SPECIAL REPAIRS FOR REPLACEMENT OF BER TRANSFORMER, HT EQUIPMENTS AND CONNECTED ITEMS AT NSTL UNDER AGE I RND NSTL VISAKHAPATNAM

Amount

Dismantling / removing the existing distribution transformer 11 KV/0.433 KV of capacity 250 KVA to 800 KVA from site carefully disconnecting all incoming and outgoing electric connections after taking proper shut down from concerned JE E/M and AGE E/M, following all safety precautions without any damage to transformer using tools & plants and depositing the same in the MES storeyard of AGE E/M complete all as directed.

Dismantling / removing the existing Power transformer 33 KV/11 KV of capacity 3150 KVA to 5000 KVA from site carefully disconnecting all incoming and outgoing electric connections after taking proper shut down from concerned JE E/M and AGE E/M, following all safety precautions without any damage to transformer using tools & plants and depositing the same in the MES storeyard of AGE E/M complete all as directed.

Dismantling / removing the existing 11 KV VCB/OCB panels of any capacity & any make from site carefully disconnecting all incoming and outgoing electric connections after taking proper shut down from concerned JE E/M and AGE E/M, following all safety precautions without any damage to transformer using tools & plants and depositing the same in the MES storeyard of AGE E/M complete all as directed.

Supply, install, testing & commissioning of 250 KVA step down indoor type transformer complete with standard fittings HT 11 KV, LT 433 volts, 50 Hz, 3 phase, 4 wire system with super enamelled copper double wound and off load tapings on HT side to vary secondary voltage +5% to -10% @ 2.5% (6 Steps/7 Positions) in step by step continuous rating, cable termination box type on LT side of capacity all as per 1180 (Part-I) : 2014 Energy Efficiency Level-2 (Amendment-4) (formerly EEL-3 till 30 Mar 2022) and equipped with following: -

(a) Rating of Transformer 250 KVA (b) Voltage ratio 11 KV/0.433 KV (c) Winding material super enamelled copper (d) Ref standard IS:1180 (Part I) : 2014 Amendment No. 04. (e) Energy Efficiency level: LEVEL 2, ISI marked, BIS License No. (f) Phase: 3 Phase (g) Service: indoor type (h) Mounting: floor (j) Wound: Double (k) Temperature rise in oil: 40 degree Centigrade (l) By resistance: 45 degree Centigrade (m) Ambient temperature; 50 degree Centigrade (n) Winding material: Copper

(o) Type of cooling: ONAN (p) Class of insulation: Class A (q) Vector group: Dyn11 (r) Frequency: 50Hz (s) Insulation level HV (KVp/KV rms): 75/28 (t) Insulation level LV (KVp/KV rms): /3 (u) Tapping on HV side for giving voltage variation of HV: +5% to -10% @ 2.5% (6 Steps/7 Positions) (v) Type of tap changer: Off circuit tap switch (w) Termination (HV/LV/Orientation): Cable box / 180 degree

(x) Total losses at 50% load: 0.920 KW (max) Level-2 (y) Total losses at 100% load: 2.70 KW (max) Level-2 (z) Impedance at rated current: 4.5% (IS Tolerance) (aa) Paint: Polyurethane shade 631 of IS-5 & Hot dip galvanizing for corrosion protection & long durability. (ab) Primary / Secondary Connections: Delta / Star (ac) First fill of new transformer oil IS 335 marked fitered & tested for di electric strength not less than 42 KV at 2.0 mm gap between testing electrodes. (ad) Bushings HV porcelain 03 Nos & LV Epoxy bushings 04 Nos.

(ae) Dehydrating breather with first fill of dehydrating agent (Silica gel) (af) Standard fittings & accessories Stem Type OTI, Prismatic Oil level Gauge, Top Oil filter valve, Inspection Cover, Bottom Oil filter cum drain valve, Air release Plug, Conservator with oil filling cap and drain plug, Explosive Vent with Diaphragm & Equalizer Pipe, Bidirectional Flat Rollers - 04 Nos, Earthing Terminals - 02 Nos, lifting lugs, Rating & Diagram Plate.

Supply, install, testing & commissioning of 250 KVA step down outdoor type transformer complete with standard fittings HT 11 KV, LT 433 volts, 50 Hz, 3 phase, 4 wire system with super enamelled copper double wound and off load tapings on HT side to vary secondary voltage +5% to -10% @ 2.5% (6 Steps/7 Positions) in step by step continuous rating, cable termination box type on LT side of capacity all as per 1180 (Part-I) : 2014 Energy Efficiency Level-2 (Amendment-4) (formerly EEL-3 till 30 Mar 2022) and equipped with following:-

(a) Rating of Transformer 250 KVA (b) Voltage ratio 11 KV/0.433 KV (c) Winding material super enamelled copper (d) Ref standard IS:1180 (Part I) : 2014 Amendment No. 04. (e) Energy Efficiency level: LEVEL 2, ISI marked, BIS License No. (f) Phase: 3 Phase (g) Service: Outdoor type (h) Mounting: Plinth (j) Wound: Double (k)Temperature rise in oil: 40 degree Centigrade (l) By resistance: 45 degree Centigrade (m) Ambient temperature; 50 degree Centigrade (n) Winding material: Copper

(o) Type of cooling: ONAN (p) Class of insulation: Class A (q) Vector group: Dyn11 (r) Frequency: 50Hz (s) Insulation level HV (KVp/KV rms): 75/28 (t) Insulation level LV (KVp/KV rms): /3 (u) Tapping on HV side for giving voltage variation of HV: +5% to -10% @ 2.5% (6 Steps/7 Positions) (v) Type of tap changer: Off circuit tap switch (w) Termination (HV & LV/Orientation): Cable box/180 degree

(x) Total losses at 50% load: 0.920 KW (max) Level-2 (y) Total losses at 100% load: 2.70 KW (max) Level-2 (z) Impedance at rated current: 4.5% (IS Tolerance) (aa) Paint: Polyurethane Shade 631 of IS-5 & Hot dip galvanizing for corrosion protection & long durability. (ab) Primary / Secondary Connections: Delta / Star

