IEC 60464 2 Edition 2 1 2014 05 CONSOLIDATED VERSION VERSION CONSOLIDÉE Varnishes used for electrical insulation – Part 2 Methods of test Vernis utilisés pour l''''isolation électrique – Partie 2 Méthode[.]
Flashpoint
For flashpoint temperatures of 79 °C and above, the method given in ISO 2592 shall be used
For flashpoint temperatures under 79 °C, the procedure outlined in ISO 1523 must be utilized with any closed-cup apparatus specified in annex A of the standard It is essential to read ISO 1523 in conjunction with ISO 3679.
Two measurements shall be made on two separate samples and the two results of flashpoint shall be reported.
Density
The method given in ISO 2811 shall be used Two measurements shall be made and the two results of density shall be reported.
Viscosity
The viscosity shall be determined with a suitable device at (23 ± 0,5) °C If a rotating type of device is used, it shall be in accordance with ISO 2555 (Brookfield type) or with ISO 3219
(a type working at defined shear rate) If an efflux type of equipment is used, the method of test and the flow cup shall be in accordance with ISO 2431
Two measurements shall be made and the two results of viscosity shall be reported.
Content of non-volatile matter
The method given in ISO 3251 shall be used Two measurements shall be made and the two results of the content of non-volatile matter shall be reported.
Dilution ability
Procedure
A varnish sample of (50 ± 1) ml shall be poured into a glass cylinder of about 250 ml volume
The supplier and purchaser will agree on the specific solvent and/or diluent to be added in defined portions, such as (10 ± 0.2) ml, until cloudiness or separation occurs After each addition, the mixture in the glass cylinder must be thoroughly stirred to ensure homogeneity and allowed to settle for a minimum of 5 minutes and a maximum of 10 minutes.
Result
One measurement shall be made and the type of solvent and/or diluent and the percentage in volume added without appearance of cloudiness or separation shall be reported.
Stability of varnish in an open vessel
Equipment
If not otherwise specified, the following equipment shall be used:
– a glass cylinder of 7 cm to 8 cm in diameter and of 9 cm to 10 cm in height;
– an oven without forced air circulation and with a rate of ventilation of 6 to 10 air changes per hour
Procedure
Viscosity of the varnish sample shall be determined in accordance with 5.3 at (23 ± 0,5) °C
A varnish sample weighing (150 ± 1) g is placed in a glass cylinder and kept in an oven at (50 ± 2) °C Every 24 hours, a specified amount of solvent and/or diluent is added to compensate for evaporation, ensuring proper mixing with the varnish After 96 hours, the viscosity of the varnish is measured according to section 5.3.
Result
One measurement shall be made and the type of solvent and/or diluent as well as the viscosity before and the viscosity after temperature exposure shall be reported.
Drying and/or curing in thick layer
Equipment
The following equipment shall be used:
– flat and smooth square pieces of aluminium foil, 0,1 mm to 0,15 mm in thickness, having a side length of (95 ± 1) mm;
– a square form made of metal or any suitable solid material (25 ± 1) mm in thickness and having a side length of (45 ± 1) mm;
An oven designed for drying and curing specimens must feature forced air circulation, ensuring a minimum of eight fresh-air changes per hour.
Test specimen
To create a square mould using aluminium foil, clean the foil thoroughly and fold it to achieve dimensions of approximately 45 mm on each side Next, weigh a varnish sample with a mass calculated as \$m = \frac{810 \rho}{X}\$ to an accuracy of 0.1 g, where \$m\$ represents the sample mass in grams (g) and \$\rho\$ denotes the density in grams per cubic centimetre (g/cm³).
X is the non-volatile matter in per cent (%)
After drying and/or curing at a temperature and for a time agreed between the supplier and the purchaser, the aluminium foil shall be removed
NOTE Using the coefficient 810 cm 3 in the above equation ensures a resulting thickness of the specimen of about
4 mm after removing the aluminium foil.
