PROVN OF EXTERNAL WORKS SERVICES FOR VERTICAL WIND TUNNEL AT AF STN AGRA

Supply, installing, testing and commissioning outdoor type, Energy efficient Power Transformer, step down transformer, 33/11 KV,3 phase, 50 Hz Cycle, 3.15 MVA (3150 KVA), core type copper wound, oil immersed, naturally cooled, Oil natural, air natural (ONAN),complete with first filling of IS-335 ISI marked filtered and dehydrated transformer oil and other standard fitting/Accessories and 17 position on load tap changer (OLTC) (Tapping range +5%to -15% in steps of 1.25% Each) with remote tap cubical changer (RTCC) panel and automatic voltage regulator (AVR) DYN-11 (Vector Group). The Max voltage ratio HV/LV (36Kv/12Kv). Over voltage operating capability and duration 112.5% of rated voltage. Anticipated continuous loading of HV/LV continuous 110% rated current. HV power frequency (KV RMS)- 70. LV Power frequency (KV RMS)- 28. HV Impulse with stand voltage (KV peak) : 170 KV. LV Impluse with stand voltage (KV-75). The maximum temperature rise should not exceed 45 degree Celsius in oil and 55 degree Celsius in HV/LV winding when measured by resistance method after continuous full load run on an ambient temp. Standard IS :2026 with Copper wound and oil die electric strength more than 60 KV. Maximum no load loss in 3 Kw at rated voltage and frequency and maximum load loss in 17 KW at 75 deg celcius rated voltage and frequency . Load losses at rated Current & 75 Degree Celsius . Impedance - 6.25% complete all as specified and directed. The factory testing before dispatch of transformer will be carried out as nominated by Accepting Officer comprising of the following and including the base Plinth as per manufacturer recommendation :-

Contd item No 1 (a) On Load Tap Changer (OLTC) (b) Remote Tap Charger Control (RTCC) panel, Control & Relay (CR) panel alongwith indication panel and showing all necessary parameters of Transformer (c) Automatic Voltage Regulator (AVR). (d) Termination at 33 KV side outdoor bushing. Termination at 11 KV side -cable box and accessories. (e) Buchholz Relay double float type (having contacts for alarm and trip) alongwith suitable size of copper cable from Buchholz relay to control panel. (f) OTI (having contacts for Alarm & Trip) alongwith suitable size of copper cable upto control panel. (g) WTI (having contacts for Alarm & Trip) alongwith suitable size of copper cable upto control panel. (h) Marshalling box (having TTB only). (j) Oil conservator with filter type drain valve and oil level guage. (k) Dehydrating breather with first fill dehydrating agent (silica gel). (l) Explosive vent (m) Thermometer pocket on tank cover (n) One No 100 mm dia, dial type thermometer, vapour pressure type having range 0-120 degree Celsius with metal guard having maximum perimeter reading temperature indicator with resisting device for transformer. (o) Two earthing terminals. (p) Rating plate and terminal marking plate. (q) Oil level gauge. (r) Oil drain valve with plug. (s) Lifting lugs (t) Oil filling hole with cap/plug with connecting plate complete (u) Air release valve plug (v) Removable inspection opening on Top Cover.

Contd item No 1 (w) Bidirectional CI rollers. (x) Arching Horn set (only for HV bare Bushing type Transformer). (y) Pressure relief valve (PRV) (having contact for Alarm & trip) (z) Hooter and protection relay for Buchholz Relay of suitable capacity and class at Remote panel. (aa) One danger notice board having conventional danger sign of skull with bones in painted in red colour. For OLTC (a) Earthing Terminal - 02 Nos (b) Lifting eye bolts - 03 Nos (c) Air Release plug (d) Window for tap Number (e) Oil drain cum filtering valve with plug. (f) Oil filling cum filtering valve with plug. (g) Conservator with oil filling hole with cap silica gel breather. (h) Removable manual crant handle to operated OLTC (i) Removable inspection opening with cover. (j) Oil surge Relay. Make – Crompton Greaves / ITE / ABB/ ......../- Note : Following points are to be considered for selection of Transformer manufacturer. (i) The core shall be considered shall be constructed from high grade, non ageing, prime grade CRGO with M-4 grade or better, silicon steel laminations. (ii) Manufacturer should have in house own NABL accredited laboratory. (iii) The drawings of transformer marshlling box, RTCC, OLTC etc shall be got approved from GE. (iv) All tests shall be carried out at factory before the dispatch of Transformer inspection of officer as detailed by Accepting Officer. (v) Control wiring upto CR panel in Main Power house. Rate of Control and Relay Panel suitable for 33/11 KV 3.15 MVA Transformer should be deemed to be included in the quoted rate. (vii) Manufacture warrenty should be 05(Five) years from the date of commissioning.

