REPAIR/MAINT OF HT INSTALLATIONS, HT VCB, HT CABLES AND DISTRIBUTION TRANSFORMER AT LEBONG UNDER AGE (I) DARJEELING

Amount

Excavation in trenches not exceeting 1.5 Mtr wide and not Exceding 1.5 Mtr in depth and getting out in soft/loose soil for laying cables all as directed .

Excavation in trenches not exceeding 1.5 mtr wide and exceeding 1.5 mtr but n.exc 3.0 mtr in depth and getting out in any type of soil for taking up or laying of cable, foundation of poles, stay etc complete all as specified & directed. Note : Due care shall be taken while deciding cable route for excavation. However any damage to Signal, BSNL, MES cable water/sewage pipe or any other service while excavation will be made good by the contractor and cost of the same for jointing material & labour is deemed to be included in the cost of excavation.

Returning, filling in including spreading, levelling, watering and ramming in layers not exc. 25 cms.

Removing excavated material not exceeding 50 Mtr and depositing where directed at a level not exceeding 1.5 mtr above the starting point all as directed.

S&F Steel tubular swaged poles complete with cast iron base plate, finial taper plug, bolts, nuts and screws as specified type 410 SP-55, 11 mtr long including one coat of red oxide primer and two of aluminium paint all as specified & directed.

M&L for sand cushioning for protection of PVC cable with approved sand of uniform thickness, laid dry, by filling in trenches and punning to proper required cover all as directed.

Supply and fix precast concrete cable covers class HVP type 1, flat size 300 x 180 x 40 mm grade concrete for cable protection after taking out the old damaged cover all as directed and specified by Engr-in-charge.

Supply andLaying only GI pipe 80mm dia medium grade of following sizes for cable protection laid in trenches/structures/walls including necessary MC clamps, Bolts, nuts, fastners etc after taking out the rusted pipes from the trenches.

M&L for cutting existing road/hard standing not exc 20x30 cm in wide & depth getting out excavated material for laying cable/GI tube, returning filling & well ramming watering finish suraface 10 cm from top using PCC 1:3:6; including removal of surplase soil

M & L for dismantling ACSR conductors and deposited to MES store yard for reuse.

M & L for dismantling Earth wire or copper conductor, service feeder or distributor span.

M & L for dismantling & taking down insulators any type and size

M & L for dismantling & taking down cross arms or MS channel or angle section etc complete and diposited to MES store yard for reuse.

Supply, Laying & testing cable XLPE insulated screened PVC beded, galvanised steel strip or wire armoured, electric power cables (heavy duty) with stranded aluminium conductor, 11000 volts grade, of size 3 core 95 Sqmm

Supply and fix cable end joint kit heat shrinkable outdoor suitable for 11KV 3 core 50/70/95 Sqmm HT XLPE armoured UG cable after cutting out the faulty joint.

M & L for pin type, grey polymer insulator including one galvanised mild steel spindle, two galvanised iron washers and one galvanised iron nut suitable for 11000 volts grade.

M&L 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 aluminium paint complete all as specified and as directed.

Material and labour for PCC 1:3:6 type C2 using 40 mm graded stone aggregate for poles/stay assembly foundation and mass concrete including necessary form work.

M&L for construction of PCC 1:2:4 type-B-2 using 40mm graded stone agragate as in copping incl necessary form work and fair finishing without using extra cement complete all as specified.

Material and labour in repair for mechanically gang operated air break switch 11KV mounted on 12 nos. insulator and steel frame with operating mechanism worked from ground level complete with drop out fuse (set of three) of rating 400 amps.

Servicing / calibration / trouble shooting / repairing / adjustment of over current relay, earth fault relay, Spring, spring charge mechanism, close coil, trip coil, including connected accessories cleaning of all contacts with CTC, of the 11KV HT VCB panel of 630A, 50 Hz by qulified technical personel to make functional in all respects including identifying the deffective parts.