(ac) First fill of new transformer oil IS 335 marked fitered & tested for di electric strength not less than 42 KV at 2.0 mm gap between testing electrodes. (ad) Bushings HV porcelain 03 Nos & LV Epoxy bushings - 04 Nos. (ae) Dehydrating breather with first fill of dehydrating agent (Silica gel) (af) Standard fittings & accessories Stem Type OTI, Prismatic Oil level Gauge, Top Oil filter valve, Inspection Cover, Bottom Oil filter cum drain valve, Air release Plug, Conservator with oil filling cap and drain plug, Explosive Vent with Diaphragm & Equalizer Pipe, Bidirectional Flat Rollers - 04 Nos, Earthing Terminals - 02 Nos, lifting lugs, Rating & Diagram Plate.

Supply, install, testing & commissioning of 315 KVA step down outdoor type transformer complete with standard fittings HT 11 KV, LT 433 volts, 50 Hz, 3 phase, 4 wire system with super enamelled copper double wound and off load tapings on HT side to vary secondary voltage +5% to -10% @ 2.5% (6 Steps/7 Positions) in step by step continuous rating, cable termination box type on LT side of capacity all as per 1180 (Part-I) : 2014 Energy Efficiency Level-2 (Amendment-4) (formerly EEL-3 till 30 Mar 2022) and equipped with following:-

(a) Rating of Transformer 315 KVA (b) Voltage ratio 11 KV/0.433 KV (c) Winding material super enamelled copper (d) Ref standard IS:1180 (Part I) : 2014 Amendment No. 04. (e) Energy Efficiency level: LEVEL 2, ISI marked, BIS License No. (f) Phase: 3 Phase (g) Service: Outdoor type (h) Mounting: Plinth (j) Wound: Double (k) Temperature rise in oil: 40 degree Centigrade

(l) By resistance: 45 degree Centigrade (m) Ambient temperature; 50 degree Centigrade (n) Winding material: Copper (o) Type of cooling: ONAN (p) Class of insulation: Class A (q) Vector group: Dyn11 (r) Frequency: 50Hz (s) Insulation level HV (KVp/KV rms): 75/28 (t) Insulation level LV (KVp/KV rms): /3 (u) Tapping on HV side for giving voltage variation of HV: +5% to -10% @ 2.5% (6 Steps/7 Positions) (v) Type of tap changer: Off circuit tap switch (w) Termination (HV & LV/Orientation): Cable box / 180 degree

(x) Total losses at 50% load: 0.955 KW (max) Level-2 (y) Total losses at 100% load: 2.750 KW (max) Level-2 (z) Impedance at rated current: 4.5% (IS Tolerance) (aa) Paint: Polyurethane Shade 631 of IS-5 & Hot dip galvanizing for corrosion protection & long durability. (ab) Primary / Secondary Connections: Delta / Star (ac) First fill of new transformer oil IS 335 marked fitered & tested for di electric strength not less than 42 KV at 2.0 mm gap between testing electrodes. (ad) Bushings HV porcelain 03 Nos & LV Epoxy bushings - 04 Nos. (ae) Dehydrating breather with first fill of dehydrating agent (Silica gel)

(af) Standard fittings & accessories Stem Type OTI, Prismatic Oil level Gauge, Top Oil filter valve, Inspection Cover, Bottom Oil filter cum drain valve, Air release Plug, Conservator with oil filling cap and drain plug, Explosive Vent with Diaphragm & Equalizer Pipe, Bidirectional Flat Rollers - 04 Nos, Earthing Terminals - 02 Nos, lifting lugs, Rating & Diagram Plate.

Supply, install, testing & commissioning of 400 KVA step down indoor type transformer complete with standard fittings HT 11 KV, LT 433 volts, 50 Hz, 3 phase, 4 wire system with super enamelled copper double wound and off load tapings on HT side to vary secondary voltage +5% to -10% @ 2.5% (6 Steps/7 Positions) in step by step continuous rating, cable termination box type on LT side of capacity all as per 1180 (Part-I) : 2014 Energy Efficiency Level-2 (Amendment-4) (formerly EEL-3 till 30 Mar 2022) and equipped with following:-

(a) Rating of Transformer 400 KVA (b) Voltage ratio 11 KV/0.433 KV (c) Winding material super enamelled copper (d) Ref standard IS:1180 (Part I) : 2014 Amendment No. 04. (e) Energy Efficiency level: LEVEL 2, ISI marked, BIS License No. (f) Phase: 3 Phase (g) Service: indoor type (h) Mounting: floor (j) Wound: Double (k) Temperature rise in oil :40 degree Centigrade (l) By resistance: 45 degree Centigrade (m) Ambient temperature; 50 degree Centigrade (n) Winding material: Copper (o) Type of cooling: ONAN (p) Class of insulation: Class A (q) Vector group: Dyn11

(r) Frequency: 50Hz (s) Insulation level HV (KVp/KV rms): 75/28 (t) Insulation level LV (KVp/KV rms): /3 (u) Tapping on HV side for giving voltage variation of HV: +5% to -10% @ 2.5% (6 Steps/7 Positions) (v) Type of tap changer: Off circuit tap switch (w) Termination (HV & LV/Orientation): Cable box / 180 degree (x) Total losses at 50% load: 1.150 KW (max) Level-2 (y) Total losses at 100% load: 3.330 KW (max) Level-2 (z) Impedance at rated current: 4.5%(IS Tolerance) (aa) Paint: Polyurethane Shade 631 of IS-5 & Hot dip galvanizing for corrosion protection & long durability.

