REPAIRS TO HT SWITCH GEARS DEHYDRATION OF TRANSFORMER AND OTHER MISC WORKS AT AFA HYDERABAD

Amount

M&L for Testing of dielectric strength of transformer oil of indoor / outdoor type transformer, 11 KV / 433 volt, filteration of transformer oil by passing through filtration plant to remove moisture, improving di-electic strength to above 40 KV for 1 minute including new transformer oil for filling / toping up & testing after filtration complete all as specified and as directed. (Note:- NewTransformer oil will be measured and paid separately under relavent Items of BOQ)

M&L for toping / filling up / replacement of transformer oil with 50 KV di-electric strength complete all as specified and as directed.

M&L for replacement of Silica Gel breathers including silica gel, suitable for transformers 11 KV / 433 Volts complete all as specified and as directed. of the following capacity :-

M & L for replacement of thermometer (oil temperature gauge) for indoor type transformer, complete all as specified and as directed .

M&L for Disconnecting of LT and HT cable carefully from Transformer and draining out transformer oil, Removing transformer top cover and dismantling of 4 Nos LT bushing and 3 Nos of HT bushing,Tap changer to attending leakage problem with oil seal and all gaskets and replacing the burn out HT / LT bushing and copper Studs including necessary tools and plant and re assembling complete all as specified and as directed for the following capacity :- Note :- (i) Oil seal and all Gaskets are deemed to be including in the coated rate. (ii) New Transformer oil ,HT,LT bushing and studs will be measured and paid separatley under relavant Items.)

(b) 315 / 250 / 200 / 160 / 100 KVA / 400 KVA

Supply only Bushing on HT Side with copper rod complete all as specified and as directed for following capacity :- transformers :-

Supply only Copper stud with nut ,washers on HT Side complete all as specified and as directed for following capacity transformers :-

(b) 315 / 250 / 200 / 160 / 100 KVA/400 kva

Supply only Bushing on LT Side complete all as specified and as directed for the following capacity transformers :-

Supply only Copper stud with nut,washers on LT Side complete all as specified and as directed for following capacity transformers :-

M&L for Spray Painting of Transformer of following capacity , indoor / out door type with Two coats of synthetic enamel paint over a coat of red oxide primer after cleaning, scraping, and filling of cavities complete all as specified and as directed.

(c) 315 / 250 / 200 / 160 / 100 KVA/ 400 KVA

M&L for Heat shrinkable HT 11 KV Indoor termination joint kit for XLPE 11 KV 3 Core cables including materials for the following sizes of cable complete all as specified and as directed :-

(a) 3 Core XLPE Cable 50 to 95 Sqmm

(b) 3 Core XLPE Cable 120 to 185 Sqmm

M&L for Heat shrinkable HT 11 KV Out door termination joint kit for XLPE 11 KV 3 Core cables including materials for the following sizes of cable complete all as specified and as directed :-

(a) 3 Core XLPE Cable 50 to 95 Sqmm

(b) 3 Core XLPE Cable 120 to 185 Sqmm

Disconnecting the electric acable connections , taking out the voltage stablizer from its posotion at any jobs sitiation with the help of suitable pully / cran and trasportating the voltage stablizer to workshop for carrying out necessary repairs and brining back and re-install in its original place, of capacity upto 75 KVA complete all as specified and as directed.

Supply and fixing power pack unit of capacity 230 / 24 volt 3 phase and making necessaryconnection to PTs complete including taking out U/S one complete all as specified and as directed. Make : Power Pack

Supply only plastic sleeve suitable for moving arm unit (male & female) type suitable for existing HT 11 KV breaker complete all as specified and as directed

Supply and fix pin type polymer insulator 11 KV 320 cd 5 kn for 11000 volts grade complete including dismantling of old unserviceable insulator complete all as specified and as directed

Supply and fix disc insulator 11 KV 320 cd 5 kn for 11000 volts grade complete including dismantling of old unserviceable insulator complete all as specified and as directed

M&L for Checking /repairing of outdoor non wall type 11 KV Package compact sub station (PSS) (a) CT , (b) PT , (c) Relays and testing of of inter connection & earthing between HT Switch gears and LT switch gear with complete control wiring , over curret relay , earth fault relay , calibretation of all HT relays considering time delay and IDMT features by engaging well experince OEM/Reputed Company Rep for assessing the fault witinin the faulty circuit and rectified the same for smooth function of Compact Substataion with 1000 KVA transformer ,630 Amp HT switch gear /LBS and LT switch gear complete all as specified and as directed Note:- Spare parts will be measured & paid separetly.

