REPAIR/MAINT OF 33 KV SF 6 BREAKER, TRANSFORMER AND TESTING OF 33 KV GRID SUB STATION AT OLD CANTT ALLAHABAD UNDER GE (EAST) ALLAHABAD

Amount

Routine testing of 33 KV assets by power Grid Corporation of UPPCL or authorised representative of manufacturer to be tested are as under:- (a) Transformer 33/11 KV 02 MVA - 01 No. (b) -do- but 1.6 MVA - 02 Nos. (A) Tests to be carried out :- (i) IR Value test of both transformer and bushings. (ii) PI value tests for 20 seconds and 120 seconds. (iii) No load current test. (iv) Magnetic balance test. (v) Short circuit test. (vi) Testing of tap changer. (vii) Tan/delta test of transformer. (viii) Dielectric strength of transformer oil. (ix) Dissolved gas analysis test. (x) Earthing test (B) 33 KV SF 6 breaker (03 Nos) - Tests to be carried out by the power grid corporation of UPPCL protection team or authorised representative of manufacturer, following tests shall be carried out :- (i) IR Value both in open and close position. (ii) Continuity of breaker in closed position. (iii) Tripping and closing of breaker.

(vi) Functioning of all the tripping system/relays displayed on the control relay panel, such as differential O/C, earth fault , metering circuits and all other protection emanating from transformer- oil temp trip, winding temp gauge trip, buchloz relay, inter trip etc, calibration of all the relays and complete VCB for time obserbed with respect to time set primary injection of all the CTs complete all as specified and directed. (v) Greasing/oiling of all the moving parts. (vi) Operation/working of charging motor and limit switch. Testing of under 11 KV, VCB breaker - 08 Nos and 02 Nos bus couplers through Power Grid corporation of India UPPCL. The equipment s to be tested through protection team UPPCL are as under :- (A) Following test to be carried out on each breaker (Nos of breaker- 12 Nos) :- (i) IR value for open/close circuit- fault relay, over load earth fault relay etc. (ii) Tripping and closing time in M/S. (iii) Operation - both manual and through motor. (iv) Functioning of indicators.

(vi) CT ratio through primary injection. (vii) Polarity test. (viii) Testing of all the protetion relay i.e O/C, eath fault, instantaneous, trip suspention, and auxiliary relay etc, calibration. (ix) Operation/working of charging motor and limit switch. (x) Calibration of all relay , male , female contacts of VCB. (xi) Earthing. (C) Testing of control and relay panel for 33000volt/11000 volts transformer 2000 KVA & 1600 KVA- 03 Nos. (D) Testing of 36 KV, 31.5 KA current transformers - 4 set. (E) Testing of 36 KV, 31.5 KA Potential transformers - 3 set. (F) Testing of 36 KV , 31.5 lightening arrestor expusion type 100 KA discharge- 04 sets. (G) Testing of vaccume circuit breaker Incomer 630 Amps - 3 Nos. (H) Testing of vaccume circuit breaker Outgoing feeder 630 Amps - 5 Nos. (J) Testing of bus couple 630 amps - 03 Nos. (K) Testing of fuse set unit 33 KV- 03 Nos. (L) Testing of line Isolator switches- 08 Nos.

Supply and fixing in replacement closing coil 24 volts of SF6 breaker at 33 KV grid, including making connection and testing on completion all as specified and directed.

Supply and fixing in replacement tripping coil 24 volts of SF6 breaker at 33 KV grid, including making connections and testing on completion all as specified and directed.

Supply and filling sulfur hexafloride gas (SF6) in SF 6 breaker to maintain pressure as recommendede by the manufacturer, including replacement of rubber seal and testing on completion all as specified and directed.

Disconnecting taking out air break switch, gang operated switch HT 33 KV triple pole horizontal/vertical type , mannually operated for repairing and service mounted on insulator, and steel frame with operating mechanism worked from GL, including refixing after repairing by replacement of new spares it required and servicing, including operating handle , each pole consisting of galvanised steel base , HT insulator , non ferrous knife & spring load contacts, arching horns of adequate section and other accessories upto 200 Amps rating complete all as specified and directed. Note : New spares shall be measured and paid seperately as supply only under respective item of Sch 'A'.

Supply only the following components/spares of 33 KV gang operated switch complete all as specified and directed. Make :- Jaipuria brothers.

Female contact or moving contact blade, heavy duty andhigh conductive metal complete capacity 200/400 amps.

Male conatct or moving contact blade, heavy duty andhigh conductive metal complete capacity 200/400 amps.

