SPECIAL REPAIRS/ REPLACEMENT OF OLD VINTAGE PUMP SETS, TRANSFORMERS, WATER PIPE LINE AND ITS ALLIED WORKS AT AF STATION TAMBARAM

Amount

Supply, installation, testing, commissioning of energy efficient (level 2) 250 kVA, 11/0.433 kV, oil immersed, ONAN cooled, 3- Phase step-down distribution transformer outdoor type suitable for 11 kV, 50 Hz distribution and conforming to IS: 1180 (Part- 1): 2014, including first filling of natural easter vegetable oil, conforming to IS: 16659- 2017, having dielectric breakdown strength ≥ 65 kV at 2.5mm gap, CRGO bolt-less prime grade core, M4 or better directly from reputed manufacturers like Nippon / Posco/ AK steels ensures high endurance of core HV & LV windings wound from super enamel covered electrolytic grade copper conductor with tapping on the HV winding for variation of HV voltage within range of +5% to -15% in steps of 2.5%, hermatically sealed corrugated tank, HV/LV cable boxes complete with all standard fittings/accessories and mounted on a platform as per manufecturer's recommendation as specified and directed. The transformer shall conform to the following specific parameters: [i] System Voltage: 11 kV [ii] Rated Voltage (HV/LV): 11 /0.433 kV [iii] Frequency: 50 Hz ±3% [iv] No. of Phases: 3 [v] Connection (HV/LV): Delta / Star (neutral brought out) [vi] Vector Group: Dyn-11 [vii] Type of Cooling: ONAN [viii] Audible Sound Level: < 75 dB [ix] Insulation Level: (1) HV Peak Impulse Voltage: 75 kV (2) HV Power Frequency Voltage: 28 kV (3) LV Power Frequency Voltage: 2 kV

[x] Impedance:4.50% [xi] Maximum Losses: (1) at 50% loading: 980W (2) at 100% loading: 2930W [xii] Cable Box Clearance: (1) HV: 127 mm Phase to Phase; 76 mm Phase to Earth (2) LV: 45 mm Phase to Phase; 20 mm Phase to Earth [xiii] Terminal Markings: (1) HV: 1U, 1V, 1W (2) LV: 2u, 2v, 2w, 2n [xiv] Off Circuit Tap Changer (OCTC): ±7.5% in steps of 2.5% The following standard fittings/accessories shall be provided along with the transformer: [i] Non-detachable rating & terminal marking plates [ii] Monogram plate [iii] Lifting lugs for main tank & top cover & jacking lugs [iv] Top filter valve [v] Drain cum bottom filter valve [vi] Oil sampling valve [vii] Earthing terminals with lugs: 2 Nos. [viii] Storage & instruction plate [ix] Skid type under base [x] Bi-directional plain/flange rollers [xi] Detachable type radiators with top & bottom shut-off valve [xii] WTI & OTI with alarm & trip contact [xiii] Marshalling box [xiv] Magnetic Oil level gauge low oil level alarm contact

Supply, installation, testing, commissioning of energy efficient (level 2) 315 kVA, 11/0.433 kV, oil immersed, ONAN cooled, 3- Phase step-down distribution transformer Indoor type suitable for 11 kV, 50 Hz distribution and conforming to IS: 1180 (Part- 1): 2014, including first filling of natural easter vegetable oil, conforming to IS: 16659- 2017, having dielectric breakdown strength ≥ 65 kV at 2.5mm gap, CRGO bolt-less prime grade core, M4 or better directly from reputed manufacturers like Nippon / Posco/ AK steels ensures high endurance of core HV & LV windings wound from super enamel covered electrolytic grade copper conductor with tapping on the HV winding for variation of HV voltage within range of +5% to -15% in steps of 2.5%, hermatically sealed corrugated tank, HV/LV cable boxes complete with all standard fittings/accessories and mounted on a platform as per manufecturer's recommendation as specified and directed. The transformer shall conform to the following specific parameters: [i] System Voltage: 11 kV [ii] Rated Voltage (HV/LV): 11 /0.433 kV [iii] Frequency: 50 Hz ±3% [iv] No. of Phases: 3 [v] Connection (HV/LV): Delta / Star (neutral brought out) [vi] Vector Group: Dyn-11 [vii] Type of Cooling: ONAN [viii] Audible Sound Level: < 75 dB [ix] Insulation Level: (1) HV Peak Impulse Voltage: 75 kV (2) HV Power Frequency Voltage: 28 kV (3) LV Power Frequency Voltage: 2 kV

[x] Impedance: 4.5% [xi] Maximum Losses: (1) at 50% loading: 1025W (2) at 100% loading: 3100W [xii] Cable Box Clearance: (1) HV: 127 mm Phase to Phase; 76 mm Phase to Earth (2) LV: 45 mm Phase to Phase; 20 mm Phase to Earth [xiii] Terminal Markings: (1) HV: 1U, 1V, 1W (2) LV: 2u, 2v, 2w, 2n [xiv] Off Circuit Tap Changer (OCTC): ±7.5% in steps of 2.5% The following standard fittings/accessories shall be provided along with the transformer: [i] Non-detachable rating & terminal marking plates [ii] Monogram plate [iii] Lifting lugs for main tank & top cover & jacking lugs [iv] Top filter valve [v] Drain cum bottom filter valve [vi] Oil sampling valve [vii] Earthing terminals with lugs: 2 Nos. [viii] Storage & instruction plate [ix] Skid type under base [x] Bi-directional plain/flange rollers [xi] Detachable type radiators with top & bottom shut-off valve [xii] WTI & OTI with alarm & trip contact [xiii] Marshalling box [xiv] Magnetic Oil level gauge low oil level alarm contact

