PROVN OF 160 KVA INDEPENDENT TRANSFORMER FOR NFS NODE AT ALTINHO GOA

Amount

Supply, installation, connecting, testing and commissioning outdoor type 11 KV, 630 Amps, Extensible on both side, Outdoor Fixed Type (IP54), RMU (Ring Main Unit) 3-way comprising of 01 No 630 Amps, motor operated Load Break Switch (Comprising One No. Incomer) & 2 Nos. motor operated SF-6 insulated Vacuum Circuit Breaker as Outgoing, inside robotically /manually/ TIG welded stainless steel 304 (Non Ferrite Non Megnetic Grade) filled with SF6 gas at suitable pressure in accordance with the IEC, IEC-62271-103, tank having min thickness 2.5 (+/-) 0.5 mm having IP 67 Degree of Protection. The RMU tank shall provide full insulation, making the switchgear. insensitive to the environment with degrees of protection of IP67. The RMU shall be suitable for operations at a height upto 1000 meters above sea level and at 40 degree ambient temperature without any derating. RMU should be provided with internal busbars, as well as earthing busbars should be of copper, padlock provisions & complete with all accessories. The RMU shall be type tested for Internal arc test of 25kA/1 sec as per IEC-62271-200. RMU shall be equipped with site replaceable bushing. The earthing busbar shall be provided inside the each cable compartment for solid earthing of Cable sheilds. The outer enclosure main door should cover entire part of the switchgear including front cover and cable doors for providing complete IP 54 protection including raised foundation of suitable size, minimum 50 cm above and 01 meter below the natural ground level all as per manufacturer's drawing. The unit shall include the following with all necessary standard fittings as required at site:- (a) 01 No. Incoming Load Break Switch module should consist of following accessories :- 630Amps Load Break Switch module for making and breaking of fault current alongwith Earth Switch of full making capacity, Short time current - 25KA/ 1 sec, Making Capacity - 50KA, Auxiliary contacts - 1No + 1NC, Power frequency withstand voltage -28KV, Impulse withstand voltage - 75KV, Nominal operating gas pressure -1.3 (Minimum) Barbs, Front cover mechanism -IP2X, Cable covers -3X, Snap action mechanism for manual operation, Cable box for front termination of the cable suitable upto 3 core 300 Sqmm, 11KV XLPE cable Right angle boots (push on type), Suitable site replaceable Cable bushings, Arc proof cable covers with self Interlocking mechanism with earth switch , Capacitive voltage indication fixed type system as per IEC-61243, (i) Impulse withstand voltage- 75kVP (an altitude<1000 m above MSL). (ii) SF6 Gas pressure indicator. (iii) 230V AC shunt Trip coil for external trip signal (iv) Live cable indicating LEDs energised through capacitive voltage dividers. (v) All feeders of RMU shall be provided with multifunction meters having complete range of measurement including maximum demand and shall have serial port for communication. (vi) Metering compartment of RMU shall be provided with auxiliary transformer of suitable capacity to supply power to battery charger. (vii) Integral earthing switch with making switch. (viii) Emergency Trip Push Button. (ix) Transformer card for auxiliary protection. (x) RMU shall be provided with 3 core metering and protection CTs minimum ratio for protection CTs shall be 400-200-100/5/1, 5P10, 2.5 VA and for metering CT shall be 200/5/1A Class 1, 2.5 VA. (xi) 12 V Battery with battery charger with suitable burden for motor operation, Input 230 V AC & Output 24 V DC. NOTE : LBS shall have 3 positions, open or disconnected, closed and earthed, and will be constructed in such a way that interlocking prevents unauthorized operations. Manual opening and closing will be driven by a fast-acting /snap action mechanism, independent of operator action. LBS and earth switch shall have a min of 1000 (M1) mechanical operations , 100 electrical operations at rated current and 5 nos operations at rated SC current. (b) 02 Nos Outgoing Breaker module should consist of following accessories: (i) 630A Vaccum Circuit Breaker module for making and breaking of fault current alongwith Earth Switch of full making capacity. VCB should be capable to bear 40 dead short circuit operation. (ii) Short time current - 25KA/ 1 sec. (iii) Making Capacity - 50KA. (iv) Auxiliary contacts - 1NO + 1NC. (v) Power frequency withstand voltage - 28KV. (vi) Impulse withstand voltage - 75KV. (vii) Nominal operating gas pressure - 1.3(minimum) Bar abs. (viii) Front cover mechanism - IP2X. (ix) Cable covers - 3X. (x) Stored Enegry mechanism for Motor operation- 24VDC. (xi) Cable box for front termination of the cable suitable upto 3 core 300 Sqmm, 11 KV XLPE cable. (xii) Right angle boots (push on type). (xiii) Self Powered Microprocessor based Relay (3 O/C & E/F) with standard settings. (xiv) Digital Multifunction meter (A, V, KW, KVA, F, PF) with RS 485 port type (Rishabh/ Elmeasure). (xv) Suitable site replaceable Cable bushings. (xvi) Arc proof cable covers with self Interlocking mechanism between doors, earth switch, disconnector & VCB. (xvii) Capacitive voltage indication fixed type system . (xviii) Mechanical Indications for breaker ON, OFF, EARTH, TRIP, Spring Charged-Discharged. (xix) RMU shall be provided with 3 core metering and protection CTs minimum ratio for protection CTs shall be 400-200-100/5/1, 5P10, 2.5 VA and for metering CT shall be 200/5/1A Class 1, 2.5 VA.

