COMPREHENSIVE MAINTENANCFE SERVICING AND CLIBRATION OF HQ VCBs RMUs MAINTENANCE OF CTs PTs AND MAINTENANCE OF 33 KV GRID AND CONNECTED WORKS AT AF STN NAL

Amount

Excavation in trenches not exceeding 1.5 metre wide and not exceeding 1.5 metre in depth for laying of cable and getting out in soft / loose soil complete all as specified and as directed. Note:- (I)Old unservicable bricks shall be sold to contractor under Sch of credit. (iii) Serviceable bricks/PCC cover stacked for reuse.

Returning, filling in trenches including spreading, levelling, watering and well ramming in layers not exceeding 25 cm in soft / loose soil complete all as specified and as directed.

Removing excavated materials to a distance not exceeding 50 metre and depositing where directed at a level not exceeding 1.5 metre above the starting point complete all as specified and as directed.

Material and labour sand cushioning (Tibba Sand) for protection of underground cable, consolidated and compacted with clean dry sand complete all as specified and as directed.

Supply and laying Precast unreinforced Concrete cable covers Class HV, type 1 flat of size 300mm x 180mm x 40 mm for HT cable all as specefied

Laying only Precast unreinforced concrete cable covers of existing size retrieved from item No 1.0 below complete all as specified and as directed .

Material and labour well burnt old size sub Class ‘B’ bricks, laid flat, in trenches for cable protection complete all as specified and directed by Engineer-in-charge

Laying only serviceable old bricks retrieved from item No 12 & 13 below.

Taking out HT un-serviceable / faulty cable of Cross sectional area 95 sq mm, 3 core from trench / pole / cable duct carefully incl bricks, pipe and stacking properly for disposing off from site or for relaying in same place complete all as directed Note : (i) Excavation and earth work shall be measured and paid separately. (ii) Unit rate of this item include the cost of taking out brick protection/ tiles and GI Pipe etc as applicable. (iii) Old serviceable cable shall be stored properly for relaying / handing over to contractor for disposal off from site. (iii) Old serviceable cable cover shall be used as Laying only under revelant item of this schedule .

Laying only including testing of HT serviceable PVC / XLPE insulated 11000 Volts grade aluminium conductor cable Cross sectional area 95 sq mm, 3 core in trench or fixed to wall /passing through pipe / pole complete all as specified and directed. Note : (i) Old serviceable cable retrived under Item No. 9.00 here-in-before shall be used in the work. (ii) Brick protection, concrete cable cover, sand cushioning shall be measured and paid for separately.

Supply, laying and testing XLPE insulated, armoured 11000 Volts grade aluminium conductor cable, Cross sectional area 95 sq mm, 3 core, as per IS-7098 (Part-II), in trenches or fixed to wall /passing through pipe / pole, as directed for the following cross sections. Note : (i) Excavation and earth work shall be measured and paid for separately. (ii) Concrete cover protectioin and sand cushining shall be measured and paid for separately. (iii) Pipe including clamps shall also be measured and paid for separately.

Supply and laying XLPE insulated, armoured, heavy duty, 1100 Volts grade aluminium conductor cable Cross sectional area 95 Sqmm, 3.5 core in trenches or fixed to wall / passing through pipe / pole and testing compete all as specified and directed by Engineer-in-charge Note : (i) Excavation & earth work, Brick protection and sand cushining shall be measured and paid for separately,

All as per description of item No.12 here-in-before but Cross sectional area 150 sq mm, 3.5 core

Material and labour straight through joint HT 11000 volts grade heat shrinkable of cable Cross sectional area 95 Sqmm, 3 core complete all as specified and directed. Note : 1. Excavation & earthwork shall be measured and paid for separately

All as per description of serial item No. 14.00 here in before but for cable of cross sectional area 120 sqmm, 3 core complete all as specified and directed.

