Electrical accessories - Circuit-breakers for overcurrent protection for household and similar installations - Part 1: Circuit-breakers for a.c. operation (IEC 60898-1:2015, modified))

IEC 60898-1:2015(E) applies to a.c. air-break circuit-breakers for operation at 50 Hz, 60 Hz or 50/60 Hz, having a rated voltage not exceeding 440 V (between phases), a rated current not exceeding 125 A and a rated short-circuit capacity not exceeding 25 000 A. This second edition cancels and replaces the first edition published in 2002, Amendment 1:2002 and Amendment 2:2003. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) Revision of 9.5 Terminals
b) Revision of the test of glow wire
c) Simplification of the figures for short circuit tests.
The contents of the corrigendum of November 2015 have been included in this copy.

Elektrisches Installationsmaterial - Leitungsschutzschalter für Hausinstallationen und ähnliche Zwecke - Teil 1: Leitungsschutzschalter für Wechselstrom (AC) (IEC 60898-1:2015, modifiziert)

Petit appareillage électrique - Disjoncteurs pour la protection contre les surintensités pour installations domestiques et analogues - Partie 1: disjoncteurs pour le fonctionnement en courant alternatif (IEC 60898-1:2015 , modifiée)

L'IEC 60898-1:2015 s'applique aux disjoncteurs à coupure dans l'air pour courant alternatif à 50 Hz, 60 Hz ou 50/60 Hz, ayant une tension assignée ne dépassant pas 440 V (entre phases), un courant assigné ne dépassant pas 125 A et un pouvoir de coupure assigné ne dépassant pas 25 000 A. Cette deuxième édition annule et remplace la première édition publiée en 2002, Amendement 1:2002 et Amendement 2:2003. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) Révision de 9.5 Bornes
b) Révision de l'essai au fil incandescent
c) Simplification des figures pour les essais de court-circuit.
Le contenu du corrigendum de novembre 2015 a été inclus dans cet exemplaire. La présente version bilingue (2016-11) correspond à la version anglaise monolingue publiée en 2015-03. La version française n'a pas été soumise au vote.

Električni pribor - Odklopniki za nadtokovno zaščito za gospodinjske in podobne inštalacije - 1. del: Odklopniki za izmenični tok (IEC 60898-1:2015, spremenjen)

Standard IEC 60898-1:2015(E) se uporablja za zračne odklopnike za izmenični tok, ki delujejo pri frekvenci 50 Hz, 60 Hz ali 50/60 Hz, pri čemer njihova nazivna napetost ne presega 440 V (med fazami), nazivni tok ne presega 125 A, nazivna kratkostična zmogljivost pa ne presega 25.000 A. Ta druga izdaja razveljavlja in nadomešča prvo izdajo, objavljeno leta 2002, dopolnilo 1:2002 in dopolnilo 2:2003. Ta izdaja je tehnično popravljena izdaja. Ta izdaja vključuje naslednje znatne tehnične spremembe glede na prejšnjo izdajo:
a) revizija poglavja 9.5 Priključki,
b) revizija preskusa žarilne žice,
c) poenostavitev slik za preskuse kratkih stikov.
Vsebina popravka iz novembra 2015 je vključena v tej različici.

General Information

Status
Published
Public Enquiry End Date
30-Jun-2017
Publication Date
24-Feb-2019
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
25-Jan-2019
Due Date
01-Apr-2019
Completion Date
25-Feb-2019

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Electrical accessories - Circuit-breakers for overcurrent protection for household and similar installations - Part 1: Circuit-breakers for a.c. operation (IEC 60898-1:2015, modified))29.120.50Fuses and other overcurrent protection devicesICS:Ta slovenski standard je istoveten z:EN 60898-1:2019SIST EN 60898-1:2019en,fr,de01-april-2019SIST EN 60898-1:2019SLOVENSKI

STANDARDSIST EN 60898-1:2004/IS2:2007SIST EN 60898-1:2004/IS1:2007SIST EN 60898-1:2004/IS4:2007SIST EN 60898-1:2004/IS3:2007SIST EN 60898-1:2004/A13:2012SIST EN 60898-1:2004/A1:2006SIST EN 60898-1:2004SIST EN 60898-1:2004/A12:2008SIST EN 60898-1:2004/A11:20061DGRPHãþD

