Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Edition No.: 4
Issued date: June 2011
Page No. 1 of 85
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
SPECIFICATION
FOR
HERMETICALLY SEALED
DISTRIBUTION NETWORK POWER TRANSFORMERS
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Edition No.: 4
Issued date: June 2011
Page No. 2 of 85
SPECIFICATION
FOR
HERMETICALLY SEALED
DISTRIBUTION NETWORK POWER TRANSFORMERS
Written by:
B. Vainshtein
Checked by:
Y. Shachak
Approved by: N. Liberman
Z. Segev
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Edition No.: 4
Issued date: June 2011
Page No. 3 of 85
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Table of Contents:
Clause no.
Clause description
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Appendix "A"
Appendix "B"
Appendix "C"
General
Standards
Documents Required For The Proposal
Data and Technical Requirements
Criteria for final comparison of Bidders offers
Prototype
Tests
Quality Requirements
Summary of data
Conformity with proposal documents
Manufacturer Experience to the Purchaser’s satisfaction
Type and special tests declaration
Declaration regarding the guaranteed losses of the proposed
transformers
Know – How agreement to the Purchaser’s satisfaction
Specification no.50 dated 1/7/09 for mineral insulating oil supplied
with/within new electrical equipment
Declaration regarding fulfillment of requirements of SI 5484
Israeli Standard
Required schedule for prototype approval of hermetically sealed
distribution network power transformers
Quality Requirements (Specification Q – APP – 02, Rev.4)
Routine tests results on magnetic media in diskette form
Criteria for final comparison of bidders offers
Summary Of Prices
Appendix "D"
Appendix "E"
Appendix "F"
Appendix "G"
Appendix "H"
Appendix "I"
Appendix "J"
Appendix "K"
Page
No.
5
5
5
7
34
34
37
39
40
46
47
49
51
53
55
63
65
67
75
83
85
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Edition No.: 4
Issued date: June 2011
Page No. 4 of 85
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
SPECIFIC PROPOSAL SUBMISSION INSTRUCTIONS
Bidders shall submit their technical offers in the following way:
1. Contents of the offer shall be given at the beginning of the offer
2. Each chapter shall be separated from the other by divider page
3. Each proposed type of transformer shall be presented in a separate chapter including:
the questionnaire (Summary of Data) filled in and signed, drawings, routine, type and
special tests reports, etc…
4. A separate chapter shall be dedicated for the insulating oil data including
questionnaire (Appendix “D”) filled in and signed
5. A separate chapter shall be dedicated for the Quality assurance and for the Quality
control including: quality manual, ISO 9001 certificates, quality plan and preliminary
inspection and test plan
6. A separate chapter shall be dedicated for the painting data
7. A separate chapter shall be dedicated for the signed declarations
8. A separate chapter shall be dedicated for the know-how agreement
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Edition No.: 4
Issued date: June 2011
Page No. 5 of 85
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
1. GENERAL
1.1.
SCOPE OF SUPPLY
Design, manufacture, furnish and deliver fully tested, three-phase, oil-immersed, core type,
hermetically sealed distribution network power transformers with natural (self) cooling.
The transformers shall be installed in indoor transformer stations.
2. STANDARDS
3.
2.1.
Unless otherwise stated, hermetically sealed distribution network power transformers shall
be designed, manufactured and tested in accordance with the latest published
recommendations of the International Standard IEC 60076.
2.2.
Standards referred to in this Specification and in Supplements to this Specification are
integral parts of this specification unless explicitly stated otherwise.
2.3.
The equipment, including all appurtenances and accessories, shall be fabricated, inspected,
tested and preserved in compliance with the Standards as specified herein, unless otherwise
indicated.
2.4.
In the event that no reference to Standard is made herein, all components and parts shall be
fabricated, inspected, tested and preserved, so as to ensure their fitness for designed use and
purpose.
2.5.
The transformers shall fulfill the requirements of SI 5484 Israeli Standard. (Distribution
transformers - Requirements for energy efficiency and labeling.
In case, during the tender or during contract period the SI 5484 Israeli Standard will be
changed, the Bidder or the Contractor will be required to propose their offer or to supply
transformers, as applicable, which will meet the requirements of the latest published Israeli
Standard regarding energy efficiency and marking.
2.6.
If this Specification contains requirements which differ from those of the above mentioned
Standards except the SI 5484 Israeli Standard or the latest published Israeli Standard
regarding energy efficiency and marking, the requirements of this Specification shall take
precedence.
DOCUMENTS REQUIRED FOR THE PROPOSAL
The Bidder shall submit together with his offer the following documents:
3.1.
Completed filled-in questionnaire signed by the Bidder (Manufacturer)
(Summary of data) for the proposed transformers.
Israel Electric Corporation Ltd.
Marketing Division
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Page No. 6 of 85
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
3.2.
Quality Assurance Manual including Quality Procedures of the factory where transformers
are manufactured/assembled and tested.
3.3.
Manufacturer Experience data to the Purchaser’s satisfaction as required in Appendix "A"
3.4.
Type and special test reports, according to paragraph 7.2 for identical or similar
transformers to those proposed in the Bid, including test circuit, instruments used, test
sequence and description of method.
3.5.
Filled-in and signed type and special tests declaration – Appendix "B".
The Bidder shall guarantee to perform (in case of award), at his own expense, type and
special tests as required in paragraph 7 and submit to the Purchaser the reports, in English,
of these type and special tests before shipment of the ordered transformers.
3.6.
Routine tests for identical or similar transformers to those proposed in the Bid, including
test circuit, instruments used, test sequence and description of method.
3.7.
Filled-in and signed guaranteed losses declaration – Appendix "C".
3.8.
General outline drawing with dimensions, materials, coating, weight, etc.
3.9.
Installation instructions.
3.10. Maintenance instructions (including frequency, procedure and materials required).
3.11. Manufacturer's requirements for prolonged storage (2-3 years) before installation,
taking into account the specific conditions under clause 4.2.
3.12. List of components to be manufactured locally (in Israel) (in case of local production).
3.13. Preliminary inspection and test plan to be performed by the manufacturer.
3.14. ISO 9001 certificate from an Accredited Recognized Certification Body (CB) that is a part
of or belongs to an International Certification Network of CB's.
3.15. Know – How agreement to the Purchaser’s satisfaction (in case of Know How transfer).
The agreement shall meet the requirements as specified in Appendix "D".
3.16. Required schedule for prototype approval of Hermetically Sealed Distribution Network
Power Transformers - Appendix “G”.
3.17. Declaration regarding fulfillment of requirements of SI 5484 Israeli
Standard – Appendix "F".
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Edition No.: 4
Issued date: June 2011
Page No. 7 of 85
3.18. Spare parts data which shall include the following information: Manufacturer name of spare
part, Manufacturer number of spare part, order number of spare part (if any), description of
spare part, and reference number in drawing.
3.19. Technical data of high voltage windings as required in clause 4.16 of this Specification.
3.20. Remarks:
3.20.1. All descriptive material shall be in English or Hebrew.
3.20.2. The Israel Electric Corporation (I.E.C.) reserves the right, at its discretion, to allow
a Bidder to complete such proposal and to submit such documents at a later date,
as prescribed by I.E.C
3.20.3. Only after written approval by the Purchaser, of all the data and the sample
submitted with the offer, the offer may be deemed to be technically acceptable and
the Bidder may be invited to submit his price Bid.
4.
DATA AND TECHNICAL REQUIREMENTS
4.1.
Operating Conditions
4.1.1.
The rated voltages of the distribution systems are 12.6 kV, 22 kV and 33 kV.
4.1.2.
The maximum operating voltages of the above mentioned distribution systems
are 13.8 KV, 24 kV and 36 KV.
4.1.3.
The system rated frequency is 50 Hertz.
4.1.4. The system type is: 3 phase, 3 wire.
The neutral point of the secondary winding of the transformer feeding the
distribution system to which the proposed transformers shall be connected is
grounded as follows:
- for 12.6 kV system, solidly grounded or grounded via a resistor with a factor of
earthing of 106%
- for 22 kV system, resonant grounded via Peterson Coil and might be occasionally
solidly grounded for short periods of time, or solidly grounded or grounded via a
grounding transformer
- for 33 kV system, solidly grounded or resonant grounded via Peterson coil being
occasionally solidly grounded for short periods of time
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Edition No.: 4
Issued date: June 2011
Page No. 8 of 85
It is to be noted that all the distribution systems are operated radially. Ground fault
conditions when the system is resonant grounded may sustain for several hours.
4.1.5. The maximum three phase symmetrical short-circuit value at substation feeding
points of:
- 12.6 kV system is 350 MVA.
- 22 kV system is 500 MVA.
- 33 kV system is 500 MVA
4.2.
Service Conditions
The service conditions shall be according to clause 4 of IEC Standard 60076-1 and
clause 4.3 of IEC Standard 60076-2/1993, with the following additions and modifications:
- Severe atmospheric and industrial air pollution, coal dust, salt spray;
- Long dry period without any rainfall;
- High atmospheric humidity as experienced in coastal areas;
- Direct and continuous brilliant solar radiation for long periods;
4.3.
- maximum relative humidity : 90%;
- average relative humidity : 70%;
- maximum ambient temperature : 55°C;
- daily average temperature : 35°C.
The rated power shall be one of the following: 250, 400, 630 or 1000 kVA
4.4.
