Strengthening of High Tension Supply, 2Nos. 630 KVA Transformers, VCB Panel arrangements in Tiruvannamalai Medical college and Hospital

630KVA TRANSFORMER: Supply, erecting, testing and commissioning of 630 KVA, 11KV/433V, OLTC tap changing copper wound outdoor type distribution transformer confirming to IS 1180 - Level 2. (a) HV Bushing terminal arrangements (b) LT cable end box suitable for 4 runs of 3½ x 400 sq.mm LTUG cable. (c) Conservator with shut off valve. (d) Dehydrating Silicagel Breather (e) Conservator drain plug valve (f) Tank drain plug valve (g) 4 Nos. plain rollers (h) Thermometer pocket with thermometer with capillary tubing for maximum reading position (i) Drain plug valve (j) Filter valve (k) Oil filling whole with cap (l) Oil level gauge (m) Two body earthing terminal (n) Rating and terminal marking diagram plate (o) Lifting hooks/Lifting eyes/Jacking pad to facilitate movement to transformer and easy ground level (p) Off load hand operated tap changing switch at stand by height from ground level (q) Tapping on primary winding for voltage variation +5% to -5% (r) Neutral on L.V side to be available for 4 wire supply and brought out for earthing (s) Air release device (t) The transfsormer should be supplied with first filling of oil

(u) All removable covers shall be provided with weather proof hot oil resistance gaskets to prevent leakage of water into core and oil from the tank (Make :VOLTECH/CREL/ROWSONS/ Kirloskar/OEM)

13. Common for Switch gear, MCB's for AC DC Control, Heater ON/OFF Switch with space Heater and thermostat Single phase switch socket, cubicle illumination lamp, Disconnecting type terminal Block.etc., 14. The SS used should not be less than 2mm Thick. 15.Incoming and outgoing switch gears as per IS 13118:1991 of VCB, IEC 62271-100 For breakers and 200-for Panels /IS 3427 of switch Board. 16.24v/30v DC Shall be provided through 2 nos SMF Batteries of 12/15V of minimum 26AH Capacity with battery charger as per recommendation of the manufacturer both for protection as well as indications.

Supply and clamping of 11KV 3 core 240 sq.mm XLPE HT UG cable in Wall or the existing trench in HT Room. (From FP VCB to T/F1 & T/F2, Existing FP VCB)

Supply and Fixing of a cable tray with proper arrangements.

Design, supply, erection, testing and commissioning of 1250A cubicle type, single front, floor mounting Main LT panel with the size of 19'x7'x4' made out of 14SWG MS sheet enclosure with copper busbar, single busbar system, cable chamber, interconnection, painting, earthing, protection relays etc. comprising of the following switches: Incomer -1&2 (EB Side) 1250Amps 4Pole 50kA electrical draw out type C Power Air circuit breaker with shunt release shutter assembly, door interlock and other accessories.- 2 Nos Instruments Panel Providing ON/OFF switch, emergency lockable push button, Demand controller with RS485, Ammeter, Voltmeter, MD Controller, Earthfault relay, CTs, control MPCB/MCB/ ELCB/RCBOs, RYB Indication lamps and “ON/OFF/Trip" indicating lamp, Class "B" surge protection device with control fuses etc. and also refer the specification and SLD. Bus coupler :1250Amps 4Pole 50KA electrical draw out type Air circuit breaker with shunt release shutter assembly, door interlock and other accessories - 1 No. Outgoing: 630A 50KA TPN SFU Switch – 4Nos 400A 50KA TPN SFU Switch – 4Nos With necessary copper busbars, interconnections, ""ON,OFF & TRIP"" indication lamps, providing digital type multi function meter / Ammeter (only APFC feeder) with RS485 and necessary CTs, control MCB/MPCB/RCBOs etc. in all outgoing feeders and all as per the relevent standards. Both the incomers (EB & DG) and buscoupler should be electrically & mechanically interlocked as per the interlocking table. Also it shall be suitable for the automatic power transfer from anyone source to other and all other as per the enclosed SLD and specification. Incoming feeder MDC / MFM should have the facility to monitor Harmonic THD and individual harmonic display+ Regular parameters like V, I, KVA, KVAR, KW,

