IEC 62873-3-1:2020 is available as IEC 62873-3-1:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 62873-3-1:2020 applies to devices equipped with screwless-type terminals for current not exceeding 40 A, primarily suitable for connecting unprepared copper conductors of cross‑section up to 10 mm2. This second edition cancels and replaces the first edition published in 2016. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- Modification of scope to cover screwless-type terminals up to 40 A;
- Modification of scope to address other devices in addition to RCDs;
- Modification of Table 1 to cover rated currents up to 40 A;
- Modification of 8.1 so that IEC 62873-3-1 can be referred to by other product standards in addition to those for RCDs;
- Modification of 9.1 so that IEC 62873-3-1 can be referred to by other product standards in addition to those for RCDs.

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IEC 62873-3-2:2020 is available as IEC 62873-3-2:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 62873-3-2:2020 applies to devices equipped with flat quick-connect terminations consisting of a male tab with nominal width 6,3 mm and thickness 0,8 mm, to be used with a mating female connector for connecting electrical copper conductors according to the manufacturer's instructions, for rated currents up to and including 16 A. This second edition cancels and replaces the first edition published in 2016. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- Modification of the scope to address other devices in addition to RCDs;
- Modification of 8.1 so that IEC 62873-3-2 can be referred to by other product standards in addition to those for RCDs;
- Modification of 9.1 so that IEC 62873-3-2 can be referred to by other product standards in addition to those for RCDs.

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This part of IEC 60282 applies to all types of high-voltage current-limiting fuses designed for
use outdoors or indoors on alternating current systems of 50 Hz and 60 Hz and of rated
voltages exceeding 1 000 V.

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This part of IEC 60282 applies to expulsion fuses complying with IEC 60282-2 and specifies
additional testing requirements for fuses employing a cutout fuse-base that utilizes polymeric
insulators.

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2020-01-09: TC 23E requests BT to decouple the EN from the EMC Directive and publish the standard without delay -  to offer for LVD: partial compliance but all remarks have been implemented.
2019-10-01: CLC/TC 23E and CLC/TC 210 to coordinate to address the statistical methods.

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This part of IEC 61643 specifies standard test circuits and methods for thyristor surge
suppressor (TSS) components. These surge protective components, SPCs, are specially
formulated thyristors designed to limit overvoltages and divert surge currents by clamping and
switching actions. These SPCs are used in the construction of surge protective devices
(SPDs) and equipment used in Information & Communications Technologies (ICT) networks
with voltages up to AC 1 000 V and DC 1 500 V. This document is applicable to gated or nongated
TSS components with third quadrant (-v and –i) characteristics of blocking, conducting
or switching.
This document contains information on
• terminology;
• letter symbols;
• essential ratings and characteristics;
• rating verification and characteristic measurement;
This document does not apply to the conventional three-terminal thyristors as covered by
IEC 60747-6.

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This document describes the principles for selection, installation and coordination of SPDs intended for use in Photovoltaic (PV) systems up to 1500 V DC and for the AC side of the PV system rated up to 1000 V rms 50/60 Hz.
The photovoltaic installation extends from a PV array or a set of interconnected PV-modules to include the associated cabling and protective devices and the converter up to the connection point in the distribution board or the utility supply point.
This document considers SPDs used in different locations and in different kinds of PV systems:
-   PV systems located on the top of a building;
-   PV systems located on the ground like free field power plants characterized by multiple earthing and a meshed earthing system.
The term PV installation is used to refer to both kinds of PV systems. The term PV power plant is only used for extended free-field multi-earthed power systems located on the ground.
For PV installations including batteries additional requirements could be necessary.
NOTE 1   The HD 60364 series, EN 62305 series and CLC/TS 61643 12 also apply.
NOTE 2   This document deals only with SPDs and not with surge protective components integrated inside equipment (e.g. inverters, (PCE) power conversion equipment).

