TURKISH ELECTRICITY DISTRIBUTION CO.
MATERIAL MANAGEMENT DEPARTMENT
ANKARA-TURKEY
TECHNICAL SPECIFICATION FOR
METAL OXIDE SURGE ARRESTERS FOR MV SYSTEMS
CONSULTANT:
ELTEM-TEK
ELECTRICAL INSTALLATIONS
ENGINEERING SERVICES
AND TRADE CO.
MAY, 1996
FEBRUARY, 2005
TEDAŞ-MYD/96-019.A
TECHNICAL SPECIFICATION FOR
METAL OXIDE SURGE ARRESTERS
FOR MV SYSTEMS
CONTENTS
1. GENERAL
1.1. Scope
1.2. Standards
1.3. Definitions
1.4. Service Conditions
1.5. System Conditions
2. TECHNICAL CHARACTERISTICS
2.1. Electrical Characteristics
2.1.1. Minimum Values of Rated Voltage (Ur) and Continuous Operating Voltage (Uc)
2.1.2. Nominal Discharge Current (In)
: 5 kA
: 10 kA (Line Discharge Class: 1)
2.1.3. Residual Voltages (Maximum)
2.1.4. Rated Short Circuit Current (Is): 16 kA-rms
2.1.5. Partial Discharge: Maximum 10 pC at 1.05 Uc
2.2. Constructional Characteristics
2.2.1. General
2.2.2.1. Polymeric Housing
2.2.2.2. Ceramic Housing
2.3. Arrester Disconnector
2.4. Installation
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TEDAŞ-MYD/96-019.A
2.5. Line and Earth Connection Terminals
2.6. Nameplate
3. TESTS
3.1. Type Tests
NAME OF THE TEST
4. ACCEPTANCE TESTS AND PROVISIONS
4.1. Sampling
4.2. Acceptance Tests
4.3. Acceptance Criteria
4.4. General Provisions for Acceptance Tests
5. DOCUMENTS TO BE SUBMITTED WITH THE BID
6. MISCELLANEOUS CONDITIONS
6.1. Bid Prices
6.2. Packing
6.3. Documents to be Submitted With the Arresters
6.4. Inspections and Tests Other Than Acceptance Tests
6.5. Warranty
APPENDICES
APP-I
: DRAWINGS OF ARRESTER AND ACCESSORIES
APP-II
: BILL OF MATERIALS
APP-III
: SCHEDULE OF GUARANTEED CHARACTERISTICS
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TEDAŞ-MYD/96-019.A
TECHNICAL SPECIFICATION FOR
METAL OXIDE SURGE ARRESTERS
FOR MV SYSTEMS
1. GENERAL
1.1. Scope
This specification covers the technical characteristics and supply conditions of phase-to-ground
non-linear metal oxide resistor type surge arresters without spark gaps, with ceramic or polymeric
housings designed to limit voltage surges on MV systems of up to 36 kV.
Unless otherwise specified, surge arresters in the scope of this specification shall be supplied as
complete units together with all accessories specified in this specification. The types and
technical characteristics of surge arresters to be supplied are given in the Bill of Materials and/or
Schedule of Guaranteed Characteristics.
1.2. Standards
Unless otherwise specified, surge arresters specified in this specification shall be designed,
manufactured and tested in accordance with the latest editions of following Turkish Standards
(TS), International Electrotechnical Commission (IEC) standards, European Electrotechnical
Commission (CENELEC) standards.
Number of Standard (TSE)
Number of Standard
Name of Standard
(IEC, CENELEC)
TS EN 60099-4-1997
IEC 60099-4:2004-05
Surge Arresters, Part 4:
Metal Oxide Surge Arresters Without
Spark Gaps (for A.C. Sytems)
Equivalent or superior standards may be acceptable. In this case the Bidder shall submit Turkish
or English copies of applied standards with his bid.
1.3. Definitions
Some of the definitions below are taken from IEC 60099-4 Standard.
Metal Oxide Surge Arrester Without Gaps: Arrester having non linear metal-oxide resistors
connected in series and/or parallel without any integrated series and parallel spark gaps.
