REPAIR / MAINT OF DISTR TRANSFORMERS, HT ELECT DISTR SYSTEM, VCBS, RMUS, REPAIR / CALIBRATION OF RELAYS, METERS INCL AND OTHER ALLIED WKS AT INS DEGA UNDER AGE E/M NO-II OF GE(U-I) VISAKHAPATNAM

Amount

NOTES / INSTRUCTIONS FOR STRICT COMPLIANCE :- (a) The contractor shall obtain sample approval for all materials incorporating in the work as per condition 10 of IAFW-2249 and Special Condition 11 of tender document mentioned here-in-after. (b) The Engineer-in-charge may direct the contractor in writing to procure and deposit up to 50% quantity of the material with in 30 days from the date of commencment as required at site out of quantity to complete the scope of work. Remaining 50% shall be procured as per site requirement during progress of work.The decision shall be final and binding on the contractor. (c) The contractor shall deposit the procured material to the store of concerned subdivision within 30 days from the receipt of written direction. Failing which contractor shall liable to pay a penal recovery of Rs. 5000/- per week, levied on the dues of contractor, subject to maximum up to 10% of the work done/CA Amount whichever is higher. (d)The contractor shall obtain approval of “Qualified Tradesman” as per condition 26 of IAFW-2249 before commencement of work at site and shall have sufficient manpower such as Electrician / FGM / Technician etc., readily available to meet the site requirement during emergency situation as per directions of Engineer-in-Charge. (e) The quoted rates shall be inclusive of cost of necessary Tools, Plants, Safety Equipments, Machinery etc., as per site requirement.

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 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 rever sand in trenches for protection of UG cable and including punning down complete all as specified and directed. Note:- Punned thickness of sand coushioning shall only 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 including taking out existing un-serviceable cable covers complete all as specified and directed.

S&F 100 mm bore dia galvanised steel tubing, Light grade galvanised, laid under road crossing, for cable protection or fixed to poles, walls or laid under floors including taking down existing un-serviceable pipe of any description complete all as specified and directed.

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 end termination, heat shrink type joint complete with jointing material and accessories including taking down existing joint 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.

All as per Sl item No. 8.00 here in before but for cable of size 240 to 300 sqmm

M&L cable jointing kit for 11 KV (Earthed) grade 3 core XLPE armoured aluminium conductor cable of size 120 to 185 sqmm for straight through, heat shrink type joint with jointing material and accessories including taking down existing one 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.

All as per Sl item No. 10.00 here in before but for cable of size 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 185 Sqmm, 3 core, laid in trenches / duct / on pole / on wall including taking out existing unserviceable cable complete all as specified and directed.

All as per Sl item No. 12.00 here in before but cable of size 240 sqmm

M&L for detecting HT 11 KV 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 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 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 specified and as directed. Note : Rate quoted shall be inclusive of two coats of white wash on exposed concrete surfaces of structure.

M&L earthing complete with galvanised steel earth plate electrode of size 600 x 600 x 6 mm thick buried directly in ground in vertical position (earth pit not less than 2.25 m deep below the normal ground level) with top edge of the earth plate not less than 1.5 m below normal ground level, connected to earth lead of galvanised iron strip 32 x 6 mm by means of bolts, nuts, check nuts and washers of galvanised iron or steel, all as shown in electrical plate No. 3 connected to earthing test point including dismantling un-serviceable earthing complete all as specified and directed. Note:- The unit rate shall also include for earth work in any type of soil, PCC 1:3:6 type C1 chamber, RCC 1:1.5:3, type A1 cover slab, 50 mm thick reinforced with 8 mm dia TMT bar @ 140 mm C/C both ways, 10 mm dia plain bar lifting handle embedded in cover slab, Main earthing lead from earth electrode to test point upto 7.5 m length, 20 mm bore medium grade GI watering pipe, 40 mm bore GI medium grade earth lead protection pipe, funnel, wire mesh, copper lugs, charcoal and common salt in alternate layer etc.

S&F Male contact suitable for GOD 11 KV grade, 200 Amp rating & of make as per OEM including taking down existing un-serviceable male contact complete all as specified and as directed.

S&F Female contact suitable for GOD 11 KV grade, 200 Amp rating & of make as per OEM including taking down existing un-serviceable Female contact complete all as specified and as directed.