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In addition to the general requirements of IEC 60077-2, this part of IEC 60077 gives rules for
AC circuit-breakers, the main contacts of which are connected to AC overhead contact lines;
the nominal voltage of these circuits being in accordance with IEC 60850.
This document, together with IEC 60077-2, states specifically:
a) the characteristics of the circuit-breakers;
b) the service conditions with which circuit-breakers comply with reference to:
– operation and behaviour in normal service;
– operation and behaviour in short-circuit;
– dielectric properties;
c) the tests for confirming the compliance of the components with the characteristics under
the service conditions and the methods to be adopted for these tests;
d) the information to be marked on, or given with the circuit-breaker.
NOTE 1 Circuit-breakers which are dealt with in this document can be provided with devices for automatic
opening under pre-determined conditions other than those of overcurrent, for example, undervoltage and reversal
of power flow direction. This document does not deal with the verification of operation under such predetermined
conditions.
NOTE 2 The incorporation of electronic components or electronic sub-assemblies into electrotechnical components
is now common practice.
Although this document is not applicable to electronic equipment, the presence of electronic components does not
provide a reason to exclude such electrotechnical components from the scope.
Electronic sub-assemblies included in the circuit-breakers comply with the relevant standard for electronics
(IEC 60571).
NOTE 3 Certain of these rules, after agreement between the user and the manufacturer, are used for
electrotechnical components installed on vehicles other than rail rolling stock such as mine locomotives,
trolleybuses, etc. In this case, particular additional requirements can be necessary.
This document does not cover industrial circuit-breakers which comply with IEC 62271-100.
For these, in order to ensure satisfactory operation, this document is used to specify only the
particular requirements for rolling stock. In such cases, a specific document states the
additional requirements with which the industrial circuit-breakers comply, for example:
– either to be adapted (e.g. for control voltage, environmental conditions, etc.);
– or to be installed and used so that they do not have to endure specific rolling stock
conditions;
– or to be additionally tested to prove that these components can withstand satisfactorily the
rolling stock conditions.

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The purpose of NEN-EN-IEC 60077-5 is to give additional or amended rules for high voltage (HV) fuses as a supplement to those given by IEC 60077-2. The high voltage fuses concerned are those connected into power and/or auxiliary circuits. The nominal voltage of these circuits lies between 600 V DC and 3 000 V DC, according to IEC 60850. These fuses can also be used in auxiliary AC circuits up to a nominal voltage of 1500 V. This document together with IEC 60077-2 states specifically: a) the characteristics of the fuses; b) the service conditions with which the fuses comply with reference to: - operation and behaviour in normal service; - operation and behaviour in case of short circuit; - dielectric properties. c) the tests intended for confirming the compliance of the fuse with the characteristics under the service conditions and the methods adopted for these tests; d) the information marked on, or given with, the fuse. This document does not cover parallel connection of fuses. During preparation of this document, IEC 60269-1 and IEC 60282-1 have been considered and their requirements have been kept as far as possible. This document makes reference to the general rules for electrotechnical components given in IEC 60077-2, but for general conditions reference is made directly to IEC 60077-1.

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In addition to the general requirements of NEN-EN-IEC 60077-2, NEN-EN-IEC 60077-3 gives the rules for circuit-breakers, the main contacts of which are connected to DC power and/or auxiliary circuits. The nominal voltage of these circuits does not exceed 3 000 V DC according to IEC 60850. This part of IEC 60077, together with IEC 60077-2, states specifically: a) the characteristics of the circuit-breakers; b) the service conditions with which circuit-breakers complies with reference to: - operation and behaviour in normal service; - operation and behaviour in the case of short circuit; - dielectric properties; c) the tests for confirming the compliance of the components with the characteristics under the service conditions and the methods to be adopted for these tests; d) the information to be marked on, or given with, the circuit breaker.

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EN-IEC 61643-331 is a test specification for metal oxide varistors (MOV), which are usedfor applications up to 1 000 V AC or 1 500 V DC in power lines, or telecommunication, orsignalling circuits. They are designed to protect apparatus or personnel, or both, from hightransient voltages.This document applies to MOVs having two electrodes and hybrid surge protectioncomponents. This document also does not apply to mountings and their effect on the MOV’scharacteristics. Characteristics given apply solely to the MOV mounted only in the waysdescribed for the tests.