The rated line to line primary voltage shall be one of the following: 12.6, 22 or 33 kV.
4.5.
The rated line to line and line to neutral secondary voltage shall be at no-load 400 and 231
volts accordingly.
4.6.
The number of phases shall be 3.
4.7.
The rated frequency shall be 50 Hertz
4.8.
The vector group of connections shall be Dyn11.
4.9.
The short-circuit impedance at full load shall be:
- (4.4 ± 0.4)%, for 250, 400 and 630 kVA transformers
- (6 ± 0.6)%, for 1000 kVA transformers
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Edition No.: 4
Issued date: June 2011
Page No. 9 of 85
4.10. Power Losses and No-Load Current
The maximum guaranteed values of the no-load losses, load losses and no-load
current shall not exceed the values given in the following table:
Rated Primary
Line to Line
Voltage, Un
(kV)
12.6
22
33
Rated
Power
Sn
(kVA)
No-load
Losses
Po
(W)
630
1000
250
400
630
1000
250
400
630
1000
730
940
360
520
730
940
450
650
950
1000
Load Losses
PL (75oC)
(W)
5200
9000
2750
3850
5200
9000
3250
4600
5500
9000
No-Load
Current
Io
(%)
2.0
2.0
2.3
2.1
2.0
2.0
2.3
2.1
2.0
2.0
4.11. Power Losses Costs and Liquidated Damages
4.11.1.
The following words or combinations of words shall have the meaning
appearing next to them:
(a)
(b)
(c)
(d)
(e)
(f)
Guaranteed losses - no load losses and load losses (at 75°C) for
each proposed transformer type (defined by voltage and power),
as declared by the Bidder, at the commercial stage of the tender.
Actual losses - no load losses and load losses (at 75°C) measured
in each transformer actually supplied to the I.E.C.
The original contract period – the period of the contract, entered
into between the I.E.C and the contractor, not including any
extensions thereof and not including the option period.
The option period – the period within which the I.E.C purchases
any transformers from the contractor pursuant to and following
the exercise of the option, granted to it under the contract.
The extension of the original contract period - the period by
which the original contract period is extended either pursuant to
the I.E.C’s right under the contract, or pursuant to the parties’s
mutual consent, as applicable.
The extension of the option period - the period by which the
option period is extended either pursuant to the I.E.C’s right
under the contract, or pursuant to the parties’s mutual consent, as
applicable.
Israel Electric Corporation Ltd.
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Page No. 10 of 85
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
(g) Group of transformers - all the transformers of the same type
(defined by voltage and power), actually supplied to the I.E.C by
the contractor.
(h) Draw order - any order issued by the I.E.C for the supply of the
transformers pursuant to the contract.
(i) Contract - the frame contract or frame order, signed or entered
into between the I.E.C and the contractor, at the conclusion of the
tender.
(j) Second best Bidder - the Bidder, whose price proposal in the
tender is second best to that of the contractor (after weighting all
relevant techno-economical factors, including preference for
locally manufactured goods), as per the I.E.C’s applicable
guidelines for techno-economical evaluations of bid proposals.
4.11.2.
Bidders are required to submit their guaranteed no-load and load losses (at
75°C) for each proposed transformer type (defined by voltage and power) at
the commercial stage of the tender.
4.11.3.
In comparing Bidder's proposals, the guaranteed losses will be taken into
consideration. The financial value attributable to guaranteed power losses
will be evaluated as follows:
- US$ 7950 per Kilowatt for no-load losses.
- US$ 810 per Kilowatt for load losses.
4.11.4.
If it turns out that the actual losses exceed the guaranteed losses, the
contractor shall pay to the I.E.C liquidated damages in accordance with the
terms and conditions, set forth in the following paragraphs.
4.11.5.
If the sum of the actual no-load and load losses of any group of transformers
(as defined above) supplied in the original contract period, exceeds the sum
of the losses guaranteed by the Contractor by more than 5%, the Contractor
will pay liquidated damages according to the rates stipulated in paragraph
4.11.3 above.
The above liquidated damages will be paid by the Contractor as to each
transformer where the sum of actual losses exceeds the sum of guaranteed
losses by more than 5%.
In respect of those transformers where the sum of the actual losses is equal or
lower than 1.05 times the sum of guaranteed losses, no liquidated damages
will be imposed.
Israel Electric Corporation Ltd.
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Edition No.: 4
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Page No. 11 of 85
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
The liquidated damages, payable by the Contractor will be calculated
according to the following formula (as to for each relevant transformer
separately):
C=CO(∆POM-1.05∆POG)+CL(∆PLM-1.05∆PLG)
where:
- C, value of liquidated damages (in US$)
- CO, cost of no-load losses (in US$ per Kilowatt). The value of CO shall
be taken according to above paragraph 4.11.3, only if
(∆POM-1.05∆POG)>0, otherwise CO = 0.
- CL, cost of load losses (in US$ per Kilowatt). The value of CL shall be
taken according to above paragraph 4.11.3, only if (∆PLM-1.05∆PLG)>0,
otherwise CL = 0.
- ∆POM, actual no-load losses (in Kilowatts)
- ∆POG, guaranteed no-load losses (in Kilowatts)
- ∆PLM, actual load losses (in Kilowatts)
- ∆PLG, guaranteed load losses (in Kilowatts)
4.11.6.
At the conclusion of the original contract period, the I.E.C shall
re-evaluate the actual cost to it of each group of the transformers, supplied by
the Contractor during said period. In re-evaluating such cost, the I.E.C shall
substitute the guaranteed losses of such group by the actual losses. The result
of such re-evaluation shall then be compared to the cost of said group of
transformers pursuant to the offer of the second best Bidder, based, among
others, on the tender price and guaranteed losses, declared by said Bidder.
If it turns out, based on such comparison, that the Contractor would not have
won the award for said group of transformers, had he declared the actual
losses (rather than the guaranteed losses), then the Contractor shall pay to the
I.E.C additional liquidated damages, equal to the difference, if any, between
the total cost to the I.E.C of the relevant group of transformers under the
Contractor ’s offer (calculated on the basis of the actual losses) and the total
cost of the same group of transformers under the offer of the second best
Bidder, plus ten (10%) percent of the total contract price of such group of
transformers, adjusted to the date of the re-evaluation. It is clarified, that the
liquidated damages, payable under this paragraph shall be in addition to the
liquidated damages, if any, payable under the provision of the previous
paragraphs, above.
4.11.7.
The provision of the previous paragraphs 4.11.5 and 4.11.6 shall also apply
as to each group of transformers, supplied during the option period, the
extension of the original contract period and the extension of the option
period (as such combination words are defined above), if applicable, subject
only to the following modification: anywhere, in the previous paragraph,
where the words “original contract period” appear, they shall be substituted
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Edition No.: 4
Issued date: June 2011
Page No. 12 of 85
by words “option period”, or “the extension of the original contract period”,
or “the extension of the option period”, as applicable.
4.11.8.
If the actual losses of any transformer exceed the guaranteed losses plus
tolerances (the tolerances are specified in Standard IEC 60076) or exceed the
losses given in Table 1 and Table 2 of Standard SI 5484, the transformer will
be rejected and the contractor shall be charged with any applicable liquidated
damages for the delay, if any, in the delivery of such transformer. In the
event that the quantity of rejected transformers in any given period of six
months (beginning on the date of the first supply pursuant to the first draw
order and every period of six months thereafter) exceed four (4%) percent of
the total number of transformers, supplied during such period, the contractor
shall be in a substantial breach of contract, entitling the I.E.C to pursue any
legal remedy, available, under the law, for such a breach.
4.12. Temperature Rise
The temperature rise of the top layer of the oil shall not exceed 60 degrees Celsius.
The temperature rise of the windings (measured from the resistance change)
shall not exceed 65 degrees Celsius.
4.13. Insulation Levels
The requirements concerning insulation are summarized in the following table:
Rated
Line to Line
Voltage, Un
(kV)
12.6
22
33
0.4
4.14. Noise Level
System Highest
Line to Line
Voltage, Um
(kV)
13.8
24
36
-
Basic Insulation
Level
BIL (1.2/50µs)
(kV peak)
95
125
170
-
One Minute Withstand
Voltage (r.m.s.)
at frequency of 50Hz
(kV r.m.s.)
38
50
70
3
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Edition No.: 4
Issued date: June 2011
Page No. 13 of 85
The maximum noise level (A-weighted surface sound pressure level) shall not exceed the
values given in the following table and measured at a distance of one meter from the
transformer. The noise level test shall be performed according to Standard IEC 60076-10
using noise level meter periodically calibrated according to IEC 61672-3. Additionally the
technical specification of the noise level meter shall state that noise level meter meets the
requirements of the IEC 61672. All relevant documents shall be presented to the I.E.C
before performing noise level tests.
Rated Power, Sn
A-Weighted Surface
Sound Pressure Level
(kVA)
LpA
(dB(A), 1m)
250
48
400
50
630
52
1000
54
4.15. Dimensions
The maximum dimensions of the transformers shall not exceed the values given in the
following table:
Rated Power, Sn
(kVA)
630
Height
(mm)
Width
(mm)
Length
(mm)
1845
960
1570
4102380
1600
760
1280
4102398
1670
840
1470
2078079
1845
1070
1570
1000
2691699
1845
1070
1570
250
4102406
1850
1000
1280
4102414
1950
1010
1450
2078103
2030
1070
1730
3702891
2030
1070
1730
1000
Rated Line to Line
Voltage Un (kV)
12.6
250
400
630
400
630
1000
22
33
I.E.C catalogue
number
2078046
2691681
In case the Bidder can not meet the maximum dimensions requirements in
transformers up to 400kVA. The Bidder may offer greater dimensions subject
Israel Electric Corporation Ltd.