SIST EN 60898-1:2019
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 60898-1
January 2019 ICS 29.120.50
Supersedes

EN 60898-1:2003, EN 60898-1:2003/IS1:2007, EN 60898-1:2003/IS2:2007, EN 60898-1:2003/IS3:2007, EN 60898-1:2003/IS4:2007

English Version

Electrical accessories - Circuit-breakers for overcurrent protection for household and similar installations - Part 1: Circuit-breakers for a.c. operation (IEC 60898-1:2015 , modified)

Petit appareillage électrique - Disjoncteurs pour la protection contre les surintensités pour installations domestiques et analogues - Partie 1: Disjoncteurs pour le fonctionnement en courant alternatif (IEC 60898-1:2015 , modifiée)

Elektrisches Installationsmaterial - Leitungsschutzschalter für Hausinstallationen und ähnliche Zwecke - Teil 1: Leitungsschutzschalter für Wechselstrom (AC) (IEC 60898-1:2015 , modifiziert) This European Standard was approved by CENELEC on 2018-05-22. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard 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 CEN-CENELEC Management Centre or to any CENELEC member.

This European Standard 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 CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization

Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung CEN-CENELEC Management Centre: Rue de la Science 23,

B-1040 Brussels © 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 60898-1:2018 E SIST EN 60898-1:2019

EN 60898-1:2019 (E) 2 European foreword This document (EN 60898-1:2018) consists of the text of IEC 60898-1:2015 prepared by SC 23E “Circuit-breakers and similar equipment for household use” of IEC/TC 23 “Electrical accessories”, together with the common modifications prepared by CLC/TC 23E “Circuit breakers and similar devices for household and similar applications”. The following dates are fixed: • latest date by which this document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2M19-MT-18 • latest date by which the national standards conflicting with this document have to be withdrawn (dow) 2M24-M5-28 This document supersedes bN 6M898-1:2MM3, bN 6M898-1:2MM3/A1:2MM4, and bN 6M898-1:2MM3/A12:2MM8. Clauses, subclauses, notes, tables, figures and annexes which are additional to those in fbC 6M898-1:2M15 are prefixed ≤Z≤. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CbNbibC shall not be held responsible for identifying any or all such patent rights. This document has been prepared under a mandate given to CbNbibC by the buropean Commission and the buropean cree Trade Association, and supports essential requirements of br airective(s). cor the relationship with br airective(s) see informative Annex ZZ, which is an integral part of this document. Endorsement notice The text of the International Standard IEC 60898-1:2015 was approved by CENELEC as a European Standard with agreed common modifications. SIST EN 60898-1:2019

EN 60898-1:2018 (E)

3 1 Scope Add at the end of the 4th paragraph: …and overvoltage category III. NOTE 1 Additional requirements are necessary for circuit-breakers used in locations having more severe overvoltage conditions. Replace the 6th paragraph by: Circuit-breakers of this standard are suitable for use in IT systems provided that the requirements of HD 60364-4-43 are complied with. Add after this 11th paragraph: Supplementary requirements may be necessary for circuit-breakers of the screw-in types. Renumber NOTE 1 as NOTE 2. After NOTE 1 renumbered as NOTE 2, add: NOTE 3 Recommendations for the dimensional coordination between enclosures and circuit breakers for mounting on rails according to EN 60715 or equivalent means are given in the CENELEC report PD CLC/TR 50473. 2 Normative reference Replace the contents of the clause by: NOTE Normative references to international standards are given in Annex ZB. 3 Terms and definitions Add the following new definitions: 3.2.15 type test test of one or more devices made to a certain design to show that the design meets certain requirements [SOURCE: IEC 60050-441:1984, 441-53-01, modified] 3.2.16 routine test test to which each individual device is subjected during or after manufacture to ascertain whether it complies with certain criteria [SOURCE: IEV 411-53-02, modified] 3.5.15 Replace by: conventional non-tripping current Int specified value of current which the circuit-breaker is capable of carrying for a specified time designated as conventional time, without tripping [SOURCE: IEC 60050-442:1998, 442-05-54] 3.5.16 Add at the end of the clause: [SOURCE: IEC 60050-441:1984, 442-05-55, modified] 3.6.11 Add to the end of the reference of the source: “modified” SIST EN 60898-1:2019