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IEC 62020-1:2020 applies to residual current monitors for household and similar purposes, having rated operational voltages and a rated voltage of the monitored circuit not exceeding 440 V AC and rated currents not exceeding 125 A.
This first edition cancels and replaces IEC 62020:1998 and IEC 62020:1998/AMD1:2003. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
– definition of Type F and Type B RCM;
– marking of Type F and Type B RCM;
– introduction of a new subclause,  REF _Ref521411992 \r \h \* MERGEFORMAT 8.20 08D0C9EA79F9BACE118C8200AA004BA90B02000000080000000E0000005F005200650066003500320031003400310031003900390032000000 ;
– modification of  REF _Ref521412027 \r \h \* MERGEFORMAT 9.7 08D0C9EA79F9BACE118C8200AA004BA90B02000000080000000E0000005F005200650066003500320031003400310032003000320037000000 ;
– update of  REF _Ref521412044 \r \h \* MERGEFORMAT 9.9 08D0C9EA79F9BACE118C8200AA004BA90B02000000080000000E0000005F005200650066003500320031003400310032003000340034000000 ;
– modification of  REF _Ref521412054 \r \h \* MERGEFORMAT 9.14 08D0C9EA79F9BACE118C8200AA004BA90B02000000080000000E0000005F005200650066003500320031003400310032003000350034000000 ;
– modification of  REF _Ref521412067 \r \h \* MERGEFORMAT 9.19 08D0C9EA79F9BACE118C8200AA004BA90B02000000080000000E0000005F005200650066003500320031003400310032003000360037000000 , for introduction of the relevant test for Type F and Type B RCM.
The contents of the corrigendum of July 2020 have been included in this copy.

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IEC 60282-4:2020 applies to expulsion fuses complying with IEC 60282-2 and specifies additional testing requirements for fuses employing a cutout fuse-base that utilizes polymeric insulators.

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IEC 60282-1:2020 applies to all types of high-voltage current-limiting fuses designed for use outdoors or indoors on alternating current systems of 50 Hz and 60 Hz and of rated voltages exceeding 1 000 V.
This eighth edition cancels and replaces the seventh edition published in 2009.
This edition includes the following significant technical changes with respect to the previous edition:
– additional information concerning thermally operated strikers;
– the division of ratings, characteristics and type tests into those applicable to all fuses and those applicable to particular fuse-link types and applications;
– adjustment of Series II voltages and tests to meet present North American standard system voltages and applications;
– clarification of requirements for fuse-links used in surrounding temperatures above 40 °C; and
– clarification of homogeneous requirements for fuse-links containing one element.

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This project will implement some changes to EN 50310:2016.

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The contents of the corrigendum of March 2020 have been included in this copy.

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This document is applicable to mechanical switching devices designed as "circuit-breakers for equipment" (CBE) for household and similar applications. CBEs according to this document are intended to provide protection to circuits within electrical equipment including its components (e.g. motors, transformers, internal wiring). This document covers also CBEs applicable for protection of electrical equipment in case of undervoltage and/or overvoltage. This document also covers CBEs which are suitable for isolation. CBEs are not applicable for overcurrent protection of wiring installations of buildings. CBEs according to this document have: - a rated voltage not exceeding 440 V AC (between phases) and/or DC not exceeding 250 V; - a rated current not exceeding 125 A; - a short-circuit capacity (Icn) of at least 6 × In (AC types) and 4 × In (DC types) but not exceeding 3 000 A. CBEs may have a conditional short-circuit current (Inc) rating in association with a specified short-circuit protective device (SCPD). A guide for coordination of a CBE associated in the same circuit with a SCPD is given in Annex F. For CBEs having a degree of protection higher than IP20 according to IEC 60529, for use in locations where hazardous environmental conditions prevail (e.g. excessive humidity, heat or cold or deposition of dust) and in hazardous locations (e.g. where explosions are liable to occur), special constructions may be required. This document contains all the requirements necessary to ensure compliance with the operational characteristics required for these devices by type tests. It also contains the details relative to test requirements and methods of testing necessary to ensure reproducibility of test results. This document states: a) the characteristics of CBEs; b) the conditions with which CBEs shall comply, with reference to: 1) their operation and behaviour in normal service; 2) their operation and behaviour in case of overload; 3) their operation and behaviour in case of short-circuits up to their rated short-circuit capacity; 4) their dielectric properties; c) the tests intended for confirming that these conditions have been met and the methods to be adopted for the tests; d) the data to be marked on the devices; e) the test sequences to be carried out and the number of samples to be submitted for certification purposes (see Annex C); f) the routine tests to be carried out to reveal unacceptable variations in material or manufacture, likely to affect safety (see Annex I).

