IEC 60282-4:2020

IEC 60282-4 ®
Edition 1.0 2020-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
High-voltage fuses –
Part 4: Additional testing requirements for high-voltage expulsion fuses utilizing
polymeric insulators
Fusibles à haute tension –
Partie 4: Exigences d'essai supplémentaires pour les fusibles à expulsion à
haute tension utilisant des isolateurs polymériques

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IEC 60282-4 ®
Edition 1.0 2020-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
High-voltage fuses –
Part 4: Additional testing requirements for high-voltage expulsion fuses utilizing

polymeric insulators
Fusibles à haute tension –
Partie 4: Exigences d'essai supplémentaires pour les fusibles à expulsion à

haute tension utilisant des isolateurs polymériques

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.50 ISBN 978-2-8322-8089-8

– 2 – IEC 60282-4:2020 © IEC 2020
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Type tests . 8
4.1 General requirements . 8
4.2 Mechanical tests . 8
4.2.1 Mechanical stressing at temperature extremes . 8
4.2.2 Long term deformation/creep testing . 10
4.3 Environmental tests . 11
4.3.1 General . 11
4.3.2 Accelerated weathering test . 11
4.3.3 Tracking and erosion test . 12
4.3.4 Flammability test . 13
4.4 Tests on interfaces and connections of end fittings . 13
4.4.1 General . 13
4.4.2 Water immersion pre-stressing procedure . 14
4.4.3 Verification tests . 14
4.5 Breaking tests with dye penetration. 15
4.5.1 General . 15
4.5.2 Description of tests to be made . 15
4.6 Acceptance criteria . 15
Bibliography . 16

Figure 1 – Test sequence . 9
Figure 2 – Dye penetration test arrangement . 10
Figure 3 – Tracking wheel test arrangement . 13

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HIGH-VOLTAGE FUSES –
Part 4: Additional testing requirements for high-voltage
expulsion fuses utilizing polymeric insulators

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
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patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60282-4 has been prepared by subcommittee 32A: High-voltage
fuses, of IEC technical committee 32: Fuses.
The text of this International Standard is based on the following documents:
FDIS Report on voting
32A/346/FDIS 32A/348/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

– 4 – IEC 60282-4:2020 © IEC 2020
A list of all parts in the IEC 60282 series, published under the general title High-voltage fuses,
can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
INTRODUCTION
High-voltage expulsion fuses are tested according to IEC 60282-2 which recognizes that fuse-
bases may use polymer (non-ceramic) insulators. However, very little additional testing is
specified for fuses using such insulators. In the case of polymer post insulators and
suspension insulators, only artificial pollution tests are required in accordance with IEC 61592
and IEC 61109, respectively. However, for fuses that use insulators not covered by these
International Standards, such as certain fuse-cutouts, the additional testing required is by
agreement between manufacturer and user. Fuses that need such "additional testing" are
expulsion fuses that utilize polymer insulators in which a single mounting bracket is used,
either at the centre of an insulator or connected to two insulators (a "cutout fuse-base"). As
the market for expulsion fuses using polymer insulators has grown, manufacturers have
introduced many tests in addition to artificial pollution tests, covering other aspects of a fuse's
performance. This document formalises such testing and provides standardisation and
consistency. It should be noted that the document focusses on product testing as opposed to
material testing. In addition to drawing on test procedures covered by IEC 62217:2012,
Polymeric HV insulators for indoor and outdoor use – General definitions, test methods and
acceptance criteria, material from IEEE Std C37.41™:2016 (primarily 18.1.2 Long-term
deformation/creep testing) is also used, with the permission of IEEE.

– 6 – IEC 60282-4:2020 © IEC 2020
HIGH-VOLTAGE FUSES –
Part 4: Additional testing requirements for high-voltage
expulsion fuses utilizing polymeric insulators

1 Scope
This part of IEC 60282 applies to expulsion fuses complying with IEC 60282-2 and specifies
additional testing requirements for fuses employing a cutout fuse-base that utilizes polymeric
insulators.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements of this document. For dated references, only the edition
cited applies. For undated references, the latest edition of the referenced document (including
any amendments) applies.
IEC 60060-1:2010, High-voltage test techniques – Part 1: General definitions and test
requirements
IEC 60282-2:2008, High-voltage fuses – Part 2: Expulsion fuses
ISO 4287, Geometrical Product Specifications (GPS) – Surface Texture: Profile method –
Terms, definitions and surface texture parameters
ISO 4892-2, Plastics – Methods of exposure to laboratory light sources – Part 2: Xenon-arc
lamps
ISO 868, Plastics and ebonite – Determination of indentation hardness by means of a
durometer (Shore hardness)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
polymeric insulator
insulator whose insulating body consists of at least one organic based material
Note 1 to entry: Polymeric insulators are also known as non-ceramic insulators.
Note 2 to entry: Coupling devices may be attached to the ends of the insulating body.
[SOURCE: IEC 60050-471:2007, 471-01-13]

