CA NO CWE/CHD-57/2020-21 SPL REPAIR FOR REPLACEMENT OF BER/VINTAGE TRANSFORMER ALONGWITH CONNECTED ITEMS AND AUGMENTATION OF EXTERNAL ELECTRIC SUPPLY AT N AREA AND HALLOMAJRA UNDER GE CHANDIGARH

Amount

Excavation in trenches in soft & loose soil not exceeding 1.5 metre deep and not exceeding 1.5 mtr width and getting out soil including forming bottom surface to required slope/gradient for laying cables/pipes etc. all as specified and directed by Engineer-in-Charge. Note : (i) Excavation shall be made carefully in order to avoid damage of existing cables and protection covers.(ii) The excavation work may be carried out in short lengths for locating fault in under ground cables at different locations.

Returning, filling in (soils) including spreading, leveling, watering and well ramming in layers of 25 cm thick after the cables etc. are laid, jointed and tested complete all as specified and directed.

Removal of surplus excavated spoil (Soils) not exceeding 50 Mtr distance and depositing where directed by Engineer-in-Charge at a level not exceeding 1.5 m above the starting point complete all as specified and directed.

Material & labour for sand filling with clean dry find sand unwashed including gently punning around cables in trenches/ducts for cable protection complete all as specified and directed.

Supplying & Laying (laid flat, width of protection being equal to length of cover) un-reinforced pre cast flat concrete cable protection cover of class HV, type- I, size 300mm x 180mm x 40mm, factory made (ISI Marked) approved by GE complete all as specified and directed.

Supply and laying of class B bricks for under ground cable protection (laid flat, width of protection being equal to length of brick) complete all as specified and directed.

Taking out old unsv HT UG cable of any size complete all as specified and directed.

Dismantling concrete poles/ struts, any size complete all as specified and directed.

Taking out carefully with out damaging transformers of capacity 50 KVA to 160 KVA carefully from two pole /four structure and depositing in MES store yard complete all as specified and directed.

Dismantling cross-arms of M.S. channel or angle sections etc. complete all as specified and directed.

Dismantling air break gang operated switches vertical/horizontal mounted including insulators and operating mechanism complete all as specified and directed.

Taking down old unsv conductors any type any description complete all as specified and directed.

Dismantling GI earth continuity wire or cradle guard from service feeder or distributor span complete all as specified and directed.

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

Dismantling stay assembly complete complete all as specified and directed.

M&L Cradles, hexagonal/rectangular, fabricated with galvanised steel wire 3.15 or 4mm dia complete all as specified and directed.

Supply , installation , testing and commissiong of transformer step down 11 KV/433 volts of capacity 100 KVA , outdoor type (pole mounted) non sealed type copper wound, oil immersed (with first fill of new transfrmer oil complying to IS-335) , complete and other standard fittings ,with off load tappings on HT side to vary secondary voltage within limit (+5% to -10% in steps of 2.5 %), with vector group Dyn-11 with HV side bushing and LV side cable box with cable gland of required size as per cable size . Transformers conforming to Energy Efficiency Level III rating as per IS -1180:2014 amended in Dec 2016.

(a) Transformer shall conform to the following specifications :- (i) System Voltage - 12 KV (ii) Rated Voltage - HV -11 KV, LV - 433 volt (iii) Frequency - 50 HZ (plus/minus - 5%) (iv) Nos of Phases - 03 (v) Connections - HV- Delta, LV - Star (Neutral brought out) (vi) Vector Group - Dyn- 11 (vii) Cooling - ONAN (viii) Audible noise - Below 50 decible (ix) Permissible temperature rise over maximum ambient as per (ix ) For top oil measured by thermometer - 35 degree C and for winding measured by resistance - 40 degree C. (x) Over fluxing limit - Flux density with +12.5% combined voltage and frequency variation from rated voltage and frequency shall not exceed 1.9 Tesla(b). (xi) Rated basic insulation level - 75 KVp

(b) Transformer shall be oil immerse, naturally self cooled copper wound, winding core type, MS radiator cooled tank complete with first fill of transformer oil plus 5 % spare oil as per IS 335 of 1980.Transformer shall be painted with two coats of epoxy paint as per IS-632. (c) The following standard accessories shall also be provided:- (i) Rating and diagram plate. (ii) Earthing terminals 2 Nos (iii) Lifting lugs (iv) Thermometer pocket (v) Air release hole with plug (vi) Tap changer with locking provision (vii) Oil Temperature indicator (viii) MS terminal box both on LT side. (ix) Dehydrating breather. (x) Filter valve 20 mm nominal size. (xi) Arching horn for HT side bushing. (xii) Bird Guard.