EN 60898-1:2019 (E) 4 4 Classification Replace 4.7 by: 4.7 According to the I2t characteristic Circuit-breakers of B-type and C-type, having rated current up to and including 63 A and having short-circuit breaking capacity of 3 000 A, 4 500 A, 6 000 A and 10 000 A, are classified according to the limits within which their I2t characteristics lie, measured according to 9.12.6 (see Annex ZA). 5 Characteristics of circuit-breakers Replace 5.2.1.3 by: 5.2.1.3 Rated impulse withstand voltage (Uimp) The rated impulse withstand voltage (Uimp) of a circuit-breaker is the value of voltage, assigned by the manufacturer, to which impulse test voltages and clearances are referred. The rated impulse withstand voltage of a circuit-breaker shall be equal to or higher than the standard value of rated impulse withstand voltage given in 5.3.6. NOTE For dimensioning of clearances, for rated impulse withstand voltages higher than the standard value of rated impulse withstand voltage given in 5.3.6, see EN 60664 series. 5.2.2 Delete the note 5.2.4 Replace in the note “Table 17” by “Table 18” 5.3.1 Replace by: 5.3.1 Standard values of rated voltage Standard values of rated voltage are given in Table 1. Replace Table 1 and title by the following: SIST EN 60898-1:2019

EN 60898-1:2018 (E)

5 Table 1 — Standard values of rated voltage Circuit-breakers Circuit supplying the circuit-breaker Rated voltage of circuit-breakers for use in systems 230 V, 230/400 V, 400 V Single pole Single phase (phase to neutral or phase to phase) 230 V Three-phase 4-wire 230 V Single phase (phase to neutral) or three-phase, using 3 single-pole circuit-breakers (3-wire or 4-wire) 230/400 V Two-pole Single phase (phase to neutral or phase to phase) 230 V Single phase (phase to phase) 400 V Three phase (4-wire) 230 V Three-pole Three phase (3-wire or 4-wire) 400 V Four-pole Three phase (4-wire) 400 V NOTE

Wherever in this standard there is a reference to 230 V or 400 V, they may be read as 220 V or 240 V, 380 V or 415 V, respectively. Add after the table: Two-pole circuit breakers rated 230 V may have one or two protected poles. Two-pole circuit breakers rated 400 V shall have two protected poles. Three-pole circuit breakers shall have three protected poles. Four-pole circuit breakers may have three or four protected poles. 5.3.4.1 Add an asterisk “(*)” after 1 500 A. Replace the note by: (*) Only for circuit-breakers incorporated or associated with and in the immediate vicinity of socket-outlets or switches for household and similar applications. 5.3.4.2 Replace by: 5.3.4.2 Standard values above 10 000 A up to and including 25 000 A For values above 10 000 A up to and including 25 000 A the standard values are: 15 000 A, 20 000 A and 25 000 A. The corresponding power factor range is given in 9.12.5. 5.3.5 Table 2 Delete a after 20 In. Delete the note “a For special cases values up to …” SIST EN 60898-1:2019

EN 60898-1:2019 (E) 6 5.3.6 Replace the title and the contents of Table 3 by: Table 3 (void) Replace the first sentence by The standard value of the rated impulse withstand voltage (Uimp) is 4 kV. Replace in the title “Standard values” by “Standard value”. 6 Marking and other product information The text of Clause 6 becomes 6.1 with the following modifications: 6.1 Standard marking Replace the text of f) by: f) rated short-circuit capacity, in A, within a rectangle, without symbol “A”; In h) replace “ambient air” by “calibration”. Replace the text of j) by j) Void Replace the text of k) by: k) (void) Add a new line m) m) energy limiting class in a square in accordance with Annex ZA, if applied. Icn and the energy limiting class, when applied, shall be both on the device and combined; In the first paragraph after l), replace “a), b), c), e), f), h), i), j) and l)” by “a), b), c), f), g), l) and m)”. In the second sentence of this paragraph replace “marking g) may be” by “Marking g) alternatively may be”. Delete Notes 1 and 2. Replace the 5th and 6th paragraphs by: Irrespective of type (B, C or D), the manufacturer shall publish in his literature the I2t characteristic (see 3.5.13). Renumber NOTE 3 in note. After NOTE 3, add a new paragraph For rail mounting circuit-breakers, appropriate rail(s) shall be indicated in manufacturer’s documentation. Add the new subclauses 6.2 and 6.3: 6.2 Additional marking Additional marking to other standards (EN or IEC or other) is allowed under the following conditions: — the circuit-breaker shall comply with all the requirements of the additional standard; — the relevant standard to which the additional marking refers shall be indicated adjacent to this marking and shall be clearly differentiated or separated from the standard marking according to 6.1. Compliance is checked by inspection and by carrying out all the test sequences required by the relevant standard. Equivalent or less severe test sequences need not be repeated. SIST EN 60898-1:2019

