ESSENTIAL REPAIR/ RENEWAL OF HT CTs 22 KV, INDOOR/ OUTDOOR BREAKERS, HT MOCBs, VCBs, RMUs AND REPAIR/ MAINTENANCE OF TRANSFORMER, DEHYDRATION/ FILTRATION OF TRANSFORMER OIL AND OTHER MISC WORKS AT NAVAL STATION KARANJA

Amount

Periodical checking / preventive maintenance of HT MOCB 22 KV 800 Amps, 50 Hz 700 MVA yearly 3 times are as under complete all as specified and as directed by Engr-in-charge. (a) Checking the closing and opening operation of MOCB and functional checks and repair/ replacement of the defective components. (b) Overhauling and Calibration of relays (secondary injection/Primary injection on each multiple setting of relays). (c) Setting and coordination of relays. (d) Checking and recording of IR value of MOCB trolley and panel. (e) Checking/repairing/rectification of the control wiring. (f) Replacement of panel heater 80 watt. (g) Replacement of worn out bushing PT/Busbar support insulators (h) Replacement of worn out bushing PT/Busbar support insulators (j) Replacement of unserviceable and Open circuit CT's.

(k) Checking fibre plates, gaskets, transformer oil and applying multi grease to the mechanical parts & dry graphite conductive sealant to contacts of PT etc. & re-assembling the same and commissioning complete to entire satisfaction of Engineer-in-Charge. (l) Testing of polarities of CT's. (m) High voltage testing with high voltage tester of CT & Breaker pole to withstand working pressure of HT 22 KV to ascertain servicieability and spare parts found defective to be replaced for smooth functioning as directed by Engineer-in-Charge. (n) Labour only for Opening the busbar chamber of HT 22KV MOCB panel board cleaning the bus bar chamber, inspect the CT's wiring, spout insulator & bus-bar joints & tightening if required & heating up with hot air blower to remove moisture, meggering, HV testing applying TRTPPEX(B) supplied against Sl Item No 4(b) here-in-after to bus bar & commissioning complete all as specified & directed by Engineer-in-charge.

Notes: (i) All spares required for replacement shall be measured and paid separately under respective item of schedule here-in-after as supply only. (ii) Machine grease, oil, liquid sealant and any minor item costing upto Rs 250 will be included in the unit rate of above item and for satisfactory function of the breakers and no extra cost will be allowed. Decision of accepting officer in this regard will remain final & binding. (iii) The overhauling of HT breakers to be carried out either through OEM's service Engineer/authorised dealer/San & Engg consultant /Triotech consultant/ those who posses HT handling license.

Periodical checking /preventive maintenance of HT VCBs/ RMUs Panel etc., of 630 Amps /800 Amps rating indoor and outdoor type detailed are as under complete all as specified and as directed by Engr-in-charge. Make: ABB/ Arriva/ C&G / Schineder (a) Servicing (i.e light primary terminals) & repair/replacement of defective components. (b) Functional checks. (c) Mechanisum servicing and lubrication. (d) Protection checks (e) Control wiring tightness. (f) Power connection tightness. (g) Insulation measurement of main circuit. (h) Contact resistance of main circuit. (j) Checking the operation of VCB/RMUs panel (k) Overhauling and Calibration of relays (l) Setting and coordination of relays.

(m) Checking and recording of IR value of breaker trolley. (n) Checking/repairing/rectification of the control wiring. (o) Checking the panel heater and replacement of faulty space heater (p) Replacement of the unserviceable / open circuit CT's. (q) Testing of PT and PT circuits. (r) Cleaning the breaker externally and internally thoroughly with lint free cloth (s) High voltage testing with high voltage tester to withstand working pressure HT 22 KV to ascertain servicieability, spare parts found defective to be replaced for smooth functioning Notes: (i) All spares required for replacement shall be measured and paid separately under respective items of schedule 'A' here-in-after as supply only. (ii) The overhauling of HT breakers to be carried out either through OEM's service Engineer/ authorised dealer/ San and Engg consultant / Triotech consultant/ those who posses HT handling license.