(c) Bus Connected PT Unit -1 No. for Metering consisting of the followings :- (i) Type M: Air Insulated metering module 12KV, 630A, 25KA for 1 sec. - 3 Voltage Transformers of the ratio 11kV/√3 / 110 V/√3, 50 VA, Class 1.0 with HT fuses on primary side and MCB on secondary side. (ii) Microprocessor based IDMT (50, 50N, 51, 51N) relay for overcurrent, short circuit and earth fault protection. (iii) 01 No each LED Illumination. (iv) 01 No each Space Heater with thermostat. (v) Each RYB phase indications for 2 incoming and 1 out going. (vi) 1 Cable support bus bars, standard for 3 way unit. (vii) 1 set Bushings for external busbar connection alongwith Busbar cover & Sleeved busbars for coupling. (viii) 2x12 V Battery with battery charger with suitable burden for motor operation. Input 230 V AC & Output 24 V DC. (d) Capacitive voltage indication fixed type VPIS 9-15 KV. (e) Necessay interclocking arrangement for safety and operations. (f) One No. Operationg Handle for Manual Operation. (g) One No. Manometer. (h) Safety Interlocks Shall be provided as per relevant IEC/IS Standards and Manufacturer's directions. (j) Switchgear shall conform to all relevant IEC/IS Standards. (k) Manual operation of Vacuum Circuit Breaker should be possible without dismantling the motor from RMU. The motor should be fitted in such a way that it should not be outside of front covers of RMU. (l) Coupling of RMU and Metering module should be with the help of Bolted type arrangement, so that the coupling at site shall be easy. Plug-in type bushing shall not be acceptable. (m) All cable bushing should be replaceable type. (n) Module should be accommodated as per manufacturer's design. (p) RMU cable box shall be front accesible type to have easy access to protection and metering CTs. Vaccum Interupter should be of same Make. Cable box should be arc proof with bolted door and interlocked with respective earthing switches. Doors should be removable for the ease access to terminate cables. (q) A special paint coating shall be provided for RMU since the site is near coastal region. Make: Schneider/ ABB/ Seimens NOTES :- (i) The contractor will submit NABL accredited lab test reports of the RMU in original and the same shall be produced well before claiming RAR payment of the RMU. (ii) Cost of construction of plinth for accomodating RMU as per manufacturer's design shall be included in the quoted rates.

