iTeh StandardsiTeh Standards
EURUSD
Your shopping cart is empty.
SIST

kSIST prEN IEC 61558-2-8:2024

(Main)

Safety of transformers, reactors, power supply units and combinations thereof - Part 2-8: Particular requirements and tests for transformers and power supply units for bells and chimes

Safety of transformers, reactors, power supply units and combinations thereof - Part 2-8: Particular requirements and tests for transformers and power supply units for bells and chimes

IEC 61558-2-8:2024 is available as IEC 61558-2-8:2024 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 61558-2-8:2024 deals with the safety of bell and chime transformers and power supply units incorporating bell and chime transformers. Transformers incorporating electronic circuits are also covered by this document. This third edition cancels and replaces the second edition published in 2010. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) adjustment of structure and references in accordance with IEC 61558-1:2017;
b) new symbol for power supply unit with linearly regulated output voltage.
It has the status of a group safety publication in accordance with IEC Guide 104.

Sicherheit von Transformatoren, Drosseln, Netzgeräten und entsprechenden Kombinationen - Teil 2-8: Besondere Anforderungen und Prüfungen an Transformatoren und Netzgeräten für Klingeln und Läutewerke

Sécurité des transformateurs, bobines d'inductance, blocs d'alimentation et des combinaisons de ces éléments - Partie 2-8: Règles particulières et essais pour les transformateurs et blocs d'alimentation pour sonneries et carillons

IEC 61558-2-8:2024 est disponible sous forme de IEC 61558-2-8:2024 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.

L'IEC 61558-2-8:2024 traite de la sécurité des transformateurs pour sonneries et carillons et des blocs d’alimentation qui incorporent des transformateurs pour sonneries et carillons. Les transformateurs qui incorporent des circuits électroniques sont également couverts par le présent document. Cette troisième édition annule et remplace la deuxième édition parue en 2010. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) la structure et les références ont été alignées sur l’IEC 61558-1:2017;
b) un nouveau symbole a été ajouté pour les blocs d'alimentation dont la régulation de la tension secondaire est linéaire.
Il a le statut de publication groupée de sécurité conformément au Guide 104 de l'IEC.

Varnost transformatorjev, dušilk, napajalnikov in kombinacij teh elementov - 2-8. del: Posebne zahteve in preskusi za transformatorje in napajalnike za zvonce in gonge

General Information

Status
Not Published
Public Enquiry End Date
02-Mar-2023
ICS
29.180 - Transformers. Reactors
Technical Committee
I96 - Imaginarni 96
Current Stage
5020 - Formal vote (FV) (Adopted Project)
Start Date
28-Mar-2024
Due Date
16-May-2024
Completion Date
07-May-2024
Directive
2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
Mandate
M/511 - Mandate to CEN, CENELEC and ETSI relating to harmonised standards in the field of the Low Voltage Directive
Ref Project
FprEN IEC 61558-2-8:2024 - Safety of transformers, reactors, power supply units and combinations thereof - Part 2-8: Particular requirements and tests for transformers and power supply units for bells and chimes

Relations

Revised
SIST EN 61558-2-8:2010 - Safety of transformers, reactors, power supply units and combinations thereof - Part 2-8: Particular requirements and tests for transformers and power supply units for bells and chimes (IEC 61558-2-8:2010)
Effective Date
25-Oct-2022

Buy Standard

prEN IEC 61558-2-8:2023prEN IEC 61558-2-8:2023
PreviousNext
Draft
prEN IEC 61558-2-8:2023
English language
17 pages
sale 10% off
Preview
sale 10% off
Preview
e-Library read for
1 day

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN IEC 61558-2-8:2023
01-februar-2023
Varnost transformatorjev, dušilk, napajalnikov in kombinacij teh elementov - 2-8.
del: Posebne zahteve in preskusi za transformatorje in napajalnike za zvonce in
gonge
Safety of transformers, reactors, power supply units and combinations thereof - Part 2-8:
Particular requirements and tests for transformers and power supply units for bells and
chimes
Sécurité des transformateurs, bobines d'inductance, blocs d'alimentation et des
combinaisons de ces éléments - Partie 2-8: Règles particulières et essais pour les
transformateurs et blocs d'alimentation pour sonneries et carillons
Ta slovenski standard je istoveten z: prEN IEC 61558-2-8:2023
ICS:
29.180 Transformatorji. Dušilke Transformers. Reactors
oSIST prEN IEC 61558-2-8:2023 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN IEC 61558-2-8:2023

---------------------- Page: 2 ----------------------
oSIST prEN IEC 61558-2-8:2023

96/565/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:

IEC 61558-2-8 ED3
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:

2023-01-06 2023-03-31
SUPERSEDES DOCUMENTS:

96/562/RR

IEC TC 96 : TRANSFORMERS, REACTORS, POWER SUPPLY UNITS, AND COMBINATIONS THEREOF
SECRETARIAT: SECRETARY:
Germany Mr Wolfgang Reichelt
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:


Other TC/SCs are requested to indicate their interest, if
any, in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.