3.2
composite polymeric insulator
polymeric insulator made of at least two polymeric insulating parts, namely a core and a
housing equipped with end fittings
[SOURCE: IEC 60050-471:2007, 471-01-02, modified – the term "polymeric" added and the
note to entry deleted.]
3.3
core (of a composite polymeric insulator)
central insulating part of a composite polymeric insulator which provides the primary
mechanical characteristics of the insulator
[SOURCE: IEC 60050-471:2007, 471-01-03, modified – addition of "composite polymeric";
addition of "primary" and "of the insulator"; note to entry deleted.]
3.4
housing
external insulating part(s) of a composite polymeric insulator that provides the necessary
creepage distance, other dielectric characteristics of the insulator, and protects the core from
the environment
[SOURCE: IEC 60050-471:2007, 471-01-09, modified – "of a composite polymeric insulator"
and "other dielectric characteristics of the insulator" added.]
3.5
insulating body
insulating assembly that contains the insulator and permanent fittings
3.6
insulator trunk
central insulating part of an insulator from which the sheds project
Note 1 to entry: Also known as shank on smaller insulators.
[SOURCE: IEC 60050-471:2007, 471-01-11]
3.7
shed (of an insulator)
insulating part, projecting from the insulator trunk, intended to increase the creepage distance
Note 1 to entry: The shed can be with or without ribs.
[SOURCE: IEC 60050-471:2007, 471-01-15]
3.8
cutout fuse-base
fuse-base that uses an insulator or insulators having a single point mounting bracket
Note 1 to entry: The mounting bracket is generally located centrally between the terminals that are mounted at
the outer ends of the insulator(s).
3.9
resin insulator
polymeric insulator whose insulating body consists of a solid shank and sheds protruding from
the shank made from only one organic based housing material (e.g. cycloaliphatic epoxy)

– 8 – IEC 60282-4:2020 © IEC 2020
3.10
interface
surface between the different materials
Note 1 to entry: Various interfaces occur in most composite insulators, for example:
– between housing and fixing devices;
– between core and housing.
4 Type tests
4.1 General requirements
Fuses according to this document shall comply with the requirements of IEC 60282-2, except
for those that are specifically replaced with requirements specified in this document for the
following type tests.
4.2 Mechanical tests
4.2.1 Mechanical stressing at temperature extremes
4.2.1.1 General
When conducting this test with a fuse using a polymeric insulator(s), it is not necessary to
perform the mechanical tests outlined in 8.8.1 of IEC 60282-2:2008. The testing covered
in 4.2.1 only applies to devices that can be opened and closed manually.
4.2.1.2 Test procedure
Three new fuses shall be used for this test. The test samples shall consist of the fuse-base,
fuse-carrier, and end fittings. The fuse carriers should contain fuse-links of sufficiently high
current rating, or dummy links, so that the fuse-links are not subjected to the same endurance
test as the fuse-bases and fuse-carriers.
All samples shall be cycled between −30 °C (+0 °C, −5 °C) and +40 °C (+5 °C, −0 °C). The
samples shall remain at each temperature extreme for a minimum of 8 h per cycle. The cycle
time from one temperature extreme to the other shall be any convenient value, however the
sample rate of temperature change should be no more than 0,5 °C/min to avoid thermal shock.
All samples shall complete 4 cycles (a cycle includes both temperature extremes) resulting in
a minimum total test time of approximately 83 h. See Figure 1 for a representation of the
preferred test sequence. If the specified minimum ambient air temperature for the fuse is
other than −30 °C (see IEC 60282-2:2008, 4.1 a)) then this value (+0 °C, −5 °C) shall be used
for the minimum temperature of the cycle.
Once per cycle, manual open/close operations shall be performed, using a device approved
by the manufacturer. At the end of an eight-hour cold or hot period, each sample is subjected
to 50 open/close operations. All operations shall be performed at a minimum 30° angle from
centreline with 25 on the right and 25 on the left. The closing force should simulate typical
service conditions as recommended by the manufacturer. Tests shall alternate with each
cycle such that over the four cycles, a total of 100 open/close operations are performed hot
and 100 open/close operations cold. The four-cycle sequence can start with a hot period or
cold period, but a cold period is the preferred sequence.