All as per item Ser No 17 here-in-before but transformer of cap 200 KVA (platform mounted) with off load tappings on HT side to vary secondary voltage within limit (+5% to -10% in steps of 2.5 %), Transformers conforming to Energy Efficiency Level III rating as per IS -1180:2014 amended in Dec 2016.

All as per item No 18 here-in-before but transformer of capacity 250 KVA. Note for Item Serial No 17 &19 : - (i) Pre despatch inspection of transformers shall be caried out by rep of accepting officer at manufacturer premises with overall cost quoted by the contractor. Nothing extra shall be payable on this account at later stage. (ii) After installation of the transformer the same shall be tested and commissioned by SEI and al the equipment/instruments required for testing shall be arranged by contractor. Cost of the same shall also be deemed to be included in the item rates quoted by the contractor.

Supply and fix in repair Lightning arrestor single pole zinc oxide (Gap less) surge type suitable for use in effectively earthed system with nominal voltage 12 KV and shall comply with IS : 3070 (Part -3) 1993 complete all as specified and directed.

Design, Engineering, Manufacture, assembly, Stage testing, inspection and testing before supply and delivery at site, Installation, testing & Commissioning of 12 KV Ring Main unit, outdoor type Extensible, with IP 54 standard protection fully type tested according to IEC-62271 standards ,insulated with SF-6 gas ,Configuration- 4- way- 11KV Gas (SF6) Insulated RMU with two nos 630A motorised operated Load break switches and two nos VCB, 630 Amps "T" OFF circuit breaker complete with TPN copper bus bar of 630 amps rating insulated with epoxy resin, microprocessor based over current and earth fault self powered relay (Make : ASHIDA/C&S/MICOM) , 11 KV CT of ration 50/1/1- 03 nos in each VCB for metering and protection with 5 VA burden with accuracy class 0.1 and PT of ratio 11KV/√3/110V/√3. Burden : 10 VA accuracy class 0.2-03 Nos, mechanical and electrical interlocking feature, metering instruments digital type ( volt meter 0-20 KV , ammeter 0-100 Amps with following specifications.

(a) SYSTEM PARAMETER:- (i) System voltage - 11 KV 3 phase (ii) Rated voltage - 12 KV (iii) Short time current rating – 21KA for 3 sec (iv) Rated short circuit PF with stand voltage- 28 kv RMS (v) Rated lightning impulse with stand voltage -75 kv peak (vi) System earthing ; Solidly earthed. (vii) Rated lightning impulse with stand voltage -75 kv peak (viii) Enclosure - IP-67(HV). (ix) Internal arc fault with stand capacity - 21 KA for 03 sec.

(b) CIRCUIT BREAKER INFORMATION:- (i) Reference IEC standard : IEC: 62271 - 100 (ii) Type of breaker - Vacuum circuit breaker (iii) Rated/Max voltage - 12 KV (iv) Rated current - 630 amps (v) Rated short circuit current - 21 KA for 3 sec (vi) Trip free anti pumping design – yes (vii) Position indication – aux switch, (viii) Control Power voltage range for trip coil and closing coil – 85%-110% (ix) Aux contact : 4 NO + 4 NC (x) Aux contact current rating - 10 Amps (xi) Control power voltage range motor – 85% -110%for spring charged mechanism. (xii) Spring charged after closing/opening - Yes (xiii) Control power voltage range motor – 85% - 110% (for spring charging mechanism) (xiv) Internal overpressure release device - pressure relief valve (xv) Nos of opening/closing of contacts without recharging - 01.

(c) LOAD BREAK SWITCH:- (i) Type of operation - Motorised operated and manual in case of emergency. (ii) Medium for insulation - SF6 gas (iii) Ingress protection for gas tank - IP 67 (HV) (iv) Type of disconnector - 3 position switch (v) Power frequency with stand voltage – 28 KV rms (vi) Lightning impulse with stand voltage - 75 KV peak (vii) Disconnector position indication – Limit switch (viii) Type of interlocking - Electrical and mechanical. (vix) Control power voltage range, Motor operated switch - 85% to 110% (x) Cable testing facility without disconnecting the cable terminations, cable joints and terminal protector on the bushings. (xi) Cable boxes suitable for 1x3Cx120 sqmm XLPE cable with right angle cable Termination Protector.

