| 1 | 11KV HT VCB PANEL
Supplying, and replacement of indoor type floor mounted metal clad, 11 KV VCB single INCOMING cum OUTGOING panel with 1 Nos. VCB, totally enclosed & fully interlocked, horizontal drawout, horizontal/ vertical isolation floor rolling type breaker as per IS 13118, IEC-62271-100 & 62271-200 & 60694, as amended up to date and additional specifications, having capacities as mentioned below, single break, trip free mechanism, Electrically charged and auto/manually closing breaker suitable for use on 11 KV, 3 Phase, 50 Hz A.C. supply with short circuit fault level of 500 MVA, rated Short circuit breaking capacity of 26.3KA for 3 sec and internal arc fault withstand capacity of 26.3KA for min. 1 sec complete with self contained, fully interlocked, rack in and rack out mechanism, air insulated but encapsulated copper bus bars of 630 Amps capacity, breaker featured with mechanical ON/OFF indicator with hand trip device, spring release coil, shunt trip coil and auxiliary switch of 4 NO+4 NC and equipped with following switchgears and accessories i/c connections suitable for 3 core x 240 sq. mm. XLPE 11 KV cable (cable entry from rear bottom) end termination with heat shrinkable jointing material etc. as required. Vacuum Interrupter, VCB, Panel, Numerical relay, MFM must be of same make for better life cycle optimization.
Note : (i) The Panel Board shall be OEM made only. Franchise made MV Switchboards shall not be accepted.
(ii) Cost of end termination not included in this item.
iii) Panel shall be type tested from NABL/CPRI/ERDA/ ASTA/ DEKRA/KEEMA/PEHL Alabs i/c Seismic Compliance Zone-IV and should be internal are tested AFLR (Front, Lateral, rear) protections as per IEC 62271-200.
INCOMER SWITCHGEAR PANEL
(a) 1 Nos. 630 Amp. VCB, 500 MVA, 26.3 KA/3 sec.
(b) Spring charged motor - 230 V AC
(c) 3 Nos. 11 KV / 110 Volts single phase PT of Class 1.0 accuracy for metering, class 5P10 for protection. and 50 VA burden with 1 No. Voltmeter (0-15KV) digital type, selector switch for voltmeter and protection fuses/ MCB for HT metering upto 12 KV on incomer.PT should be floor rolled type and should not be mounted on the top of the panel.
(d) 1 No. (0-300 A) dual scale Ammeter, digital type with selector switch and 1 no Voltmeter with VSS
(e) 1 No. Microprocessor based numerical relay with O/L, E/F and S/C protection.
(f) 1 No. Set of dual core dual ratio 3 CTs 50/1-1A of 5VA burden and accuracy Class 1.0 for metering and class 5P10 for protection.
(g) Trip circuit supervision relay.
(h) Control switch
(i) Indication lamps for ON, OFF, TCH, Auto trip, R,Y,B indication, spring charging i/c complete connection testing etc as required.
| 1 | Set |
| 2 | Supply, installation, testing and commissioning of following
capacity (continuous loading) BEE 2 Star rated (Corresponding Level as per BIS amended upto date of receipt of tender) , 11/0.433 KV step down, 3 Phase, 50 Hz, Dyn 11 vector group, KNAN [K(K-Class insulating liquid) Natural Air Natural] copper wound transformer (Electrolytic grade 99.9% pure copper, Core made of first grade Cold Rolled Grain Oriented (CRGO) Core grade MOH or better),Dielectric material shall be type -A, suitable for out door/indoor applications with Offload Tap Changer/ On Load Tap Changer (OLTC) ( below 500 KVA offload and above 500 KVA On Load Tap Changer) on HV side having AVR relay and Remote Tap Changer Control (RTCC) for automatic sensing of incoming voltage, automatic operation of OLTC and facility for remote and manual operation of OLTC HV side in range of +5% to - 15% in steps of 2.5%, having cable end boxes on HV side suitable for 3x300 sqmm XLPE cable of 11 KV grade, including bus trunking arrangement on LV side or cable in box as suitable including supplying and laying of copper conductor multicore control cable from transformer to HT breaker/panel for safety tripping, complete with all accessories and safety provisions as per relevant IS 1180 (Part-3) including first filling of filtered dehydrated Synthetic organic Ester oil, i/c supplying and grouting of suitable M.S. Channel with all accessories and transformer shall be confirming to IS : 2026 (Part 1 to Part 5), IS : 1180 (Part-3) and duly ISI Marked and as per CPWD specifications complete in all respects etc as required at site. The maximum flux density in any part of the core and yoke at rated voltage and frequency shall be such that the flux density with +12.5 percent combined voltage and frequency variation from rated voltage and frequency does not exceed 1.9 Tesla. The permissible temperature-rise shall not exceed 40 dg.C for oil and 45 dg. C for winding up to 200 KVA and 45 dg.C for oil and 50 dg. C for winding for above 200 KVA. Inside of tank shall be painted with varnish or liquid resistant paint. For external surfaces one coat of thermo setting powder paint or one coat of epoxy primer followed by two coats of polyurethane base paint shall be used. IS: 1180 (Part 3) shall be referred for paint thickness for normal to medium corrosive atmosphere. For highly polluted atmosphere and special application external paint work shall be as per direction of Engineer-in-Charge.