Supply only following spares in repairs suitable for 11KV HT VCB of maximum short circuit current rating 25/26.3 KA 630A/400A after taking down the old spares-

a) LED indicating lamps R/Y/B

b) LED indicating lamps amber

c) LED indicating lamps white

d) Trip circuit push button with NO contracts.

e) Limit switch

f) Tripping coil assembly

g) Closing coil assembly

h) space heater

j) Thermostat

k) HRC control fuse 2A, 4A, 6A 10A

l) Fuse Holder with base

m) breaker control Switch

n) Single phase power pack with capacitor backup, 110V DC

0) Spring Charging motor coil

M & L for disc type insulator, porcelain, vitreous 145mm high and 255mm dia ball and socket type, white, brown or green two-in-series assembly for tension with tension clamps for conductors, working pressure 11000 volts

Supply and fix stay assembly using GI stay rod 16 mm dia complete with stay plate mild steel of size 300x300x6.00mm thick, stay bow complete all as specified and shown in Electrical Plate No 1 . (loop type insulator, stay clamps, excavation and concrete measured separately) complete all as specified and directed.

Supply and fixing loop type insulator large size porcelain vitreous of size 90 x 140 mm clearence of hole 25.5mm complete all as specified and directed.

Earthing complete with galvanized steel earth plate electrode 600x600x6 mm thick buried directly in ground (earth pit not less than 2.25 m deep below normal ground level) with top edge of the plate not less than 1.5 m below normal ground level connected to galvanized earth strip 32 x 6 mm (up to 7.5 m in length from earth plate ) by means of bolts and nuts checknuts and washers of galvanized iron or steel all as specified and shown in electrical plate no 3 of SSR part I including necessary excavation and earth work in any type of soil PCC 1:3:6 type C1 chamber with RCC 1:2:4 type B1 40 mm thick cover with MS rod 8mm dia 150mm long reinforcement, watering funnel, 40 mm dia light grade for protection of earth electrode 20 mm dia for watering all as specified and directed and tested on completion.

Disconnecting and removing transformer from mounting platform after disconnecting HT/LT side cable connections and transporting of unserviceable transformer for rewinding from MES sub station to contractors/civil workshop and vice versa by arrangement of necessary crane for taking down loading / unloading and refixing at site of following capacity :-

(a) 50 KVA to 100 KVA

(b) 150 KVA to 200 KVA

Rewinding of transformer of under mentioned capacities by super enameled copper wire as per existing guage of primary coil with `E’ class insulation, varnishing and heating the coil properly, fixing on core and making connection to achieve rated voltage and current all as specified and directed by Engr-in-Charge.

Rewinding of transformer of under mentioned capacities by super enameled copper wire as per existing guage of secondary coil with `E’ class insulation, varnishing and heating the coil properly, fixing on core and making connection to achieve rated voltage and current all as specified and directed by Engr-in-Charge:-

Supply only brass spindle for terminal on HT side threaded complete with nut, washers etc of suitable dia for transformer of following capacity :-

(a) 63 KVA to 100 KVA

(b) 150 KVA to 250 KVA

(c) 300 KVA to 400 KVA

All as per item No 50 here-in-before but for LT side of transformer of following capacity :-

(a) 50 KVA to 100KVA

(b) 150 KVA to 250 KVA

(c) 300 KVA to 400 KVA

Supply only ceramic bushing on LT side of transformer of following capacities.

All as per item No 58 here-in-before but for HT side of transformer of following capacity :-

Dehydration/filtration of transformer oil by means of centrifugal filtration plant to achieve the specified dielectric strength of 35 to 40 KV at 2 mm gap in existing possession of transformer of any capacity and transformer oil for topping up at various sub-station all as directed by Engr-in-Charge.

Supply and filling Transformer oil upto top up

Material and labour for spreading and leveling of unbroken river stone aggregate for loose filling of gauge 40mm to 80mm graded complete all as directed by Engr-in-Charge

Note 1:- (Applicable for all parts/items) : The biidders/contractors are advised to read tender document, all drawings & all corrigendum/ amendments and general condition of contracts before entry/quoting the rates. Note 2:- Attention to bidder is hereby invited to upload revised BOQ if published during their bid submission. Uploading of incorrect/ pre-revised BOQ shall be treated as non bonafide and rejected.

SANJAY KAUSHIK

Darjeeling Enterprises