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TEDAŞ-MYD/96-019.A
Non-Linear Metal-Oxide Resistor: part of the surge arrester which, by its non-linear voltage
versus current characteristics, acts as a Iow resistance to overvoltages, thus limiting the voltage
across the arrester terminals, and as high resistance at normal power-frequency voltage.
Rates Voltage of an Arrester (Ur): Maximum permissible r.m.s. value of power-frequency
voltage between its terminals at which it is designed to operate under temporary overvoltage
conditions.
Continuous Operating Voltage of an Arrester (Uc): Designated permissible r.m.s. value of
power-frequency voltage that may be applied continuously between arresters terminals.
Nominal Discharge Current of an Arrester (In): Peak value of lightning current impulse which is
used to classify an arrester.
Continuous Current of an Arrester: Current flowing through the arrester when energized at the
continuous operating voltage (Uc).
Reference Current of an Arrester: Peak value of the resistive component of a power-frequency
current used to determine the reference voltage of the arrester. The reference current is to be
specified by the Manufacturer.
Reference Voltage of an Arrester (Uref): Peak value of power-frequency voltage divided by √2
which is applied to the arrester to obtain the reference current.
Residual Voltage of an Arrester (Ures): Peak value of voltage that appears between the
terminals of an arrester during the passage of discharge current (Discharge voltage).
Power Frequency Withstand Voltage Versus Time Characteristic of an Arrester: Power
frequency withstand voltage versus time characteristic shows the maximum time durations for
which corresponding power-frequency voltages may be applied to the arresters without causing
damage or thermal instability, under specified conditions. The conditions relating to this
characteristic are specified in IEC 60099-4, Clause 6.10.
1.4. Service Conditions
Surge arresters shall be suitable for use under the service conditions specified below.
Installation Place
Outdoor
Altitude
Up to 1000 m
Ambient temperature
- maximum
- minimum
+ 40 0C
- 40 0C
Wind speed
Less than 34 m/s
Maximum solar radiation
Less than 1.1 kW/m2
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TEDAŞ-MYD/96-019.A
Atmospheric pollution
Level III (Heavily polluted)
Type of installation
Vertical
Special Service Conditions listed below shall be valid if they are specified in the Bill of Materials.
Altitude *
- Up to 2000 m
- Up to 3000 m
Ambient temperature *
0
- Maximum
- Minimum
Above + 40 C
Below - 400C
Atmospheric pollution
Level IV (Very heavily polluted)
* Shall be specified by the PURCHASER in the Bill of Materials.
1.5. System Conditions
Frequency
(H2)
50
Nominal system voltage
(kV)
6.3
10.5
15.8
34.5
Highest system voltage
(kV)
7.2
12
17.5
36
Lightning impulse withstand voltage of
equipment to be protected
(kV-peak)
60
75
95
System earthing *
- Solidly earthed neutral system
- Resistance-earthed neutral system
170
Duration of clearance of phase to ground < 3 s
faults
* Shall be specified by the PURCHASER in the Bill of Materials.
2. TECHNICAL CHARACTERISTICS
2.1. Electrical Characteristics
The surge arresters under the scope of this specification shall have the following characteristics.
2.1.1. Minimum Values of Rated Voltage (Ur) and Continuous Operating Voltage (Uc)
Highest System
Voltage (kV)
7.2
12
17.5
Directly Earthed Neutral System
Ur (kV)
Uc (kV)
6
5
10
8
15
12
3
Resistance-Earthed Neutral
System
Ur (kV)
Uc (kV)
7
6
12
10
18
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TEDAŞ-MYD/96-019.A
36
30
24
2.1.2. Nominal Discharge Current (In)
36
29
: 5 kA
: 10 kA (Line Discharge Class: 1)
Nominal discharge current shall be specified by the PURCHASER in the Bill of Materials.
2.1.3. Residual Voltages (Maximum)
- For arresters with nominal discharge current (In) of 5000 A.:
Rated Voltage (Ur)
(kV-r.m.s.)
