AUGMENTATION OF POWER SUPPLY AT N1 SUBSTATION AT KATARIBAGH, NAVAL BASE KOCHI

Amount

Supply, Laying, connecting up and testing cable cables in trenches, or fixing on walls or passing through cable duct / pipe XLPE insulated, screened, PVC bedded galvanised steel strip or wire armoured electric power cables (heavy duty) with aluminium conductor, 11000 volts earthed, grade having cross sectional area 3 core 185 sqmm complete all as specified and as directed.

Supply, Laying, connecting up and testing cable XLPE insulated galvanised steel strip or wire armoured electric power cable with stranded aluminium conductor 1100 V grade of size 300 sqmm 3.5 core complete all as specified and as directed.

Supply, Laying, connecting up and testing cable XLPE insulated galvanised steel strip or wire armoured electric power cable with stranded aluminium conductor 1100 V grade of size 185 sqmm 3.5 core complete all as specified and as directed. Note for item No.1 to 3:- (i)Excavation & earth work, sand cushioning, Precast cable protection & GI pipe where required shall be measured & paid separately under relevant items.

S&F cable jointing kit for 11 KV earthed grade for indoor termination, heat shrink type joint with complete jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 185 Sqmm all as specified and as directed.

Supply, install, extension to and connecting up to existing ABB make outdoor RMU, testing and commissioning of outdoor both side extensible HT 12 KV rated voltage and 11 KV operating voltage, 3 phase 50 Hz, one way Ring Main Unit (+V+) Type :one fixed vacuum circuit breaker duly interlocked, battery charger, totally enclosed metal clad switch gear with motorized 24 volt DC battery bank and charger, protection relays, having rated current of Ring Switch and Breaker is 630 Amp, copper bus bar with danger notice board, with factory made weather proof enclosure by the switchgear manufacturer. The unit shall be painted in RAL7012/7035 paint shade with following specifications and all as per the IEC 62271 –200 and Type test report of RMU should include Internal Arc with AFLR classification and as per the specification of the manufacturer

(a) Vacuum Circuit Breaker : (i) Capacity 630 Amps, Triple pole, Vacuum Circuit Breaker, with independent motor charged spring mechanism and fully rated earth switch, with provision for earth of the cable. (ii) Air insulated cable box with gland plate suitable for bottom entry of single run of 3-core cable up to 300 sqmm. (iii) multi powered Over current & Earth Fault Relay with digital display(iv) Resin cast current transformers for protection circuit mounted on Cable bushings / cable box of ratio 60-30/1A, 5P10, 2.5VA. (v) Capacitive Voltage Indicators with LED Display. (vi) Mimic diagram on front panel, complete with status indicators (ON-OFF-EARTH). (vi) Motorised assembly. (vii) Epoxy Moulded low energy Tripping Coil for tripping the circuit breaker in fault condition. (viii) One set of Potential Free contacts for SCADA Compatibility. (ix) Right Angle Boots-NON TOUCH PROOF. (b) General specifications : (i) One set of positive standard mechanical interlocks to avoid unsafe operations. (ii) Provision of pad locking for open, close, earth position in correct sequence. (iii) Mano meter for indicating SF6 gas pressure with green and red zone. (iv) Three mm thick stainless steel SF6 tank with robotically welded construction with IP67 protection. (v) External stud for earthing connections. (vi) SF6 Gas re filling provision. (vii) Extendable bushings future for future extension with metallic end cap cover. (viii)Battery with charger

Supply and installation of 250 KVA copper wound transformer step down, outdoor type, off load tap changer complete with standard fittings, 11 kV/433 Volts, Rated Frequency 50 Hz, 3 phase 4 wire, Type of Cooling ONAN Vector Group Dyn 11,Connections (HV / LV) Delta / Star,Tappings on HV side +7.5% to -7.5% in steps of 2.5%, Class of insulation Class A, Lamination CRGO (M-4 Grade) Temperature rise at ambient Temp. Windings 55°C and for oil 50°C above ambient 50°C, Insulation level Impulse withstand voltage (HV) =75 kV ( Peak) b) Power frequency withstand voltage (HV/LV) 28 kV (rms) / 3 kV (rms) Terminal Arrangement (HV& LV) Cable Box with following fittings and accessories Rating and Diagram Plate, Top Filter Valve, Bottom Filter cum drain valve, Lifting lugs for whole Transformer, Earthing Terminals 2 Nos., Thermometer Pocket with plug, Air Release Plug on tank cover, Oil Conservator tank with drain plug, filing holes and cap, Oil Level Indicator, Drain-cum Filter valve with Plug, Silica-gel breather, Air Release plug, Explosion vent with double diaphragm, Radiators all as per IS 1180 level 2 including foundation and PCC plinth as per manufacturers recommendation and all as specified and directed. Note: - The contractor shall submit the general arrangement drawing specifying the make of components for approval of GE before placing order.

