REPAIR AND MAINTENANCE OF ELECTRICAL BREAKDOWN INCLUDING FAULT DETECTION LOCALIZATION AND RECTIFICATION IN HT/LT UNDERGROUND NETWORK AND OH CONDUCTOR REPLACEMENT TO 11 KV HT CABLE AT CARIAPPA VIHAR, 105 TA, 1 WEC, EETSU, DAS, POLO GROUND TODAPUR, KAN

Amount

Excavation in trenches not exc. 1.5 m wide and not exc 1.5 mtr deep in soft/loose soil including taking up old bricks & PCC concrete covers for laying / taking up/ taking down of cables and getting out and levelling of bottom surface to required level all as specified and directed by Engineer- in- Charge.

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

Removing excavated material (i.e. 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 all as specified and directed by Engineer-in-Charge.

Material and labour for river washed and screened, dry sand for filling in trenches below and around underground cables for cushioning of cables etc, complete all as specified. Note : Measurement shall be taken after punning down.

Material and labour for sub class B bricks of size ___ having minimum compressive strength 75 Kg/ Sqcm laid in trenches for cable protection etc complete all as directed by Engineer-in-Charge.

All as per srl item No 5 here-in-before but using old bricks obtained under srl item No1 here in before.

Supplying and laying un-reinforced precast concrete cable cover, class HV, type 1, flat size 300mmx 180mm x 40mm complete all as specified and directed.

All as per srl item No 7 here-in-before but using old un-reinforced precast concrete cable cover obtained under srl item No 1

Supply, laying, jointing, testing and commissioning in replacement LT underground cables 1100 volts grade, PVC insulated XLPE and PVC sheathed, heavy duty armoured, with multistranded aluminium conductors, IS-1554 marked, laid in trenches complete all as specified and directed. Cables of the following sizes:- Note: Excavation, earth work ,cable protection , sand fillings , cable joint shall be measured and paid separately.

16 Sqmm 4 core

25 Sqmm 4 core

35 Sq mm 3.5 core.

50 Sq mm 3.5 core.

70 Sqmm 3.5 core

95 Sqmm 3.5 core

120 Sqmm 3.5 core

185 Sqmm 3.5 core

240 Sqmm 3.5 core

300 Sqmm 3.5 core

Supplying, laying, jointing testing and connecting in replacement XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cable (heavy duty) with multistranded aluminum conductors, 11 KV grade, IS 7098 marked, suitable for HT 11 KV(E) system, laid in trenches fixed to pole, including jointing & testing complete all as specified and directed of following sizes Note : Excavation, earth work ,cable protection , sand fillings , cable joint shall be measured and paid separately.

95 sqmm 3 core.

120 sqmm 3 core.

185 sqmm 3 core

240 sqmm 3 core

300 sqmm 3 core

Testing the cables with high voltage DC testing machine and locating the fault in the cables by fault locating machine to pin point exact position of fault, disconnecting faulty 11 KV HT cables of different sizes from both ends, removal of Fault, Re-connections and testing of cables after removal of fault complete all as specified and directed. Note: (a) 11 KV HT cable & joints shall be measured and paid for separately under respective items of schedule. (b) Retrieved old serviceable cable cover/bricks will be laid in trenches for cable protection. If extra PCC cover/bricks and sand required at site shall be measured and paid separately under respective items of BOQs. (c) Excavation and earth work will be measured and paid for separately under respective items of schedule.

All as per item Ser No 11above but 1100 Volt LT cables

Taking out faulty underground 1100 Volt LT cable of different sizes by excavation and removing bricks of any size and relaying in the same trenches or re-routing after rectification of fault or replacing faulty portion of cable with new cable and removing of surplus soil and using new bricks as required. Note: (a) 1100 Volt LT cable & joints shall be measured and paid for separately under respective items of schedule. (b) Retrieved old serviceable bricks will be laid in trenches for cable protection. If extra bricks and sand required at site shall be measured and paid separately under respective items of BOQs. (c) Excavation and earth work will be measured and paid for separately under respective items of schedule.

All as per item Ser No 13 above but 11000 Volt HT cables.

Material and labour disconnecting faulty /burnt end or portion of cable by removing the cable from loop including necessary excavation & earth work , suitable size of thimble LT tap , relaying and reconnecting the cable by removing faulty/burnt portion of cable and preparing fresh terminals for 25 Sqmm 3.5/4 core to 240 Sqmm 3.5 core of LT cable to LT Panel/pole/main switch complete all as directed.

