SUPPLY OF CAST RESIN TRANSFORMERS 11/0.433 KV, 1000 ...

SUPPLY OF CAST RESIN TRANSFORMERS

11/0.433 KV, 1000 kVA – 2 Nos

A. General

1. The offered Transformer Make shall be VoltAmp/Voltas/BHEL /PS Electric only 2. Manufacturer or their Authorised dealer offer only will be considered. Dealers certificate and

supply list of similar transformer to be furnished

B. The Offer shall be submitted in TWO PARTS.

i. Techno-Commercial. The Techno-Commercial offer shall contain the technical compliance statement in same format and order. Necessary technical Catalogues supporting the product to be enclosed.

II. Financial: The cost of the item in the financial bid shall be stated as below. a. Transformer with standard accessories and Optional Fittings b. Customer Routine Inspection charges if any c. Charges for Heat run test d. Charges for impulse test (optional). e. Any other please specify clearly.

C. Clause by Clause technical Specification compliance for our specification should be furnished (compliance shall be furnished for all the information given in page 1 to 6 as per given format)

I. Deviations if any shall be highlighted in the offer.

II. Detail GA diagram should be submitted along with the offer

III. Better features other than specified shall be highlighted

IV. Transformer will be inspected and Tested before dispatch, Type test and Impulse test report of similar Transformer to be enclosed

V. Spares and optional items shall be indicated with price.

D. Documentation:

Two sets of Operation, Maintenance and Service manuals.

Two sets of Test reports with GA, Control circuit Drawings

E. Warranty:

System supplied shall be covered under a warranty period of 18 months from the date of receipt of the material at our Stores or 12 months from the date of commissioning of the unit at site.

F. Bank Guarantee: Bank guarantee shall be given as per Department norms

G. Validity of the offer should not be less than 120 days from the tender due date

H. The item shall be delivered at ISRO, MCF - Hassan

SUPPLY OF CAST RESIN TRANSFORMERS

11/0.433 kV, 1000 kVA – 2 Nos

TECHNICAL SPECIFICATIONS

The design, manufacturing and performance of equipment shall comply with all

currently applicable standards, regulations and safety codes

Sl

No. Specification

1. Scope Supply of Cast resin (Dry) type outdoor

TRANSFORMER

2. Quantity 2 Nos.

3. Make: VoltAmp/Voltas/BHEL/PS Electric

4. Standards

(with latest amendments)

IS 11171

IS 2026

IEC 60726

5. System of supply 11 kV, 3 phase, 50 cycles solidly earthed

system

6. Service Continuous duty, OUT DOOR

7. KVA Rating (kVA)

a) HV winding

b) LV winding

1000 kVA

8. Rated Voltage (kV)

a) HV winding

b) LV winding

11 kV

433 Volts

9. Rated Frequency (Hz) 50 Hz

10. Number of phases 3

11. Connections

a) HV winding

b) LV winding

* Separate neutral bushing to be

provided externally apart from the

neutral provided in LV terminal box

Delta

Star

* required for neutral earthing

12. Connection symbol

a) HV –LV / IS

Dyn 11 / IS 2026/77

13. Winding Copper winding – double wound core

Cast resin type

14. Core CRGO or better version

15. Tappings

1. Range

2. No. of steps

3. For high voltage variation/for low

voltage variation

+7.5% to -7.5% in steps of 2.5%

off circuit tap changing links at HV side

The links and terminals shall be suitably

insulated / covered for accidental short

circuit

16. Reference ambient temperature (0C)

a) Max. ambient air temp.

b) Min ambient temp.

50 0C

- 5 0C

17. Type of cooling AN

18. Temperature raise (0C)

Of winding above ambient

90 0C above ambient of 50 0C

19. Insulation class Class F (90 0C temp rise)

20. Enclosure IP 44 or better for outdoor application

21. Total loss at rated voltage at principal

tapping and rated frequency (kW)

Less than 11.5 kW

22. Component losses (kW)

a) No load loss at rated voltage on

principal tapping and at rated freq

b) Load loss at rated current at

principal tapping at 75 0C

2.5 kW (Max)

9.0 kW (Max)

23. Impedance voltage at rated current

for the principal tapping (%)

a) HV-LV

5.00 %

24. Reactance at rated current & freq.(%)

a) HV-LV

4.92

25. No load current at rated voltage and

rated frequency (%)

