IEC 60282-1:2009/AMD1:2014

Amendment 1 - High-voltage fuses - Part 1: Current-limiting fuses

Amendement 1 - Fusibles à haute tension - Partie 1: Fusibles limiteurs de courant

General Information

• Status: Published
• Publication Date: 21-Jul-2014
• ICS: 29.120.50 - Fuses and other overcurrent protection devices
• Technical Committee: SC 32A - High-voltage fuses
• Drafting Committee: MT 3 - TC 32/SC 32A/MT 3
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 14-Apr-2020

Relations

• Amends: IEC 60282-1:2009 - High-voltage fuses - Part 1: Current-limiting fuses
• Effective Date: 05-Sep-2023
• Revised: IEC 60282-1:2020 - High-voltage fuses - Part 1: Current-limiting fuses
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60282-1


®


Edition 7.0 2014-07



INTERNATIONAL



STANDARD



NORME
INTERNATIONALE
A MENDMENT 1
AM ENDEMENT 1

High-voltage fuses –
Part 1: Current-limiting fuses

Fusibles à haute tension –
Partie 1: Fusibles limiteurs de courant


IEC 60282-1:2009-10/AMD1:2014-07(en-fr)

---------------------- Page: 1 ----------------------
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IEC 60282-1



®



Edition 7.0 2014-07







INTERNATIONAL





STANDARD







NORME



INTERNATIONALE




A MENDMENT 1

AM ENDEMENT 1





High-voltage fuses –

Part 1: Current-limiting fuses




Fusibles à haute tension –

Partie 1: Fusibles limiteurs de courant

















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE

PRICE CODE
INTERNATIONALE

CODE PRIX M


ICS 29.120.50 ISBN 978-2-8322-1669-9



Warning! Make sure that you obtained this publication from an authorized distributor.

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® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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– 2 – IEC 60282-1:2009/AMD1:2014

© IEC 2014




FOREWORD


This amendment has been prepared by subcommittee 32A: High-voltage Fuses, of IEC

technical committee 32: Fuses.


The text of this amendment is based on the following documents:


FDIS Report on voting

32A/311/FDIS 32A/312/RVD


Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the stability date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

_____________

1.2 Normative references
Add, after IEC 62271-105:2002, the following reference:
IEC TR 62655:2013, Tutorial and application guide for high-voltage fuses


3.1.6
breaking capacity
Replace the existing text of definition 3.1.6 by the following new text:
value of prospective current that a fuse-link is capable of breaking at a stated voltage under
prescribed conditions of use and behaviour
[SOURCE: IEC 60050-441, 441-17-08, modified (modified definition and Notes removed)]

3.1.14
cut-off (current) characteristic;
let-through (current) characteristic
Replace the existing text by the following new text:

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IEC 60282-1:2009/AMD1:2014 – 3 –

© IEC 2014

curve giving the cut-off current as a function of the r.m.s prospective current, under stated

conditions of operation


Note 1: The values of the cut-off currents are the maximum values that can be reached whatever the degree of

asymmetry.

[SOURCE: IEC 60050-441, 441-17-14, modified (modified definition and Note to entry)]





3.1.15
recovery voltage
Replace the existing text of definition 3.1.15 by the following new text:
voltage which appears across the terminals of a fuse after the breaking of the current
Note 1: This voltage may be considered in two successive intervals of time, one during which a transient voltage
exists, followed by a second one during which the power frequency recovery voltage alone exists.
[SOURCE: IEC 60050-441, 441-17-25, modified (modified definition and Note to entry)]

Add the following new definition:
3.1.22
maximum breaking current
maximum value of prospective current that a fuse-link is capable of breaking at a stated
voltage under prescribed conditions of use and behaviour

3.3.2
classes
Replace
"See 9.3.3."
by
"See IEC/TR 62655:2013, 4.2.2."


3.3.4
General-Purpose fuse
Replace the existing definition by the following new defintion:
current-limiting fuse capable of breaking, under specified conditions of use and behaviour, all
currents from the rated maximum breaking current down to a low value equal to the current
that causes melting of the fuse element in 1 h

4.1 General
Replace the existing text of point b)5) by the following new text:

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– 4 – IEC 60282-1:2009/AMD1:2014

© IEC 2014

b) 5) Rated minimum breaking current for Back-Up fuses (4.8.2)





4.2 Rated voltage


Replace the existing title and text of 4.2 by the following new title and text (keep the existing

Table 3):


4.2 Rated voltage (U )
r


Voltage used in the designation of the fuse-base or fuse-link, from which the test conditions
are determined.
NOTE 1 This rated voltage represents the highest voltage for equipment (see IEC 60038)
NOTE 2 On three-phase solidly earthed systems, fuses may only be used provided that the highest system
voltage is less than or equal to their rated voltage. On single phase or non-solidly earthed systems, fuses may only
be used provided that the highest system voltage is less than or equal to 87 % of their rated voltage, unless
specific testing has been performed (see IEC/TR 62655:2013, 5.1.3).
The rated voltage of a fuse should be selected from the voltages given in Table 3.

