SIST EN 60265-2:1998
(Main)High-voltage switches -- Part 2: High-voltage switches for rated voltages of 52 kV and above
High-voltage switches -- Part 2: High-voltage switches for rated voltages of 52 kV and above
Applicable to three-phase alternating-current switches, having making and breaking current ratings, for indoor and outdoor installations, for rated voltages 52 kV and above, and for rated frequencies up to and including 60 Hz.
Hochspannungs-Lastschalter -- Teil 2: Hochspannungs-Lastschalter für Nennspannungen ab 52 kV und darüber
Interrupteurs à haute tension -- Partie 2: Interrupteurs à haute tension de tension assignée égale ou supérieure à 52 kV
Applicable aux interrupteurs à courant alternatif triphasé ayant des pouvoirs de coupure et de fermeture assignés, prévus pour l'installation à l'intérieur ou à l'extérieur, de tension assignée égale ou supérieure à 52 kV et de fréquence assignée inférieure ou égale à 60 Hz.
High-voltage switches - Part 2: High voltage switches for rated voltages of 52 kV and above (IEC 265-2:1988 + corrigendum Feb.1990)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 60265-2:1998
01-februar-1998
High-voltage switches - Part 2: High voltage switches for rated voltages of 52 kV
and above (IEC 265-2:1988 + corrigendum Feb.1990)
High-voltage switches -- Part 2: High-voltage switches for rated voltages of 52 kV and
above
Hochspannungs-Lastschalter -- Teil 2: Hochspannungs-Lastschalter für
Nennspannungen ab 52 kV und darüber
Interrupteurs à haute tension -- Partie 2: Interrupteurs à haute tension de tension
assignée égale ou supérieure à 52 kV
Ta slovenski standard je istoveten z: EN 60265-2:1993
ICS:
29.120.40 Stikala Switches
29.130.10 Visokonapetostne stikalne in High voltage switchgear and
krmilne naprave controlgear
SIST EN 60265-2:1998 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 60265-2:1998
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SIST EN 60265-2:1998
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SIST EN 60265-2:1998
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SIST EN 60265-2:1998
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SIST EN 60265-2:1998
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SIST EN 60265-2:1998
CEI
NORME
IEC
INTERNATIONALE
265-2
INTERNATIONAL
Première édition
STANDARD
First edition
1988
Interrupteurs à haute tension
Deuxième partie:
Interrupteurs à haute tension de tension assignée
égale ou supérieure à 52 kV
High-voltage switches
Part 2:
High-voltage switches for rated voltages
of 52 kV and above
© CEI 1988 Droits de reproduction réservés — Copyright — all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in
utilisée sous quelque forme que ce soit et par aucun pro- any form or by any means, electronic or mechanical,
cédé, électronique ou mécanique, y compris la photocopie et including photocopying and microfilm, without permission
les microfilms. sans l'accord écrit de l'éditeur. in writing from the publisher.
Genève, Suisse
Bureau Central de la Commission Electrotechnique Internationale 3, rue de Varembé
Commission Electrotechnique Internationale CODE PRIX
International Electrotechnical Commission
PRICE CODE
MewayHapoaHaa 3netsrporexHe9ecnae HoMHccHR
I
Pour prix, voir catalogue en vigueur
For price, see current catalogue
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SIST EN 60265-2:1998
IEC Publication 265-2
Publication 265-2 de la CEI
1988) (First edition - 1988)
(Première édition -
High-voltage switches
Interrupteurs à haute tension
Part 2: High-voltage switches
Deuxième partie: Interrupteurs à haute
for rated voltages of 52 kV and above
tension de tension assignée égale
ou supérieure à 52 kV
CORRIGENDUM 1
Page 6
Préface, après le premier paragraphe, insérer:
Elle constitue la deuxième partie de la CEI 265; elle annule et remplace
la première édition de la CEI 265 (1968) ainsi que la CEI 265 A (1969),
265 B (1969) et 265 C (1970) pour les interrupteurs à haute tension de
tension assignée égale ou supérieure à 52 kV.