3 – 29
Steep Current Impulse
Residual Voltage
(kV-peak/Ur)
2.7 – 4.0
Lightning Impulse Residual
Voltage
(kV-peak/Ur)
2.4 – 3.6
30 – 132
2.7 – 3.7
2.4 – 3.6
- For arresters with nominal discharge current (In) of 10.000 A:
Rated Voltage (Ur)
(kV-r.m.s.)
3 – 29
Steep Current Impulse
Residual Voltage
(kV-peak/Ur)
2.6 – 4.0
Lightning Impulse
Residual Voltage
(kV-peak/Ur)
2.3 – 3.6
Switching Impulse
Residual Voltage
(kV-peak/Ur)
2.0 – 2.9
30-132
2.6 – 3.7
2.3 – 3.3
2.0 – 2.6
NOTE: The values on the table above are taken from IEC 60099-4: 2004, Annex-J.
2.1.4. Rated Short Circuit Current (Is): 16 kA-rms
2.1.5. Partial Discharge: Maximum 10 pC at 1.05 Uc
2.2. Constructional Characteristics
2.2.1. General
All materials to be used for the construction of surge arresters shall be selected as the best
available for the purpose for which they will be used considering strength, durability and other
physical and electrical properties. They shall be new and first class quality and free from defects
and imperfections.
Necessary precautions shall be taken to protect the active parts of surge arresters against
humidity moisture, and pollution.
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TEDAŞ-MYD/96-019.A
2.2.2. Housing
The insulator housings of surge arresters shall be made of either ceramic or silicon rubber
material as specified in the Bill of Materials.
The insulator housing shall be manufactured so as to withstand the torsional forces and other
forces caused by short circuits, earthquakes and other vibrations and atmospheric conditions
both in normal service conditions and in case of overvoltages arising in the system.
All metal parts of the insulator housing exposed to the atmosphere shall be made of hot-dip
galvanized steel or of non-corroding metals. All metallic parts shall be bonded to the housing so
that no fracture or loosening shall occur by forces resulting from mechanical stresses and
temperature changes. The bonding material shall be of high quality and shall not include any
agent causing chemical reaction with metal parts and shall not break due to expansions.
Unless otherwise specified in the Bill of Materials, the minimum specific creepage distance of the
housing (phase-to-earth) shall be 25 mm/kV, and the phase-to-phase value of highest system
voltage shall be used in the calculation.
2.2.2.1. Silicon Rubber Housing
The silicon rubber housing shall be self extinguishing, void free and hydrophobic.
2.2.2.2. Ceramic Housing
Ceramic housings shall be high grade and shall have a homogeneous construction, and all
exposed surfaces shall be glazed smoothly in brown color. The housing shall be free from any
harmful substances, cracks, flaws, burrs, specks or other imperfections.
The housing and the glaze shall be manufactured so that they shall withstand sudden
temperature variations, industrial pollution, ozone, acids, alkalis, salts, dust and other
atmospheric effects.
2.3. Arrester Disconnector
Unless otherwise specified in the Bill of the Materials, surge arresters shall be equipped with
arrester disconnectors at their earth leads, for disconnecting the arresters from the system in the
event of arrester failure, and the failed arrester shall be clearly visible from the ground level.
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TEDAŞ-MYD/96-019.A
Operation Time / Current Curves relating to the time delay for operation of arrester disconnector
shall given with the Bid.
2.4. Installation
Surge arresters shall be connected between phase conductors and earth, and shall be mounted
vertically using Mounting Consoles1 or Mounting Clamps.
Mounting Consoles or Mounting Clamps and the required hardware (bolts, nuts and washers)
shall be supplied with arresters.
Mounting accessories shall either be made of hot-dip galvanized steel or non-corroding metals
resistant to mechanical stresses.
Unless otherwise specified in the Bill of Materials, the Earth Connection Conductor of the arrester
that is used for connecting the earth terminal of the arrester to the ground conductors of the
system shall be supplied with arresters. The Earth Connection Conductor shall have a diameter of
25 mm2 and a length of 350mm, and shall be made of tin-coated braided copper. The principal
drawing showing the connection of earth connection conductor and the arrester disconnector with
the arrester is given in appendix.