4.3 Rated Insulation level (of a fuse base)
Replace the first two paragraphs of 4.3 by the following new text:
"The voltage values (both power frequency and impulse) that characterise the insulation of
the fuse-base with regard to its capability of withstanding dielectric stresses (see
IEC/TR 62655:2013, 4.5).
Two levels of dielectric withstand are recognised for a fuse-base according to European
practice. These are termed "List 1" and "List 2" and relate to different severities of application
and corresponding different values of test voltage for the dielectric tests
(see IEC/TR 62655:2013, 4.5.2)."

4.6 Rated current of the fuse-link
Replace the existing title and first paragraph of 4.6 by the following new title and text:

4.6 Rated current of the fuse-link (I )
r
The current assigned to the fuse-link that a new clean fuse-link will carry continuously without
exceeding specified temperature rises when mounted on a fuse-base specified by the
manufacturer and connected to the circuit with certain specified conductor sizes and lengths,
at an ambient air temperature of not more than 40 °C (see IEC/TR 62655:2013).
4.7 Temperature-rise limits
Replace the existing Note by the following two new Notes:
NOTE 1 For fuses used in enclosures, see 6.5.3, and IEC/TR 62655:2013, 5.1.1.2 and Annex A.
NOTE 2 Therefore where the term "oil" is used in this standard, any appropriate insulating liquid is covered.
Appropriate insulating liquids are those approved by the fuse manufacturer.

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IEC 60282-1:2009/AMD1:2014 – 5 –

© IEC 2014

Table 6 – Limits of temperature and temperature rise for components and materials


Replace Footnote f with the following new footnote:


f Special consideration should be given with regard to vaporisation and oxidation when low-flash-point oil is

used. The given temperature value may be exceeded for transformer-type applications and/or if synthetic or
other suitable insulating liquids are used (see 7.7.3 and IEC 60076-7).





4.8.1 Rated maximum breaking current


Replace the existing title of 4.8.1 by the following new title and remove the first paragraph:
4.8.1 Rated maximum breaking current (I )
1

Table 9 – Standard values of rated TRV – Series I
Replace Table 9 with the following new Table:
Basic parameters Derived values
Rated
Peak Time Time Voltage Time Rate
voltage
a b c
voltage coordinate delay coordinate coordinate of rise
U u t t u’ t’ u /t
r c 3 d c 3
kV kV µs µs kV µs kV/µs
3,6 6,2 40 6 2,06 19,4 0,154
7,2 12,4 52 7,8 4,1 25 0,238
12 20,6 60 9 6,9 29 0,345
17,5 30 72 10,8 10 35 0,415
24 41 88 13,2 13,8 42,5 0,47
36 62 108 16,2 20,6 52 0,57
40,5 69 115 17,2 23 55,5 0,60
52 89 132 19.8 29,5 63.8 0,68
72,5 124 168 8,4 41,5 64 0,74
a
t = 0,15 t for U ≤ 52 kV
d 3 r
and t = 0,05 t for U > 52 kV
d 3 r
b
 u’ = 1/3 u with u = 1,4 × 1,5 2/3 U
c c r
c
t’ = (0,15 + 1/3) t for U ≤ 52 kV
3 r
and t’ = (0,05 + 1/3) t for U > 52 kV
3 r

Figure 4 – Various stages of the striker travel
Replace AB in the key with the following:
AB Further travel during which the specified energy shall be delivered

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– 6 – IEC 60282-1:2009/AMD1:2014

© IEC 2014

Table 11 – Mechanical characteristics of strikers


Replace footnote b with the following new footnote:


b Duration of travel is defined as the time from commencement of arcing to the time when travel OB is reached.

The minimum arcing withstand time of 100 ms (4.15.3) is sufficient to cover this 50 ms plus an additional time
of 50 ms to allow for the switching device operating time.




5.1.1 General

Replace the third paragraph of 5.1.1 with the following new text:

"No tests have been specified to prove the performance of the fuse in the range of currents
below that specified in the breaking tests in 6.6 with respect to its capability to withstand the
current of every possible time/current combination without deterioration leading to either
premature operation or failure (see IEC TR 62655:2013)."