Page 7
Preface, after the first paragraph, insert:
It forms Part 2 of IEC 265 and supersedes the first edition of IEC 265
(1968) as well as IEC 265 A (1969), 265 B (1969) and 265 C (1970) for
high-voltage switches for rated voltages of 52 kV and above.
February 1990
Février 1990
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SIST EN 60265-2:1998
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SIST EN 60265-2:1998
265-2 (1) © I E C 3
CONTENTS
Page
FOREWORD 7
PREFACE 7
Clause
1. Scope and object 9
2. Normal and special service conditions 11
3. Definitions 11
3.101 Switch 11
3.102 Switch-disconnector 11
3.103 General-purpose switch 11
3.104 Limited-purpose switch 11
3.105 Special-purpose switch 11
3.106 Single capacitor bank switch 11
3.107 Back-to-back capacitor bank switch 11
3.108 Shunt reactor switch 13
3.109 Breaking capacity 13
3.110 Mainly active load breaking capacity 13
3.111 No-load transformer breaking capacity 13
3.112 Closed-loop breaking capacity 13
3.113 Cable-charging breaking capacity 13
3.114 Line-charging breaking capacity 13
3.115 Bus-bar charging breaking capacity 13
3.116 Single capacitor bank breaking capacity 13
3.117 Back-to-back capacitor bank breaking capacity 13
3.118 Capacitor bank inrush current 13
3.119 Shunt reactor breaking capacity 13
3.120 Earth-fault breaking capacity 15
3.121 Cable and line charging breaking capacity under earth fault conditions 15
3.122 Breaking current 15
3.123 (Peak) making current 15
3.124 Short-circuit making capacity 15
4. Rating 15
4.1 Rated voltage 15
4.2 Rated insulation level 15
4.3 Rated frequency 15
4.4 Rated normal current and temperature rise 15
4.5 Rated short-time withstand current 15
4.6 Rated peak withstand current 15
4.7 circuit Rated duration of short 15
4.8 Rated supply voltage of closing and opening devices and auxiliary circuits 17
4.9 Rated supply frequency of operating devices and auxiliary circuits 17
4.10 Rated pressure of compressed gas supply for operation 17
4.101 Rated mainly active load-breaking current 17
4.102 Rated closed-loop breaking current 17
4.103 Rated no-load transformer breaking current 17
4.104 Rated cable-charging breaking current 17
4.105 Rated line-charging breaking current 17
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265-2 (1) © I E C – 5 –
4.106 Rated single capacitor bank breaking current 17
17
4.107 Rated back-to-back capacitor bank breaking current
19
4.108 Rated capacitor bank inrush making current
19
4.109 Rated shunt reactor breaking current
19
4.110 Rated short-circuit making current
19
4.111 Rated earth fault breaking current
4.112 Rated cable and line-charging breaking current under earth fault conditions 19
19
4.113 Rated mechanical terminal load
4.114 Coordination of rated values for general-purpose switch 19
4.115 Coordination of rated values for limited-purpose and special-purpose switches 21
21
5. Design and construction
21
5.1 Requirements for liquids in high-voltage switches
21
5.2 Requirements for gases in high-voltage switches
21
5.3 Earthing of high-voltage switches
21
5.4 Auxiliary equipment
21
5.5 Dependent power closing
5.6 Stored-energy closing 21
21
5.7 Operation of releases
21
5.8 Low and high pressure interlocking devices
23
5.9 Nameplates
23
5.101 Closing mechanism
23
5.102 Mechanical strength
23
5.103 Position of the movable contact system and its indicating or signalling device
6. Type tests 23
25
6.1 Dielectric tests
Radio interference voltage (RIV) tests 27
6.2
Temperature rise tests 27
6.3
27
6.4 Measurement of the resistance of the main circuit
27
6.5 Short-time withstand current and peak withstand current tests
27
6.101 Making and breaking tests
53
6.102 Mechanical operation tests
55
6.103 Operation under severe ice conditions
55
6.104 Verification of operation during application of rated mechanical terminal loads.
7. Routine tests 57
Power frequency voltage withstand dry tests on the main circuit 57
7.1
7.101 Mechanical operating tests 57
57