Supply, fixing and testing LT straight through joint heat shrinkable type with jointing kit suitable for cable PVC/XLPE insulated armoured heavy duty aluminium conductor 1100 Volts grade complete all as directed for the following sizes :-

16 Sqmm to 50 Sqmm x 3.5 core/ 4 core

70-150 Sqmm x 3.5 core

185 -300 Sqmm x 3.5 core

Supply and fixing Cable jointing kit for 11 KV (Earthed) grade cable for indoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of following size :-

95 Sqmm 3 core.

120 Sqmm to 185 Sqmm, 3 core.

240 Sqmm to 300 Sqmm 3 core

Supply and fixing Cable jointing kit for 11 KV (Earthed) grade cable for outdoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of following size :-

95 Sqmm 3 core.

120 Sqmm to 185 Sqmm, 3 core.

240 Sqmm to 300 Sqmm, 3 core.

Supply and fixing Cable jointing kit for 11 KV (Earthed) grade cable for straight through heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of following size :-

95 Sqmm 3 core.

120 Sqmm to 185 Sqmm, 3 core.

240 Sqmm to 300 Sqmm 3 core

Boring of hole under road/pavement/hard standing or any other situation upto depth of 90 cm below ground level by manual means and suitable for passing of GI pipe 40 to 100 mm bore and making good both ends all specified and directed

Supply and laying GI pipe light grade in replacement as cable protection laid on trench/floor, fixed on pole/wall etc alongwith accessories for saddling and clamping of following sizes all as specified :-

100 mm dia

80 mm dia

50 mm dia

40 mm dia

Supply and laying as replacement in sub station fixing 3.3 KV to 11 KV insulating mat of size 5mtr x 1 mtr x 2.5 mm thick specification as per IS-15652 2006 complete all as specified and directed.

Supply installation & commissioning in replacement of 24V/40A Float Cum Boost Battery Charger unit including battery bank comprising 02 Nos of 12 Volts-100 AH sealed maintenance free battery. The CCCV battery charger consisting of copper wound, air cooled transformer, 01 Set single phase full wave bridge rectifier consisting of diodes and SCRs, liberally rated mounted on heat sink and complete with resistor/condenser network for surge supression . During auto float mode automatic changeover shall take place from float mode to boost mode and vice versa, 01 Set of solid state constant potential controller to stabilize the DC output voltage of the float cum boost charger, 01 No electronic controller , DC digital ammeter , DC digital voltmeter, Potentiometer , DC, MCB for reverse battery protection . The charger should have alarm annunciation with visual and audible alarm with manual reset facility for fuse fail alarm. Float cum boost battery charger and DC distribution board shall be housed in powder coated sheet steel cubicle with panels of 1.6mm thickness , louvers for ventilation , gland plate will be provided for cable entry from bottom . The battery charger shall be divided into two compartments. The upper compartment shall house the battery charger & DCDB with all necessary controls. The lower compartment shall be suitable for housing the batteries. Tech specification shall be as under:-

(a) Input working voltage-180 -270 Volts (b) Nominal Input Voltage - 230 V , AC , 50 Hz,1 (c) On load input power factor - > 0.8 (d) On load unit watt efficiencies-> 80% (e) No load losses of complete charge-< 10% (f) Ripple contents on the load (RMS)= 1% to 5% (g) Over load - 110% for 30 minutes and will give visual indication for over load condition. (h) Boost charging - 2.4 V/Cell . (j) Float charging -2.15 V/Cell (k) Float cum boost charging-Automatically changes from one state to another state as per battery condition and will give the visual indication for either float or boost based on charging mode. (l) Reverse polarity -No damage will caused . A visual indication for reverse polarity will appear with an audio alarm. (m) Short circuit-MCB protection provided.

Earthing in replacement complete with galvanized steel earth plate electrode of size 60cmx60cmx6 mm thick, buried directly in ground (earth pit not less than 2.10 m below normal ground level) with top edge of earth plate not less than 1.5m below normal ground level, connected to galvanized iron strip 32x6mm by means of bolts, nuts, check nuts and washers 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 nuts and washers of galvanised iron 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 medium grade etc. (b) The quoted rates shall also deemed to include the cost of earth test point and earth strip/GI lead wire and protection pipe upto 7.5 meter beyond the earth plates electrode.

Supply & fixing in replacement MCCB 4 pole, 100 Amp, 16 kA, 415 Volt AC, 50 Hz with MCCB Sheet metal encloser mounted on wall with fastener and suitable size of nut and volts after taking down old existing UNSC MCCB/SFU Complete all as specified and directed.

Supply & fixing in replacement MCCB 4 pole, 160 Amp, 16 kA, 415 Volt AC, 50 Hz with MCCB Sheet metal encloser mounted on wall with fastener and suitable size of nut and volts after taking down old existing UNSC MCCB/SFU Complete all as specified and directed.

Material & labour Brick work with sub-class 'B' bricks, straight or curved on plan exc 6 m mean radius, built in cement mortar 1:6 complete as specified and directed.

Material & labour Rendering 15mm thick on fair faces of brick work or concrete surfaces in cement mortar (1:4) finished fair and even without using extra cement complete as specified and directed.

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

Material & labour for cement concrete type B-2, 1:2:4, 75 mm thick (using 40 mm gradded aggregate) for floors and paving etc complete all as specified and directed.