2.5. Line and Earth Connection Terminals
Unless otherwise specified in the Bill of Materials;
- Surge Arresters With Silicon Rubber Housing: Terminals shall be threaded and shall be of 10
and 12 mm diameter and 30-50 mm length. Washers and nuts shall be connected on the
terminals.
- Surge Arresters With Ceramic Housing:
Line terminals shall be clamp type suitable for accommodating 25-90 mm2 stranded conductors,
fastened with bolts. Earth terminals shall be suitable for connection of conductors with lugs.
Terminal materials, bolts, nuts, washers etc. shall be made of stainless steel.
2.6. Nameplate
Each arrester shall be provided with a nameplate of stainless steel or other approved noncorroding metal firmly attached to the arrester, or information to be included on the nameplate
1
In case that the Connection Console is made of an insulating material, it shall be suitable to outdoor
service conditions of the arrester and shall have fire resistance class of at least V-O. One minute powerfrequency withstand voltage of the Connection Console shall be at least Um/√3.
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TEDAŞ-MYD/96-019.A
shall be written on the metal cap or cover of the arrester. Lettering on the nameplate or arrester
will not deteriorate with time.
Surge arresters shall be identified at least by the following information which shall appear on the
nameplate.
-
Manufacturer’s name or trade mark, type of arrester
Year of the manufacture
Rated voltage (Ur)
Continuous operating voltage (Uc)
Nominal discharge current (In)
Rated short-circuit withstand current (Is)
2.7. Anticorrosion Precautions
The metallic parts of lightning arresters shall be made of corrosion resistant materials shall be
protected against corrosion.
Non current-carrying ferrous parts shall be hot dip galvanized for protection against corrosion.
Galvanizing and tests on galvanized surfaces shall be made in accordance with TS 914
“Galvanizing (Hot Dip Zinc Coating)”.
3. TESTS
Unless otherwise specified, the tests shall be performed according to IEC 60099-4: 2004 or the
latest edition thereof.
3.1. Type Tests
Type tests shall be applied on complete surge arresters or arrester sections. When tests are
made on sections it is necessary that the sections represent the behaviour of the complete
arrester within the manufacturer’s tolerances with respect to a specific test.
Tests applicable to arresters with ceramic housing or silicone rubber housing are given in the
table below.
EXPLANATION
In:10.000 A.
In: 5000 A
- power frequency voltage test
X
X
- lightning impulse voltage test
X
X
NAME OF THE TEST
1
2
Insulation withstand tests on the arrester housing
Residual voltage test
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TEDAŞ-MYD/96-019.A
- steep current impulse residual voltage test
X
X
- lightning impulse residual voltage test
X
X
- switching impulse residual voltage test
X
-
3
Long Duration Current Withstand Test
X
X
4
Operating-duty Tests
- high current impulse operating duty test
X
X
5
Verification of power frequency voltage versus
time characteristics of the arrester
X
X
6
Short Circuit Tests
- high current test at rated short circuit current
X
X
- high current test at reduced short circuit current
X
X
- low current test at short-time (1 s) short circuit
current
X
X
7
Tests of Arrester Disconnectors
X
X
8
Partial Discharge Tests
X
X
9
Environmental Tests
- Temperature cycling tests (only applicable to
arresters with ceramic housings)
- Sulphur di-oxide tests
- Salt mist tests
10
They shall be applied on all
arresters. Gasket systems and
metallic parts of arresters shall be
tested whether they are affected
from environmental conditions or
not.
Shall be applied on arresters with
gas compartments.
Verification of Seal Leak Rate
X : The test shall be applied.
- : The test shall not be applied.
- Additional tests to be performed on arresters with silicone rubber housings.
S.TD.1
- Moisture ingress test
Thermomechanical test
Water immersion test
S.TD.2
Weather ageing test
Test Series A (1000 hours test)
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TEDAŞ-MYD/96-019.A
3.2. Routine Tests
At least the following routine tests shall be applied by the Manufacturer on all surge arresters in
the scope of this specification.
- Measurement of reference voltage (Uref)
- Lightning impulse residual voltage test
- Partial discharge test
- Leakage check (test method shall be determined by the Manufacturer).
