PROVN OF VCB AND ALLIED ITEMS FOR DC LINES AT MIRAN SAHIB MIL STN UNDER GE JAMMU

Amount

Supply installation, testing and commissioning of VCB indoor type horizontally/vertically isolated horizontal draw out 800 Amp outgoing type 12 KV, 3 phase 50 HZ completely enclosed provided with mechanically interlock system duly insulated with shrinkable sleeves extendable complete all standard fitment and accessories and each comprising the following enclosed metal clad switchgear complete with Vacuum circuit breaker having rupturing capacity 250 MVA, overload and earth fault protection, ammeter, voltmeter and of rating upto 800 Amp compatible with existing make Note: VCB, shall be replaced by the authorise service engineer of the company & testing shall be done by the same after installation.

Srl item No 1 Contd … System Details : INCOMMING PANEL System Voltage : 12 KV Insulation Levels : 12/28/75 kV Frequency : 50 Hz Current Rating : 800A Short time rating : 26.3kA For 1 SEC Applicable Standard : IEC60056/ IEC62271-100,IS13118 Panel Details :- Application : INDOOR Paint shade : as per existing Busbar Material : ALUMINIUM Busbar Rating : 800A Cross Section : Suitable Sleeving : HT PVC Heat Shrink Earthbus ; 6X50MM Auxiliary Voltage : 230V AC Control Voltage : 24V DC Enclosure protection: IP4X I/C Cable entry : Through Rear Bottom O/G Cable entry : Through Rear Bottom

Srl item No 1.01 Contd … Breaker Details:- Type/Model : VCB Drawout & Isolation :HORIZONTAL DRAWOUT & ISOLATION Current Rating : 800 A Breaking Capacity : 26.3kA For 1 SEC Motorised / Manual : BOTH Auxiliary Contacts :8NO+8NC Operation Counter : YES Antipumping Feature : YES Motor Voltage : 230V AC Trip/Close coil voltage :24V DC

Supply and fixing in replacement switch air break gang operated triple pole mechanically operated from ground level, mounted on insulators and steel frame (12 insulator type) outdoor type suitable for vertical installation single break provided with locking arrangement consisting of MS channel, HT post top insulator with drop out fuses operating rod 25mm bore GI pipe medium grade confirming to relevant IS, current rating 200 Amp and voltage 11 KV including jumpering, lead of wire/cable as directed at site, complete all as specified and as directed.

Supply and fixing in replacement switch air break gang operated triple pole mechanically operated from ground level, mounted on insulators and steel frame (12 insulator type) outdoor type suitable for vertical installation single break provided with locking arrangement consisting of MS channel, HT post top insulator with drop out fuses operating rod 25mm bore GI pipe medium grade confirming to relevant IS, current rating 400 Amp and voltage 11 KV including jumpering, lead of wire/cable as directed at site, complete all as specified and as directed.

Supply and ererction in vertical position Steel tublar swaged poles erected truly vertical or planted as strut complete with 300x300x6 mm thick mild steel base plate continuously welded at bottom of pole and MS sheet 2 mm thick plug welded at top, B-118 finial taper cap,bolts,nuts & screws, poles made out of ERW MS tubing conforming to IS 2713 Part-II. Type 410-SP-55 (11.00 metres long) including drilling of holes of required size for fixing of cross arms, painting the exposed surfacs of pole with two coats of aluminium paint over a coat of two coats of zinc chrome primer and two coats of black bitumenous paint internally & portion embedded in concrete, making five black and white strips 30 cm upto 1.5mtr height from top of coping in strips and marking pole No. with black paint at suitable height, complete all as specified and directed. Note: Excavation and earth work, PCC in foundation shall be measured and paid for separetely.

Supply and fixing in replacement of 11000 Volt Arial bunched conductor having phase conductor of multistranded compacted circular aluminium conductor screen of extruded semi conducting compound extruded XLPE insulated , insulation screen of extruded semi conducting compound over all metellic screen of copper tape extruded PVC type ST-2 sheathed twisted around bare aluminium alloy messenger generally as per IS 7098 Part-II of size 3x95 SQMM + 1x 70 SQMM complete with dead end clamp,suspension clamp, Eye Hook ,welding and cable Jointing Kit as per site requirement with the existing HT disribution system complete, all as specified and directed by Engr-in-Charge.