Contd item No 1.02 (viii) Rates are deemed to be for the construction of platform for 3.15 MVA transformer, construction of RCC transformer foundation of size 3.00 m × 3.00 m (minimum or as per OEM drawing) including excavation in all types of soil, PCC 1:4:8 bed, RCC foundation in M20 grade concrete with reinforcement, foundation depth 0.70 m below ground level and pedestal height 0.90 m above ground level, embedding of MS channels ISMC-100 – 4 Nos for mounting of transformer, alignment, leveling, properly grouted, painted with anti - corrosive coating and all associated civil works as per approved drawings, curing and finishing complete as per approved drawings and directions of Engineer-in-Charge. including dismantling and removal of existing/old platform, as directed by Engr-in-Charge. ix) Manufacturer should have valid certificate (Not older than 5 years) of same rating & higher rating with same voltage class, from NABL/CPRI accredited laboratory. x) In case of any fault or failure of the transformer during the warranty/defect liability period, the contractor shall be fully responsible to arrange and install a temporary replacement transformer of the impractical and rating within 24 (twenty-four) hours at site to ensure uninterrupted power supply. xi) The rent/hire charges of the temporary transformer, including transportation, installation, operation and removal, shall be borne entirely by the contractor until the original transformer is repaired, tested, and reinstalled in healthy working condition at site, to the satisfaction of the Engineer-in-Charge, at no extra cost to the department.

Supply and install HT 33 kV 3 Phase 50 cycles totally enclosed metal clad SF6 switch gear Out Door type having rupturing capacity up to 350 MVA , Over load and earth fault protection, Ammeter, voltmeter and of rating up to 630 Amps,. Class of breaker C1-M2,rated voltage 36 kV, insulation level (Kvp) 1.2/50 micro second pulse with stand voltage of 170kV, maximum permissible switching suitable for system over voltage conditions as per IEC standards. Operating mechanism spring charged, No of trip coils- two nos common for 3 pole, each having the capacity to trip all three pole successfully, trip coil and closing coil voltage 110V DC / 220V DC. The auxiliary supply voltage shall be 85% to 110% of the rated 110V DC / 220V DC in supply for closing coil and the same shall be 70% to 110% for tripping coil. The operating voltage for motor operated spring charged mechanism shall be 400V AC, 3phase, 50Hz or 230V 1-phase, 50Hz. The motor shall operate at a voltage of 85% to 110V of the supply voltage (a) Two No 110V DC / 220V DC tripping coil (b) One No 110V DC / 220V DC closing coil (c) One No spring charged motor suitable for 230 volts AC supply or 415 V AC. (d) Mechanical on/off indicator showing spring charged and spring free position. (e) One set of mechanical trip and close lever (f) one set of cable terminal block located at safe distance inside the box for control cable. (g) One set of cable entry glands for control cables. (h) Crank for manual charging spring (j) One 80 watt 230 volts AC 1-Phase, 50 Hz space strip heater with thermostat and switch. (k) One No local and remote operation switch. (l) One 1.6 mm thick CRCA sheet fabricated factory made, cubical panel, powder coated outdoor type for the circuit breaker, totally enclosed, floor mounted comprising of:- (i)Auxiliary switch with four No and four NC contracts as recommended by the manufacturer (ii) Operation recording meter mechanical (iii) Manual / auto and local remote arrangement (iv) 02 Nos earthing terminals. (v) Other accessories as provided by the manufacturer complete all as specified and directed.Make - Crompton Greaves / ABB / Schneider