5.1.2 Standard conditions of use
Replace the existing text of 5.1.2 by the following new text:
Testing specified in this standard is intended to demonstrate the suitability of a fuse for use
under the following conditions:
• the a.c. component of current is not higher than the rated maximum breaking current;
• the a.c. component of a current that the fuse is intended to interrupt is not lower than:
– the rated minimum breaking current for a Back-Up fuse;
– the current that causes melting in 1 h for a General-Purpose fuse;
– the rated current for a Full-Range fuse;
• the surrounding temperature is not higher than the maximum application temperature
(MAT) in the case of a Full-Range fuse that has an assigned MAT (with no low current
restriction);
• the highest system voltage is not greater than the rated voltage of the fuse-link, if used in
a three-phase solidly earthed neutral system or low impedance- or low resistance-earthed
neutral system;
• the highest system voltage is not greater than 87 % of the rated voltage of the fuse-link, if
used in a three-phase isolated neutral system or a resonant earthed system, because a

double earth fault (with one fault on the supply side and one fault on the load side of a
fuse on another phase) can occur;
NOTE 1 A higher maximum system voltage than 87 % of the rated voltage of the fuse-link is acceptable when
additional or alternative tests have been performed on the fuse (see IEC/TR 62655:2013, 5.1.3.3 ).
• the highest system voltage is not greater than 87 % of the rated voltage of the fuse-link, if
used on a single-phase system;
NOTE 2 A higher maximum system voltage than 87 % of the rated voltage of the fuse-link is acceptable when
additional or alternative tests have been performed on the fuse (see IEC/TR 62655:2013, 5.1.3.3).
• the prospective transient recovery voltage is within the limits represented by the tests
specified in 6.6.1.2;
• the frequency is between 48 Hz and 62 Hz;
• the power factor is not lower than specified in Table 13;
• the prospective TRV wave, while passing through the delay line and not recrossing it,
does not exceed the reference line with the parameters specified in 6.6.1.2.

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IEC 60282-1:2009/AMD1:2014 – 7 –

© IEC 2014

NOTE 3 As regards the prospective TRV characteristics, the time coordinate t is not significant for the
3

behaviour of fuses (except for those fuses which cause high arc-voltage peaks immediately after arc initiation;
see 6.6.1.2.2).


It is considered that fuses will be capable of breaking correctly any value of prospective

current, irrespective of the possible d.c. component, provided that the preceding requirements

have been met.





6.5.3 Measurement of power dissipation


Replace the first paragraph of 6.5.3 by the following new paragraph:
"Fuses intended for use in enclosures may require derating (see IEC/TR 62655:2013, 5.1.1.2
and Annex A). To facilitate this derating, measurement of the power dissipation shall be made
as follows."

7.7 Oil-tightness tests
Replace the existing title and text of 7.7 by the following new title and text:
7.7 Insulating liquid-tightness tests
7.7.1 General
Two test sequences are specified to demonstrate the liquid-tightness capability of fuses for
applications involving fuses that are intended for use submerged in an insulating liquid. The
first (7.7.2) is intended for applications in which the primary source of heat in an enclosure is
the fuse itself (for example switchgear). The second method (7.7.3) is intended for
applications in which other equipment (for example transformer windings) produce the
majority of the heat in the enclosure. The test requirements are based on historical testing
procedures that have produced good service experience.
Mineral oil has traditionally been used for this testing, but it is recognized that other insulating
liquids, for example silicon fluid, and natural and synthetic esters, can be used in these
applications. Experience has shown that if the tests are conducted with traditional insulating
oil, the results will generally be valid for all insulating liquids that are inert as regards to the
fuse sealing system. The manufacturer shall specify what liquids are appropriate for the test
and the test report shall state the liquid used for the testing.

If several current ratings differing only in their fuse elements are to be evaluated, testing the
fuse-link that has the highest power dissipation is sufficient.
For tests that specify a current, a tolerance from −5 % to +0 % is to be used.
NOTE Attention is drawn to the implementation of appropriate precautions when operating liquids near their
ignition temperature.
7.7.2 Liquid-tightness tests for switchgear type applications
Fuse-links of current-limiting fuses designed to be used immersed in insulating liquid, and
where the primary source of heat is the fuse itself, shall be tested as follows.
The fuse-link shall be immersed in insulating liquid under a pressure of 700 hPa ± 10 %
(above atmospheric pressure).

