Repair Maintenance of VCBs RMUs Distribution Transformers HT electrical distribution system including repair calibration of relays meters and other allied works at INS Dega under AGE EM II of GE U I Visakhapatnam

Amount

Excavation in trenches, not exc 1.5 m wide and not exc 1.5 m in depth; for foundation, etc. or for shafts, wells, cesspits, manholes, pier holes, laying cables etc. n exc 10 sq m on plan and n exc 1.5 m in depth and getting out all excavated material in soft / loose soil complete all as specified and directed.

Returning, filling in and including spreading, levelling, watering and well ramming in layers not exceeding 25 cm thick complete all as specified and as directed.

Removing of excavated surplus soil to a distance n. exc 50 m and depositing where directed at a level n. exc. 1.5 m above the starting point complete all as specified and directed.

M&L sand cushioning with clean and dry sand in trenches for protection of UG cable and including punning down complete all as specified and directed. Note:- Punned thickness shall only be measured and paid.

Supplying and laying un-reinforced precast concrete cable cover, class HV, Type 1, flat, of size 300mmx 180mm x 40mm, laid along alignment of cable as protection to cable in trenches complete all as specified and directed.

S&F 100 mm bore galvanised steel tubing, medium grade with necessary fittings, laid under road crossing, for cable protection including taking down complete all as specified and directed. Make - Tata / Jindal Steel / Surya Roshni Ltd. / Bhushan Power & Steel Ltd. / M/s APL Apollo Tubes Ltd

M&L cable jointing kit for 11 KV (Earthed) grade 3 core XLPE armoured aluminium conductor cable of size 120 to 185 sqmm for outdoor termination, heat shrink type joint complete with jointing material and accessories including taking down complete all as specified and directed. Note:- (i) The cost of Disconnecting and reconnecting the cable with HT network is deemed to be included in the unit rate quoted against this item. (ii) The cost of re-arranging the cable if needed is deemed to be included in the unit rate quoted against this item. Make:- 3M / Denson / Raychem

All as per Sl Item No. 7.00 but suitable for cable of size of 240 to 300 Sqmm

M&L cable jointing kit for 11 KV (Earthed) grade 3 core XLPE armoured aluminium conductor cable of size 120sqmm to 185 sqmm for straight through, heat shrink type joint with jointing material and accessories including taking down complete all as specified and directed. Note:- (i) The cost of excavation is deemed to be included in the unit rate quoted against this item. Make:- 3M / Denson / Raychem

All as per Sl Item No. 9.00 but suitable for cable of size of 240 to 300 Sqmm

Supply & laying XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cables (heavy duty) with aluminium conductor, 11000 volts, Earthed, grade cross sectional area 240 Sqmm, 3 core, laid in trenches / duct / on pole including taking down existing cable complete all as specified and directed. Make :- Havells / KEI / Polycab / Gloster / Finolex

All as per Sl. Item No. 11.00 above but for cable of size 185 sqmm x 3 Core

M&L for detecting HT / LT UG cable faults located in any stretch / depth with sophisticated cable fault locator consisting of microprocessor based pre-locator system, HV surge generator, fault pin point surge wave receiver, cable identification instrument , cable tracer for exact location of under ground cable routes complete all as directed. Note:- The rate quoted deemed to be inclusive of arrangement of necessary fault locator equipment, transportation of equipment & charges for service engineer.

M&L for repair and servicing of HT (HT 11 KV) two pole structure by replacing Aluminium PG clamps, GI bolts and nuts, pieces of ACSR conductor with insulation sleeve RYB of any size as jumpers including lubricating the moving parts of AB switch and cleaning of all disc and pin insulators and applying silicon compound for prevention of arcing due to dust/ salt deposits over the surfaces including preparation of surfaces, applying zinc chromate primer on rusted surfaces and applying one coat of aluminum paint to the entire structure complete all as directed. (Note:-Rate quoted shall be inclusive of two coats of white wash on exposed concrete surfaces.)