Supply, Installation, Testing and commissioning of remote control panel for 33 kV, 3 Phase, 50 Hz outdoor SF6 type tested indoor type made out of 2 mm thick CRCA sheet duly powder coated internally and externally complete with all interconnecting with CT, PT ,VCB by suitable size of copper control cable and comprising with the following accessories: (a) Accessories like local remote selector switch, Trip neutral close (TNC), space Heater with Thermostat, DC & AC Control Ckt through MCB, indicating LED lamps for RYB Phases, Spring Charged, DCV Supply helath Breaker ON/OFF, Breaker in service, Test Disconnected position. (b) Multifunction meter, Digital type (Displaying A, V, PF, Hz, kVA, kW, kVAR, kWh, kVARH etc) Class 0.5 with RS 485 port for communication of Modbus protocol. (c) SCADA compatible numerical Non-Directional IDMT four pole (3 O/C + 1 E/F) with instantaneous over current and earth fault protection with high set Feeder Protection Relay -01 NOS .(d) Auxiliary relay scada compatible for Buchholz, WTI, OTI alarm and trip separately -02 nos ( e) Annunciator complete with showing type of fault , accept/reset button with minimum 12 windows and suitable for auxiliary supply voltage 110 volt.-1NO (f) Under voltage single phase /Over voltage relay– 3 No (h) Trip Circuit Supervision Relay (TCS) – 1 No (j) Digital independent Volt meter and ammeter of suitable ratings- 01 each (k)Auxiliary Supply Voltage for the Relay/Close/Trip coil 230 V AC, 1-Phase complete all as specified and directed. Make :- Crompton Greaves / ABB / Schneider Note for item No 3 -The above Remote control panel shall be combined together to form one composite panel All control wiring ,connection internal& external, including up to UPS/ Battery bank panel & any item electrical & mechanical not mentioned but technically required & essentially required is deemed to be included in above item quoted rate .

Supply, erection, testing & commissioning current transformer of 33 KV single phase, outdoor type 3 core CT of ratio 100/50/5-5 Amp with suitable burden 15VA ,Insulation level 70 kVp/170KVp as IS:2705 & class of accuracy complete with associated terminal box connecting link etc as per relevant ISS and as required. ( for Main incoming) complete all as specified and directed.

Supply, erection,testing & commissioning 33 kV/110 volts outdoor type single pole potential transformer oil immersed and self cooled PT ratio 33KV/rt3/110V/rt3/ class 0.5-3, burden 50VA, insulation level 70 kVp/170 kVp, confirming to IS-3156 . 01. For Main incomer, 02. For 33 kV bus of 33/11kV Transformers) complete all as specified and directed.

Material & labour of 33 kV Lightning arrester, station -class, gapless tyoe , metal oxide (znO) surge arrester suitable for outdoor installation on 33 kV side of substation or on pole structure. The lightening arrester shall conform to IS:3070 or IEC 60099-4 and be rated for continuous operation at system voltage. The arrester shall have Nominal voltage 33 kV, maximum continuous operating voltage 27-28 kV rms, rated discharge current:10 kA, Pressure relief device and insulation coordination suitable for use in high fault current environment , creepege distance minimum 850 mm complete with galvanized mounting brackets, terminal connectors, base plate, and earthing clamp and necessary GI strip complete including taking down old unserviceable lightening arrester complete all as specified and directed.

Supply, installation, testing and commissioning of gang operated air break switch 33 kV, 200 Amp outdoor type triple pole suitable for horizontal mounting type suitable for manual operation from ground level, triple pole, double break suitable for horizontal mounting consisting of hot dipped galvanized steel channel base having 3 nos 33 kV post top insulator per phase complete with copper contact element, MS flat, copper blade, bearing assembly etc and suitable GI pipe of 40mm dia galvanized medium grade pipe as down rod lever between coupling bar and operation handle with locking arrangement at both ON and OFF position suitable for 33 kV system having earth link system comprising earth switch indicator and auxiliary switch complete all as specified and as directed.