---------------------- Page: 9 ----------------------
– 8 – IEC 60282-1:2009/AMD1:2014

© IEC 2014

A current equal to the maximum permissible continuous current of the fuse-link I at 80 °C
encl

(see IEC/TR 62655:2013, Annex A) shall be passed through it, and the temperature of the

liquid shall be raised to between 75 °C and 85 °C. This shall be achieved in 2 h to 4 h. The

temperature shall be maintained within this range for a further test period of 2 h with the fuse

carrying current. Supplementary heating and/or cooling of the liquid and/or its container is

normally required to attain and/or maintain the required liquid temperature.


If a fuse-link tested according to Annex E is assigned a maximum application temperature

(MAT) higher than 85 ºC, then the insulating liquid temperature shall, instead, be raised to a

temperature at least equal to the fuse-link’s assigned MAT. The current passed through the
fuse-link shall be the maximum permissible continuous current I for this temperature (see

encl
IEC/TR 62655:2013, Annex A).

The current shall be switched off, any supplementary heating discontinued and the liquid
cooled, or allowed to cool, to a temperature between 15 °C and 30 °C over any convenient
period of time.
This cycle shall be carried out six times and the tank pressure then relieved. The fuse-link
shall then be removed from the liquid, cleaned externally and opened for inspection of the
arc-quenching medium, which shall show no sign of ingress of liquid. See Figure 12 for a
representation of the test sequence.
700 hPa ±10%
Atmospheric
pressure
Tank pressure

6 cycles
75 °C – 85 °C
2h – 4h 2h 2h – 4h
15 °C – 30 °C
Liquid temperature

I
encl

Current through the fuse-link
Supplementary heating/cooling
IEC  1934/14

Figure 12 – Test sequence for switchgear type applications
Current Temperature Pressure

---------------------- Page: 10 ----------------------
IEC 60282-1:2009/AMD1:2014 – 9 –

© IEC 2014

7.7.3 Liquid-tightness tests for transformer type applications


7.7.3.1 General

If a fuse-link is intended for application in a liquid-filled distribution transformer tank, a test
temperature of 115 °C or 140 °C shall be assigned (115 °C for European practice and 140 °C

for North American practice). A fuse tested to 7.7.3 does not have to be tested to 7.7.2 to

demonstrate liquid-tightness. For high temperature applications, where the heat source is not

a transformer winding, the most appropriate temperature (115 °C or 140 °C) should be

chosen.


During the cycling tests detailed in 7.7.3, the fuse-link rate of temperature change should be

no more than 0,5 °C/min and steps should be taken to avoid thermal shock.
The manufacturer shall provide information concerning the assigned temperature (115 °C or
140 °C).
7.7.3.2 Thermal cycle test in liquid
The fuse-link shall be immersed in insulating liquid and the liquid temperature reduced to
−30 °C (+0 °C, −5 °C). One complete cycle consists of raising the liquid temperature to 115 °C
(+5 °C, −0 °C) or 140 °C (+5 °C, −0 °C), and back to −30 °C. When the liquid reaches 115 °C
or 140 °C, current equal to the maximum permissible continuous current of the fuse-link I
encl
for 115 °C or 140 °C (see IEC/TR 62655:2013, Annex A) shall be passed through the fuse
for 2 h. During the 2 h period, the liquid temperature shall be maintained at 115 °C /140 °C
(+5 °C, −0 °C). The time from one temperature extreme to the other shall be any convenient
value as limited by the rate of temperature change specified in 7.7.3.1. The cycle may be
interrupted for any convenient period of time when the liquid temperature is at 20 °C (+10 °C,
−10 °C). There shall be a holding period at −30 °C (+0 °C, −5 °C) of at least two hours.
Current through the fuse may be used as supplementary heating during the heating part of the
cycle.
See Figure 13 for a representation of the test sequence.
This cycle shall be carried out ten times with five fuse-links of the design to be evaluated. The
fuse-links shall be removed from the insulating liquid, cleaned externally and opened for
inspection of the arc-quenching medium, which shall show no sign of ingress of liquid. It
should be noted that more than one fuse-link can be tested in the same liquid filled tank
simultaneously, and on the last cycle, the fuse-link temperature need only be reduced to room
temperature.