(ab) Primary / Secondary Connections: Delta / Star (ac) First fill of new transformer oil IS 335 marked fitered & tested for di electric strength not less than 42 KV at 2.0 mm gap between testing electrodes. (ad) Bushings HV porcelain 03 Nos & LV Epoxy bushings - 04 Nos. (ae) Dehydrating breather with first fill of dehydrating agent (Silica gel) (af) Standard fittings & accessories Stem Type OTI, Prismatic Oil level Gauge, Top Oil filter valve, Inspection Cover, Bottom Oil filter cum drain valve, Air release Plug, Conservator with oil filling cap and drain plug, Explosive Vent with Diaphragm & Equalizer Pipe, Bidirectional Flat Rollers - 04 Nos, Earthing Terminals - 02 Nos, lifting lugs, Rating & Diagram Plate.

Supply, install, testing & commissioning of 400 KVA step down outdoor type transformer complete with standard fittings HT 11 KV, LT 433 volts, 50 Hz, 3 phase, 4 wire system with super enamelled copper double wound and off load tapings on HT side to vary secondary voltage +5% to -10% @ 2.5% (6 Steps/7 Positions) in step by step continuous rating, cable termination box type on LT side of capacity all as per 1180 (Part-I) : 2014 Energy Efficiency Level-2 (Amendment-4) (formerly EEL-3 till 30 Mar 2022) and equipped with following: -

(a) Rating of Transformer 400 KVA (b) Voltage ratio 11 KV/0.433 KV (c) Winding material super enamelled copper (d) Ref standard IS:1180 (Part I) : 2014 Amendment No. 04. (e) Energy Efficiency level: LEVEL 2, ISI marked, BIS License No. (f) Phase: 3 Phase (g) Service: Outdoor type (h) Mounting: Plinth (j) Wound: Double (k)Temperature rise in oil: 40 degree Centigrade (l) By resistance: 45 degree Centigrade (m) Ambient temperature; 50 degree Centigrade (n) Winding material: Copper (o) Type of cooling: ONAN (p) Class of insulation: Class A (q) Vector group: Dyn11

(r) Frequency: 50Hz (s) Insulation level HV (KVp/KV rms): 75/28 (t) Insulation level LV (KVp/KV rms): /3 (u) Tapping on HV side for giving voltage variation of HV: +5% to -10% @ 2.5% (6 Steps/7 Positions) (v) Type of tap changer: Off circuit tap switch (w) Termination (HV & LV/Orientation): Cable box / 180 degree

(x) Total losses at 50% load: 1.150 KW (max) Level-2 (y) Total losses at 100% load: 3.330 KW (max) Level-2 (z) Impedance at rated current: 4.5% (IS Tolerance) (aa) Paint: Polyurethane Shade 631 of IS-5 & Hot dip galvanizing for corrosion protection & long durability. (ab) Primary / Secondary Connections: Delta / Star (ac) First fill of new transformer oil IS 335 marked fitered & tested for di electric strength not less than 42 KV at 2.0 mm gap between testing electrodes. (ad) Bushings HV porcelain 03 Nos & LV Epoxy bushings 04 Nos. (ae) Dehydrating breather with first fill of dehydrating agent (Silica gel)

(af) Standard fittings & accessories Stem Type OTI, Prismatic Oil level Gauge, Top Oil filter valve, Inspection Cover, Bottom Oil filter cum drain valve, Air release Plug, Conservator with oil filling cap and drain plug, Explosive Vent with Diaphragm & Equalizer Pipe, Bidirectional Flat Rollers - 04 Nos, Earthing Terminals - 02 Nos, lifting lugs, Rating & Diagram Plate.

Supply, install, testing & commissioning of 630 KVA step down indoor type transformer complete with standard fittings HT 11 KV, LT 433 volts, 50 Hz, 3 phase, 4 wire system with super enamelled copper double wound and off load tapings on HT side to vary secondary voltage +5% to -10% @ 2.5% (6 Steps/7 Positions) in step by step continuous rating, cable termination box type on LT side of capacity all as per 1180 (Part-I) : 2014 Energy Efficiency Level-2 (Amendment-4) (formerly EEL-3 till 30 Mar 2022) and equipped with following: -

(a) Rating of Transformer 630 KVA (b) Voltage ratio 11 KV/0.433 KV (c) Winding material super enamelled copper (d) Ref standard IS:1180 (Part I) : 2014 Amendment No.04. (e) Energy Efficiency level: LEVEL 2, ISI marked, BIS License No. (f) Phase: 3 Phase (g) Service: indoor type (h) Mounting: floor (j) Wound: Double (k)Temperature rise in oil: 40 degree Centigrade (l) By resistance: 45 degree Centigrade (m) Ambient temperature; 50 degree Centigrade (n) Winding material: Copper (o) Type of cooling: ONAN (p) Class of insulation: Class A (q) Vector group: Dyn11 (r) Frequency: 50Hz

(s) Insulation level HV (KVp/KV rms): 75/28 (t) Insulation level LV (KVp/KV rms): /3 (u) Tapping on HV side for giving voltage variation of HV: +5% to -10% @ 2.5% (6 Steps/7 Positions) (v) Type of tap changer: Off circuit tap switch (w) Termination (HV & LV/Orientation): Cable box / 180 degree (x) Total losses at 50% load: 1.745 KW (max) Level-2 (y) Total losses at 100% load: 4.850 KW (max) Level-2 (z) Impedance at rated current: 4.5% (IS Tolerance) (aa) Paint: Polyurethane Shade 631 of IS-5 & Hot dip galvanizing for corrosion protection & long durability. (ab) Primary / Secondary Connections: Delta / Star

(ac) First fill of new transformer oil IS 335 marked fitered & tested for di electric strength not less than 42 KV at 2.0 mm gap between testing electrodes. (ad) Bushings HV porcelain 03 Nos & LV Epoxy bushings 04 Nos. (ae) Dehydrating breather with first fill of dehydrating agent (Silica gel) (af) Gas operated Buchholz relay. (ag) Standard fittings & accessories Stem Type OTI, Prismatic Oil level Gauge, Top Oil filter valve, Inspection Cover, Bottom Oil filter cum drain valve, Air release Plug, Conservator with oil filling cap and drain plug, Explosive Vent with Diaphragm & Equalizer Pipe, Bidirectional Flat Rollers - 04 Nos, Earthing Terminals - 02 Nos, lifting lugs, Rating & Diagram Plate.