All as per description of serial item No. 14.00 here in before but for cable of cross sectional area 50 to 95 sqmm, 3 core complete all as specified and directed.

All as per description of serial item No. 14.00 here in before but for cable of cross sectional area 120 sqmm, 3 core end termination cable joint complete all as specified and directed.

Material and labour end termination joint (Indoor type) heat shrinkable HT 11000 volts grade of cable Cross sectional area 70 Sqmm, 3 core complete all as specified and directed.

All as per description of serial item No. 18.00 here in before but for cable of cross sectional area 95 sqmm, 3 core

All as per description of serial item No. 18.00 here in before but for cable of cross sectional area 120 sqmm, 3 core

Supply and fixing GI tubing light grade 80 mm bore for cable protection complete all as specified and directed. Note:- Cost of taking out of pipe included in unit rate for taking out cable here-in-before.

Tracing out fault in 11KV underground cable any size with the help of fault detection machine and rectifying the same with joints as specified and directed to restore the supply complete all as specified. Note: (i). Joint kit shall be measured and paid separately. (ii) Earth work shall be measured and paid separately. However, width of trenches shall be allowed for payment as per authorized width given in SSR for each size of cable. (iii) All other necessary arrangements suitable for locating the faults deemed to be included in the unit rate quoted. (iv) T&P required for the entire job shall be provided by the contractor at his own end and nothing extra shall be admissible on this account. (v) Cable required, if any shall be measured and paid for separately. (vi) Fault & location thereof shall be traced within 12 hours of intimation by the Engineer-in-Charge and shall be rectified within given time frame

Material and labour Servicing of 33 KV Potential Transformer, cleaning of core, checking of all connections replacement of oil and testing of all connections complete all as specified and directed.

Material and labour servicing of 33 KV Current Transformer, cleaning of core, replacement of oil (40 Ltr), testing of all connection complete all as specified and directed.

Supply and fixing as in repairs PG clamp die cast aluminium of suitable size and for fixing clampling ACSR conductor connections for PT's CTs isolators all as specified

Disconnecting, opening of indoor type VCB/SF6 of any description and any make of rating 11 KV 400/630/800 Amps capacity for servicing / overhauling, taking out and removing unserviceable / defective parts including cleaning & servicing, greasing, oiling of the parts etc and replacement of unserviceable parts with new one, reassembling the VCB after overhauling/ servicing and its testing complete all a specified and directed. Note: (i) Replacement of unserviceable parts shall be measured and paid separately under relevent item of Sch 'A' as supply only but fixing charges of the parts replaced /repaired is deemed to be included in the item rate. (ii) Servicing shall be got carried out by the authorised rep of the VCB manufacturer and the service engineer will submit a service report and calibration certificate for each VCB. (iii) Any item not included in CA and required for successful operation of the panel will be provided by the contractor & same shall deemed to be included rate quoted. (iv) Test report of all parameter duly signed by Competent engineer, Contractor and Engineer-in-charge shall be maintained on records .

Supply only following parts suitable for 11KV VCB, 400/630 Amps capacity of Make : Crompton/Megawin/Yamuna Denson/ABB Ltd, Alstom) dismantled / fixed under Sch 'A' item No: 32 here-in-before complete all as specified and directed.

Isolating contact assembly 400/630/800 Amps suitable for 11 KV/400/630/800 Amp VCB Panel

TNC switch for 11 KV VCB Panel

Indication lamp LED type suitable for 230 Volts AC 50Hz and 110/30 Volts DC supply.

Supply only HRC fuse 11 KV grade 5 Amps.

Vacuum interrupter suitable for 400/630/800 amps, 11 KV HT VCB complete all as specified and directed

Motor & gear assembly 230V AC suitable for 400/630/800 amps, 11 KV HT VCB including testing & puting on load complete all as specified & directed.