(d) MS base channel 100 mm chromium plated shall be provided for fixing of RMU on PCC foundation

Supply ,laying, jointing and testing 11 KV (Earthed), aluminum conductor, screened, XLPE insulated, armoured shielded and PVC sheathed cables conforming to IS 7098 (Part-II) amended upto date having cross sectional area 120 Sqmm 3 core complete all as specified and directed by the Engineer-in-Charge. Note :- Earth work, sand cushioning, pipe and PCC cable protection cover shall be measured and paid separately)

All as per item No 22 here-in-before but section area 95 sqmm 3 core,

Supply, laying and testing cable XLPE Insulated ,screened, PVC bedded, galvanized steel strip or wire armoured, electric power cables (heavy duty) 1100 Volts grade with stranded aluminium conductor of size 240 sqmm 3.5 core complete all as specified and directed.

Supply , jointing and testing cable jointing kit of 11 KV grade cable for outdoor termination, heat shrink type complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 70 Sqmm to 95 Sqmm complete all as specified and directed.

Supply, jointing and testing cable jointing kit of 11 KV grade cable for outdoor termination, hot shrink type complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 Sqmm to 185 Sqmm complete all as specified and directed.

Supply , jointing and testing cable jointing kit of 11 KV grade cable for indoor termination, hot shrink type complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 Sqmm to 185 Sqmm complete all as specified and directed.

M&L for chemical earthing complete with copper earth plate electrode 900mm X 900mm X 6 mm buried directly in ground vertically to a depth not less than 4.5 meter below normal ground level (with top edge of earth plate not less than 3.75 meter below ground level) connected to copper strip 32x6 mm main earthing lead by means of galvanized bolts, nuts and washers with connected to earth test point & to the neutral of transformers/RMU etc. all as specified and testing on completion with and including necessary excavation and earth work in any type of soil, earth electrode, earthing lead from electrode to equipment/substation/panel etc, adequate quantity ( in alternate layer 15 cm all around the copper plate) of Bentonite, copper sulphate,charcoal dust and common salt, test point terminal block made out of phoshper bronzein sheet steel box, PCC (1:3:6) type C-1 (using 20mm graded black trap/granite/Basalt stone aggregate) for earth pit with 40 x 40 x 6mm mild steel angle iron frame for cover, pre cast RCC (1:2:4) type B-1 (using 20mm graded black trap/granite/Basalt stone aggregate) 40mm thick cover reinforced with 8mm dia TMT bars 3 Nos both way with 12mm dia round bar handle, GI light grade watering pipe 20 mm dia with funnel and wire mesh, and 40 mm dia GI light grade earth lead protection pipe, complete all as specified and directed.

M&L for earthing complete with galvanized steel earth plate electrode 600mm X 600mm X 6mm buried directly in ground vertically to a depth not less than 4.5 meter below normal ground level (with top edge of earth plate not less than 3.75 meter below ground level) connected to GI strip 32x6mm main earthing lead by means of galvanized bolts, nuts and washers with connected to earth test point & to main switch board /panel etc. all as specified and testing on completion with and including necessary excavation and earth work in any type of soil, earth electrode, earthing lead from electrode to equipment/substation/panel etc, adequate quantity of charcoal dust and common salt, test point terminal block made out of phoshper bronzein sheet steel box, PCC (1:3:6) type C-1 (using 20mm graded black trap/granite/Basalt stone aggregate) for earth pit with 40 x 40 x 6mm mild steel angle iron frame for cover, pre cast RCC (1:2:4) type B-1 (using 20mm graded black trap/granite/Basalt stone aggregate) 40mm thick cover reinforced with 8mm dia TMT bars 3 Nos both way with 12mm dia round bar handle, GI light grade watering pipe 20 mm dia with funnel and wire mesh, and 40 mm dia GI light grade earth lead protection pipe, complete all as specified and directed.

All as per item serial No 29 above but connected to GI strip of size 25x4 mm complete all as specifie and directed.