8. Guide to the selection of high-voltage switches for service
57
8.101 General
57
8.102 Conditions affecting application
59
8.103 Insulation coordination
59
9. Information to be given with enquiries, tenders and orders
59
9.101 Information to be given with enquiries and orders
9.102 Information to be given with tenders 61
63
10. Rules for transport, storage, erection and maintenance
FIGURES 87
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SIST EN 60265-2:1998
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265-2 (1) © I E C
INTERNATIONAL ELECTROTECHNICAL COMMISSION
HIGH-VOLTAGE SWITCHES
Part 2:
High-voltage switches for rated voltages of 52 kV and above
FOREWORD
The formal decisions or agreements of the I E Con technical matters, prepared by Technical Committees on which all the
1)
National Committees having a special interest therein are represented, express, as nearly as possible, an international
consensus of opinion on the subjects dealt with.
2) They have the form of recommendations for international use and they are accepted by the National Committees in that
sense.
3) In order to promote international unification, the I E C expresses the wish that all National Committees should adopt the
text of the IEC recommendation for their national rules in so far as national conditions will permit. Any divergence
between the I E C recommendation and the corresponding national rules should, as far as possible, be clearly indicated in
the latter.
PREFACE
This standard has been prepared by IEC Sub-Committee 17A: High-voltage switchgear and
controlgear, of IEC Technical Committee No. 17: Switchgear and controlgear.
The text of this standard is based upon the following documents:
on Voting
Six Months' Rule Report
17A(CO)197 I, II 17A(CO)203
Full information on the voting for the approval of this standard can be found in the Voting Repo rt
indicated in the above table.
The following IEC publications are quoted in this standard:
Publications Nos. 50 (441) (1984): International Electrotechnical Vocabulary (IEV), Chapter 441: Switchgear,
controlgear and fuses.
56 (1987): High-voltage alternating-current circuit breakers.
59 (1938): IEC standard current ratings.
71-1(1976): Insulation co-ordination, Pa rt 1: Terms, definitions, principles and rules.
129 (1984): Alternating current disconnectors (isolators) and earthing switches.
137 (1984): Bushings for alternating voltages above 1000 V.
270 (1981): Partial discharge measurements.
694 (1980): Common clauses for high-voltage switchgear and controlgear standards.
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SIST EN 60265-2:1998
265-2 (1) © I E C — 9
HIGH-VOLTAGE SWITCHES
Part 2:
High-voltage switches for rated voltages of 52 kV and above
1. Scope
This standard is applicable to three-phase alternating-current switches, having making and
breaking current ratings, for indoor and outdoor installations, for rated voltages 52kV and
above; and for rated frequencies up to and including 60 Hz.
This standard is also applicable to the operating devices of these switches and to their
auxiliary equipment.
Notes 1. — Switches for gas insulated switchgear are covered by this standard.
2. — Switches having a disconnecting function and called switch-disconnectors are also covered by IEC
Publication 129.
3. — Earthing switches are not covered by this standard. Earthing switches forming an integral pa rt of a switch
are covered by IEC Publication 129.
1.101 Object
The main object of this standard is to establish requirements for switches used in
transmission and dist ribution systems. General-purpose switches for this application shall
comply with the following service applications:
— carrying rated normal current continuously;
— carrying short-circuit currents for a specified time;
— switching of mainly active loads;
— switching of no-load transformers;
— switching of the charging current of unloaded cables, overhead lines or busbars;
— switching of closed-loop circuits;
— making short-circuit currents.