4. ACCEPTANCE TESTS AND PROVISIONS
4.1. Sampling
Arresters with the same class and type presented to inspections and tests on each delivery shall
be considered as a party.
The
samples
for
these
tests
shall
be
selected
at
random
by
the
Purchaser’s
representative/representatives and unless otherwise specified, the number of samples to be
selected for each item shall be the nearest whole number to the cube root of the number of
arresters in the party.
4.2. Acceptance Tests
-
Type tests specified in the Contract:
These tests shall be made on appropriate number of samples according to the requirements
of the test.
-
Measurement of power frequency voltage (Uref) on the complete arrester at reference current,
-
Lightning impulse residual voltage test2,
-
Partial discharge test,
-
Seal Leak test of housing,
2
This test shall be made on complete arresters beginning from the date 01.01.2006. Until this date, it may
be measured at any current of 0.01 to 2 times the nominal discharge current to be determined by the
Manufacturer. In this case, the test current and the voltage to be measured shall be indicated by the
manufacturer.
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TEDAŞ-MYD/96-019.A
Test shall be made as follows.
i.
Reference voltages (Uref) of sample arresters are measured at reference current.
ii.
Arresters with reference voltages having been measured are submerged in a tank filled with
water of 1 meter depth for 4 hours. Temperature of the water in the tank shall be 35 ±. 5 °C.
iii.
Outer surfaces of the arresters which taken from the tank filled with water are dried with a
piece of doth.
iv.
Reference voltages of dried arresters are measured and compared with the initially
measured values. The test is considered unsuccessful, if the measured values vary more
than %5 of the initial values.
-
Verification of housing of arresters with silicone rubber housing to determine whether they are
silicone or not. (This test shall be carried out as an acceptance test in case the number of
arresters ordered is 100 and more.
The test shall be performed using Infrared Fourier Transform (FTIR) method or another similar
method, on a sample arrester to be selected in the scope of delivery.
- If it is specified to the Contract;
•
Special Thermal Stability test.
•
Verification of operating time versus current characteristics of arrester disconnector. The
test shall be made on 3 (three) samples to be selected out of the arresters in the scope of
the delivery. If the test results are positive, new disconnectors shall be given free of
charge to the PURCHASER for the disconnectors used in the test.
4.3. Acceptance Criteria
i.
All type tests shall have positive results. The negative result of a type test, if considered by
the Purchaser, essential for reliable operation of surge arresters, may involve rejection of all
units of the same type of the supply. The Purchaser, at its unobjectional judgement, may
accept the repetition of the test, if the Supplier proposes to modify, within a reasonable
period
of
time,
the
design
of
the
surge
arresters
and
to
repeat
at
the
Manufacturer’s/Contractor’s expense, all the type tests specified in the Specification.
ii.
Measuring of Power-Frequency Voltage (Uref), Lightning Impulse Residual Voltage Test,
Partial Discharge Test, Verification Of Seal Leak Rate Tests shall have positive results.
Should the result of any test become negative, this test/tests shall be made on all arresters
constituting the party and the arresters with negative test results shall be rejected.
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TEDAŞ-MYD/96-019.A
iii.
Each test on each arrester disconnector selected shall have a positive result. If the result of
any test on any sample become negative, it shall be concluded that the arrester
disconnectors in the scope of delivery are non-conforming and the arrester disconnectors in
the scope of delivery shall be replaced by appropriate disconnectors. No extension of time
shall be given to the Supplier for these transactions.
iv.
If the result of Special Thermal Stability Test becomes negative, all arresters in the scope of
delivery shall be rejected, without considering the results of other tests.
v.
If the result of first measurement on verification of housing of arrester to determine whether
it is silicone or not becomes negative, than the test shall be repeated on a second sample
taken from the same arrester. If the negative test result is repeated, all arresters in the
scope of delivery shall be rejected, without considering the results of other tests.
4.4. General Provisions for Acceptance Tests
i.