Supply, install, testing & commissioning of 800 KVA step down outdoor type transformer complete with standard fittings HT 11 KV, LT 433 volts, 50 Hz, 3 phase, 4 wire system with super enamelled copper double wound and off load tapings on HT side to vary secondary voltage +5% to -10% @ 2.5% (6 Steps/7 Positions) in step by step continuous rating, cable termination box type on LT side of capacity all as per 1180 (Part-I) : 2014 Energy Efficiency Level-2 (Amendment-4) (formerly EEL-3 till 30 Mar 2022) and equipped with following: - (a) Rating of Transformer 800 KVA (b) Voltage ratio 11 KV/0.433 KV (c) Winding material super enamelled copper (d) Ref standard IS:1180 (Part I) : 2014 Amendment No.04. (e) Energy Efficiency level: LEVEL 2, ISI marked, BIS License No. (f) Phase: 3 Phase

(g) Service: Outdoor type (h) Mounting: Plinth (j) Wound: Double (k) Temperature rise in oil: 40 degree Centigrade (l) By resistance: 45 degree Centigrade (m) Ambient temperature; 50 degree Centigrade (n) Winding material: Copper (o) Type of cooling: ONAN (p) Class of insulation: Class A (q) Vector group: Dyn11 (r) Frequency: 50Hz (s) Insulation level HV (KVp/KV rms): 75/28 (t) Insulation level LV (KVp/KV rms): /3 (u) Tapping on HV side for giving voltage variation of HV: +5% to -10% @ 2.5% (6 Steps/7 Positions) (v) Type of tap changer: Off circuit tap switch (w) Termination (HV & LV/Orientation): Cable box / 180 degree

(x) Total losses at 50% load: 2.147 KW (max) Level-2 (y) Total losses at 100 % load: 5.837 KW (max) Level-2 (z) Impedance at rated current: 4.5% (IS Tolerance) (aa) Paint: Polyurethane Shade 631 of IS-5 & Hot dip galvanizing for corrosion protection & long durability. (ab) Primary / Secondary Connections: Delta / Star (ac) First fill of new transformer oil IS 335 marked fitered & tested for di electric strength not less than 42 KV at 2.0 mm gap between testing electrodes. (ad) Bushings HV porcelain 03 Nos & LV Epoxy bushings 04 Nos. (ae) Dehydrating breather with first fill of dehydrating agent (Silica gel)

(af) Gas operated Buchholz relay. (ag) Standard fittings & accessories Stem Type OTI, Prismatic Oil level Gauge, Top Oil filter valve, Inspection Cover, Bottom Oil filter cum drain valve, Air release Plug, Conservator with oil filling cap and drain plug, Explosive Vent with Diaphragm & Equalizer Pipe, Bidirectional Flat Rollers-04 Nos, Earthing Terminals-02 Nos, lifting lugs, Rating & Diagram Plate. Note for Sl item Nos. 4 to 10: (i) Rate quoted shall be deemed to include the cost of necessary earth work, foundation / platform for outdoor transformer mounting as per OEM recommendations including dismantling existing foundation. (ii) Transformer drawings should be submitted by contractor within one month from date of commence of work and the same shall be approved by Accepting Officer before placing order.

(vi) Factory inspection shall be carried out in the presence of representative nominated by Accepting Officer for distribution transformer before despatch.

Supply, installation, testing & commissioning of power transformer step down, indoor type SCADA compatibility / Communication port of capacity 3150 KVA, HT 33 KV/11 KV, 3 phase, 50 cycles AC with on load tap changing arrangements with remote control panel operation on 33 KV sides to vary voltage from (+) 5% to (-) 15% in steps of 1.25% (16 steps/17 posotion), % impedance at rated frequency & Voltage at 75 degree (+10% to -10% tolreance) 6.25% at normal / common tap No. 5 at 75 degree celcius Maximum permissible no load loss at rated voltage and rated frequency is 2.8 KW and maximum permissible load loss at rated current, at normal tap and at 750C is 22.5 KW including suitable marshalling box and terminals 03 Nos outdoorHV bare bushings with socket, LV cable box (without cable glands) & LV side additional neutral with 01 No. solid porcelain type outdoor bushings with sockets on the

transformer lid for earthing purpose complete in all respects with standard accessories and fittings conforming to IS-2026, HV (primary) side delta and LV (secondary) side star connected including control panel of transformer. The salient features of the transformer shall be as under:- (a) (i) Transformer shall be Dyn-11 vector group oil immersed naturally cooled, double wound copper winding core type, Radiator cooled MS tank complete with first fill of transformer oil as per IS-335 with ONAN cooling system. The temperature of oil shall not rise 45 degree centigrade to ambient 55 degree centigrade of winding. Transformer shall be painted with two coats of synthetic enamel paint with two coats of expoxy Polyurethane Shade 631 of IS-5 complete all as specified and directed.

Standard Fittings: (i) Rating and diagram plate along with levels wherever necessary. (ii) Earthing terminals - 02 Nos. (iii) Lifting lugs. (iv) Thermometer pocket with thermometer. (v) Air release hole with plug. (vi) Oil filling hole with plug on & including conservator tank with drain valve and plug. (vii) Prismatic type oil indicator on one side of conservator tank with minimum and maximum oil level marking. (viii) Dehydrating breather - 01 No (ix) Oil conservator with drain valve and plug. (x) Sampling valves, top and bottom. (xi) Under base with flat treaded bi-directional rollers. (xii) Drain cum bottom filter valve with plug. (xiii) Top filter valve with plug.