Earthing complete with Galvanised Steel Earth Plate Electrode 600 X 600 X 6 mm thick burried directly in ground [earth pit not less than 2.25 m deep below ground level] with top edge of Plate not less than 1.50 m below normal ground level connected to 32 X 6mm GI Strip [Earth Lead] and GI pipe 40 mm, Medium Grade for earthing lead protection to the extent of maximum 7.5m, Earth Plate Electrode surrounded by 150mm thick packed layers of Charcoal and Common Salt filled in alternate layers, connected to the Plate by means of GI Bolts & Nuts complete all as per Electrical Plate No. 3 of SSR Part – I, connected to panel / DB including testing on completion including main earthing, Charcoal, Common Salt, PCC [1:2:4, Type B1] Pit with RCC 1:2:4, Type B1 Cover, 50 mm thick with 6 Nos, 8 mm dia TMT bars in both ways, MS frame made with 40 X 40 X 6 mm Angle Iron, MS Funnel with 20 mm bore, medium grade GI Watering pipe, wire mesh, earth work excavation, return filling, removal of surplus soil etc. including taking down of existing earthing set complete all as specified and diredted.

S & F following spares of GOD 11 KV grade, 200 Amp rating in position as in repairs including testing after repairs

Male contact

Female contact

Tinned copper flexible jumper

MS Jumper carrier

Back connector plate

Disconnection of the Distribution Transformer from HT and LT supply mains, removing of Bus duct and Bus bar, Leakage arresting to 100 kVA to 750 kVA capacity transformers by draining out of oil, after arrangement of necessary empty oil drums, buckets etc., dismantling of top cover and accessories, dismantling of LT bushings by disconnecting leads/jumpers from inside, replacement of gaskets and oil seals and re fixing of the LT bushings, making internal and external connections, replacement of cover gasket and accessories, refixing of accessories and cover, filling of transformer oil complete, and making cable connections and for energising the transformer.complete all as specified and diredted. (Cost includes materials like gaskets and oil seals and labour, the Bushing and bushings rods to be measured and paid separately).

Disconnecting the HT/LT connections of 100 kVA to 750 kVA capacity transformers i.e (Bus duct / Cable bunch) keeping all the cables out from the HT/LT sides, physically checking the transformer for healthiness, performing the transformer tests like Meggar test, Ratio Test, Magnetic Balance test and short circuit tests for checking the condition of transformer complete and test results shall be submitted by the contractor.complete all as specified and diredted. Note:- (i) If the transformer found satisfactory then HT/LT connections shall be done by the contractor and has to charge the transformer. (ii) If the transformer fails in these tests then the contractor has to shift the transformer for winding /overhauling. (iii) Cost of Transportation / winding / overhauling is exclusive of rate quoted by the contractor.

Shifting the 100 kVA to 750 kVA capacity Transformer from existing site to another site within 3 Km distance range by Dismantling of HT and LT cables, jumpers and bus bars including LT busbar cable boxes and close the transformers for loading in to Vehicle with the help of crane, transportation to another site, unloading, cable connections both HT and LT, testing and commissioning.complete all as specified and diredted.

M&L for replacement of Silica gel breather assembly complete with breather unit and silica gel including connecting with proper necessary gaskets if necessary, including removing the unserviceable breather assembly of 100 kVA to 750 kVA capacity Transformer.complete all as specified and diredted.

M&L for replacement of Conservator tank complete unit and including connecting with proper necessary gaskets if necessary, including removing the unserviceable Conservator tank of 200 kVA to 750 kVA capacity Transformer.complete all as specified and diredted.

M & L notice plate of 1.6 mm thick mild steel sheet vitreous enameled white, with letters figures and conventional skull and bones in signal red colour and fixed with MS clamps bolts and nuts of approved size for HT 11 KV of size 25 x 20 cm complete all as specified and diredted.

M & L for disc insulator porcelain vitreous brown 145 mm height & 225 mm dia ball and socket type two in series assembly with cast aluminium 4 U bolt tension hardware and tension clamps for conductors working pressure HT 11 KV complete including dismantling old one all as specified & directed.

M & L for pin insulator porcelain vitreous brown insulator including one galvanised mild steel spindle two galvanised iron washers and one galvanised iron nut for 11000 volts grade 150 mm dia & 150 mm height, complete including dismantling old one complete all as specified and diredted.

Supply and install HT 11 KV, 200 Amp outdoor type gang operated single break switch Tilting type vertical/ Horizontal mounting consisting of hot dip galvanised channel iron base having 2 Nos 11 KV Post type insulator in stack and 3 stack per phase copper or copper alloy high pressure heavily tinned contacts plated MS arcing horns capable of breaking the magnetizing current complete with horizontal connecting bar GI pipe as down rod levers coupling & operating handle with locking arrangement complete all as specified and diredted.