A further object of this standard is to establish requirements for limited-purpose and special-
purpose switches used in transmission and dist ribution systems.
Limited-purpose switches shall comply with one or more of the se rvice applications indicated
above.
Special-purpose switches may comply with one or more of the se rvice applications indicated
above and, in addition, shall be suitable for one or more of the following applications:
switching single capacitor banks;
—
— switching back-to-back capacitor banks;
— switching shunt reactors including secondary or tertiary reactors switched from the primary
side of the transformer;
— applications requiring an increased number of operating cycles;
— switching under earth fault conditions in systems with isolated neutral or in resonant earthed
systems.
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SIST EN 60265-2:1998
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265-2 (1) © I E C
2. Normal and special service conditions
IE C Publication 694 is applicable.
3. Definitions
For the definitions of general terms used in this standard, reference is made to the IEC
Publications 50 (441) and 71-1.
3.101 Switch (441-14-10)
A switching device capable of making, carrying and breaking currents under normal circuit
conditions, which may include specified operating overload conditions and also carrying for a
specified time currents under specified abnormal circuit conditions, such as those of short-
circuit.
3.102 Switch-disconnector (441-14-12)
A switch which, in the open position, satisfies the isolating requirements specified for a
disconnector.
3.103 General-purpose switch
A switch capable of performing, with currents up to its rated breaking currents, all making
and breaking operations which may normally occur. The switch shall also be capable of
carrying and making short-circuit currents.
Note. — Refer to Sub-clause 4.114 for specific ratings of a general-purpose switch.
3.104 Limited purpose switch
A switch which complies with one or more, but not with all, service applications of a general-
purpose switch.
3.105 Special-purpose switch
A switch suitable for switching requirements other than those specified for a géneral-purpose
switch.
Examples of such requirements are capacitor bank switching, shunt reactor switching, switching under
Note. —
earth fault conditions, and a capability of an increased number of operating cycles.
3.106 Single capacitor bank switch
A special-purpose switch intended for switching of a single capacitor bank with charging
currents up to its rated single capacitor bank breaking current.
3.107 Back-to-back capacitor bank switch
A special-purpose switch intended for breaking capacitor bank-charging currents, with one
or more capacitor banks connected to the bus or supply side of the switch, up to its rated back-
to-back capacitor bank breaking current. The switch shall be capable of making the associated
inrush current, up to its rated capacitor bank inrush making current.
3.108
Shunt reactor switch
A special-purpose switch intended for switching a shunt reactor, including secondary or
tertiary reactors switched from the primary side of the transformer.
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3.109 Breaking capacity* (441-17-08)
3.110 Mainly active load breaking capacity
The breaking capacity when opening a mainly active load circuit in which the load can be
represented by resistors and reactors in parallel.
3.111 No-load transformer breaking capacity
The breaking capacity when opening a no-load transformer circuit.
3.112
Closed-loop breaking capacity
The breaking capacity when opening a closed transmission line loop circuit, or a transformer
in parallel with one or more transformers, i. e. , a circuit in which both sides of the switch remain
energized after breaking, and in which the voltage appearing across the terminals is
substantially less than the system voltage.
3.113 Cable-charging breaking capacity
The breaking capacity when opening a cable circuit at no load.
3.114 Line-charging breaking capacity
The breaking capacity when opening an overhead line circuit at no load.
3.115
Busbar charging breaking capacity
The breaking capacity when opening a busbar circuit at no load.
3.116 Single capacitor bank breaking capacity
The breaking capacity when opening a single capacitor bank circuit connected to a supply
that does not include another capacitor bank adjacent to the bank being switched.
3.117 Back-to-back capacitor bank breaking capacity
The breaking capacity when opening a capacitor bank circuit connected to a supply that
includes one or more capacitor banks adjacent to the bank being switched.
