IEEE C62.42.4 2020
$30.33
IEEE Guide for the Application of Surge-Protective Components in Surge Protective Devices and Equipment Ports–Part 4: Thermally Activated Current Limiters
| Published By | Publication Date | Number of Pages |
| IEEE | 2020 | 31 |
New IEEE Standard – Active. Surge protective components (SPCs) used in power and telecom surge protective devices (SPDs) and equipment ports are covered in the IEEE C62.42 guide series. Positive temperature coefficient (PTC) thermistor components are covered in this part. These SPCs are operated by self-heating and is automatically reset after the end of the overcurrent condition without the need for manual intervention. The two types of body material, polymer and ceramic, are covered in this guide. These components are referred to as follows: a) polymer positive temperature coefficient (PPTC) thermistors and b) ceramic positive temperature coefficient (CPTC) thermistors. Overview, construction, operation, production, ratings, characteristics, and application examples are topics covered in this guide.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | IEEE Std C62.42.4™-2020 Front cover |
| 2 | Title page |
| 4 | Important Notices and Disclaimers Concerning IEEE Standards Documents |
| 7 | Participants |
| 8 | Introduction |
| 9 | Contents |
| 10 | 1. Overview 1.1 Scope |
| 11 | 1.2 Word usage 2. Normative references 3. Definitions, acronyms, abbreviations, and graphical symbols 3.1 Definitions |
| 13 | 3.2 Acronyms and abbreviations |
| 14 | 3.3 Graphical symbol 4. Overview of PTC thermistors 4.1 PTC thermistor resistance |
| 15 | 4.2 Polymeric and ceramic material resistance change 4.3 PTC thermistor overcurrent operation |
| 16 | 5. Polymeric PTC thermistor 5.1 Production |
| 17 | 5.2 Properties 5.3 Operation |
| 18 | 5.4 Characteristics |
| 19 | 5.5 Ratings 6. Ceramic PTC thermistors 6.1 Production 6.2 Properties |
| 21 | 6.3 Operation 6.4 Characteristics |
| 22 | 6.5 Ratings 7. Characteristics 7.1 General 7.2 Resistance, R |
| 23 | 7.3 Hold current, Ih and trip current, It 7.4 Time-to-trip, ttrip |
| 25 | 7.5 Resistance 1 h after tripping, R1 for polymer PTC thermistors 7.6 impulse resistance, Rimp for ceramic PTC thermistors |
| 26 | 8. Ratings 8.1 General 8.2 Impulse voltage withstand 8.3 AC power fault |
| 27 | 8.4 Impulse endurance test 8.5 AC endurance test (PTC thermistor) 9. Applications 9.1 General 9.2 Telecom plain old telephone systems (POTS) protection |
| 28 | 9.3 Power supply overcurrent protection 9.4 Battery packs 9.5 Loudspeaker |
| 29 | 9.6 Motors 9.7 Heaters |
| 30 | Annex A (informative) Bibliography |
| 31 | Back cover |