Spring bearing gear suitable for 400/630/800 amps, 11 KV HT VCB complete all as specified and directed

Closing coil assembly 24 volts DC suitable for 400/630/800 amps, 11 KV HT VCB complete all as specified and directed

Tripping coil assembly 24 volts DC suitable for 400/630/800 amps, 11 KV HT VCB complete all as specified and directed

Panel door lock suitable for 400/630/800 amps, 11 KV HT VCB complete all as specified and directed

Auxillary switch (7 No + 7NC) suitable for 400/630/800 amps, 11 KV HT VCB complete all as specified and directed

Digital Volt meter Secondary voltage 110 V for 11 KV VCB Control Panel.

Upper connector suitable for 400/630/800 amps, 11 KV HT VCB complete all as specified and directed

Lower connector suitable for 400/630/800 amps, 11 KV HT VCB complete all as specified and directed

Support road with screws suitable for 400/630/800 amps, 11 KV HT VCB complete all as specified and directed

SF6 Gas

Supplying and fixing in replacement of the IDMT relays (Make : Crompton / Megawin / Yamuna Denson / ABB Ltd, Alsthom) with instant tripping system, voltage 18 to 52 V & 75 to 250V including taking out the existing unserviceable IDMT relay ( CGI 14S Self power relay) complete all as specified and as directed .

Supplying and fixing in replacement of the IDMT relays of the IDMT relays (Make : Crompton / Megawin / Yamuna Denson / ABB Ltd, Alsthom) with instant tripping system, voltage 18 to 52 V & 75 to 250V including taking out the existing unserviceable IDMT relay ( CGI 14N Over current relay) complete all as specified and as directed .

Material and labour testing and calibration of 11KV VCBs / SF6 indoor type alongwith control panel and control wiring, protection system and relays system (relay to tripping coil auxiliary switch male and female housing cut outs etc) , checking the functional status of vacuum interrupter, insulation resistances, static contact resistance, Testing (IR value, Ratio test, Polarity test) and connection verification of 11 KV Current transformer (Set of three) by PRIMARY INJECTION KIT and Testing and calibration of relay (set of two Over current and one earth fault) by SECONDARY INJECTION KIT including all other functional tests of the VCB, C&R panel and CTs, PTs. complete all as specefied and directed. NOTE : Test report of all parameter duly signed by Competent engineer, Contractor and Engineer-in-charge shall be maintained on records .

Material and labour testing and calibration of 11KV RMU (3 way) of Make : Schneider . outdoor type alongwith control panel and control wiring, protection system and relays system (relay to tripping coil auxiliary switch male and female housing cut outs etc) , checking of quality of vacuum interrupter, insulation resistances, static contact resistance, Testing (IR value, Ratio test, Polarity test) and connection verification of 11 KV Current transformer (Set of three) by PRIMARY INJECTION KIT and Testing and calibration of relay (set of two Over current and one earth fault) by SECONDARY INJECTION KIT including all other functional tests of the VCB, C&R panel and CTs, PTs. complete all as specefied and directed. NOTE : Test report of all parameter duly signed by Competent engineer, Contractor and Engineer-in-charge shall be maintained on records

All as per description of serial item No. 31.00 here in before but for 11KV RMU (4 Way) complete all as specified and as directed .

All as per description of serial item No. 31.00 here in before but for 11KV RMU (5 Way) complete all as specified and as directed .

Material and labour testing and calibration of 11KV Air insulated indoor type switch gear panel voltage rating 12KV , Busbar rating 1250 Amp , 800 Amps short circuit capacity 26-3 KV , VCB of Make : Schneider alongwith control panel and control wiring, protection system and relays system (relay to tripping coil auxiliary switch male and female housing cut outs etc) , checking of ,insulation resistances, static contact resistance, Testing (IR value, Ratio test, Polarity test) by PRIMARY INJECTION KIT and Testing and calibration of relay (set of two Over current and one earth fault) by SECONDARY INJECTION KIT including all other functional tests of the VCB, C&R panel and CTs, PTs. complete all as specefied and directed. NOTE : Test report of all parameter duly signed by Competent engineer, Contractor and Engineer-in-charge shall be maintained on records .