3.118 Capacitor bank inrush making current
The high frequency and high magnitude current occurring when closing a capacitor bank
circuit onto a supply including one or more capacitor banks adjacent to the bank being
switched.
Note. — The frequency and magnitude of the inrush current depend upon the values of capacitance and the values of
the inductance between the capacitor banks.
3.119 Shunt reactor breaking capacity
The breaking capacity when opening a shunt reactor circuit, including secondary or tertiary
reactors switched from the primary side of the transformer.
* Note concerning the rated values:
In English, the terms "rated making current" and "rated breaking current" are being used where formerly "rated
making capacity" and "rated breaking capacity" were used, the intended meaning being adequately conveyed by the
use of "rated". In French, the terms "pouvoir de fermeture assigné" and "pouvoir de coupure assigné" continue to be
used.
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3.120 Earth fault breaking capacity
The breaking capacity in the faulty phase of an isolated neutral or resonant earthed system
when clearing an earth fault on an unloaded cable or overhead line on the load side of the
switch.
3.121 Cable and line charging breaking capacity under earth fault conditions
The breaking capacity in the sound phases of an isolated neutral or resonant earthed system
when switching off an unloaded cable or overhead line, with an earth fault on the supply side of
the switch.
3.122 Breaking current (441-17-07)
3.123 (Peak)-making current
The peak value of the first major loop of the current in a pole of a switch during the transient
period following the initiation of current during a making operation.
Notes 1. — The peak value may differ from one pole to another and from one operation to another as it depends on
the instant of current initiation relative to the wave of the applied voltage.
2. — Where, for a polyphase circuit, a single value of (peak) making current is referred to, it is, unless
otherwise stated, the highest value in any phase.
3.124 Short-circuit making capacity (441-17-10)
4.
Rating
Clause 4 of IEC Publication 694 is app licable with the additions and exceptions indicated
below.
4.1
Rated voltage
Sub-clause 4.1 of I E C Publication 694 is applicable.
4.2 Rated insulation level
Sub-clause 4.2 of I E C Publication 694 is applicable.
4.3 Rated frequency
Sub-clause 4.3 of I E C Publication 694 is applicable.
4.4 Rated normal current and temperature rise
Sub-clause 4.4 of I E C Publication 694 is applicable.
4.5 Rated short-time withstand current
Sub-clause 4.5 of I E C Publication 694 is applicable.
4.6 Rated peak withstand current
Sub-clause 4.6 of I E C Publication 694 is applicable.
4.7 Rated duration of short-circuit
Sub-clause 4.7 of IE C Publication 694 is applicable.
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4.8 Rated supply voltage of closing and opening devices and auxiliary circuits
Sub-clause 4.8 of I E C Publication 694 is applicable.
4.9 Rated supply frequency of operating devices and auxiliary circuits
Sub-clause 4.9 of I E C Publication 694 is applicable.
4.10 Rated pressure of compressed gas supply for operation
Sub-clause 4.10 of IEC Publication 694 is applicable.
4.101 Rated mainly active load-breaking current*
The rated mainly active load-breaking current is the maximum mainly active load current
that the switch shall be capable of breaking at its rated voltage.
4.102 Rated closed-loop breaking current *
The rated closed-loop breaking current is the maximum closed-loop current the switch shall
be capable breaking. Separate ratings for transmission line loop current and parallel
of
transformer current may be assigned.
4.103 Rated no-load transformer breaking current*
The rated no-load transformer breaking current is the maximum no-load transformer
current the switch shall be capable of breaking at its rated voltage.
4.104 Rated cable-charging breaking current*
The rated cable-charging breaking current is the maximum cable-charging current that the
switch shall be capable of breaking at its rated voltage.
4.105 Rated line-charging breaking current *
The rated line-charging breaking current is the maximum line-charging current that the
switch shall be capable of breaking at its rated voltage.