(xiv) Explosion vent with diaphragm and equalizer pipe (pressure release valve). (xv) Jacking lugs and hauling holes. (xvi) Inspection cover. (xvii) Detachable radiators with shut off valves between radiators and tank. (xviii) Radiator with air release hole and plug. Oil drain hole with plug and lifting eye all as per manufacturer's standards. (xix) 150mm dia oil temperature indicator stems type (having Contacts for Alarm & Trip) (xx) Double float buchholtz relay with 02 sets of contacts and isolating valves (having Contacts for Alarm & Trip) (xxi) 150mm dia winding temperature indicator with maximum indicating pointer and resetting device (having Contacts for Alarm & Trip) (xxii) 100mm dia magnetic oil level gauge with low oil level alarm.

(xxiii) Terminal arrangements. (xxiv) Suitable wheels (width/distance should be as per existing broad gauge rails) - 04 Nos. (xxv) Marshalling box (having TTB only): A metal enclosed, weather, vermin and dust proof marshalling box fitted with required glands, locks, glass door, terminal board, heater with switch, illumination lamp with switch etc., shall be provided with each transformer to accommodate temperature indicators, terminal blocks etc., it shall have degree of protection of IP 55 or better as per IS: 2147. (xxvi) Insulation level of Bushing: HV LV i) Lightning Impulse withstand (KVP) 170 95 ii) 1 Minute Power Frequency withstand voltage (KV-rms) 70 28 iii) Creepage distance (mm) (minimum) 900 300

(x) Interlocking between manual and electric operation with and including followings:- (a) Handle for manual operation (b) Auxiliary Transformer. (xi) Main isolating switch with set off uses. (xii) Insulated terminal board (with connector) for transformer tap leads. (xiii) Mechanical tap position indicator with handle. (xiv) Tap changing operation counter. (xv) Rating plate. (xvi) Driving mechanism chamber locking arrangement. (xvii) Un-drilled gland plate for cable entry. (xviii) Terminalstrips. (xix) Drain cum filter valves. (xx) Stoppers to prevent over travelling of mechanism.

(xxi) Indoor floor mounted remote control cubicals (RTCC Panel, AVR relay) with rear accessories on HV side to vary secondary voltage as mentioned above with wiring and followings:- (a) Remote tap position indicating meter digital type. (b) Tap change in progress signal lamps with belt. (c) Raise / lower push buttons for remote operation. (d) Inside illuminating lamp with door switch. (e) Supply on signals. (f) Suitable class CTs for 3 core to suit full load on transformer. (xxii) Factory inspection shall be carried out in the presence of representative nominated by Accepting Officer for power transformer before despatch.

Supply, installation, testing & commissioning of power transformer step down, indoor type SCADA compatibility / communication port of capacity 5000 KVA, HT 33 KV/11 KV, 3 phase, 50 cycles AC with on load tap changing arrangements with remote control panel operation on 33 KV sides to vary voltage from (+) 5% to (-) 15% in steps of 1.25 % (16 steps/17 posotion), % impedance at rated frequency & Voltage at 75 degree (+10% to -10% tolreance) 7.15 % at normal / common tap No. 5 at 75 degree celcius Maximum permissible no load loss at rated voltage and rated frequency is 4.5 KW and maximum permissible load loss at rated current, at normal tap and at 750C is 34 KW as per IS tolerance including suitable marshalling box and terminals 03 Nos outdoor HV bare bushings with socket, LV cable box (without cable glands) & LV side additional neutral with 01

No. solid porcelain type outdoor bushings with sockets on the transformer lid for earthing purpose complete in all respects with standard accessories and fittings conforming to IS-2026, HV (primary) side delta and LV (secondary) side star connected including control panel of transformer. The salient features of the transformer shall be as under:- (a) (i) Transformer shall be Dyn-11 vector group oil immersed naturally cooled, double wound copper winding core type, Radiator cooled MS tank complete with first fill of transformer oil as per IS-335 with ONAN cooling system. The temperature of oil shall not rise 45 degree centigrade to ambient 55 degree centigrade of winding. Transformer shall be painted with 02 coats of synthetic enamel paint with 02 coats of expoxy Polyurethane Shade 631 of IS-5 complete all as specified and directed.

Standard Fittings: (i) Rating and diagram plate along with levels wherever necessary. (ii) Earthing terminals - 02 Nos. (iii) Lifting lugs. (iv) Thermometer pocket with thermometer. (v) Air release hole with plug. (vi) Oil filling hole with plug on & including conservator tank with drain valve and plug. (vii) Prismatic type oil indicator on one side of conservator tank with minimum and maximum oil level marking. (viii) Dehydrating breather - 01 No (ix) Oil conservator with drain valve and plug. (x) Sampling valves, top and bottom. (xi) Under base with flat treaded bi-directional rollers. (xii) Drain cum bottom filter valve with plug. (xiii) Top filter valve with plug. (xiv) Explosion vent with diaphragm and equalizer pipe (pressure release valve). (xv) Jacking lugs and hauling holes.

(xvi) Inspection cover. (xvii) Detachable radiators with shut off valves between radiators and tank. (xviii) Radiator with air release hole and plug. Oil drain hole with plug and lifting eye all as per manufacturer's standards. (xix) 150mm dia oil temperature indicator stems type (having Contacts for Alarm & Trip) (xx) Double float buchholtz relay with two sets of contacts and isolating valves (having Contacts for Alarm & Trip (xxi) 150mm dia winding temperature indicator with maximum indicating pointer and resetting device (having Contacts for Alarm & Trip) (xxii) 100mm dia magnetic oil level gauge with low level alarm. (xxiii) Terminal arrangements. (xxiv) Suitable wheels (width/distance should be as per broad gauge rails)-04 Nos.

(xxv) Marshalling box (having TTB only): A metal enclosed, weather, vermin and dust proof marshalling box fitted with required glands, locks, glass door, terminal board, heater with switch, illumination lamp with switch etc., shall be provided with each transformer to accommodate temperature indicators, terminal blocks etc., iIt shall have degree of protection of IP 55 or better as per IS: 2147. (xxvi) Indoor type remote tap changer control panel (RTCC) with automatic voltage regulator, suitable size cable from OLTC and necessary indications. (xxvii) Insulation levels for windings: 33 kV 11 kV a) 1.2 / 50 microsecond wave shape Impulse withstand (KVP) 170 95 b) Power frequency voltage withstand (KVrms) 70 28.