Supply & fixing Cross arms, bracings, supports, clamps and back plates fabricated from structural steel sections including nuts, bolts, washers,welding, bending cold or hot, drilling holes for bolts, in any shape or size as indicated or directed and inclusive of one primer coat, one under coat and one finishing coat of paint.

Dismantling of fencing wire mesh of any type and supply & fixing 3.15 mm thick mild steel wire 75x75 mm mesh up into mattresses or cages, lapped wired and fixed in position including welded for fencing to grid complete all as specified and directed.

Material & labour for 2 coat of synthetic enamel painting over a coat of red oxide to steel surfaces including preparation of newly surface complete all as specified.

Material & labour in replacement for Retro Reflective installation sign board of size 12 Feet x 4 Feet using 3 mm ACP sheet duly riveted / fixed on fabricated stainless steel 304 grade finished hollow section of size 25mm x 50mm with supporting ss strips in base at a height of 7.5 meter above ground level on stainless steel 304 grade pipe of size 80mm embedded 90 CM in PCC 1:2:4 type B 1 block of size 45cmx45cmx90cm including necessary excavation and earth work . The board shall be machine printed and the front of the ACP shall be overall sheathed with blue colour base adhesive tape. The writing matter shall be in English language on both side using reflective adhesive Painter tapes as directed. The size and letters and matter to be printed shall be finalized by Engr-in-Charge.

Material and labour for spreading of stone aggregate of nominal size not more than 25mm under 4/6 pole HT structure /surrounding area of outdoor RMU manually without damaging any equipments, cable or parts , spreading & levelling of finished gravel uniformly in layers n. exc. 15 cm thick watered and rammed to true surface all as specified and directed

Supply installation & commissioning in replacement of 12 Volts-100 AH sealed maintenance free battery suitable for solar street light complete all as specified and directed by Engr-in-charge.

Material & labour in replacement for Retro Reflective installation sign board of size 5 Feet x 4 Feet using 3 mm ACP sheet duly riveted / fixed on fabricated stainless steel 304 grade finished hollow section of size 25mm x 25mm with supporting ss strips in base at a height of 2 meter above ground level on stainless steel 304 grade pipe of size 50 mm embedded 75 CM in PCC 1:2:4 type B 1 block of size 45cmx45cmx75cm including necessary excavation and earth work . The board shall be machine printed and the front of the ACP shall be overall sheathed with blue colour base adhesive tape. The writing matter shall be in English language on both side using reflective adhesive Painter tapes as directed. The size and letters and matter to be printed shall be finalized by Engr-in-Charge

Supply, installing, testing and commissioning in replacement of factory made and tested HT Panel board, size: 1200 mm x 1200 mm x 900 mm ,cubical compartmentalized , out door type double door, suitable for 11000 Volts, 3 phase, 50 HZ AC supply system having bus bar chamber with insulated aluminium bus bars of size ,50 mm x 10 mm, 3 Nos installed on SMC insulators suitable for 11000 Volts .The panel shall be dust and vermin proof. IP-65 class protection and shall be made of 3.15 mm CRCA MS sheet, and 50x 50 x 6mm thick MS angle iron frame work, powder coated front and rear opening type, with apron for cable entry closing locking . The fixing of double doors shall be on MS hinges with anti-theft provision (the door can’t be removed from enclosure without cutting enclosure). including excavation, earth work and platform for the panel with PCC 1:4:8 type D-2 with 40 mm graded crushed stone, 15 cm thick in foundation, brick work in CM 1:6 with sub class 'B', old size bricks, rendering 15 mm thick in CM 1:6 on exposed surfaces and 100 mm thick PCC padding 1:3:6, type C-1 using 20 mm graded crushed stone aggregate on top and grouting bolts etc for panel. The platform shall be such that it is of a height 45 cm above the nearest road level complete all as specified and directed by Engr-in-charge.

Material & labour for construction of brick masonry platform for Transformer of size 3.0m x 3.0m and total height 1.40 m (0.40 M below ground level and 1.0M above ground level including excavation and earth work ) with brick construction in wall and steps, using TMT bars 10mm thick to the distance of 0.15 mtr on the platform from both sides, PCC 1:3:6 type C-2 in foundation, brick work in CM 1:4, 15mm thick rendering in CM 1:4 on fair face of walls and steps, 100mm thick PCC 1:2:4 type B-2 (using 40mm graded crushed stone aggregate) in floor and paving, 40mm thick PCC on steps, and MS channels of size 3 mtr (02 Nos) beneath the TMT bar on the platform for better support with painting to foundation and steps complete all as specified and directed by Engr-in-charge.

Disconnecting electrically (and mechanically, ) outdoor transformers upto 500 KVA capacity, lowering down from 4/6 pole structure carefully and Re-installation of transformer on plinth , connecting electrically and mechanically, testing and commissioning complete all as specified and directed.( rate is deemed to be inclusive of , T&P hydra and man power ) complete all as specified and directed.

M/s JAIMAA ASSOCIATES

MV Engineers And Contractors

mayur enterprises

DS CONSTRUCTION

Ridhi engineers and builders