< 2%

26. Input to cooling plant (kW) Nil

27. Insulation level (kV rms)

a) Separate source power frequency

voltage with stand

i) HV winding

ii) LV winding

b) Induced over voltage with stand

i) HV winding

iii) LV winding

c) Full wave lightning Impulse

withstand voltage (kV peak)

i) HV winding

ii) LV winding

d) Switching Impulse withstand

voltage (kV peak)

i) HV winding

ii) LV winding

As per IS

28 kV

3kV

As per IS

866 V

As per IS

As per IS

28. Efficiencies at 75 0C at UPF (%)

a) AT Full load

b) At 3/4 Full load

c) At ½ Full load

Better than 98.86 %

Better than 99 %

Better than 99.06 %

29. Over Load Capacity As per IS 6600

30. Regulation at Full load at 75 0C (%)

a) At UPF

b) At 0.8 PF lag

less than

1.02 %

3.73 %

31. OFF circuit voltage variation by

OFF circuit link /details 2.5%

32. Terminal arrangement

a) HV

b) LV

c) Neutral

Out door cable box for 3C, 150 mm2

XLPE Cable termination with cable

disconnecting chamber

Out door cable box for 6 runs of 4C, 300

mm2 PVC Cable termination with cable

disconnecting chamber. Terminal brass

palm connector as per IS and Copper Bus

bar for each phase cable terminations in

side disconnecting chamber

Separate external bushing with brass

palm connector for earthing

Note: Cable termination height shall suit

to present cables at site. Details will be

furnished during GA approval

33. Approximate masses (Kg)

a) Core and winding

b) Enclosure, fittings and

accessories

c) Total mass

34. Approx. Overall Dimensions (mm)

a) Length

b) Breadth

c) Height

35. Despatch Details

a) Approx. Mass of heaviest

package (kg)

b) Approx. Dimension of largest

pack (mm)

36. Un-tanking provision Enclosure mounted

37. Reference standards IS 11171

FITTINGS

Sl

No.

Description

Specification

1. RTDs on LV winding 3 Nos

2. Digital Temperature scanner with RS

232 / 485 serial interface facility

1 No.

3. Protection against over load through

RTD with alarm and trip contacts

Required

4. Safety door interlocking limit switches

duly wired up to TB

Industrial type switches required

(Make: Keycee / BCH)

5. Inspection / view window ( tough

glass)

Required

6. Rating plate Required

7. Terminal marking plate Required

8. Two Earthing pad & terminal Required

9. Lifting lugs Required

10. Plain bi-directional Rollers Detachable

type

Mounted on C channels

Required

11. Skids Required

12. Cable box

LV: 4 pole bus duct adopter box Required

13. HT Cable box for XLPE cable

termination Required

14. LV terminal connector (brass type as

per IS) with bi-metal shim for busbar 5 Nos. Required

15. Jacking pads Required

16. Enclosure The structure material used for the enclosure shall be of high

quality MS. Main frame shall be of suitable equal angles /

channels. Sheet covers used shall be not less than 1.8 mm

thickness. Additional stiffener to be provided for doors. The

enclosure shall provide not less than IP 44 protections for

outdoor use. Separate detachable rain protection hood of slope

type in addition to top cover shall be provided. Suitable

toughen glass View window to be provided wherever required.

All doors / covers shall be fixed with high quality gaskets to

with stand the rated temperature. Each door shall have

Interlock for tripping HT CB. Sufficient bottom clearance for

cooling to be incorporated

The enclosure shall be housed on MS C Channel, which will

be used for resting on installation platform at site. The system

shall have heavy-duty detachable rollers.

17. Control wiring Through 1.1KV grade, FINOLEX / RR make flame proof

Copper stranded pre twisted conductor of 2.5 mm2 shall be

used for control circuits. All auxiliary contact terminals to be

extended up to a poly propylene / wago type common terminal

block for remote monitoring purposes

18. Painting Epoxy Siemens Grey (RAL 7032)

19. GA Drawing To be furnished for approval

20. Control drawing To be furnished for approval

INSPECTION AND TESTING

Inspected before despatch

Sl

No.

Description

Specification

1. ROUTINE TEST

a) Measurement of winding resistance

b) Measurement of voltage ratio and

check of voltage vector relation ship

c) Measurement of impedance voltage /

short circuit impedance and load loss

d) Measurement of no load loss and

current

e) Measurement of insulation resistance

f) Dielectric tests

To be witnessed by our Engineers

at factory

2. TYPE TEST







current


f) Dielectric tests

g) Temperature raise

To be WITNESSED by our

Engineers at factory

3. SPECIAL TESTS (OPTIONAL )

Impulse voltage withstand test as per IS

If Similar transformer has under gone this

test enclose the test reports

To be WITNESSED by our

Engineers (OPTIONAL) at

Approved HV Lab / CPRI

OTHER

1. Any other better

features

2. Deviations if any

3. Payment terms Within 30 days of receipt and acceptance

4. Warrantee 18 Months from the date of supply OR 12 months from the

date of Commissioning

5. Bank Gaurantee Performance of Bank guarantee as per dept. terms to be

furnished

6. Delivery FOR Hassan

7. Validity 120 days

TECHNICAL BID GENERAL TERMS COMPLIANCE FORMAT

Sl No. Description Specification Compliance

A.