Materials and labour for earthing complete with galvanised iron earth plate electrode of size 600 mm x 600 mm x 6 mm thick, buried directly and preferably vertically in ground, earth pit not less than 2.25 Mtr deep below ground level with top edge of the plate not less than 1.5 m below ground level connected with and including galvanised earth strip of size 32 x 6mm by means of nuts, bolts, check nuts and washers made of galvanised iron or steel earthing lead to be protected by galvanised iron pipe 40 mm bore (light grade) and other end connected to earthing test point or lightening arrestor or main controlling switch as directed including providing funnel with 20mm bore galvanised iron pipe (light grade), wire mesh, charcoal or coke and common salt in alternate layer of 15cm (compacted thickness) all round the earth electrode, concrete earth pit in PCC (1:3:6) type C-1 (with 20mm graded aggregate), 50mm thick precast RCC (1:2:4) cover slab (re-inforced with 8mm dia TMT bar @ 15 cm C/C both ways and suitable handle made of 10mm dia) including necessary earth work in excavation, returning filling and removal of surplus earth upto a distance not exceeding 50 m etc all as shown on electrical plate No. 3 of MES Schedule Part-I(2009) complete including testing on completion all as specified and as directed.

S&F Outdoor double door LT panel with top canopy made out of MS sheet 3.15mm thick welded on angle iron frame 40x40x6mm duly grouted in earth incl PCC 1:3:6 type C1 with locking arrangement and 7 tank process powder coated painting complete with control wiring by providing PVC insulated solid copper conductor cable of suitable sizes alongwith protection fuses / MCB's etc including aluminium solid conductor with lugs or busbar for outgoing connection. The panel board shall have proper ventilation and cubical type, free standing floor mounted and general construction of panel conforming to IS:8623-1993 complete with PCC foundation and platformas per manufacturers recommendation or as per site requirement all as specified and directed with following accessories suitable for incoming/outgoing arrangements:-

(a) MCCB 400 AMP 36KA 4 pole with adj thermal and adj magnetic - 01 No (b) MCCB 160 AMP 25KA 4 pole (Adj thermal) - 02 Nos (c) MCCB 200 AMP 25KA 4 pole (Adj thermal) - 01 Nos (d) Aluminium bus bar 600 Amp TPN - 01 Set (e) LCD multi function meter - 01 No (f) Modular indicator 3 phase -01 Set of three (g) CT of suitable ratio 400/5 A - Set of 3 Nos Note: - (i) LT panel shall be factory made from a CPRI approved manufacturer only. (ii) The contractor shall submit general arrangement drawing and make, specification of all components of LT panel for approval of GE before placing order.

Excavation in trenches not exceeding 1.5M in depth and not exceeding 1.5M wide for laying pipes and getting out in soft/loose soil complete all as specified and as directed.

Returning fitting in soil including spreading, levelling , watering and well ramming in layers not exceeding 25 cm complete all as specified and as directed..

Removing excavated materials not exceeding 50 Mtr depositing where directed at a level not exceeding 1.5 mtr above the starting point complete all as specified and as directed..

M & L for River sand filling in trenches for cushioning of HT cables punning after filling complete all as specified and as directed. Note: Punned thickness shall only be measured and paid

Supply and lay un-reinforced precast concrete cable cover , class HV , Type I as per IS -5820 with flat size 300 x 180 x 40 mm laid dry in trenches over under ground cables complete all as specified and as directed.

Supply and lay un-reinforced precast concrete cable cover , class LV , Type I as per IS -5820 with flat size 250 x 150 x 40 mm laid dry in trenches over under ground cables complete all as specified and as directed.

Supply and fix GI pipe light grade of size 100mm dia under road crossing for protection of cable complete all as specified and directed.

PHEJAYS AGENCIES

M/s.Rejoy Constructions

WELTRONENGINEERINGSERVICES