Disconnecting the 33 KV Outdoor VCB unit and indoor control panel capacity upto 1600 Amp , overhauling of complete unit, opening the total mechanical and electrical mechanism of breaker checking its contact , baffles plates and other minor parts , cleaning the complete accessories carefully. minor repairs rectified , parts/accessories cleaned the tank , baffle plates , rotating contact ,upper supports ,lower support ,drive assemblies and all other spare parts , reassembled after repair/replacement of the spare parts including calibration, testing of existing IDMT relay as per load parameter complete all as specified and directed . Notes : (i) Repair work shall be carried out only by the authorised technician of manufacturer of VCB. (ii) Spare parts as required for replacement of existing worn out parts shall be measured and paid separately under appropriate items . (iii) Labour for replacement / fixing of the supply only items shall be deemed to be included in the unit qouted against this item . (iii) Make of all spare parts shall be used as per existing make of manufacturer . (iv) Test report of all parameter duly signed by Competent engineer, Contractor and Engineer-in-charge shall be maintained on records ..

Supply and fixing in replacement multi stranded copper conductor cable , 1100 volts grade (ISI Marked ) , FRLS , PVC insulated and unsheathed of size 2.5 Sqmm 2 core complete all as specified and as directed .

Supply and fixing in replacement multi stranded copper conductor cable , 1100 volts grade (ISI Marked ) , FRLS , PVC insulated and unsheathed of size 1.5 Sqmm single core complete all as specified and as directed .

Taking down old unserviceable GI plate earthing and material and labour as in replacement of earthing complete with copper earth plate electrode 600 mm x 600 mm x 3.15 mm thick, burried directly and preferably vertically in ground , earth pit not less than 2.25 mtr deep below ground level with top eadge of the plate not less than 1.5 mtr below ground level. The earth plate to be connected with copper earthing strip and arth plate of size 20 mm x 3 mm thick by means of brazing between copper strip and earth plate min 45 cm in vertical length and copper strip also to be joined by brazing only.The copper earthing strip to be protected by galvanlsed iron pipe 40 mm bore (medium grade) upto ground leveland there after with 40 mm dia HDPE pipe upto test point. Earthing shall be included with providing funnel with 20 mm bore galvanised iron pipe (light grade), wire mesh , charcoal or coke and common salt in alternate layer of 15 cm (compacted thickness) upto 90 cm all round earth plate further filled with 60 cm thick Tibba sand and second layer with 30 cm of Magnesium Sulphate powder ( compated thickness)3 rd layer with Tibba sand up to the ground level. Earthing shall also be in clude for providing concrete earth pit in PCC (1:3:6) type C -1 (with 20mm grade aggregate), 50 mm thick precast RCC (1:2:4) cover slab (re inforced with Excavation, returning filling and removal of surplus soil upto a distance not exceeding 50 mtr etc all as shown on electrical Plate No 3 of MES schedule Part I complete to obtain less than 2 Ohm earth recistance value , complete all as spcified. Note :- Plate No 3 of SSR Part I is given is given for guide of earth chamber.

