LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR - OVERCURRENT PROTECTIVE DEVICES - PART 1: APPLICATION OF SHORT-CIRCUIT RATINGS
International Electrotechnical Committee
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Alphabetical list of definitions and characteristics
4 Principle of application - Installation
5 Characteristics - Low-voltage assemblies (switchboard,
distribution board, etc.)
6 Characteristics - Switching devices
6.1 General
6.2 Switching devices - Self-protection against short-circuit
6.3 Switching devices - Application as SCPD
6.3.1 Fuse-combination units and fuses as SCPD
6.3.2 Circuit-breakers to IEC 60947-2 as SCPD
6.3.3 Control and protective switching devices (CPS)
according to IEC 60947-6-2 as SCPD
6.3.4 Circuit-breakers according to IEC 60898-1 (MCBs)
and residual current operated circuit-breaker with
integral overcurrent protection (RCBOs) according
to IEC 61009-1 as SCPD
7 Examples of the practical application of the product
characteristics
7.1 General
7.2 Protection of cables
7.3 Short-circuit protection for LV assemblies
7.3.1 Switchgear and controlgear assemblies
(switchboard/motor-control centre (MCC))
7.3.2 Busbar trunking systems (BTS)
7.4 Short-circuit protection for contactors and starters
7.4.1 General
7.4.2 Protected switching device and protected starter
7.4.3 Control and protective switching device (CPS)
according to IEC 60947-6-2
7.5 Short-circuit protection using circuit-breakers for
household and similar installations according to
IEC 60898-1 (usually known as MCBs) and residual
current operated circuit-breakers with integral
overcurrent protection (RCBOs) according to
IEC 61009-1
Annex A (informative) Interpolation of the suitability of an
alternative SCPD for the protection of contactors and
starters (substitution)
Bibliography
Serves as an application guide for the short-circuit ratings given in IEC standards for low-voltage switchgear and controlgear and assemblies, summarises the definitions of the ratings and provides examples of their application.
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | TC 17 |