Procedure
The specimen will be evaluated based on the condition of its top side, bottom side, and interior, using visual appearance and tackiness descriptions represented by the symbols in tables 1, 2, and 3.
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Table 1 – Condition of the top side
Table 2 – Condition of the bottom side
Tackiness shall be determined according to 6.4.1
Table 3 – Condition of the interior
Rigid Horny machinable Leather-like Rubber-like Gel-like Liquid
– no voids – not more than five voids – more than five voids
For the condition of the interior, a statement shall be added whether the interior is uniform or not uniform
NOTE It may be necessary to cut the specimen, to bend the specimen with the fingers or to use a knife for describing the mechanical properties.
Result
Two specimens shall be tested and the two results of drying and/or curing in thick layer shall be reported
EXAMPLE For a specimen which has a smooth top side and a non-tacky bottom side, which is leather-like and uniform and which contains three voids, the result is described as:
Effect of varnish on enamelled winding wires
The effect of varnish on enamelled wire is expressed by the pencil hardness of the wire coating after varnish treatment of a straight piece of wire according to IEC 60851-4
Three straight pieces of wire shall be tested and the three results of pencil hardness shall be reported
pH of water or emulsion based varnish (Type W or Type E)
Equipment
The following equipment shall be used:
– laboratory pH meter and associated glassware;
– buffer solutions corresponding to the extremes of the specified pH range of the varnish within ±0,5;
Procedure
The pH meter shall be used in accordance with the manufacturer’s instructions All pH measurements shall be made with material maintained at 23 °C ± 2 K
To ensure accurate readings, calibrate the pH meter using buffer solutions at specific pH values It is essential to rinse the electrodes and glassware with demineralized water between measurements Additionally, repeated measurements for each solution should agree within 0.1 for reliable results.
Thoroughly wash the glass electrode and immerse to the depth specified by the manufacturer in the varnish maintained at 23 °C ± 2 K to determine the pH A repeated measurement shall agree within 0,1.
Result
The result is the mean of the final pair of measurements
6 Methods of test for dried and/or cured varnishes
The materials after drying and/or curing are varnish coatings on substrates.
Test specimen
Steel panel
Unless otherwise specified, a steel panel according to ISO 1514 but of a thickness of
(0,125 ± 0,010) mm, a length of (100 ± 5) mm and a width of at least 80 mm shall be used
The preparation and cleaning of the panel shall be in accordance with the measures proposed in ISO 1514 The steel panel shall be coated according to 6.1.3
According to ISO 1514, steel, tinplate, aluminum, or glass panels are recommended as substrates for paints and varnishes, while copper panels, previously suggested, are now deemed unsuitable Steel panels are preferred for their convenience and ease of handling To ensure standardization, the same type of panels should be used for insulating varnishes and solvent-free impregnating resins Additionally, copper panels should be avoided for unsaturated polyester-based impregnating resins, as they can act as inhibitors or accelerators.
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Textile glass fabric
Textile glass fabric with a plain weave, featuring (21 ± 3) yarns for both warp and weft, and a mass ranging from 40 g/m² to 60 g/m², must be utilized unless specified otherwise, in accordance with ISO 2113 The yarn used for this glass fabric should be the same for both warp and weft, conforming to the types EC5, EC6, or EC7 as per ISO 2078.
Yarn of the type EC5 5,5 × 2 S 150 (the full designation is EC5 5,5 Z 40 × 2 S 150) is a folded
(plied) yarn having two identical components, which are twisted 150 times per metre and which consist of single continuous-filament yarn according to ISO 2078 of the type
EC5 5,5 Z 40 This type is made of continuous filaments of 5 àm thickness, which are twisted
The linear density of the single yarn is 5.5 tex, indicating that it has good electrical properties, denoted by "E," and is made of continuous filament, represented by "C." The letters "S" and "Z" signify opposite directions of twist Tex is a unit of measurement for linear density, defined in milligrams per meter, as per ISO 1144 standards.