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– 10 – IEC 60282-1:2009/AMD1:2014

© IEC 2014



10 cycles
Liquid temperature:
115 °C to 120 °C or

140 °C to 145 °C




2h


Time

Liquid temperature:
2h 2h
−30 °C to −35 °C
Liquid temperature: −30 °C to −35 °C
Liquid temperature
I
encl
Supplementary
heating
(optional)
Time
Current through the fuse-link
Heating
Time
Cooling
Heating/cooling

IEC  1935/14
Figure 13 – Test sequence for combined test for transformer type applications
7.7.3.3 Alternative tests
If it is not convenient to perform the testing as specified in 7.7.3.2 it may be split into two

parts with series a) performed before series b) as follows:
a) Test in air
With the fuse-link in air, its temperature is reduced to −30 °C (+0 °C, −5 °C). One complete
cycle consists of raising the fuse-link temperature to 115 °C (+5 °C, −0 °C) or 140 °C
(+5 °C, −0 °C), and back to −30 °C (+0 °C, −5 °C). The time for each thermal cycle from
one temperature extreme to the other shall be any convenient value, as limited by the rate
of temperature change specified in 7.7.3.1, with a holding period at each temperature
extreme of at least two hours. The cycle may be interrupted for any convenient period of
time when the fuse-link temperature is at 20 °C (+10 °C, −10 °C). Current through the
fuse(s) may be used as a supplemental heat source during the heating cycle. See
Figure 14 for a representation of the test sequence.

Current Temperature

---------------------- Page: 12 ----------------------
IEC 60282-1:2009/AMD1:2014 – 11 –

© IEC 2014



10 cycles

Fuse-link temperature:
115 °C to 120 °C or

140 °C to 145 °C



2h



Time

Fuse-link temperature:
2h 2h
−30 °C to −35 °C
Fuse-link temperature
Time
Current through the fuse-link (optional supplementary heating)
Heating
Time
Cooling
Heating/cooling

IEC  1936/14
Figure 14 − Test sequence for series a) test for transformer type applications
b) Tests in insulating liquid
Each fuse-link from test series a) shall be immersed in insulating liquid. One complete
cycle consists of raising the liquid temperature to 115 °C (+5 °C, −0 °C) or 140 °C (+5 °C,
−0 °C), and back to a temperature of 15 °C to 30 °C. When the insulating liquid reaches

the test temperature, current equal to the maximum permissible continuous current of the
at 115 °C or 140 °C (see IEC/TR 62655:2013, Annex A) shall be passed
fuse-link I
encl
through the fuse for 2 h. During the 2 h period, the liquid temperature shall be maintained
at 115 °C /140 °C (+5 °C, −0 °C). The time from one temperature extreme to the other may
be any convenient value. The cycle may be interrupted for any convenient period of time
when the liquid temperature is at 15 °C to 30 °C. Current through the fuse(s) may be used
as supplementary heating during the heating part of the cycle. See Figure 15 for a
representation of the test sequence.
Both test series shall consist of ten cycles with five fuse-links of the design to be evaluated. It
should be noted that more than one fuse-link can be tested in the same test series
simultaneously, and on the last cycle of series a), the fuse-link temperature need only be
reduced to room temperature.
The fuse-links shall be removed from the liquid, cleaned externally and opened for inspection
of the arc-quenching medium, which shall show no sign of ingress of insulating liquid.
Current Temperature

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– 12 – IEC 60282-1:2009/AMD1:2014

© IEC 2014


Liquid temperature:
115 °C to 120 °C or

140 °C to 145 °C

10 cycles


2h





Time
Liquid temperature: 15 °C to 30 °C
Liquid temperature
Supplementary
heating (optional)
I
encl
Current through the fuse-link Time
Heating
Time
Cooling
Heating/cooling

IEC  1937/14
Figure 15 − Test sequence for series b) test for transformer type applications

9 Application guide

Replace the existing text of Clause 9 by the following new text:
For application information, see those parts of Clause 5 of IEC/TR 62655:2013 that are
applicable to current-limiting fuses.
Explanation: During the course of the making of this amendment to Publication 60282-1,
ed.7.0, also its Clause 9 Application Guide did undergo certain amendments. The technical
contents of that amended Clause 9 has, in the meantime, been incorporated into Clause 5 of
IEC/TR 62655, the Tutorial and application guide for high-voltage fuses, published in May
2013. Hence the decision to delete the content of Clause 9 in the amended 60282-1.

Temperature
Current

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IEC 60282-1:2009/AMD1:2014 – 13 –

© IEC 2014

E.2 General


Replace the third paragraph of E.2 by the following new text:


"Fuses covered by this annex are likely to need derating for typical service conditions (see

IEC/TR 62655:2013, Annex A and consult the manufacturer for information on fuse derating at

surrounding temperatures above 40 °C).





E.6.1 Test practices

Replace, in point c), the text
"All General-Purpose fuses: No additional testing is required (but see 9.3.2)."
by
...