SIST EN 60947-3:2000/A1:2002
(Amendment)Low-voltage switchgear and controlgear - Part 3: Switches, disconnectors, switch-disconnectors and fuse-combination units
Low-voltage switchgear and controlgear - Part 3: Switches, disconnectors, switch-disconnectors and fuse-combination units
EN following parallel vote
Niederspannungsschaltgeräte - Teil 3: Lastschalter, Trennschalter, Lasttrennschalter und Schalter-Sicherungs-Einheiten
Appareillage à basse tension - Partie 3: Interrupteurs, sectionneurs, interrupteurs-sectionneurs et combinés-fusibles
Nizkonapetostne stikalne in krmilne naprave - 3. del: Stikala, ločilniki, ločilna stikala in stikalni aparati z varovalkami - Dopolnilo 1 (IEC 60947-3:1990/A1:1994)
General Information
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Standards Content (Sample)
SIST EN 60947-3:2000/A1:2002
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SIST EN 60947-3:2000/A1:2002
EUROPEAN STANDARD EN 60947-3/A1
NORME EUROPÉENNE
EUROPÄISCHE NORM April 2001
ICS 29.120.40;29.130.20
English version
Low-voltage switchgear and controlgear
Part 3: Switches, disconnectors, switch-disconnectors
and fuse-combination units
(IEC 60947-3:1999/A1:2001)
Appareillage à basse tension Niederspannungsschaltgeräte
Partie 3: Interrupteurs, sectionneurs, Teil 3: Lastschalter, Trennschalter,
interrupteurs-sectionneurs et Lasttrennschalter und
combinés-fusibles Schalter-Sicherungs-Einheiten
(CEI 60947-3:1999/A1:2001) (IEC 60947-3:1999/A1:2001)
This amendment A1 modifies the European Standard EN 60947-3:1999; it was approved by CENELEC
on 2001-03-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this amendment the status of a national standard without any
alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.
This amendment exists in three official versions (English, French, German). A version in any other language
made by translation under the responsibility of a CENELEC member into its own language and notified to the
Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,
Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway,
Portugal, Spain, Sweden, Switzerland and United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2001 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60947-3:1999/A1:2001 E
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SIST EN 60947-3:2000/A1:2002
EN 60947-3:1999/A1:2001 - 2 -
Foreword
The text of document 17B/1059A/FDIS, future amendment 1 to IEC 60947-3:1999, prepared by
SC 17B, Low-voltage switchgear and controlgear, of IEC TC 17, Switchgear and controlgear, was
submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as amendment A1 to
EN 60947-3:1999 on 2001-03-01.
The following dates were fixed:
– latest date by which the amendment has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2001-12-01
– latest date by which the national standards conflicting
with the amendment have to be withdrawn (dow) 2004-03-01
Annexes designated "normative" are part of the body of the standard.
In this standard, annex ZA is normative.
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of amendment 1:2001 to the International Standard IEC 60947-3:1999 was approved by
CENELEC as an amendment to the European Standard without any modification.
__________
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SIST EN 60947-3:2000/A1:2002
- 3 - EN 60947-3:1999/A1:2001
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
Publication Year Title EN/HD Year
Add:
IEC 60410 1973 Sampling plans and procedures for--
inspection by attributes
IEC 60447 1993 Man-machine interface (MMI) - EN 60447 1993
Actuating principles
Replace IEC 60947-1:1996 by :
IEC 60947-1 (mod) 1999 Low-voltage switchgear and controlgear EN 60947-1 1999
Part 1: General rules
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SIST EN 60947-3:2000/A1:2002
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SIST EN 60947-3:2000/A1:2002
NORME CEI
INTERNATIONALE IEC
60947-3
INTERNATIONAL
1999
STANDARD
AMENDEMENT 1
AMENDMENT 1
2001-03
Amendement 1
Appareillage à basse tension –
Partie 3:
Interrupteurs, sectionneurs, interrupteurs-
sectionneurs et combinés-fusibles
Amendment 1
Low-voltage switchgear and controlgear –
Part 3:
Switches, disconnectors, switch-disconnectors
and fuse-combination units
IEC 2001 Droits de reproduction réservés Copyright - all rights reserved
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http://www.iec.ch
CODE PRIX
Commission Electrotechnique Internationale
Q
PRICE CODE
International Electrotechnical Commission
Pour prix, voir catalogue en vigueur
For price, see current catalogue
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SIST EN 60947-3:2000/A1:2002
60947-3 Amend. 1 IEC:2001 – 3 –
FOREWORD
This amendment has been prepared by subcommittee 17B: Low-voltage switchgear and
controlgear, of IEC technical committee 17: Switchgear and controlgear.
The text of this amendment is based on the following documents:
FDIS Report on voting
17B/1059A/FDIS 17B/1120/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 the base publication and its amendments will
remain unchanged until 2003. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
The contents of the corrigendum of August 2001 have been included in this copy.