S&F Tinned copper flexible jumper suitable for GOD 11 KV grade, 200 Amp rating & of make as per OEM including taking down existing un-serviceable Tinned copper flexible jumper complete all as specified and as directed.

S&F MS Jumper carrier suitable for GOD 11 KV grade, 200 Amp rating & of make as per OEM including taking down existing un-serviceable MS Jumper carrier complete all as specified and as directed.

S&F Back connector plate suitable for GOD 11 KV grade, 200 Amp rating & of make as per OEM including taking down existing un-serviceable Back connector plate complete all as specified and as directed.

Disconnection of the distribution transformer of capacity 100 to 750 KVA from HT and LT supply mains, removing of Bus duct and Bus bar, leakage arresting 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, reassembling of acessories and cover, filling back of existing transformer oil complete and making cable connections and assessing for energising the transformer complete all as specified and as directed. Note: (i) The rate quoted shall include cost of materials like gaskets and oil seals and labour etc. (ii) Bushing and bushing rods shall be measured and paid separately.

Disconnecting the HT/LT connections of transformer of capacity 100 to 750 KVA 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 HV/LV Meggar test, Ratio Test, Magnetic Balance test and short circuit tests for checking condition of transformer complete all as specified and as directed. Note:- (i) All testing shall be carried out in presence of Engr-in-Charge or his accredited rep and test reports shall be signed by contractor and Engr-in-Charge and kept on record. (ii) If the transformer found satisfactory then HT/LT connections shall be carry out by the contractor and has to charge the transformer. (iii) If the transformer fails in these tests then the contractor has to shift the transsformer for winding /overhauling which will be measured and paid separately. (iv) Cost of winding / overhauling if required shall be measured and paid separately.

Shifting the Transformer of capacity 100 to 750 KVA from existing site to another site within 3 Km distance range by Disconnecting of HT and LT cable connections, jumpers and busbars including LT busbar cable boxes and closing the transformers for loading into transporting vehicle with the help of crane of suitable capacity, transportation to another site, unloading, cable connections both HT and LT, testing and commissioning complete all as specified and as directed.

M&L for replacement of silica gel breather assembly complete suitable for 100 to 750 KVA transformer as per existing with breather unit and silica gel including connecting with proper necessary gaskets if necessary & removing the unserviceable breather assembly complete all as specified and as directed.

S&F conservator tank assembly suitable for transformer of capacity 200 to 750 KVA as per existing and including connecting properly with gaskets if necessary including taking down existing un-serviceable conservator tank assembly complete all as specified and as directed.

S&F danger notice plate of size 25 x 20 cm & 1.6mm thick mild steel sheet, vitreous enameled white, with letters, figures and conventional skull and bones in signal red colour and fixed with M.S. clamps, bolts and nuts of approved size for HT including taking down existing un-serviceable notice plate complete all as specified and as directed.

S&F Disc insulator porcelain vitreous brown 145 mm height & 255 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 including taking down existing un-serviceable insulator complete all as specified and as directed.

S&F 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 including taking down existing un-serviceable insulator complete all as specified and as directed.

S&F switches air break, gang operated triple pole, mechanically operated, mounted on insulator and steel frame, with operating mechanism worked from ground level, for current rating upto 200 amps, 11000 volts all as per clause no 19.69 of SSR part-I (2009) including taking down existing un-serviceable gang operated switch complete all as specified and directed.

S&F LV bushings made out of porcelain along with bushing rod made out of Brass / Copper, as per existing and suitable for distribution transformer of capacity 100 to 750 KVA including taking down existing un-serviceable Bushing & Bushing rod complete all as specified and as directed.

S&F HV bushings made out of porcelain along with bushing rod made out of Brass / Copper, as per existing and suitable for distribution transformer of capacity 100 to 750 KVA including taking down existing un-serviceable Bushing & Bushing rod complete all as specified and as directed.

