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

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

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Status
Published
Publication Date
21-Jul-2014
Technical Committee
Drafting Committee
Current Stage
DELPUB - Deleted Publication
Completion Date
14-Apr-2020
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IEC 60282-1:2009/AMD1:2014 - Amendment 1 - High-voltage fuses - Part 1: Current-limiting fuses Released:7/22/2014
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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

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

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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

– 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• withdrawn,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:

© 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:

– 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.

© 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 )
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

– 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 c
...

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