PROVISION OF ELECTRIC SUPPLY TO CT SCAN AT INHS PATANJALI NAVAL BASE KARWAR UNDER GE (SB) KARWAR

Amount

Design, Manufacture, Supply, Installation, Testing and Commissioning of 11 kV / 0.433 kV, 315 kVA Factory Assembled, Factory Tested ready to install and connections type Compact Substation / Unitised Substation / Compact Substation with an outdoor enclosure, equipped with 315 kVA Cast Resin Dry type Transformer, 3 Way, 11 kV Ring Main Unit [SF6 Gas Insulated Switchgear] consisting of 02 Nos, 630A at 11 kV Fault Making Load Breaking Switch with mechanical interlock between Two Load Breaking Switches & 01 Nos Tee-Off as SF6 Gas insulated Vacuum Circuit Breaker and with 630 Amps, Air Circuit Breaker as secondary side control complete with HT Cable interconnection in between Transformer and RMU and suitable sized Copper Busbar between Transformer and LV Incoming Main Switchgear-ACB for full load output current of the transformer and Internal earthing connections by GI Strips all as a single transport unit complete all as specified as detailed below:

[a] Enclosure: Outdoor type enclosure having modular construction with 2mm thick Galvanized Sheet Steel in Corrugated / Louvered design type wall design for better heat dissipation and providing robust construction. The degree of protection for HT & LT switchgear compartment shall be IP54 & degree of protection of transformer compartment of the enclosure shall be minimum IP34. The enclosure exterior shall be painted with polyurethane paint / epoxy powder coated of 80 Microns thick and tropicalised to Indian weather conditions. Each compartment shall be provided with the door and pad locking arrangement. Doors of transformer compartment are fitted with Arc reflectors from the inside for providing better safety. The Compartment illumination lamp with door-operated switch shall be provided for each compartment. Structure of the substation shall be able to withstand the gross weight of all equipment. The Compact Substation shall be provided with lifting beams and hooks for easy installation at site and it shall be possible to transport the equipment along with Transformer, RMU & LT Panel from one site to another. Dimensions of enclosure shall be as per the components required and mentioned in BoQ. Final drawing shall be got approved from GE.

[b] HT Switchgear [Inside Compact Sub-Station]: Three Way 11KV, 630 Amps, 21 kA / 3 Sec Non-Extensible Ring Main Unit / Compact Switchgear with Copper Busbar, consisting of 630 Amps, Two Numbers [As incomer] fixed Manual Fault Making / Load Break Switches & One Numbers Fixed Manual SF6 insulated Vacuum Circuit Breakers [As Outgoing] in SF6 Gas insulated sealed for life minimum 2mm thick AISI 441 Grade stainless steel tank with IP 67 degree of protection with Air Insulated Metering Module, castle lock interlock shall be provided between two incomers such way that only one incomer shall switch on at any given point of time, One Number fault passage indicator shall be provided for each Load Break Switch with 1 NO + 1 NC Contact, One Number manometer shall be provided for outgoing feeders, One set of 80/1A, 2.5 VA, Class 1.0 for metering & One set of 80 / 1A, 2.5 VA, CL 5P 10 Current Transformers shall be provided, One number of Digital Multifunction Meter with RS 485 Port shall be provided for VCB Feeders, One Set of 11 kV / RT3 / 110 / RT3, Class 1.0, 50 kVA PTs shall be provided in Metering Module. Vacuum Circuit Breakers shall be with self-powered micro processor based Numerical Over Current and Earth Fault Relay having Charged Open / Closing Mechanism, On / Off Indicators, Mechanical Operation Counters etc.

