Special repair to old VCB converter to new SF6 circuit breaker (630 Amp) including allied works at AF Stn Najafgarh under GE (AF) Tughlakabad

Amount

Supply, installation, commissioning and testing of HT 11 KV, 630 Amps, 21 KA/3s, 3 Phase, 50 Hz, Outdoor non extensible RMU with two Nos manual operated load break switch, two Nos manual operated VCB with CTs and relays in VCB overload and earth fault protection complete all as specified and directed by Engr-in-charge with the following specifications:- (i) Rated Voltage- 12 KV, (ii) Rated Power frequency withstand voltage – 28 KV1 (iii) Rated Lightening impulse withstand voltage – 75 LV (iv) Rated Current for ring man feeder – 630 A @ 40 deg C // 565 A @ 50 deg C (v) Rated Current for VCB feeder – 630 A @ 40 deg C // 565 A @ 50 deg C (vi) Rated Short time current (lk) – 21 KA per 3 second (vii) Rated Short making current – 50 Ka (viii) Ambient temperature – 40 deg C (ix) Internal arc rating/classification – 21 KA per 0.1 sec per A FLR (with pressure release downwards) (x) Enclosure for RMU with degree of protection: IP54 Outdoor (xi) Bus bars: Copper SF6 fas insulated.

Contd sl item No 1.00: (xii) Stainless steel thickness for SF6 gas tank: 2.5 mm (3 sides), 1.6 mm (3 sides) grade: SS304 material & sheet thickness for outer inclosure: CRCA of thickness 2 mm. (xiii) Paint shade/procedure/paint layer thickness: RAL7032/7 tank powder coating process /100 + 25 micron. LOAD BREAK SWITCH – 02 NOS (i) Operating mechanism for switch dis-connector ON-OFF (ii) Operating mechanism for earth switch OFF-Earth (iii) Mechanical mimic indications showing ON-OFF-Earth (iv) Fixed type capacitive voltage indicator (CVI)-Make: Leelen (v) Pad locking facility (vi) Cable cover standard with interlocking (vii) Provision for connecting 1Rx3Cx300 Sqmm power cable. VACUUM CIRCUIT BREAKER – 02 NOS (i) Operating mechanism of VCB with position ON-OFF (ii) Operating duty: 0-3 min - C0 - 3 min - CO (iii) VCB auxiliary switch with 2NO+62NC+2CH (iv)Operating mechanism for dis-connector ON-OFF (v) Operating mechanism for earth switch OFF-Earth (vi) Fixed type capacitive voltage indicator (CVI)-Make: Leelen (vii) CT operated low energy release- 01 No (viii)LV current transformer-200-100/1A, CI.5P10, 2.5 VA-03 Nos (ix) Self powered relay having protections (50, 51, 50N, 51N): Make: C&S/Ashida

Contd sl item No 1.10: (x) Pad locking facility (xi) Cable cover standard with interlocking (xii) Provision for connecting 1Rx3Cx120 Sqmm power cable. COMMON ACCESSORIES (i) SF6 gas pressure indicator mounted on the gas tank - 01 No (ii) Operating handle - 01 No (iii) Cable boots to terminate 1x3Cx300/120 Sqmm per feeder.

Supply & laying XLPE insulated, wire armoured, heavy duty electric cable with alluminium conductor, 11000 volt grade cross sectional area 120 Sqmm 3 core complete all as specified and directed by Engr-in-charge.

S&F cable jointing kit for 11 KV (earthed) grade cable for outdoor termination, heat shrink type joint 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 by Engr-in-Charge.

Excavation in trenches soft/loose soil not exceeding 1.5 mtr wide and not exceeding 1.5 mtr in depth for foundation etc or for laying of underground cable/shaft well, cesspits, manholes, fire hole etc not exceeding 10 Sqmm on plan and not exceeding 1.5mtr in depth and getting out complete all as specified and directed by Engr-in-Charge.

M&L for sand cushion in trenches with natural local river sand for cable protection including watering and consolidation complete all as specified and directed by Engr-in-Charge.

Supply and laying well burnt sub class ‘B’ bricks of size 23x11.5x7.5 cm locally available in trenches for protection of underground cable complete all as specified and directed by Engr-in-Charge.