4.106 Rated single capacitor bank breaking current*
The rated single capacitor bank breaking current is the maximum capacitor bank breaking
current that the switch shall be capable of breaking at its rated voltage with no capacitor bank
connected to the supply side of the switch adjacent to the bank being switched.
4.107 Rated back-to-back capacitor bank breaking current*
The rated back-to-back capacitor bank breaking current is the maximum capacitor bank
breaking current that the switch shall be capable of breaking at its rated voltage with one or
more capacitor banks connected on the supply side of the switch adjacent to the bank being
switched, such as to produce the rated capacitor bank inrush making current.
* Note concerning the rated values:
In English. the terms "rated making current" and "rated breaking current" are being used where formerly "rated
making capacity" and "rated breaking capacity" were used, the intended meaning being adequately conveyed by the
use of "rated". In French, the terms "pouvoir de fermeture assigné" and "pouvoir de coupure assigné" continue to be
used.
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4.108
Rated capacitor bank inrush making current *
The rated capacitor bank inrush making current is the peak value of the current that the
switch shall be capable of making at its rated voltage and with a frequency of the inrush current
appropriate to the service conditions.
The assignment of a rated capacitor bank inrush making current is mandatory for switches
that have a rated back-to-back capacitor bank breaking current.
Note. —
The frequency of the inrush current for back-to-back capacitor banks may be in the range of 2 kHz to
30 kHz. The specific values are dependent upon the size and con figuration of the capacitor bank being
switched, the supply side capacitor bank and the inclusion of limiting impedances, if any.
4.109 Rated shunt reactor breaking current*
The rated shunt reactor breaking current is the maximum shunt reactor current that the
switch shall be capable of breaking at its rated voltage.
Note. —
The minimum shunt reactor breaking current, if other than zero, that the switch is capable of breaking
should be specified by the manufacturer.
4.110
Rated short-circuit making current*
The rated short-circuit making current is the maximum peak prospective current that the
switch shall be capable of making at its rated voltage.
4.111 Rated earth fault breaking current *
The rated earth fault breaking current, for an isolated neutral or resonant earthed system, is
the maximum earth fault current in the faulted phase that the switch shall be capable of
breaking at its rated voltage.
Note. —
The TRV of an isolated neutral system is more severe than the TRV of a resonant earthed system, even if
detuned.
4.112
Rated cable and line-charging breaking current under earth fault conditions *
The rated cable and line-charging breaking current under earth fault conditions, for an
isolated neutral or resonant earthed system, is the current in the sound phases that the switch
shall be capable of breaking at its rated voltage.
Note. —
The maximum cable and line-charging current under fault conditions is times the cable and line charging
f
current occurring in normal conditions. This covers the most severe case, which occurs with individually
screened cables.
4.113
Rated mechanical terminal load
Sub-clause 4.103 of IEC Publication 129 is applicable.
4.114
Co-ordination of rated values for a general-purpose switch
A general-purpose switch shall have specific ratings for each switching duty as follows:
—
rated mainly active load breaking current shall be equal to the rated normal current;
—
rated no-load transformer breaking current shall be equal to 1.0% of the rated normal
current;
* Note concerning the rated values:
In English, the terms "rated making current" and "rated breaking current" are being used where formerly "rated
making capacity" and "rated breaking capacity" were used, the intended meaning being adequately conveyed by the
use of "rated". In French, the terms
"pouvoir de fermeture assigné" and "pouvoir de coupure assigné" continue to be
used.
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SIST EN 60265-2:1998
265-2 (1) © I E C — 21 —
— rated transmission line loop breaking current shall be equal to the rated normal current;
— rated parallel transformer breaking current shall be equal to 50% of the rated normal
current;
— rated cable-charging breaking current shall be as shown in Table I;
— rated line-charging breaking current shall be as shown in Table I;
— the rated short-circuit making current shall be equal to the rated peak withstand current.
The standard values of ratings should be selected from the R10 series specified in I E C
Publication 59.
