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Automatic electrical controls - Part 2-7: Particular requirements for timers and time switches
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Available format(s): Hardcopy, PDF
Language(s): English
Published date: 18-05-2020
Publisher: National Standards Authority of Ireland
For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.Only cited Standards give presumption of conformance to New Approach Directives/Regulations.Dates of withdrawal of national standards are available from NSAI.
FOREWORD 1 Scope and normative references 2 Definitions 3 General requirements 4 General notes on tests 5 Rating6 Classification 7 Information 8 Protection against electric shock 9 Provision for protective earthing 10 Terminals and terminations 11 Constructional requirements 12 Moisture and dust resistance 13 Electric strength and insulation resistance 14 Heating 15 Manufacturing deviation and drift 16 Environmental stress 17 Endurance 18 Mechanical strength 19 Threaded parts and connections 20 Creepage distances, clearances and distances through solid insulation 21 Resistance to heat, fire and tracking 22 Resistance to corrosion 23 Electromagnetic compatibility (EMC) requirements – emission 24 Components 25 Normal operation 26 Electromagnetic compatibility (EMC) requirements – immunity 27 Abnormal operation 28 Guidance on the use of electronic disconnection Annex H (normative) Requirements for electronic controls Annex AA (normative) Number of cycles, automatic and manual action Bibliography
In general, this part of IEC 60730 applies to timers and time switches that may use electricity, gas, oil, solid fuel, solar thermal energy, etc. or a combination thereof, including heating, air conditioning and similar applications.
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