1.

General

Make

Supply of VoltAmp / Voltas / BHEL

/ PS Electric make Cast Resin

Transformer

Offered make to be mentioned

2 a) Supplier details Manufacturer / Authorised Dealer

b) If Authoriesd Dealer, Valid

Certificate to be enclosed

c) List of similar items supplied to be

enclosed

d) Company profiles to be enclosed

e) GA drawing and OEM catalogues

should be submitted. The

Engineering Drawing should

contain Structural Details with

dimensions

f) Type test / Impulse test reports of

similar Transformer to be enclosed

B a) Technical bid

compliance

Techno commercial terms to be

enclosed

b) Price bid

compliance

Price offer compliance for

a)Transformer with standard

accessories b) spares and Optional

Fittings, c) Customer Inspection –

routine, Heat run and Impulse with

stand test as per Inspection at Works

clause

DO NOT indicate

price here

c) Any other please specify clearly.

C a) Clause by

Clause

compliance

Clause by clause Technical

specification compliance along with

the Bill of Material

b) Any other better features

c) Deviation if any

D a) Documentation Two sets of Operation, Maintenance

and Service manuals.

Two sets of Test reports with GA,

Control circuit Drawings

b) Minor

modifications

Any minor modifications/deviations

in Electrical or Mechanical, pointed

out by our Engineer during

Inspection has to be carried out

without any additional cost

implications

c) Test equipment

Calibration

reports

Calibration reports of testing

equipments and test certificates of

accessories to be supplied by you, to

be submitted to our inspecting

engineer during inspection

E Warrantee The equipment shall carry the

warrantee against faulty materials,

design or workmanship for a period

not less than 18 months from the

date of receipt of material at our

stores OR 12 months from the date

of Commissioning whichever is

earlier

F Performance

Bank Guarantee

Performance Bank Guarantee shall

be provided as per department terms

G Validity Offer validity should not be less

than 120 days from the tender due

date

H Delivery FOR MCF - Hassan

TECHNICAL SPECIFICATIONS COMPLIANCE FORMAT

The design, manufacturing and performance of equipment shall comply with all

currently applicable standards, regulations and safety codes

Sl

No. Description Specification Compliance

1. Scope Supply of Cast resin (Dry)

type outdoor

TRANSFORMER

2. Quantity 2 Nos.

3. Make: VoltAmp/Voltas/BHEL/PS

Electric

4. Standards

(with latest amendments)

IS 11171

IS 2026 , IEC 60726

5. System of supply 11 kV, 3 phase, 50 cycles

solidly earthed system

6. Service Continuous duty, OUT

DOOR

7. KVA Rating (kVA)

a) HV winding

b) LV winding

1000 kVA

8. Rated Voltage (kV)

a) HV winding

b) LV winding

11 kV

433 Volts

9. Rated Frequency (Hz) 50 Hz

10. Number of phases 3

11. Connections

a) HV winding

b) LV winding

* Separate neutral bushing

to be provided externally

apart from the neutral

provided in LV terminal

box

Delta

Star

* required for neutral

earthing

12. Connection symbol

a) HV –LV / IS Dyn 11 / IS 2026/77

13. Winding Copper winding – double

wound core Cast resin type

14. Core CRGO or better version

15. Tappings

4. Range

5. No. of steps

6. For high voltage

variation/for low

voltage variation

+7.5% to -7.5% in steps of

2.5% off circuit tap changing

links at HV side

The links and terminals shall

be suitably insulated /

covered for accidental short

circuit

16. Reference ambient

temperature (0C)

c) Max. ambient air temp.

d) Min ambient temp.

50 0C

- 5 0C

17. Type of cooling AN

18. Temperature raise (0C)

Of winding above ambient

90 0C above ambient of 50 0C

19. Insulation class Class F (90 0C temp rise)

20. Enclosure IP 44 or better for outdoor

application

21. Total loss at rated voltage

at principal tapping and

rated frequency (kW)

Less than 11.5 kW

22. Component losses (kW)

c) No load loss at rated

voltage on principal

tapping and at rated

freq

d) Load loss at rated

current at principal

tapping at 75 0C

2.5 kW (Max)

9.0 kW (Max)

23. Impedance voltage at rated

current for the principal

tapping (%)

a) HV-LV

5.00 %

24. Reactance at rated current

& freq.(%)

a) HV-LV

4.92

25. No load current at rated

voltage and rated

frequency (%)

< 2%

26. Input to cooling plant

(kW)

