SIST EN 60947-1:1999/A1:1999

SLOVENSKI STANDARD
SIST EN 60947-1:1999/A1:1999
01-julij-1999
Low-voltage switchgear and controlgear - Part 1: General rules. Amendment A1
(IEC 60947-1:1996/A1:1997)
Low-voltage switchgear and controlgear -- Part 1: General rules
Niederspannungsschaltgeräte -- Teil 1: Allgemeine Festlegungen
Appareillage à basse tension -- Partie 1: Règles générales
Ta slovenski standard je istoveten z: EN 60947-1:1997/A1:1998
ICS:
29.130.20 Nizkonapetostne stikalne in Low voltage switchgear and
krmilne naprave controlgear
SIST EN 60947-1:1999/A1:1999 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60947-1:1999/A1:1999

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SIST EN 60947-1:1999/A1:1999

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SIST EN 60947-1:1999/A1:1999

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SIST EN 60947-1:1999/A1:1999

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SIST EN 60947-1:1999/A1:1999

NORME CEI


INTERNATIONALE
IEC



INTERNATIONAL
60947-1


1996
STANDARD


AMENDEMENT 1

AMENDMENT 1

1997-12


Amendement 1
Appareillage à basse tension –
Partie 1:
Règles générales
Amendment 1
Low-voltage switchgear and controlgear –
Part 1:
General rules

 IEC 1997 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
H
PRICE CODE
International Electrotechnical Commission
Pour prix, voir catalogue en vigueur
For price, see current catalogue

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SIST EN 60947-1:1999/A1:1999
60947-1 Amend. 1 © IEC:1997 – 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/855/FDIS 17B/873/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.
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Page 3
CONTENTS
Add, on page 7, under annexes, the title of the new annex N:
N Requirements and tests for equipment with protective separation
Page 13
1.2 Normative references
Insert, on page 15, in the existing list, the titles of the following publications:
IEC 60536-2:1992, Classification of electrical and electronic equipment with regard to
protection against electric shock – Part 2: Guidelines to requirements for protection against
electric shock
IEC 60947-5-1:1997, Low-voltage switchgear and controlgear – Part 5-1: Control circuit
devices and switching elements – Electromechanical control circuit devices

Page 89
7.1.4.2 Direction of movement
Replace the text of this subclause by the following new text:
The direction of operation for actuators of devices shall normally conform to IEC 60447. Where
devices cannot conform to these requirements, e.g. due to special applications or alternative
mounting positions, they shall be clearly marked such that there is no doubt as to the "I" and
"O" positions and the direction of operation".

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SIST EN 60947-1:1999/A1:1999
60947-1 Amend. 1 © IEC:1997 – 5 –



7.1.6 Additional constructional requirements for equipment suitable for isolation


Replace the title of this subclause by the following titles:


7.1.6 Additional requirements for equipment suitable for isolation


7.1.6.1 Additional constructional requirements


Page 91


Add, after 7.1.6.1, the following new subclauses:
7.1.6.2 Supplementary requirements for equipment with provision for
electrical interlocking with contactors or circuit-breakers
If equipment suitable for isolation is provided with an auxiliary switch for the purpose of
electrical interlocking with contactor(s) or circuit-breaker(s) and intended to be used in motor
circuits, the following requirements shall apply unless the equipment is rated for AC-23
utilization category.
An auxiliary switch shall be rated according to IEC 60947-5-1 as stated by the manufacturer.
The time interval between the opening of the contacts of the auxiliary switch and the contacts
of the main poles shall be sufficient to ensure that the associated contactor or circuit-breaker
interrupts the current before the main poles of the equipment open.
Unless otherwise stated in the manufacturer's technical literature, the time interval shall be not
less than 20 ms when the equipment is operated according to the manufacturer's instructions.
Compliance shall be verified by measuring the time interval between the instant of opening of
the auxiliary switch and the instant of opening of the main poles under no-load conditions when
the equipment is operated according to the manufacturer's instructions.
During the closing operation the contacts of the auxiliary switch shall close after or
simultaneously with the contacts of the main poles.
A suitable opening time interval may also be provided by an intermediate position (between the
ON an OFF positions) at which the interlocking contact(s) is (are) open and the main poles
remain closed.

7.1.6.3 Supplementary requirements for equipment provided with means for
padlocking the open position
The locking means shall be designed in such a way that it cannot be removed with the
appropriate padlock(s) installed. When the equipment is locked by even of a single padlock, it
shall not be possible by operating the actuator, to reduce the clearance between open contacts
to the extent that it no longer complies with the requirements of 7.2.3.1b).
Alternatively, the design may provide padlockable means to prevent access to the actuator.

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SIST EN 60947-1:1999/A1:1999
60947-1 Amend. 1 © IEC:1997 – 7 –



Compliance with the requirements to padlock the actuator shall be verified using a padlock

specified by the manufacturer or an equivalent gauge, giving the most adverse conditions, to

simulate locking. The force F specified in 8.2.5.2.1 shall be applied to the actuator in an

attempt to operate the equipment from the open position to the closed position. Whilst the force

F is applied the equipment shall be subjected to a test voltage across open contacts. The

equipment shall be capable of withstanding the test voltage required according to table 14

appropriate to the rated impulse withstand voltage.


Page 107


Add a new subclause 7.2.3.7

7.2.3.7 Requirements for equipment with protective separation
Requirements for equipment with protective separation are given in annex N.
Page 125
8.2.5.2.2 Dependent and independent power operation
Replace this subclause by the following new subclauses:
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, e.g 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 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 by 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 the most severe shall be fixed together, e.g by welding.
The stored energy of the power operator shall be released to attempt to open the contact
system of the equipment.
Three attempts to operate the equipment by releasing the st
...