IEEE C62.72 2016
$74.21
IEEE Guide for the Application of Surge-Protective Devices for Use on the Load Side of Service Equipment in Low-Voltage (1000 V or Less, 50 Hz or 60 Hz) AC Power Circuits
| Published By | Publication Date | Number of Pages |
| IEEE | 2016 | 110 |
Revision Standard – Active. Guidance is provided to specifiers, users and manufacturers of surge-protective devices (SPDs) about the application considerations of SPDs to power distribution systems and associated equipment. This guide applies to SPDs to be connected to the load side of the service equipment (and main over current protective device) of 50 Hz or 60 Hz ac power circuits rated 1000 V ac or less. Information on surge origins, effects of surges, number and magnitude of surge events, location categories, power distribution system (PDS) configurations, grounding and bonding, SPD specifications, SPD ratings, SPD characteristics, SPD lifetime, interactions of SPDs with a PDS, and SPD coordination considerations are provided in the guide.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | IEEE Std C62.72™-2016 Front Cover |
| 3 | Title page |
| 5 | Important Notices and Disclaimers Concerning IEEE Standards Documents |
| 8 | Participants |
| 10 | Introduction |
| 12 | Contents |
| 15 | Important Notice 1. Overview 1.1 Scope 1.2 Purpose |
| 16 | 2. Normative references 3. Definitions, acronyms, and abbreviations 3.1 Definitions |
| 18 | 3.2 Acronyms and abbreviations |
| 19 | 4. Introduction to surge protection |
| 20 | 5. Surge origins 5.1 Lightning |
| 21 | 5.2 Switching |
| 25 | 6. Effects of surges 6.1 No observed change 6.2 Upset |
| 26 | 6.3 Damage 6.4 Consequential damage 7. Number and magnitude of surge events 7.1 General 7.2 Environmental factors |
| 27 | 7.3 Changes in the power distribution system (PDS) 7.4 Rate of occurrence (versus) current level |
| 29 | 7.5 Exposure levels |
| 30 | 7.6 Risk assessments |
| 32 | 8. Location categories |
| 33 | 9. Power distribution systems |
| 36 | 9.1 System configuration |
| 37 | 9.2 System arrangement or distribution 9.3 Examples of system voltages 9.4 Available short-circuit current and SPD short-circuit current rating |
| 42 | 9.5 Voltage ratings of SPDs |
| 43 | 10. Grounded (earthed) and ungrounded (unearthed) systems 10.1 Grounded (earthed) systems |
| 44 | 10.2 Impedance (resistance) grounded systems 10.3 Ungrounded (unearthed) systems 10.4 Ferroresonance |
| 46 | 11. Grounding (earthing) and bonding |
| 47 | 11.1 SPD grounding lead and related considerations |
| 48 | 11.2 Common bonding network |
| 50 | 11.3 Grounding 11.4 Ground (earth) potential rise (GPR/EPR) |
| 51 | 12. Modes of operation |
| 52 | 12.1 Considerations for neutral-to-ground SPD application |
| 53 | 13. SPD specifications, ratings and characteristics 13.1 Measured limiting voltage |
| 57 | 13.2 SPD Surge current and Nominal Discharge Current ratings |
| 59 | 13.3 SPD maximum continuous operating voltage (MCOV) rating |
| 60 | 13.4 SPD response time |
| 61 | 13.5 Joule (energy) ratings 13.6 Rated load current, IL 13.7 Fault current interruption capability |
| 62 | 13.8 Temperature ratings 13.9 Load-side surge withstand 13.10 Voltage regulation (voltage drop) of an SPD |
| 63 | 13.11 SPD power system configuration 13.12 SPD types 13.13 SPD Enclosure Rating |
| 65 | 13.14 SPD status indicators |
| 66 | 13.15 SPD disconnectors 13.16 SPD certification and safety considerations |
| 67 | 13.17 SPD modes of protection |
| 68 | 14. SPD lifetime |
| 69 | 14.1 Overvoltage failures of SPDs |
| 70 | 14.2 Temporary overvoltages (TOVs) 15. Interactions of SPD operations in a power distribution system (PDS) |
| 71 | 15.1 Interactions with ground-fault protection (GFP) systems 15.2 Interaction of SPD operation on other protective relaying systems |
| 72 | 15.3 Interaction of SPD operation on other protective devices 16. SPD coordination considerations |
| 73 | 16.1 Surge waveform and duration |
| 75 | 16.2 SPD conductor (lead) length |
| 79 | 16.3 Distance between SPDs, types, location categories and IEC test classes |
| 82 | 16.4 Distance between the origin of a surge and the end-use equipment |
| 83 | 16.5 Surge-protective device voltage coordination |
| 84 | 16.6 Surge current capacity and Nominal Discharge Current (In) Ratings of the SPDs 16.7 Aging of SPDs |
| 85 | 16.8 Coordination of modes of protection 16.9 Power distribution system configuration |
| 86 | 16.10 SPDs integral to electrical distribution and end-use equipment |
| 87 | 16.11 Coordination of the SPD’s Short-Circuit Current Rating (SCCR) 16.12 SPDs used in a lightning-protection system (LPS) |
| 88 | 16.13 Installation in hazardous locations 16.14 Coordination methodologies |
| 89 | 16.15 SPD documentation |
| 90 | 17. Summary |
| 91 | Annex A (informative) Bibliography |
| 95 | Annex B (informative) Glossary |
| 96 | Annex C (informative) IEC earthing (grounding) practices C.1 First letter (I or T) |
| 98 | C.2 Second letter (T or N) |
| 101 | C.3 Third letter (C or S) C.4 TN-C-S Systems |
| 102 | C.5 Differences highlighted |
| 103 | Annex D (informative) Methods of transient mitigation D.1 “Attenuating” devices |
| 104 | D.2 “Diverting” devices |
| 108 | Annex E (informative) Surges created by transfer switches |
| 110 | Back Cover |