Figure 1 – Test sequence
4.2.1.3 Acceptance criteria
4.2.1.3.1 Initial acceptance criteria
The following are the initial criteria for successful completion of this test:
a) Overall length of fuse-base shall comply with manufacturer's specification.
b) No loose or deformed parts, cracks or other obvious visual deformation in any of the
assemblies shall occur.
c) Each sample shall perform its intended function as demonstrated by 4.2.1.3.2.
4.2.1.3.2 Acceptance testing
After the samples have passed the initial acceptance criteria listed in 4.2.1.3.1, further tests
are performed to determine that the fuse has not received damage to impair its current
carrying capability and drop-out capability.
a) Each sample shall be subjected to a temperature rise test as specified in IEC 60282-2.
The temperature rise of individual components may exceed the temperature rise limits
specified in IEC 60282-2, provided that all temperature measurements demonstrate that
the fuse has reached temperature stability, without thermal runaway occurring.
b) Each sample shall demonstrate it is capable of full mechanical performance when a fuse
element melts. For drop-out devices, capability can be verified by the following process.
Each sample shall have a fuse-carrier mounted in the fuse-support with an appropriately
sized fuse-link. Sufficient current shall be passed through the fuse to cause the element to
melt. The sample shall operate and move to the proper open condition.
4.2.1.4 Dye penetration test for composite polymeric insulators
After the testing detailed in 4.2.1.3.1 and 4.2.1.3.2 a dye penetration test is performed to
verify that no damage to the core material occurred during the mechanical tests. Four
samples shall be cut from each tested insulator making the cut approximately 90° to the long
axis of the insulator. Using a diamond-coated circular saw blade under running cold water is
the preferred method, however other cutting methods may be used with agreement from the
manufacturer. The length of the samples shall be 10 mm ± 1,0 mm. The cut surfaces shall be
smoothed by means of fine abrasive cloth (grain size 180). The cut ends shall be clean and
parallel. The specimens shall be placed (long axis of the insulator vertical) on a layer of steel
or glass balls of the same diameter (1 mm to 2 mm) in a vessel or tray. A solution of 1 % (by

– 10 – IEC 60282-4:2020 © IEC 2020
weight) of Astrazon BR 200 in methanol shall be poured into the vessel, its level being 2 mm
to 3 mm higher than the level of the balls. See Figure 2 for a representation of this test
arrangement. The specimens shall be observed for 15 min. Other, equivalent, products to
Astrazon BR 200 may be used.
Dimensions in millimetres
Figure 2 – Dye penetration test arrangement
4.2.1.5 Dye penetration test acceptance criteria
No dye shall rise through the specimens before the 15 min have elapsed. Steps may be taken
to prevent dye wicking up the outside surface of the samples.
4.2.2 Long term deformation/creep testing
4.2.2.1 General
This test is for fuses that incorporate composite and/or resin type polymeric insulators.
4.2.2.2 Number of devices to be tested
Three new test samples shall be used for this test, consisting of a fuse-base and a
disconnecting blade, or a fuse-base, fuse-carrier and fuse-link. The test procedure is:
a) The distance between the upper contact and lower hinge on all three fuse-bases shall be
measured.
b) The test samples shall be placed into an oven at 75 °C (+5 °C, −0 °C) until all components
have reached thermal equilibrium.
c) Once all components have reached the proper temperature, the three disconnecting
blades or fuse-carriers and fuse-links shall be installed into the three fuse-bases in the
closed position.
d) After 8 h have passed, the first device is removed and placed in a water bath, at ambient
temperature, for one minute. After one minute, the disconnecting blade or fuse-carrier and
fuse-link is removed and the distance between the upper contact and lower hinge is
measured.
_____________
Astrazon BR 200 is an example of a suitable product available commercially. This information is given for the
convenience of users of this document and does not constitute an endorsement by the IEC of this product.
Reproduced from IEEE Std C37.41:2016, with the permission of IEEE.