(xvii) Un-drilled gland plate for cable entry. (xviii) Terminal strips. (xix) Drain cum filter valves. (xx) Stoppers to prevent over travelling of mechanism. (xxi) Indoor floor mounted remote control cubicals (RTCC Panel, AVR relay) with rear accessories on HV side to vary secondary voltage as mentioned above with wiring and followings:- (a) Remote tap position indicating meter digital type. (b) Tap change in progress signal lamps with belt. (c) Raise / lower push buttons for remote operation. (d) Inside illuminating lamp with door switch. (e) Supply on signals. (f) Suitable class CTs for 3 core to suit full load on transformer.

Note for Sl item Nos. 11 & 12: DRAWINGS / DOCUMENTS SHALL BE SUBMITTED TO DEPARTMENT: a) General outline drawing showing shipping dimensions and overall dimensions, net weights and shipping weights, quality of insulating oil, spacing of wheels in either direction of motion, marshalling box and tap changers etc. b) Assembly drawings of core, windings etc. and weights of main components / parts. c) Height of center line on HV & LV connectors of transformers from the rail top level. d) GA drawings / details of various types of bushing. e) Tap changing and name plate diagram f) Type test certificates of the quoted rating transformer. g) The drawings and type test certificates of tap changer.

h) Maintenance and operating instructions. j) The type test certificates in complete shape for Lightning Impulse‟ and Short Circuit‟ Test and Temperature Rise Test Routine Tests:- Transformer routine tests shall include tests stated in latest issue of IS: 2026 (Part-1). These tests shall also include but shall not be limited to the following: - (i) Measurement of winding DC resistance. (ii) Voltage ratio on each tapping and check of voltage vector relationship. (iii) Impedance voltage at all tappings. (iv) Magnetic circuit test as per relevant ISS or CBIP manual or latest standard being followed. (v) Measurement of load losses at normal tap and extreme taps. (vi) No load losses and no load current at rated voltage and rated frequency, also at 25% to 121% of rated voltage in steps.

(vii) Absorption index i.e., insulation resistance for 15 seconds and 60 seconds (R 60/R 15) and polarization index i.e., Insulation Resistance for 10 minutes and one minute (R 10 mt/R 1 mt). (viii) Induced over voltage withstand test. (ix) Separate source voltage withstand test. (x) Tan delta measurement and capacitance of each winding to earth (with all other windings earthed) & between all windings connected together to earth. (xi) Measurement of zero sequence impedance. (xii) Tests on On-Load tap changer (fully assembled on transformer) as per IEC: 214/1976 and BS: 4571/1970. (xiii) Auxiliary circuit tests. (xiv) Oil BDV tests. (xv) Measurement of neutral unbalance current which shall not exceed 2% of the full rated current of the transformer.

(xvi) Magnetic balance test. (xvii) Leakage test. (xviii) Turns Ratio test. (xix) Factory inspection shall be carried out in the presence of representative nominated by Accepting Officer for power transformer before despatch.

Supply, installation, testing & commissioning of AISI-304 stainless steel punch grid type neutral grounding resistor housed in 2mm CRCA sheet enclosure having the following technical specifications including taking down of old NGR panel: - a) Rated Voltage: 11 KV b) Rated Current: 100 Amps c) Rated Resistance: 63.5 Ohms d) Time rating: 10 Sec e) Temp rise: 375 Degree centigrade f) Resistor element connection: Series connection g) Ref standard: IEEE-32 h) Degree of protection: IP 55 j) Type of NGR: PSS & indoor type

Note: (i) Resistance grids are made of high resistance, non aging & non rusting stainless steel grade AISI 304 in punched grid design. The grids are mounted on insulated tie rods and intergrid connection is provided through bolted type construction. (ii) The grids assemblies mounted on end brackets and the assembly tiers are mounted one top other and are insulated from each other by interposing porcelain insulators. The total assembly of resitance tiers is mounted on 04 Nos. HT support insulators fitted on the base frame of the resistance enclosure. (iii) Resistor enclosure shall be self standing, natural air cooled type, suitable for outdoor duty. It shall be made of thickness 2mm CRCA sheet with hinged doors. The enclosure is mounted on 75 x 40 base channel which is provided with 04 mounting holes. Enclosure shall be suitable for indoor duty.

(iv) A separate cable box is attached to the resistance enclosure and one number HT bushing is provided in the cable box for connection to the including cable through a bottom gland plate. (v) Earth connection shall be taken from HT bushing provided in a separate compartment in the cable box for connection to earth strip. Earthing lugs 02 Nos. and lifting eye bolts 04 Nos. shall be provided in the enclosure. (vi) The enclosure shall be powder coated to shade -RAL 7032 & all standard items like space heaters, thermostat alonwith on/off switch, MCB, illumination lamp and LT terminal box shall included in above item.

M&L for providing earthing complete with galvanised steel earth plate electrode 600 x 600 x 6mm thick buried directly in ground earth pit not less than 2.25 metre deep below ground level with top edge of the plate not less than 1.5 metre below normal ground level connected to galvanised iron earth strip 32 x 6 mm as earthing lead by means of bolts, nuts, check nuts & washers of GI or steel and connecting to earth dolly all as shown in electrical plate No. 3 connected to earth test point all as specified and indicated including testing on complete all as specified and directed. Note: Earth continuity conductor and GI protection pipe beyond 7.5m shall be measured and paid under the respective items.

M&L for earthing continuity galvanised iron strip 32 x 6 mm dia or main earthing lead fixed to wall with clamps or recess or cross or buried in ground or drawn in conduits / pipe or fixed to poles or any other indicated situation for loop earthing etc as required complete all as specified and directed.