This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.

TITLE:
Safety of transformers, reactors, power supply units and combinations thereof - Part 2-8:
Particular requirements and tests for transformers and power supply units for bells and
chimes

PROPOSED STABILITY DATE: 2025

NOTE FROM TC/SC OFFICERS:


Copyright © 2022 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to
download this electronic file, to make a copy and to print out the content for the sole purpose of preparing National
Committee positions. You may not copy or "mirror" the file or printed version of the document, or any part of it,
for any other purpose without permission in writing from IEC.

---------------------- Page: 3 ----------------------
oSIST prEN IEC 61558-2-8:2023
IEC CDV 61558-2-8 © IEC 2022 2 96/565/CDV

1 CONTENTS
2
3 FOREWORD . 3
4 INTRODUCTION . 5
5 1 Scope . 6
6 2 Normative references . 7
7 3 Terms and definitions . 7
8 4 General requirements . 8
9 5 General notes on tests . 8
10 6 Ratings . 8
11 7 Classification . 8
12 8 Marking and other information . 9
13 9 Protection against electric shock . 10
14 10 Change of input voltage setting . 10
15 11 Output voltage and output current under load . 10
16 12 No-load output voltage . 11
17 13 S
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.

This May Also Interest You

SIST
SIST EN IEC 62041:2020(Main)
Transformers, reactors, power supply units, and combinations thereof - EMC requirements
EN IEC 62041:2020

EN-IEC 62041 is applicable to transformers, reactors and power supply units covered by the IEC 61558 series of standards. This document deals with the electromagnetic compatibility requirements for emission and immunity within the frequency range 0 Hz to 400 GHz. No tests need to be performed at frequencies where no requirements are specified. For associated transformers, associated reactors and associated power supply units either supplied with or incorporated into an appliance or equipment the relevant EMC standard for that appliance or equipment applies. This document covers normal operating conditions only. Other operations of the transformers, reactors and power supply units (e.g. simulated faults in the electric circuitry for testing purposes or functional safety due to the effects of the electromagnetic phenomena, or evaluation of human being for exposure to electromagnetic fields (EMF)) have not been taken into consideration in this document. Requirements are specified for each port considered. If requirements are different the most severe takes precedence. This document may also be used as a guide to test transformers, reactors and power supply units separately before these are incorporated into an appliance or equipment. This document does not apply to: - uninterruptible power supplies (UPS) covered by IEC 62040 (all parts); - power supply units covered by IEC 61204, (i.e. DC-DC converters, DC power and distribution equipment and power supply units for use in applications covered by IEC 60950-1, IEC 61010-1, IEC 60601-1 and IEC 60065); - power supplies and converters for use with or in products covered by IEC 61347 (all parts).

  • Standard
    35 pages
    English language
    sale 10% off
    e-Library read for
    1 day
SIST
SIST EN IEC 61558-1:2019(Main)
Safety of transformers, reactors, power supply units and combinations thereof - Part 1: General requirements and tests
EN IEC 61558-1:2019

NEW!IEC 61558-1:2017 is available as IEC 61558-1:2017 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 61558-1:2017 deals with safety aspects of transformers, reactors, power supply units and combinations thereof such as electrical, thermal and mechanical safety. This document covers the following independent or associated stationary or portable types of dry-type transformers, power supply units, including switch mode power supply units,  reactors and combinations thereof in the field of safety. The windings can be encapsulated or non-encapsulated. They are not forming a part of the distribution network. This third edition cancels and replaces the second edition published in 2005 and Amendment 1:2009. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a. fully insulated winding wires (FIW), new tables and aging tests for FIW constructions,
b. overvoltage categories 1, 2, 3 and 4 for clearances and dielectric strength tests (new tables) are included,
c. development of new symbols for the different overvoltage categories,
d. symbol for maximum altitudes, if higher than 2 000 m,
e. symbol for plug in power supply units, if the pins are damaged (tumbling barrel test),
f. symbol for minimum temperature (even during the transportation),
g. alternative temperature measurement, simulated load and back to back method according to IEC 60076-11,
h. short circuit and overload protection, simulated load and back to back method according to IEC 60076-11,
i. adjustment of temperatures in Table 2 according to CENELEC Guide 29,
j. establishing partial discharge test above 750 V for FIW constructions,
k. requirements for toroidal core constructions, division for basic and for supplementary isolation,
l. modification of protection indexes for enclosures (IP-code),
m. dimensioning of rectangular cross section connectors for transformers,
n. repetition test, 80% of required dielectric strength test voltage of Table 14,a.
o. vibration test for vehicles and railway applications,
p. two Y1 Capacitors for working voltages above 250 V and not exceeding 500 V with overvoltage category 3.
It has the status of a group safety publication in accordance with IEC Guide 104.