Tinned copper flexible jumper 200/400 amps

Fix top/bottom contact suitable for 33 KV drop out fuse

Supply and fixing following items in replacement suitable for 33 KV busbar connection/HT system complete all as specified and directed for following :-

Tee clamps heavy duty

Pad connector heavy duty

PG clamps heavy duty

Univeral conmnector heavy duty

Compression type connector for stud type heavy duty terminal.

Dismantling and taking out unserviceable fuse carrier tube from existing DO fuse unit and supply and replace new fuse carrier glass tube with metal fitting on both ends in same DO fuse unit 33 KV complete all as specified and directed.

Dismentling and taking out existing damaged /defective 33 KV post insulator, supply& replacement of new 33 KV post insulators complete all as specified and directed.

S&F in repair for four in series disc type insulator porcelain vitreous 145 cm height and 255 mm dia ball and socket type brown colour for working pressure 33 KV complete all as specified and directed.

S&F in repair pin type insulator porcelain , vitreous, white, brown or green including one galvanised mild steel spindle, two galvanised iron washer and one galvanised iron nut, 260mm height , 290mm dia for 33 KV electric pressure complete all as specified and directed.

S&F in repair lightening arrestor suitable for 33 KV grade , non linear resistance type complete with all fittings transmission class for outdoor discharge capacity 10 KA incl all clamp, nuts and washers with connections and earthing complete all as specified and directed.

Taking out stone aggregate from sub station and refilling evenly (Not less than 80mm thickness) for neat look surface and filled up in low patches with scraped soil to give even and neat look surfaces by removing/uprooting all vegetation hedges shrubs at sub stations complete all as specified and directed.

M&L for painting of transformer 33/11 KV 1.6 KVA of one coat with heat resistant grey colour paint with spray gun incl surface preparation complete all as specified and directed.

M&L for painting of transformer 33/0.433 KV 25 KVA externally with one coat heat resistant grey colour paint with spray gun incl surface preparation complete all as specified and directed.

M&L for painting of outdoor SF 6 breaker 33 KV with one coat of synthetic enamel grey colour paint and iron structure with aluminium paint with spray gun incl surface preparation complete all as specified and directed.

M&L for painting of outdoor CT 33 KV with one coat of aluminium paint with spray gun incl surface preparation complete all as specified and directed.

M&L for painting of outoor 3 phase PT 33 KV externally with one coat of synthetic enamel grey colour paint and iron structure with aluminium paint mwith spray gun complete incl surface preparation complete all as specified and directed.

M&L for painting of outdoor drop out fuse set 33 KV with one coat of aluminium paint with spray gun complete incl surace preparation complete all as specified and directed.

M&L for on line Dehydration of HV/EHV grade transformer oil including filteration using automatic centrifuging machine minimum three cycles to achieve dielectric strength 40 to 60 KV breaking capacity at 2.5mm gap by absorbing and abolishing all sludge particles as per BS-66-1963 including topping up with new transformer oil as required complete all as specified & directed. Note- (i) Centrifuging Machine with all T&P & testing machine of oil required for dehydration shall be arrange by contractor. (ii) Oil required for topping up the transformer will be measured & paid separately as supply only under respective item of this Sch.

Supply and filling in replacemt transfor oil in transformer. Note : Sealed container only will be brought at site with minimum BDV 45 KV complete all as specified and directed. Make :- Transol, Power, Savita.

Inspecting, servicing and testing all mechanical & electrical parts and the connections of control wiring availability of proper DC supply and AC supply, incoming and outgoing connections and tightening them, cleaning the contacts and terminal with CTC solution and using the blower for dusting testing it for satisfectory operation raising and lowering mechanism in presence of engineer-in-charge complete all as specified and directed.

Disconnection of all electric connection and taking down old defective unserviceable 11 KV potential transformer (PT) 3 phase , dry and draw out type 11 KV/110 volts with suitable V A burden per phase accuracy class 0.5 complete with HT & LT HRC fuses for primary and secondary in vacuum circuit breaker (VCB) , complete all as specified and directed. Note :(i) All the instruments and T&P required for the above jobs shall be arranged by the contractor at site without any extra cost to the govt. (ii) The all above checking , inspection, installation and testing work shall be performed by auth HT expert engineer of manufacturer.

M&L for replacement of multi function panel meter of VCB with new digital LCD display meter with accuracy .5 to measure 3 phase current , voltage, frequency , PF, KWH, KVA phase wise and total with provision of RS 232/RS 485 alongwith optical metering complete with connection and testing complete all as specified and directed. Make : Secure model No. Premier 100 or equivalent model in make : AE/HPL/L&T

Taking out existing unserviceable relay, S&F with necessary alteration in panel if required and connection numerical based 3 phase over current and earth fault IDMT relay with instantaneous function complete all as specified and directed. Make : Model MC61CNX of L&T or equivalant of Areva/alstom/C&S. Note :- (i) All the instruments and T&P required for the above jobs shall be arranged by the contractor at site without any extra cost to the government. (ii) The all above checking , inspection, installation and testing work shall be performed by auth HT expert engineer of manufacturer.