SITC of HT 11 KV VCB panel with incoming and outgoing cable box consisting of capacity 250 MVA, 400 Amps 11 KV VCB, indoor type VCB, extendable 25 KA/1 sec totally enclosed free standing, floor mounted type, compartment based with truck mounted VCB, spring operated electrically and manually charged operating mechanism suitable for horizontal isolation, horizontal drawout type VCBs with copper busbars, self supported insulated busbar with full voltage rated complete VCB panel conforming to IEC 62271-200 standards and IP 4X class of

protection comprising of necessary busbar extensions and connections circuit breaker suitable for E2, M2, C2 duty vacuum interrupters of the circuit breakers completely encapsulated in epoxy housing switch gear and control gear panels of fully arc proof IAC AFLR for 26.3 KA for 1 sec with micro processor based numerical relay communicable type in line with RS 485 Modbus protocol, comprising of three over current, one earth fault protection relay with high set for both phase and earth and with fault memory, universal aux supply, master trip relay, trip circuit supervision relay, digital multi functional meter with class 1.0, PT 11 KV/110 AC, Power pack 11 KV, 230 V AC complete all as specified and directed. Make of VCB: ABB / SCHNEIDER / SIEMENS / LEGRAND.

11 KV 400 Amps, 25 KA for 3 sec STC VCB panel-01 No. consisting of: (a) 400 Amps continous high conductivity electrolytic copper busbar, raychem insulated for full voltage, phase identification made at the end by coloured tape, busbar shall be mounted on integral seal of bushing and inter connection with electrolytic grade copper with joints silver painted. (b) Circuit breaker shall be mounted on with drawable truck which shall roll out horizontally from service position to isolated position with ease. (c) Motorised spring charged mechanism 230 V AC. (d) Cast resin transformer 11 KV, 200-100/1+1 Amp, 15 VA, CI 15 VA, CI 5P 10, CL:0.5-03 Nos. (e) Cast resin 3 phase PT 11 KV/110 Volts, 100 VA, CI 1.0-03 Nos with 3 Amps capacity PT fuses.

(l) Air insulated rear bottom & side entry cable box suitable for termination of HT XLPE 11 KV cables. (m) Anti pumping relay (VAA 11) - 01 No. Make: Siemens / ABB / SCHNEIDER / GE. (n) Power pack - 01 No. (o) Feeder protection relay with phase over current (50/51), directional phase over current (67), SOFT switch on to fault (50 HS), Current unbalance (46), thermal overload (49), earth fault (50N/51N), Directional earth fault (67N), under voltage (27), over voltage (59), zero sequence voltage protection (59N), frequency (81), auto reclose (79), Circuit breaker failure (50BF), cold load pick-up and magnetising inrush, programmable stages (99), CB wear. Relay shall have 4CT & 4VT inputs.

Relay shall be provided with atleast 16 digital inputs and 8 digital outputs and 1 self supervision output. Relay shall have also these features inbuilt. MIMIC display with single line representation and switch gear controls shall be possible through the MIMIC front USB for connecting to PC, conformal coating to withstand harsh environment, support PRP redudancy communication protocol on FO ports. Web server (web HMI) feature to monitor and control using LAN shall have minium 1000 events. Relay shall support SNTP time synchronization & support customer defined programmable logic with minium 8 programmable LED. Relay shall have disturbance recorder with settable sample rate from 8 cycle to 32 cycle or MICOM P3U30 or equivalent in make: ABB / CG / Siemens.

(p) Panel shall also have additional features like continous rated closing / tripping coils, spring charging handle, manual closing / tripping off the VCB with compartment door closed, short time rating 01 sec as per IEC 62271-200 and VCB shall be suitable for E2, M2, C2 class. (q) Breaker shall also be provided with Aux switch 6NO + 6NC contacts mounted on the draw out portion of the switch gear and position cell switch with 3 NO + 1 NC contact each for test position. (r) IAC AFLR 26.3 KA for 1 Sec. (s) 12 window annunciator. (t) TAFU card for Aux transfomer faults. (u) Painting: Two coats of synthetic zinc paint over a coat of zinc oxide primer. (v) Factory inspection shall be carried out in the presence of representative nominated by Accepting Officer for VCB before despatch.

SITC of HT 11 KV VCB line up four panels, stand alone switch boards consisting of capacity 350 MVA, 630 Amps VCB 11 KV -01 No. incomer and 630 Amps VCB 11 KV 03 Nos outgoing, indoor type VCB, extendable, 630 Amps, 25 KA/1 sec totally enclosed free standing, floor mounted type, compartment based with truck mounted VCB, spring operated electrically and manually charged operating mechanism suitable for horizontal isolation, horizontal draw out type VCBs with copper busbars, self supported insulated busbar with full voltage rated complete VCB panel conforming to IEC 62271-200 standards and IP 4X class of protection comprising of necessary busbar extensions and connections circuit breaker suitable for E2, M2, C2 duty vacuum interrupters of the circuit breakers completely encapsulated in epoxy housing switch gear and control gear panels of fully arc proof IAC AFLR for 26.3 KA for 1

sec with micro processor based numerical relay communicable type in line with RS 485 Modbus protocol, comprising of three over current, one earth fault protection relay with high set for both phase and earth and with fault memory, universal aux supply, master trip relay, trip circuit supervision relay. Digital multi functional meter with class 1.0, PT 11 kv/110 AC, Power pack 11 KV, 230 V AC complete all as specified and directed. 11 KV 630 Amps, 25 KA for 3 sec STC VCB INCOMER PANEL-01 No. consisting of: (a) 630 Amps continous high conductivity electrolytic copper busbar, raychem insulated for full voltage, phase identification made at the end by coloured tape, busbar shall be mounted on integral seal of bushing and interconnection with electrolytic grade copper with joints silver painted.

