SPECIAL REPAIR TO CERTAIN HT SWITCHGEAR SYSTEM INCLUDING REPLACEMENT OF BER OCBS AND CONNECTED ITEMS AT WELLINGTON STN UNDER GE WELLINGTON

Amount

Supply, installation, testing & commissioning of HT 11 KV, 800A, VCB panel outdoor type (1 incomer + 04 Nos outgoings) made of Aluminum Zinc/CRCA sheet or pre-galvanized sheets dust and vermin proof , locking arrangement, duly powder coated, totally enclosed, free standing floor mounting type, compartment based with truck mounted or cassette mounted vacuum circuit breaker spring operated electrically and manually charged operating mechanism suitable for horizontal isolation, horizontal draw out type VCBs with 1200 Amps rated copper bus bars, back entry type complete VCB panel confirming to IEC 62271-200 standards, and IP 65 or higher class of protection comprising necessary bus-bars extension and connections and following protective and control devices as specified below. The switchgear and control gear panels shall be of fully arc proof LSC 2B, PM, IACAFLR for 26.3 kA for 1 Sec. Comprising of the following all as specified (to be provided in incomer and all 04 Nos outgoings). Note: Outdoor panel enclosure shall be made and installed through authorised system integrator of OEM only.

A. PANEL: Panel should be comprising trolly mounted or casette mounted horizontally isolated, horizontally draw out type VCB 11 KV, 400 Amps capacity 250 MVA completely enclosed with provision of mechanical locking and having 3 Nos vaccum interrupters of ratings 11 KV, 400 Amps, 250 MVA capacity mounted on common phase segregated epoxy body for higher elect insulation and to maintain pole discrepancy as per IEC 56 and self alligned type isolating contacts, manual and motor operating (230 volt AC spring charged mechanism, manual closing and tripping push buttons, emergency trip push button, mechanical indication for circuit breaker close/open, mechanical operation counter, 08 No +08 NC breaker operating auxillary switch, spring charged/discharged indication, circuit breaker service/test position indication etc and with the following accessories :- (i) Floor mounted panel fabricated with 3 mm thick CRCA sheet duly powder coated with self contained air insulated compartments for bus bars and cable boxes with necessary supports. (ii) Fixed spout insulators with effectively covered by safety shutters automatically open/close while draw in/draw out operations. (iii) 3 Phase epoxy base isolating spout assemblies complete with isolating contacts and a pair of automatic safety shutter individually locking system in closed position for earthing/maintenance purpose. (iv) An epoxy interupter per phase all as per manufacturers design. (v) The breaker with self contained motor charging asembly includes 230 V AC motor and control switches. Also should have standard safety interlocks and locking facilities. A mechanical operating connector lever and extendable rails to easily draw out/in the VCB trolly from the panels is also to be provided.

(B) BATTERY BANK WITH CHARGER FOR AUXILLARY SUPPLY - 01 SET Battery bank 24 volt 180AH consisting of 02 Nos, 12 volts cells, maint free lead acid alongwith Racks & connections with suitable rating copper bus bar covered with PVC sheet and suitabale rating of float cum boost battery charger of rating 230 volt AC i/p, protection for i/p & o/p. 25 RM of 2 core, 10 sqmm, copper conductor un-armured cable with crocodile clamps/lugs on ends from LT Panel to charger for 230 volts AC Supply and battery charger to VCB panel. (Make of Battery and Charger : Exide/Amararaja/HBLNIFE/TATA (C) ALARM SYSTEM : Common alarm with reset system to be provided on panel board for circuit breakers trip, DC auxilary supply failure and AC auxilary supply failure. (D) 230 VOLT AC AUXILLARY SUPPLY : 2 Core, 10 sqmm, copper conductor, un-armoured cable from LT panel/DB to VCB panel board 25 RM (Approx) (E) RUBBER MATTING : (a) Rubber matting nibbed pattern suitable for 11 KV grade as per IS of size 2 m x 1m x 20mm thick - 02 Nos (F) Supply and fixing/ Connecting 11 KV Singel phase, Resin cast dry type PT of ratio 11KV/rt3/110V/rt3 class 0.5-3, Burden 100VA insulation level 28KV/75KV voltage factor 1.2 Cont and 1.9 for 30 sec,confirming to IS-3156 - 3 Nos to be installed in incomer VCB panel.

Material and labour for testing of HT VCB Relays, OC/EF setting for Following 06 no of feeders and replacing Digital Ammeter & Voltmeter of 1 No VCB including replacement of 6 window Alarm Annunciator for 2 No of feeder VCB with Door cutout & control wiring, supply of 24v DC supply 12 way DB Incomer : 25A DP MCB - 1 No,Outgoing : 10A DP MCB - 5 Nos and Supply and laying of 2c x 2.5sqmm cu.Ar. Cable from DC DB to VCBs including labour Charges for Fixing of DC DB laying of 2c x 2.5sqmm Cable end termination and checking of DC supply and control VCB all as specified and as directed.

