PROVN OF VCB, RMU, ALLIED WORKS AND SPECIAL REPAIR TO HT CABLE AT TECHNICAL AREA AT AF STATION BAMRAULI

Amount

Supply , installations , testing & commissioning of 11 KV of rating 630 Amp RMU unit outdoor type (IP-54) protection duly painted(Paint shade in painted Alu Zn/RAL 7032 on sheet steel for door and covers), VCB type-I RMU( RING Main Unit) four way comprising of three numbers insulated load break switch as outgoing and one number Vacuum Circuit Breaker as incoming inside . RMU should be provided with Copper Bus bar , one number fault passage indicator with each incoming and outgoing mechanism for interlocking arrangements for powered relay complete with all accessories as under. (a) RMU type installation Outdoor Extensible type, arc proof as per IEC : 62271-200 for design Manufacturing and testing . The RMU must have the following features/specification:-

INCOMER :- VCB should have following specification :- (i) Rated Voltage upto -12KV (ii) Rated power frequency withstand voltage -28KV(iii) Rated lighting impulse withstand voltage –should be minimum 125KVP (iv) Rated current for ring main feeder -630A (v) Rated current for VCB feeder -630A (vi) Rated short-time current-21 KA/3 Sec(vii) Rate Short making current -50KA (viii) Ambient temperature (-1 degree Celsius to +45degree Celsius), (ix) Degree of protection against accidental contact and ingress of foreign objects must be assured as under:- (aa) Main electric circuits : IP-67 (ab) Fuse compartment IP3X (ac) Operating mechanism –IPXC , (ad) Cable connection compartment-IPXC with site replaceable cable bushing .

OUTGOING :-(i) Each load break Switches includes:- (a) three position switches with position ON-OFF -EARTH (b) Manual operated spring mechanism ON-OFF-EARTH (c) Mechanical indicators for position ON-OFF-EARTH , (d) Mimic diagram at the front facia of RMU , (e) Capacitive Voltage indicator , (f) Padlocking facility , (g) Fault passage indicator for Earth Fault . (ii) Right angled Cable boots -3x sets (iii)The quoted rate shall be demmed to include cost of PCC foundation and PCC plateform of suitable size as per OEM recommendation 100 mm thick PCC 1:2:4 type B1 (20 mm graded stone aggregate) over 100 mm thick hard core of 63 mm complete. Make of RMU: as specified in particular specification.

The VCB shall have the standard of IEC 62271-100, 400Amps, 11 KV, 50Hz with short circuit current rating 25 KA for 3 secs. The breaking capacity of VCB shall design for 25 KA and making capacity of 62.5 KA peak with maximum temperature rise over ambient shall be within limits as per IEC 2271-100. The contact resistance of main pole<60 micro-ohms, dry-1minute power frequency with stand between line terminal and ground object-28KV rms, between terminals with breaker contact open 25kv rms 1.2/50 micro second full wave impulse between line terminals and grounded object. The spring charging motor shall have 230V AC and charging time required for motor 15 sec (Max). The ground clearance of VCB shall be as per manufacturers GA drawing. The panel shall be designed for floor mounting, free standing, simplex type control and realy panel in sheet enclosure with powder coated paint after suitable pretreatment with IP4X protection. The panel shall be fabricated from 2mm MS sheet for side/top/Rear and with 3.15mm for front/Gland plate paint shade exterior shade 631 of IS-5. Panel size shall not be less than 750mm(width)x600mm(Depth)x220mm (including 100mm base channel). the CT and PT shal be designed suitable for connecting of 500KVA transformer.

Note :- (i) Any other spares/material required for protection of transformer/VCB may be included as per design parameters. Make of VCB: ABB/SCHNEIDER/SIEMENS or as specified in particular specification. (ii) The quoted rate shall be demmed to include cost of PCC foundation and PCC plateform of suitable size 100 mm thick PCC 1:2:4 type B1 (20 mm graded stone aggregate) over 100 mm thick hard core complete.