(iii) Inspecting / overhauling /cleaning and inspecting through insulators, vacuum interupters by carbon cleaner solution and apply dry graphite conductive sealant (STNVAC) for electrical contacts to avoid carbon deposits on contact surfaces.

(iv) Inspecting / cleaning / overhauling of bus bar chamber by checking of bus bars, spout insulators, space heaters and removing dust with vacuum cleaner / Blower and moisture by hot air blower and checking tightness of bus bars, insulators and applying STRIPPEX (A), STRIPPEX (B) insulating coating (STANVAC Make) and HT tape and test with High Voltage (DC) and meggering before and after high voltage test complete.

(v) Inspecting / cleaning / overhauling of CT / PT chamber by checking of Bus bars, spout insulators, space heaters, PTs, CT's and checking of wiring system and removing dust with vacuum cleaner / blower and moisture by hot air blower and checking tightness of bus bars, insulators and applying Anti Tracking Paint (STANVAC) on CT's and insulators and HT 11KV Tape.

M&L for disconnecting and dismantling the existing indoor type, 11 KV, 25kA / 18.3 kA Horizontal Isolation horizontal draw out type VCB trolly of rupturing capacity 350 MVA,630 / 800 Amps from location and including replacement of unserviceable / damaged spare parts and repair / overhauling and carrying out with the following complete all as specified and as directed . Note :- Spare parts will be measured and paid separately under relavent Item No

(i) Inspecting / overhauling of manual / motorised spring drive mechanism by checking mechanism, motor and gear assembly, big gear assembly, stop bolt assembly, main shaft interlocking assembly, closing spring assembly, small cam with screw,motor cut -off limit switch, butter fly swich assembly and apply multi grease lubricant to function smoothly.

(ii) Inspecting / overhauling of Shunt trip / Closing coil assembly,earthfault release assembly, auxilary switch and checking of electrical wiring system.

(iii) Inspecting / overhauling /cleaning and inspecting through insulators, vacuum interupters by carbon cleaner solution and apply dry graphite conductive sealant (STNVAC) for electrical contacts to avoid carbon deposits on contact surfaces.

(iv) Inspecting / cleaning / overhauling of bus bar chamber by checking of bus bars, spout insulators, space heaters and removing dust with vacuum cleaner / Blower and moisture by hot air blower and checking tightness of bus bars, insulators and applying STRIPPEX (A), STRIPPEX (B) insulating coating (STANVAC Make) and HT tape and test with High Voltage (DC) and meggering before and after high voltage test complete.

(v) Inspecting / cleaning / overhauling of CT / PT chamber by checking of Bus bars, spout insulators, space heaters, PTs, CT's and checking of wiring system and removing dust with vacuum cleaner / blower and moisture by hot air blower and checking tightness of bus bars, insulators and applying Anti Tracking Paint (STANVAC) on CT's and insulators and HT 11KV Tape.

(vii) Assembling all items / components parts to the respective postion and testing the breaker with High Voltage (DC) and meggering before and after high voltage test complete.

M&L for Repair / Overhauling existing indoor type, Load Break Switch / RMU, 11 KV, SF 6, Switch Gear Panel and carrying with following and including replacement of un serviceable / damaged spare parts complete all as specified and as directed. Note : - Spare parts will be measured and paid separately under relavant Items

(i) Inspecting / overhauling of Manual / motorised spring drive mechanism by checking mechanism, Motor and gear assembly, Big gear assembly, stop bolt assembly, Main shaft interlocking assembly, closing spring assembly, small cam with screw, motor cut -off limit switch, Butter fly switch assembly and apply Multi grease (Stanvac) lubricant to function smoothly.complete all as specified and as directed

(ii) Inspecting / overhauling of assembly, earth fault release assembly, tripping coil, auxiliary switch and checking of electrical wiring system

(iii) Inspecting / overhauling / cleaning and inspecting insulators, vacuum interrupters, gas Chamber by carbon cleaner solution and apply dry graphite conductive sealant (Stanvac) for electrical contacts to avoid carbon deposits on contact surfaces.

(iv) Assembling all items / components parts to the respective position and testing the breaker with High Voltage (DC) and Meggering before and after high voltage test complete.

(v) Overhauling/testing of Metering Panel including CT and PT

Supply only spare parts of Ring Main Unit (RMU) ,11 KV,630 Amps Make :- Schneider / ABB / Siemens complete all as specified and as directed for the following :-

(a) Plug -In type insulators with Current carrying parts and SF6 gasket seals.