Supply and replace Porcelain LT Bushings alongwith bushing rod made out Brass/Copper of suitable length/size all as per existing, complete of 100 KVA to 750 KVA capacity distribution transformers of any make/size/type all as directed including dismantling old one.complete all as specified and diredted.

Supply only Porcelain HT Bushings alongwith bushing rods made out Brass/Copper of suitable length/size all as per existing, complete the 100 kVA to 750 kVA capacity distribution transformers of any make/size/type all as directed including dismantling old one.complete all as specified and diredted.

M&L for disconnecting carefully electrical connection from both HT/ LT (primary & secondary) sides of the transformer, keeping them at safe side and taking out the transformer/Voltage stabiliser indoor/ outdoor type of capacity 500 KVA to 750 KVA, 11 KV/433KV, step down any make for carrying out complete overhauling which shall comprise of the following:-

(a) M&L for lifting, transporting, handling the transformer to workshop and back to the original location after complete overhauling. (b) Conducting the tests on core and windings as per IS like ratio, magnetic imbalance, short circuit etc. in presence of Engr-in-Charge and test results shall be signed both by the contractor and Engineer -in-Charge and kept on record. Note:- (i) Any damage to insulators/ bushes/ windings etc. while in the custody of the contractor shall be made good at no extra cost to Department. The serviceability of the transformer shall be checked and confirmed by the contractor before taking into his custody. (ii) M&L for rewinding/ re-insulation of HT/ LT (primary/ secondary) coils, bushes, studs, Transformer oil, cable box, replacement of bucholtz relay/ MOG if any etc will be measured and paid separately.

All as per Item No. 28 herein before but transformer/Voltage stabiliser indoor/ outdoor type of capacity up to 250 KVA to 400 KVA

All as per Item No. 28 herein before but transformer/Voltage stabiliser indoor/ outdoor type of capacity up to 100 KVA to 200 KVA

Filtration of transformer oil of transformers/ FRMUs installed at various locations to achieve di-electric strength not less than 60 KV at 2.5mm gap as per relevant IS with portable filtration plant, testing of the oil for the di-electric strength before filtration and after filtration complete all as directed by the Engineer-in-Charge.

Supply and topping up of transformer oil with di-electric strength not less than 60 KV in to the conservator tank/ body tank of the transformer/ OCB/ FRMUs etc at various locations complete all as directed by the Engineer-in-Charge. [Make: Power oil/ Transol/ Sabitha Chemicals]

M&L for rewinding of distribution (HT/LT) transformers of capacity ( 500 KVA to 750 KVA)/ type by winding the defective coils with new copper wire as per I.S. of same gauge and existing size together with new insulated materials/ bracings before placing in to the transformer and assembling the coil with new insulation and fitting the coils in the chamber, testing and commissioning the transformer and recording the test results complete all as directed. [Note: M&L for re-insulation of serviceable coils will be measured & paid separately under relevant items.]

M&L for rewinding of distribution (HT/LT) transformers of capacity ( 100 KVA to 400 KVA)/ type by winding the defective coils with new copper wire as per I.S. of same gauge and existing size together with new insulated materials/ bracings before placing in to the transformer and assembling the coil with new insulation and fitting the coils in the chamber, testing and commissioning the transformer and recording the test results complete all as directed. [Note: M&L for re-insulation of serviceable coils will be measured & paid separately under relevant items.]

M&L for re-insulating windings of HT/ LT distribution transformers of capacity ( 100 KVA to 750 KVA) / size/ type by strip opening of HT/ LT coils (i.e. Primary/ secondary coils) from core assembly safely, unwinding the HT/ LT coils (i.e. Primary/ secondary coils) complete, removing the old defective insulation paper and replacing with new DPC insulation to the copper conductor, re-varnishing of the windings with super varnish including heating/ drying/ backing complete carefully and thoroughly inside the heating chamber at suitable temperature to obtain required value of insulation resistance etc. all as per IS 1986-87 and as directed by Engr-in- charge.