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Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
to I.E.C approval during technical stage of the tender.
4.16. Windings
• The winding materials shall be:
- copper wire (for high voltage (12.6,22,33 kV) windings);
- copper foil (for low voltage (0.4 kV) windings).
• The 3 (three) High Voltage windings of the transformer shall be identical in order to
allow interchangeability.
• The High Voltage windings shall be covered with insulation paper.
Technical data of the High Voltage windings (dimensions, number of turns,
thickness and type of wire, etc..) shall be supplied to Purchaser for purposes of
windings repair, in Purchaser's workshops.
The data shall be submitted to I.E.C together with the offer, or when submitting
documents to I.E.C for prototype approval.
4.17. Core
The transformer shall be of the core type and not the shell type.
4.18. Tap Changer
Every transformer shall be equipped with an off-load tap changer on the high voltage side
permitting adjustment to voltages of:
• -5%, 0%, +5% of the rated voltage for 22 and 33 kV transformers
• -5%, -2.5%, 0%, +2.5%, +5% of the rated voltage for 12.6 kV transformers
• The Bidder may offer additional taps within range of ±5%
The tap changer shall be operable manually from outside the transformer when the
transformer has no input voltage applied.
The tap changer shall be of a type approved by the Israel Electric Corporation. Presently,
type ASP (Appareils Scientifiques de Precision - France).
The head of the tap-changer on the transformer lid shall be of cast aluminium or steel.
4.19. High Voltage Plug-In Bushings
Three plug-in bushings shall be installed on the high voltage side of each transformer.
Israel Electric Corporation Ltd.
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Page No. 15 of 85
Specification NTS-104
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Hermetically Sealed
Distribution Network Power Transformers
Distance between centers of the high voltage bushings shall be: 400 ± 5% (mm)
The bushings shall be in accordance with Standard DIN 47636 Part 1 type ATL 36-400.
These bushings shall allow connection of cables to the transformer (one cable per phase) by
means of a "cable connector" ("Tee connector") suitable for nominal current of 400A. The
"Tee connectors" shall be supplied by the Israel Electric Corporation (presently
ELASTIMOLD) while the Manufacturer shall supply the suitable bushings installed as high
voltage connections of the transformer. The bushings shall have an M16 thread.
The Bidder shall submit to the Purchaser together with his offer type tests reports of the
proposed high voltage plug-in bushings for approval.
The type tests shall be performed according to DIN VDE 0278 Part 6 Table 2.
The following high voltage plug-in bushings are already approved by I.E.C:
- ELASTIMOLD, type M 400 AR-3/J
- COMEM, type PPS 36/400
The Bidder who offers the above mentioned approved high voltage bushings
does not have to submit type tests reports of these bushings.
The plug-in bushings and their base shall be well protected against dust
accumulation and water penetration until transformer installation with rigid
plastic covers.
4.20. Low Voltage Bushings and Low Voltage Connection Clamps
Four bushings shall be installed on the low voltage side and shall comply with
Standard EN50386:2002 as follows:
- For 250-400 kVA transformers Ir 630 A, Type 3;
- For 630 kVA transformers Ir 1250 A, Type 4;
- For 1000 kVA transformers Ir 2000 A, Type 5
All exposed metal parts of bushings shall be electrotinned. The minimum tin coat
thickness shall be 20 µm.
The connection clamps to be supplied by the Contractor shall be:
for 250 kVA transformers according to the following Drawing 1,
Israel Electric Corporation Ltd.
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Page No. 16 of 85
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
for 400 and 630 kVA transformers according to the following Drawing 2,
for 1000 kVA transformers according to the following Drawing 3..
The connection clamps shall be electrotinned.
Israel Electric Corporation Ltd.
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Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Edition No.: 4
Issued date: June 2011
Page No. 17 of 85
Voltage (kV)
Power (kVA)
Current (A)
22, 33/0.4
250
630
DRAWING 1: LOW VOLTAGE CONNECTION CLAMP FOR 250 kVA TRANSFORMERS
Israel Electric Corporation Ltd.
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Specification NTS-104
For
Hermetically Sealed
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Edition No.: 4
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Page No. 18 of 85
Voltage
Power
Current
Thread D
(kV)
(kVA)
(A)
(mm)
22, 33/0.4
400
630
M20
12.6, 22, 33/0.4
630
1250
M30 x 2
DRAWING 2: LOW VOLTAGE CONNECTION CLAMP FOR 400 AND 630 kVA
TRANSFORMERS
Israel Electric Corporation Ltd.
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Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Edition No.: 4
Issued date: June 2011
Page No. 19 of 85
Voltage (kV)
Power (kVA)
Current (A)
Thread D (mm)
12.6, 22, 33/0.4
1000
2000
M42 x 3
DRAWING 3: LOW VOLTAGE CONNECTION CLAMP FOR 1000 kVA TRANSFORMERS
Israel Electric Corporation Ltd.
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Page No. 20 of 85
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
4.21. Method of Cooling
The cooling method of the transformers shall be: ONAN.
4.22.
Grounding Screws
A M12 threaded grounding screw shall be welded on the skid, near the drain tap.
A second grounding screw shall be welded on the transformer lid at the low voltage side.
4.23.
Nameplates
The transformer shall be fitted with a nameplate in Hebrew which contains all the items
requested by Standard IEC-60076/1 In addition to the above requirements, the nameplate
shall contain the actual value of the noise level (A-weighted surface sound pressure) of the
transformer measured in dB(A) at a distance of one meter from the transformer.
In all other transformers which the noise level (A-weighted surface sound pressure) was not
measured the result value from the type test measurement shall be written in the nameplate.
The diagram of connections between High Voltage windings, tap changer and High Voltage
bushings shall also be marked on the nameplate. See drawings no. 4 and its translation in
English, drawing no 5.
The energy efficiency of the transformer shall be marked according to the requirements of
the Israeli Standard no. SI 5484.
I.E.C catalogue number and the number of this specification shall also appear in the
nameplate.
The nameplate itself shall be made of anodized sheet aluminium.
The nameplate shall be installed on the low voltage connections side.
The nameplate shall be approved by I.E.C.
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Edition No.: 4
Issued date: June 2011
Page No. 21 of 85
η
* Note: To be used in 12.6 kV transformers
DRAWING NO. 4: RATING PLATE in HEBREW
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Edition No.: 4
Issued date: June 2011
Page No. 22 of 85
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
η
* Note: To be used in 12.6 kV transformers
DRAWING NO. 5: RATING PLATE in HEBREW with translation into ENGLISH
4.24.
Marking
Israel Electric Corporation Ltd.
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National Network Unit
Edition No.: 4
Issued date: June 2011
Page No. 23 of 85
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
4.24.1.1. The phase to be connected to each bushing shall be marked
next to it in the following manner:
A;B;C on the primary voltage side
a;b;c;n on the secondary voltage side
next to the grounding screw
The above marking shall be stamped and red color painted on tin plates
which shall be fastened with glue on the transformer lid. The marking
next to grounded screws shall not be painted.
4.24.1.2. The Serial number, power (in kVA) and voltage (in kV) of the
transformer shall be marked on the transformer lid in white letters, 4 cm
high.
The format of the markings shall be:
first line: AA/YY/XXXXXX/XXXX, where
AA - Manufacturer code (will be given by the Purchaser after
notification of the award), two (2) letters,
YY - year of manufacture, two (2) digits,
XXXXXX - series, six (6) digits,
XXXX - serial number of the transformer, four (4) digits,
second line: PPPP/VVV, where
PPPP - rated power of the transformer in kVA, up to four (4) digits,
VVV - rated line to line primary voltage of the transformer in KV, up to
three (3) digits
for example: AA/09/012345/0001
630/22
4.24.1.3. The location of the marking shall be approved by I.E.C during prototype
approval.
4.24.1.4. An identification plate with the transformer stamped serial number shall
be installed on the transformer core in order to allow identification of the
transformer parts taken for repair.
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Edition No.: 4
Issued date: June 2011
Page No. 24 of 85
4.25.
Warning Plates
4.25.1.
On the upper side of each transformer, the Manufacturer shall install a
warning plate with the following content:
‫אזהרה‬
".‫"אסור לחבר מתח לשנאי כאשר התקע אינו מחובר לשקע‬
4.25.2.
Near the emptying tap of each transformer, the Manufacturer shall install a
warning plate with the following content:
‫אזהרה‬
." ‫"אין לקחת דגימת שמן משנאי זה‬
4.25.3.
The warning plates shall be of an approved type by Israel Electric Corporation
Ltd. The plates shall be made of anodized sheet aluminium.
For more details of the warning plates see drawing no. 6
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Edition No.: 4
Issued date: June 2011
Page No. 25 of 85
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
DRAWING NO. 6: WARNING PLATES
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Edition No.: 4
Issued date: June 2011
Page No. 26 of 85
4.26.
Painting
The painting of transformer tank, lid and all other steel parts shall be performed in
accordance with Manufacturer's Standard procedure and approved by Purchaser.
The colour of the top-coat shall be medium grey (RAL 7023 or BS 694).