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IEC 60934:2019 is available as IEC 60934:2019 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 60934:2019 is applicable to mechanical switching devices designed as "circuit‑breakers for equipment" (CBE) for household and similar applications. CBEs according to this document are intended to provide protection to circuits within electrical equipment including its components (e.g. motors, transformers, internal wiring). This document covers also CBEs applicable for protection of electrical equipment in case of undervoltage and/or overvoltage. This document also covers CBEs which are suitable for isolation. This fourth edition cancels and replaces the third edition published in 2000, Amendment 1:2007 and Amendment 2:2013. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) clarifications for type testing purposes.

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This document gives names, symbols, definitions and units for quantities used in atomic and nuclear physics. Where appropriate, conversion factors are also given.

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IEC 63052:2019 applies to devices for power frequency overvoltage protection (hereafter referred to as "POP") for household and similar uses, with a rated frequency of 50 Hz, 60 Hz or 50/60 Hz, with rated voltage not exceeding 230 V AC (between phase and neutral), and with rated current not exceeding 63 A, either consisting of a functional unit in combination with a main protective device (MPD), or as one single device having opening means able to open the protected circuit in specified conditions.
The main protective device is a circuit-breaker, an RCCB or an RCBO.
The contents of the corrigendum of November 2019 have been included in this copy.

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This part of IEC 61643 is applicable to Surge Protective Devices (SPDs), intended for surge
protection against indirect and direct effects of lightning or other transient overvoltages.
These devices are designed to be connected to the DC side of photovoltaic installations rated
up to 1 500 V DC.
These devices contain at least one non-linear component and are intended to limit surge
voltages and divert surge currents. Performance characteristics, safety requirements,
standard methods for testing and ratings are established.
SPDs complying with this standard are exclusively dedicated to be installed on the DC side of
photovoltaic generators and the DC side of inverters.
SPDs for PV systems with energy storage (e.g. batteries, capacitor banks) are not covered.
SPDs with separate input and output terminals that contain specific series impedance
between these terminal(s) (so called two-port SPDs according to IEC 61643-11:2011) are not
covered.
SPDs compliant with this standard are designed to be permanently connected where
connection and disconnection of fixed SPDs can only be done using a tool. This standard
does not apply to portable SPDs
NOTE 1 In general SPDs for PV applications do not contain a specific series impedance between the input/output
terminals due to power efficiency considerations.
NOTE 2 Wherever reference is made to the electric power system or the power system within this document, this
refers to the DC side of the photovoltaic installation.

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"Compliant" assessment received on 2018-07-20
The project can be published and offered for its citation in the OJEU.

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"Compliant" assessment received on 2018-07-20
The project can be published and offered for its citation in the OJEU.

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IEC 60898-3:2019(E) applies to DC circuit-breakers, having a rated DC voltage not exceeding 440 V, a rated current not exceeding 125 A and a rated short-circuit capacity not exceeding 10 000 A.
These circuit-breakers are intended for the protection against overcurrents of wiring installations of buildings and similar applications; they are designed for use by uninstructed people and for not being maintained.

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This part of IEC 60127 relates to fuse resistors with particular overcurrent protection rated up
to AC 500 V and/or DC 500 V for printed circuits and other substrate systems, used for the
protection of electric appliances, electronic equipment and component parts thereof, normally
intended to be used indoors.
It does not apply to fuse resistors with particular overcurrent protection for appliances
intended to be used under special conditions, such as in a corrosive or explosive atmosphere.
The object of this part of IEC 60127 is
a) to establish uniform requirements for fuse resistors with particular overcurrent protection
so as to protect appliances or parts of appliances in the most suitable way;
b) to define the performance of the fuse resistors with particular overcurrent protection, so as
to give guidance to manufacturers of electrical appliances and electronic equipment and to
ensure replacement of fuse resistors with particular overcurrent protection by those of
similar dimensions and characteristics;
c) to establish uniform test methods for fuse resistors with particular overcurrent protection,
so as to allow verification of the values (for example rated dissipation, functioning
characteristic and rated breaking capacity values) specified by the manufacturer.
Manufacturers of fuse resistors with particular overcurrent protection shall ensure on their
own responsibility that their products comply with the requirements of the resistor-related
standards IEC 60115-1, IEC 60115-4-101 and IEC 60115-4-1021.
This part of IEC 60127 applies in addition to the requirements of IEC 60127-1.

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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.

