Special Repair Works including Installation Testing and Commissioning of 1600KVA 33 kV DryType Transformer for Provision of Dedicated Electrical Connection to the AirConditioning System of the Old Building at ESIC Medical College Hospital Joka

Special Repair Works including Installation, Testing and Commissioning of 1600KVA 33 kV Dry-Type Transformer for Provision of Dedicated Electrical Connection to the Air-Conditioning System of the Old Building at ESIC Medical College & Hospital, Joka, Kolkata.

Supply, installation, testing and commissioning of following capacity (continuous loading) 33/0.433 KV Delta/Star, step down, 3 Phase, 50 Hz, Dyn 11 vector group, Cast Resin / VPI (vacuum pressure impregnated) Dry Type, copper wound transformer (Electrolytic grade 99.9% pure copper, Core made of first grade Cold Rolled Grain Oriented (CRGO) Core grade MOH or better) AN (air natural) cooled transformer suitable for indoor applications with On Load Tap Changer (OLTC) on HV side having AVS relay and Remote Tap Changer Control (RTCC) for automatic sensing of incoming voltage, automatic operation of OLTC and facility for remote/ manual operation of OLTC HV side in range of +5% to -15% in steps of 2.5%, insulation class F (minimum), suitable for environment conditions class E4, suitable for fire behavior class F1,climate class-C1, having cable end boxes on HV side suitable for 3x400 sqmm XLPE cable of 33 KV grade with necessary hardware, clamps, lugs etc. for termination on HV/MV etc. for all transformers, bus trunking arrangement on LV side complete with all accessories and safety provisions as per relevant IS Code ,The transformer shall be provided with standard fittings/accessories as per relevant IS and mentioned below, protection alarm/trip protection, 3 nos. of Polymeric Zinc Oxide surge Arrestors on HV Side. Winding Temperature scanner (Digital) with alarm/Trip contacts with RTD Sensors per LV winding and space for mounting differential protection CT's in LV chamber with neutral brought out separately including supplying and laying of copper conductor multicore control cable from transformer to HT breaker/HT Panel for safety tripping, complete as confirming to IS-2026 Part-11, i/c supplying and grouting of suitable M.S. Channel with all accessories ,complete in all respects as required at site as per CPWD specifications. Design ambient condition : a) air temperature 50 deg C, b) Relative Humidity 90 % Max, c) Seismic Zone as per location of site, d) Altitude as per location/site. The transformer should have QR code which should contain drawing, test report OEM manual, GeoTag of manufacturing location, rating plate as per relevant IS Code etc. All testing shall as per relevant IS Code. Noise level Shall not exceed limits as per NEMA TR-1 with all accessories running measured as per IEC 551 / NEMAstandard. Fitting and Accessories : The following fittings shall be provided:- a) Two earthing terminals with the earthing symbol b) Rating and terminal marking plates; c) Thermometer pocket with cap; d) Lifting lugs for the complete transformer as well as for core and winding assembly; e) Bi-directional flat rollers (for transformers above 200 kVA); f) HV side neutral grounding strip (where one of the HV bushing terminal is connected to earth); g) Arcing horns or suitable rating lightning arrestors for HT side – 3 Nos. for transformers up to 200 kVA; h) Bird guard; i) Jacking pads (for transformer above 1 600 kVA); j) Name Rating & Diagram Plate. k) Monogram Plate.i) Additional neutral separately brought out on bushing for earthing. Note : The permissible total losses value shall not exceed by 15% the losses as mentioned below.

1600 KVA (losses at 50% loading < 3970watt, losses at 100% loading < 11300watt) Level 5

Laying of the 3.5 core × 300 sq.mm 300 SQMM cable in existing cable trench/tray/ducts/surface including dressing, clamping, tagging, and minor civil works

Laying of 3.5 core × 300 sq.mm PVC insulated and PVC sheathed / XLPE power cable of 1.1 KV directly underground including excavation, fine sand cushioning (100 mm), protective brick covering (full size), refilling & compacting of earth

Supplying and making end termination with brass compression gland and aluminium lugs for following size of PVC insulated and PVC sheathed / XLPE aluminium conductor cable of 1.1 KV grade as required 3½ X 300 sq. mm (70mm)

Supplying and making end termination with brass compression gland and aluminium lugs for following size of PVC insulated and PVC sheathed / XLPE aluminium conductor cable of 1.1 KV grade as required3½ X 70 sq. mm (38mm)

Supplying and fixing 8 way, single pole and neutral, sheet steel, MCB distribution board, 240 V, on surface/ recess, complete with tinned copper bus bar, neutral bus bar, earth bar, din bar, interconnections, powder painted including earthing etc. as required. (But without MCB/RCCB/Isolator)

Supplying and fixing 63amp, four pole, 415 V, isolator in the existing MCB DB complete with connections, testing and commissioning etc. as required.