The minimum requirements for approval are the following:
a. Cleaning by sandblasting to "near white" SA 2½ according to ISO 8501-1:1988.
b. Painting with one coat of anticorrosive primer, zinc-chromate alkyd based; minimum
dry film thickness shall be 30 micrometers.
c. Painting with one coat of intermediate paint, red iron oxide alkyd based; minimum
dry film thickness shall be 30 micrometers.
d. Painting with medium grey top-coat alkyd based; minimum dry film thickness 30
micrometers.
Remarks:
-
4.27.
The minimum total dry film thickness of the paint system except for the lid shall be
90 micrometers.
With respect to the lid, the first and second coats shall be of double thickness so that
the minimum total dry film paint thickness of the lid shall be 150 micrometers.
Lifting Lugs
Two (2) lifting lugs shall be welded on the transformer lid and shall be of at least
5 cm internal diameter.
4.28.
Plates for installation of the protection nets
Steel plates 5 mm thick shall be welded on the transformer lid for installing of protection
nets (against any accidental touch). The protection nets will be supplied and installed by
IEC. The arrangement of the welded steel plates is shown in drawing no. 7 (for
transformers 250 ÷630 kVA) and in drawing no. 8 (for 1000kKVA transformers)
4.29.
Type of Oil
The insulating oil filled in transformer shall meet the requirements stated in Purchaser
"Specification For Mineral Insulating Oil Supplied With/Within New Electrical
Equipment" no.50 dated 1/7/09 - Appendix "E" of this specification.
(Data required in this Specification no. 50 shall be submitted to the Purchaser).
The amount of oil in the transformer shall not exceed 1000 litters.
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Edition No.: 4
Issued date: June 2011
Page No. 27 of 85
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
DRAWING NO. 7: ARRANGEMENT OF THE STEEL PLATES FOR INSTALLATION OF
PROTECTION NETS IN 250 ÷ 630 kVA SEALED TYPE
TRANSFORMERS
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Edition No.: 4
Issued date: June 2011
Page No. 28 of 85
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
DRAWING NO. 8: ARRANGEMENT OF THE STEEL PLATES FOR INSTALLATION OF
PROTECTION NETS IN 1000 kVA SEALED TYPE TRANSFORMERS
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Edition No.: 4
Issued date: June 2011
Page No. 29 of 85
4.30.
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Oil level indicator
The transformer shall be equipped with a magnetic oil level indicator, mounted on the
transformer lid. The window of the oil level indicator shall be directed towards the low
voltage side of the transformer.
4.31.
Transformer Filling Opening
The transformer shall be equipped with an oil filling opening (2" diameter minimum)
covered by a suitable threaded cap.
4.32.
Drainage of the Transformer Tank
There shall be an opening at the bottom of the transformer tank for removing oil, in the
form of a 1" spherical tap, of high quality (emptying tap).
The bottom of the transformer tank and the oil drain opening shall be designed so that the
drainage of the bottom of the transformer tank is complete.
The tap shall be located at the bottom of the transformer tank on the low voltage bushing
side.
4.33.
Overpressure Relief Device
The transformer shall be equipped with an overpressure relief device of a type approved
by the Israel Electric Corporation.
The overpressure relief device shall be covered with a suitable "cover" to protect persons
in the vicinity of the transformer against the spurting of hot oil in the event of an internal
fault of the transformer. The cover (window of the cover) shall be directed toward high
voltage side of the transformer.
The "cover" shall be of a type approved by the Israel Electric Corporation Ltd.
4.34.
Thermometer Pocket
The transformer shall be equipped at the top with a cylindric pocket
(internal depth: 150mm, 3/4" Gas inner threaded diameter) for a thermometer to measure
the oil temperature.
The transformer shall be supplied with the thermometer pocket filled with oil and capped.
The transformer pocket shall be welded on the transformer lid. See drawing no.9
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Edition No.: 4
Issued date: June 2011
Page No. 30 of 85
4.35.
Transformer base and wheels
The base specification for transformers with rated line to line voltage of 12.6kV and
22kV, is given in drawing 10. The base specification for transformers with rated line to
line voltage of 33kV is given in drawing 11.
Transformers shall be supplied with bases on which wheels can be mounted. The wheels
themselves and their mounting shall be in accordance with a special order.
4.36.
Tie-Downs
The four top corners of the transformer shall be fitted with steel tie-downs for slings
(the tie-down slings) to be used during transportation.
The steel tie-down shall be half ring of 50mm internal diameter.
The cross section of the ring shall be circular of 10mm diameter.
Tie-downs arrangement on transformer lid is given in following sketch:
Transformer
Tie-down
Transformer lid
4.37.
Transformer weight
The maximum transformer weight (including oil) shall not exceed 4000 kg.
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Edition No.: 4
Issued date: June 2011
Page No. 31 of 85
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
DRAWING NO. 9: THERMOMETER POCKET
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Edition No.: 4
Issued date: June 2011
Page No. 32 of 85
I
42
45
45
45
H
130
145
145
145
G
65
80
80
80
E
535
535
570
570
D
460
505
550
550
C
461
455
490
490
B
545
545
580
580
A
1060
1180
1200
1570
kVA
250
400
630
1000
DRAWING NO. 10: BASE FOR TRANSFORMERS WITH RATED LINE TO LINE VOLTAGE OF 12.6 kV AND 22 kV
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Edition No.: 4
Issued date: June 2011
Page No. 33 of 85
I
45
45
45
45
H
145
145
145
145
G
80
80
80
80
E
590
630
670
670
D
500
530
595
595
C
510
550
590
590
B
600
640
680
680
A
1150
1250
1370
1570
kVA
250
400
630
1000
DRAWING NO. 11: BASE FOR TRANSFORMERS WITH RATED LINE TO LINE VOLTAGE OF 33 kV
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Edition No.: 4
Issued date: June 2011
Page No. 34 of 85
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
5. Criteria for final comparison of Bidders offers
see Appendix "J"
6. PROTOTYPE
6.1.
The successful Bidder (henceforth referred to as "the Contractor") shall manufacture one
transformer prototype of each ordered type (defined by voltage and power) for Purchaser's
approval.
The Contractor shall submit to the Purchaser one set of drawings of the prototypes for
Purchaser's approval.
The drawings shall show the overall outside dimensions, mounting dimensions, and gross
weight for the prototype, as well as details of base, cooling fins, tap changer, terminals,
primary and secondary bushings, H.V. and L.V. connection schemes, nameplate, warning
plates, overpressure relief device and its cover, tank, lid, steel plates for installation of
protection nets, oil type. In addition, data of the windings, transformer core and structure
shall be shown in a separate drawings.
6.2.
The following items shall be approved during the prototype approval:
- High Voltage and Low Voltage Bushings
- Tap changer
- Overpressure relief device
- Cover for Overpressure Relief Device
- Type of oil
- Oil level indicator
- Emptying tap
- Groundings screws
- Nameplate
- Painting
- Marking
- Transformer base
- Lifting lugs
- Tie-Downs
- Thermometer pocket
- Warning plates
- Wheels
- Steel plates for installation of protection nets
6.3.
After approval of the above items no changes will be allowed without written approval of
the National Network Unit. This approval will be given only in Special cases where severe
problems should arise with Subsuppliers of Contractor.
In addition to the routine tests which shall be performed in any case on each transformer,
the Contractor shall perform the type and special tests on the prototype. The above tests
Israel Electric Corporation Ltd.
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Edition No.: 4
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Page No. 35 of 85
Specification NTS-104
For
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Distribution Network Power Transformers
shall be performed according to this Specification and according to IEC 60076 Standard.
The above type and special tests shall be performed only after Purchaser's visual inspection
and preliminary approval of the prototype.
6.4.
The Contractor shall supply the Purchaser 3 (three) copies, in English, of the reports of the
above routine, type and special tests for Purchaser's approval and for Purchaser's final
approval of the prototypes.
6.5.
After Purchaser's final approval of the prototypes, as soon as possible after tests, but before
delivery of the rest of the transformers, the Contractor shall submit to the Purchaser 2 (two)
copies of each routine test report.
In addition, the routine test reports shall be submitted to IEC on magnetic media, in diskette
form. The format of the results shall be done according to Appendix "E".
6.6.
The Purchaser is entitled to cancel the order for the supply of transformers if the prototypes
are not approved by the Purchaser.
6.7.
In any case, the Contractor shall not manufacture the rest of the transformers ordered before
receiving the Purchaser's final approval of the prototype.
6.8.
Any submitted data, report, drawing or descriptive material not written in English or
Hebrew will not be accepted. All dimensions shall be stated in metric units.
6.9.
The Contractor shall supply to the Purchaser, if required, and by a particular order at any
time during a period of 25 years from last Purchaser's order, spare parts (coils, etc..) for the
previously ordered transformers, in the quantities that are needed by the Purchaser for
repair of damaged transformers of Contractor's manufacture.
The Contractor shall supply to the Purchaser together with the ordered transformers the
spare parts in quantities given in the following table:
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Edition No.: 4
Issued date: June 2011
Page No. 36 of 85
Spare
Part
Number
Name of Spare Part
Quantity of Spare Parts
(in per cent of ordered quantity of
transformers in the tender)
1.
High Voltage Coil
2%
2.
Low Voltage Coil
2%
3.
Tap-Changer
4%
4.
High Voltage Bushing
3%
5.