Interconnection between RMU and Transformer shall be using suitable Aluminium unarmoured 11 KV [UE] 1 X 3 Core X 95 Sq.mm or 3 X 1 Core X 95 Sq.mm XLPE cable. Incomer / outgoing Load Break Switches shall be suitable for termination of 1 Run of 3 Core X 300 Sq.mm aluminium armoured XLPE Cable. [c] Transformer [Inside Compact Sub-Station]: 315 KVA, 11KV / 433V, 3 Phase, 50 Hz, DYn11, Air Natural Cooling Cast Resin Dry Type, Double Copper Wound, CRGO Core type Transformer with Off Circuit Tap Links of range +5% to –5% in steps of 2.5% on HT side of transformer with WTI Scanner with Alarm and Trip Contact, with Class "F" Insulation, having Primary Voltage [HT] 11 KV and Secondary Voltage [LT] of 433 Volts, Delta connected on 11 KV Side & Star connected on 433 Volts side, designed & constructed with particular reference to Tropical Condition, conforming to IS – 1180 [Part - I] with latest amendments and with Energy Efficiency of "Level 2" – 1 Nos. Losses shall be as per ECBC. [d] LV Switchgear [Inside Compact Sub-Station]: 415 Volts, indoor LV Panel with Aluminium Busbars [100% for Phase & 50% for neutral, fabricated using 2 mm thick CRCA Sheet Steel, Ingress Protection IP4X, Compartmentalised complete with internal wiring consisting of following:

[i] Incomer: MCCB, 630 Amps, FP, 36 KA, 415 Volts, 3 Phase, 50 Hz, Fixed Electrical type with Microprocessor based O/L, S/C, E/F Release – 1 Nos [ii] Metering for Incomer: Digital Multifunction Meter with A, V, KW, KWH, PF, Class 1.0 with Port – 1 Nos, LT Metering CT’s, 630 / 1A, Cast Resin Type, Class - 0.5 – 1 Set, R, Y, B, ON, OFF, Trip LED Indicating Lamps – 1 Set, Control MCB, SP, 6 Amps – As required [iii] Outgoing: MCCB, 400 Amps, TPN, 36 KA, 415 Volts, 3P, 50 Hz, Fixed Manual type adjustable with Microprocessor based Thermal magnetic O/L, S/C & E/F release – 3 Nos. [iv] Metering for Outgoing: Digital Multifunction Meter with A, V, KW, KWH, PF, Class 0.5 with Port for each outgoing feeder, LT Metering CT’s, 600 / 1A, Cast Resin Type, Class - 0.5 – 1 Set, R, Y, B, ON, OFF, Trip LED Indicating Lamps – 1 Set, Control MCB, 6A, SP – As required

[v] Outgoing MCCBs of LT Switchgear shall be suitable for termination of 2 Runs X 3½ Core X 300 Sq.mm aluminium armoured Cable. Qty - 6 Nos. [f] Compact Substation shall be outdoor Plinth Mounted Type. The rate quoted is deemed to be including the cost of Erection, Commissioning of Compact Substation and Civil work such as Construction of foundation with Concrete / Brick masonry with plastering for the installation of Compact Substation of required size including trench for the cabling work etc. complete in all respect as directed by the GE. However the bidder shall furnish the foundation details for approval of GE before executing the work. [g] Compact Substation shall be complete with the internal interconnections & Earthing [GI] and extending of earth bar of Neutral and body terminals to the frame of the Compact Substation for connecting to the earth pits. [h] The bidder shall assemble the Compact substation at factory and no assembly of the same shall be allowed at site. Bidder shall be responsible for Installation & commissioning Compact substation. Technical data sheet of the Transformer, HV / LV Switchgear, Relay etc. shall be submitted to GE for approval before placing the supply order.

[i] The equipments should be SCADA compatible in future by providing motor in future. [j] The bidder shall supply suitable & required no. of HT & LT Cable termination kits along with Compact Substation for HT & LT Cable terminations. [k] The Design for Internal Arc Fault shall be tested for 20KA for 1 Second as per IEC 1330/62271-202. [l] Pre-Dispatch Inspection: Bidder shall offer for pre-dispatch inspection at OEM works. Only after the equipments are cleared by the department in writing, the bidder can dispatch the equipment. Routine tests shall be conducted and original test certificates shall be submitted at the time of Pre-Dispatch Inspection. [m] Commissioning Spares: Additional commissioning spares such as Digital Multifunction Meter – 1 Nos, Indication lamps – 3 Nos, Protection Relay – 1 Nos, Spring Charging Handles – 2 Nos and Panel Keys – 2 Nos shall be provided by the bidder. [n] Suppressors or other protection devices shall be provided, if required as per schedule of quantities, wherever the sub-station installation is likely to interfere during the operation with any other electric or electronic equipment.