The Supplier shall submit to the Purchaser the test and inspection program containing
information such as the names, location and commencement of tests, after signing the
Contract. The Supplier shall notify the Purchaser at least 20 (twenty) days in advance of the
active date of the beginning of the tests to be performed abroad, and 7 (seven) days in
advance for the tests to be performed in Turkey.
ii.
The type tests shall be carried out with the attendance of the Purchaser’s representatives.
Unless otherwise specified in the Contract, it is essential that the acceptance tests are
performed at the Manufacturer’s premises. The tests in the scope of acceptance tests,
however that cannot be made in the Manufacturer’s premises, may be performed at another
place acceptable to the Purchaser. Application relating to the type tests shall be in
accordance with Clause 4.4.iii.
iii.
Type tests may be carried out in an accredited laboratory or in another non-accredited
laboratory with the attendance of Purchaser’s representatives. Other acceptance tests shall
not be started unless the positive test reports of type tests are submitted to the Purchaser.
Purchaser’s representatives may not attend the tests if they are performed in an accredited
laboratory.
iv.
The Purchaser may not wish to be represented at the tests by notifying the Supplier in due
time. In this case, the Supplier together with the Manufacturer, shall proceed with the tests
and submit the test results to the Purchaser. The test reports thus prepared and signed by
the Supplier and the Manufacturer shall be sent to the Purchaser in 2 copies for check and
approval. If the test reports are approved, the Purchaser shall issue a Release Note for
shipment and return 1 approved copy of the Test Report to the Supplier.
v.
Excluding the reasons arising from the Purchaser (such as not being able to be present on
the indicated date, not being able to reach a decision on the test results, etc.), no extension
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TEDAŞ-MYD/96-019.A
of time shall be given to the Supplier for possible delays in the delivery due to not being
able to complete the acceptance tests.
vi.
No payment shall be made to the Supplier before the conclusion of acceptance tests.
vii.
The test reports shall be so arranged that the characteristics of samples tested and the
compliance or non-compliance of the test results shall be clearly stated, and then
countersigned. In case of positive results of tests, and that other stipulations stated in the
Contract are appropriate, a release note for the relevant party of goods shall be given by
the Purchaser’s representative(s).
If the Purchaser’s representative(s) cannot decide about the test results, they may leave the
decision to the General Management of TEDAŞ.
5. DOCUMENTS TO BE SUBMITTED WITH THE BID
-
Schedule of Guaranteed Characteristics; shall be filled in and signed by the Bidder and the
Manufacturer for each item of surge arresters. Information given in these schedules will be
binding for the Bidder and the Manufacturer.
-
Type test reports or certificates;
Bidders are required to submit with their Bids reports or certificates of type tests performed in
an accredited laboratory on the surge arresters offered type.
Test reports that have been performed with the attendance of Purchaser’s or TSE’s
representatives shall also be accepted. Test reports must belong to the type offered.
Therefore, the Purchaser may request from the Bidder to prove that the test reports belong to
the type offered.
Type test reports shall bear the name of the laboratory where the tests are conducted,
names, titles and signatures of the persons performing the tests and of the observers and the
date of the performance of tests.
If the manufacturing is made under a licence, the type test report must belong to the arrester
produced in the factory in which the manufacturing is made.
The Purchaser reserves the right to determine to its satisfaction to evaluate the bids of the
Bidders who did not submit appropriate or any type test reports, provided that the type tests
to be carried out in Turkey shall be carried out on a sample unit to be selected out of the first
delivery lot, and the type tests to be carried out abroad shall be carried out before the first lot
is delivered, at the Supplier’s cost.
-
Following information, documents and drawings;
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TEDAŞ-MYD/96-019.A
In addition to the items stated above, Bidders are required to submit with their bids following
information, documents and drawings.
-
Detailed catalogues,
Voltage/current curve of arrester,
Power frequency voltage/time curve,
Residual voltage versus discharge current curve at lightning current impulse,
Operating Time/Current curve for arrester disconnectors,
Cross section of surge arresters, (details of Pressure Relief System shall be given on the
cross section drawings for arresters with Pressure Relief System),
-
Drawings with overall dimensions and weight of arrester including all accessories necessary
for installation,
-
Information related to arrester disconnector,
T.S.E. certificate,
ISO 9001:2000 Quality System Certificate of Manufacturer
Methods of packing and transport dimensions and weight.