EN 60898-1:2018 (E)

7 6.3 Guidance table for marking Marking and other product information Each MCB shall be marked in a durable manner with all or, for small apparatus, part of the following data: Markings may be on the MCB itself Product information in catalogue If, for small devices the space available does not allow all the above data to be marked, at least this information shall be marked and visible when the device is installed. This information may be marked on the side or on the back of the device and be visible only before the device is installed. Alternatively the information may be on the inside of any cover which has to be removed in order to connect the supply wires. Any remaining information not marked shall be given in the manufacturer's catalogues. a)

manufacturer's name or trademark
type designation, catalogue number or serial number
rated voltage, with the symbol ý

rated current without symbol “A” preceded by the symbol of overcurrent instantaneous tripping (B, C or D), for example B 16 X

rated frequency if the circuit-breaker is designed only for one frequency (see 5.3.3)

X f)
rated short-circuit capacity in a rectangle, in amperes, without symbol “A”
X(*)
wiring diagram, unless the correct mode of connection is evident
X X
reference calibration temperature, if different from 30 °C
X i)
the degree of protection (only if different from IP20)
X j)
Void
Void

breaking capacity on one pole of multipole MCBs in case of short-circuit to earth Icn1

m) energy limiting class (e.g. 3) in a square in accordance with Annex ZA, as applicable

X(*)
X(**)
the position of use (symbol according to EN 60051), if necessary;
indication of the terminal for the neutral with “N”
additional marking of performance to other standards

(*) Icn and the energy limiting class, as applicable, shall be both on the device and combined together. (**) The manufacturer shall publish in his literature the I2t characteristic. SIST EN 60898-1:2019

EN 60898-1:2019 (E) 8 7 Standard conditions for operating in service Replace the whole clause by: 7 Standard conditions for operation in service and for installation 7.1 Standard conditions Circuit breakers complying with this standard shall be capable of operating under the standard conditions shown in Table Z.1. Table Z.1 – Standard conditions for operation in service Influencing quantity Standard range of application Reference value Test tolerances f Ambient temperature a g –5 °C to +40 °C b see 9.2

Altitude Not exceeding 2 000 m
Relative humidity maximum value 40 °C 50 % c

External magnetic field Not exceeding 5 times the earth’s magnetic field in any direction Earth’s magnetic field d Position As stated by the manufacturer, with a tolerance of 2° in any direction e As stated by the manufacturer 2° in any direction Frequency Reference value ± 5 % f Rated value

± 5 % Sinusoidal wave distortion Not exceeding 5 % Zero 5 % a The maximum value of the mean daily temperature is +35 °C. b Values outside the range are admissible where more severe climatic conditions prevail, subject to agreement between manufacturer and user. c Higher relative humidities are admitted at lower temperature (for example 90 % at 20 °C). d When a circuit breaker is installed in proximity of a strong magnetic field, supplementary requirements may be necessary. e The device shall be fixed without causing deformation liable to impair its functions. f The tolerances given apply unless otherwise specified in the relevant test. g Extreme limits of –20 °C and +60 °C are admissible during storage and transportation, and should be taken into account in the design of the device. 7.2 Conditions of installation Circuit breakers shall be installed in accordance with the manufacturer’s instructions. 8 Requirements for construction and operation 8.1.2 Delete in paragraph 7, 2nd sentence “without operating handle” Delete Note 1 and replace “NOTE 2 “by “NOTE”. SIST EN 60898-1:2019

EN 60898-1:2018 (E)

9 8.1.3 Clearances and creepage distances Replace the whole subclause 8.1.3 by: 8.1.3 Clearances and creepage distances 8.1.3.1 General The minimum required clearances and creepage distances are given in Table 4 that is based on the circuit-breaker being designed for operating in an environment with pollution degree 2. The insulating materials are classified into material groups on the basis of their comparative tracking index (CTI) according to EN 60664-1. NOTE 1 The comparative tracking index (CTI) is declared by the manufacturer on the basis of tests carried out on the insulating material. NOTE 2 Information on the requirements for design of solid insulation is provided in EN 60664-1. Table 4 — Minimum clearances and creepage distances