Low Voltage Bushing
3%
6.
Stem of Low Voltage Bushing
4%
7.
Low Voltage Connection Clamp
5%
8.
Overpressure Relief Device
9.
Oil Level Indicator
10.
Emptying Tap of Transformer Tank
11.
Transformer Tank
0.5%
2%
0.5%
1%
The spare parts shall be supplied together with spare part list which includes the
information stated in paragraph 3.18.
In the event the Bidder is of the opinion that the Purchaser should buy other recommended
spare parts, such spares should be specified in the Technical proposal.
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Edition No.: 4
Issued date: June 2011
Page No. 37 of 85
7.
TESTS
7.1.
General requirements for tests
The tests shall be performed in accordance with the latest published recommendations of
the International Standard IEC 60076 and this Specification by and at the expense of the
Manufacturer.
For High voltage bushings tests please refer to clause 4.18.
7.2.
Type and Special Tests
7.2.1. The following type tests and special tests shall be performed on only one
transformer prototype of the ordered type (defined by voltage and power):
- Lightning impulse test on line terminals.
- Temperature rise test
- Noise level(on not less than three transformers of each ordered type of
transformer: first test at prototype approval stage, second test at 30% of the
supply scope and third test at 60% of the supply scope)
- Short-circuit test
7.2.2. The sum of the measured no-load and load losses of the transformer, on which type
and special tests will be performed, shall be equal or less than the sum of its
guaranteed no-load and load losses.
7.2.3. Type and Special Test Reports
The type and special test reports shall state according to which standard the tests
were performed. The test reports shall specify the conditions of the test and the
actual values received during the type tests. It shall state the names and have the
signatures of those who performed the type tests, those who approved the type tests
reports and those who witnessed the tests.
7.2.4. The type and special test reports shall contain a detailed drawing of the tested
equipment, photos of the equipment prior to and after the test.
7.2.5. In successful type test the following words must be written in the test report:
"The transformer passed the test successfully according to IEC 600076-X Standard
(X – relevant standard)"
7.2.6. The type and special test reports of this Specification shall be submitted to
Purchaser.
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Specification NTS-104
For
Hermetically Sealed
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Edition No.: 4
Issued date: June 2011
Page No. 38 of 85
7.3.
Type and special tests laboratories:
7.3.1. Type and special tests shall be performed in one of the following international
laboratories:
• F.G.H (Germany)
• I.P.H (Germany)
• CESI (Italy)
• KEMA (Netherlands)
• VEIKI-VNL (Hungary)
In order to perform the type and special tests in other laboratories a prior
written approval by I.E.C National Network Unit is required at the technical
stage of the Bid.
The Contractor shall perform those type and special tests in well-known authorized
laboratories (ISO/IEC 17025 or EN 45011 approved). I.E.C reserves the right to
approve laboratories (situated in Israel and without ISO/IEC 17025 or EN 45011
certification) to perform those tests, after successful audit by the I.E.C Electrical
R&D Laboratory.
7.3.2. The Contractor shall submit to the I.E.C National Network Unit, forty five (45) days
before performing those type and special tests, the names of the laboratories and the
programs of those type and special tests for I.E.C approval.
7.3.3. I.E.C reserves the right to participate in those type and special tests.
7.4.
Routine Tests
7.4.1.
A routine test shall be performed by the Contractor for each ordered transformer
7.4.2.
Duly certified routine tests are obligatory. Such tests shall be performed at the
Manufacturer’s laboratory.
7.4.3. Each supplied transformer shall be tested in accordance with IEC 60076-1
Standard.
7.4.4.
7.4.5.
I.E.C reserves the right to participate in those routine tests. The Contractor shall
notify I.E.C two weeks before those tests performance, in order to allow I.E.C staff
to participate in those tests.
Energy efficiency value shall be stated in the Routine Test Report.
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Edition No.: 4
Issued date: June 2011
Page No. 39 of 85
7.4.6.
7.5.
In addition, at least one transformer of each series of transformers which were filled
with oil in the same day and from the same tank of oil, shall be tested for
withstanding oil breakdown voltage only - in accordance with Appendix "E".
The results shall be reported to I.E.C Quality Control staff.
Routine Test Report
• Every transformer shall be tested in accordance with, and shall withstand, the tests
specified in the IEC-60076 Standard as "Routine Tests".
• The routine test report shall state according to which standard and clause the test was
performed.
• The Routine Test Report shall contain the transformer rated data, serial number and the
results of the tests, the required values and the actual values obtained during the test.
• The routine tests reports shall be submitted to Purchaser up to one month prior to
delivery of the first batch of the offered transformers.
• In addition, the routine test reports shall be submitted to IEC on magnetic media, in
diskette form. The format of the results shall be done according to Appendix "G".
• Energy efficiency shall be written in the routine Test report.
• The results of the No-load losses, Load losses derived from the routine tests shall be
send to the Quality Control of the I.E.C and to the National Network Unit by E-mail by
Microsoft Excel files as follows: Frame order number, date of supply, transformer
serial number, no-load losses, load losses
8.
Quality requirements
8.1.
Quality Assurance
The Quality Assurance requirements are according to the attached documents of the supply
and storage division.
8.2.
Quality control
The quality control measures applied during the production of the transformers shall
conform to the requirements specified in Appendix "H". In addition to the requirements of
Appendix "H" (Q-APP-02, Rev. 4) the bidder shall submit with his proposal a preliminary
Quality Plan and Inspection and test Plan (as defined in clauses 2.3 and 2.7 of Q-APP-02).
Representatives of the Israel Electrical Corporation shall be authorized to visit the
Manufacturer's plant, witness tests and obtain full details of each phase of the transformer's
production.
After product approval by the contractor’s personnel, the purchaser quality control
representative will inspect a sample according to International Standard
ISO 2859 – 1 “sampling procedures for inspection by attributes”. Inspection level II,
acceptance number 0 and rejection number 1.
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Edition No.: 4
Issued date: June 2011
Page No. 40 of 85
9.
SUMMARY OF DATA
(to be filled separately for each proposed type of transformers)
Summary Of Data For Hermetically Sealed Distribution Network Power Transformers
Name of Bidder: ______________________
Rated Primary Line to Line voltage: ___________ kV
Rated Power: ____________ kVA
Signature of Bidder
_____________________
9.1. DRAWINGS, INSTRUCTIONS AND WEIGHT
9.1.1 Drawings of the transformer (including overall
dimensions) …...........................(attached/not attached)
9.1.2 Mounting instructions ...................(attached/not attached)
9.1.3 Drawing of the nameplate ...........(attached/not attached)
9.1.4 Drawings of warning plates ........(attached/not attached)
9.1.5 Drawing of the primary voltage connectors
..............................................................(attached/not attached)
9.1.6 Drawing of the secondary voltage connectors
......................................................(attached/not attached)
9.1.7 Weight of the transformer (including oil) ................ (kg)
9.1.8 Amount of oil in the transformer............................(litres)
9.1.9 Painting specification ...................(attached/not attached)
9.2 OVERALL DIMENSIONS (including all accessories
and appurtenances )
9.2.1 Height .................................................................... (mm)
9.2.2 Width ..................................................................... (mm)
9.2.3 Length .................................................................... (mm)
9.3
GENERAL DATA
9.3.1 What is the type number of the proposed transformer?
(Insert all data in this
column)
Israel Electric Corporation Ltd.
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Specification NTS-104
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Name of Bidder: _______________________
Signature of Bidder
_____________________
9.3.2 Rated primary line to line voltage ........................ (kV)
9.3.4 Rated secondary line to line voltage..................... (kV)
9.3.5 Rated frequency .................................................. (Hz)
9.3.6 Number of phases ...............................................
9.3.7 Identification symbol cooling method (method of
cooling)
9.3.8 Group of connection
9.3.9 Rated power ...................................................... (kVA)
9.3.10 Short-circuit impedance at rated current ..............(%)
9.3.11 Rated insulation level at the primary voltage side
9.3.11.1 BIL (1.2/50µsec) ............................... (KV peak)
9.3.11.2 at a frequency of 50 Hz, for one minute
…………………………………………….(kV r.m.s.)
9.3.12 Rated insulation level on the secondary voltage side
at a frequency of 50 Hz, for one minute
……………………………………………….(kV r.m.s.)
9.3.13 Is the customers list with quantities of transformers
attached? ..................................................... (Yes/No)
9.3.14 Does the oil comply with the Specification given in
Appendix "E" of this Specification? ............. (Yes/No)
9.3.15 Temperature rise of the top layer of oil ................ (K)
9.3.16 Temperature rise of the windings ........................ (K)
9.3.17 Noise level (A-weighted surface sound pressure level
[LpA]) measured at a distance of one meter) ....(dB(A))
(Insert all data in this
column)
Israel Electric Corporation Ltd.
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Edition No.: 4
Issued date: June 2011
Page No. 42 of 85
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Name of Bidder: _______________________
Signature of Bidder _____________________
9.4
(Insert all data in this
column)
STRUCTURE AND ACCESSORIES
9.4.1 Windings shape and material (eg. foil, round, square, Al,
Cu, etc)
9.4.1.1 Material of the windings................................
9.4.1.2 Shape of the windings...................................
9.4.1.6 Average windings temperature rise limits at rated
current ……………………............. (K)
9.4.1.7 Manufacturer name of the windings
9.4.2 Is the primary voltage bushings catalogue attached?
………………....................................... (Yes/No)
9.4.3 Is the secondary voltage bushings catalogue attached?
………………........................................ (Yes/No)
9.4.4 What is the minimal distance between live and earthed
metal parts ……………………….……....... (mm)
9.4.5 Are the 3 (three) high voltage windings of the transformer
identical in order to allow interchangeability?....