Supply only following spare parts required for item No.1 here-in-bofore (Note:- the element of fixing of spare is already included in respective Sl Item No. 1 here-in-before) suitable for MOCB of 800 Amps, 700 MVA all as per sample :-

Spout insulator (Epoxy)

TRTPPX (B) for HT 22 KV for breaker

Current Transformer 22 KV single phase indoor Resin cast CT Ratio 30-15/5-5 Amps Class 1.0 insulation level 28 KV/75 KV as per IS 2075

OLTF assembly suitable for MOCB, 22KV, 800Amps, indoor type

Strip type heater 80 watt

Closing coil

Tripping coil

Control fuse 2 Amps with HRC fuse and fuse holder in existing Make: EE/ Standard/ Havells/ L&T

Insulation Tape suitable for HT 22 KV 1.5" wide. Make: 3M or equivalent.

MOCB oil tank gasket suitable for MOCB 22KV 800 Amps indoor type

Baffle pot assembly suitable for MOCB, 22 KV, 800 Amps, indoor type

Main moving contact bolted/ threaded type suiatable for MOCB, 22KV, 800Amps, indoor type

PT single phase indoor resin cast PT Ratio 22 KV/ R3/ 110V /R3 Class 1.0, 200VA.

HT bushing with spindle

Thermostat - 0-100 Deg. Celcius

Moving contact rod

Upper fix contact

Lower fix contact

Top and bottom male contact

Female contact

Support insulator

Partition fiber plate

Copper strip of 800 Amps (per Kg)

Supply only following spare parts required Sl for item No. 2 here-in-before. (Note:- the element of fixing of spares is already included in respective Sl Item No. 2 here-in-before) for HT VCB/RMUs panel 630 Amp/800 Amp 22 KV:

Current transformer resin cast single phase 22 KV - 200/ 100V, 5-A, Class-1.0, SP-10

Potential transformer resin cast single phase 22 KV /R3 /110V /R3, 200 VA, class-I

O/C and earth fault relay with IDMT and inst charatrostics MC 61 A. Make : L&T 30 Volt DC

Master Trip relay 30v DC 3 NO + 1 NC. Make: Ashida

Digital Amps meter class - 1.0, CTR ratio - 0 to 200/100-5-5A

Numerical O/C & E/F Relay 1/5A (miccom P 111). Make : Areva

Supervision relay 924 volt DC, VAX31248071BM Model

ANNC 12 W facia Annunciator relay

Digital Trivector meter - PTR/ CTR program (EM 6400)

Breaker control switch 25 A non lockable Make: Kaycee

Local remote switch lockable Make: Kaycee

TNC switch Make: Kaycee

Space heater 100 watt Make: Eltec

Thermostate 30 to 100 Degree Make: Girish

MCB 2 pole 10 A - 16 A. Make: Legrand

Limit switch 1 NO+ 1 NC , 15 A 240 Volt. Make: Brisk

22 KV HT insulator resin cast for busbar support

22 KV HT, PT fuse primary

HT insulation tape Make: 3M

22 KV angle boots

22 KV HT slive Make: 3M/ Reycem

Indicator lamp LED type Red, Yellow, Green, Blue, White, Amber, Clear

Current transformer terminal (CATD) Make: connect well/ Elmex

AC & DC Terminal (CST/ CST10) 65 A, 415 Volt. Make: Connect well/ Elmex

Control Terminal (CST/ CST 2.5) 36 A, 415 Volt. Make: Connect well /Elmex

Spring charging motor 230 V AC

Load manager digital 3 phase 4 wire, CL-I , CTR 200-100/ 5-5A, PTR- 22 KV/110V, Male: Conzerv EM 6400

Dismantling top cover alongwith conservator tank for filteration of transformer oil and after draining out transformer oil up to terminal level in situ by dismantling copper bus bars HT /LV bushing and earthing strips, replacement of LT /HT bushing and terminal rod of brass gasket, nuts, bolts and washers etc., refitting top cover and conservator tank after cleaning and filtration, removing the sludge, reconnecting HT/ LT cable/ conductor and earthing strips and filtration of tranformer oil including toping up of transformer oil by adding new transformer oil having 60 KV di-electric strength and charging /testing the transformer on load for transformer of rating upto 160 KVA capacity complete all as specified and as directed by Engr-in-charge. Notes: (i) Contractor should make his own arrangement of filtration plant at each transformer sites for filtration of transformer oil including provision of electric supply to the filteration. (ii) New transformer oil shall be measured and paid separately. (iii) Cost of HT /LT bushing and terminal rod wiil be measured and paid separately. (iv) Filtration of oil will be measured separately. (v) Contractor have to test di-electric strength breakdown voltage before and after filtration of oil and record of the same duly signed by Engr-in-charge and contractor to be kept on record.