M&L for disconnecting carefully electrical connection from both HT/ LT (primary & secondary) sides of the transformer, keeping them at safe side and taking the transformer / voltage stabiliser, indoor/ outdoor type of capacity 500 KVA to 750 KVA, 11 KV / 0.433 KV, step down any make out from the plinth with the help of crane for carrying out complete overhauling which shall comprise of the following:- (Contd...)

a) M&L for lifting, transporting, handling the transformer to workshop and opening top cover of the transformer by unscrewing nuts, bolts, washers etc. including disconnecting core assembly from HT/ LT bushing and lifting the same gently and taking out from the shell (container/ body) of the transformer. b) M&L for draining out transformer oil from the above said transformer in the suitable capacity of container / drums and keeping it in safe custody for reuse. c) M&L for cleaning the transformer body from inside, removing deposited dirt / sludge / foreign particles etc. from the bottom / body of the transformer with appropriate chemical solution and drying up the shell from inside before refilling of the transformer oil. d) M&L for cleaning and washing thoroughly core and windings of the transformer by hosing down with clean dry oil conforming to IS 335/1983, removing deposited dirt / sludge / foreign particles from the windings / core, thorough inspection of windings, providing insulations to leads and terminals, heating / drying / baking complete carefully and thoroughly inside the heating chamber at suitable temperature to obtain required value of insulation resistance etc. all as specified and as directed by Engr-in- charge. e) Lifting and re-fixing core assembly inside the transformer shell gently and carefully, connecting primary / secondary / Neutral connections to the bushings assembly, fixing of tap change over including tightening of nuts, bolts, washers of the core to reduce humming noise all as directed. f) Refilling the filtered transformer oil in the shell of transformer complete. g) Re-fixing the top cover including replacement of cork sheet / gasket 8mm thick, tightening of nuts / bolts / washers etc. and replacement of breather with silica gel crystal type all as directed by Engr-in charge h) Lifting / shifting to the place from where removed or to any location as directed and re-installing the transformer including connecting primary / secondary / neutral connections etc. all as directed by Engr-in-Charge. (Contd...)

j) The inspection of transformer shall involve:- i) Checking of all clamps, nuts, bolts including core bolts & cover fixing bolts. ii) Checking all brazing, joints, tap heads and connection joints. iii) Checking all jumpers, terminations / connections inside the transformer. iv) Checking the Buchholtz relay / conservator MOG if any. v) Painting complete with two coats of synthetic enamel paint externally transformer shell complete all as directed by Engr-in-Charge. (vi) Inspection of tap changer, checking the moving and fixed contacts for contact wear and connection to winding. k) 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 buchholtz relay / MOG if any etc will be measured and paid separately. (iii) Necessary gate pass duly signed by all concerned i.e JE, Engr-in-Charge & contractor should be taken while lifting / before taken in to costody of contractor foe handling workshop for repair. (iv) Guarentee / warrenty of the existing transformer to be verified by the Engr-in-Charge before lifting the equipment for repair. (v) Serviceable transformer Oil shall be duly certified by the Engr-in-Charge. (vi) Engr-in-Charge shall satisfy with serviceability of Transformer. No extra cost will be allowed for rectification of defect till expiry of defect liability period once carryout repairs of the transformer measured under this item.

All as per Item No. 33.00 to 33.02 here in before but transformer / Voltage stabiliser indoor / outdoor type of capacity 250 to 400 KVA

All as per Item No. 33.00 to 33.02 here in before but transformer / Voltage stabiliser indoor / outdoor type of capacity 100 to 200 KVA

Filtration / De-hidration 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 into the conservator tank / body tank of the transformer / OCB / FRMUs etc at various locations complete all as directed by the Engineer-in-Charge.

M&L for rewinding of distribution (HT/LT) transformers of capacity 500 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.

All as per Item Sl N. 38.00 here in before but for transformers of capacity 100 to 400 KVA

S&F gun metal drain valves suitable for transformer of capacity 200 to 750 KVA including taking down existing un-serviceable gun metal drain valves complete all as specified and as directed.

S&F off load tap changer assembly suitable for transformer of capacity 400 to 750 KVA as per existing with 7 tapping position including opening top cover, conservator etc including taking down existing un-serviceable off load tap changer assembly complete all as specified and as directed.

S&F WTI (Winding Temperature Indicator) suitable for distribution transformer of capacity 400 to 750 KVA as per existing including taking down existing un-serviceable WTI complete all as specified and as directed.