e) After 24 h have passed, the second device is removed and placed in a water bath, at
ambient temperature, for one minute. After one minute, the disconnecting blade or fuse-
carrier and fuse-link is removed and the distance between the upper contact and lower
hinge is measured.
f) After 168 h, the final device is removed and placed in a water bath, at ambient
temperature, for one minute. After one minute, the disconnecting blade or fuse-carrier and
fuse-link is removed and the distance between the upper contact and lower hinge is
measured.
4.2.2.3 Acceptance criteria
a) The final measured length of all samples shall be within the limits defined by the
manufacturer.
b) Each sample shall be subjected to a temperature rise test at rated current of the fuse-base
or fuse-carrier, whichever is lower. The temperature rise of individual components may
exceed the temperature rise limits specified in IEC 60282-2, provided that all
measurements demonstrate that temperature stability, without thermal runaway, has
occurred.
c) The samples shall demonstrate that they remain capable of proper mechanical
performance. For dropout devices, performance shall be verified by the following process.
Each sample shall have a fuse-carrier mounted in the fuse-support and current passed
through the fuse element sufficient to melt it. The sample shall be verified to have
operated and moved to the proper open state.
4.3 Environmental tests
4.3.1 General
These tests are for fuses that incorporate composite and/or resin type polymeric insulators.
4.3.2 Accelerated weathering test
4.3.2.1 Test procedure
Three new fuse-bases shall be selected with labels/markings included, if applicable.
The new fuse-bases shall be subjected to a 1 000 h UV light test using the following test
method. Markings on the housing, if any, shall be directly exposed to UV light:
Xenon-arc methods: ISO 4892-2, using cycle 1 with a dark period of 8 h
NOTE More information on accelerated weathering tests can be found in CIGRE Technical Brochure No. 488.
4.3.2.2 Acceptance criteria
After the test, markings on shed or housing material shall still be legible; cracks, blisters, and
crumbling are not permitted. General surface degradation shall be measured using the
following method.
Two surface roughness measurements shall be made on each of the three specimens. The
roughness, Rz as defined in ISO 4287, shall be measured along a sampling length of at least
2,5 mm. Rz shall not exceed 0,1 mm.
A 1 min dry power frequency withstand voltage test shall be performed on each sample (fitted
with a disconnecting blade, or a fuse-carrier and fuse-link) as specified in IEC 60060-1. Each
sample shall withstand its rated short-duration power frequency withstand voltage. If flashover
or puncture occurs, the fuse shall be considered to have failed the test.

– 12 – IEC 60282-4:2020 © IEC 2020
4.3.3 Tracking and erosion test
4.3.3.1 General
These tests are for fuses that incorporate composite and/or resin type polymeric insulators.
Three samples shall be selected for the test procedure in 4.3.3.2, and for acceptance criteria
testing in 4.3.3.3. A fourth sample shall be selected for acceptance criteria testing in 4.2.2.3.
This forth reference sample shall not be tested in accordance with 4.3.3.2.
The devices shall be mounting on a tracking wheel. The tracking wheel cycles each device
through 4 periods: submersion, drip, energized, and cooling, see Figure 3 for reference. The
saline solution in the tank shall contain deionized water and 1,40 ± 0,06g/l of NaCl.
4.3.3.2 Test procedure
a) Set up and energize the circuit. The test voltage shall be no less than 58 % of the device's
maximum rated voltage. The test circuit, when loaded with a resistive current of 250 mA
(RMS) on the high-voltage side, shall experience a maximum drop of 5 %.
b) Each sample shall be exposed to 30 000 cycles. One cycle shall consist of one insulator
rotating through each period. Each cycle shall be completed in 200 s ± 25 s, with the
insulator being stationary no less than 80 % of the cycle time. Each of the 4 periods shall
be approximately equal in duration. Several interruptions of the test for inspection
purposes, each of these not exceeding 15 min, are permissible. Interruption periods shall
not be counted in the test duration.
c) The test samples shall be given a 24-hour recovery period after each 96 h test period.
During this period, the test procedure remains unchanged, except that the saline solution
is removed from the dip tank.
The 24 h recovery period may be omitted upon agreement with the manufacturer and test
station.
d) Upon completion of all 30 000 cycles. The samples shall be removed and evaluated within
a 48 h period.
The tracking and erosion test shall be regarded as passed if all samples met the following
criteria and the acceptance testing according to 4.3.3.3:
• Each sample shall complete all 30 000 cycles without the leakage current rising
above 250 mA.
• No punctures of a shed, housing or interface.
• For composite insulators: tracking/erosion shall not reach the core.
• For resin insulators: erosion depth is less than 3 mm.
4.3.3.3 Acceptance testing procedure
Each aged sample and reference sample shall be subjected to the following tests. The
procedures shall be completed in the following order.
a) Rinse all samples with deionized water.
b) Measure the resistance using a mega-ohm meter with a test voltage not less than 1 kV.
The resistance shall not be less than 3 MΩ. Three measurements shall be taken: end
fitting to end fitting and each end fitting to the centre fitting.
c) Steep-front impulse voltage test and acceptance criteria according to 4.4.3.2.
d) Dry power frequency withstand voltage test and acceptance criteria according to 4.4.3.3.
e) Lightning impulse voltage dry test according to IEC 60060-1. Impulse wave shape shall be
the standard 1,2/50 µs. Each sample shall withstand 80 % of its rated lightning impulse
withstand voltage.
Figure 3 – Tracking wheel test arrangement
4.3.4 Flammability test
No flammability tests are required for any type of polymeric insulator being part of cut out fuse
bases. However, if required by the customer, further information on flammability testing
associated with polymer insulators can be found in IEC 62217.
4.4 Tests on interfaces and connections of end fittings
4.4.1 General
This testing is for fuses that incorporate composite and/or resin type polymeric insulators. A
test sample shall consist of a fuse-base and a disconnecting blade, or a fuse-base, fuse-
carrier, and fuse-link.
Fuses using composite polymeric insulators are subject to pre-stressing. For pre-stressing,
three samples shall be selected. A fourth sample shall be selected for verification tests (4.4.3)
but this reference sample shall not be pre-stressed.
Fuses that do not require pre-stressing (i.e. those that use resin insulators) before the
verification tests do not require the use of a reference sample as the tested fuses are used to
determine the reference flashover voltage. Three samples shall be tested.

