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CENELEC
EN 61643-351:2017

EN 61643-351:2017

Current

Current

The latest, up-to-date edition.

Components for low-voltage surge protective devices - Part 351: Performance requirements and test methods for telecommunications and signalling network surge isolation transformers (SIT)

Published date

10-02-2017

Publisher

European Committee for Standards - Electrical

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FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms, definitions, symbols, abbreviations
  and acronyms
4 Service conditions
5 SIT surge conditions
6 Characteristics
7 Ratings
8 Identification
Annex A (informative) - 1,2/50 impulse
Bibliography
Annex ZA (normative) - Normative references to
         international publications with their
         corresponding European publications

IEC 61643-351:2016 defines test circuits and test methods for determining and verifying the SIT surge parameters. Preferred performance values for key parameters are given. Surge isolation transformers (SITs) are used for signal transformer applications with signal levels up to 400 V peak to peak. SITs are transformers, with or without an internal-winding screen, with a rated impulse withstand voltage greater than the peak voltage of the expected common-mode surge environment. SITs are applicable to components for surge protection against indirect and direct effects of lightning or other transient overvoltage. SITs are used to mitigate the onward propagation of common-mode voltage surges. This part of IEC 61643 does not cover SIT operation under differential-mode lightning surge conditions.Keywords: Surge isolation transformers (SITs)

Committee
CLC/SR 37B
DocumentType
Standard
PublisherName
European Committee for Standards - Electrical
Status
Current

I.S. EN IEC 61643-352:2018 COMPONENTS FOR LOW-VOLTAGE SURGE PROTECTION - PART 352: SELECTI AND APPLICATION PRINCIPLES FOR TELECOMMUNICATIONS AND SIGNALLIN NETWORK SURGE ISOLATION TRANSFORMERS (SITS)
BS EN IEC 61643-352:2018 Components for low-voltage surge protection Selection and application principles for telecommunications and signalling network surge isolation transformers (SITs)
EN IEC 61643-352:2018 Components for low-voltage surge protection - Part 352: Selection and application principles for telecommunications and signalling network surge isolation transformers (SITs)

EN 61558-2-4:2009 Safety of transformers, reactors, power supply units and similar products for supply voltages up to 1 100 V - Part 2-4: Particular requirements and tests for isolating transformers and power supply units incorporating isolating transformers
IEC 60721-3-9:1993 Classification of environmental conditions - Part 3: Classification of groups of environmental parameters and their severities - Section 9: Microclimates inside products
EN 60068-2-1:2007 Environmental testing - Part 2-1: Tests - Test A: Cold
IEC 61558-2-4:2009 Safety of transformers, reactors, power supply units and similar products for supply voltages up to 1 100 V - Part 2-4: Particular requirements and tests for isolating transformers and power supply units incorporating isolating transformers
EN 61558-1:2005/A1:2009 SAFETY OF POWER TRANSFORMERS, POWER SUPPLIES, REACTORS AND SIMILAR PRODUCTS - PART 1: GENERAL REQUIREMENTS AND TESTS
EN 60068-2-2:2007 Environmental testing - Part 2-2: Tests - Test B: Dry heat
EN 60721-3-9:1993/A1:1995 CLASSIFICATION OF ENVIRONMENTAL CONDITIONS - PART 3: CLASSIFICATION OF GROUPS OF ENVIRONMENTAL PARAMETERS AND THEIR SEVERITIES - SECTION 9: MICROCLIMATES INSIDE PRODUCTS
EN 60060-1:2010 High-voltage test techniques - Part 1: General definitions and test requirements
ISO/IEC 11801:2002 Information technology Generic cabling for customer premises
IEC 61558-2-6:2009 Safety of transformers, reactors, power supply units and similar products for supply voltages up to 1 100 V - Part 2-6: Particular requirements and tests for safety isolating transformers and power supply units incorporating safety isolating transformers
IEC 61558-1:2017 Safety of transformers, reactors, power supply units and combinations thereof - Part 1: General requirements and tests
IEC 60076-1:2011 Power transformers - Part 1: General
IEC 60068-2-2:2007 Environmental testing - Part 2-2: Tests - Test B: Dry heat
IEC 60989:1991 Separating transformers, autotransformers, variable transformersand reactors.
EN 60076-1:2011 POWER TRANSFORMERS - PART 1: GENERAL (IEC 60076-1:2011)
IEC 61340-4-8:2014 Electrostatics - Part 4-8: Standard test methods for specific applications - Electrostatic discharge shielding - Bags
IEC 60721-3-3:1994+AMD1:1995+AMD2:1996 CSV Classification of environmental conditions - Part 3-3: Classification of groups of environmental parameters and their severities - Stationary use at weatherprotected locations
EN 61558-2-6:2009 Safety of transformers, reactors, power supply units and similar products for supply voltages up to 1 100 V - Part 2-6: Particular requirements and tests for safety isolating transformers and power supply units incorporating safety isolating transformers
IEC 60068-2-1:2007 Environmental testing - Part 2-1: Tests - Test A: Cold
IEC 60060-1:2010 High-voltage test techniques - Part 1: General definitions and test requirements
ISO/IEC/IEEE 8802-3:2017 Information technology — Telecommunications and information exchange between systems — Local and metropolitan area networks — Specific requirements — Part 3: Standard for Ethernet
IEC TR 60664-2-1:2011 Insulation coordination for equipment within low-voltage systems - Part 2-1: Application guide - Explanation of the application of the IEC 60664 series, dimensioning examples and dielectric testing
IEC TR 61340-1:2012 Electrostatics - Part 1: Electrostatic phenomena - Principles and measurements
EN 61340-4-8:2015 Electrostatics - Part 4-8: Standard test methods for specific applications - Electrostatic discharge shielding - Bags
EN 60721-3-3 : 95 AMD 2 97 CLASSIFICATION OF ENVIRONMENTAL CONDITIONS - CLASSIFICATION OF GROUPS OF ENVIRONMENTAL PARAMETERS AND THEIR SEVERITIES - STATIONARY USE AT WEATHER-PROTECTED LOCATIONS

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