The EC5 11 yarn is a single continuous-filament yarn that adheres to ISO 2078 standards It is composed of continuous filaments with a thickness of 5 micrometers The linear density of this single yarn is a key characteristic.
The glass fabric must undergo thermal treatment to reduce its size to less than 0.1% of the original amount It should be composed of glass that contains minimal alkalis, specifically with an alkali content of less than 0.5% (Na₂O + K₂O < 0.5%).
180 mm × 280 mm shall be cut from the glass fabric
For convenient handling, strips of pressboard, such as type B.2.1 per IEC 60641-3-1, should be stapled to the smaller edges of each glass fabric piece These strips should measure approximately 250 mm × 15 mm × 0.7 mm The glass fabric must be impregnated and/or coated as specified in section 6.1.3 After the drying and/or curing process, two specimens of the specified size will be prepared.
(100 ± 1) mm × (100 ± 1) mm shall be cut from each piece.
Preparation of test specimens
The impregnation and coating of substrates must adhere to the specific testing methods outlined in IEC 60464-3 or as mutually agreed upon by the supplier and purchaser This process encompasses critical factors such as temperature and time for impregnation and coating, as well as the draining period, curing conditions, and the temperature-time program, including annealing and cooling stages.
To ensure optimal results, the substrate must be vertically immersed in the varnish at a slow speed to avoid air bubbles on its surface It should remain in the varnish for a minimum of 5 minutes and be removed at a consistent speed not exceeding 2 mm/s.
The specimen must be drained for 10 to 15 minutes and then dried and/or cured according to the established schedule, ensuring it is positioned vertically during this process A specialized oven designed for drying painted and varnished parts, capable of handling large surfaces and significant solvent evaporation, should be used The coating or impregnating process will be repeated by dipping, draining, and drying and/or curing the specimen in the reverse direction.
To achieve the desired coating thickness, if the coating is below the specified value, additional dips in the reverse direction are required for each treatment Conversely, if the coating or specimen thickness exceeds the specified limit, the varnish must be diluted according to the supplier's instructions.
NOTE Increasing the speed by which the specimen is removed from the varnish increases the thickness of the coating; reducing the speed reduces the thickness of the coating.
Thickness of the coating
The thickness of the dried or cured varnish coating must be measured using one of the methods outlined in ISO 2808 It is essential that the coating on the steel panel meets a minimum thickness requirement.
0,050 mm and shall not exceed 0,080 mm on either side of the panel.
Mechanical properties
Bend test (cylindrical mandrel)
The ISO 1519 method with type 1 apparatus requires testing two coated steel panels as per section 6.1.1 After bending the panels around a specified mandrel, they should be visually inspected for cracks The test results will indicate the extent of any observed cracking Additionally, the coating thickness and the mandrel diameter used during bending must be reported alongside the results.
Cupping test
According to ISO 1520, two coated steel panels must be tested to determine the extent of cracking and the depth of indentation The results should include the thickness of the coating along with the two measured outcomes.
Bond strength at ambient temperature
The twisted coil test (method A) and the helical coil test (method B) outlined in IEC 61033 must be utilized, with five specimens tested for each method It is essential to report the testing method, the type of enamelled winding wire used as the substrate, and the five results obtained.
Thermal properties
Bond strength at elevated temperature
The twisted coil test (method A) and the helical coil test (method B) outlined in IEC 61033 must be utilized The testing temperature should align with the specifications in IEC 60464-3 or be mutually agreed upon by the supplier and purchaser A total of five specimens are to be tested, and the method, type of enamelled winding wire substrate, and the five results must be documented.
Temperature index
The temperature index is not a standard property of electrical insulating materials; rather, it is influenced by the selected test method and endpoint criteria Consequently, the temperature index results for the same material can differ by as much as 80 K.