(g) Multi-function meter, digital type (displaying A, V, PF, HZ, KVA, KW, KVAR, KWH, KVARH etc) class 0.5 with RS 485 port. Make: L&T, Conserve, Schneider. (h) High speed master trip relay - 01 No equivalent in ABB / SIEMENS / SCHNEIDER / GE. (j) Trip circuit supervision relay - 01 No equivalent in ABB / SIEMENS / SCHNEIDER / GE. (k) PT fuse failure relay - 01 No. ABB / SIEMENS / Schneider. (l) Air insulated rear bottom entry cable box suitable for termination of HT XLPE 11 KV cables. (m) Anti pumping relay (VAA 11) - 01 No. Make: Siemens / ABB / SCHNEIDER / GE. (n) Power pack-01 No.

(o) Feeder protection relay with phase over current (50/51), directional phase over current (67), SOFT switch on to fault (50 HS), Current unbalance (46), thermal overload (49), earth fault (50N/51N), Directional earth fault (67N), under voltage (27), over voltage (59), zero sequence voltage protection (59N), frequency (81), auto reclose (79), Circuit breaker failure (50BF), cold load pick-up and magnetising in rush, programmable stages (99), CB wear. Relay shall have 4CT and 4VT inputs. Relay shall be provided with atleast 16 digital inputs and 8 digital outputs and 1 self supervision output. Relay shall have also these features inbuilt. MIMIC display with single line

representation and switch gear controls shall be possible through the MIMIC front USB for connecting to PC, conformal coating to withstand harsh environment, support PRP redudancy communication protocol on FO ports. Web server (web HMI) feature to monitor and control using LAN shall have minium 1000 events. Relay shall support SNTP time synchronization & support customer defined programmable logic with minium 8 programmable LED. Relay shall have disturbance recorder with settable sample rate from 8 cycle to 32 cycle or MICOM P3U30 or equivalent in makes: ABB / CG / Siemens.

(p) Panel shall also have additional features like continous rated closing / tripping coils, spring charging handle, manual closing / tripping off the VCB with compartment door closed, short time rating 01 sec as per IEC 62271-200 and VCB shall be suitable for E2, M2, C2 Class. (q) Breaker shall also be provided with Aux switch 6NO + 6NC contacts mounted on the draw out portion of the switch gear and position cell switch with 3 NO + 1 NC contact each for test position.

(r) IAC AFLR 26.3 KA for 1 Sec. 11 KV, 630 Amps, 25 KA/3 Sec STC VCB outgoing panel - 03 Nos each panel shall be consisting of: (a) 630 Amps continous high conductivity electrolytic copper busbar, raychem insulated for full voltage, phase identification made at the end by coloured tape, busbar shall be mounted on integral seal of bushing and interconnection with electrolytic grade copper with joints silver painted. (b) Circuit breaker shall be mounted on with drawable truck which shall roll out horizontally from service position to isolated position with ease. (c) Motorised spring charged mechanism 230 V AC.

(j) Trip circuit supervision relay - 01 No equivalent in ABB / SIEMENS / SCHNEIDER / GE. (k) Air insulated rear bottom entry cable box suitable for termination of HT XLPE 11 KV cables. (l) Anti pumping relay (VAA 11) - 01 No. Make: Siemens / ABB / SCHNEIDER / GE. (m) Power pack - 01 No. (n) Feeder protection relay with phase over current (50/51), directional phase over current (67), SOFT switch on to fault (50 HS), Current unbalance (46), thermal overload (49), earth fault (50N/51N), Directional earth fault (67N), under voltage (27), over voltage (59), zero sequence voltage protection (59N), frequency (81), auto reclose (79), Circuit breaker failure (50BF), cold load pick-up and magnetising inrush, programmable stages (99), CB wear. Relay shall have 4CT & 4VT inputs.

Relay shall be provided with atleast 16 digital inputs and 8 digital outputs and 1 self supervision output. Relay shall have also these features inbuilt. MIMIC display with single line represntation and switch gear controls shall be possible through the MIMIC front USB for connecting to PC, conformal coating to withstand harsh environment, support PRP redudancy communication protocol on FO ports. Web server (web HMI) feature to monitor and control using LAN shall have minimum 1000 events. Relay shall support SNTP time synchronization & support customer defined programmable logic with minium 8 programmable LED. Relay shall have disturbance recorder with settable sample rate from 8 cycle to 32 cycle or MICOM P3U30 or equivalent in makes: ABB / CG / Siemens.

(o) Panel shall also have additional features like continous rated closing / tripping coils, spring charging handle, manual closing / tripping off the VCB with compartment door closed, short time rating 01 sec as per IEC 62271-200 and VCB shall be suitable for E2, M2, C2 Class. (p) Breaker shall also be provided with Aux switch 6NO + 6NC contacts mounted on the draw out portion of the switch gear and position cell switch with 3 NO + 1 NC contact each for test position. (q) IAC AFLR 26.3 KA for 1 Sec. (r) Painting: Two coats of synthetic zinc paint over a coat of zinc oxide primer. (s) Factory inspection shall be carried out in the presence of representative nominated by Accepting Officer for VCB before despatch.

BHARAT ELECTRICAL TRADERS (BID ID -3472139)

GEPS PROJECTS (BID ID -3471683)

United Sales Corporation (BID ID -3470044)

SHRI GANESH ENTERPRISES (BID ID -3471757)

SAGGI ELECTRIC COMPANY (BID ID -3467775)

R D Bansal (BID ID -3471898)

Leo Air and Power Solution pvt Ltd. (BID ID -3471619)

Prasur Electricals & Engineering Co. (BID ID -3472122)

Power Dynamics (BID ID -3471325)

rvelectricals (BID ID -3471900)

Vikram Engineering Company (BID ID -3471684)

A CHINNARAO REDDY (BID ID -3472020)

B DURGA REDDY INFRASTRUCTURES PRIVATE LIMITED (BID ID -3471934)

M/S. KASHI KANCHAN PVT. LTD. (BID ID -3471744)

RVR PROJECTS PRIVATE LIMITED (BID ID -3470854)