M&L for earthing complete with copper earth plate electrode 600 mm X 600 mm X3.15 mm buried directly in ground vertically to a depth not less than 4.5 meter below normal ground level (with top edge of earth plate not less than 3.75 meter below ground level) connected to copper strip 32x6 mm main earthing lead by means of galvanized bolts, nuts and washers with connected to earth test point & to the neutral of transformers/RMU etc. all as specified and testing on completion with and including necessary excavation and earth work in any type of soil, earth electrode, earthing lead from electrode to equipment/substation/panel etc, adequate quantity ( in alternate layer 15 cm all around the copper plate) of Bentonite, copper sulphate, charcoal dust and common salt, test point terminal block made out of phoshper bronzein sheet steel box, PCC (1:3:6) type C-1 (using 20mm graded black trap/granite/Basalt stone aggregate) for earth pit with 40 x 40 x 6mm mild steel angle iron frame for cover, pre cast RCC (1:2:4) type B-1 (using 20mm graded black trap/granite/Basalt stone aggregate) 40mm thick cover reinforced with 8mm dia TMT bars 3 Nos both way with 12mm dia round bar handle, GI light grade watering pipe 20 mm dia with funnel and wire mesh, and 40 mm dia GI light grade earth lead protection pipe, complete all as specified and directed.

Supply and fix Copper strip of size 25x4 mm as main earthing lead complete all as specified and directed.

Supply and fix GI strip of size 25x4 mm as main earthing lead complete all as specified and directed.

Pin type, porcelain, vitreous, white, brown or green insulator including one galvanised mild steel spindle, two galvanised iron washers and one galvanised iron nut, 150 mm height, 150 mm dia for 11000 volts grade complete all as specified and directed.

Shackle/Disc type, Porcelain, vitreous, white, brown or green insulator including galvanised mild steel straps, washers, insulator bolts, washers and nuts,for working pressure 11000 voltas grade of size150 mm height and 150 mm dia complete all as specified and directed.

All as per item No 35 here-in-before but workign pressure 1100 volts grade of size 75mm height and 90mm dia

Tubes, 'light grade' galvanised100 mm bore, with all fitting and fixed complete fixed along pole , road/drain crossing complete all as specified and directed.

M&L cable route indicator for HT 11 KV cable of size 4" dia Round plate with stand of angle Iron duly marked with HT 11 KV /MES including necessary PCC for fixing complete all as specified and directed.

Supply and fixing on HT pole danger notice plate for HT 11KV/33KV of size 25 cm x 20 cm , 1.6mm thick mild steel sheet vitreous enameled white with letters, figure and conventional skull & bones “DANGER” etc. in signal red colour and fixed with MS clamps made out of 25mmx3mm MS flat iron, nut, bolts complete all as specified and directed.

M&L for Supply, erecting and fixing in true vertical position, steel tubular swaged pole (410 SP – 55), 11 mtr long, complete with cast iron base plate, pole cap / finial taper plug, bolts, nuts and washers, welded reduced section and longitudinal weld throughout entire length of pole with and including 2 coats of black bituminous paint externally upto planting depth and including painting to poles up to 1200 mm height (from top of PCC coping) with two coats of synthetic enamel paint in alternate strips 300 mm high each in yellow/red and black paint and rest exposed surface of pole with two coats aluminium paint over a coat of red oxide zinc chrome primer including numbering on poles complete all as specified and directed by Engr-in-Charge. Note - Earthwork,PCC work in foundation& coping of pole, Cross arms, danger notice board and anti climbing device shall be measured and paid separately.

Anti-climbing device; spikes type fabricated out of M.S. bars (round, square and flat) including nuts, bolts, washers and welding in two halves made to shape to suit the cross section of the pole complete all as specified and directed.

M&L for HT 11KV grade insulation sleeve 20mm dia heat shrink type complete all as specified and directed.

Boring of holes under road, pavement, hard standing by trenchless technology using ultra sounding technique and necessary machine for inserting of 100 mm GI pipe . Note :- (a) Length of bore hole under road /pavement shall be as per site reqirement. (b) GI pipe shall be measured and paid separately under respective item.

M&L for supply and fixing of aluminium conductor, steel reinforced (ACSR) of any size/description on HT poles/lines including stringing, tightening, binding to insulators with aluminium wire making and connecting jumpers, connections etc including connecting, commissioning and testing complete all as specified & directed.