Disconnecting 33 KV supply and disconnecting the defective limb/pole of the SF6 breaker, S&F including calibration of new pole/limb of SF6 breaker. Make :- Crompton/Areva.

M&L for provn of chemical earthing with copper earth plate electrode of size 900x600x5mm thick buried directly in ground vertically to a depth not less than 4 mtr below normal ground level ,connected to copper strip of size 32x6mm as earth lead by means of bolts,nuts and washers made out of copper or tinned brass and protection GI pipe of 40mm dia all as specified and testing complete including earthwork,PCC 1:2:4 type B1 (using 20mm graded stone aggregate) as in chamber,RCC 1:2:4 type B1(using 20mm graded stone aggregate) as in chamber cover duly reinforced of with 8mm dia TMT bar 75mm C/C with handle .GI watering pipe 20mm dia ,GI funnel with wire mesh,magnesium sulphate ,salt,charcoal,lugs etc and method of earthing shall be as per plate No :3 of SSR part -I. Note : The chemical and quantity used should be (i) Charcoal- 200 Kg (ii) Salt - 250 Kg (iii) Magnesium sulphate crystal- 75Kg (iv) The copper plate and copper strip should be connected using nut, bolts as well as brazed (v) The earth pit should be min 1200mm width.

S&F copper strip of size 20x3mm fixed to wall complete all as specified as directed.

Opening Dismantling the transformer of capacity 1600 KVA/2000 KVA by lifting the top cover taking out the HV leg coil and LV leg coil and draining out the transformer oil in barral including cleaning the transformer chamber (body) inside and out side throughly with emery paper and cloth than checked the winding and other worn-out parts such as HV/LV coils and other connected items as Tap-changer, breather assembly, bush etc and replacement of new spares i.e. tap changer, bush etc, HV/LV coil rewinding with DPC enamelled copper wire/ strip of adequate size, guage and number of turn complete and connected to existing serviceable strip by jointing with soldring and reinsulation with cotton tape over strip including using insulating material like varnish to limb coil fire proof type and sleeves etc by drying and baking of Insulating material in heating chamber in adequate temprature reassembling the transformer HV/LV connection with help of soldering.Testing of transformer after reassembly complete on No load at workshop and ON load at site incl painting to the transformer with super enameled Heat resistant paint all as specified anddirected. Note -(i) Tap changer, bush will be measured and paid separately as supply only under respective item of Sch 'A'. (ii) M&L for winding of HT/LV coil with DPC enamelled copper/aluminium wire of existing size & guage including insulation, drying baking shall be measured and paid separately under respective item of Sch 'A'. (ii) Distribution transformer shall be got repaired from authorised work shop of Manufacturers or any other works shop which have authoristaion from UPPCL for repair of such capacity transformer. (iii) Following test shall be conducted before installation & commissioning on site. (iii) Following test shall be conducted before installation & commissioning on site. (a) Insulation Resistance Test (by 5000 V megger) (b) Ratio Test (c) Double voltage & double frequency Test (d) Transformer oil value BDV test (e) Tap changing test off load for all tap position

M&L for rewinding of burnt HV/LV coil of transformer with DPC enamelled copper wire/strip of existing size & guage incl insulating material complete all as specified and directed .

M&L for rewinding of burnt HV/LV coil of transformer with DPC enamelled aluminium wire/ strip of existing size & guage including insulation material complete all as specified and directed .

Supply only HV bush Insulator complete with rod as per existing material & size and nut suitable for indoor/outdoor type transformer 1600 KVA .

Supply only HV bush Insulator complete with rod as per existing material & size and nut suitable for indoor/outdoor type transformer 2000 KVA .

Supply only tap changer for adjusting the voltage with brass parts as per sample of existing for indoor/ outdoor type transformer 2000 KVA all as specified and directed.

Supply only tap changer for adjusting the voltage with brass parts as per sample of existing for indoor/ outdoor type transformer 1600 KVA all as specified and directed.

M&L for filling silica gel in breather of Transformers.

Supply and fixing in replacement fault alarm.

S&F in replacement tap change in progress alarm of transformer.

S&F in replacement emergency stop of transformer.

S&F in replacement strip heater 80/100 W.

S&F in replacement push buttom.

S&F in replacement indicator lamp R Y B.

S&F in replacement of Amp meter 0-30A Anolog type. Make : AE/ENERCON.

S&F in replacement of volt meter 0-40 KV Anolog type. Make : AE/ENERCON.

LUMOS INFRA PVT LTD