Supply and laying LT UG cable 1100 gradeXLPE Insulated sheated armoured heavy duty in trenches/ducts//wall with standered aluminium conductor of 300 Sqmm x3.5 core completed inclduing connecting both ends complete all as specified and directed.

EXTERNAL WATER SUPPLY Supply,install and testing Electric driven,415 Volts ,three phase, coupled pump set,40 HP,30 KW, Head 50mtr, foundation as per manufactures design complete and taking down/dismantling of unserviceable existing pumpset and transport to MES stores for further disposal all as specified and as directed by Engineer-in-Charge.(Location: MES Complex Pump House). Make: Kirloskar (model No.DB 65/20 with CI impeller code83+CGL / BBL make 30KW/40HP, 2900RPM TEFC Motor) or equivalent make from KSB/Crompton greaves.

Supply,install and testing Electric driven,415 Volts ,three phase, monoblock pump set,10.0 HP,7.5KW,l Head 28mtr ,LPS 18 Litre,Suction and delivery pipe dia size 100/100 mm including base frame, PCC platform as per manufactures design complete and taking down/dismantling of unserviceable existing pumpset and transport to MES stores for further disposal all as specified and as directed by Engineer-in-Charge. (Location: Golden Jubilee Pump House). Make: Kirloskar (model No.KDS 1030) or equivalent make from KSB/Crompton greaves.

Supply,install and testing Electric driven,415 Volts ,three phase, monoblock pump set, 7.5 HP, 5.5KW, Head 40mtr, LPS-7.50 Litre,Suction and delivery pipe dia size 65/50mm including base frame,PCC platform as per manufactures design complete and taking down/dismantling of unserviceable existing pumpset and transport to MES stores for further disposal all as specified and as directed by Engineer-in-Charge. (Location: Old booster P/H -01No, Narendra Place P/H-02Nos). Make: Kirloskar (model No.KDS 852+) or equivalent make from KSB/Crompton greaves.

Supply,install and testing Electric driven,415 Volts ,three phase, monoblock pump set, 5 HP, 3.7KW,Total Head 30mtr ,LPS 7.60Litre,Suction and delivery pipe dia size 65/50 mm including base frame,PCC platform as per manufactures design complete and taking down/dismantling of unserviceable existing pumpset and transport to MES stores for further disposal all as specified and as directed by Engineer-in-Charge. (Location: New Booster P/H, S/Pool P/H) Make: Kirloskar (model No.KDS 538+) or equivalent make from KSB/Crompton greaves.

Supply,install and testing Electric driven,415 Volts ,three phase, monoblock pump set, 2 HP,1.50KW,Total Head 22mtr ,LPS 3.5Litre,Suction and delivery pipe dia size 50/40 mm including base frame,PCC platform as per manufactures design complete and taking down/dismantling of unserviceable existing pumpset and transport to MES stores for further disposal all as specified and as directed by Engineer-in-Charge. (Location:9 P&S Pump House).Make: Kirloskar (model No.KDS 225+) or equivalent make from KSB/Crompton greaves.

Supply,install and testing Electric driven,415 Volts ,three phase, Open well type Submercible pump set ,5 HP, 3.7KW,Total Head 30mtr ,LPS 1.0 Litre,Suction and delivery pipe dia size 50/40 mm including base frame, as per manufactures design complete and taking down/dismantling of unserviceable existing pumpset and transport to MES stores for further disposal all as specified and as directed by Engineer-in-Charge. (Location: New Shastri Well-02, Golf Well-02 Nos). Make: Kirloskar (model No.KOS 550+) or equivalent make from KSB/Crompton greaves.

Supply,install and testing Electric driven,415 Volts ,three phase, Self priming , Non Clog coupled pump set12.5HP,9.3KW,1450 RPM,Total Head 25mtr ,LPS 14.0Litre,Suction and delivery pipe dia size 100/100 mm including base frame,PCC platform as per manufactures design complete and taking down/dismantling of unserviceable existing pumpset and transport to MES stores for further disposal all as specified and as directed by Engineer-in-Charge. (Location: main Camp Sewage P/H-02 Nos, Madambakkam Sewage P/h-02Nos). Make: Kirloskar (model No.SP4L+12.5C4) or equivalent make from KSB/Crompton greaves.