  • Standard
    183 pages
    English language
    sale 10% off
    e-Library read for
    1 day
SIST
SIST EN 61558-2-10:2014(Main)
Safety of transformers, reactors, power supply units and combinations thereof - Part 2-10: Particular requirements and tests for separating transformers with high insulation level and separating transformers with output voltages exceeding 1000 V
EN 61558-2-10:2014

EN IEC 61558-2-10 deals with the safety of separating transformers with high insulation level and separating transformers with output voltages exceeding 1000 V. Transformers incorporating electronic circuits are also covered by this standard. Unless otherwise specified, from here onward, the term transformer covers separating transformers with high insulation level and separating transformers with output voltages exceeding 1000 V a.c or 1500 V d.c . This Part 2-10 is applicable to stationary or portable, single-phase or polyphase, air-cooled (natural or forced) independent or associated dry-type transformers. The windings may be encapsulated or non-encapsulated. This standard is applicable to transformers and power supply (linear) with internal operational frequencies not exceeding 500 Hz. This standard used in combination with Part 2-16 for switch mode power supply units (SMPS) is also applicable to power supplies with internal operational frequencies higher than 500 Hz. Where the two requirements are in conflict the most severe take precedence. The rated supply voltage does not exceed 1 000 V a.c., and the rated supply frequency and the internal operating frequency do not exceed 500 Hz. The rated supply voltage does not exceed 1000 V a.c., and the rated supply frequency and the internal operating frequency do not exceed 500 Hz. The rated output does not exceed: - 25 kVA for single-phase transformers; - 40 kVA for polyphase transformers. This Part 2-10 is applicable to transformers without limitation of the rated output subject to an agreement between the purchaser and the manufacturer. Where applicable the no-load output voltage or the rated output voltage: - does not exceed 1000 V a.c. or 1500 V d.c. for separating transformers with high insulation level; - does exceed 1000 V a. c or 1500 V d.c. and does not exceed 15 000 V a.c. or 15000 V d.c. for separating transformer with output voltage exceed 1000 V. This Part 2-10 is not applicable to: - transformers covered by IEC 60076-11; - neon transformers covered by IEC 61050 and - power supplies and converters for use with or in products according to IEC 61347-2-10. This Part 2-10 is not applicable to external circuits and their components intended to be connected to the input terminals and output terminals of the transformers. Transformers covered by this Part 2-10 are used only in applications where double or reinforced insulation between circuits is not required by the installation rules or by the end product standard.

  • Standard
    19 pages
    English language
    sale 10% off
    e-Library read for
    1 day
SIST
SIST EN 61558-2-26:2014(Main)
Safety of transformers, reactors, power supply units and combinations thereof - Part 2-26: Particular requirements and tests for transformers and power supply units for saving energy and other purposes
EN 61558-2-26:2013

This part of IEC 61558 deals with the safety of transformers, power supply units and switch mode power supply units all for saving energy and other purposes in electrical installations by adjusting the output voltage and/or other electrical characteristics on the output circuits without interruption affected by the transformers, power supply unit and switch mode power supply unit. The saving of energy is obtained by voltage stabilization and/or voltage adjusting of the electrical installation. This standard may also be used for power supply units and switch mode power supply units intended to be used where adjusting of the voltage or other electrical characteristics is required by the final application. This part applies to single-phase or three-phase transformers, power supply units and switch mode power supply units all for saving energy which are air-cooled (natural or forced), independent or incorporated and containing transformers and/or power supply units from the following parts of the IEC 61558 series: Part 2-1: Particular requirements and tests for separating transformers and power supplies incorporating separating transformers for general applications. Part 2-4: Particular requirements and tests for isolating transformers and power supply units incorporating isolating transformers. Part 2-6: Particular requirements and tests for safety isolating transformers and power supply units incorporating safety isolating transformers. Part 2-13: Particular requirements and tests for auto transformers and power supply units incorporating auto transformers. Part 2-14: Particular requirements and tests for variable transformers and power supply units incorporating variable transformers. Part 2-16: Particular requirements and tests for switch mode power supply units and transformers for switch mode power supply units. The rated supply voltage does not exceed 1000 V a.c., and the rated supply frequency does not exceed 500 Hz.