M&L for supplying, stringing and fixing GI continuous GI earth wire of size 4 mm / 3.15mm dia on HT poles as in cradle guards / earth wires etc including binding and taking down old crodded GI wire complete all as specified & directed.

Supply and installation and testing 11 KV outdoor type , gang operated Air-break switch triple pole mechanically operated ,mounted on insulator and steel frame with operating mechanism worked from ground level with suitable dia of GI pipe (Med. grade) operating rod of suitable length with an ON-OFF position capacity 200 amps with dropout fuse & 12 insulator with 03 Nos barrel fuse connected with new ACSR conductor (jumper) duly Logged incoming and out going with Steel nut bolts and washers all as specified and directed at site.

M&L for stay assembly for HT poles comprising of 20mm dia, 2.15 mtr long galvanized stay rod , having 7 / 3.15mm GI stay wire stranded and 300mm X 500mm X 6mm thick MS stay plate, complete all as shown on electrical plate No 1 of SSR, Part-I with and including all necessary fittings/accessories like loop type insulator overall dimensions 90mmx140mm, clearance of hole 25.5mm, shackle & stay clamps made out of 50x6mm MS flat iron, necessary excavation and earth work in soft/loose soil and PCC works in (1:3:6) type C-2 (using 40mm graded stone aggregate) complete all as specified and directed by Engineer-in-Charge.

M&L PCC (1:4:8) type D-1 (using 40 mm graded stone aggregate) for foundation of the pole complete all as specified and directed.

M&L PCC (1:3:6) type C-1 (using 20 mm graded black trap/granite/basalt stone aggregate) for coping of the pole including necessary form work complete all as specified and directed.

M&L cement concrete 100 mm thich Type D-2, 1:4:8 (40 mm graded stone aggregate as in repair of path for installations incl demolation of existing PCC complete all as specified and directed.

M&L for 150 mm thick PCC (1:3:6) type C-2 using 40mm graded stone aggregate laid in alternate bays, each bay n. exc 2.5m in length as in plinth protection, finishing cement concrete surface even and fair without using extra cement including fillings of joints with bitumen grade 85/25 complete all as specified and as directed.

M&L hard core,of broken brick bats to gauge n exc 63 mm as sub base complete all as specified and directed.

M&L for Brick work with subclass‘B’ bricks,straight or curved on plan exc 6m mean radius, built in cement mortar 1:6 for transformer platform complete al as specified and as directed.

15mm thick cement plaster with cement sand mortar (1:6) on fair faces of brick or concrete surfaces finished even & smooth without using extra cement complete all as specified and as directed.

M&L for preparing surfaces and applying 2 coats of of cement base paint on new plastered surface of walls complete all as specified and directed.

Material and labour for spreading and levelling crushed stone aggregate 63 mm 150 mm average thickness around transformer , two pole/four pole structure including removing of grass and bushes from roots of the area complete all as specified and directed.

M&L for Mild steel work of angle iron section or any section as in posts & struts for cattle/security fencing/ including cutting top to shape, drilling holes, notching for wires etc, flat iron fillets (for securing wire mesh etc) including 12 mm dia round running bar as in fencing post, including all necessary drilling, bolting or riveting etc and similar work conforming to Fe-410-w( Grade E-250 quality –A) complete incl painting with one coat of red oxide as primer and two coat black bituminous paint all as specified and as directed.

Framed work as in doors or gates of angle or other section with gusset plates, rails, braces, etc., complete, drilled for fixing of steel sheeting or other covering. Doors, etc. to be prepared for hanging or sliding with and including either hooks and hinges or steel hanging door fittings (exclusive of steel sheeting or other covering, running rails and guides) and hanging; also fastening and fixing complete including painting with one coat of red oxide as primer and two coats of synthetic emanel black paint complete all as specified and directed.

Supply only Chain link fencing conforming to IS-2721- 1979,Chain link MS galvanisd fencing, any size or type complete all as specified and as directed.

Fixing only chain link fencing including line wires, any mesh, size and type to any type of standards, rails, straining bolts, etc including provission of binding wire complete all as specified and directed.

Supply and laying High voltage Insulating ELECTROMAT of thickness 3 mm for system voltage 11 KV and breakdown voltage 65 KV made of elastomeric polymers material having high insulation resistance of size 1Mtr x5 Mtr complete all as per IS 15652 : 2006 complete all as specified and directed.

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 complete all as specified and directed.

R D Bansal

Goblin Electric Co.