SOUTH AFRICAN NATIONAL STANDARD

Transcription

1 ISBN Edition 2.1 IEC :2011 Edition 3.1 SOUTH AFRICAN NATIONAL STANDARD Automatic electrical controls for household and similar use Part 2-9: Particular requirements for temperature sensing controls This national standard is the identical implementation of IEC :2011 and is adopted with the permission of the International Electrotechnical Commission. WARNING Can only be used in conjunction with SANS Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001 Tel: Fax: SABS

2 Edition 2.1 IEC :2011 Edition 3.1 Table of changes Change No. Date Scope IEC amdt Amended to include new referenced standards, to add a new annex EE, which is an informative guide to the application of temperature sensing controls, and to add a new requirement for endurance to address the endurance requirement for temperature sensing devices where the whole control is declared as the sensing element for ambient temperatures below 0 C. National foreword This South African standard was approved by National Committee SABS TC 72, Safety of electrical appliances and electronic equipment, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in February This SANS document supersedes SANS :2008 (edition 2).

3 INTERNATIONAL STANDARD NORME INTERNATIONALE IEC Edition Automatic electrical controls for household and similar use Part 2-9: Particular requirements for temperature sensing controls Dispositifs de commande électrique automatiques à usage domestique et analogue Partie 2-9: Règles particulières pour les dispositifs de commande thermosensibles IEC :2008+A1:2011

4 IEC:2008+A1:2011 CONTENTS FOREWORD Scope and normative references Definitions General requirements General notes on tests Rating Classification Information Protection against electric shock Provision for protective earthing Terminals and terminations Constructional requirements Moisture and dust resistance Electric strength and insulation resistance Heating Manufacturing deviation and drift Environmental stress Endurance Mechanical strength Threaded parts and connections Creepage distances, clearances and distances through solid insulation Fire hazard testing Resistance to corrosion Electromagnetic compatibility (EMC) requirements emission Components Normal operation Electromagnetic compatibility (EMC) requirements immunity Abnormal operation Guidance on the use of electronic disconnection Annexes Annex H (normative) Requirements for electronic controls Annex J (normative) Requirements for controls using thermistors Annex AA (informative) Maximum manufacturing deviation and drift Annex BB (informative) Time factor Annex CC (informative) Number of cycles Annex DD (normative) Controls for use in agricultural confinement buildings Annex EE (informative) Guide to the application of temperature sensing controls within the scope of IEC

5 IEC:2008+A1: Figure Impact tool Figure Aluminium cylinder for temperature change method Figure BB.1 Determination of time factor in the case of a sudden temperature change Figure BB.2 Determination of time factor in the case of a linear rise of test-bath temperature Figure EE.1 Thermostat Figure EE.2 Self-resetting temperature limiter Figure EE.3 Non-self-resetting temperature limiter Figure EE.4 Self-resetting thermal cut-out Figure EE.5 Manual reset thermal cut-out Figure EE.6 Single operation device Figure EE.7 Three-stage control system Table H Compliance criteria Table BB.1 Method to determine and verify time factor values (see ) Table EE.1 Typical examples of the classification of temperature sensing controls in accordance with IEC