  • Standard
    22 pages
    English language
    sale 10% off
    e-Library read for
    1 day
SIST
SIST EN 61558-2-16:2010/A1:2014(Amendment)
Safety of transformers, reactors, power supply units and similar products for supply voltages up to 1100 V - Part 2-16: Particular requirements and tests for switch mode power supply units and transformers for switch mode power supply units
EN 61558-2-16:2009/A1:2013

This part of IEC 61558 deals with the safety of switch mode power supply units and transformers for switch mode power supply units. Transformers incorporating electronic circuits are also covered by this standard.

  • Amendment
    16 pages
    English language
    sale 10% off
    e-Library read for
    1 day
SIST
SIST EN 61558-2-14:2013(Main)
Safety of transformers, reactors, power supply units and combinations thereof - Part 2-14: Particular requirements and test for variable transformers and power supply units incorporating variable transformers
EN 61558-2-14:2013

This part of IEC 61558 deals with safety of variable transformers for general applications and power supply units incorporating variable transformers for general applications. Transformers incorporating electronic circuits are also covered by this standard. NOTE 1 Safety includes electrical, thermal, mechanical and chemical aspects. Unless otherwise specified, from here onward, the term transformer covers variable transformers for general applications and power supply units incorporating variable transformers for general applications. The rated supply voltage does not exceed 1 000 V a.c., and the rated supply frequency does not exceed 500 Hz. This standard is applicable to transformers and power supply units (linear) with internal operational frequencies not exceeding 500 Hz. This standard used in combination with Part 2-16 for switch mode power supply units (SMPS) is also applicable to power supplies with internal operational frequencies higher than 500 Hz. Where the two requirements are in conflict the most severe take precedence This part does not apply to transformers covered by IEC 60076-11. This part is applicable to stationary or portable, single-phase or polyphase, air-cooled (natural or forced) independent or associated dry-type transformers.
– variable auto-transformers and power supply units incorporating variable autotransformers;
– variable separating transformers and power supply units incorporating variable separating transformers;
– variable isolating transformers and power supply units incorporating variable isolating transformers;
– variable safety isolating transformers and power supply units incorporating variable safety isolating transformers. The windings may be encapsulated or non-encapsulated. The rated output does not exceed:
– 40 kVA for single-phase variable auto-transformers and power supply units
incorporating single-phase variable auto-transformers;
– 200 kVA for poly-phase variable auto-transformers and power supply units
incorporating poly-phase variable auto-transformers;
– 1 kVA for single-phase variable separating transformers and power supply units incorporating single-phase variable separating transformers;
– 5 kVA for poly-phase variable separating transformers and power supply units incorporating poly-phase variable separating transformers;
– 25 kVA for single-phase variable isolating transformers and power supply units incorporating single-phase variable isolating transformers;
– 40 kVA for poly-phase variable isolating transformers and power supply units incorporating poly-phase variable isolating transformers;
– 10 kVA for single-phase variable safety isolating transformers and power supply units incorporating single-phase variable safety isolating transformers;
– 16 kVA for poly-phase variable safety isolating transformers and power supply units incorporating poly-phase variable safety isolating transformers. This part is applicable to transformers without limitation of the rated output subject to an agreement between the purchaser and the manufacturer.

