PREVENTIVE MAINT AND SERVICING HT 11 KV DISTRIBUTION TRANSFORMERS, 4 POLE STRUCTURERS AND CONNECTED WORKS IN VARANASI CANTT UNDER GE (EAST) PRAYAGRAJ.

Amount

Excavation in trenches/pits in any type of soft soil not exceeding 1.5 m wide and not exceeding 1.5 m deep and getting out, complete all as specified and directed.

Returning, filling in with the earth obtained from item No.01 here-in-before including spreading, levelling, watering and well ramming in layers not exceeding 25 cm thick complete all as specified and directed.

Removal of surplus excavated soil to a distance not exceeding 50 m and depositing where directed at a level not exceeding 1.5 m above the starting point complete all as specified and directed.

Supplying and laying un-reinforced precast concrete cable cover factory made as per IS 5820-1970, class HVP, type 1 , size 300mm x 180mm x 40mm complete all as specified and directed.

M&L for clean and dry sand (unwashed) in trenches around the cable for cushioning complete all as specified & directed. Note :- Sand cushioning 8cm before laying the cable and 15cm after laying the cable & punned down 18cm,and punned thickness shall be measured and paid.

Supply, laying, testing and commissioning in pipes/ ducts/ poles/trenches/ under floor/under road XLPE insulated cable screened PVC heavy duty with aluminium conductor,11000 Volt grade(earthed) of cross section area 95 Sqmm,3 core complete all as specified & directed.

Supply and laying 80mm bore GI pipe 'light grade' in trenches,under floors,roads,along poles for protection of cables,including sealing ends complete all as specified & directed.(MS Clamps to be measured and paid under appropriate item) complete all as specified and directed.

M&L for painting of two pole structure of 11m steel poles with cross arms, bracings, clamps of any length and shape for HT overhead line with two coat of aluminum paint including preparation of the existing surface including marking pole numbers in a 15cm dia yellow circle & marking three black & two yellow bands width 30cm by fluoroscent pait, from bottom of pole above coping to 1.5mtr height, complete all as specified and directed.

M&L for painting of four structure of 11m steel poles with cross arms, bracings, clamps of any length and shape for HT overhead line with two coat of aluminum paint including preparation of the existing surface including marking pole numbers in a 15cm dia yellow circle & marting three black & two yellow bands width 30cm by fluoroscent paint, from bottom of pole above coping to 1.5mtr height, complete all as specified and directed.

M&L for cutting triming and vending tree branches along HT/LT over head lines after arranging electrical shut down, including taking all precautions while working on lines contractr using own T&P by the contractor complete all as specified and directed, (Note:- For taking shut down to excute the work minimum one skilled electrician and four mazdoor for 8 houres/day shall be depolyed on the work).

Supply and fixing Heat shrinkable,straight through joint box for XLPE HT U/G cable,11KV grade suitable for cross sectional area 95 Sqmm 3 core XLPE out door type XLPE cables complete all as specified and directed. Make : M Seal/ Reychem/Cabseal. (Note :- The rates quoted shall be deemed to include the charges of fault locator machine/eqpt fromUPPCL or any other elect agency as available).

Supply and fixing in replacement cable end termination heat shrinkable type 11KV grade suitable for sizes of XLPE cable 95 Sqmm 3 core indoor type complete all as specified and directed.

Supply and fixing in replacement cable end termination heat shrinkable type11 KV suitable for sizes XLPE cable 95 Sqmm 3 core outdoor type complete all as specified and directed.

M&L for defect rectification in HT 11 KV cable laid in trenches by locating fault with the help of electronic fault locator machine comprising of surge generator pulse ECHP fault location with high frequency distance calculator etc. Excavation in any type of soil strata exposing the cable fault removal of deteriorated position of cable treating of cable and keeping the same ready for jointing work for cables of size upto 300 sqmm 3 core. The fault located equipment will be brought at site within 02 hours of Instruction received from Engineer-in-charge complete all as specified and as directed.

M&L for Calibration of VCB CHECKING (All connections and mechanism) cleaning servicing overhauling,testing complete of 3 phase 11 KV vaccum circuit breakers any make/type as mentioned below :-

(a) Taking out incoming and outgoing HT 11 KV 3 core cables from the electric system and checking CTs 03 Nos of each VCB for insulation and saturation calibrating with the help of primary injection & testing kit for primary triping system in presence of Engr-in-Charge/rep ofEngr-in-Charge and reconnecting the incoming and outgoing HT cables ,complete all as specified and directed.

