Tender For Transformer Package Tato-I Hydro Electric Project (186 Mw),Arunachal Pradesh., Shillong-Meghalaya

TDR : 54387663

Tender Notice
BOQ

25 Days Left

Shillong , Meghalaya

Tender Brief : Tender For Transformer Package Tato-I Hydro Electric Project (186 Mw),Arunachal Pradesh.

Document Fees
₹ 11800 /-

EMD
₹ 10700000.0 /-

Tender Value
₹ 53.64 Crore /-

Submission Date
31-03-2026

Competition Type
Indian

Bidding Type
Works

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1	Total from Price Schedule II (Supply)
2	Total from Price Schedule III (F&I)
3	Total from Price Schedule IV (E&C)
4	GENERATOR TRANSFORMERS
5	Generator Transformer :11kV/220/√3kV, 27 MVA, 1 Ph, 50Hz, Z=12.5%, off circuit tap changer, Vector group YNd11, OFWF step-up transformer suitable for 3 Ph bank connection in Delta/Star with neutral solidly grounded. Transformer shall be supplied complete with HV neutral bushing for connection to neutral bus, HV bushing suitable for oil to gas termination and LV bushings with flanges suitable for IPBD termination and external delta formation, 1No, 2 core, 17.5 kV, 400/1/1A CL PS Neutral (external zero sequence) CT per bank ,1 Nos. 3 core, 400/1/1/1A , CT mounted in HV bushing turret, first fill of oil + 10% extra oil complete with Air cell type conservator, Two automatic Pressure reducer (From 3 to 5 kg/cm2 to a constant 0.2 kg/sq.cm (a value less than oil pressure inside the tank)) for each Transformer bank. WTI, OTI, Optical sensor for temperature measuring, Buchholz relay, MOG, Breather, MB, oil pumps, oil to water coolers and associated instruments, valves, flanges etc. as per technical specification and as below :
6	First fill of oil for all equipment supplied, with 10% extra oil
7	The 11 kV interface flange with the 5000 A insulated phase duct.
8	The 220 kV SF6 Insulated transformer termination for connection to 220 kV GIS tube including the coordination, supervision and approval of the termination connection.
9	The insulated neutral bus and zero sequence external CT (two cores required) including insulators and supports.
10	The current transformer, protection and control cables, and connections between the transformer control cabinets, marshalling kiosks and the marshalling box & RTU Cubicle.
11	Marshalling box per transformer bank complete with disconnect type terminals for voltage circuits and short-circuiting type terminals for current circuits and all the necessary incoming and outgoing terminal blocks including all inter-connecting cables.
12	Marshalling kiosks per transformer complete with disconnect type terminals for voltage circuits and short-circuiting type terminals for current circuits and all the necessary incoming and outgoing terminal blocks including all inter-connecting cables.
13	The water connection to the isolation valves provided within the transformer enclosure including flexible and supports.
14	The 415/240 V AC cables and connections between the main and standby oil pump control panels and the common marshalling box.
15	The 415/240 V AC disconnect switches (2 per Bank of transformers.
16	RTU Panel (TRB)
17	Mandatory Spares as per Technical Specification.
18	DISTRIBUTION TRANSFORMERS
19	Station-Service Transformer (SST) :Station Service Transformer: 5000 kVA, 220 kV / 33 kV, 3 phase, 50 Hz, YNyn0, Step-down, Oil Type, Indoor transformer with Off-Circuit Tap Changer and suitable for cable connection for LV.