Supplying and fixing 5 A to 32 A rating, 240/415 V, 10 kA, "C" curve, miniature circuit breaker suitable for inductive load of single poles in the existing MCB DB complete with connections, testing and commissioning etc. as required.

Earthing with copper earth plate 600 mm X 600 mm X 3 mm thick including accessories, and providing masonry enclosure with cover plate having locking arrangement and watering pipe of 2.7 metre long etc. with charcoal/ coke and salt as required

Supplying and installing following size of perforated Hot Dipped Galvanised Iron cable tray (Galvanisation thickness not less than 50 microns) with perforation not more than 17.5%, in convenient sections, joined with connectors, suspended from the ceiling with G.I. suspenders including G.I. bolts & nuts, etc. as required. Installation of cable tray on wall/floor/ceiling including supports, clamps, fixing hardware, and alignment Supply and fixing of cable tray covers (if applicable) Supply and installation of cable ladder support brackets, clamps, and hangers (GI/MS) Painting of cable tray system (if GI/MS, unless powder coated) with 2 coats of anti-corrosive paint Testing and inspection of installed cable tray system including straightness, alignment, and load test (if applicable) 600 mm width X 75 mm depth X 2.0 mm thickness

Design, Fabrication, Supply, Installation, Testing and Commissioning of floor-mounted cubicle-type LT Distribution Panel suitable for 415V, 3-phase, 4-wire, 50Hz system with the following configuration:

Design, Fabrication, Supply, Installation, Testing and Commissioning of floor-mounted cubicle-type LT Distribution Panel suitable for 415V, 3-phase, 4-wire, 50Hz system with the following configuration:

Incoming:

- 1 No. 800A, 4P MCCB/ACB Breaking Capacity 50kA, Adjustable, Suitable for 415V

- Digital Multifunction Meter Measures V, A, PF, kWh, with RS485 output

- Phase Indication Lamps (R-Y-B) LED type, 22.5mm panel mount

- CTs and Control Wiring Tape wound CTs, Cu control cable 1.5 sqmm

Outgoing:

- 8 Nos. 100A, 3P MCCB Breaking Capacity 25kA, Thermal-Magnetic

- 2 Nos. 200A, 3P MCCB Breaking Capacity 36kA, Adjustable Trip

Busbar:

- 1000A TPN Aluminum/Copper busbars, 35kA for 1 sec Supported on DMC insulators, Heat shrink sleeved

Digital Multifunction Meter

Foundation/Grouting for panel (including base frame, anchor bolts, civil support as required)

Testing, commissioning and demonstration of full functionality of the panel and Supply of GA drawing, SLD, test certificates, warranty documents, and O&M manuals

Supply of 3.5 core × 300 sq.mm XLPE insulated, aluminium conductor, steel FRLS armoured, PVC sheathed, 1.1 kV grade power cable conforming to IS:7098 (Part-1)

Supply and installation of route markers and cable identification tags (GI/Aluminium) at every 15 metres, turning points, and joints

Supply of 3.5 core × 70 sq.mm XLPE FRLS insulated, aluminium conductor, steel armoured, PVC sheathed, 1.1 kV grade power cable conforming to IS:7098 (Part-1)

Supply of Chemical Earthing Electrode assembly with GI pipe electrode (25 mm dia × 3 m length), complete with porous pot, filler chemicals (charcoal, salt, Bentonite, or approved chemical compound), and GI clamps as per IS 3043 Excavation of pit for chemical earthing electrode including backfilling with chemical compound and proper compaction Supply and laying of GI Earth Strip/Conductor (40 mm × 6 mm) from chemical earth electrode to main earth bus bar Supply and laying of GI Earth Wire 8 SWG for earth continuity conductorConnection of chemical earth electrode to earth bus with GI clamps, nuts & boltsTesting and commissioning of chemical earthing system using earth tester/megger and submission of test report

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