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. Noise level Shall not exceed limits as per NEMA TR-1 with all accessories running measured as per IEC 551 / NEMA standard. The transformer should have QR code which should contain drawing, test report OEM manual,Geo- Tag of manufacturing location etc. Marking Each transformer shall be provided with rating plate made of anodized aluminum/ stainless steel material securely fixed on the outer body, easily accessible,as per IS: 1180 Part3. The entries on the rating plate shall be indelibly marked. Fitting and Accessories : The following fittings shall be provided:- a) Two earthing terminals with the earthing symbol b) Oil level gauge indicating oil level at minimum, 30 C and maximum operating temperature; c) Air release device (for non-sealed type transformers) d) Rating and terminal marking plates; e) Silica gel breather f) Drain-cum-sampling valve ( nominal size thread, IS 554) preferably steel with plug for three phase transformers; g) Thermometer pocket with cap; h) Oil filling holes having (1 nominal size thread) with cover (for sealed type transformers without conservator); i) Lifting lugs for the complete transformer as well as for core and winding
assembly; j) Pressure relief device or explosion vent above 200 kVA; k) One filter valve on the upper side of the tank (for transformers above 200 kVA); l) Unidirectional flat rollers (for transformers above 200 kVA); m) Inspection hole (for transformers above 200 kVA); n) HV side neutral grounding strip (where one of the HV bushing terminal is connected to earth); o) Buchholz relay for transformers above 800 kVA. p) Arcing horns or suitable rating lightning arrestors for HT side 3 Nos. q) Bird guard; r) Oil temperature indicator and winding temperature indicators for transformers above 200 kVA with suitable tripping mechanism above permissible limit s) Jacking pads (for transformer above 1 600 kVA); t) Additional Neutral separately brought out on bushing for earthing. u) Magnetic oil level gauge (for transformer above 1600 kVA) with low oil level alarm contact; v) Non return valve (for conducting pressure test); w) Pressure relief device or explosion vent x). Monogram Plate y) Inspection cover z). Detachable type radiators with top
and bottom shutoff valve. aa) Oil Conservator with Oil level indicator, minimum level marking and drain plug for all transformers of capacity 50 KVA and above. bb) Necessary hardware, clamps, lugs etc. for termination on HV/MV etc. for all transformers.
315KVA | 1 | Each |
| 3 | Earthing with G.I earth plate 600 mm x 600 x x 6 mm thick including accessories, and providing masonry enclosure with cover plate having locking arrangement and watering pipe of 2.7 meter long etc with charcoal/coke and salt as required. (DSR-2025_5.4) ( for HT panel, LT panel and transformer) | 3 | Set |
| 4 | 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 meter long etc. with charcoal/coke and salt as required. (DSR-2025_5.6) ( for HT panel, LT panel and Transformer) | 3 | Set |
| 5 | Providing and fixing 25 mm x 5 mm copper strip on surface or in recess for connections etc. as required (DSR-2025_5.14) | 45 | Meter |