The Bidder’s failure to submit any of the documents required herein or any missing data may
entitle the Purchaser to reject the bid.
6. MISCELLANEOUS CONDITIONS
6.1. Bid Prices
Bid Prices shall be given according to the Bidding Specifications. The bid unit prices shall include
the prices of;
-
The complete surge arresters including the accessories specified in the Bill of Materials
-
Acceptance tests
-
Packing.
6.2. Packing
Surge arresters shall be delivered with packing.
Surge arresters shall be so packed that they shall withstand all loading, transportation and
unloading operations, and in a way to ensure their arrival to the Purchaser’s warehouse without
being damaged.
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TEDAŞ-MYD/96-019.A
The Bidder shall state in his Bid, the method of packing, number of arresters, overall dimensions
of packing and transport weight.
Following information shall be written on each packing with letters and numerals of appropriate
size.
-
Manufacturer’s name and/or trade mark,
-
Purchaser’s name and address,
-
Purchaser’s order number,
-
Purchaser’s material code number,
-
Type of arrester,
-
Rated voltage (Ur),
-
Rated discharge current (In),
-
Total gross weight.
6.3. Documents to be Submitted With the Arresters
The followings shall be given with the arresters.
-
Routine Test Reports,
-
Installation instructions,
-
Warranty Certificate issued by the Manufacturer.
6.4. Inspections and Tests Other Than Acceptance Tests
i.
The Purchaser’s right to inspect, test and where necessary, reject the Goods after the Goods
arrival in the final destination shall in no way be limited or waived by reason of the Good’s
having previously been inspected, tested and passed by the Purchaser’s representative(s).
ii.
The PURCHASER, at its unobjectionable judgement, may decide on the total or partial
repetition of the type or routine tests at the Manufacturer’s premises or in an accredited
laboratory in Turkey or abroad within the period of the contract.
The sample/samples shall be selected by the Purchaser’s representative(s) and
countersealed. If the test results prove positive, all expenses shall be paid by the Purchaser.
In case the tests results prove negative, all test expenses shall be paid by the Contractor.
The Purchaser, at its unobjectionable judgement, may decide on the replacement of
equipment, with the proper ones, being their relevant type and acceptance tests performed,
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TEDAŞ-MYD/96-019.A
within a reasonable time and with all kind of expenses borne by the Supplier, or on the
cancellation of the contract unilaterally.
6.5. Warranty
The Supplier shall warrant that each surge arrester of the supply shall have no defects arising
from design, materials and workmanship, for a period of 24 (twenty-four) months after the date of
delivery.
Should the surge arresters have defects or become defective due to design, materials and
workmanship within the warranty period, they shall be replaced by new ones. Transportation of
new arresters to the place to be notified by the Purchaser and the installation thereof, if
necessary, shall be performed by the Contractor/Manufacturer without claiming any expense.
The Contractor/Manufacturer shall re-manufacture and shall make ready the arresters for
acceptance within 1 (one) month of the date of the written notice, and shall deliver the arresters
to the destination to be indicated by the Purchaser within 15 days of the date of the completion of
the tests. If the Contractor/Manufacturer fails to comply with such delivery terms, or, if the
Contractor/Manufacturer, having been notified, fails to remedy the defects, the Purchaser shall
proceed to take such remedial action as may be necessary, at the Contractor’s expense. In this
case the Purchaser shall collect the costs and expenses from the earnings (if any) or
performance security of the Contractor.
The repaired or replaced equipment shall be covered by the same warranty stipulations.
It shall be warranted by the Manufacturer that the insulation and hydrophobic characteristics of
housings of Surge Arresters with Silicone Rubber Housing shall not deteriorate for a period of 5
years (under the service conditions of arresters).
15
TEDAŞ-MYD/96-019.A
APPENDICES
APP.I : DRAWINGS OF ARRESTERS AND ACCESSORIES
APP.II: BILL OF MATERIALS
APP.III: SCHEDULE OF GUARANTEED CHARACTERISTICS
16
TEDAŞ-MYD/96-019.A
17
TEDAŞ-MYD/96-019.A
BILL OF MATERIALS FOR
METAL OXIDE SURGE ARRESTERS
FOR MV SYSTEMS
File No: ...................