S&F Oil gauge glass with gaskets as per existing suitable for distribution transformers of capacity 400 to 750 KVA including taking down existing un-serviceable Oil gauge glass complete all as specified and as directed.

M&L for preparation of old exposed painted surfaces of indoor / outdoor type transformer of capacity 100 to 750 KVA and painting the same with two coats of synthetic enamel paint including writing details of transformer on transformer plinth / base with white synthetic enamel paint on black synthetic enamel paint back ground complete & including one coat of white wash on exposed surface of transfomer plinth / base complete all as specified and as directed. Note :- Colour of paint shall be as decided by Engr-in-Charge.

S&F OTI (Oil Temperature indicator) as per existing suitable for distribution transformers of capacity 400 to 750 KVA including taking down existing un-serviceable OTI complete all as specified and as directed.

M&L for replacement of Drain plugs to valves/conservator caps of the sizes 3/4", 1", 1.5" valves and plugs, as per existing suitable for distribution transformers of capacity 100 to 750 KVA and complete all as specified and as directed.

Clearing away all bushes, small plants, grass, vegetation, saplings, shrubs, brushwood, undergrowth, roots upto root level including surface dressing n.exc 15 cm deep around and surroundings areas of E/M installations (i.e.Two Pole/ Four structures, outdoor-substation yards, pump house & Misc E/M installations etc) and removing rubbish / debris upto a distance of not less than 50 metres outside the periphery of the area under clearance complete all as directed.

Supply and laying hardcore of aggregate using 20 mm graded crushed stone aggregate upto 0.15 mtr over 0.1 mter of sand coushning in outdoor sub-station yards including surface dressing n.exc 15 cm deep including and removing detriated debris of existing hardcore to a distance n.exc 50 mtr before laying of sand all as specified and directed. Note:- Punned thickness will be measured and paid seperately for sand.

Servicing, Inspecting, checking, cleaning by using of blower, lubrication, greasing and carrying out preventive maintanance of RMU of 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: Unit rate quoted shall be deemed to include cost 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.

S&F Self powered relay with O/C, S/C, E/F protection, having 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 suitable for RMU of capacity 250/350 MVA of Schneider Make including taking down existing un-serviceable relay complete all as specified and as directed.

S&F CT, having ratio100/50 (primary) -1 + 1 A (Secondary), class 1.0, 2.5 VA, class 10P10, 2.5 VA for protection suitable for RMU of capacity 250/350 MVA of Schneider Make including taking down existing un-serviceable CT complete all as specified and as directed.

S&F cable termination bushing for 1KV, RMU of Schneider Make & suitable for upto 1 RUN 3Cx185 Sqmm, XLPE cable including taking down existing un-serviceable cover termination bushing complete all as specified and as directed.

S&F cable termination cover boots, push on type suitable for 11KV, RMU of Schneider Make including taking down existing un-serviceable cover boots complete all as specified and as directed.

S&F three phase indicator lamps (Red, Yellow and blue) suitable for RMU of capacity 250/350 MVA of Schneider Make including taking down existing un-serviceable phase indicator lamps complete all as specified and as directed.

S&F 11KV, 230V, AC, 1KVA control transformer suitable for RMU of capacity 250/350 MVA of Schneider make including taking down existing un-serviceable Control Transformer complete all as specified and as directed.

S&F Battery & Battery charger , 12Ah, (I/P-230V AC, O/P - 24V DC suitable for RMU of capacity 250/350 MVA including taking down existing un-serviceable Battery complete all as specified and as directed.

S&F Spring charging motor suitable for RMU of capacity 250/350 MVA of Schneider make including taking down existing un-serviceable Spring charging motor complete all as specified and as directed.

S&F 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 conforming to IS 9385 including taking down existing un-serviceable fuse link complete all as specified and as directed.

M&L for applying silicone High Voltage Insulator coating (Si-COAT 570 RTV) solution using electric airless sprayer to the inside surface of cable chamber alongwith busbar chamber & breaker chamber including all Spout bushings, insulators, CTs complete of 11 KV Indoor VCB panel including all dis-connection & re-connection of cables etc. complete all as specified and directed. Note:- (i) Quantity of solution consumed per VCB panel shall not be less than 3.0 Kg (ii) Each VCB whether I/C or O/G should be treated as one unit.