(b) Static Relays,self powered 3O / C + 1E / F

(c) Current Transformer,100 /1A ,15 VA burdn, class 1 accuracy for metering

(d) Current Transformer,250 /1A,15 VA burdn, class 1 accuracy for metering

(e) Current Transformer,250 / 1A,15 VA burdn, class 5p10 accuracy for protection

(f) PT Fuse ,11KV/110Volts

(g) Multi function meter, digital type

(h) ON / OFF push buttons

(l) Live Voltage Indicating Unit

(k) Terminal protection Right Angled cold applies Boot

(l) Potential transformer,11KV / 110 Volt / Rout 3,100 VA burden Trolly mounted with HRC Fuse

(m) Barrel Fuse 63 Amps

Supply only spare parts of VCB,11 KV,630 Amps 18.3 kA / 25 kA Harizontal Isolation Harizontal drawout type Make :- Schneider / ABB / Siemens complete all as specified and as directed for the following :-

(a) Opening / Closing Push Button Assembly

(b) Motor Charging mechanism gear box assembly

(c) Limit Switch assembly

(d) Closing Coil Assembly 24 Volt DC/110

(e) Tripping Coil assembly 24 Volt DC/110

(f) Spring Charging Motor

(g) Auxiliary Switch with link

(h) Spring return latch assembly

(j) Vaccum Interupter assembly

(k) Spout Insulators

(l) Potential transformer,11 KV / 110 Volt / Rout 3 ,100 VA burden Trolly mounted with HRC Fuse. Make :- Gemini Instratech / Ericon / Epitrans Electricals / Kappa / Pragati

(m) Current transformers,50 / 30,1+1 Amp s, Class1 and 5p10,15 VA Make :- Gemini Instratech / Ericon / Epitrans Electricals / Kappa / Pragati

(n) Current transformers,100 / 50 ,1+1 Amps, Class1 and 5p10 ,15 VA Make :- Gemini Instratech / Ericon / Epitrans Electricals / Kappa / Pragati

(o) TNC Switch

(p) Ammeter Digital type 96 mm x 96 mm

(q) Voltmeter Digital Type 96 mm x 96 mm

(r) Power Factor Meter Digital type 96 mm x 96 mm

(s) Indicating Lamps LED type 24 / 30 / 110 Volt DC or AC

(t) Relay Microprocessed based 3 O/C and 1E/F Type 7SR10 Siemens

(u) Relay Microprocessed based 3 O/C and 1 E/F Type MiCO M P111 Schnieder

(v) Relay Microprocessed based 3 O/C and 1 E/F Type MC61 L&T

(w) Master Trip Relay Type

(x) Power Pack with Battery Backup 415 / 110 AC to 30 / 110 VAC 3 Phase

(y) Power Pack with Battery Backup 230 / 110 AC to 30 / 110 VAC 1Phase

M&L for HT 11 KV cable XLPE / PILCA cable fault locating by removing the both ends of the cable and locating the fault with Fault Locating Machine with necessary manpower for excavating the faulty area and making the faulty cable as servicable with suitable size of Straight through joint kit etc complete all as specified and as directed by Engineer-in-Charge. (Note :- End terminations / Straight Through joint kits will be measured and paid separately under relavent Items No 11 and 12 of BOQ)

Supply and laying in repairs of XLPE insulated screened PVC bedded, galvanised steel strip or wire armoured, electric power cables (heavy duty) with stranded aluminum conductor, 11000 Volts (E) grade, of cross section mentioned under, after removing the unserviceable PILCA / XLPE cable complete all as specified and as directed by the Engineer-in-Charge for the following sizes :- (Note :- Earth work and cable protection cover will be measured and paid separately)

(a) 95 Sqmm 3 Core

(b) 120 Sqmm 3 Core

(c) 150 Sqmm 3 Core

(d) 185 Sqmm 3 Core

M&L for cross arms, bracings, clamps and back plates fabricated from structural steel section with painting of one primer coat and under coat and one finishing coat including nuts, bolts, washers, drilling holes for bolts in any shapes or size all as directed and including taking out unserviceable material complete all as specified and as directed.

