PREVENTIVE MAINTENANCE TO 33KV MAIN RECEIVING STATION AND CONNECTED WORKS OF EXTERNAL ELECTRIFICATION SYSTEM AT AFS BAMRAULI

Amount

Excavating in trenches (soft/loose/Hard/dense soil), n.exc. 1.5metre wide and n.exc. 1.5metre deep and getting out complete all as specified and as directed.

Returning filling in wih earth obtained from item No 1 here-in- before including spreading leveling, watering and well ramming in layers not exceeding 25cm thick complete all as specified and as directed.

Removal of surplus excavated material to a distance n.exc. 50 metre and depositing where directed at a level n.exc. 1.5 metre above starting point complete all as specified and as directed.

Supply and laying sub class 'B' bricks (Old Size) laid flat in trenches as cable covers abutting each other, gap between adjacent brick shall not be more than 10mm complete all as specified and as directed.

Supply and spreading clean and dry screened sand (unwashed) in trenches around the cable for cushioning complete all as specified and as directed. Note: - Punned thickness shall be measured for payment purpose.

Surface excavation of any type of soil not exceeding 30Cm deep and getting out complete all as specified and as directed.

Supply and laying of cable , Cross linked polyethylene insulated (XLPE) armoured cable with aluminum conductor 11KV 'E' 3 core confirming to IS-7098 of cross sectional area 185 Sqmm, 3 core in trenches/through pipes/duts or on poles at crossing of over head lines of MES and road crossing including taking down old cable complete all as specified and as directed.

Supply and fixing heat shrinkable joint box for XLPE HT 11 KV grade U/G cable suitable for cross setional area 120-185 Sqmm 3 core out door type complete all as specified and as directed.

Supply and fixing heat shrinkable joint box for XLPE HT 11 KV grade U/G cable suitable for cross setional area 120-185 Sqmm 3 core indoor type complete all as specified and as directed.

Supply and fixing heat shrinkable joint box for XLPE HT 11 KV grade U/G cable suitable for cross setional area 120-185 Sqmm 3 core straight through joint complete all as specified and as directed.

Repairing and servicing (Oiling and greasing) of gang operated switch 33 KV vertical/Horizontal mounted and replacing defective parts. Including replacement of unserviceable spare parts as required for smooth functioning of Air Break Switch, testing for its proper operation, complete all as specified and as directed. Note :- Supply of spares shall be measured and paid separately.

Supply only Male Contact/moving contact Blade heavy duty high conductive metal cap 200/400 amp 33 KV for gang operating switch 33 KV to be fix under Item 11 here-in-before as per exisiting make complete all as specified and as directed.

Supply only Female Contact/Fix contact Jaw heavy duty high conductive metal 200/400 amp 33 KV for gang operating switch 33 KV to be fix under Item 11 here-in-before as per exisiting make complete all as specified and as directed.

Supply and fixing in replacement cable end termination heat shrinkable type 11 KV suitable for XLPE cable 50 - 95 sqmm 3 core indoor type complete all as specified and as directed.

Supply and fixing in replacement cable end termination heat shrinkable type 11 KV suitable for XLPE cable 50 - 95 sqmm 3 core outdoor type complete all as specified and as directed.

Supply and topping up of transformer oil in transformer where oil level of transformer is below minimum level complete all as specified and directed. Note :- (i) The dielectric strength of transformer oil must be not less than 40 KV. (ii) The transformer oil to be brought to the site in sealed drum.

M&L to locate the fault in HT 33KV/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 including 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. Note (a) :-Cable joint shall be measured and paid separatly. (b) The fault locating equipment will be brought at site within 02 hours of Instruction received from Engineer-in-charge complete all as specified and as directed by Engineer-in-charge

S&F insulator PIN type with GI Spindle nut complete suitable for 33KV grade size complete all as specified and as directed by Engineer-in-charge.

M&L for spreading and leveling evenly (any thickness) 20 mm graded stone aggregate complete all as specified and as directed.

S&F in replacement 33 KV outdoor type single phase cast epoxy type PT (Potential Trasformer) of ratio 33KV/110V class 0.5 burden 100V insulation level 70/170 KV cofirming to IS 3156 complete all as specified and as directed.

Supply , installation in replacement , testing and commissioning current transformer outdoor type (Cts) single pole 3 core cast type of 15 VA burden class 1, 5P10 and PS having turn ration 60-30/5+5+1 Amp and suitable for protection and metering of 33 KV system mounted on and including suitable MS channel/angle iron pedestal etc. to MCCB and 1 NO junction box for CTs connection having 3x12 way stud type terminal block and cable gland plate with suitable size of glands for cable entry of 10x2.5 mm Sqmm -04 Nos and 4x2.5 Sqmm -02 No cable connection complete all as specified and as directed.