– 14 – IEC 60282-4:2020 © IEC 2020
4.4.2 Water immersion pre-stressing procedure
Pre-stressing only applies to fuses using composite polymeric insulators. Only the fuse-base
is required to undergo the pre-stressing procedure.
a) The hardness of the insulator housing shall be measured for each sample. Measurement
shall be in accordance with ISO 868 using a Shore A Durometer.
b) Each sample shall be boiled for 100 h in water having 0,1 % by weight of NaCl.
c) After boiling, each insulator sample shall be allowed to cool and rinsed with deionized
water.
d) The hardness shall be re-measured. The hardness shall not have changed by more than
20 %.
e) The verification tests (4.4.3) shall be completed within 48 h of the samples being removed
from the boiling water.
4.4.3 Verification tests
4.4.3.1 General
The following verification tests apply to fuses that incorporate composite and/or resin type
polymeric insulators. Tests in 4.4.3.2 shall be performed before tests in 4.4.3.3. Additionally,
for composite polymeric insulators, the procedure in 4.4.2 shall be performed prior to tests in
4.4.3.2.
4.4.3.2 Steep-front impulse voltage test
Each sample, and the reference sample if necessary, shall be subjected to steep-front
impulse flashovers resulting from ten positive and ten negative voltage waves. The voltage
shall rise at a minimum of 1 000 kV/μs. For an example of these waves see IEC 60060-1:2010,
Figure 12. The samples shall be mounted per the manufacturer's specification with fuse-
carriers or disconnecting blades installed in the fuse-base. The fuse-base shall be earthed
and both terminals energised. The test shall be regarded as passed if all samples met the
following criteria:
• Each impulse shall cause an external flashover.
• For composite insulators: there are no punctures that expose the core.
• For resin insulators: there are no punctures to any potted fittings.
NOTE The typical industry perspective is that punctures of any kind are not allowed. However, the intent of this
test is to significantly stress the interface between core and housing, or fitting and resin insulator, by subjecting the
cutout to a "failure" mode (flashover). Based on the typical construction of composite polymer cutouts, punctures to
the centrally located mounting bracket may not impact the rated dielectric strength of some designs. To test this,
additional, subsequent, tests are specified. These are a dry power frequency test in 4.4.3.3, and in the case of the
tracking and erosion test (4.3.3), after the testing performed in accordance with 4.4.3.2 and 4.4.3.3 a lightning
impulse test is performed (see 4.3.3.3). Note that for these tests, any (additional) punctures are not allowed.
4.4.3.3 Dry power frequency test
The dry power frequency voltage (reference flashover voltage) shall be determined by
averaging five flashover voltages on each sample. If a reference sample is being used, the
average flashover voltage for this sample is the reference flashover voltage. The reference
flashover voltage shall be corrected to normal standard atmospheric conditions in accordance
with IEC 60060-1. The flashover voltage shall be obtained by increasing the voltage linearly
from zero within 1 min.
Before commencing the following test, the shank temperature on all test samples, including
the reference sample if applicable, shall be determined by averaging three values measured
between the sheds along the length of the insulator(s) (reference temperature).
The test samples, and the reference test sample if applicable, shall then be continuously
subjected for 30 min to 80 % of the reference flashover voltage.