[o] All fittings, unit assemblies accessories, hardware foundation bolts, terminals blocks for connections, cable glands and miscellaneous materials and accessories of items of work which are useful and necessary for efficient assembly and working of the equipment shall be deemed to have been included within the scope of the work in the tender and within the overall details for complete item whether they have been specifically mentioned or not. [p] Supplying and fixing MV Danger Notice Plate of 200 mm X 150 mm, made of mild steel, at least 2 mm thick, and vitreous enamelled white on both sides, and with inscription in single red colour on front side as required. [q] Supplying and fixing HT Danger Notice Plate of 250 mm X 200 mm, made of mild steel, at least 2 mm thick, and vitreous enamelled white on both sides, and with inscription in single red colour on front side as required.

Supply and laying or fixing or passing through pipe or in cable ducts, 11000 volts (E) grade XLPE insulated,screened, PVC bedded, galvanised steel strip or wire armoured, electric power cables (heavy duty) with aluminium conductor of 3 core 120 Sqmm size.

Supply, jointing & testing Indoor end termination cable joininting kit,heat shrinkable type 11 KV HT joint kit suitable for PVC / XLPE insulated stranded aluminium conductor of size 3 core 120 Sqmm to 185 Sqmm all as specified and as directed.

Supply and Laying LT UG cable 1100 Volts grade XLPE insulated PVC sheathed amoured, heavy duty, in trenches/walls/poles/passing through pipes with multistranded aluminium conductor including lugs/thimble/ferules connection, testing and commissioning complete of size 3.5 core 185 sqmm. Note: [i] Earth work, excavation sand cusioning, bricks for protection, GI pipe etc shall be measured separately under relevant items of this schedule work

GI tubing 'Light' grade 100 mm bore with all fittings for cable protection fixed on poles/walls/laid under roads crossing etc and made good the disturbed surfaces/area for following sizes of pipes :-

Cutting the tarmac / hard standings and excavating in trenches across the road for laying cable including making good the excavated portion by means of PCC 1:3:6, type C1 matching with the surroundings all as directed.

Excavation in trench not exceeding 1.5 mtr wide and not exceeding 1.5 mtr in depth and not exceeding 1.5m for laying of LT under ground cables/GI pipes getting out as in soft /loose soil complete all as specified and directed.

Returning filling in including spreading levelling watering and well ramming in layer not exceeding 25 cm in soft/loose soil all as specified and directed.

Removing excavated material/soil not exceeding 50m and depositing where directed at a level not exceeding 1.5m above the starting point all as specified and directed.

Supply & filling sand cushioning to under ground cable 8 cm before laying the electric cable and 15 cm after laying the cable complete all as specified considering as per SSR 1991 of part -I Note: Only punned thickness of the sand will be meausured.

Supply and lay un-reinforced pre-cast concrete cable cover, class HV, type 1, flat, size 300mm x 180mm x 40mm complete all as specified and as directed.

Supplying and laying unreinforced precast concrete cable cover, class LV Type-1, flat size 250mm x 150mm x 40mm with ISI mark factory made complete all as specified and directed.

M&L for Earthing complete with galvanised steel earth plate electrode 60cm x 60cm and 6 mm thick buried directly in ground (earth pit not less than 2.25 metres deep below normal ground level) with top edge of plate not less than 1.5 meters below normal ground level, connecting to the Galvanised iron earth strip 32mmx6mm size, by means of bolts, nuts, check buts and washers of galvanised iron and 32mmx6mm earth lead protected by provision of GI medium grade pipe 40mm bore including provision 40mm thick cover of RCC (1:2:4) reinforced with XPM (weight not less than 4 Kg/Sqm) and frame of angle iron 40mmx40mmx6mm with 6mm dia MS bar handle made to shape, GI light grade 20mm bore pipe for watering of suitable length placed on top edge of earth plate, common salt and charcoal filling, 15 CM alternate layer of charcoal and salt around all sides of earth plate with fixing arrangements, funnel, wire mesh and earth work in any type of soil, returning filling in and removal of surplus soil to a distance not exceeding 50 metre complete all as per plate No 03 of SSR-2009 Part-I and connecting to earth test point all as specified or indicated including testing on completion.

ANKIT SHIP REPAIRERS AND SUPPLIERS

LEKSHMI ENGINEERS

M/S VIDHYUT ENGINEERS

RAVINDRA BROTHERS

M/S MANOJKUMAR M NAGARKATTE

Shree Ayyappa Engineering

JAI SHREE GOPAL ELECTRICALS