Minimum

clearances mm Minimum creepage distancese, f mm Group IIIa h (175 V ≤ CTI < 400 V)d Group II (400 V ≤ CTI < 600 V)d Group I (600 V ≤ CTI)d Rated voltage V Working voltage e V Uimp 4 kV Item/Description 230/400 230 400

> 25 ≤ 50i 120 250 400
> 25 ≤ 50i 120 250 400

> 25 ≤ 50i 120 250 400 1. between live parts which are separated when the main contacts are in the open position a,j 4,0 1,2 2,0 4,0 4,0 0,9 2,0 4,0 4,0 0,6 2,0 4,0 4,0 2. between live parts of different polarity a,j, k 3,0 1,2 1,5 3,0 4,0 0,9 1,5 3,0 3,0 0,6 1,5 3,0 3,0 3. between circuits supplied from different sources, one of which being PELV or SELV g 8,0

3,0 6,0 8,0
3,0 6,0 8,0
3,0 6,0 8,0 SIST EN 60898-1:2019
EN 60898-1:2019 (E) 10

Rated voltage V 230 / 400 230 / 400 230 / 400 4. between live parts and – accessible surfaces of operating means – screws or other means for fixing covers which have to be removed when mounting the circuit–breaker – surface on which the circuit-breaker is mounted b – screws or other means for fixing the circuit-breaker b – metal covers or boxes b – other accessible metal parts c – metal frames supporting flush-type circuit-breakers 3,0 4,0 3,0 3,0 NOTE 1 The values given for 400 V are also valid for 440 V. NOTE 2 The parts of the neutral path, if any, are considered to be live parts. a

For auxiliary and control contacts the values are given in the relevant standard. b

The values are doubled if clearances and creepage distances between live parts of the device and the metallic screen or the surface on which the circuit-breaker is mounted are not dependent on the design of the circuit-breaker only, so that they can be reduced when the circuit-breaker is mounted in the most unfavourable condition. c

Including a metal foil in contact with the surfaces of insulating material which are accessible after installation for normal use. The foil is pushed into corners, grooves, etc., by means of a straight unjointed test finger according to 9.6 (see Figure 8). d

See EN 60112. e

Interpolation is allowed in determining creepage distances corresponding to voltage values intermediate to those listed as working voltage. When interpolating, linear interpolation shall be used and values shall be rounded to the same number of digits as the values picked up from the tables. For determination of creepage distances, see Annex B. f

Creepage distances cannot be less than the associated clearances. g
To cover all different voltages including ELV in an auxiliary contact. h

For material group IIIb (100 V ≤ CTI < 175 V) the values for material group IIIa multiplied by 1,6 apply. i

For working voltages up to and including 25 V reference may be made to EN 60664-1. j

The clearance distances between the metal parts within the arc chamber may be less than 1mm, provided that the sum of distances is greater than prescribed in item 1 of Table 4. k This applies also to clearance and creepage distances between live parts of different polarity of circuit breakers mounted close to one another. 8.1.3.2 Clearances Compliance for item 1 in Table 4 is checked by measurement and by the tests of 9.7.5.4. Compliance for item 2 and 4 in Table 4 is checked by measurement or by the tests of 9.7.5.2. SIST EN 60898-1:2019

EN 60898-1:2018 (E)

11 The clearances of items 2 and 4 (except accessible surface after installation, see Note) may be reduced provided that the measured clearances are not shorter than the minimum allowed in IEC 60664-1 for homogenous field conditions. In this case, compliance for items 2 and 4 is always checked by the test of 9.7.5.2. NOTE Accessible surface after installation means any surface accessible by the user when the circuit-breaker is installed according to the manufacturer's instructions. The test finger can be applied to determine whether a surface is accessible or not. Compliance for item 3 in Table 4 is checked by measurement. 8.1.3.3 Creepage distances Compliance for item 1, 2, 3 and 4 is checked by measurement NOTE All measurements required in 8.1.3 are carried out in Test sequence A on one sample. Tests according to 9.7.2 to 9.7.5 are carried out in Test sequence B on three samples. 8.1.3.4 Solid insulation Compliance is checked by the tests according to 9.7.2, 9.7.3, 9.7.4 and 9.7.5 as applicable. 8.1.4.4 Replace in the last paragraph “parts of electronic devices” by “electronic parts, including circuit boards,” Add a new paragraph at the end of the subclause: Compliance is checked by inspection in accordance with manufacturer's declaration. 8.1.5.2 Delete the note after Table 5. 8.1.5.12 Add a new paragraph at the end of the subclause: Compliance is checked by inspection. 8.1.7.1 Delete from the first paragraph “, the holding in position of which does not depend solely on their plug-in connection(s),» 8.6.1 Table 7 Replace the row for test d by: d B