___________
Page 3
CONTENTS
Delete "4.8 Vacant" and "4.9 Switching overvoltages".
Page 11
1.1 Scope and object
Delete note 2 and renumber notes 3 and 4 as 2 and 3.
Page 13
1.2 Normative references
Insert, in the list, the following reference:
IEC 60410:1973, Sampling plans and procedures for inspection by attributes
IEC 60447:1993, Man-machine-interface (MMI) – Actuating principles
Replace "IEC 60947-1:1996" by "IEC 60947-1:1999".
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SIST EN 60947-3:2000/A1:2002
60947-3 Amend. 1 IEC:2001 – 5 –
Page 21
4.1 Summary of characteristics
Delete the last dash.
Page 23
4.3.5.2 Rated making capacity
Add, after the second paragraph, the following new paragraph:
Not applicable to AC-20 or DC-20 equipment.
Delete the existing note.
4.3.5.3 Rated breaking capacity
Add, after the second paragraph, the following new paragraph:
Not applicable to AC-20 or DC-20 equipment.
Delete the existing note.
Page 25
4.3.6.2 Rated short-circuit making capacity (l )
cm
Add, after the second paragraph, the following new paragraph:
Not applicable to AC-20 or DC-20 equipment.
Page 27
4.8 Vacant
Delete this subclause.
4.9 Switching overvoltages
Delete this subclause.
Page 29
5.2.1
Replace the existing text of item c) by the following:
Devices of utilization category AC-20A, AC-20B, DC-20A and DC-20B shall be marked "Do
not operate under load", unless the device is interlocked to prevent such operation.
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SIST EN 60947-3:2000/A1:2002
60947-3 Amend. 1 IEC:2001 – 7 –
Page 31
7.1 Constructional requirements
Delete the existing note.
Add the following new subclauses 7.1.1 and 7.1.1.1:
7.1.1 Materials
The suitability of materials used shall be verified with respect to resistance to abnormal heat
and fire by conducting tests:
a) on the equipment; or
b) on sections taken from the equipment; or
c) on samples of identical material having a representative cross-section.
If an identical material having a representative cross-section has already satisfied the
requirements, then those tests need not be repeated.
7.1.1.1 Resistance to abnormal heat and fire
Subclause 7.1.1.1 of IEC 60947-1 applies with the following additions.
Parts of insulating material necessary to retain current-carrying parts in position shall conform
to the glow-wire tests of 8.2.1.1.1 of IEC 60947-1 at a test temperature of 960 °C.
When tests are conducted on material manufacturers samples according to 7.1.1c), they shall
be made according to the tests for flammability and hot wire corresponding to a glow-wire test
of 960 °C as specified in 8.2.1.1.2, and annex M of IEC 60947-1.
7.1.3 Clearances and creepage distances
Replace the existing text by the following:
Subclause 7.1.3 of IEC 60947-1 applies with the following addition:
Guidance on the measurement of clearances and creepage distances is given in annex G of
IEC 60947-1.
Add the following new subclauses 7.1.4, 7.1.4.2 and 7.1.6:
7.1.4 Actuator
Subclause 7.1.4 of IEC 60947-1 applies with the following addition.
7.1.4.2 Direction of movement
The direction of operation for actuators of devices shall normally conform to IEC 60447.
Where devices cannot conform to these requirements, for example due to special applications
or alternative mounting positions, they shall be clearly marked so that there is no doubt as to
the "I" and "O" positions and the direction of operation.
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SIST EN 60947-3:2000/A1:2002
60947-3 Amend. 1 IEC:2001 – 9 –
7.1.6 Additional requirements for equipment suitable for isolation
Subclause 7.1.6 of IEC 60947-1 applies with the following additions.
7.1.6.1 Additional constructional requirements for equipment suitable for isolation
of rated operational voltage greater than 50 V
Replace the existing title and text by the following:
7.1.6.1 Additional constructional requirements for equipment suitable for isolation
The equipment shall be marked according to 5.2.1b).
When no indication of the position of the contacts is provided, for example by the actuator or
a separate indicator, all the main contacts shall be clearly visible in the open position.
The strength of the actuating mechanism and the reliability of the indication of the open
position shall be checked according to 8.2.5. Moreover, when means are provided by the
manufacturer to lock the equipment in the open position, locking shall only be possible when
the main contacts are in the open position (see 8.2.5).
This requirement does not apply to equipment where the main contact position is visible in the
open position and/or the open position is indicated by other means than the actuator.
NOTE Locking in the closed position is permitted for particular applications.
The clearance across the open contacts of the same pole when in the open position shall not
be less than the minimum clearance given in table 13 of IEC 60947-1 and shall also comply
with the requirements of 7.2.3.1b) of IEC 60947-1.
Page 33
7.1.6.3 Supplementary requirements for equipment provided with means
for padlocking the open position
Delete, on page 35, the existing note.