Supply, install, testing and commissioning Level 3, step down distribution transformer 160 KVA copper wound outdoor type 11000/433 volt, 3 phase 4 wire 50 cycles, naturally oil cooled type suitable for outdoor installation, connected delta on HV side and star on LV side with neutral brought out LT side with solid earthing system with off load tap changing switch on HT side to vary secondary voltage in steps of 2.5% each with in limit and with standard accessories like oil temperature with indicator for highest temperature gauge, silica gel, breather assembly, oil conservator tank with oil filling hole duly pluged, with bare HV and LV bushings, CI roller wheel, lifting lugs, explosion vent, air release plug, earthing terminals, oil drain valve of gun metal with plug, oil filter valve with plug, name rating and diagram plate, oil level indicator and arching horn set and other fittings/ accessories and for standard requirements with first fill oil including connections complete all as specified. NOTE FOR ITEM NO 1 & 2 ABOVE :- Pre-despatch inspection shall be carried out by the Rep of Accepting Officer. All arrangements for the same shall be provided by the contractor & cost thereof shall be included in the quoted rates.

Supply, laying, jointing and testing underground XLPE cable PVC insulated and PVC sheathed HT 11000 volts grade (E) (heavy duty) stranded aluminum conductor of size 95 Sqmm 3 core, laid up with inner sheath of PVC having overall PVC sheathed provided with galvanised steel flat strip armoured, conforming to IS-7098 (Part-II) 1985 with the latest amendments & laid in trenches, in floor, in duct, through pipes or along the pole complete all as specified & as directed. NOTES: (i) Excavation,Earthwork, sand cushioning , PCC protection cover, GI pipe and protection clamps shall be measured and paid for separately. (ii) High voltage test shall be carried out after laying and jointing of cables. All arrangement for the same shall be provided by the contractor & cost thereof shall be included in the quoted rates

Excavation in trenches in hard/dense soil not exceeding 1.50 mtr wide and not exceeding 1.50 mtr in depth for laying of cables and getting out complete all as specified and directed by Engineer-in-Charge.

Returing, filling in, including spreading, leveling, watering and well ramming in layers not exceeding 25 cm thick each layer compete all as specified and directed by Engineer-in-Charge.

Removal of surplus soil to a distance not exceeding 50 mtr 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.

Material and labour for sand cushioning gently punning down with a layer of sand 8cm thick before laying of cable and 15 cm thick after laying of cable in trenches complete all as specified.

Supply & laying un-reinforced precast concrete cable cover, class HV, type I, flat of size 300mm x 180mm x 40mm, laid flat in trenches over the cable as the length of cable cover shall perpendicular to the direction of cable length, adjacent/abutting each other complete all as specified and directed by Engineer-in-charge.

Supply, jointing and testing cable jointing kit for 11 KV grade cable for indoor termination heat shrink type joint complete with jointing materials and accessories suitable for 3 core XLPE armoured Aluminium conductor cable of size 95 sqmm all as specified and directed.

Supply, jointing and testing cable jointing kit for 11 KV grade cable for outdoor termination heat shrink type joint complete with jointing materials and accessories suitable for 3 core XLPE armoured Aluminium conductor cable of size 95 sqmm all as specified and directed.

M & L for earthing complete for RMU/ Transformer/ LT Panels with galvanised steel earth plate electrode of size 60cmx60cmx6mm thick buried directly in ground vertically at a depth not less than 2.25 metres below normal ground level with top edge of the plate at a depth not less than 1.5 metres below normal ground level, connected with and including GI strip 32mm x 6mm in and including GI pipe of 50mm bore medium grade as protection pipe (from top of earth plate up to the test point) and connecting strip to earth plate by means of GI bolts, nuts, check nuts and washers and thimbles at two places (minimum), earth plate surrounded by packed layers of charcoal dust and common salt 15cm thick, all around including top and bottom and GI pipe light grade as watering pipe of 20mm bore with funnel and wire mesh, PCC chamber of size 300mmx300mmx300mm (top of chamber minimum 15 cm above the normal ground level (1:3:6) using 20mm graded stone aggregate and RCC cover (1:2:4) type B-I using 20mm graded crushed stone aggregate of 25mm thick with 2 nos MS handles of 12mm dia bars including necessary excavation/ earth work in any type of soil/rock and as shown in Electrical plate No. 3 of SSR Part-I (2009) including testing on completion complete all as specified.

Supply and fixing galvanised iron pipe light grade ISI marked 80 mm bore for passing of cable, fixed to poles/ walls/ laid under floor with and including fittings complete all as specified and directed by Engr-in-Charge.