All as per item No.5 here-in-before but for transformer of rating 200 KVA.

All as per item No.5 here-in-before but for transformer of rating 250 KVA.

All as per item No.5 here-in-before but for transformer of rating 315 KVA.

All as per item No.5 here-in-before but for transformer of rating 400 KVA.

All as per item No.5 here-in-before but for transformer of rating 500 KVA.

All as per item No.5 here-in-before but for transformer of rating 630 KVA.

All as per item No.5 here-in-before but for transformer of rating 1000 KVA.

Supply only the following spare parts of transfomer 22 /0.433 KV operated in ser item No. 5 to 12 complete all as specified and as directed by Engr-in-charge.

(a) HV Bushings

(i) 22 KV from up to 160 KVA

(ii) 22 KV from 200 KVA to 630 KVA

(iii) 22 KV 1000 KVA

(b) HV terminal rod with nut bolts, caps etc

(i) 22 KV from up to 160 KVA

(ii) 22 KV from 200 KVA to 630 KVA

(iii) 22 KV 1000 KVA

(c) LV Bushings

(i) 22 KV from up to 160 KVA

(ii) 22 KV from 200 KVA to 630 KVA

(iii) 22 KV 1000 KVA

(d) LV terminal rod with nut bolts, caps etc

(i) 22 KV from up to 160 KVA

(ii) 22 KV from 200 KVA to 630 KVA

(iii) 22 KV 1000 KVA

(e) LT Brass connectors

(iii) 30mm

Material and labour for replacement of burned or rusty core with 53 grade imported CRGO material complete all as specified and as directed by Engr-in-charge.

Supply and fix in repairs dial type temprature guage 100mm dia with dual calibration in degree celcius and degree Fahrenheit, range 0 to 100 c and equivalent degree Fahrenheit complete with capabillary tube and sensor suitable for transformer of any rating complete all as specified and as directed by Engr-in-charge.

Supply and filling new transformer oil having 60 KV di-electric strength and conforming to IS for replacement or topping up to oil level mark at the conservator complete all as specified and as directed by Engr-in-charge.

Material for rewinding of transformer core with same numbers /grade of copper enamelled conductor with same size of turns as per manufactures's specification and testing and commissioning transformers after repair complete all as specified and as directed by Engr-in-charge.

Material for reinsulation of copper windings (LT and HT), Class B, with electrical grade insulating kraft paper all confirming to IEC-60554-3-5 (1984) complete all as specified and as directed by Engr-in-charge.

Filteration of transformer oil, in situ, to achieve di-electric strength of the oil not less than 50 KV complete all as specified and as directed by Engr-in-charge. Note: Contractor will submit before and after testing report of transformer oil.

Disconnecting HT /LT and earth termination connections from transformer, taking down the transformers from plinth /platform and loading into the vehicle; transporting the same to workshop for carrying out necessary repairs and back, reconnecting HT/ LT connections at site and charging the transformer on load, commissioning and testing including meggar test at site complete all as specified and as directed by Engr-in-charge.

Draining out transformer oil, dismantling top cover alongwith conservator tank, taking out core assembly after disconnecting connections, rewinding with same size and type of copper conductor and number of turns and insulating material such as paper insulator sleeves, heating etc., Putting back the core assembly into the tank after removing sludge and replacement of HT and LT bushing complete with brass terminal, refixing top cover and conservator including replacement of gasket, nuts, bolts and washers filling new transformer oil having 60 KV di-electric strength and carring out type tests as per IS 2026 in presence of Engr-in-charge for the following capacity complete all as specified and as directed by Engr-in-charge. Notes: (i) New transformer oil and its filling shall be measured and paid separately under relevant items of schedule. (ii) Cost of rewinding material, insulation material and spares of transformer shall be measured and paid separately under relevant item of Schedule. (iii) Replacement of spares will be on required basis.

75 to 160 KVA

200 to 315 KVA

400 to 1000 KVA

Disconnecting HT/ LT and earth termination connections from trolley mounted transformer (500 KVA capacity) and towing the same to a location, within 5 KMs including Material and labour for making of HT/ LT and earth termination connections of the trolley mounted transformer to the existing electric distribution system in indoor /outdoor substation complete all as specified and as directed by Engr-in-charge. Notes: (i) Trolley mounted transformer will be issued to contractor by MES however Contractor has to make his own arrangements of towing vehicle. (ii) The job also includes disconnecting of HT/ LT and earth termination connections of Trolley Mounted Transformer and towing the same to a location as directed by Engr-in-Charge.