Supply and fixing in replacement CI sluice valve of size 100 mm dia confirming to IS -14846 PN-1.6 non raising type both ends flanged with SS spindle including jointing materials such as 3mm rubber gasket 02 Nos for pump set delivery line complete all as specified and directed. (For pump set)

Supply and fix in repairs CI Non Return valve conforming to IS-5312 Part - I ,PN 1.0 ,having flanged end joints suitable size of 100 mm dia with brass seating including jointing materials such as 3mm rubber gasket 02 Nos etc r pump set delivery line complete all as directed .(For pump set)

Supply and fix in repairs Gun metal globe or gate valves, with iron wheel head, screwed both ends for iron pipe of size 50mm dia r pump set delivery line complete all as specified and directed.

All as per item No.13 but of size 25mm dia

Supply and fix Gun metal Non Return Sluice Valve of size 50mm bore ISI marked suitable for screwing in GI pipes fixed r pump set delivery line all as specified and as directed(For pump set).

Supply and fix in repair galvanised iron bolt,nut and washers of any dia and length as required at site all as specified and as directed.

M&L for Wiring for circuit/submain wiring along with earth wire with the following sizes of HRFR, PVC insulated unsheathed, industrial grade copper conductor, single core, flexible cables,1100 volts conforming to IS-694 drawn in existing cable ducts/racks/pipes in surface/recessed as required for connections from panel to pump motors including taking down/dismantling of existing unserviceable/burnt copper conductors all as specified and as directed by engineer in charge. (a) 10 Sqmm

(b) 6.0 Sqmm

(c) 4.0 Sqmm

REPAIR TO WATER PIPE LINES: Excavation in trenches not exceeding 1.5 metre wide and not exceeding 1.5 metre depth and getting out in hard/dense soil for taking out / laying of GI pipe all as directed by Engineer-in-charge..

Returning and filling including spreading, leveling, watering and well remming in layer n-exc 25 mm thick in soft/loose soil complete all as specified and as directed.

Removing excavated soil to a distance not exceeding 50 mtrs and depositing where directed at a level not exceeding 1.5 Mtr above the starting point all as specified and directed.

M & L for taking up or down from trenches old GI Pipe including fittings and branch connections if any for cleaning and refixing or removal to stores for further disposal of size 100mm dia CI Pipe complete all as specified and directed.

All as per item No.23 but GI Pipe of size 80mm dia

All as per item No.23 but GI pipe of size 50mm dia

All as per item No.23 but GI pipeof size 40mm dia

All as per item No.23 but GI pipe of size 25mm dia

All as per item No.23 but GI pipe of size 20mm dia

All as per item No.23 but GI pipe of size 15mm dia

M & L for Re-fixing old serviceable steel tubing and connections in new or old position of size 50mm dia (walls, ceiling, floors, etc) complete all as specified and directed.

All as per item No.30 but of size 40mm dia complete all as specified and directed.

All as per item No.30 but of size 25mm dia complete all as specified and directed.

All as per item No.30 but of size 20mm dia complete all as specified and directed.

All as per item No.30 but of size 15mm dia complete all as specified and directed.

Supply and lay of the GI pipe 100mm dia medium grade including fittings such as bends, reducer, elbows, union etc in trenches complete all as specified and directed.

All as per item No.35 but GI pipe 80mm dia complete all as specified and directed.

All as per item No.35 but GI pipe 50mm dia complete all as specified and directed.

All as per item No.35 but GI pipe 40mm dia complete all as specified and directed.

All as per item No.35 but GI pipe 25mm dia complete all as specified and directed.

All as per item No.35 but GI pipe 20mm dia complete all as specified and directed.

All as per item No.35 but GI pipe 15mm dia complete all as specified and directed.

Supply and fix GI pipe 100mm dia medium grade including fittings such as bends, reducer, elbows, union, clips, wall hooks, wooden plugs etc in wall/floor/sump/wells. including cutting through wall/floor/sump/wells and making good the distrubed surfaces to match with existing for suction and delivery lines of the pump sets complete all as specified and directed.(for pump suction and delivery)

All as per item No.42 but GI pipe 50mm dia complete all as specified and directed.

All as per item No.42 but GI pipe 25mm dia complete all as specified and directed.

All as per item No.42 but GI pipe 20mm dia complete all as specified and directed.

All as per item No.42 but GI pipe 15mm dia complete all as specified and directed.

Cutting of existing road/ floor/ plinth/drain of any description of width and depth not exeeding 0.45 metre for taking out /laying of GI pipe line including necessary earth work excavation and making good the distrubed surface with PCC 1:3:6 type C2using 40mm graded stone aggregate complete all as specified.

Plain cement concrete 1:3:6 type C1 using 20mm graded stone aggregate as in foundation for valve chamber etc all as specified and as directed.

Brick work with sub class "B" bricks using old size bricks straight or curved on plan exc 6m mean radius,built in cement mortor 1:6 as in valve chamber complete all as specified and as directed.

Rendring 10mm thick on fair faces of bricks(inside of valve chamber) in cement mortor 1:4 finished the surface even and smooth without using extra cement,complete all as specified and as directed.

Mild steel chamber cover made with mild steel sheet of 3.0mm thick for shutter angle iron frame including necessory welding and fixing arrangement and applying two coats of synthetic enamel paint over a coat of metal primer etc complete including taking down old MS sheet cover all as specified and as directed.

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