Measurement of the shank temperature on all test specimens, and of the reference sample if
applicable, shall be repeated immediately after the removal of the test voltage.
The test shall be regarded as passed if all samples meet the following criteria:
• The average flashover voltage of a pre-stressed sample shall be greater than or equal to
90 % of the reference flashover voltage.
• There are no additional punctures of the shed, housing or interface.
• The difference between the temperature rise of the pre-stressed samples and the
reference sample shall be less than 10 K.
• In cases where there is no reference sample, then the maximum temperature rise shall be
less than 20 K compared to the reference temperature determined prior to the power
frequency tests.
4.5 Breaking tests with dye penetration
4.5.1 General
This test applies to fuses that use composite and/or resin type polymeric insulators. The
purpose of the test is to assess the interrupting performance of fuse-bases incorporating
polymeric insulators.
4.5.2 Description of tests to be made
The breaking tests shall be made with single-phase alternating current.
Tests shall be made in accordance with IEC 60282-2:2008, 8.6, Test Duty 1: Verification of
operation with the rated maximum breaking current I .
It is not necessary to perform additional Test Duty 1 tests to those specified in
IEC 60282-2:2008. Fuse-supports from tests performed in accordance with Test Duty 1 of
IEC 60282-2:2008, 8.6 may be used to evaluate the requirements of 4.5.
4.6 Acceptance criteria
a) There shall be no visible damage to the polymeric insulator(s) and test samples shall meet
the requirements of IEC 60282-2:2008, 7.2.
b) For fuses that use composite polymeric insulators, samples cut from each tested insulator
shall be subjected to a dye penetration test in accordance to the requirements of 4.2.1.4 in
order to verify that no damage to the core material has occurred. The fuses are
considered to have passed the tests if all samples meet the requirements in 4.2.1.5.

– 16 – IEC 60282-4:2020 © IEC 2020
Bibliography
IEC 62217:2012, Polymeric HV insulators for indoor and outdoor use – General definitions,
test methods and acceptance criteria
IEEE C37.41™-2016, IEEE Standard Design Tests for High-Voltage (>1000 V) Fuses and
Accessories
CIGRE Technical Brochure No. 488, Resistance to Weathering and UV Radiation of Polymeric
Materials for Outdoor Insulation

_____________
– 18 – IEC 60282-4:2020 © IEC 2020
SOMMAIRE
AVANT-PROPOS . 19
INTRODUCTION . 21
1 Domaine d'application . 22
2 Références normatives . 22
3 Termes et définitions . 22
4 Essais de type . 24
4.1 Exigences générales . 24
4.2 Essais mécaniques . 24
4.2.1 Contraintes mécaniques à des températures extrêmes . 24
4.2.2 Essais de déformation/fluage à long terme . 26
4.3 Essais d'environnement . 27
4.3.1 Généralités . 27
4.3.2 Essai accéléré de résistance aux intempéries . 27
4.3.3 Essai de cheminement et d'érosion . 28
4.3.4 Essai d'inflammabilité . 30
4.4 Essais sur les interfaces et connexions d'armatures d'extrémité . 30
4.4.1 Généralités . 30
4.4.2 Modalités de précontrainte par immersion dans l'eau . 31
4.4.3 Essais de vérification . 31
4.5 Essais de coupure avec pénétration de colorant . 32
4.5.1 Généralités . 32
4.5.2 Description des essais à effectuer . 32
4.6 Critères d'acceptation . 32
Bibliographie . 33

Figure 1 – Séquence d'essais . 25
Figure 2 – Montage de l'essai de pénétration de colorant . 26
Figure 3 – Montage d'essai pour la roue d'endurance . 30

COMMISSION ÉLECTRONIQUE INTERNATIONALE
____________
FUSIBLES À HAUTE TENSION –
Partie 4: Exigences d'essai supplémentaires pour
les fusibles à expulsion à haute tension
utilisant des isolateurs polymériques

AVANT-PROPOS
1) La Commission Électrotechnique Internationale (IEC) est une organisation mondiale de normalisation composée
de l'ensemble des comités électrotechniques nationaux (Comités nationaux de l'IEC). L'IEC a pour objet de
favoriser la coopération internationale pour toutes les questions de normalisation dans les doma
...