(b) Inspecting, servicing and testing all connections of control wiring availability of proper D.C. supply,incoming and outgoing connections and tightening them,cleaning the contacts and terminal with CTC solution and using the blower for dusting incl replacement of faulty control fuses,indication lamp & testing for satisfactory operation raising and lowering mechanism in presense of Engr-in-Charge, complete all as specified and directed.

(c) Taking out IDMT over current relay 01 Nos and earth fault relay 01 No from the 11KV VCB (2 Nos In each) and calibrating the relays with the help of secondary injection kit and proper setting of relays and refixing back in existing position testing of proper tripping system in presence of Engr-in-Charge complete all as specified and directed.

(d) Taking out incoming and outgoing HT 11 KV 3 core cables from the electric system and checking PT 11 KV/110V of each VCB for insulation and accuracy and calibrating the same in presence of Engr-in-Charge/rep of Engr-in-Charge and reconnecting the incoming and outgoing HT cables complete all as specified and directed.

Disconnection & taking out old/defective current transformer (CT) from 11 KV VCB panel and supply ,fixing,intallation & testing of current tranformer ,indoor comprising of 3 Nos single phase resin cast CTs of 300-150/5+5 amps ratio ,PS class ,with suitable V A burden and accuracy suitable for protection & material incl making suitable arrangement for fixing in existing VCB panel and connection 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 and cost of the deemed to be included in the above rates. (ii) The all above checking ,inspection ,installation and testing work shall be performed by auth HT expert engineer.

Supply, installation, Testing & Commissioning of Electronic Numerical self powered programmable type digital Relays having high tourque, low burden ( not more than 5.5 VA) and low over shoot triple pole non directional suitable for 5 Amp current rating and having three over current and one earth fault elements with over current IDMT/ definit time and instant trip, range 20% to 200% in step of 1% per phase and earth fault range of 10% to 80% fault and time setting of 3.0 seconds to 10 times of current setting in steps of 0.1 seconds and accuracy of class 5 confirming to IS 3231 of 1965 including 4.5 volt alkaline battery, flush pattern with accessories duly connected with trip and alarm system - 01 No complete all as specified and directed. Note: The contractor has to visit the site to check the existing relay & wiring of 11 KV VCB panel for installation of Microprocessor based relay.

Supply and fix in replacement of Big gear assembly suitable for HT 11KV/12KV VCB 630 Amps as per existing make and model and directed .

Supply and fix in replacement of Small gear assembly suitable for HT 11KV/12KV VCB 630 Amps as per existing make and model and directed .

Taking out trolly from VCB , opening of trolly to clean the parts, cleaning of tank, dismentling of existing unserviceable vaccume interrupter and supply, installed testing of vacuume interrupter matching to existing one suitable for 11 KV 400 amps HT VCB complete all as specified and directed..

Dismantling of existing unserviceable bus bar spout after disconnecting all incoming and outgoing connections and S/F new bus bar spout of 11 KV 400 Amps VCB matching to existing one including all incoming and outgoing connection complete all as specified and directed.

Supply and Fix in replacement charging gear for crompton make trolly mechanism 11 KV VCB, complete all as specified & directed

Supply and Fix in replacement teflon hexagonal interlocking bush to complete interlocking with strip as per sample complete all as specified & directed

S&F in repairs of motor & gear assembly 220 volts AC/DC or as per model suitable for 400Amps HT VCB as per existing make and model and directed.

M&L for checking (All connections and mechanism) cleaning servicing overhauling,testing complete of 3 phase 11 KV Ring main unit any type/make outdoor type respectively as mentioned below :-

(a) Taking out incoming and outgoing HT 11 KV 3 core cables from the electric system and checking CTs 03 Nos of each breaker for insulation and saturation calibrating with the help of primary injection & testing kit for primary triping system in presence of Engr-in-Charge and reconnecting the incoming and outgoing HT cables complete of panels complete all as specified and directed.

(b) 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 satisfactory operation raising and lowering mechanism in presense of Engr-in-Charge complete all as specified and directed.

(c) Taking out existing over current relay 02 Nos and earth fault relay 01 No from the 11KV breaker B (3 Nos In each) and calibrating the relays with the help of secondary injection kit and proper setting of relays and refixing back in existing position testing of proper tripping system in presence of Engr-in-Charge complete all as specified and directed. (d) Supplying and fixing gas chamber with SF6 gas. (e) Supplying and fixing of Mechanism compartment. (f) Supply and fixing of bus bar spout (g) Supplying and fixing of self supplied protection relay NOTE : (i) All the instruments,primary and secondary injection kit and T&P required for the above job shall be arranged by the contractor at site and cost of the deemed to be included in the above rates. (ii) All the test record shall be mentioned and signed by the testing engineer and contractor and Engineer-in-Charge. (iii) The above work shall be performed by HT expert/ engineer.