(Yes/No)
9.4.5 High voltage bushings
9.4.5.1 Number of high voltage bushings ........................
9.4.5.2 Rated voltage of the high voltage bushings
..(KV)
9.4.5.3 Rated current of the high voltage bushing ......(A)
9.4.5.4 Are the high voltage bushings of identical type to
this described in Standard DIN 47636 Part 1 type
ATL 36-400? ....................................... (Yes/No)
9.4.5.5 High voltage bushings complying with Standard
..
9.4.5.6 Name of the high voltage bushings manufacturer
and its type .......................................................
9.4.5.7 Distance between centers of the high voltage
bushings ................................................... (mm)
Primary
voltage side
Secondary
voltage side
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Edition No.: 4
Issued date: June 2011
Page No. 43 of 85
Name of Bidder: _______________________
Signature of Bidder
_____________________
9.4.5.8 Do the high voltage bushings have a M16
thread? ..............................................(Yes/No)
9.4.5.9 Do the proposed plug-in high voltage bushings
allow connection of ELASTIMOLD TEE
K400TB and M400TB type connectors?
...........................................................(Yes/No)
9.4.6 Low Voltage Bushings
9.4.6.1 Number of low voltage bushings .......................
9.4.6.2 Rated voltage of the low voltage bushings ..
(KV)
9.4.6.3 Creepage distance of the low voltage bushing
...................................................................(mm)
9.4.6.4 Rated current of the low voltage bushing ..... (A)
9.4.6.5 Low voltage bushings complying with Standard
..
9.4.6.6 Name of the low voltage bushings manufacturer
and its type ................................................
9.4.6.7 Is the neutral low voltage bushing the same as the
phase low voltage bushing ? ................(Yes/No)
If not, note the rated voltage, creepage distance,
rated current name and number of Standard and
name of manufacturer ..........................
9.4.6.8 Distance between centers of the low voltage
bushings ...............................................(mm)
9.4.6.9 Distance between live parts of the low voltage
bushings .............................................(mm)
9.4.6.10 Minimum distance between low voltage live
parts and metallically grounded parts ......(mm)
(Insert all data in this
column)
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Edition No.: 4
Issued date: June 2011
Page No. 44 of 85
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Name of Bidder: _______________________
Signature of Bidder
_____________________
9.4.7 Type and manufacturer of overpressure relief device.
Please add technical data of the device.
Data ........................................... (attached/not attached)
Drawings ......................................(attached/not attached)
9.4.8 Ratings of the tap changer ………………………..(%)
9.4.8.1 Tap changer type ……………………….
9.4.8.2 Tap changer manufacturer name ……….
9.4.8.3 Number of taps …………………………
9.4.9 Are the proposed transformers of the core type?
……………………………………………….(Yes/No)
9.4.10 Is the overpressure relief device covered with a"cover"
to protect persons in the vicinity of the transformer
against the spurting of hot oil in the event of an internal
fault?..............................................................(Yes/No)
Please attach relevant drawings of the "cover".
Drawings .................................(attached/not attached)
9.4.11 Oil Tests
9.4.11.1 According to which Standards the oil test is
carried out ? ………………………………..
9.4.11.2 Does the oil comply with the requirements for
oil given in Appendix "E" of this Specification ?
..................................................... (Yes/No)
9.4.11.3 If not, to which Standards ? ...............................
9.4.11.4 Is the oil data (as requested in Appendix "E" of
this Specification) included in the Bidder's
proposal? ..................................... (Yes/No)
9.4.12 Is the Manufacturer's Quality Control Manual included
in the Bidder's proposal ? ................................... (Yes/No)
9.5. HIGH VOLTAGE BUSHINGS TYPE TESTS
9.5.1 Are the high voltage bushings type tests reports
according to DIN VDE 0278 part 6 table 2
attached to the Bidder's proposal? .................
………………………..(attached/not attached)
(Insert all data in this
column)
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Edition No.: 4
Issued date: June 2011
Page No. 45 of 85
Name of Bidder: _______________________
Signature of Bidder
_____________________
9.6 ROUTINE TESTS
9.6.1
9.7.
Are the routine tests carried out according to the
IEC 60076-1 Publications ? ..................... (Yes/No)
TYPE TESTS AND SPECIAL TESTS
9.7.1 Tests of temperature rise
9.7.1.1 Are the temperature rise tests carried out according
to the latest IEC 60076-2 Publication?
……………………………. (Yes/No)
9.7.1.2 Is the temperature rise test report included in the
Bidder's proposal ? .................................. (Yes/No)
9.7.2 Tests of the insulation levels and dielectric tests.
9.7.2.1 Are the insulation levels and dielectric tests carried
out according to the latest IEC 60076-1 and IEC
60076-3 Publications? ............................. (Yes/No)
9.7.2.2 Are the insulation level and dielectric test reports
included in the Bidder's proposal ? .......... (Yes/No)
9.7.3 Ability to withstand short-circuit tests
9.7.3.1 Is the short-circuit withstand test carried out
according to latest IEC 60076-5 Publication?
………………………….. (Yes/No)
9.7.3.2 Is the ability to withstand short-circuit tests report
included in the Bidder's proposal? ............(Yes/No)
9.7.4 Noise level test
9.7.4.1 Is the noise level test carried out according to latest
IEC 60076-10 Publication? ………….. (Yes/No)
9.7.4.2 Is the noise level test report included in the Bidder's
proposal? ..............................................(Yes/No)
9.8 Do the transformers fulfill the requirements of the SI 5484
standard ? (Distribution transformers - Requirements for
energy efficiency and labeling)
..............................................(Yes/No)
(Insert all data in this
column)
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Edition No.: 4
Issued date: June 2011
Page No. 46 of 85
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
10 - CONFORMITY WITH PROPOSAL DOCUMENTS
Supplier hereby certifies that he agrees to all provisions of the Proposal Documents unless exceptions
are specifically and clearly listed in the proposal and identified as exceptions.
Supplier's printed terms and conditions are not considered specific exceptions. Any exceptions which
Supplier has taken are listed on Page
.
Supplier hereby certifies that he agrees to all conditions of the Cover Letter of The Israel Electric
Corporation Limited which accompanied the Proposal Documents.
Signature of Supplier
Date of Proposal
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Edition No.: 4
Issued date: June 2011
Page No. 47 of 85
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
APPENDIX "A"
Manufacturer Experience to the Purchaser’s satisfaction
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Edition No.: 4
Issued date: June 2011
Page No. 48 of 85
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Manufacturer Experience
1.
The Manufacturer shall have at least 5 (five) years experience in manufacturing the offered
equipment.
2.
In case the Manufacturer does not have at least 5 (five) years experience in manufacturing the
offered equipment the Manufacturer shall have a Know-How agreement with a company which
has at least 5 (five) years experience in manufacturing the offered equipment, and both
companies shall have a Quality Management System (QMS) which meets the requirements of
ISO Standard 9001:2000.
3.
The experience described in paragraph 1 or 2, as applicable, shall be proven by a declaration
(including a customer list) certified by an attorney, or notary, as applicable, which shall be
submitted by the Manufacturer together with his offer to the Purchaser.
The customer list shall include type of equipment, name and telephone number of customer,
quantities and supplies dates.
The customer list shall reflect at least 3000 Distribution Network Power Transformers supplied
by Manufacturer or by Know-How Supplier.
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Edition No.: 4
Issued date: June 2011
Page No. 49 of 85
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
APPENDIX "B"
Type and special tests declaration
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Edition No.: 4
Issued date: June 2011
Page No. 50 of 85
Declaration
To be returned signed and stamped by Supplier
We hereby declare, that in case of award we will perform at our own expense and
responsibility, type and special tests as required in paragraph 7 of Specification NTS-104 and
submit to the Purchaser the reports, in English, of these type and special tests at least one
month before shipment of the ordered transformers.
Name of Supplier:
Signature and stamp of Supplier:
Date:
Tender No. _______________
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Edition No.: 4
Issued date: June 2011
Page No. 51 of 85
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
APPENDIX "C"
Declaration regarding the guaranteed losses
of the proposed transformers
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Edition No.: 4
Issued date: June 2011
Page No. 52 of 85
Declaration
To be returned signed and stamped by Supplier
We hereby declare, that in case of award the No-load and Load losses of the proposed transformers
will not exceed the values given in paragraph 4.10 of Specification NTS-104.
Name of Supplier:
Signature and stamp of Supplier:
Date:
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Edition No.: 4
Issued date: June 2011
Page No. 53 of 85
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
APPENDIX "D"
Know – How agreement to the Purchaser’s satisfaction
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Edition No.: 4
Issued date: June 2011
Page No. 54 of 85
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Know – How Agreement
Where a "know-how" agreement is required under the tender/inquiry documents, or under the
specifications, such "know-how" agreement must include the following commitments, or substantially
similar commitments, on part of the provider of the know-how:
1.
To transfer to the know-how recipient, all the technical documents and drawings, necessary for
the manufacturing, fabrication, testing, proper packing, operating and maintaining of the
proposed equipment;
2.