Supply, laying, jointing & testing cross linked polyethylene insulated (XLPE) galvanised steel strip armoured cable with aluminum conductor, 11 KV `E’, of cross sectional area 95 Sqmm, three core (IS-7098) laid in trenches/through pipes/ducts or on poles at crossing of OH lines of MES and road crossing complete all as specified and directed by Engineer-in-Charge. Note :- (i) Excavation, earthwork, cable protection cover, cable joint, sand cushioning shall be measured and paid for separately under respective item of this schedule.

Supply, laying, jointing & testing cross linked polyethylene insulated (XLPE) galvanised steel strip armoured cable with aluminum conductor, 11 KV `E’, of cross sectional area 120 Sqmm, three core (IS-7098) laid in trenches/through pipes/ducts or on poles at crossing of OH lines of MES and road crossing complete all as specified and directed by Engineer-in-Charge. Note :- (i) Excavation, earthwork, cable protection cover, cable joint, sand cushioning shall be measured and paid for separately under respective item of this schedule.

Supply, laying, jointing & testing cross linked polyethylene insulated (XLPE) galvanised steel strip armoured cable with aluminum conductor, 11 KV `E’, of cross sectional area 185 Sqmm, three core (IS-7098) laid in trenches/through pipes/ducts or on poles at crossing of OH lines of MES and road crossing complete all as specified and directed by Engineer-in-Charge. Note :- (i) Excavation, earthwork, cable protection cover, cable joint, sand cushioning shall be measured and paid for separately under respective item of this schedule.

S & F of Cable jointing kit for 11 KV (earthed) heat shrinkable, indoor termination suitable for cross sectional area 120 to 185 Sqmm, 3 core aluminium conductor XLPE Cable including jointing material, cutting of cable and accessories complete all as specified and directed by Engineer-in-Charge.

S & F of Cable jointing kit for 11 KV (earthed) heat shrinkable, straight through suitable for cross sectional area 120 to 185 sqmm, 3 core aluminium conductor XLPE Cable including jointing material, cutting of cable and accessories complete all as specified and directed by Engineer-in-Charge.

S & F of Cable jointing kit for 11 KV (earthed) heat shrinkable, out door termination suitable for cross sectional area 120 to 185 Sqmm, 3 core aluminium conductor XLPE Cable including jointing material, cutting of cable and accessories complete all as specified and directed by Engineer-in-Charge.

S & F of Cable jointing kit for 11 KV (earthed) heat shrinkable, indoor termination suitable for cross sectional area 95 Sqmm, 3 core aluminium conductor XLPE Cable including jointing material, cutting of cable and accessories complete all as specified and directed by Engineer-in-Charge.

S & F of Cable jointing kit for 11 KV (earthed) heat shrinkable, straight through suitable for cross sectional area 95 sqmm, 3 core aluminium conductor XLPE Cable including jointing material, cutting of cable and accessories complete all as specified and directed by Engineer-in-Charge.

Supply , laying, jointing and testing in replacement of underground LT cable XLPE insulated ,screened PVC bedded , galvanised steel strip or wire armoured electric power cables (heavy duty) 1100 Volts grade with stranded aluminium conductor of size 300 Sqmm 3.5 Core laid in trenches/ducts/along poles/ through pipe under road complete all as specified and directed by Engr-in-Charge

Supply and fixing cable jointing kit for 1.1 KV grade cable for straight through joint complete with Jointing material heat Shrink type and accessories suitable for 3 ½ core XLPE, armoured, Al conductor cable of size 120/95 sqmm, Outdoor type complete all as pecified and directed by Engr-in-charge.

Supply and fixing cable jointing kit for 1.1 KV grade cable for straight through joint complete with Jointing material heat Shrink type and accessories suitable for 3 ½ core XLPE, armoured, Al conductor cable of size 70/50 sqmm, Outdoor type complete all as pecified and directed by Engr-in-charge.

