GOST R IEC 62004-2014

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  ГОСТ Р МЭК 62004-2014

GOST R IEC 62004−2014 Wire of heat-resistant aluminium alloy wire for overhead transmission lines

GOST R IEC 62004−2014

Group В74

NATIONAL STANDARD OF THE RUSSIAN FEDERATION

WIRE OF HEAT-RESISTANT ALUMINIUM ALLOY WIRE FOR OVERHEAD TRANSMISSION LINES

Thermal-resistant aluminium alloy wire for overhead line conductor

OKS 29.240.20*
GST 18 1130

_____________________

* ICS N 10 2015 GOST R IEC 62004−2014 is with ACS 17.220.20, 29.240.20,

here and further. — Note the manufacturer’s database.

Date of introduction 2016−01−01

Preface

1 PREPARED by Open joint stock company «all-Russian research, design and technological Institute of cable industry» (JSC «VNIIKP») on the basis of their own authentic translation into the Russian language of the international standard indicated in paragraph 4

2 SUBMITTED by the Technical Committee for standardization TC 46 «Cable products"

3 APPROVED AND put INTO EFFECT by the Federal Agency for technical regulation and Metrology dated September 18, 2014 N 1121-St

4 this standard is identical to international standard IEC 62004 (2007)* «Wire from heat-resistant aluminium alloy wire for overhead transmission lines» (IEC 62004:2007 «Thermal-resistant aluminium alloy wire for overhead line conductor»).
In applying this standard it is recommended to use instead of the referenced international standards corresponding national standards of the Russian Federation, details of which are given in Appendix YES

5 INTRODUCED FOR THE FIRST TIME

6 Some of the provisions of the international standard referred to in paragraph 4 may be subject of patent rights. The international electrotechnical Commission (IEC) is not responsible for identifying such patent rights


Application rules of this standard are established in GOST R 1.0−2012 (section 8). Information about the changes to this standard is published in the annual (as of January 1 of the current year) reference index «National standards» and the official text changes and amendments — in monthly information index «National standards». In case of revision (replacement) or cancellation of this standard a notification will be published in a future issue of information index «National standards». Relevant information, notification and lyrics are also posted in the information system of General use — on the official website of the Federal Agency for technical regulation and Metrology on the Internet (gost.ru)

1 Scope

This standard applies to the wire of heat-resistant aluminum alloy up to her twisting in the manufacture of stranded conductors for wires of overhead power lines. The standard specifies the requirements for mechanical and electrical properties, and heat resistance wires of commercially available diameters.

2 Normative references

This standard uses the regulatory references to the following international standards*:
_______________
* The table of conformity of national standards international see the link. — Note the manufacturer’s database.


IEC 60104 (1987) the alloy Wire aluminum-magnesium-silicon wire for overhead transmission lines (IEC 60104:1987, Aluminium-magnesium-silicon alloy wire for overhead line conductors)

IEC 60468 (1974) Method of measuring resistivity of metals (IEC 60468:1974, Method of measurement of resistivity of metallic materials)

IEC 60889 (1987) the hard aluminum Wire for conductors of overhead transmission lines (IEC 60889:1987, Hard-drawn aluminium wire for overhead line conductors)

3 Terms and definitions

This standard applies the following terms with respective definitions:

3.1 diameter (diameter) is the mean value of two measurements performed in two mutually perpendicular directions in each measured cross section.

Note — For non-circular wires is used equivalent diameter round wire with the same cross-sectional area.

3.2 type (type): Wire heat-resistant aluminum alloy, marked «AT1», «AT2», «AT3» and «AT4».

3.3 wire of heat-resistant aluminum alloy (thermal-resistant aluminium alloy wire): All types of wires of aluminum-zirconium alloy used at operating temperatures exceeding the temperature of use (or exploitation) of a conventional alloy wire from aluminium-magnesium-silicon (see IEC 60104) or aluminum wire hard-wire power lines (see IEC 60889) allowable operating temperature specified in table 1.

4 Marking

Wire corresponding to the present standard of the mean:

AT1 — wire heat-resistant aluminum alloy with a continuous maximum allowable temperature of 150 °C;

AT2 — wire heavy-duty heat-resistant aluminum alloy with a continuous maximum allowable temperature of 150 °C;

AT3 — wire of aluminum alloy with high thermal stability with a continuous maximum allowable temperature 210 °C;

AT4 — wire sverhtermicheskoy aluminum alloy with continuous maximum permissible temperature of 230 °C.