ITEM NO
1
1. Max. continuous system voltage
(kV-rms) :
2. Rated voltage of arrester, Ur
(kV-rms) :
3. Continuous operating voltage of arester,
Uc
(kV-rms) :
4. Nominal discharge current
(kA) :
5. System earthing
- Directly earthed neutral system
:
- Resistance earthed neutral system
:
6. Type of housing
- Silicone
:
- Ceramic
:
7. Arrester disconnector (yes/no)
:
8. Earth connection conductor (yes/no)
:
9. Altitude
(m) :
10. Ambient temperature
- max.
:
- min.
:
11. Purchaser’s material code no
:
12. Quantity
(ea.) :
18
2
3
TEDAŞ-MYD/96-019.A
SCHEDULE OF GUARANTEED CHARACTERISTICS
FOR
METAL OXIDE SURGE ARRESTERS FOR MV SYSTEMS
Order No: .......................................
Item No : .......................................
Purchaser’s Material Code No: ........................
Guaranteed
1. Manufacturer
:
2. Manufacturer’s Type Designation
:
3. Applicable Standards
:
4. Highest system voltage
(kV-rms) :
5. Rated voltage of the arrester, Ur
(kV-rms) :
6. Max. continuous operating voltage of the arrester
Uc
(kV-rms) :
7. Rated frequency
(Hz) :
8. Rated discharge current
(kA) :
9. Metal Oxide Resistor
:
(shall be filled in for 1 metal oxide resistor)
- Manufacturer’s name and origin
:
- Rated voltage (Ur)
(kV-rms) :
- Operating voltage (Uc)
(kV-rms) :
- Diameter
(mm) :
- Height
(mm) :
10. Number of metal oxide resistors on the complete
surge arrester
11. Type of the housing (ceramic/silicone)
(e.a.) :
:
12. Reference values;
- Reference current (Iref)
(A) :
- Reference voltage (Uref)
(kV) :
- Ambient temperature
(°C) :
19
TEDAŞ-MYD/96-019.A
Order No: .......................................
Item No : .......................................
Purchaser’s Material Code No: ........................
Guaranteed
13. Continuous current of arrester at continuous
operating voltage;
- Resistive component
(mA) :
- Capacitive component
(mA) :
- Ambient temperature
(°C) :
14. Steep current impulse residual voltage (1/20 µs)
- Peak value of current impulse
(kV-peak) :
- Highest residual voltage
(kV-peak) :
15. Lightning impulse residual voltage (8/20 µs)
Highest residual voltages
- 0.5 times the rated discharge current
(kV- peak) :
- 1 times the rated discharge current
(kV- peak) :
- 2 times the rated discharge current
(kV- peak) :
16. Switching impulse residual voltage
(10000 A, line discharge class: 1)
- At 125 A peak-current
(kV- peak) :
- At 500 A peak-current
(kV- peak) :
17. Resistive Losses
- power loss ratio determined by accelerated
ageing procedure, Kct
- losses of
temperature
new
resistors
at
:
ambient
. at the rated voltage, P1R (W)
:
. at the continuous operating voltage, P1C
18. Heat dissipation capacity
(W) :
(kJ/kV) :
19. Dielectric strength of arrester housing
- one-minute power frequency withstand
voltage, wet
(kV-rms) :
- 1.2/50 µs lightning impulse withstand voltage
20
(kV-peak) :
Rated discharge
current)
TEDAŞ-MYD/96-019.A
Order No: .......................................
Item No : .......................................
Purchaser’s Material Code No: ........................
Guaranteed
20. Minimum creepage distance
(mm) :
21. Pressure relief system (Yes/No)
:
22. Gas filled compartment (Yes/No)
:
23. Cantilever strength (Nm)
:
24. Type of material of insulating installation console
:
25. Height of complete surge arrester
weight
26. Net
console/clamp)
(excluding
the
(mm) :
installation
21
(kg) :