To adequately instruct and provide technical support to the know how recipient in the field of
manufacture/fabrication, design, quality control, testing and repair of the proposed equipment;
3.
To conduct an inspection of the manufacturing line of the know-how recipient and to approve its
adequacy to manufacture the proposed equipment up to the standards of the know-how provider;
4.
To participate in type tests of the proposed equipment (of the know how recipient's manufacture)
and to instruct/support the know-how recipient in undertaking corrective act/procedure, if
required or approved by the I.E.C;
5.
To provide technical support/instructions to the know-how recipient during the first two years
following the start of manufacturing by the know-how recipient.
The I.E.C waives any and all claims it may have against the know-how provider, for any conduct, act
or omission, on part of the know-how provider, or any of its employees, agents, or representatives,
directly or indirectly related to the transfer of know-how, the know-how agreement, or any action, or
omission thereunder.
This waiver of claims shall insure to the benefit of the know-how provider and to the benefit of any of
its employees, agents or representatives.
Nothing said herein shall release the know-how recipient from any duties or commitments, undertaken
by it, as part of its proposal to the I.E.C, or in connection with any failures or omissions to carry out
such duties, or commitments.
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Edition No.: 4
Issued date: June 2011
Page No. 55 of 85
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
APPENDIX "E"
SPECIFICATION no.50
FOR MINERAL INSULATING OIL
SUPPLIED WITH/WITHIN NEW ELECTRICAL EQUIPMENT
July 2009
Edition No.: 4
Issued date: June 2011
Page No. 56 of 85
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Edition No.: 4
Issued date: June 2011
Page No. 57 of 85
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Edition No.: 4
Issued date: June 2011
Page No. 58 of 85
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Edition No.: 4
Issued date: June 2011
Page No. 59 of 85
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Edition No.: 4
Issued date: June 2011
Page No. 60 of 85
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Edition No.: 4
Issued date: June 2011
Page No. 61 of 85
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Edition No.: 4
Issued date: June 2011
Page No. 62 of 85
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Edition No.: 4
Issued date: June 2011
Page No. 63 of 85
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
APPENDIX "F"
Declaration regarding fulfillment of
requirements of SI 5484 Israeli Standard
Edition No.: 4
Issued date: June 2011
Page No. 64 of 85
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Declaration
To be returned signed and stamped by Supplier
We hereby declare, that the proposed transformers shall fulfill the requirements of the SI 5484 Israeli
Standard (Distribution transformers – Requirements for the efficiency and labeling).
We hereby declare, that after notification of award, at the prototype approval stage, if we will be the
successful Bidder, we shall submit to the National Network Unit of I.E.C written approval issued by the
Standards Institution of Israel that, each awarded prototype meets the requirements of the published Israeli
Standard regarding energy efficiency and marking.
Name of Supplier:
Signature and stamp of Supplier:
Date:
Edition No.: 4
Issued date: June 2011
Page No. 65 of 85
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
APPENDIX "G"
Required schedule for prototype approval of
Hermetically Sealed
Distribution Network Power Transformers
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Specification NTS-103
For
Hermetically Sealed
Distribution Network Power Transformers
Edition No.: 4
Issued date: June 2011
Page No. 66 of 85
Required schedule for prototype approval of Hermetically Sealed Distribution Network Power Transformers
I.E.C. Inquiry no.
Weeks
STAGE
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
Starting date (*)
Submission of drawings and technical data for
the transformer and its accessories to I.E.C. for
approval
Drawings approval by I.E.C. including
clarifications.
Submission of date, laboratory name and plan for
type tests (for I.E.C approval)
Manufacture of the prototypes
Visual inspection of the prototypes
Routine tests performance
Type tests performance and submission of
preliminary type tests reports
Submission of the final type test reports for
approval
Submission of the approval of meeting the
requirements of the latest published official S.I
regarding energy efficiency and marking
Type tests report approval
Prototypes approval
Bidder name and title:
Bidder signature
(*)- the date on which contractual obligation has been created between the parties, as specified in the invitation to submit proposals in the Tender/RFP.
20
21
22
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Edition No.: 3
Issued date: February 2011
Page No. 67 of 85
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
APPENDIX "H"
QUALITY REQUIREMENTS
(SPECIFICATION Q - APP – 02, Rev 4)
Edition No.: 4
Issued date: June 2011
Page No. 74 of 87
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Specification NTS-104
Hermetically Sealed
Distribution Network Power Transformers
APPENDIX "I"
Routine Tests Results
on
Magnetic Media In Diskette Form
Israel Electric Corp. Ltd.
Information Systems and Communication Division
Dept. of Technical Information Systems
March 1999
Subject: Routine Tests on I.E.C. Distribution Transformers Method of forwarding results to I.E.C.
I
Preface
I.E.C. is required to computerize the results of the routine distribution transformer tests carried
out by the manufacturers. This will be facilitated by forwarding the results to I.E.C. in diskette
form, in accordance with the following format and conditions.
II
III
Packaging
A.
The packaging will be such as to prevent heat and mechanical damage to the diskettes.
B.
Two identical copies of the results will be sent (in order to guarantee the information).
Support documentation
Each diskette will be forwarded with a document containing the following information:
IV
A.
List of distribution transformers on the diskette (serial numbers).
B.
Total number of distribution transformers in the whole shipment.
C.
Total number of enclosed diskettes.
D.
Relevant details regarding the format of the data (ASCII/ANSI, Windows/Dos).
Diskettes
A.
The information will be forwarded to I.E.C. on 3.5” floppy diskettes
of 1.44 Mb capacity.
B.
The diskettes will be formatted by a procedure compatible with Microsoft’s
DOS/windows format procedure as follows:
Formatting command: FORMAT A:/F:1.44.
C.
Before sending, the diskettes will be tested and checked to guarantee them to be
virus-free.
D.
When sent, the diskettes will be write protected (by closing the write- protect switch
on the diskette).
V.
VI.
The Data
A.
The forwarded data will be in ASCII, 8 Bit (ANSI/ WINDOWS OR ASCII/ DOS)
format.
B.
The records will be built as follows:
(1)
The structure of the records must conform with the specifications below and
the specifications in the appendix.
(2)
There are 6 types of records. Records of type 1 to 4 will be placed at the
beginning of the file, followed by all records of type 5 and than all records of
type 6. Each record of type 5 and type 6 describe one transformer test (and
must be in correlating order).
(3)
The length of record type 5 is 309 characters.
(4)
The length of record type 6 is 274 characters.
(5)
All numeric fields should be aligned to the left.
(6)
All fields are mandatory, except the fourth and the fifth entry of the vector
“Voltage ratio and phase displacement check” and the field “Oil breakdown
withstanding voltage”, which may be left empty. Fields of “Voltage ratio
and phase displacement check” may contain negative values.
All these specifications must be respected and provided by each manufacturer required to
supply this product.
Yair Baron
Department Manager
Enc.:
Specification of format of records for Transformer routine Tests.
Specification of format of records for
Transformer Routine Tests
Rec.
Description
Num./
A-N
Field
Length Units
(Total/
Integer.
frac)
13
-
1.
(text/heading)
α/Ν
2.
Manufacturer
α/Ν
60
-
3.
(text/heading)
α/Ν
28
-
4.
(text/heading)
α/Ν
30
-
5.
Actual number
of transformers
in shipment
Ν
2
-
6.
(empty/insignif
icant record)
Three Phase
Transformer
-
-
-
α/Ν
60
-
α/Ν
10
Manufacture
date
10. Test Date
α/Ν
10
α/Ν
10
11. Customer’s
Spec. No.
12. Order no.
13. Serial no.
α/Ν
10
α/Ν
α/Ν
17
14. Type
15. Rated Power
α/Ν
N
25
4.0
7.
8.
Delivery date
9.
Format/ Options/
Comments
Must contain:
‘MANUFACTURER:’
Actual name of
manufacturer.
Must contain:
‘CUSTOMER:ISRAEL
ELECTRIC Co.’
Must contain:
‘TRANSFORMERS ON
THIS SHIPMENT:’
The maximum number
of transformers
may not exceed
20 !
Blanks
Oil immersed with
conservator
Oil immersed Sealed
Cast – Resin
Dd/mm/yyyy;
MANDATORY!
The Delivery date
should be the
latest date
between :
Manufacture date,
Test date.
Dd/mm/yyyy;
MANDATORY!
Dd/mm/yyyy;
MANDATORY!
15
AA/YY/XXXXXX/ZZZZ,
Where:
AA – Manufacturer
code,
YY – Year,
XXXXXX – Serial
No./
manufacturing,
ZZZZ - Sequence
number.
KVA
Rec.
Description
16. Frequency
17. Vector Group
18. Primary Rated
Voltage
19. Secondary Rated
Voltage
20. Primary Rated
Current
21. Secondary Rated
Current
22. Insulation
Class
23. Cooling
24. Short Circuit
Current
25. Short Circuit
Duration- Max
26. Total Weight
27. Oil Weight
28. Winding Resistances
29. Principle Tap
Voltage
30. At Temperature
31. Winding
Resistance A-B
32. Winding
Resistance B-C
33. Winding
Resistance C-A
34. Winding
Resistance a-b
35. Winding
Resistance b-c
36. Winding
Resistance c-a
37. Voltage Ratio
and Phase
Displacement
Check
38. Tap Voltage 1
39. Voltage Ratio
AB/an
40. Voltage Ratio
BC/bn
41. Voltage Ratio
CA/cn
42. Tap Voltage 2
43. Voltage Ratio
AB/an
44. Voltage Ratio
BC/bn
Num./
A-N
N
α/Ν
Ν
Field
Length Units
(Total/
Integer.
frac)
Hz
2.0
5
2.1
KV
Ν
3.0
V
Ν
2.2
A
Ν
4.2
A
α/Ν
1
α/Ν
N
4
1.3
KA
N
1.0
sec
N
N
1.3
3.0
t
Kg
Format/ Options/
Comments
Value: 50
DYn11
Allowed values:
12.6, 22, 33
(This is not a
field! This
describes the
following fields).