Supply, laying, testing and commissioning HT underground cable XLPE insulated, screened, PVC bedded, galvanized steel strip or wire armoured electric power cables (heavy duty) with aluminium stranded conductor served with an inner sheathing of PVC tape armoured with galvanized steel strip and overall PVC sheathed 11000 volts grade (earthed) of cross sectional area of size 95 sq mm 3 core complete, all as specified and directed by Engr-in-Charge. Note: Excavation, earthwork and GI Tubing shall be measured and paid separately under respective items.

Plain cement concrete 1:4:8 ,type D-2 (using 40mm graded stone aggregate) in foundations, filling & mass concrete as in foundation of electric pole, struts, PCC blocks etc including necessary form work complete all as specified and as directed.

Plain cement concrete 1:3:6 type C-2 using 40mm graded crushed stone aggregates as in foundation of assembly, bed concrete, struts, PCC blocks etc including necessary form work and fair finished to exposed surface without using extra cement complete, all as specified and as directed by Engr-in-Charge.

Plain cement concrete 1:2:4 type B-1 using 20mm graded crushed stone aggregates as in coping and similar works including necessary form work and fair finished to exposed surface without using extra cement complete, all as specified and as directed by Engr-in-Charge.

Material and labour for loop type insulator, porcelain, vitreous, white, brown or green, small size with over all dimensions 90x140mm, clearance hole 25.5mm cmplete all as specified.

Excavating in trenches, not exceeding 1.5 m wide and exceeding 1.5 m in depth; for foundation, trenches for laying of cable etc. and getting out in any type of soil, complete all as specified and as directed by Engr-in-Charge.

Description all as per srl item No-11 above but each additional 1.5 metres or part thereof in depth beyond the first 1.5 metres.

Returning, filling in (soil) including spreading, levelling, watering and well ramming in layers not exceeding 25cm thick in any type of soil,complete all as specified and as directed by Engr-in-Charge.

Removing excavated material not exceeding. 50m and depositing where directed at a level n exc. 1.5 m above the starting point, complete all as specified and as directed by Engr-in-Charge.

Sub class ‘B’ old size well burnt bricks, laid flat with width equal to length of brick in trenches as protection to cable complete all as specified and as directed.

Dry coarse sand as cushioning to under ground cable provided with layer of 8 cms deep before laying the cable and 15 cms deep after laying and stretching the cable, punned to 18 cm thick complete, all as specified and as directed by Engr-in-Charge. NOTE: only punned thickness shall be measured for payment purpose.

Material and labour for Cable jointing kit for 11 KV (Earthed) grade cable for outdoor termination heat shrinkable end type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 95 sqmm and jointing materials for making joints and testing complete, all as specified and directed by Engr-in-Charge.

Material and labour for Cable jointing kit for 11 KV (Earthed) grade cable for indoor termination heat shrinkable end type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 95 sqmm and jointing materials for making joints and testing complete, all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement Stay assembly with accessories and GI stay rod 16 mm dia 1900 mm long, stay wire 7/4 mm stranded galvanised including mild steel stay plate 300 mm x 300 mm x 6 mm and galvanised thimble, galvanised steel 14 mm dia 400 mm long stay bow and GI nuts, washers including loop type insulator vitreous porcelain white, brown or green big size withoverall dimensions 90 mm x 140 mm clearance of hole 25.5 mm complete all as specified and shown in electrical plate No 01 of SSR Part - I complete, all as specified and directed by Engr-in-Charge. Note: Excavation, stay clamps and concrete work etc will be measured and paid separately..

Supply and fixing in replacment of ACSR conductor of any size and type from over head HT / LT poles including binding at site to insulator with suitable size of binding wire etc of any size and type and length at any position from LT / HT poles complete, all as specified and directed by Engr-in-Charge.

Material and labour in replacement of Galvanised steel wire 4.0 mm dia for continuous earth wire/cradle guard for HT overhead line 11/0.415 KV line complete, all as specified and directed by Engr-in-Charge.