Page 35
Add the following new subclause 7.1.11:
7.1.11 Degrees of protection of enclosed equipment
Degrees of protection of enclosed equipment and relevant tests are given in annex C of
IEC 60947-1.
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SIST EN 60947-3:2000/A1:2002
60947-3 Amend. 1 IEC:2001 – 11 –
Page 37
7.2.3 Dielectric properties
Replace the existing text by the following:
Subclause 7.2.3 of IEC 60947-1 applies with the following additions.
Add the following new subclauses 7.2.3.1 and 7.2.3.2:
7.2.3.1 Impulse withstand voltage
Subclause 7.2.3.1 of IEC 60947-1 applies with the following addition.
Clearances across the open contacts of a device not suitable for isolation shall withstand the
test voltage given in table 12 of IEC 60947-1 appropriate to the rated impulse withstand
voltage.
7.2.3.2 Power-frequency withstand voltage of the main, auxiliary and control circuits
Subclause 7.2.3.2 c) of IEC 60947-1 applies with the following addition.
For equipment suitable for isolation, maximum values of leakage current are specified for all
the test sequences in 8.3.3.5, 8.3.4.3, 8.3.5.4, 8.3.6.4 and 8.3.7.3 respectively.
Page 39
Table 4 – Verification of operational performance – Number of operating cycles
corresponding to the rated operational current
Replace the existing text of the footnote to the table by the following new text:
The values in the table apply to all utilization categories except AC-20A, AC-20B, DC-20A and
DC-20B. These categories shall comply with the total number of operating cycles in columns 5
or 8 without current. Column 2 gives the minimum operating rate. The operating rate for any
utilization category may be increased with the consent of the manufacturer.
Page 41
7.2.6 Switching overvoltages
Replace the existing title and text of this subclause by the following:
7.2.6 Vacant
Page 43
7.3.3.2 Equipment incorporating electronic circuits
Modify the first paragraph on page 45 to read:
These limits are given for mechanical switching devices which are used exclusively in an
industrial environment. When there exists a likelihood of use outside the industrial
environment, the following notice shall be included in the manufacturer's published
information.
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SIST EN 60947-3:2000/A1:2002
60947-3 Amend. 1 IEC:2001 – 13 –
Page 45
8.1.3.1 General
Replace the existing text by the following:
The following tests apply:
− mechanical operation test (see 8.1.3.2);
− dielectric test (see 8.1.3.3).
NOTE If, by the control of materials and manufacturing processes, the integrity of the dielectric properties has
been proven, these tests may be replaced by sampling tests according to a recognized sampling plan (see
IEC 60410).
However, operation of the switch, disconnector, switch-disconnector, or fuse combination unit
during manufacture and/or other routine test may take the place of the tests listed above,
provided the same conditions apply and the number of operations is not less than that
specified.
8.1.3.3 Dielectric test
Replace the first and second sentences of the first paragraph by the following:
The test conditions shall be in accordance with 8.3.3.4.2 2) of IEC 60947-1, except that the
use of metal foil is not required. The value of the test voltage shall be in accordance with that
given in table 12A of IEC 60947-1.
Page 47
8.2 Type tests for constructional requirements
Replace the existing text by the following:
Subclause 8.2 of IEC 60947-1 applies with the following additions.
Add the following new subclause 8.2.4:
8.2.4 Mechanical properties of terminals
Subclause 8.2.4 of IEC 60947-1 applies with the following addition.
Where equipment is designed to be provided with different designs of terminals, the tests
shall be conducted on every design.
8.2.5 Verification of the strength of actuator mechanism and position indicating device
Replace the existing text by the following:
Subclause 8.2.5 of IEC 60947-1 applies with the following additions.
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SIST EN 60947-3:2000/A1:2002
60947-3 Amend. 1 IEC:2001 – 15 –
8.2.5.1 Condition of equipment for tests
Add, after the first paragraph, the following new paragraph:
If different types of actuators exist, either additional or integral, only one design shall be
tested during sequence I. Moreover, the sample representative of the more critical case shall
be tested according to 8.3.3.7.
8.2.5.2 Method of test
Insert, before the existing text, the following new title:
8.2.5.2.1 Dependent and independent manual operation
Add the following new subclauses 8.2.5.2.2 and 8.2.5.2.3:
8.2.5.2.2 Dependent power operation
With the equipment in the closed position, the fixed and moving contacts of the pole for which
the test is deemed to be the most severe shall be fixed together, for example by welding.
The supply voltage to the power operator shall be applied at 110 % of its normal rated value
to attempt to open the contact system of the equipment.
Three attempts to operate the equipment at 5 min intervals by the power operator shall be
made, each for a period of 5 s, unless an associated protective device of the power operator
limits the time to a shorter period.
Verification shall be made according to 8.2.5.3.2.
NOTE In Canada and the United States of America, devices meeting these requirements are not accepted as
assuring isolation themselves.
8.2.5.2.3 Independent power operation
With the equipment in the closed position, the fixed and moving contacts of the pole for which
the test is deemed to be
...
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