Supply and fix Danger notice plate for HT of 25 cm x 20 cm x 1.6 mm thick mild steel sheet vitreous enameled white, with letters, figures and conventional skull & bones and written as "DANGER" in signal red colour and fixed with MS clamps made out of MS flat 25 mm x 3thick including nuts & bolts and applying 2 coats of aluminium paint over a coat of red oxide primer all as specified. NOTE :- Instructions are to be written in three languages viz. -, Hindi, English and Local languages.

Re-routing/re-laying HT cable of any size by taking up cable protection cover, HT Cable by excavation carefully all as specified and directed. NOTES :(i) Re-laying of serviceable protection cover shall be deemed to be included in the quoted rate. (ii) Excavation removal and returning filling of soil will be measured and paid for seperatly under appropriate item.

Supply, install, testing and commissioning of CPRA approved Feeder pillar, outdoor cubicle type weather and vermin proof totally enclosed made out of 3 mm thick CRCA sheet machine pressed of suitable size, suitable to operate on 3 phase 4 wire system , 415volts, 50 Hz double door with front and rear openable with locking arrangements including frame of panel made out of MS angle iron of size 50mm x 50mm x 6mm, inner shutters for mounting switchgears, etc. independent bottom gland plate for each incoming & outgoing cable of suitable size as per switchgear rating and having apron on 3 sides of panel from base to ground level prewired complete duly powder coated with 7 tank process comprising with the followings complete all as specified :- (i) Bus bar strip, 4 pole and capacity 250 Amps copper strip of suitable size based on 1.5 Amps per sqmm, coloured with plastic coated insulated and sleaves in four colours (Red,Yellow, blue and black) fixed on porcelain insulators with necessary nuts, bolts and washers, etc. (ii) INCOMING : - (a) MCCB 250 Amp, 415 V, 25 KA, 4 pole with Adjustable thermal magnetic release -01 No. (b) Panel meters with LCD display -1 No. (c) Indicator with neon lamps for RYB, 3 Phase with MCBs set of three -01 set (iii) OUTGOING:- (a) MCCB 200 Amp, 415 V, 25 KA, 4 pole with fixed thermal magnetic release -01 No. (b) MCCB 100 Amp, 415 V, 16 KA, 4 pole with fixed thermal magnetic release -01 No. (c) MCB SPN 40 Amp, 240 V, 10 KA, C-Curve - 02 Nos. (d) Indicator with neon lamps for RYB , 3 Phase with MCBs set of three -02 sets.

M & L for cement concrete in foundation filling and mass concrete of PCC 1:3:6 type C2 (40 mm graded aggregate) complete all as specified and directed.

M & L for PCC concrete block msonary with solid blocks type B1 1:2:4 (20 mm graded aggregate) exc 10 cm in width and setting in cement mortar 1:6 complete all as specified and directed.

M & L for 15mm thick plastering with cement mortar 1:4 on fair faces of brick work or stone or concrete surfaces fiished even & smooth without using extra cement all as specified and directed.

M & L for preperation of newly plastered surfaces of external walls and applying 2 coats of cement base paint, over a coat of alkali resistant primer complete all as specified and directed.

M & L for 50 mm thick Cement Concrete type B-1, 1:2:4 (20 mm graded aggregate) as in coping and the ike including weathering, slightly rounded or chamfered angles and throating, including necessary form work complete all as specified and directed.

M & L for hardcore of gauge exc 63 mm but not exc 100 mm (brocken stone or boulder) deposited, spreaded and levelled in layers n. exc 15cm thick including watered and rolled/rammed to a true surface complete all as specified and directed.

M & L for 75 mm thick PCC 1:3:6 type C using 40 mm graded stone aggregates as in plinth protection complete all as specified and directed.

M & L for XLPE insulated heavy duty electric cables with aluminium conductor, 1100 volts grade cable of size 185 sq mm 3.5 core including necessary connection with suitable lugs & fixing arrangement with necessary clamps & cable glands etc complete all as specified directed .

Material and labour for brick protection using old size sub class ‘B’ new bricks, laid flat dry but jointed, laid lengthwise, perpendicular to the axis of cable all as specified and directed by the Engineer-in-Charge.

NATIONAL ENGINEERING CORPORATION