Material and labour as in replacement chemical earthing complete with copper earth plate electrode 900 mm x 600 mm x 5 mm thick buried directly in ground vertically in a pit of depth not less than 3.65 metre below normal ground level with top edge of the earth plate at a depth not less than 2.90 metre below normal ground level, earth plate connected to copper strip 32 x 6 mm as earthing lead by means of running gas welding / brazing for a length of 45cm, copper strip protected by galvanized steel pipe 50 mm bore medium grade upto ground level and there after by 50 mm dia HDPE pipe upto test point (maximum upto 7.5metre from earth plate), earth plate surrounded by charcoal or coke and common salt upto 90 cm in alternate layers of 15cm each, thereover a layer of 60cm tibba sand duly compacted, thereafter 30 layer of magnesium sulphate powder (compacted thickness) and finally filing the top of pit upto ground level with tibba sand, to achieve earth resistance value less than 1 Ohm including provision of 20mm bore galvanised steel pipe 20mm bore light grade with funnel & wire mesh for watering, earth pit chamber built in cement concrete 1:3:6 type C-1 using 20mm graded stone aggregate covered with 50mm thick pre-cast cover slab of RCC 1:2:4 type B-1 duly reinforced with 8mm dia MS TMT bars @ 15cm c/c both ways, with suitable handle made of 10mm dia MS round bar, including excavation & earthwork in any type of soil / strata, removal of surplus soil to a distance not exceeding 50 metre as shown in Electrical Plate No. 3 of MES Schedule Part-I complete all as specified and directed.

Material and labour in replacement of earthing complete with GI earth plate electrode 600 mm x 600 mm x 6 mm thick, burried directly and preferably vertically in ground, earth pit not less than 2.25 Mtr deep below ground level with top edge of the plate not less than 1.50 Mtr below ground level. The earth plate to be connetced with earth lead of 25x4 mm GI strip all as shown in para no 4 the earthing test point all as specified and directd.The GI earthing strip to be protected by galvanised iron pipe 40 mm bore (medium grade) up to ground level and there after with 40mm dia HDPE pipe up to test point. Earthing shall be include with providing funnel with 20mm bore galvanised iron pipe (light grade), wire mesh, charcoal or coke and common salt in alternate layer of 15cm (compacted thickness) up to 90 cm all around earth plate further filled with 60 cm thick Tibba sand and 2nd layer with 30 cm of Magnesium sulphate powder (compact thickness ) , 3rd layer with tibba sand up to the ground level. Earthing shall also be include for providing concrete earth pit in PCC (1:3:6) type C-1 (with 20mm graded , crushed stone aggregate), 50mm thick precast RCC (1:2:4) cover slab (re-inforced with 8mm dia TMT bar @ 15 cm C/C bothways and suitable handle made of 10mm dia) including necessary earth work all as specified and directed.

Supplying and fixing in replacement of Potential Transformers oil cooled outdoor type ,33 kV single phase having ratio 33 kV / rt3 / 110 / rt3 /110 / rt3 , complete all as specified and as directed .

Supplying and fixing in replacement of Current Transformers oil cooled outdoor type ,33 kV single phase having ratio 100/5 , complete all as specified and as directed .

Supplying and fixing in replacement of Potential Transformers oil cooled outdoor type ,11 kV single phase having ratio 11kV / rt3 / 110 / rt3 /110 / rt3 and HSV 12kV , complete all as specified and as directed .

Supplying and fixing in replacement of Current Transformers oil cooled outdoor type ,11 kV single phase having ratio 100/5 and HSV 12kV , complete all as specified and as directed .

Material and labour for preparation of existing dull painting of VCB/SF6/RMU indoor/ outdoor type and applying two coats of synthetic enameled paint (Heat resistant type) according to IS colour code by spray machine including writing MES/SM No in capital letters of suitable size on body for capacity 11 KV 400/630/800 Amps outdoor/indoor complete all as specified and directed .

Material and labour for HT cable route marker / HT joint marker made out of Jodhpur stone of size 250 mm width x 150 mm depth x 900mm height size with top oval shaped, engraved with 'HT cable' duly painted with approved colour with writing letter for both side complete all as specified and directed by Engineer- in- Charge. Note: - (i) The work shall be carried out in Technical area for HT cable. (ii) Route Marker shall be buried in ground upto a depth of 45cm below the natural Ground Level (iii) Rate quoted shall include the cost of necessary excavation and earth work.

M/s Rohit Construction Co. (BID ID -3134225)

B.K. ROY & SONS (BID ID -3133484)

BEYLIM INFRA (BID ID -3141263)