20	Station Auxiliary Transformer (SAT):Station Auxiliary Transformer: 1500 kVA, 33/0.433 kV, 3 phase, 50 Hz, Dyn11, Dry Type, Indoor transformer with Off-Circuit Tap Changer and suitable for cable connection.
21	Unit Auxiliary Transformer (UAT):Unit Auxiliary Transformer: 630 kVA, 11 kV / 0.433 kV, 3 phase, 50 Hz, Dyn11, Step-down, Dry Type, Indoor transformer with Off-Circuit Tap Changer and suitable for cable connection for LV.
22	HRT INTAKE AUXILIARY TRANSFORMER :HRT Intake Auxiliary Transformer: 160 kVA, 33 kV / 0.433 kV, 3 phase, 50 Hz, Dyn11, Step-down, Oil Type, transformer with Off-Circuit Tap Changer
23	VALVE HOUSE AUXILIARY TRANSFORMER:Valve House Auxiliary Transformer: 160 kVA, 33 kV / 0.433 kV, 3 phase, 50 Hz, Dyn11, Step-down, Oil Type, transformer with Off-Circuit Tap Changer
24	Mandatory Spares as per Technical Specification.
25	Earthing Material of equipment for connection from over ground riser.
26	Transformer Oil Filtration system
27	6000 LPH Transformer Oil Filtration System including 25KL storage tank as per specification.
28	GENERATOR TRANSFORMERS
29	Generator Transformer :Generator Transformer :11kV/220/√3kV, 27 MVA, 1 Ph, 50Hz, Z=12.5%, off circuit tap changer, Vector group YNd11, OFWF step-up transformer suitable for 3 Ph bank connection in Delta/Star with neutral solidly grounded. Transformer shall be supplied complete with HV neutral bushing for connection to neutral bus, HV bushing suitable for oil to gas termination and LV bushings with flanges suitable for IPBD termination and external delta formation, 1No, 2 core, 17.5 kV, 400/1/1A CL PS Neutral (external zero sequence) CT per bank ,1 Nos. 3 core, 400/1/1/1A , CT mounted in HV bushing turret, first fill of oil + 10% extra oil complete with Air cell type conservator, Two automatic Pressure reducer (From 3 to 5 kg/cm2 to a constant 0.2 kg/sq.cm (a value less than oil pressure inside the tank)) for each Transformer bank. WTI, OTI, Optical sensor for temperature measuring, Buchholz relay, MOG, Breather, MB, oil pumps, oil to water coolers and associated instruments, valves, flanges etc. as per technical specification and as below :
30	First fill of oil for all equipment supplied, with 10% extra oil
31	The 11 kV interface flange with the 5000 A insulated phase duct.
32	The 220 kV SF6 Insulated transformer termination for connection to 220 kV GIS tube including the coordination, supervision and approval of the termination connection.
33	The insulated neutral bus and zero sequence external CT (two cores required) including insulators and supports.
34	The current transformer, protection and control cables, and connections between the transformer control cabinets, marshalling kiosks and the marshalling box & RTU Cubicle.
35	Marshalling box per transformer bank complete with disconnect type terminals for voltage circuits and short-circuiting type terminals for current circuits and all the necessary incoming and outgoing terminal blocks including all inter-connecting cables.
36	Marshalling kiosks per transformer complete with disconnect type terminals for voltage circuits and short-circuiting type terminals for current circuits and all the necessary incoming and outgoing terminal blocks including all inter-connecting cables.
37	The water connection to the isolation valves provided within the transformer enclosure including flexible and supports.