Excavation in trenches not exceeding 1.5m wide and not exceeding 1.5m in depth for taking out/ laying of UG Cables, GI Pipe etc and getting out in hard/ dense soil complete all as specified and as directed.

All as per item No 3.00 described here-in-before but depth exceeding 1.50m and not exceeding 3.00m.

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

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

Supply and spreading in natural riddled soil as earth cushioning to cable by using IS sieve to separate the composite particle/roots etc amd refilling in trenches and compacted in layers to form a solid bed covering to cable all as specified and as directed. Note: Riddled soil earth shall be approved by GE in writing before incorporation in work.

Supply and laying un-reinforced precast concrete cable cover, class HVP, Type 1, flat, size 300 x 180 x 40mm in trenches for protection of UG Cable with width equal to length of PCC cover, laid dry & flat complete all as specified and as directed.

Material and labour for providing plain cement concrete 1:4:8, type D-2, using 40mm graded stone aggregate as in foundations, filling and mass concrete including necessary form work etc complete all as specified and as directed.

Material and labour for plain cement concret 1:3:6, type C-2 with using 40mm grade stone aggregate as in foundation of steel tubular poles and stay with necessary form work as required complete all as specified and as directed.

Material and labour for plain cement concret 1:2:4, type B-1 with using 20mm grade stone aggregate as in coping of steel tubular poles with necessary form work as required complete all as specified and directed.

Dismantling of unserviceable/ broken electric pole of any size and type with disconnecting all connections, demolition of concerted foundation including excavation earth work as required and removing the same from site complete all as specified and as directed.

Supply and erection of steel tubular swaged poles 11 meter long, type 410 SP-55 in true vertical position complete with cast iron base plate, final taper plug, bolts, nuts and screws pole cap etc conforming to IS-2713(Part-1 to 3)1980 including painting two coats of black bituminous paint throughout internally, and externally up to the planting depth and the remaining portion of the exterior shall be painted with two coats of aluminum paint over a coat of red oxide primer after necessary preparation of surfaces complete all as specified and directed.

Material and labour for Cable termination 11 KV HT (Cold Shrinkable) cable jointing kit for 11 KV (Earthed) grade cable for outdoor termination cold shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 95 Sq mm complete all as specified and as directed.

Material and labour for disconnecting of HT cables from the existing OCB and VCBs, removing the existing HT cables carefully from HT panel room to HT Yard, and reconnecting of HT cables, realignment of HT Bus bar and synchronizing with existing sytem including removing of HT OCB from panel room and move to MES store yard etc complete all as specified and as directed.

Supply, laying, jointing & testing XLPE Insulated, Screened, PVC Bedded, Galvanized steel strip or wire armoured, Electric Power Cables (heavy duty) with stranded aluminium conductor, 6.35/11 KV, (Earthed) of size 95 sqmm 3 Core laid in trenches/ through GI Pipe/ fixed along with pole structure etc including taking out old unserviceable cable of any size complete all as specified and as directed. NOTE : Necessary earthwork, PCC etc. shall be measured & paid separately under relevant item(s) of BOQ.

Supply and fix Pin type, porcelain vitreous brown insulator including one galvanised mild steel spindle, two galvanised iron washers and one galvanised iron nut, 150 mm height, 150 mm dia suitable for 11000 volts grade including taking out existing etc complete all as specified and as directed.

Supply and fix 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 and including taking down, all fixing arrangement on four pole/Two pole structure and painted with two coats of synthetic enamel paint over a coat of red oxide primer complete all as specified and directed.

Material and labour for Earthing complete with Galvanised steel earth plate electrode 600 x 600 x 6 mm thick buried directly in ground (in vertical position) earth pit not less than 2.25 mtr below normal ground level with the top edge of the earth plate not less than 1.5 m below ground level and connected to GI earth strip 25 x 4mm by means of bolts, nuts, check nuts, and washers of galvanized iron including PCC pit & cover with suitable handle, including necessary excavation and earth work in any type of soil, 20 mm dia med grade galvanized steel tube for watering with one end fixed with suitable funnel and wire mesh, 40 mm bore medium grade galvanized steel tubing for drawing earth lead GI strip protection & common salt, charcoal in alternate layers etc. complete all as shown in EP No 3 of SSR Part 1 and testing on completion complete all as specified and as directed.

NOTES: On completion of the work/job the Contractor is to perform earth resistance tests for each earthing job in the presence of the Engineer-In-Charge or his rep & submit test certificates duly signed & certified. If the test results are not satisfactory or not within the permissible limits of relevant Standards/IS then the job is to be redone without any extra cost to the Department till the results are satisfactory.

Supply and fix in replacement of Cable jointing kit for 11 KV (Earthed) grade cable for straight through, outdoor/ indoor type cold shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 50 to 95 sqmm complete all as specified and as directed.

SUPER COOL (BID ID -3183613)