Notes 1. — Specific co-ordination between rated normal current and rated voltage is not a requirement of this
standard.
2. — Specific co-ordination between rated normal current and short-time withstand current is not a
requirement of this standard.
4.115 Co-ordination of rated values for limited purpose and special-purpose switches
A limited-purpose switch should preferably have the same specific ratings as those for a
general-purpose switch, where such ratings are applicable. If other ratings are specified, values
from the R10 series should be selected.
A special-purpose switch is not required to have coordinated ratings. The rated values,
however, should be selected from the R10 series specified in I E C Publication 59.
5.
Design and construction
Clause 5 of IEC Publication 694 is applicable with the additions indicated below.
5.1 Requirements for liquids in high-voltage switches
Sub-clause 5.1 of I E C Publication 694 is applicable.
5.2 Requirements for gases in high-voltage switches
Sub-clause 5.2 of IEC Publication 694 is applicable.
5.3 Earthing of high-voltage switches
Sub-clause 5.3 of I E C Publication 694 is applicable.
5.4
Auxiliary equipment
Sub-clause 5.4 of IEC Publication 694 is applicable.
5.5
Dependent power closing
Sub-clause 5.5 of IEC Publication 694 is applicable.
5.6 Stored energy closing
Sub-clause 5.6 of IEC Publication 694 is applicable.
5.7 Operation of releases
Sub-clause 5.7 of IEC Publication 694 is applicable.
5.8 Low and high pressure interlocking devices
Sub-clause 5.8 of IEC Publication 694 is applicable.
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SIST EN 60265-2:1998
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5.9 Nameplates
Sub-clause 5.9 of IEC Publication 694 is applicable. Switches and their operating devices
shall be provided with nameplates which contain information in accordance with Table II.
5.101 Closing mechanism
For switches having a short-circuit making current rating, only switches having stored energy
closing or dependent power closing mechanisms are allowed.
5.102 Mechanical strength
Switches shall be capable of bearing the rated mechanical terminal load when installed
according to the manufacturer's instructions, as well as electromagnetic forces, without
reduction of their reliability or current carrying capacity.
5.103 Position of the movable contact system and its indicating or signalling device
5.103.1 Securing the position
Switches, including their operating devices, shall be so constructed that they cannot come
out of their open or closed positions by forces arising from gravity, vibration, reasonable shocks
or accidental touching of the connecting rods of their operating devices, or by electromagnetic
forces. Switches or their operating devices shall be designed to allow the application of means
to prevent unauthorized operation.
5.103.2 Indication of position
The open and closed positions of the switches shall be clearly indicated. This requirement is
met if one of the following conditions is fulfilled:
a) the gap or isolating distance is visible;
b) the position of each movable contact is indicated by a reliable indicating device.
rve as the indicating device.
Notes 1. — A visible moving contact may se
2. — In the case where all poles of a switch are so coupled as to be operated as a single unit, it is permissible to
use a common indicating device.
5.103.3 Auxiliary contacts for signalling
Signalling of the closed position shall not take place until it is ce rtain that the movable
contacts will reach a position in which the rated normal, peak withstand, and short-time
withstand currents can be carried safely.
Signalling of the open position shall not take place until the movable contacts have reached a
position such that the corresponding gap or isolating distance is at least 80% of the total
isolating distance, or until it is ce rtain that the movable contacts will reach their fully open
position.
6.
Type tests
The type tests are for the purpose of proving the characteristics of high-voltage switches,
their operating devices and their auxiliary equipment.
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SIST EN 60265-2:1998
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Type tests include:
a) normal
type tests:
— dielectric tests including lightning and switching impulse tests, power-frequency voltage
withstand tests, and power-frequency voltage withstand tests on auxiliary and control
circuits;
— temperature-rise tests;
— measurement of the resistance of the main circuit;
— short-time withstand current and peak withstand current tests;
— tests to prove the ability of the switch to make and break the specified current
...
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