D 3 In
5 In
10 In
Cold a 0,1 s < t < 45 s (for In ≤ 32 A) 0,1 s < t < 90 s (for In > 32 A)
0,1 s < t < 15 s (for In ≤ 32 A) 0,1 s < t < 30 s (for In > 32 A)

0,1 s < t < 4 sb (for In ≤ 32 A) 0,1 s < t < 8 s (for In > 32 A) Tripping Current established by closing an auxiliary switch In the row for test e delete “b” after “20 In”. SIST EN 60898-1:2019

EN 60898-1:2019 (E) 12 Delete the note in Table 7. Replace the text of b by: b For In ≤ 10 A, t < 8 s is permissible. 8.6.3.3 In 8.6.3.3, add in the first line, after the word “ambient” the word “air”. 8.11 Delete the word “External” in the first line. Replace the last line by: Compliance is checked — for external parts made of insulating material, by the test of 9.15; — for all other parts made of insulating material, by the test sequences, no additional test being required. Add the new subclauses 8.14 and 8.15: 8.14 Electromagnetic immunity Circuit-breakers for overcurrent protection for household and similar installations are not sensitive to normal electromagnetic disturbances and therefore no immunity tests are required. 8.15 Electromagnetic emission Electromagnetic disturbances can only be generated by circuit breakers for overcurrent protection for household and similar installations during occasional switching or automatic breaking operations. The duration of the disturbances is of the order of milliseconds. The frequency, the level and the consequences of these emissions are considered as part of the normal electromagnetic environment of low voltage installations. Therefore the requirements for electromagnetic emissions are deemed to be satisfied and no verification is necessary. 9 Tests 9.1 Add the following new note: NOTE Test to verify compliance of additional marking to 6.2, if any, are carried out according to the relevant standard. 9.2 Delete the note after Table 10. 9.6 Replace the second sentence of the 7th paragraph by: This finger is applied to all places where yielding of insulating material could impair the safety of the circuit- breaker; in the case of knockouts it is applied with a force of 10 N. SIST EN 60898-1:2019

EN 60898-1:2018 (E)

13 9.7 Replace the whole Clause 9.7 by. 9.7 Test of dielectric properties 9.7.1 Resistance to humidity 9.7.1.1 Preparation of the circuit-breaker for test Parts which can be removed without the aid of a tool are removed and subjected to the humidity treatment with the main part; spring lids are kept open during this treatment. Inlet openings, if any, are left open; if knockouts are provided, one of them is opened. 9.7.1.2 Test conditions The humidity treatment is carried out in a humidity cabinet containing air with a relative humidity maintained between 91 % and 95 %. The temperature of the air in which the sample is placed is maintained within ± 1 °C of any convenient value T between 20 °C and 30 °C. Before being placed in the humidity cabinet, the sample is brought to a temperature between T and T +4 °C. 9.7.1.3 Test procedure The sample is kept in the cabinet for 48 h. NOTE 1 A relative humidity between 91 % and 95 % can be obtained by placing in the humidity cabinet a saturated solution of sodium sulphate (Na2SO4) or potassium nitrate (KNO3) in water having a sufficiently large contact surface with the air. NOTE 2 In order to achieve the specified conditions within the cabinet it is necessary to ensure constant circulation of the air within and, in general, to use a cabinet which is thermally insulated. 9.7.1.4 Condition of the circuit-breaker after the test After this treatment, the sample shall show no damage within the meaning of this standard and shall withstand the tests of 9.7.2, 9.7.3, 9.7.4, and 9.7.5.2. 9.7.2 Insulation resistance of the main circuit The circuit-breaker having been treated as specified in 9.7.1 is then removed from the cabinet. After an interval between 30 min and 60 min following this treatment, the insulation resistance is measured 5 s after application of a d.c. voltage of approximately 500 V, in the following order: a) with the circuit-breaker in the open position, between each pair of the terminals which are electrically connected together when the circuit-breaker is in the closed position, in turn on each pole; b) with the circuit-breaker in the closed position, between each pole and the others connected together; c) with the circuit-breaker in the closed position, between all poles connected together and the frame, including a metal foil or part in contact with the outer surface of the housing of insulating material but with the terminal areas kept completely free to avoid flashover between terminals and the metal foil; d) for circuit-breakers with a metal enclosure having an internal lining of insulating material, between the frame and a metal foil in contact with the inner surface of the lining of insulating material, including bushings and similar devices. The measurements a), b) and c) are carried out after having connected all auxiliary circuits to the frame. The term “frame” includes: — all accessible metal parts and a metal foil in contact with the surfaces of insulating material which are accessible after installation as for normal use; SIST EN 60898-1:2019