5 the values of the parameters of a wire of heat-resistant aluminum alloy

The values of the parameters are given in table 1, used for wire heat-resistant aluminum alloy in the calculations.


Table 1

Option	Values for
AT1	The AT2	AT3	AT4
Density at 20 °C, g/cm	2,703	2,703	2,703	2,703
Valid continuously operating temperature operating for 40 years, °C	150	150	210	230
The permissible operating temperature for 400 h, °C	180	180	240	310
The coefficient of linear expansion, °C	23 10	23 10	23 10	23 10
Temperature coefficient of resistance at constant mass, °C	0,0040	0,0036	0,0040	0,0038

6 Requirements

6.1 Material

The wire should be made of an aluminum-zirconium alloy and have a structure that would correspond to the mechanical, electrical properties and heat resistance of wire types AT1, AT2, AT3 and AT4.

6.2 defects

The surface of the wire should be smooth and have no cracks, roughness, grooves, foreign inclusions and other defects which adversely affect performance of the product.

6.3 Diameter and its allowable deviation

Nominal wire diameter should be expressed in millimeters, rounded to two decimal places. The allowable deviation associated with each measured value of the wire diameter shown in table 2.

To verify compliance with the diameter measured twice at mutually perpendicular directions of the cross section of the wire.


Table 2 — Diameter and its allowable deviation

Dimensions are in millimeters

Nominal diameter		Allowable deviation
-	To 3.00 cyl.	±0,03
SV. Of 3.00	-	±1%

6.4 rupture strength

The wire must meet the requirements specified in table 3. Ultimate tensile resistance of a single wire calculated by dividing the breaking load in the cross-sectional area. The cross section is determined by the measured diameter of the tested sample. For non-circular wire, profiled in front of the twisting, use the equivalent value of the diameter of the round wire of the same cross sectional area. Rupture strength must meet the requirements specified in table 3.


Table 3 — rupture strength and elongation after fracture of the wires (before twisting)

Type	Nominal diameter, mm		The minimum rupture strength, MPa	Minimum elongation, %
Over	Up to and including
AT1	-	2,60*	169	1,5
2,60	2,90	166	1,6
2,90	3,50	162	1,7
3,50	3,80	1,8
3,80	Of 4.00	159	1,9
Of 4.00	4,50*	2,0
The AT2	-	2,60*	248	1,5
2,60	2,90	245	1,6
2,90	3,50	241	1,7
3,50	3,80	1,8
3,80	Of 4.00	238	1,9
Of 4.00	4,50*	225	2,0
AT3	-	2,30*	176	1,5
2,30	2,60	169
2,60	2,90	166	1,6
2,90	3,50	162	1,7
3,50	3,80	1,8
3,80	Of 4.00	159	1,9
Of 4.00	4,50*	2,0
AT4	-	2,60*	169	1,5
2,60	2,90	165	1,6
2,90	3,50	162	1,7
3,50	3,80	1,8
3,80	Of 4.00	159	1,9
Of 4.00	4,50*	2,0
* For nominal pipe diameters less than 2.60 mm 4,50 mm or more requirements should be agreed between manufacturer and user.

6.5 Elongation

The measured value of elongation of wire after fracture shall be not less than the values shown in table 3.

6.6 electrical resistivity

Electrical resistivity at 20 °C should not exceed the values given in table 4.


Table 4 — electrical resistivity

Type	AT1	The AT2	AT3	AT4
Specific resistance at 20 °C, nom·m, not more	28,735	31,347	28,735	29,726
Conductivity in accordance with IACS, %	60,0	55,0	60,0	58,0
Note — IACS — the international standard for annealed copper (see IEC 60028).

6.7 temperature Resistance

Tensile strength, measured at room temperature after the heating wire at a certain duration and temperature specified in table 5 shall be not less than 90% of the value measured before heating.


Table 5 — Duration and temperature of heating to confirm the thermal stability of the

!- ness, h	Temperature, °C	AT1	The AT2	AT3	AT4
1	Heating temperature	230		280	400
The permissible temperature deviation	+5 -3			+10 -6
400	Heating temperature	180		240	310
The permissible temperature deviation	+10 -6

6.8 Length and its allowable deviation

The nominal length of wire on the reel or drum and the permissible variation in length shall be agreed between manufacturer and customer (consumer).