38	The 415/240 V AC cables and connections between the main and standby oil pump control panels and the common marshalling box.
39	The 415/240 V AC disconnect switches (2 per Bank of transformers.
40	RTU Panel (TRB)
41	Mandatory Spares as per Technical Specification.
42	DISTRIBUTION TRANSFORMERS
43	Station-Service Transformer (SST) :Station Service Transformer: 5000 kVA, 220 kV / 33 kV, 3 phase, 50 Hz, YNyn0, Step-down, Oil Type, Indoor transformer with Off-Circuit Tap Changer and suitable for cable connection for LV.
44	Station Auxiliary Transformer (SAT):Station Auxiliary Transformer: 1500 kVA, 33/0.433 kV, 3 phase, 50 Hz, Dyn11, Dry Type, Indoor transformer with Off-Circuit Tap Changer and suitable for cable connection.
45	Unit Auxiliary Transformer (UAT):Unit Auxiliary Transformer: 630 kVA, 11 kV / 0.433 kV, 3 phase, 50 Hz, Dyn11, Step-down, Dry Type, Indoor transformer with Off-Circuit Tap Changer and suitable for cable connection for LV.
46	HRT INTAKE AUXILIARY TRANSFORMER :HRT Intake Auxiliary Transformer: 160 kVA, 33 kV / 0.433 kV, 3 phase, 50 Hz, Dyn11, Step-down, Oil Type, transformer with Off-Circuit Tap Changer
47	VALVE HOUSE AUXILIARY TRANSFORMER:Valve House Auxiliary Transformer: 160 kVA, 33 kV / 0.433 kV, 3 phase, 50 Hz, Dyn11, Step-down, Oil Type, transformer with Off-Circuit Tap Changer
48	Mandatory Spares as per Technical Specification.
49	Earthing Material of equipment for connection from over ground riser.
50	Transformer Oil Filtration system
51	6000 LPH Transformer Oil Filtration System including 25KL storage tank as per specification.
52	GENERATOR TRANSFORMERS
53	Generator Transformer :11kV/220/√3kV, 27 MVA, 1 Ph, 50Hz, Z=12.5%, off circuit tap changer, Vector group YNd11, OFWF step-up transformer suitable for 3 Ph bank connection in Delta/Star with neutral solidly grounded with all the associated accessories as detailed in the Technical specifications.:
54	DISTRIBUTION TRANSFORMERS
55	Station-Service Transformer (SST) :Station Service Transformer: 5000 kVA, 220 kV / 33 kV, 3 phase, 50 Hz, YNyn0, Step-down, Oil Type, Indoor transformer with Off-Circuit Tap Changer and suitable for cable connection for LV.
56	Station Auxiliary Transformer (SAT):Station Auxiliary Transformer: 1500 kVA, 33/0.433 kV, 3 phase, 50 Hz, Dyn11, Dry Type, Indoor transformer with Off-Circuit Tap Changer and suitable for cable connection.
57	Unit Auxiliary Transformer (UAT):Unit Auxiliary Transformer: 630 kVA, 11 kV / 0.433 kV, 3 phase, 50 Hz, Dyn11, Step-down, Dry Type, Indoor transformer with Off-Circuit Tap Changer and suitable for cable connection for LV.
58	HRT INTAKE AUXILIARY TRANSFORMER :HRT Intake Auxiliary Transformer: 160 kVA, 33 kV / 0.433 kV, 3 phase, 50 Hz, Dyn11, Step-down, Oil Type, transformer with Off-Circuit Tap Changer
59	VALVE HOUSE AUXILIARY TRANSFORMER:Valve House Auxiliary Transformer: 160 kVA, 33 kV / 0.433 kV, 3 phase, 50 Hz, Dyn11, Step-down, Oil Type, transformer with Off-Circuit Tap Changer
60	Earthing Material of equipment for connection from over ground riser.
61	Continuous Online Monitoring and Analyzing System for a minimum of 3 fault gasses as given in specification as OPTIONAL for Generator Transformers. Notes: 1. The Above PRICE SCHEDULE V (Optional Item) will not be considered for evaluation of L1 price. 2. The above price schedule shall also be submitted along with Techno-Commercial offer without indicating the prices. Please Enable Macros to View BoQ information