EN 60898-1:2019 (E) 14 — the surface on which the base of the circuit-breaker is mounted, covered, if necessary, with a metal foil; — screws and other devices for fixing the base to its support; — screws for fixing covers which have to be removed when mounting the circuit-breaker, — metal parts of operating means referred to in 8.2. If the circuit-breaker is provided with a terminal intended for the interconnection of protective conductors, this terminal is connected to the frame. For the measurements according to b), c) and d), the metal foil is applied in such a way that the sealing compound, if any, is effectively tested. The insulation resistance shall be not less than —

9.7.3 Dielectric strength of the main circuit After the circuit-breaker has passed the tests of 9.7.2 the test voltage specified is applied for 1 min between the parts indicated in 9.7.2. The test voltage shall have practically sinusoidal waveform, and a frequency between 45 Hz and 65 Hz. The source of the test voltage shall be capable of supplying a short-circuit current of at least 0,2 A. No overcurrent tripping device of the transformer shall operate when the current in the output circuit is lower than 100 mA. The values of the test voltage shall be as follows: — 2 000 V for items a) to c) of 9.7.2; — 2 500 V for item d) of 9.7.2; Initially, not more than half the prescribed voltage is applied, then it is raised to the full value within 5 s. No flashover or breakdown shall occur during the test. Glow discharges without drop in the voltage are neglected. 9.7.4 Insulation resistance and dielectric strength of auxiliary circuits

Insulation resistance and dielectric strength shall be verified according to a, b and c. a) The measurement of the insulation resistance and the dielectric strength tests for the auxiliary circuits are carried out immediately after the measurement of the insulation resistance and the dielectric strength tests for the main circuit, under the conditions given in b) and c) below. b) The measurements of the insulation resistance are carried out: — between the auxiliary circuits connected to each other and to the frame; — between each of the parts of the auxiliary circuits which might be isolated from the other parts in normal service and the whole of the other parts connected together, at a voltage of approximately 500 V d.c., after this voltage has been applied for 1 min.

c) A substantially sinusoidal voltage at rated frequency is applied for 1 min between the parts listed under b). The voltage values to be applied are specified in Table 13 SIST EN 60898-1:2019

EN 60898-1:2018 (E)

15 Table 13 – Test voltage of auxiliary circuits Rated voltage of auxiliary circuits (a.c. or d.c.) V Test voltage

V Greater than Up to and including

0 30 600 30 50 1 000 50 110 1 500 110 250 2 000 250 500 2 500 At the beginning of the test the voltage shall not exceed half the value specified. It is then increased steadily to the full value in not less than 5 s, but not more than 20 s. During the test, there shall be no flashover or perforation. NOTE 1 Discharges which do not correspond to a voltage drop are disregarded. NOTE 2 In the case of circuit breakers in which the auxiliary circuit is not accessible for verification of the requirements given in b), the tests can be made on samples specially prepared by the manufacturer or according to his instructions. NOTE 3 Auxiliary circuits do not include the control circuit of circuit breakers functionally dependent on line voltage. NOTE 4 Control circuits other than those of secondary circuit of detection transformers and control circuits connected to the main circuit are submitted to the same tests as the auxiliary circuits. 9.7.5 Verification of impulse withstand voltage

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