M&L for filteration and centrifuging of transformer oil complete all as specified and directed. Note :- Centrifuging machine to be arranged by contractor and its cost shall be deemed included in the quoted rate. BDV of test to be noted before and after centrifuging. Centrifuging and cleaning will be carried on until BDV of 50KV with 2.5mm gap . Heaters not less than 5KW should be used. Oil required for top up or replacement will be measured separately

M&L for transformer oil for top up in transformer complete all as specified and directed. Note : Only Sealed container will be brought at site with minimum BDV 45 KV for use.

M&L inclusing transportation from sub stn Varanasi cantt to workshop and back and taking down the defective unserviceable transformer from existing site from pole and Sub Stn with the help of man power & chain pully block or by crane etc including dieconnecting all electrical and mechanical connections from the site and carrying to workshop for repair and Opening Dismantling the transformer of capacity 63 KVA to 250 (including 250 KVA capacity of trs ) KVA by lifting the top cover taking out the HT/LT core 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 HT/LT coils silicor stamping and other connected items as Tap-changer, breather assembly etc and replacement of HT and LT coil and connected to existing serviceable strip by jointing with soldring and re insulated of 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 Reassenbling the transformer LT/HT connection with help of soldering and eplacement of old burnt u/s item including transporting of capacity 63 KVA to 250 KVA(including 250 KVA) including transporting back after repair to the site where recieved and testing of transformer after reassembly complete testing of transformer after repair incl painting to the transformer with super enammed paint complete all as specified and directed. Note :- HT/LT coils and other connected items shall be measured & paid seperately.

All as per srl item No. 28.00 here in before but for 315 KVA to 415 KVA (including 415 KVA) complete all as specified and directed.

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

Supply & replacement of HT/LT bush Insulator complete with rod as per existing material & size and nut suitable for indoor/outdoor type transformer 63 KVA complete all as specified and directed.

All as per Srl item No 31.00 here in before but 100 KVA to 250 KVA complete all as specified and directed.

All as per Srl item No. 31.00 here in before but 315 KVA to 415 KVA complete all as specified and directed.

Supply & replacement of tap changer for adjusting the voltage with brass parts as per sample of existing for indoor/ outdoor type transformer 63 KVA all as specified and directed.

All as per item No 34.00 here in before but 100 KVA to 250 KVA complete all as specified and directed.

All as per item No 34.00 here in before but 315 KVA to 415 KVA complete all as specified and directed.

M&L for earthing complete with galvanised steel earth plate electrode 600mm x 600mm x 6mm thick buried directly in ground (earth pit not less than 2.25m deep below GL with top edge of plate not less than 1.50 m below normal ground level) connected to galavanised earth lead strip 25mm x 4 mm (7.5m) as means of bolts, nuts, check nuts and washer besides brazing at all joints as shown on drawings and including excavation, earth work, GI pipe (ISImark) light grade 40mm bore for protection of GI strip from earth electrode to and including the earth test point, supplying and laying charcoal dust, common salt, PCC 1:3:6, type C-1(using 20 mm graded crushed stone aggregate ) chamber and mild steel angle iron frame 40 x 40 x 3 mm and 40 mm thick pre-cast RCC cover 1:2:4 , type B-1(using 20 mm graded crushed stone aggregate ) reinforced with 8 mm dia TMT bars @ 75 mm C/C both ways with mild steel handle 12 mm dia, PGI funnel and wire mesh, 20 mm dia GI pipe light grade(ISI marked) for watering all as shown in electrical plate No 3 of SSR Part-I and connected to earth test point including testing & taking down of old/ ineffective earthing complete all as specified and directed. (Note:- The rates quoted shall also deemed to include the cost of Earth test point and earth wire and protection pipe upto 7.5 meter beyond the earth plates electrode) complete all as specified and directed.

M&L for repair of earth pits at substation and of lightining protection by cleaning in and around the chamber,repair /replacement of MS chamber cover /PCC cover slabs ,removing wild growth needs from the area around earth chamber ,provn of salt water in to earth pits ,repair /replacement of funnel ,checking of earth contunity connecting checking and recording of earth results and painting the results and date of testing etc on the chamber complete all as specified and directed.

H.B. Traders (BID ID -3098064)