Testing of transformers of various capcities installed at various locations at Naval Station Karanja by performing following tests complete all as specified and as directed by Engr-in-charge. (a) IR Value on LV & HV side using 500 V and 5 KV megger respectively. (b) Ratio on all the taps. (c) Magnetic balance tests on LV & HV. (d) Vector group. (e) Magnetizing current. (f) Winding Resistance Test on HV & LV terminals. Notes: (i) Contractor should make his own arragement of testing equipments and electric supply so required. (ii) A detailed test report should be submitted to Engr-in-Charge.

Supply and fix in repairs heat shirnk right angled boots for XLPE 22 KV 120 sqmm cable including dismantling of HT cable from HT side of Transformer / HT breakers complete all as specified and as directed by Engr-in-charge.

Material and labour for heat shrinkable cable end termination joint including jointing kit outdoor type suitable for earthed 3 core 95 /120 sqmm HT 22 KV XLPE aluminium conductor cable and HV test after jointing and connecting up complete all as specified and as directed by Engr-in-charge. Make: Raychem/ XICON/ M-Seal/ Denson

Material and labour for heat shrinkable straight through jointing kit with all necessary jointing material suitable for HT 22 KV XLPE 3 core 95/ 120 sqmm aluminium conductor cable complete all as specified and as directed by Engr-in-charge. Make: Raychem/ XICON/ M-Seal /Denson

Supply and fix in repairs breather assembly with silica gel suitable in situ for transformer of any rating complete all as specified and as directed by Engr-in-charge.

Supply and fix for CRC bottle spray of 500 ml for opening of rusty surfaces and rusty nuts and bolts complete all as specified and as directed by Engr-in-charge.

Material and labour for replacement of self-indicating Orange to Green silica gel granules from transformer breather assembly complete all as specified and as directed by Engr-in-charge.

Material and labour for preparation of old painted surfaces of 100 KVA transformer with scrapers, any number of coats, any width or girth and applying two coats of synthetic enamel paint by spray painting including writing 5mm /MES numbers complete all as specified and as directed by Engr-in-charge.

All as per item No. 30 here-in-before but 160 KVA transformer

All as per item No. 30 here-in-before but 200 /250 KVA transformer

All as per item No. 30 here-in-before but 315 KVA transformer

All as per item No. 30 here-in-before but 400 /500 KVA transformer

All as per item No. 30 here-in-before but 630 KVA transformer

All as per item No. 30 here-in-before but 1000 KVA transformer

Supply and fix in repairs end termination box HV side with cover made of 3mm thick MS sheets including fibre board insulation sheets and including nuts, bolts and washer including painting of steel surfaces with two coats of red oxide zinc chrome primer complete all as specified and as directed by Engr-in-charge.

All as per item No. 37 here-in-before but for LV side.

Material and labour for earthing complete with GI earth plate electrode of size 600x600x6mm thick burried directly in ground (earth pit not less than 2.25m deep below ground level) with top edge of the plate not less than 1.5m below the normal ground level connected with GI strip 32x6mm by means of bolts, nuts, check nuts and washers of galvanished iron steel including necessary excavation and earth work in any type of soil, removing surplus soil to a distance not exc 50m, with and including PCC chamber in PCC 1:2:4, type B1 (Using 20mm graded stone aggregate), mild steel angle iron frame made out of MS angle iron of size 40x40x6mm thick duly painted with two coats of synthetic enamel paint over one coat of red oxide zinc chrome primer hinged with and including 6mm thick CI cover with handle, watering arrangement with funnel internally secured with wire mesh with 40mm dia medium grade pipe for watering 40mm dia light grade, GI pipe for lead protection in and including alternate layers of charcoal dust and common salt complete all as shown in electrical plate No. 03 and connected to earthing test point and indicated including testing on completion including retrieving old GI earth plate, CI cover, GI pipes, angle iron frame from existing earthing complete all as specified and as directed by Engr-in-charge.

Supply and fix for earth continuity conductor or main earthing lead fixed to wall on batten or fixed to pole GI strip 32x6mm complete all as specified and as directed by Engr-in-charge.