N
5.0
V
N
N
2.1
2.3
°C
Ohm
N
2.3
Ohm
N
2.3
Ohm
N
2.3
mOhm
N
2.3
mOhm
N
2.3
mOhm
(This is not a
field! This
describes the
following fields).
N
N
5.2
3.3
N
3.3
N
3.3
N
N
5.2
3.3
N
3.3
V
Negative value
allowed.
Negative value
allowed.
Negative value
allowed.
V
Negative value
allowed.
Negative value
allowed.
Rec.
Num./
A-N
Description
45. Voltage Ratio
CA/cn
46. Tap Voltage 3
47. Voltage Ratio
AB/an
48. Voltage Ratio
BC/bn
49. Voltage Ratio
CA/cn
50. Tap Voltage 4
51. Voltage Ratio
AB/an
52. Voltage Ratio
BC/bn
53. Voltage Ratio
CA/cn
54. Tap Voltage 5
55. Voltage Ratio
AB/an
56. Voltage Ratio
BC/bn
57. Voltage Ratio
CA/cn
58. Vector Group
59. Short Circuit
Impedance and
Load Loss
N
Field
Length Units
(Total/
Integer.
frac)
3.3
N
N
5.2
3.3
N
3.3
N
3.3
N
N
5.2
3.3
N
3.3
N
3.3
N
N
5.2
3.3
N
3.3
N
3.3
α/Ν
5
60. Tap
61. Mean
Temperature
62. VA-B
63. VB-C
64. VC-A
65. Average Voltage
66. IA-B
67. IB-C
68. IC-A
69. Average Current
70. Total Losses
71. Losses at
Temperature
According to
Standard
N
N
1.0
2.1
°C
N
N
N
N
N
N
N
N
N
3.2
3.2
3.2
3.2
2.3
2.3
2.3
2.3
5.1
V
V
V
V
A
A
A
A
W
72. Padd
N
4.0
W
N
5.1
W
N
5.1
W
RH .V.
73. I ²
I 2 RL.V.
74. Ptot
+
Format/ Options/
Comments
Negative value
allowed.
V
Negative value
allowed.
Negative value
allowed.
Negative value
allowed.
V
Negative value
allowed.
Negative value
allowed.
Negative value
allowed.
V
Negative value
allowed.
Negative value
allowed.
Negative value
allowed.
Dyn11
(This is not a
field! This
describes the
following fields).
(This is not a
field! This
describes the
following fields).
Oil Immersed at
75˚ C
Cast Resin at 120˚
C
Rec.
Description
Num./
A-N
75.
76.
77.
78.
Vz%
Vr%
Vx%
No Load Loss
and Current
N
N
N
79.
80.
81.
82.
83.
84.
85.
86.
87.
88.
Tap.
Va-b
Vb-c
Vc-a
Ia
Ib
Ic
Average Current
No Load Losses
Dielectric Test
Ν
N
N
N
N
N
N
N
N
Field
Length Units
(Total/
Integer.
frac)
1.2
1.2
1.2
%
%
%
(This is not a
field! This
describes the
following fields).
1.0
3.2
3.2
3.2
1.2
1.2
1.2
1.2
4.1
V
V
V
A
A
A
A
W
(This is not a
field! This
describes the
following fields).
2.0
89. Voltage
Frequency
N
90. H.V. Withstand
Voltage
91. Application
Duration
92. L.V. Withstand
Voltage.
93. Application
Duration
94. Induced Over Voltage
N
2.2
N
2.0
N
1.2
N
2.0
95. Applied Voltage
N
3.1
96. Frequency
N
3.0
K.V.
R.M.S
Hz
97. Duration
98. Oil Test
N
2.1
sec
99. Oil Type
100 Oil Breakdown
Withstand
Voltage
Format/ Options/
Comments
Hz
The value 50.
K.V.
R.M.S
sec
K.V.
R.M.S
sec
(This is not a
field! This
describes the
following fields).
Usually the value
125.
(This is not a
field! This
describes the
following fields).
α/Ν
N
20
2.1
K.V.
(may be left
empty)
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Edition No.: 4
Issued date: June 2011
Page No. 81 of 85
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
APPENDIX "J"
CRITERIA FOR FINAL COMPARISON OF BIDDERS OFFERS
(which have fulfilled all tender requirements)
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Edition No.: 4
Issued date: June 2011
Page No. 82 of 85
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Criteria for final comparison of Bidders offers (which have fulfilled all tender requirements)
for Hermetically Sealed Oil-Immersed Distribution Network Power Transformers
For selection of the offer which provides the maximum benefit to the Purchaser, the following benefits
(parameters) will be taken into account in the techno-economical comparison of Bidders offers:
Parameter
1. Experience in Utilities with at least 3000 Transformers of Supplier's Manufacture (10)
Largest number of transformers supplied - 10;
Smallest number of transformers supplied - 7;
Other - proportional
2. Number of taps of tap changer (10)
Number of taps according to requirements of the specification - 7;
Larger number of taps - 10
Weight
(in %)
10
10
3. Product Quality (shall be checked during sample inspection) (80)
3.1 Maintainability (40)
3.1.1 Low and High voltage windings
Combined – 7; Not combined – 10
3.1.2 Connections method
Welding and Pressing – 10; Welding - 8; Pressing – 7
3.1.3 Connections of the High voltage windings
Identical - 10; Not identical – 7
3.1.4 Sealing type of tank
Rubber – 10; Others – 7
3.2
Finish (10)
4.2.1 Paint Quality
Homogenous - 5; Not Homogenous – 3.5
4.2.2 Rust traces
No traces found – 5; Traces found– 3.5
3.3 Structure (30)
3.3.1 Circular/ Oval windings
Circular - 10; Oval - 7
3.3.2 Metal/Wood structure supporting active part
Metal - 10; Wood - 7
3.3.3 Circular/square High voltage wire
Circular - 10; Square - 7
Minimum grade of the technical evaluation of the proposal which fulfils I.E.C technical
requirements will be 70.
10
10
10
10
5
5
10
10
10
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Edition No.: 4
Issued date: June 2011
Page No. 83 of 85
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
APPENDIX "K"
SUMMARY OF PRICES
(to be filled separately for each proposed type of transformers)
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Edition No.: 4
Issued date: June 2011
Page No. 84 of 85
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
SUMMARY OF PRICES
(to be filled separately for each proposed type of transformers)
TRANSFORMER RATING
Name of Bidder: ________
______________________
Signature of Bidder:
______________________
Rated Primary Line to Line voltage: ___________ kV
Rated Power: ___________ kVA
Origin of Manufacturer
(Insert prices and data in this
column)
Non Israeli
NIS
Currency
1
PRICES
1.1 Firm price for one (1) transformer including oil with the above
mentioned rating, complete with all accessories
and appurtenances as specified in Specification NTS104.
The above mentioned firm price shall include the price
for the routine.
The price for the type and special tests shall not be
included in the above mentioned firm price and shall be
given separately in following paragraph 1.2.
1.2
Prices for the following type and special tests as
specified in clause 7.2 of this specification:
1.2.1
Lightning impulse test on line terminals
1.2.2
Temperature rise test
1.2.3
Short-circuit test (Special test)
1.2.4
Noise level test (on three transformers)
(Special test)
2. POWER LOSSES AND NO-LOAD CURRENT
2.1 No-load current ……………………………………..
2.2 No-load losses …………………………………....
%
Watts
2.3 Load losses (75º C) ………………………………. Watts
Israel Electric Corporation Ltd.
Marketing Division
National Network Unit
Specification NTS-104
For
Hermetically Sealed
Distribution Network Power Transformers
Edition No.: 4
Issued date: June 2011
Page No. 85 of 85
TRANSFORMER RATING
Rated Primary Line to Line voltage:
Rated Power:
kV
Name of Bidder:
_________________________
Signature of Bidder
kVA
_________________________
Origin of Manufacturer:
3
_________________________
(Insert prices and data in this
column)
Non Israeli
NIS
Currency
Prices for following spare parts according to quantities given
in paragraph 5.8 of this Specification:
3.1
One (1) High Voltage Coil ................................
3.2
One (1) Low Voltage Coil .................................
3.3
One (1) Tap-Changer ........................................
3.4
One (1) High Voltage Bushing .........................
3.5
One (1) Low Voltage Bushing ..........................
3.6
One (1) Stem of Low Voltage Bushing ............
3.7
One (1) Low Voltage Connection Clamp .........
3.8
One (1) Overpressure Relief Device .................
3.9
One (1) Oil Level Indicator ..............................
3.10 One (1) Emptying Tap of Transformer Tank ..
3.11 One (1) Transformer Tank ...............................
____________
Signature of Bidder
___________
Date of Bid