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Tender For Transformer Package Tato-I Hydro Electric Project (186 Mw),Arunachal Pradesh., Shillong-Meghalaya

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Sl. No.	Item Description
1	Total from Price Schedule II (Supply)
2	Total from Price Schedule III (F&I)
3	Total from Price Schedule IV (E&C)
4	GENERATOR TRANSFORMERS
5	Generator Transformer :11kV/220/√3kV, 27 MVA, 1 Ph, 50Hz, Z=12.5%, off circuit tap changer, Vector group YNd11, OFWF step-up transformer suitable for 3 Ph bank connection in Delta/Star with neutral solidly grounded. Transformer shall be supplied complete with HV neutral bushing for connection to neutral bus, HV bushing suitable for oil to gas termination and LV bushings with flanges suitable for IPBD termination and external delta formation, 1No, 2 core, 17.5 kV, 400/1/1A CL PS Neutral (external zero sequence) CT per bank ,1 Nos. 3 core, 400/1/1/1A , CT mounted in HV bushing turret, first fill of oil + 10% extra oil complete with Air cell type conservator, Two automatic Pressure reducer (From 3 to 5 kg/cm2 to a constant 0.2 kg/sq.cm (a value less than oil pressure inside the tank)) for each Transformer bank. WTI, OTI, Optical sensor for temperature measuring, Buchholz relay, MOG, Breather, MB, oil pumps, oil to water coolers and associated instruments, valves, flanges etc. as per technical specification and as below :
6	First fill of oil for all equipment supplied, with 10% extra oil
7	The 11 kV interface flange with the 5000 A insulated phase duct.
8	The 220 kV SF6 Insulated transformer termination for connection to 220 kV GIS tube including the coordination, supervision and approval of the termination connection.
9	The insulated neutral bus and zero sequence external CT (two cores required) including insulators and supports.
10	The current transformer, protection and control cables, and connections between the transformer control cabinets, marshalling kiosks and the marshalling box & RTU Cubicle.
11	Marshalling box per transformer bank complete with disconnect type terminals for voltage circuits and short-circuiting type terminals for current circuits and all the necessary incoming and outgoing terminal blocks including all inter-connecting cables.
12	Marshalling kiosks per transformer complete with disconnect type terminals for voltage circuits and short-circuiting type terminals for current circuits and all the necessary incoming and outgoing terminal blocks including all inter-connecting cables.
13	The water connection to the isolation valves provided within the transformer enclosure including flexible and supports.
14	The 415/240 V AC cables and connections between the main and standby oil pump control panels and the common marshalling box.
15	The 415/240 V AC disconnect switches (2 per Bank of transformers.
16	RTU Panel (TRB)
17	Mandatory Spares as per Technical Specification.
18	DISTRIBUTION TRANSFORMERS
19	Station-Service Transformer (SST) :Station Service Transformer: 5000 kVA, 220 kV / 33 kV, 3 phase, 50 Hz, YNyn0, Step-down, Oil Type, Indoor transformer with Off-Circuit Tap Changer and suitable for cable connection for LV.
20	Station Auxiliary Transformer (SAT):Station Auxiliary Transformer: 1500 kVA, 33/0.433 kV, 3 phase, 50 Hz, Dyn11, Dry Type, Indoor transformer with Off-Circuit Tap Changer and suitable for cable connection.
21	Unit Auxiliary Transformer (UAT):Unit Auxiliary Transformer: 630 kVA, 11 kV / 0.433 kV, 3 phase, 50 Hz, Dyn11, Step-down, Dry Type, Indoor transformer with Off-Circuit Tap Changer and suitable for cable connection for LV.
22	HRT INTAKE AUXILIARY TRANSFORMER :HRT Intake Auxiliary Transformer: 160 kVA, 33 kV / 0.433 kV, 3 phase, 50 Hz, Dyn11, Step-down, Oil Type, transformer with Off-Circuit Tap Changer
23	VALVE HOUSE AUXILIARY TRANSFORMER:Valve House Auxiliary Transformer: 160 kVA, 33 kV / 0.433 kV, 3 phase, 50 Hz, Dyn11, Step-down, Oil Type, transformer with Off-Circuit Tap Changer
24	Mandatory Spares as per Technical Specification.
25	Earthing Material of equipment for connection from over ground riser.
26	Transformer Oil Filtration system
27	6000 LPH Transformer Oil Filtration System including 25KL storage tank as per specification.
28	GENERATOR TRANSFORMERS
29	Generator Transformer :Generator Transformer :11kV/220/√3kV, 27 MVA, 1 Ph, 50Hz, Z=12.5%, off circuit tap changer, Vector group YNd11, OFWF step-up transformer suitable for 3 Ph bank connection in Delta/Star with neutral solidly grounded. Transformer shall be supplied complete with HV neutral bushing for connection to neutral bus, HV bushing suitable for oil to gas termination and LV bushings with flanges suitable for IPBD termination and external delta formation, 1No, 2 core, 17.5 kV, 400/1/1A CL PS Neutral (external zero sequence) CT per bank ,1 Nos. 3 core, 400/1/1/1A , CT mounted in HV bushing turret, first fill of oil + 10% extra oil complete with Air cell type conservator, Two automatic Pressure reducer (From 3 to 5 kg/cm2 to a constant 0.2 kg/sq.cm (a value less than oil pressure inside the tank)) for each Transformer bank. WTI, OTI, Optical sensor for temperature measuring, Buchholz relay, MOG, Breather, MB, oil pumps, oil to water coolers and associated instruments, valves, flanges etc. as per technical specification and as below :