Where test criteria loss of mass and/or breakdown voltage are applied, test specimens according to 6.1.2 shall be used
The IEC 60216 method must be utilized, with test and end-point criteria aligning with the IEC 60464-3 specification sheet or mutually agreed upon by the supplier and purchaser Two test criteria are required, with a minimum of three exposure temperatures applied for each criterion, ensuring that the difference between consecutive temperatures does not exceed 20 K A correlation coefficient below 0.95 indicates a need for further evaluation.
A new set of specimens will be tested at a different exposure temperature than the initially selected ones.
NOTE 1 ISO 2578 is based on the principles laid down in IEC 60216 By deleting all information that is not required for planning and running a temperature index experiment and for calculation of results, ISO 2578 has become a practical short version, as required for use in a laboratory
For the loss of mass test criterion, three specimens will be evaluated at each exposure temperature In the case of the breakdown voltage test criterion, one specimen will be tested following each heat exposure period.
NOTE 2 Such periods can be for instance 1, 2, 4, 8, 16 and 32 weeks, depending on the time to end-point of the specimen at the chosen exposure temperature It is, therefore, recommended to provide at least four specimens for each exposure temperature
Breakdown voltage shall be tested in accordance with 6.5.3, where for each specimen it is allowed to take about five to eight measurements
Each test criterion must include details on specimen preparation, dimensions, quantity, exposure temperatures, and results, all referenced to applicable standards Results should report the time to failure for each temperature, include a graph of property values against the logarithm of failure times, present a thermal endurance graph with a first-order regression line, and provide the temperature index along with the correlation coefficient.
Chemical properties
Tackiness
Tackiness is expressed by the adherence of a piece of filter paper or parts of it to the surface of a dried and/or cured varnish coating
The following equipment shall be used:
– a cylindrical weight of (500 ± 10) g mass and with a contact surface at one end
– soft rubber disks (5 ± 0,5) mm in thickness and (20 ± 0,5) mm in diameter;
– a filter paper made from bleached cotton having a mass of (92 ± 9) g/m 2 , a thickness of
(205 ± 30) àm, a nominal density of 0,45 g/cm 3 and a porosity of 11 s/300 ml
Coated steel panel according to 6.1.1
To conduct the test, a piece of filter paper is placed on the specimen and subjected to a cylindrical weight for one minute, with a rubber disk serving as a protective layer Following the removal of the load, an examination is performed to assess the results.
– the paper separates from the specimen by gravity and/or by means of slight vibration, in which case the surface of the specimen is called non-tacky;
The paper separates from the specimen not through gravity or slight vibration, but by direct contact, ensuring that no paper fibers stick to the specimen's surface, which is referred to as non-tacky.
The paper clings to the specimen, leaving behind a substantial amount of paper fibers once removed, resulting in a surface that is described as tacky.
Two steel panels shall be tested and the two results of tackiness shall be reported.
Resistance to liquids inclusive of water
Procedure A of method 1 given in ISO 2812-1 shall be used Unless otherwise specified, the temperature of the test liquid shall be (23 ± 2) °C and the immersion time shall be (168 ± 1) h
Two coated steel panels must be tested over a period of seven days, as specified in section 6.1.1 The report should include the coating thickness of each panel, the type of test liquid used, and the results from both tests Additionally, any changes in appearance, such as blistering, tackiness, or other signs of deterioration must be documented.
Resistance to vapour of solvents
Resistance to vapour of solvents is expressed by the condition of the specimen after exposure to vapour of solvents
The following equipment shall be used:
– a glass container with dimensions about 300 mm high × 300 mm wide × 500 mm long with a face-ground top edge and with a cover consisting of a plain piece of glass of adequate size;
– a cylindrical glass jar with a height of about 40 mm and a bottom area of about one-third of the bottom area of the glass container;
– adequate means to suspend specimens above the solvent level
Unless otherwise specified, the following solvents shall be used for testing: acetone, xylene, hexane, methanol and carbon disulphide
Coated steel panels according to 6.1.1
Fill a cylindrical glass jar with water to approximately half its height, then position it at the bottom of a glass container filled with the test solvent to a height of 20 mm to 25 mm.