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IEC 60934:2019 is available as IEC 60934:2019 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 60934:2019 is applicable to mechanical switching devices designed as "circuit‑breakers for equipment" (CBE) for household and similar applications. CBEs according to this document are intended to provide protection to circuits within electrical equipment including its components (e.g. motors, transformers, internal wiring). This document covers also CBEs applicable for protection of electrical equipment in case of undervoltage and/or overvoltage. This document also covers CBEs which are suitable for isolation. This fourth edition cancels and replaces the third edition published in 2000, Amendment 1:2007 and Amendment 2:2013. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) clarifications for type testing purposes.

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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.

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IEC 60076-22-2:2019 applies to radiators mounted on liquid immersed power transformers according to IEC 60076-1 and reactors according to IEC 60076-6 with and without conservator for indoor or outdoor installation. It outlines the service conditions and the mechanical and electrical requirements that are common to this equipment. It also outlines the operation requirements specific to this equipment as well as the preferred dimensions relevant for interchangeability and the type and routine tests to be performed.
Keywords: radiators mounted on liquid immersed power transformers

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IEC 60127-8:2018(E) relates to fuse resistors with particular overcurrent protection rated up to AC 500 V and/or DC 500 V for printed circuits and other substrate systems, used for the protection of electric appliances, electronic equipment and component parts thereof, normally intended to be used indoors. It does not apply to fuse resistors with particular overcurrent protection for appliances intended to be used under special conditions, such as in a corrosive or explosive atmosphere. The object of this part of IEC 60127 is a) to establish uniform requirements for fuse resistors with particular overcurrent protection so as to protect appliances or parts of appliances in the most suitable way; b) to define the performance of the fuse resistors with particular overcurrent protection, so as to give guidance to manufacturers of electrical appliances and electronic equipment and to ensure replacement of fuse resistors with particular overcurrent protection by those of similar dimensions and characteristics; c) to establish uniform test methods for fuse resistors with particular overcurrent protection, so as to allow verification of the values (for example rated dissipation, functioning characteristic and rated breaking capacity values) specified by the manufacturer. This part of IEC 60127 applies in addition to the requirements of IEC 60127-1. This first edition of IEC 60127-8 cancels and replaces IEC PAS 60127-8:2014. This international standard is to be used in conjunction with IEC 60127-1. Keywords: Miniature Fuses, Fuse-Resistors, Overcurrent Protection

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This International Standard applies to automatic reclosing devices (ARDs) for household and
similar uses, for rated voltage not exceeding 440 V AC, and which are intended to be used in
combination with circuit-breakers, RCCBs and RCBOs, and designed either for factory
assembly or for assembly on site.
These devices are intended to reclose main protective devices (MPDs) such as circuit-breakers
complying with IEC 60898-1 and/or IEC 60898-2, RCCBs complying with IEC 61008-1 and/or
IEC 62423, and RCBOs complying with IEC 61009-1 and/or IEC 62423 after tripping of those
devices in order to re-establish continuity of service.
This document includes the following types of ARDs:
– ARDs with assessment means, reclosing only if both the prospective line current and the
prospective earth-fault current do not exceed given values;
– ARDs with assessment means, reclosing only if the prospective line current does not exceed a
given value;
– ARDs with assessment means, reclosing only if the prospective earth-fault current does
not exceed a given value;
– ARDs that recloses without any assessment.
NOTE 1 Installation rules define the condition of use of each of the products and the types.
NOTE 2 The assessment cannot substitute the verifications required by IEC 60364-6.
NOTE 3 The requirements and tests for the assessment function in IT systems are under consideration.
This document does not apply to ARDs with multiple settings adjustable by means accessible
to the user in normal service.
Devices covered by this document are intended to be suitable for operation by uninstructed
persons without the need for maintenance.

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IEC 60127-8:2018 relates to fuse resistors with particular overcurrent protection rated up to AC 500 V and/or DC 500 V for printed circuits and other substrate systems, used for the protection of electric appliances, electronic equipment and component parts thereof, normally intended to be used indoors.
It does not apply to fuse resistors with particular overcurrent protection for appliances intended to be used under special conditions, such as in a corrosive or explosive atmosphere.
The object of this part of IEC 60127 is
a) to establish uniform requirements for fuse resistors with particular overcurrent protection so as to protect appliances or parts of appliances in the most suitable way;
b) to define the performance of the fuse resistors with particular overcurrent protection, so as to give guidance to manufacturers of electrical appliances and electronic equipment and to ensure replacement of fuse resistors with particular overcurrent protection by those of similar dimensions and characteristics;
c) to establish uniform test methods for fuse resistors with particular overcurrent protection, so as to allow verification of the values (for example rated dissipation, functioning characteristic and rated breaking capacity values) specified by the manufacturer.
This part of IEC 60127 applies in addition to the requirements of IEC 60127-1.
This first edition of IEC 60127-8 cancels and replaces IEC PAS 60127-8:2014.
This international standard is to be used in conjunction with IEC 60127-1.
Keywords: Miniature Fuses, Fuse-Resistors, Overcurrent Protection