M&L for replacement gun metal drain valves of transformers of 200 kVA to 750 kVA capacities including dismantling old gun metal valave complete all as specified and diredted. MAKE :- UPADHYAY/ LEADER/ ZOLOTO

Supply and fix in repairs off load tap changer assembly suitable for any make with 7 tapping position including opening top cover, conservator etc of 400 kVA to 750 kVA capacity Transformer complete all as specified and diredted.

Supply and replacement of (WTI) Winding Temperature Indicator of 400 kVA to 750 kVA capacity distribution transformers including dismantling old one complete all as specified and diredted.

M&L for replacement of Oil gauge glass with gaskets of 400 kVA to 750 kVA capacity distribution transformers of any make/size/type all as directed including dismantling old one.complete all as specified and diredted.

M&L for preparation of old painted surfaces of 500 kVA to 750 kVA capacity transformers with coarse cloth/ brush and painting throughout externally on exposed surfaces with two coats of smoke grey colour synthetic enamel paint including writing of transformer details on plinth in white enamel paint on black enamel paint back ground complete including one coat of white wash for base foundation all as specified and directed by Engineer-in-charge.

M&L for replacement of (OTI) Oil Temperature indicator of 400 kVA to 750 kVA distribution transformers including dismantling old one.complete all as specified and diredted.

M&L for replacement of Drain plugs to valves/conservator caps of the sizes 3/4", 1", 1.5" valves and plugs of the 100 kVA to 750 kVA capacity distribution transformers of any make/size/type all as directed including dismantling old one.complete all as specified and diredted.

Clearing of bushes/small plants up to root level around and surroundings areas E/M installations (i.e.Two Pole/ Four structures, outdoor-substation yards & Misc E/M installations etc) including surface dressing n.exc 15 cm deep and removing debris to a distance n.exc 50m in complete all as directed

Supply and lay Graded coarse aggregate of size 20 mm dia size upto height of 0.15 Mtr over 0.1 Mtr of sand cushioning in outdoor sub-station yards including surface dressing n.exc 15 cm deep and removing debris to a distance n.exc 50 m before laying of sand all as directed. Note : Punned thickness will be measured and paid separately for sand.

Servicing,Inspecting,checking,overhauling,cleaning by using of blower, Lubrication ,greasing and carrying out preventive maintanance of RMU capacity 11 KV, 250/350 MVA including calibrating the relay by conducting secondary injection tests and RMU in serviceable condition, testing and commissioning all as specified and as directed by the Engineer-in-Charge. Notes: (i) The rate quoted shall be deemed to include for necessary T&P, nuts, bolts, washers, gasket, insulation tape, compound, painting of RMU panels with approved colour including lettering details all as per exisitng etc.

Supply & fixing of the following parts of RMU (Make : Schineider)

Self powered relay with O/C , S/C , E/F protection.Relay should have a front USB port for laptop interface , LCD display ,10 event records, 5 fault records, min 2 setting group and keypad for setting parameters for the relay- 1No

CT having Ratio 100-50/1-1A for Class - 1.0, 2.5VA for metering and Class 10P10, 2.5VA for protection- 1Set

Cable termination bushing suitable for upto 1 RUN 3Cx185 Sq mm, XLPE cable- 1Set

Cable termination cover boots (Push on type) -1Set

Three Phase (R/Y/B) indicating lamps - 1Set

11KV/230V AC, 1KVA control transformer - 1No

Battery and battery charger, 12Ah, (I/P-230V AC, O/P - 24V DC) - 1No

Spring Charging motor

S & Install drop out lift OFF HT 11 KV, 200 Amp fuse link consisting of channel iron base having 2 Nos 11 KV post type insulators in stack & 2 stack per phase complete with fuse carrier of SRBP tube with heavily tinned non ferrous metal parts and spring loaded phosphor bronze contact complete manufactured as per IS 9385 complete all as specified and diredted.

M & L for Painting of VCB with Si-Coat 570 RTV Silicone High Voltage Insulator coating solution prior to cleaning the complete paint surface with silica paper , blower, heat blower.complete all as specified and diredted.

Supply, Install, Testing and commissioning of Mi-Com Feeder Protection and Control Relay, Kw, KVA, PF, Hz, Kwh, 12 DI + 10 DO, One front RJ45 Port, One Rear RS485 Port for Modbus Protocol, Draw out Type with CT Shorting feature, Small LCD Display feature including taking down old relay of any description complete all as specified and as directed. [Make: ABB /Siemens/Schneider]

Supply & fixing in replacement of Lightning arresters 11KV grade expulsion type complete with all fittings, station class, discharge capacity 65 kilo amp complete all as specified and diredted.