30	First fill of oil for all equipment supplied, with 10% extra oil
31	The 11 kV interface flange with the 5000 A insulated phase duct.
32	The 220 kV SF6 Insulated transformer termination for connection to 220 kV GIS tube including the coordination, supervision and approval of the termination connection.
33	The insulated neutral bus and zero sequence external CT (two cores required) including insulators and supports.
34	The current transformer, protection and control cables, and connections between the transformer control cabinets, marshalling kiosks and the marshalling box & RTU Cubicle.
35	Marshalling box per transformer bank complete with disconnect type terminals for voltage circuits and short-circuiting type terminals for current circuits and all the necessary incoming and outgoing terminal blocks including all inter-connecting cables.
36	Marshalling kiosks per transformer complete with disconnect type terminals for voltage circuits and short-circuiting type terminals for current circuits and all the necessary incoming and outgoing terminal blocks including all inter-connecting cables.
37	The water connection to the isolation valves provided within the transformer enclosure including flexible and supports.
38	The 415/240 V AC cables and connections between the main and standby oil pump control panels and the common marshalling box.
39	The 415/240 V AC disconnect switches (2 per Bank of transformers.
40	RTU Panel (TRB)
41	Mandatory Spares as per Technical Specification.
42	DISTRIBUTION TRANSFORMERS
43	Station-Service Transformer (SST) :Station Service Transformer: 5000 kVA, 220 kV / 33 kV, 3 phase, 50 Hz, YNyn0, Step-down, Oil Type, Indoor transformer with Off-Circuit Tap Changer and suitable for cable connection for LV.
44	Station Auxiliary Transformer (SAT):Station Auxiliary Transformer: 1500 kVA, 33/0.433 kV, 3 phase, 50 Hz, Dyn11, Dry Type, Indoor transformer with Off-Circuit Tap Changer and suitable for cable connection.
45	Unit Auxiliary Transformer (UAT):Unit Auxiliary Transformer: 630 kVA, 11 kV / 0.433 kV, 3 phase, 50 Hz, Dyn11, Step-down, Dry Type, Indoor transformer with Off-Circuit Tap Changer and suitable for cable connection for LV.
46	HRT INTAKE AUXILIARY TRANSFORMER :HRT Intake Auxiliary Transformer: 160 kVA, 33 kV / 0.433 kV, 3 phase, 50 Hz, Dyn11, Step-down, Oil Type, transformer with Off-Circuit Tap Changer
47	VALVE HOUSE AUXILIARY TRANSFORMER:Valve House Auxiliary Transformer: 160 kVA, 33 kV / 0.433 kV, 3 phase, 50 Hz, Dyn11, Step-down, Oil Type, transformer with Off-Circuit Tap Changer
48	Mandatory Spares as per Technical Specification.
49	Earthing Material of equipment for connection from over ground riser.
50	Transformer Oil Filtration system
51	6000 LPH Transformer Oil Filtration System including 25KL storage tank as per specification.
52	GENERATOR TRANSFORMERS
53	Generator Transformer :11kV/220/√3kV, 27 MVA, 1 Ph, 50Hz, Z=12.5%, off circuit tap changer, Vector group YNd11, OFWF step-up transformer suitable for 3 Ph bank connection in Delta/Star with neutral solidly grounded with all the associated accessories as detailed in the Technical specifications.:
54	DISTRIBUTION TRANSFORMERS
55	Station-Service Transformer (SST) :Station Service Transformer: 5000 kVA, 220 kV / 33 kV, 3 phase, 50 Hz, YNyn0, Step-down, Oil Type, Indoor transformer with Off-Circuit Tap Changer and suitable for cable connection for LV.
56	Station Auxiliary Transformer (SAT):Station Auxiliary Transformer: 1500 kVA, 33/0.433 kV, 3 phase, 50 Hz, Dyn11, Dry Type, Indoor transformer with Off-Circuit Tap Changer and suitable for cable connection.
57	Unit Auxiliary Transformer (UAT):Unit Auxiliary Transformer: 630 kVA, 11 kV / 0.433 kV, 3 phase, 50 Hz, Dyn11, Step-down, Dry Type, Indoor transformer with Off-Circuit Tap Changer and suitable for cable connection for LV.
58	HRT INTAKE AUXILIARY TRANSFORMER :HRT Intake Auxiliary Transformer: 160 kVA, 33 kV / 0.433 kV, 3 phase, 50 Hz, Dyn11, Step-down, Oil Type, transformer with Off-Circuit Tap Changer
59	VALVE HOUSE AUXILIARY TRANSFORMER:Valve House Auxiliary Transformer: 160 kVA, 33 kV / 0.433 kV, 3 phase, 50 Hz, Dyn11, Step-down, Oil Type, transformer with Off-Circuit Tap Changer
60	Earthing Material of equipment for connection from over ground riser.
61	Continuous Online Monitoring and Analyzing System for a minimum of 3 fault gasses as given in specification as OPTIONAL for Generator Transformers. Notes: 1. The Above PRICE SCHEDULE V (Optional Item) will not be considered for evaluation of L1 price. 2. The above price schedule shall also be submitted along with Techno-Commercial offer without indicating the prices. Please Enable Macros to View BoQ information

Tender For Transformer Package Tato-I Hydro Electric Project (186 Mw),Arunachal Pradesh., Shillong-Meghalaya

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