Excavating in trenches (soft/loose/dense soil), n.exc. 1.5metre wide and n.exc. 1.5metre deep and getting out complete all as specified and directed by Engineer-in-Charge.

Returning filling in foundation / trenches including spreading leveling, watering and well ramming in layers not exceeding 25cm thick in soil complete all as specified and directed by Engineer-in-Charge.

Removal of surplus excavated material to a distance n.exc. 50 metre and depositing where directed at a level n.exc. 1.5 metre above starting point complete all as specified and directed by Engineer-in-Charge.

Supply and spreading clean and dry screened sand (unwashed) in trenches around the cable for cushioning complete all as specified and directed by Engineer-in-Charge.

Supply and laying un-reinforced precast concrete cable cover class HVP type 2 with peak size 450 mm x 180 mm x 40 mm complete all as specified and directed by Engineer-in-Charge.

Supply and laying sub class 'B' brick old size laid flat in trenches across the length for protection of cable as cable cover complete all as specified and directed .

Earthing complete with galvanised steel earth plate electrode 600x600x6mm thick directly burried in ground (earth pit not less than 2.25 m deep below ground level) with top edge of earth plate not less than 1.5metre below the ground level connected to GI strip 32x6 mm by means of bolts nuts check nuts and washers of galvanised iron at 2 points & GI pipe 40 mm bore medium grade for protection of earth strip, PCC chamber 1:3:6 (type C-1) using 20mm graded stone aggregate, funnel with wire mesh, 50 mm thick cover of RCC 1:2:4 type B-1 using 20mm graded stone aggregate reinforced with 8 mm MS bars at 150 mm centre to centre both ways, CI frame and charcoal dust and common salt, all as shown in electrical plate No. 3 of MES SSR part-I and making test point as specified including excavation & earth work in any type of soil and connecting the earthing to an earthing point/equipment as specified and directed & testing on completion.

NOTES : (i) The concrete pit shall be made in PCC 1:3:6 type C-1, using 20mm graded crushed stone aggregate 40mm thick precast cover slab of RCC (1:2:4), type B-1, using 20mm graded crushed stone aggregate with suitable MS handle in lieu of CI cover. (ii) Item includes the cost of 7.5 metre GI pipe for protection of earth strip. Any variation in length shall be adjusted through deviation order (iii) Items includes cost of 7.5 metre earth lead strip. Any variation in length shall be adjusted through deviation order. (iv) Earth electrode shall be surrounded by adequate quantity of charcoal dust and salt to a packed thickness of 15 cm on all sides

Checking identifying the defect/fault point of HT cable using cable fault locator machine and rectifying the defects with removing of defective portion, making cable joint using strait through joint and meggering & re-storation of electric supply pertains to external electrification of any type/any size/any nature of faulty HT electric cable/circuits complete all as directed for the following length of cable :- (Note : (i) Cable fault locator machine with all T&P required for identifying the faulty point will be arrange by contractor which cost is included in unit rate. (ii) Straigtht through joint will be measured & paid seperately in the relevent item.)

length of cable 0 to 500 mtr

length of cable 0-1000 mtr

Taking out old HT XLPE cable of size 95 sqmm to 185 sqmm complete all as specified and directed by Engineer-in-Charge. Note :(i) Old cable shall be contractor property and necessary amount as per schedule of credit shall be deducted from contractor's due payments.

Taking out old cable jointing kit any type of size 95 sqmm to 185 sqmm of HT XLPE cable complete all as specified and directed by Engineer-in-Charge. Note :(i) Old cable jointing kit shall be contractor property and necessary amount as per schedule of credit shall be deducted from contractor's due payments.

M/S MALHOTRA ENGINEERING WORKS

Bharat Sales Corporation

Titco Electricals

DEORA ELECTRIC WORKS