M&L for HT Straight through jointing kit Heat shrinkable type suitable for HT 11 KV XLPE armoured aluminium cable with necessary jointing materials straight through, connecting of sizes suitable for the following size of cable complete all as specified and as directed :-

(a) 50 to 95 Sqmm 3 Core

(b) 120 to 185 Sqmm , 3core

Taking down unserviceable HT mat and S&F Fire retardant / extinguishing electric insulated synthetic mat suitable for 11000 voltage system of 2.5 mm thick (size 2mx1m) , confirming to relevant IS / IEC codes, tested for breakdown strength, tensile elongation properties, insulation resistance, effect of acid, alkaline, diesel and transformer oil leakage, current test, fire test etc., having a minimum width of 100 mm including all pasting materials such as PU resin, chemi bond (hardener), special PVC adhesive and fixed in electrical installation complete all as specified and as directed.

Excavation in trenches not exceeding 1.5 mtr wide and not exceeding 1.5 mtr in depth in hard / dense soil for laying of cable / GI pipe and getting out complete all as specified and as directed.

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

Removing surplus soil to a distance outside MD land and depositing where directed at a level not exceeding 1.5 mtr above the starting point complete all as specified and as directed.

M&L for dry clean river sand for cushioning of cable in trenches for cable protection including spreading, leveling and hand punning complete all as specified in SSR Part-I and as directed. Note :- Punned down thickness only shall be measured for the purpose of payment.

Supplying and laying un-reinforced precast concrete cable covers , class HV Type I, flat, size 300 mm x 180 mm x 40 mm. laid in trenches for cable protection complete all as specified and as directed.

M&L for disconnect the HT/LT connection taking out the transformer from its plinth at any situation with the help of suitable cran and transporting the transformer civil work shop for carring out necessary repairs and bringing back and re-install its original place of capacity upto 400 KVA. complete all as specified and dircted

Description all as per Ser Item No 33 above but Transformer of Capacity is above 400 KVA to 1000 KVA complete all as specified and as directed

Material and labour for rewinding of HV winding with DPC insulated enamelled copper wire and as per manufacturer's specifications complete all as specified and as directed

Material and labour for rewinding of LV winding with DPC insulated enamelled copper wire and as per manufacturer's specifications complete all as specified and as directed

M& L for re Locating of VCB 11 KV Panel Board Consisting 01 Nos of VCB's with in sub station at Sub sation No.6 TO Sub Station No 01 complete all as specified and as directed including for the following :- Note :- Cable and Joints will be measured and paid separately under relavent Item No11 and 12 of BOQ

(i) Dismantling of all cable connections carefully and re connecting the same into Panels after re Location of Panel Bord.

(ii) Dismantling of VCB panels carefully and shifting to new location and Re Errect / Assemble the VCB,s in respective position.

( iii ) Testing and Commissioning the VCB panel Board after succefully shifted to new Location complete all as directed by Engineer-In-Charge.

M&L for shifiting of distribution transformer (11 KV / 0.433 KV) of capacity 400 / 250 / 160 / 200/ 100 KVA from its existing location to its proposed location after taking necessary shut down, disconnection of HT / LT cables, earthing connections and including necessary loading / unloading charges and hire charges of hydraulic lifting machines and necessary connections to HT / LT cables, earthing connections etc.in new location complete all as specified and as directed.

M&L for servicing and repairing of APFC panel including checking and repairing of faulty ciricuit and rectify the same complete all as specified and as directed

M&L for Dismantling / Taking out the SF 6 RMU 11 KV, 630 Amps (Consisting 01 Incoming + 02 Outgoing + Meter Panel) Make Schnieder / ABB carefully and including replacement of un serviceable / damaged spare parts and shifted to factory premises to Repair / Rectification of SF6 Gas leakage problem by replacing broken Plug- In Insulators with SF6 Gas seals as per manufacturers recommendations and checking/repairing of motarised mechanism, control wiring, Current transformers, Potential transformers, Relays, barrel fuse assembly with HRC fuses including fuses compartment, measuring indicators, indicators lamps and replace the wornout unserviceable parts , broken insulators, SF6 Gas tank seals and refilling the SF6 gas. Shifting of RMU from factory primisse to Site after succefull repair and testing the RMU complete all as specified and as directed .

Note :- (i) Rate is demed to be including of Tranpsportation, loading ,unloading, re errection and testing and commissioning. (ii)Spare parts will be measured paid separatly under relavent items Item (iii) Filling of SF6 gas will be measured and paid separatly under relavent Item

M&L for filling of SF6 gas as per Manufacturer specifications complete all as specified and as directed.

POWER CONSTRUCTION COMPANY

Srinivash Engineers