To prevent significant isothermal distillation, a cylindrical glass jar should be filled with a 1:1 mixture of water and either acetone or methanol test solvents.
The specimens must be suspended vertically, aligned parallel to the horizontal line, with their lower edge approximately 150 mm above the test solvent's surface A glass cover should be placed over the container to prevent complete evaporation of the liquids, which should be replenished if necessary The test solvents should be maintained at a temperature of (23 ± 2) °C, with an exposure duration of (168 ± 1) hours, equivalent to seven days After this exposure period, the specimens will be taken out of the container.
All materials must be inspected for changes in appearance, loss of adhesion to the substrate, peeling, draining, blistering, tackiness, or any other signs of deterioration.
Each test solvent will be evaluated using two specimens, with the coating thickness of each panel documented alongside the type of solvent used The results will detail any observable changes, including alterations in appearance, loss of adhesion to the substrate, peeling, draining, blistering, tackiness, or other indications of deterioration.
Resistance to mould growth
The method given in IEC 60068-2-10 shall be used Three coated steel panels according to 6.1.1 shall be tested and the three results of resistance to mould growth shall be reported.
Electrical properties
Effect of water immersion on volume resistivity
The method given in IEC 60093 shall be used If IEC 60093 is not applicable for the material under test, then the following method may be used
The following equipment shall be used:
– any commercially available tera-ohmmeter with an accuracy of ±10 %;
– a metal cylinder to be used as voltage electrode (top electrode) of at least 60 mm in diameter having a mass of about 0,015 MPa to provide a pressure on the specimen;
– one conducting rubber disk having the same diameter as the top electrode and a thickness of 3 mm to 5 mm with a maximum resistance of 1 000 Ω and with a Shore A hardness of 65 to 85;
– a metal cylinder having the same diameter as the top electrode and of about 70 mm in height (bottom electrode)
Coated steel panel according to 6.1.1
The test setup involves positioning the specimen between two metal cylinders, with rubber disks serving as intervening layers For a visual representation of the complete test arrangement, refer to figure 1 The direct current (d.c.) test voltage will be adjusted to achieve a specific electrical field strength.
The specimen must undergo testing before and after being immersed in demineralized water at a temperature of (23 ± 2) °C for a duration of (168 ± 1) hours (seven days) Following immersion, the test setup should be prepared immediately after blotting the specimen with filter papers to eliminate excess water Resistance measurements are to be recorded (15 ± 1) minutes after the setup, with readings taken (60 ± 5) seconds post-electrification.
To calculate the resistivity when the diameter of the top electrode is 60 mm, use the formula: \$\rho = \frac{2.83 \times R}{d_1 + d_2}\$, where \$\rho\$ represents resistivity in ohm-meters (Ωm), \$d_1\$ is the thickness of the coating in millimeters (mm) on the top side of the panel, and \$d_2\$ is the thickness of the coating in millimeters (mm) on the bottom side of the panel.
For different diameters D of the top electrode, replace the factor 2,83 by
Three specimens will be tested, with the thickness of coatings on both sides of each panel, the diameter of the electrodes, and the test voltage documented The results, which include volume resistance and volume resistivity, will be reported before and after immersion in water, along with a reference to the applicable standard.
Dielectric dissipation factor (tan δ ) and relative permittivity ( ε r )
The method given in IEC 60250 shall be used If IEC 60250 is not applicable for the material under test, then the following method may be used
Any commercially available impedance-meter with an accuracy of ±10 % may be used
Coated steel panel according to 6.1.1
The coated panel's metal sheet serves as the bottom electrode, while the top electrode, which must have a minimum diameter of 40 mm, may be accompanied by a shield electrode It is essential that the top electrode is positioned centrally on the bottom electrode.