  • Standard
    26 pages
    English language
    sale 10% off
    e-Library read for
    1 day
SIST
SIST EN 61558-2-15:2012(Main)
Safety of transformers, reactors, power supply units and combination thereof - Part 2-15: Particular requirements and tests for isolating transformers for the supply of medical locations
EN 61558-2-15:2012

This part of IEC 61558 deals with safety aspects of isolating transformers for the supply of medical locations. Unless otherwise specified, from here onward, the term transformer covers isolating transformers for the supply of medical locations. This part is applicable to stationary, single-phase or three-phase, air-cooled (natural or forced) independent dry-type isolating transformers for the supply of medical IT systems for group 2 medical locations, designed to be permanently connected to the fixed wiring and intended to form the IT power system on the secondary side. The windings may be encapsulated or nonencapsulated. The rated supply voltage does not exceed 1000 V a.c. The rated supply frequency and internal operational frequency do not exceed 500 Hz. The rated output does not be less than 0,5 kVA and does not exceed 10 kVA for single-phase and three-phase transformers. This part is applicable to transformers without limitation of the rated output subject to an agreement between the purchaser and the manufacturer. The no-load output voltage and the rated output voltage does not exceed 250 V a.c. for single-phase or three-phase transformer (phase-to-phase voltage). This standard do not cover power supply unit. This part is not applicable to external circuits and their components intended to be connected to the input terminals and output terminals of the transformers. Transformers covered by this part are used in applications where double or reinforced insulation between circuits is required by the installation rules or by the appliance specification. - for transformers intended to be used in vehicles, on board ships, and aircraft, additional requirements (from other applicable standards, national rules, etc.) may be necessary; - measures to protect the enclosure and the components inside the enclosure against external influences such as fungus, vermin, termites, solar-radiation, and icing should also be considered; - the different conditions for transportation, storage, and operation of the transformers should also be considered; - additional requirements in accordance with other appropriate standards and national rules may be applicable to transformers intended for use in special environments.

  • Standard
    22 pages
    English language
    sale 10% off
    e-Library read for
    1 day
SIST
SIST EN 61558-2-12:2011
Safety of transformers, reactors, power supply units and combinations thereof - Part 2-12: Particular requirements and tests for constant voltage transformers and power supply units for constant voltage (IEC 61558-2-12:2011)
EN 61558-2-12:2011

This part of IEC 61558 deals with the safety of constant voltage transformers for general applications and power supply units for constant voltage for general applications. Constant voltage transformers incorporating electronic circuits are also covered by this standard.
NOTE 1 Safety includes electrical, thermal and mechanical aspects.
Unless otherwise specified, from here onward, the term transformer covers constant voltage transformers for general applications and power supply units for constant voltage for general applications.
This part is applicable to stationary or portable, single-phase or polyphase, air-cooled (natural or forced), independent or associated dry-type:
– constant voltage auto-transformers;
– constant voltage separating transformers;
– constant voltage isolating transformers;
– constant voltage safety isolating transformers.
The windings may be encapsulated or non-encapsulated.
This standard is applicable to transformers and power supply (linear) with internal operating frequencies not exceeding 500 Hz.
This standard used in combination with Part 2-16 for switch mode power supply (SMPS) units is also applicable to power supplies with internal operating frequencies higher than 500 Hz. Where the two requirements are in conflict, the most severe take precedence.
The rated supply voltage does not exceed 1 000 V a.c., the rated supply frequency does not exceed 500 Hz, the internal operating resonant frequency does not exceed 30 kHz and the internal operating frequency does not exceed 100 MHz.
The rated output does not exceed:
– 40 kVA for single-phase constant voltage auto-transformers;
– 200 kVA for poly-phase constant voltage auto-transformers;
– 25 kVA for single-phase constant voltage separating transformers and constant voltage isolating transformers;
– 40 kVA for poly-phase constant voltage separating transformers and constant voltage isolating transformers;
– 10 kVA for single-phase constant voltage safety isolating transformers;
– 16 kVA for poly-phase constant voltage safety isolating transformers.
This part is applicable to transformers without limitation of the rated output subject to an agreement between the purchaser and the manufacturer.
(...)

  • Standard
    22 pages
    English language
    sale 10% off
    e-Library read for
    1 day
SIST
SIST EN 61558-2-9:2011
Safety of transformers, reactors, power supply units and combinations thereof - Part 2-9: Particular requirements and tests for transformers and power supply units for class III handlamps for tungsten filament lamps (IEC 61558-2-9:2010)
EN 61558-2-9:2011