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

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

M&L for Earthing complete with copper earth plate electrode 600mmx 600mm x 3.15mm thick buried directly in ground (earth pit not less than 2.25mtr deep below ground level) with top edge of the plate not less than 1.5 mtr below ground level connected to copper strip of 25x3.15 mm by means of nuts, bolts, washers including charcoal dust common salt and necessary excavation in soft/loose soil, returning filling in and removal of surplus soil to out of the MoD land, PCC 1:3:6 type, C-1 by using 20 mm graded stone aggregate with precast RCC Cover slab 40 mm thick in PCC 1:2:4, type B-1 by using 20 mm graded stone aggregate reinforced with 8 mm dia MS bars @ 75 mm c/c both ways, MS handle of 12mm dia, PGI funnel wire mesh and 20 mm dia GI pipe light grade and earth protection pipe of 40 mm dia GI pipe light grade connected to earth work complete all as specified and directed by Engr-in-charge.

M&L for earth continuity conductor or copper main earthing lead fixed to wall or bottom on porcelain insulator or recess on chases or buried in ground or drawn in conduit/pipe of size 25 mm x 3.15 mm strip complete all as specified and directed by Engr-in-charge.

Demolition of cement concrete in ground floors and pavings not exceeding 15 cm thickness (below or above ground level) complete all as specified and directed by Engr-in-charge.

Dismantling plain or corrugated steel sheeting any gauge thickness including Nainital or similar pattern roof covering complete all as specified and directed by Engr-in-charge.

Dismantling wrought iron or mild steel work of any description not otherwise provided for complete all as specified and directed by Engr-in-charge.

Excavation soft/loose soil in post holes or similar holes each not exceeding 0.5 Cum getting out, returning, filling in and ramming earth or broken rubble mixed with earth around in layers not exceeding 25 cm complete all as specified and directed by Engr-in-charge.

S&F posts and struts in fencing including cutting tops to shape, drilling holes, notching for wire etc, flat iron fillets for securing wire mesh including all necessary drilling, bolting or riveting etc and similar work conforming to Fe-290 grade E-165 complete all as specified and directed by Engr-in-charge.

M&L for plain cement concrete 1:3:6 type C2 by using 40 mm graded granite stone aggregate in foundation, filling and mass concrete complete all as specified and directed by Engr-in-charge.

Dismantling fencing wire mesh any type and any position complete all as specified and directed by Engr-in-charge.

S&F chain link fencing including line wires any mesh, size and type to any type of standards, rails, straining bolts etc including provision of binding wire old or new complete all as specified and directed by Engr-in-charge.

S&F framed work as in doors or gates of angle or other section with gusset plates, rails, braces, drilled for fixing of steel sheeting or other covering, doors to be prepared for hanging or sliding with and hinges or steel handing door complete all as specified and directed by Engr-in-charge.

M&L for hardcore exceeding 63 mm but not exceeding 100 mm deposited, spread and leveled in layers not exceeding 15 cm thick, watered and rolled or rammed to a true surface complete all as specified and directed by Engr-in-charge.

M&L for 100 mm thick cement concrete 1:2:4 type B2 by using 40mm graded aggregate as in path/plinth protection finishing cement concrete surface even and smooth without using extra cement complete all as specified and directed by Engr-in-charge.

M&L for 80mm thick machine pressed precast concrete interlocking paver blocks of any type, any size and shape factory casted with grey cement and no pigment and conforming to IS 15658-2006 of M-40 Grade and joints filled with sand including 25 mm thick sand cushion in repairs complete etc complete all as specified and directed by Engr-in-charge.

M&L for sand filling under floors or in foundation including watering and consolidation complete all as specified and directed by Engr-in-charge.

M&L for brick work built in cement 1:4 with sub class 'B' old size bricks straight or curved on plan exceeding 6m means radius and external face or brick pointed flush in the same mortar complete all as specified and directed by Engr-in-charge.

M&L for rendering 15mm thick in cement mortar 1:6 on brick work or concrete surfaces and finishing the surface even & smooth without using extra cement complete all as specified and directed by Engr-in-charge.

S&F pre-painted galvalume aluminium zinc coating GI based plain steel sheet 0.50 mm thick of any colour having tensile strength of 550 Mpa as in roof covering/cladding to wall fixed with self tapping screws complete all as specified and directed by Engr-in-charge.

M&L for preparing new surfaces of walls and applying two coats of cement base paint on newly plastered surface for matching with repaired surfaces complete all as specified and directed by Engr-in-charge.

M&L for preparation of new steel surfaces of any description over 10cm width or girth not otherwise described and applying two coats of synthetic enamel paint (for steel surfaces) over a coat of red oxide primer complete all as specified and directed by Engr-in-charge.

Note: The amount of Rs 35,210.00 against schedule of credit given on Tender Serial Page No 28 shall be deducted from the total amount quoted by the contractor against BOQ while deriving the contract sum for acceptance.

Shiv Enterprises

Vishal Traders

M/S S.K.Electricals