6.9 the Connection of wire

Connection wires can be performed before final drawing. The connection is carried out by electric butt welding, electric butt cold by resistance welding or cold pressure welding or other suitable welding methods. These compounds comply with good commercial practice. The connection can be made to ready the wire, provided that:

a) coil weight 500 kg or more;

b) coils of this type may be no more than one connection;

c) the connection can have no more than 10% of such coils;

d) at the request of the consumer, the manufacturer may confirm that the temporary connection resistance of the gap is not less than 130 MPa;

e) coil connections of the finished wire is properly marked.

6.10 Winding wire

The wire must not break during the winding of eight turns around a mandrel of diameter equal to the nominal diameter of the wire, at a speed of nabivanija not more than 60 Rev/min For non-round wire, profiled before stranding, the test is performed on a round wire to profiled.

6.11 Sampling

Samples for testing according to section 7 must be selected by the manufacturer from 10% of the individual lengths of wire that are members of the same party.

If you supply a batch of wires is large, the number of samples may be reduced by agreement between the customer (consumer) and the manufacturer, if the manufacturer guarantees that the condensed party meets previously specified requirements or exceeds them.

7 Test

7.1 the Venue of the test

If during the ordering between the manufacturer and the customer agree otherwise, all testing conducted at the factory.

7.2 Classification of tests

The following are the test requirements. Each sample prior to twisting must be tested according to these requirements.

7.2.1 type tests

Type tests for:

the resistance for 400 h;

— temperature resistance for 1 hour

performed once prior to delivery of the types of wires that meet the requirements of this standard to confirm performance meets the requirements of the customer (consumer). Routine tests performed on the wire, which passed acceptance tests in 7.2.2.

Routine tests shall be repeated with change (replacement) of a material or process that can lead to a change in performance.

7.2.2 Factory acceptance tests

If necessary, testing is carried out in the presence of a representative of the customer (consumer). Tests carried out on samples taken from finished wire, to confirm the conformity of the wires to the technical specifications on specific products.

Testing wires is carried out under:

a) appearance;

b) the value of the diameter;

c) the value of the temporary resistance to rupture;

d) the value of the elongation after rupture;

e) the value of specific electric resistance;

f) heat resistance for 1 h;

g) the strength of the winding.

The mismatch of the test sample to one of the standard requirements provides the basis for cancellation of the order. If the batch of products rejected, the manufacturer has the right to re-test only once for all the individual lengths of wire into the party and then re-submit them for acceptance.

7.2.3 acceptance testing

To check the quality and confirm the integrity on the finished wire, conduct the following compliance tests:

a) appearance;

b) the value of the diameter;

c) the value of the temporary resistance to rupture;

d) the value of the elongation after rupture;

e) the value of specific electric resistance;

f) heat resistance for 1 h;

g) the strength of the winding.

Samples for test shall be selected from 10% of the individual lengths of finished wire.

The mismatch of the test sample to one of the standard requirements provides the basis for cancellation of the order. If the consignment deemed unsuitable, the manufacturer has the right to re-test only once for all the individual lengths of wire into the party and then re-submit them for acceptance.

7.3 the Methods of testing

7.3.1 appearance

The surface of the wire must be smooth and must not have defects specified in the supply contract.

7.3.2 Diameter

The diameter of the sample is measured with a micrometer or similar instrument with a division accuracy of 0.005 mm Diameter measured twice at mutually perpendicular directions of the cross section of the wire.

7.3.3 rupture strength

Tensile strength of the sample is determined on the terminal device. The load is applied gradually. Speed breeding clips of the separating device should be from 25 to 100 mm/min.

In the calculation of the temporary rupture strength measured at breaking load, you should use the value of the diameter of the finished wire prior to the application of the load.

7.3.4 Lengthening

Tests to determine the elongation may be performed on the same samples and test for rupture strength, given in 7.3.3.

Ultimate elongation, measured without load, is determined in a test sample. Sample straighten manually, note the original estimated length of 250 mm and applied load as specified in test for rupture strength. After breakage of the wire ends of the specimen should be gently to combine and measure the distance between the marking.

Elongation is the increase in the length expressed as a percentage of the original estimated length.