Supply and fixing following spares suitable for 250 MVA to 450 MVA HT switch gear VCBs and 11 KV HT panel repair work under relevant Schedule:-

CTs epoxy cast wound primary CTs with minimum primary current 50 to 100 A, double ratio, double core (Protection core-5P10 & Metering core- Class 1.0), 25 KA for 1 sec of 15 VA minimum Burden.

Supply only 1.5 sqmm flexible PVC stranded copper conductor cable, unsheathed, 1100 V grade for control wiring.

Supply only 2.5 sqmm flexible PVC stranded copper conductor cable, unsheathed, 1100 V grade for control wiring.

LED Indication Lamps

Shunt trip coil 110 V DC/220 V DC

Shunt trip coil 110 V DC/220 V DC assembly

Breaker control switch

Busbar Spout

Circuit spout

Control circuit fuses 2 A to 63 A

HRC fuse (PT HT side)

PT plug contact

Multifunction meter, Digital type (Displaying A, V, PF, Hz, KVA, KW, KVAR, KWh, Karsh etc.) Class 1/0.5 with RS485 port for communication in Modbus protocol. Make : L&T, Conzerve, HPL (SOCOMEC).

VCB buffers

110 Volt DC closing coil assembly

Push to trip knob red assembly

Push to trip knob green assembly

Ratchet wheel

Nylon release lever

VCB charging powl

Shutters for racking shaft

Bus bar support insulator for VCB panel

Vaccume Interrupter Bottle VG2 Make : Schnider/Areva

Rectifier

M&L for replacement of damaged space heater in HT VCB 11 kv with new one suitable to operate on 110 Volts DC supply complete with necessary wiring and control cable with toggle switch and all as directed by engr-in-charge.

Thermostat

Disconnect and taking out the IDMT/ Numeric/ Microprocessor based relay of any type of any Make from 11 KV HT panel at INS DEGA, cleaning the contacts, calibrating the relay by conducting secondary injection tests, checking of current transformer, rectification of defects in control wiring for proper tripping of circuit breakers through CTs and relay and tripping coils, adjustment/setting to plug and time multiplier settings of the relay to achieve the discrimination in tripping, tune/synchronise upstream breaker relay settings, re-installation of relay, testing & commissioning etc complete all as specified and as directed. Note: The Contractor has to arrange necessary testing Kits, testing equipments, tools etc. Rental rates for the testing/calibration kits & connected equipments are deemed to be included in the quoted rate. Testing & tuning shall be carried out in the presence of representative of the Department, to the satisfaction of the Department.

Taking down HT switch gear (Vacuum circuit breaker ) at INS DEGA of capacity 11 KV 250/350 MVA comprising of repairs, complete overhauling/servicing, carrying out preventive maintenance alongwith testing of breakers by current injection test and refixing the same after repairs/ overhauling: Note: (i) The servicing includes for busbar duct chamber, cable alleys and connecting accessories (ii) The rate quoted shall be deemed to include for necessary T&P, nuts, bolts, washers, gasket, insulation tape, compound, painting of VCB panels with approved colour including lettering details all as per existing etc. to put in to the VCBs and panels in serviceable condition, testing and commissioning all as specified and as directed by the Engineer-in-Charge. (iii) Major spares like Breaker bushings, vacuum interrupter assly, busbar spout, busbar spout connections, circuit spout/circuit spout connections/buffer fixed contacts, moving contacts, tank assly/barriers, solenoid spares, dependent/spring mechanism/ motor mechanism, trip unit etc will be measured and paid separately under relevant items of Schedule 'A'. However the rate quoted shall be deemed to include for any other minor spares require replacement. (iv) The servicing shall be carried out by Auhtorised service centre as approved by GE

M & L for HT tape for the insulation of the HT lugs,boots and sleeves.

M & L for CRC (WD-40) bottle 500 ml for cleaning the accessories and getting the moisture out.

UV POWER TECH (BID ID -3255192)

PNR CONSTRUCTIONS (BID ID -3255140)

M.V.K.ENTERPRISES (BID ID -3253115)

P NARAYANA RAO (BID ID -3248650)