Nil

27. Insulation level (kV rms)

e) Separate source power

frequency voltage with

stand

iv) HV winding

v) LV winding

f) Induced over voltage

with stand

j) HV winding

vi) LV winding

g) Full wave lightning

Impulse withstand

voltage (kV peak)

iii) HV winding

iv) LV winding

h) Switching Impulse

withstand voltage (kV

peak)

j) HV winding

iii) LV winding

As per IS

28 kV

3kV

As per IS

866 V

As per IS

As per IS

28. Efficiencies at 75 0C at

UPF (%)

d) AT Full load

e) At 3/4 Full load

f) At ½ Full load

Better than 98.86 % Better

than 99 %

Better than 99.06 %

29. Over Load Capacity As per IS 6600

30. Regulation at Full load at

75 0C (%)

c) At UPF

d) At 0.8 PF lag

less than

1.02 %

3.73 %

31. OFF circuit voltage

variation by

OFF circuit link /details

2.5%

32. Terminal

arrangement

d) HV

e) LV

f) Neutral

Out door cable box for 3C, 150 mm2

XLPE Cable termination with cable

disconnecting chamber

Out door cable box for 6 runs of 4C, 300

mm2 PVC Cable termination with cable

disconnecting chamber. Terminal brass

palm connector as per IS and Copper

Bus bar for each phase cable

terminations in side disconnecting

chamber Separate external bushing with

brass palm connector for earthing

Note: Cable termination height shall suit

to present cables at site. Details will be

furnished during GA approval

33. Approximate masses (Kg)

d) Core and winding

e) Enclosure, fittings and

accessories

f) Total mass

34. Approx. Overall

Dimensions (mm)

d) Length

e) Breadth

f) Height

35. Despatch Details

c) Approx. Mass of

heaviest package (kg)

d) Approx. Dimension of

largest pack (mm)

36. Un-tanking provision Enclosure mounted

37. Reference standards IS 11171

FITTINGS

Sl Description/ Specification

38. RTDs on LV winding 3 Nos

39. Digital Temperature scanner with RS

232 / 485 serial interface facility

1 No.

40. Protection against over load through

RTD with alarm and trip contacts

Required

41. Safety door interlocking limit switches

duly wired up to TB

Industrial type

switches required

(Make: Keycee /

BCH)

42. Inspection / view window ( tough

glass)

Required

43. Rating plate Required

44. Terminal marking plate Required

45. Two Earthing pad & terminal Required

46. Lifting lugs Required

47. Plain bi-directional Rollers Detachable

type, Mounted on C channels

Required

48. Skids Required

49. Cable box

LV: 4 pole bus duct adopter box Required

50. HT Cable box for XLPE cable

termination Required

51. LV terminal connector (brass type as

per IS) with bi-metal shim for busbar 5 Nos. Required

52. Jacking pads Required

53. Enclosure The structure material used for the

enclosure shall be of high quality MS.

Main frame shall be of suitable equal

angles / channels. Sheet covers used

shall be not less than 1.8 mm thickness.

Additional stiffener to be provided for

doors. The enclosure shall provide not

less than IP 44 protections for outdoor

use. Separate detachable rain protection

hood of slope type in addition to top

cover shall be provided. Suitable

toughen glass View window to be

provided wherever required. All doors /

covers shall be fixed with high quality

gaskets to with stand the rated

temperature. Each door shall have

Interlock for tripping HT CB. Sufficient

bottom clearance for cooling to be

incorporated The enclosure shall be

housed on MS C Channel, which will be

used for resting on installation platform

at site. The system shall have heavy-

duty detachable rollers.

54. Control wiring Through 1.1KV grade, FINOLEX / RR

make flame proof Copper stranded pre

twisted conductor of 2.5 mm2 shall be

used for control circuits. All auxiliary

contact terminals to be extended up to a

poly propylene / wago type common

terminal block for remote monitoring

purposes

55. Painting Epoxy Siemens Grey (RAL 7032)

56. GA Drawing To be furnished for approval

57. Control drawing To be furnished for approval

INSPECTION AND TESTING

Inspected before dispatch at works

Sl

No.

Description

Specification

58. ROUTINE TEST







current


f) Dielectric tests

To be witnessed

by our

Engineers at

factory

59. TYPE TEST







current


f) Dielectric tests

g) Temperature raise (Heat run)

To be

WITNESSED

by our

Engineers at

factory

60. SPECIAL TESTS (OPTIONAL)

Impulse voltage withstand test as per IS,

Furnish the report If similar transformer

has under gone this test

To be

WITNESSED

by our

Engineers

(OPTIONAL)

at Approved

HV Lab / CPRI

SUPPLY OF CAST RESIN TRANSFORMERS 11/0.433 KV, 1000 ...

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