If breakage occurs outside of the control marks, or within 25 mm from each mark and the required elongation is not obtained, conduct another test.

7.3.5 electrical resistivity

The test of electrical resistivity performed on samples according to IEC 60468, when the ambient temperature is not less than 10 °C and 30 °C. the Measured specific electrical resistance must be recalculated for a temperature of 20 °C according to the formula

, (1)

where T — temperature measurement,°C;

R — electrical resistance at a temperature T°C in Ohms;

R — electrical resistance at 20 °C, Ohm;

 — temperature coefficient of resistance constant weight at 20 °C.

Electrical resistivity at 20 °C determined on the basis of resistance at 20 °C by the method specified in IEC 60468.

7.3.6 temperature Resistance

From the length of wire selected two samples, one is placed in a suitable heating device and kept for a certain time at the temperature stated in table 5. Another sample kept at room temperature without heating. Then calculate the ratio of the strength at break of the wire after heating as before heating.

7.3.7 the Test winding

One segment from each sample, selected in accordance with 6.11, is subjected to the test winding. On the mandrel, the diameter of which is equal to the nominal diameter of the wire, at a speed of 60 rpm wound eight turns of wire. The wire should not break.

8 Acceptance and rejection

8.1 If the sample wire fails the test on any of the requirements of this standard, the party represented by this sample, is rejected.

8.2 If the party is rejected, the manufacturer has the right to conduct repeated tests on samples taken from coils, reels or bays with wire of the party, and those that will stand the test may be submitted for acceptance.

Annex a (informative). Temperature resistance

Appendix A
(reference)

A. 1 Temperature Resistance

The resistance of a wire of aluminum alloy means that the material is not annealed after heating and the temporary reduction of tear resistance is limited to a certain value, as described below. These phenomena can be experimentally described by the graph of Arrhenius, typical graphs of which several wires of aluminium alloy have been published. Properties the thermal stability of the aluminum wires typically used in transmission lines are determined by the resistance (duration of exposure temperature — axis x), is equivalent to heating above room temperature when the temporary tear resistance can be maintained at a level of at least 90% of the initial value after heating.

The term «temperature resistant» in this standard is expressed by the ability to withstand the required high temperature for 400 h, while maintaining at least 90% of the original temporary tear resistance at room temperature to heating.

A2 the Resistance for each aluminum wire

Figure A. 1 — Graph of Arrhenius (residual voltage 90%)

Figure A. 1 — Graph of Arrhenius (residual voltage 90%)

Figure A. 1 shows the resistance for each wire of aluminum alloy, the described typical graph of Arrhenius.

Each material that is part of the aluminum wire, can save at least 90% of the original temporary tear resistance when heated at a temperature and duration (either 1 or 400 or 350400 h) described by the graph of Arrhenius. In other words, the resistance of the wire after 400 h can be estimated over a shorter period of time by testing at a higher temperature, as temperature after 1 hour according to the schedule of Arrhenius. Similarly, if you extend the line to the lower temperature, we can assume the temperature at which the wire can save 90% of the original temporary tear resistance even after 40 years of use.

A. 3 Continuously influencing the operating temperature for each wire of heat-resistant aluminum alloy

Table 1 shows continuously influencing the operating temperature for each wire of heat-resistant aluminum alloy obtained from the graph of Arrhenius. In fact, the duration of continuous operation up to 36 years; however, for simplicity, in this standard it was decided to use the value 350400 h (about 40 years).

A. 4 heating Temperature to confirm the thermal stability of the

The combination of time and temperature specified in table 5, was chosen for:

a) testing in less time;

b) eliminating effect of treatment, i.e. the preservation of the thermal stability of the material without changing the properties of the metal at a higher temperature;

C) obtaining results with little scatter.

The permissible heating temperatures for 1 and 400 h for the allowable heating temperature for a period of 40 years was taken into account and shown in figure A. 1.

App YES (reference). Information about the compliance of the referenced international standards reference the national standards of the Russian Federation

App YES
(reference)

Table YES.1

Marking the reference international standard	The degree of compliance	Designation and name of the relevant national standard
IEC 60104 (1987)	-	*
IEC 60468 (1974)	-	*
IEC 60889 (1987)	-	*
* The corresponding national standard is missing. Prior to its adoption, it is recommended to use the translation into Russian language of this international standard. The translation of this international standard is JSC «VNIIKP».