Electrodes can be created by applying a conductive dispersion, such as graphite or silver, or by depositing a metal film with a maximum thickness of 0.005 mm, ensuring that the application is done within 10 mm from the edges of the bottom electrode.
The test will be conducted at a temperature of (23 ± 2) °C using a sinusoidal test voltage at a frequency of 1 kHz, following the connection guidelines provided in the testing device's instruction manual.
Two specimens will be tested, with the coating thickness of each panel, test temperature, electrode type, test voltage, and frequency documented, along with the results referencing the applicable standard The findings will include the dielectric dissipation factor and relative permittivity.
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Breakdown voltage and electric strength
The method given in IEC 60243-1 shall be used If IEC 60243-1 is not applicable for the material under test, clauses 4 and 6 may be amended as follows
The electrode configuration will utilize a ball-to-plate design, featuring a high-voltage electrode made of a polished steel ball with a radius of (10 ± 0.0005) mm and a surface roughness of less than 0.001 mm Polished steel balls, similar to those used in class III ball bearings, are readily available and suitable for this application.
The coated panel's metal sheet will serve as the earth electrode, positioned on a plate connected to the earth This plate must have a diameter of (75 ± 1) mm and rounded edges with a radius of (3 ± 0.1) mm Refer to figure 2 for an example of the complete test arrangement.
The ball-to-plate electrode configuration offers a marginally higher electric field strength than the plate-to-plate setup, influenced by the radius of the ball electrode and the specimen's thickness Specifically, with a ball radius of 10 mm and a specimen thickness of 0.1 mm, the field strength can increase by approximately 10% compared to the traditional plate-to-plate arrangement.
Coated steel panel according to 6.1.1
The voltage increase rate must not exceed 200 V/s, and the test temperature should be maintained at (23 ± 2) °C unless stated otherwise The testing process requires the specimen and electrodes to be submerged in a dielectric fluid, which is circulated to ensure the specified temperature is upheld Additionally, unless specified differently, the test should utilize unused mineral insulating oil.
IEC 60296 or unused synthetic organic ester according to IEC 61099 shall be employed
Using a sufficiently large round cylindrical glass container for the test set and fluid, with the earth electrode positioned at the bottom, enables visual observation of the process when voltage is applied This setup also facilitates the earth connection and fluid supply from the bottom, while allowing for fluid overflow at the top.
Five specimens will be tested, with the test temperature and type of dielectric fluid documented, along with the five results in accordance with the applicable standards The results will include the thickness of the specimen at the breakdown point, the breakdown voltage, and the electric strength.
Flash rusting of steel by water or emulsion based varnish (Type W or Type E)
Steel sheet panels must be inspected for rusting or discoloration immediately after the curing or drying process, as specified in sections 6.1.1 and 6.1.3 The presence of rusting should be documented as either "present" or "absent."