Supply and installation in replacement of dropout/lift off expulsion fuse outdoor type fuse link suitable for vertical or horizontal installation consisting of galvanised iron channel base having 2 Nos 33 KV post type insulator per stack and 2 Nos. of such stack per hase complete with fuse carrier Teflon tube bakelite heavy tinned non ferrous metal parts and springs loaded phosphorous bronze contacts complete confirming to relevent IS complete all as specified and as directed.

M & L in replacement for lighting arrestor non linear resistance type line discharge current 10 KA height current 100 KA assembly suitable for 33 KV inclusive all necessary clamps nut, bolts and washers and connecting to GI strip 32 x 6 mm complete all as specified and directed.

Supply and laying of cable , Cross linked polyethylene insulated (XLPE) armoured cable with aluminum conductor 33KV 'E' of cross sectional area 300 Sqmm, 3 core in trenches/through pipes/duts or on poles at crossing of OH lines of MES and road crossing including taking down old cable complete all as specified and as directed.

Material and labour in replacement for earthing complete with copper earth plate electrode 600x600x3.15 mm thick buried directly in ground vertically to depth not less than 2.25 M below normal ground level (with top edge of earth plate not less than 1.50 meter below ground level), connected to copper strip 20 mm x 3mm main earthing lead by means of copper bolts, nuts and washers with connected to earth test point to main switch board panel etc. all as specified and testing on completion with and including necessary adequate quantity of charcoal dust and common salt, test point PCC (1:2:6), type B1 (using 20mm graded stone aggregate) for earht pit 40mm x 40mm x 6mm mild steel angled iron frame for covered precast (RCC 1:2:4) type B1 (using 20mm graded stone aggregate) 40 mm thiick cover reinforced with 6mm dia TMT bar 3 Nos. both way with 12mm round bar handle. GI light grade watering pipe 40mm dia with funnel, wire mesh all as shown in electric plate No. 3 of SSR PArt-I of 2009 and 40mm dia GI light grade pipe for earth lead protection complete all as specified and directed.

Inspecting, checking (All connections and Mechanism ) cleaning, servicing, overhauling , testing, callibrating the relays (IDMT, over current and earth fault) complete of 33 KV Vaccum circuit breakers outdoor type 400 Amps, capacity having rupturing capacity 750 MVA floor mounted including following works :- (a) Taking out incoming and outgoing HT 33 KV 3 Core cables from the electric system and and reconnecting the incoming and outgoing HT Cables complete of both panels. (b) All 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 operation, raising and lowering mechanism. Note :- (i) Servicing, checking and coliberation of VCB shall be carried out by the OEM or his authorised representative/dealer only.(ii) All the test rocord for proper tripping of CTs, raising and lowering operation mechanism and proper tripping system of over current and earth fault relay shall be mentioned and signed by the contractor, Engineer-in-Charge and representative of OEM shall be produced before allowing payment to the contractor.

M&L in replacement Earth continuity conductor or main earthing lead fixed to wall on batten or recess or chases or buried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing etc. as required 20X3mm copper strip all as specified and directed

S&F HRC fuse 2/6 Amp, 415 V AC for VCB 11 KV complete all as specified and as diected.

Supply and laying 150mm bore GI pipe “Light Grade” in trenches, under floors, roads, along poles for protection of cables, including sealing ends all as specified & directed as specified & directed.

Supply and fixing end termination outdoor type heat shrinkable suitable for 33 KV , 300 Sqmmx3 core XLPE cable complete all as specified and as directed.

Supply and fixing straight through outdoor type heat shrinkable suitable for 33 KV , 300 Sqmmx3 core XLPE cable complete all as specified and as directed.

M&L for painting to 33 KV HT Steel pole structure and HT pole with cross arms, clamp of any length and shape with two coats of aluminium paint including preparation of the existing surfaces from top of PCC pedustal of structure complete after written shutdown at both end ie 33 KV MRS Airforce and 220KV Cantt Civil Power House complete all as specified and as directed.

Painting of transformer complete with radiator of capacity for 3150 KVA, 33/11 KV outdoor type after cleaning the body surface by rubbing with emery paper to remove oil strains, dust etc and appling two coat of heat resistance paint by spray paint including writing of SM/ MES No, capacity of transformer and date of installation complete all as specified and as directed

Replacement of Silica gel breather assembly with silica gel cristal for 3150 KVA capacity transformer complete all as specified and as directed. .

R.K.ASSOCIATES