Material and labour of cross arms, bracings, supports, clamps and back plates fabricated from structural steel sections including nuts, bolts and wasters,welding, bending cold or hot, drilling holes for bolts in any shape or size as indicated or directed and inclusive of one primer coat of red oxide primer and two coats of aluminum paint complete, all as specified and as directed by Engr-in-Charge.

Supply and fixing in replacementof Disc type, insulator, porcelain, vitreous, white, brown or green, 145 mm high and 255 mm dia ball and socket type for working pressure 11000 volts complete Single disc assembly for tension with tension clamps for conductors complete, all as specified and directed by Engr-in-Charge.

Supply and fixing of danger notice plate board of size 250 mm x 200mm for HT 11000 volts system made of 1.6 mm thick steel sheet , vitreous enameled white , with letters, figures and conventional skull and bones in signal red colour and fixed with MS clamps ,bolts,nuts of approved size, complete all as specified and as directed by Engr-in-Charge.

Supply and fixing in replacement of Insulator Pin type, porcelain, vitreous, white,brown or green 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 by Engr-in-Charge.

Supply and fixing in replacement Lightning arresters expulsion type complete with all fittings, transmission class, discharge capacity 65 kilo amp,11000 Volts grade conforming to IS-3070 part-I, complete, all as specified and directed by Engr-in-Charge.

Material and labour for earthing complete with Galvanized earth plate electrode 600 mm x 600mm x3.15mm thick buried directly in ground ( earth pit not less than 2.25 mtr below normal ground level ) with top edge plate not less than 1.5 metre below normal ground level and covered with alternate compact layer of comen salt and charcol dust, connected to galvanised earth lead wire of 4.0mm dia by means of GI nuts bolts, chuck nuts and washers of Copper earth lead including PCC pit in PCC 1:2:4 type B-1 RCC cover made out of cement concrete 1:2:4 type B-1 (using 20 mm graded crushed stone aggregate) reinforced with TMT steel bars 8 mm dia @150 mm c/c both ways with suitable handle and angle iron 40x40x5mm frame, GI medium grade watering pipe 20mm bore and funnel with wire mesh light grade protection pipe 40mm bore up to main board complete as shown on electrical plate No 3 of MES Sch 2009 (Part-I) and connected to earthing test point all as specified and directed by Engr-in-charge.

Srl item No 27 Contd … Notes :- Cost of following items are deemed to be included in unit rate:- (a) 15 mm nominal bore light grade GI protection pipe 7.5 mtr long for protection of earthing lead from mechanical injury or tempering. (b) Requisite quantity of common salt and charcoal. (c) Testing of earthing. Note: On testing after completion of earthing, if the desired earth resistance is not obtained, the earthing will be re-done by the contractor at his own risk and cost to the entire satisfaction of the Engineer-in-Charge.

Material and labour for earthing complete with Galvanized earth plate electrode 600 mm x 600mm x3.15mm thick buried directly in ground ( earth pit not less than 2.25 mtr below normal ground level ) with top edge plate not less than 1.5 metre below normal ground level and covered with alternate compact layer of comen salt and charcol dust, connected to Galvanized earth strip of size 25x4mm as earthing lead by means of bolts, nuts, chuck nuts and washers of Copper earth lead including PCC pit in PCC 1:2:4 type B-1 RCC cover made out of cement concrete 1:2:4 type B-1 (using 20 mm graded crushed stone aggregate) reinforced with TMT steel bars 8 mm dia @150 mm c/c both ways with suitable handle and angle iron 40x40x5mm frame, GI medium grade watering pipe 20mm bore and funnel with wire mesh light grade protection pipe 40mm bore up to main board complete as shown on electrical plate No 5 of MES Sch 2009 (Part-I) and connected to earthing test point all as specified and directed by Engr-in-charge.

Srl item No 28 Contd … Notes :- Cost of following items are deemed to be included in unit rate:- (a) 15 mm nominal bore light grade GI protection pipe 7.5 mtr long for protection of earthing lead from mechanical injury or tempering. (b) Requisite quantity of common salt and charcoal. (c) Testing of earthing. Note: On testing after completion of earthing, if the desired earth resistance is not obtained, the earthing will be re-done by the contractor at his own risk and cost to the entire satisfaction of the Engineer-in-Charge.

Electromechanics Engineers & Contractors

Jiwan Singh

Sarbat Construction Co

dinesh enterprises