KWH, KVARh, PF, Freq, Max, AVG etc. All Outgoing Feeders in Main LT panel shall be with MFM monitoring V,I, KWH, KVARH, PF with RS 485 BMS integration. All the metres to be wired and terminated at common metre chamber / marshalling feeder of each panel section. Panel should be having following specifications: i) All panels incoming breaker and including outgoing breakers of only MPCC panel, irrespective of the rating should be provided with microprocessor based over current, time adjustable short circuit and earth fault releases (LSIG). ii) All MCCBs (except the above point) up to 250A should be provided with adjustable thermal & magnetic type and all the above rated breakers should be provided with microprocessor type and MCB shall be C-curve except UPS outgoing circuits which should be provided with D-curve MCBs with minimum of 10kA short circuit rating. iii) All panels should be complied with the standard IS 8623 / IEC 60439. (PTTA) iv) The current density of aluminium shall be of 0.7A/sqmm and 1A/sqmm for copper v) All breakers should have minimum kA rating as mentioned in BOQ. On non availability of specified breaker, immediate higher rating breaker must be provided. vii) All live parts should be shrouded by FRP transparent polycarbonate sheet of 2mm thick.

viii) Surge Arrester to be provided in all panel's incoming feeder and the same should be connected to the main earth grid directly. All panel should have Class-B+C type SPD except MPCC panel which should be provided with Class B type SPD. ix) All panel's bus bar should be capable of either withstanding continuous rated Amps rating or to withstand the fault current for 1Sec., whichever is higher. x) All meters shall be digital type. All panels incoming feeder should have Multi function meter with RS 485 for monitoring the parameters like VLL, VLN, AMPS, HZ, PF, KW KVA KVAR, KWH KVAH KVARH, ITHD, VTHD, RUN HOUR, Max, Avg. etc... xiii) Form 4A construction should be followed for all the panels

Supply and clarnping of 4 runs of 3-1/2 x 400 sq.mm. PVC LTUG armoured cable on post or on wall with MS clamps.

Supply and clamping of 19 core 2.5 sqmm XLPE armoured LTUG copper cable on post or on wall with MS clamps. (Tr to MV Panel)

Supply and laying of 4 runs of 3 1/2 X400 Sq.mm PVC LTUG armoured cable into existing cable trench and covering the trench with existing slab and making good of the same.

Supply and fixing of brass cable gland for 3-1/2 x 400 sq.mm. PVC armoured LTUG cable with earth connection.

Supply and providing cable end termination of 3-1/2 x 400 sq.mm. PVC LTUG aluminium armoured cable with necessary aluminium cable sockets by crimping etc with electrical connection complete.

Supply and providing cable end termination suitable for 11KV 3 core 240 sq.mm XLPE(E) HTUG cable.

Supply and clamping of 3-1/2 x 240 sq.mm. PVC LTUG armoured cable on post or on wall with MS clamps.

Supply, fixing and demonstration of the following safety accessories and tools: Safety Accessories for 11 KV-substation AC chargeable emergency lamp 2x11w PL lamp lamp with all connected accessories.Rubber Mat 1m X 2m - 5 Nos.First Aid Box-3 Nos,shock treatment chart fixed in glass frame, 4 Fire Bucket 40x40x6mm ms angle with stand -3 Set. Hand Gloves in glass frame- 4 Nos. (2 pair) .Metallic danger board as required by the electrical authorities Fire Extinguisher-DCP- 5 Kg’s - 6 Nos. Earth Discharge Rod-1 No

Preparation of site plan, physical layout, electrical line schematic diagram 10 sets, getting drawing approval from CEIG, preparation of completion report, rectification report, etc., and arranging CEIG inspection and obtaining safety certificate from CEIG, payment of CEIG inspection fees and preparation of one set approved drawing and copy of safety certificate in a neat frame work and like fixed as HT substation.

Servicing of Existing HT 11 KV Vacuum Circuit Breaker / Load Break Switch completely, by removing all the fixed Male, Female contacts and Moving Male and female contacts, removing all the carbon and making the surface of the contacts clean, re-fixing them and applying necessary petroleum Jelly for the contacts and lubricating the other mechanical parts for easy operation, etc., complete.

Supply and fixing of HT Metering box made of 16SWG CRCA Sheet steel as per TNEB / IER specification with earth connection on suitable masonry plinth for the TNEB DP pole structure / tapping pole complete with armoured copper cable from HT CT coil box, 2.5 sq.mm PVC unsheathed SC copper conductor of 1100V grade 4 colours Red, Yellow, Blue and Black 15 Mtrs each with termination kits for M.R.T use, copper holders complete as required for TNEB HT side metering as instructed by the site officers complete with painting of suitable color.

Copper plate Earthing as per the ISI specification with an earth electrode of 2.1 Mt class 'B' GI pipe of dia not less than 40mm, with copper earth plate of size 600mm x 600mm x 3mm, with necessary funneling arrangements with necessary masonry work and with 38mm RCC cover slab for the brick masonry.

Supply and run of 25mm x 6mm tinned copper flat with necessary clamps / supports on wall / floor / ground for earth connection.

Supply and fixing of 10mm thick Chacker plate of Suitable size at each floors of electrical room and HT Room.

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