Volatile organic compound content of water or emulsion based varnish (Type
The methods described in ISO 11890-1 and ISO 11890-2 should be followed, depending on whether the content is greater or less than 15 %
Water content of water or emulsion based varnish (Type W or Type E)
The method described in ISO 760 should be used
Test specimen (steel panel, coated on both sides)
Figure 1 – Test set-up for volume resistivity
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Spherical top for high-voltage connection
Specimen (coated steel panel, connected to plate electrode)
Figure 2 – Example of electrode arrangement
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4 Observations générales sur les méthodes d’essai 31
5 Méthodes d’essai pour les vernis non secs et/ou non durcis 32
5.4 Teneur en matière non volatile 32
5.6 Stabilité du vernis dans un récipient ouvert 33
5.7 Séchage et/ou durcissement en couche épaisse 33
5.8 Effet du vernis sur des fils de bobinage émaillés 35
5.9 pH du vernis à base d'eau ou d'émulsion (Type W ou Type E) 35
6 Méthodes d’essai pour des vernis secs et/ou durcis 35
6.1.2 Matériau en tissu de verre 36
6.2.1 Essai de pliage (mandrin cylindrique) 37
6.2.3 Pouvoir agglomérant à la température ambiante 37
6.3.1 Pouvoir agglomérant pour des températures élevées 37
6.4.2 Résistance aux liquides y compris l’eau 39
6.4.3 Résistance aux vapeurs de solvants 39
6.5.1 Effet de l’immersion dans l’eau sur la résistivité transversale 40
6.5.2 Facteur de dissipation diélectrique (tan δ) et permittivité relative (ε r ) 41
6.5.3 Tension de claquage et rigidité diélectrique 42
6.6 Enrouillement instantané de l'acier causé par un vernis à base d'eau ou d'émulsion (Type W ou Type E) 43
6.7 Teneur en composés organiques volatiles du vernis à base d'eau ou d'émulsion (Type W ou Type E) 43
6.8 Teneur en eau du vernis à base d'eau ou d'émulsion (Type W ou Type E) 43
Figure 1 – Dispositif d’essai pour la résistivité transversale 43
Figure 2 – Exemple pour la disposition des électrodes 44
Tableau 1 – Etat de la partie supérieure 34
Tableau 3 – Etat de la partie intérieure 34
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VERNIS UTILISÉS POUR L'ISOLATION ÉLECTRIQUE –
The International Electrotechnical Commission (IEC) is a global standards organization comprising national electrotechnical committees Its primary goal is to promote international cooperation on standardization issues in the fields of electricity and electronics To achieve this, the IEC publishes international standards, technical specifications, technical reports, publicly accessible specifications (PAS), and guides, collectively referred to as "IEC Publications." The development of these publications is entrusted to study committees, which allow participation from any national committee interested in the subject matter Additionally, international, governmental, and non-governmental organizations collaborate with the IEC in its work The IEC also works closely with the International Organization for Standardization (ISO) under conditions established by an agreement between the two organizations.
The official decisions or agreements of the IEC on technical matters aim to establish an international consensus on the studied topics, as the relevant national committees of the IEC are represented in each study committee.
The IEC publications are issued as international recommendations and are approved by the national committees of the IEC While the IEC makes every reasonable effort to ensure the technical accuracy of its publications, it cannot be held responsible for any misuse or misinterpretation by end users.
To promote international consistency, IEC National Committees strive to transparently implement IEC Publications in their national and regional documents Any discrepancies between IEC Publications and corresponding national or regional publications must be clearly stated in the latter.
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The consolidated version of IEC 60464-2 is designated as edition 2.1 It includes the second edition (2001-07) and its amendment 1 (2006-01) The technical content remains consistent with that of the base edition and its amendment.
In this Redline version, a vertical line in the margin indicates that the technical content has been modified by Amendment 1 Additions and deletions are highlighted in red, with deletions struck through A final version incorporating all accepted modifications is available in this publication.
Cette publication a été préparée par commodité pour l’utilisateur
La Norme internationale IEC 60464-2 a été établie par le sous-comité 15C: Spécifications, du comité d’études 15 de l’IEC: Matériaux isolants
Cette publication a été rédigée selon les Directives ISO/IEC, Partie 3
The committee has determined that the content of the original publication and its amendment will remain unchanged until the stability date specified on the IEC website.
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• remplacée par une édition révisée, ou
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La présente partie de l’IEC 60464 fait partie d’une série traitant des vernis utilisés pour l’isolation électrique Cette série comprend trois parties:
Partie 1: Définitions et prescriptions générales (IEC 60464-1);
Partie 3: Spécifications pour les matériaux particuliers (IEC 60464-3)
VERNIS UTILISÉS POUR L'ISOLATION ÉLECTRIQUE –