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IEC 63024:2017 applies to automatic reclosing devices (ARDs) for household and similar uses, for rated voltage not exceeding 440 V AC, and which are intended to be used in combination with circuit-breakers, RCCBs and RCBOs, and designed either for factory assembly or for assembly on site. These devices are intended to reclose main protective devices (MPDs) such as circuit-breakers complying with IEC 60898-1 and/or IEC 60898-2, RCCBs complying with IEC 61008-1 and/or IEC 62423, and RCBOs complying with IEC 61009-1 and/or IEC 62423 after tripping of those devices in order to re-establish continuity of service.

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IEC 61643-331:2017E) is a test specification for metal oxide varistors (MOV), which are used for applications up to 1 000 V AC or 1 500 V DC in power line, or telecommunication, or signalling circuits. They are designed to protect apparatus or personnel, or both, from high transient voltages. This specification applies to MOVs having two electrodes and hybrid overvoltage protection components. This specification also does not apply to mountings and their effect on the MOV’s characteristics. Characteristics given apply solely to the MOV mounted only in the ways described for the tests. This second edition cancels and replaces the first edition published in 2003. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) Update of the nominal varistor voltage test method; b) Addition of thermally protected varistors – component symbol and test methods; c) Addition of nominal discharge current – test methods; d) Addition of voltage ratings for disc types (Table 1); e) Addition of test currents for clamping voltage of disc types (Table 2); f) Addition of typical voltage ratings of SMD types (Table 3); and g) Addition of Limited current and temporary overvoltage tests for thermally protected varistors. Keywords: metal oxide varistors (MOV), high transient voltages.

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    44 pages
    English language
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NEW!IEC 60099-5:2018 is available as IEC 60099-5:2018 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 60099-5:2018 provides information, guidance, and recommendations for the selection and application of surge arresters to be used in three-phase systems with nominal voltages above 1 kV. It applies to gapless metal-oxide surge arresters as defined in IEC 60099-4, to surge arresters containing both series and parallel gapped structure – rated 52 kV and less as defined in IEC 60099-6 and metal-oxide surge arresters with external series gap for overhead transmission and distribution lines (EGLA) as defined in IEC 60099-8. In Annex J, some aspects regarding the old type of SiC gapped arresters are discussed. Surge arrester residual voltage is a major parameter to which most users have paid a lot of attention to when selecting the type and rating. Typical maximum residual voltages are given in Annex F. It is likely, however, that for some systems, or in some countries, the requirements on system reliability and design are sufficiently uniform, so that the recommendations of the present standard may lead to the definition of narrow ranges of arresters. The user of surge arresters will, in that case, not be required to apply the whole process introduced here to any new installation and the selection of characteristics resulting from prior practice may be continued. Annexes H and I present comparisons and calculations between old line discharge classification and new charge classification. This third edition cancels and replaces the second edition published in 2013. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition regarding the new surge arrester classification introduced in IEC 60099-4:2014: a) Expanded discussion of comparison between the old and new classification and how to calculate or estimate the corresponding charge for different stresses. b) New annexes dealing with: - Comparison between line discharge classes and charge classification - Estimation of arrester cumulative charges and energies during line switching Keywords: selection and application of surge arrestors, nominal voltages above 1 kV

  • Standard
    193 pages
    English language
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IEC 62955:2018 applies to residual direct current detecting devices (RDC-DD) for permanently connected AC electric vehicle charging stations (mode 3 charging of electric vehicles, according to IEC 61851-1 and IEC 60364-7-722), hereafter referred to as RDC-MD (residual direct current monitoring device) or RDC-PD (residual direct current protective device), for rated voltages not exceeding 440 V AC with rated frequencies of 50 Hz, 60 Hz or 50/60 Hz and rated currents not exceeding 125 A.

  • Standard
    315 pages
    English and French language
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