I.S. EN IEC 60947-1:2021

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms, definitions, symbols and reference clauses
4 Classification
5 Characteristics
6 Product information
7 Normal service, mounting and transport conditions
8 Constructional and performance requirements
9 Tests
Annex A (informative) Harmonisation of utilization categories for low-voltage switchgear and controlgear
Annex B (Vacant)
Annex C (normative) Degrees of protection of enclosed equipment
Annex D (informative) Examples of clamping units and relationship between clamping unit and connecting device
Annex E (informative) Description of a method for adjusting the load circuit
Annex F (informative) Determination of short-circuit power-factor or time-constant
Annex G (informative) Measurement of creepage distances and clearances
Annex H (informative) Correlation between the nominal voltage of the supply system and the rated impulse withstand voltage of equipment
Annex J (informative) Items subject to agreement between manufacturer and user
Annex K (normative) Procedure to determine reliability data for electromechanical devices used in functional safety applications
Annex L (normative) Terminal marking and distinctive number
Annex M (normative) Flammability test
Annex N (normative) Requirements and tests for equipment with protective separation
Annex O (informative) Environmentally conscious design
Annex P (informative) Terminal lugs for low voltage switchgear and controlgear connected to copper conductors
Annex Q (normative) Special tests – Tests for environmental categories
Annex R (normative) Application of the metal foil for dielectric testing on accessible parts during operation or adjustment
Annex S (normative) Digital inputs and outputs
Annex T (normative) Extended functions within electronic overload relays
Annex U (informative) Examples of control circuit configurations
Annex V (informative) Power management with switchgear and controlgear for electrical energy efficiency
Annex W (normative) Procedure to establish material declaration
Annex X (normative) Co-ordination between circuit-breaker or CPS and another shortcircuit protective device associated in the same circuit
Bibliography

This document applies, when required by the relevant product standard, to low-voltage switchgear and controlgear hereinafter referred to as "equipment" or “device” and intended to be connected to circuits, the rated voltage of which does not exceed 1 000 V AC or 1 500 V DC.