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 existing un-serviceable relay of any description complete all as specified and as directed.

S&F in repair lightning arresters expulsion type complete with all fittings, station class, discharge capacity 65 kilo amp suitable for 11000 volts complete all as specified and directed.

S & F the following spares suitable for 250 to 450 MVA HT switch gear VCBs and 11 KV HT panel repair work under relevant schedule & of make as per OEM or as per Existing (if not specifically specified) including taking down existing un-serviceable parts complete all as specified and directed :-

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.

1.5 sqmm flexible PVC insulated, PVC sheathed, multistranded copper conductor cable, unsheathed, 1100 V grade for control wiring.

2.5 sqmm flexible PVC insulated, PVC sheathed, multistranded 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 with 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.

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

Rectifier

Epoxy body for trolly

Spring charging motor

Master Trip Relay

Space heater 120 W in HT VCB 11 kv with suitable to operate on 110 Volts DC supply with necessary wiring and control cable with toggle switch, complete

Thermostat

Supply, install, testing and commissioning of PT dry type unit with resin cast suitable for indoor installation 11 KV / 110 Volts 100 VA, 50 Hz, class 0.5 accuracy, consisting of one single phase PT with suitable metal enclosure for mounting on HT switch gear panel with HV HRC PT fuse of 2 Amps capacity including taking down existing un-serviceable PT complete all as specified and directed.

Disconnect and taking out IDMT / Numeric / Microprocessor based relay of any type & 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:- (i) Arrangement of necessary testing / calibration kits, testing equipments, tools etc. shall be done by contractor and cost of the same shalll deemed to be included in the unit rate quoted. (ii) Testing & tuning shall be carried out in the presence of representative of the accepting officer to the entire satisfaction of the rep of GE.

Taking down HT switch gear (Vacuum circuit breaker ) at INS Dega of capacity 11 KV 250/350 MVA comprising of following repairs, overhauling, servicing, carrying out preventive maintenance and refixing the same after repairs/ overhauling: (a) Tripping off the breaker, lowering the breaker with raising/lowering handle and pulling out the breaker complete from the panel along with the trolley for servicing/inspection/overhauling (b) Servicing/Inspecting/checking of automatic safety shutter, circuit spout and circuit spout connections for RYB phases and replacement of spares operation for serviceability and replacement of spares if required. (c) Dismantling and checking of cross bar assembly, fixed contacts and current carrying parts of the breaker, trolley, insulated assembly and checking lamination with clamps, epoxy spout, isolator assembly etc. (d) Setting, reassembling, cleaning, adjustment of fixed contacts, main contact, arcing contacts and chamber baffle pot assembly, moving contact for proper setting of auxiliary contacts operating mechanism. (e) Servicing/Inspecting/checking of secondary sockets/busbar earthing plugs/earthing sockets and replacement of spares if required. (f) Checking, setting and adjustment of lowering and raising operation of the breaker trolley. (g) Decarbonising of busbar and connected items (h) Lubrication and greasing of all moving parts of the trolley, stopper bolt for proper operating and closing of shutter gear, isolation resistance of trolley of with vacuum interrupter assembly. (Contd...)

j) The inspection of HT switch gear shall involve:- (i) Inspection of truck & hoist assembly. (ii) Inspection of tank assembly & barriers. (iii) Inspection of assembly & components of solenoid assembly. (iv) Inspection of assembly & components of dependent mechanism. (v) Inspection of assembly & components of spring box mechanism. (vi) Inspection of motor mechanism spring charge assembly (vii) Inspection of assembly of trip unit & related components 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 Rep of Auhtorised service centre as approved by GE.

MONITOR ENGINEERING WORKS (BID ID -3490349)

MSN ENGINEERING WORKS (BID ID -3490104)

Jessica Engineering Works (BID ID -3490229)

SRIESWARI ENTERPRISES (BID ID -3490597)

M/S SRI VENKATA BHAVANI CONSTRUCTIONS (BID ID -3488802)

UV POWER TECH (BID ID -3490554)

M/s NATIONAL ENGINEERING CONSTRUCTIONS CO (BID ID -3490249)

P NARAYANA RAO (BID ID -3489428)