for trimming of branches of trees touching HT/LT Electric over head line and making clear about 3 m in radius and carrying and disposal where directed not exceeding 50 m complete all as directed. Note :- Vehicle and othe T&P shall be arranged by the contractor at own cost.

Supply and fixing in repair of HT RCC Precast cable route marker of size 650x300x100 mm with steel (TMT Bar) uses of 8 mm and 6 mm complete all as specified and as directed.

Replacement of factory made RCC precast earthing pit cover chamer of size 600 mm x 600 mm x 450 mm & 50 mm thick complete all as specified and directed.