Replacement:
This part of IEC 61558 deals with the safety of transformers for class III handlamps for tungsten filament lamps and power supply units incorporating transformers for class III handlamps for tungsten filament lamps. Transformers incorporating electronic circuits are also covered by this standard.
NOTE 1 Safety includes electrical, thermal, mechanical and chemical aspects.
Unless otherwise specified, from here onward, the term transformer covers transformers for
class III handlamps for tungsten filament lamps and power supply units incorporating transformers for class III handlamps for tungsten filament lamps. This part is applicable to stationary or portable single-phase air-cooled (natural or forced) independent or associated dry-type transformers. The windings may be encapsulated or non-encapsulated. This standard is applicable to transformers and power supply (linear) with internal operational frequencies not exceeding 500 Hz. This standard used in combination with Part 2-16 for switch mode power supply (SMPS) units is also applicable to power supplies with internal operational frequencies higher than 500 Hz. Where the two requirements are in conflict, the most severe take precedence. The rated supply voltage does not exceed 1 000 V a.c., and the rated supply frequency and the internal operational frequencies do not exceed 500 Hz. Transformers for class III handlamps for tungsten filament lamps have the following additional characteristics:
– the no-load output voltage and the rated output voltage do not exceed 50 V a.c. or 120 V ripple-free d.c.;
– there is only a small difference between the no-load voltage and the rated output voltage.
The rated output does not exceed:
– 10 kVA.
This part is not applicable to external circuits and their components intended to be connected to the input terminals and output terminals of the transformers. Transformers covered by this part are used in applications where double or reinforced insulation between circuits is required by the installation rules or by the end product standard.
NOTE 2 Attention is drawn to the following:
- for transformers intended to be used in vehicles, on board ships, and aircraft, additional requirements (from other applicable standards, national rules, etc.) may be necessary;
- measures to protect the enclosure and the components inside the enclosure against external influences such as fungus, vermin, termites, solar-radiation, and icing should also be considered;
- the different conditions for transportation, storage, and operation of the transformers should also be considered;
- additional requirements in accordance with other appropriate standards and national rules may be applicable to transformers intended for use in special environments.
NOTE 3 Future technological development of transformers may necessitate a need to increase the upper limit of the frequencies, until then this part may be used as a guidance document.

  • Standard
    17 pages
    English language
    sale 10% off
    e-Library read for
    1 day
SIST
SIST EN 61558-2-20:2011
Safety of transformers, reactors, power supply units and combinations thereof - Part 2-20: Particular requirements and tests for small reactors (IEC 61558-2-20:2010)
EN 61558-2-20:2011

Replacement:
This part of IEC 61558 deals with the safety of small reactors for general applications.
NOTE 1 Safety includes electrical, thermal and mechanical aspects.
Unless otherwise specified, from here onward, the term transformer or reactor covers small
reactors.
This part is applicable to stationary or portable, single-phase or polyphase, air-cooled (natural
or forced) general purpose reactors including alternating current, premagnetised and current
compensated independent or associated reactors.
The rated supply voltage does not exceed 1 000 V a.c. or 1 500V ripple-free d.c., the rated supply frequency and the internal operational frequencies do not exceed 1 MHz.
The rated power does not exceed:
– 25 kVAR a.c. (25 kW d.c.) for single-phase reactors,
– 50 kVAR a.c. (50 kW d.c.) for poly-phase reactors.
This part is applicable to reactors without limitations of the rated power subject to an agreement between the purchaser and the manufacturer.
This part is applicable to dry-type reactors. The windings may be encapsulated or nonencapsulated.
This part does not apply to:
– reactors covered by IEC 60289;
– ballast for tubular fluorescent covered by IEC 61347-2-8;
– ballast for discharge lamps (excluding tubular fluorescent lamps) covered by IEC 61347-2-9.
NOTE 2 For reactors filled with liquid dielectric or pulverised material such as sand, additional requirements are under consideration.
NOTE 3 Attention is drawn to the following:
- for reactors intended to be used in vehicles, on board ships, and aircraft, additional requirements (from other applicable standards, national rules, etc.) may be necessary;
- measures to protect the enclosure and the components inside the enclosure against external influences such as fungus, vermin, termites, solar-radiation, and icing should also be considered;
- the different conditions for transportation, storage, and operation of the reactor should also be considered;
- additional requirements in accordance with other appropriate standards and national rules may be applicable to reactors intended for use in special environments, such as tropical environment.
NOTE 4 Normally, reactors are intended to be associated with equipment for functional requirements of the equipment or requirements by the installation rules or by other appliance specifications.
NOTE 5 Reactors incorporating electronic circuits and components are also covered by this standard.
NOTE 6 The protection against electric shock may be provided (or completed) by other parts or features of the equipment, such as the body.
NOTE 7 Reactors for particular applications will in the future be covered by complementary normative annexes.
NOTE 8 Future technological development of reactors may necessitate a need to increase the upper limit of the frequencies, until then this part may be used as a guidance document.

  • Standard
    21 pages
    English language
    sale 10% off
    e-Library read for
    1 day