IEC 61095:2009

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
  3.1 General terms
  3.2 Switching devices
  3.3 Parts of switching devices
  3.4 Operation of switching devices
  3.5 Characteristic quantities
4 Classification
5 Characteristics of contactors
  5.1 Summary of characteristics
  5.2 Type of contactor
      5.2.1 Number of poles
      5.2.2 Method of control
  5.3 Rated and limiting values for main circuits
      5.3.1 General
      5.3.2 Rated voltages
      5.3.3 Currents or powers
      5.3.4 Rated frequency
      5.3.5 Rated duties
      5.3.6 Normal load and overload characteristics
      5.3.7 Rated conditional short-circuit current
  5.4 Utilization category
      5.4.1 General
      5.4.2 Assignment of utilization categories based on
             the results of tests
  5.5 Control circuits
  5.6 Auxiliary circuits
  5.7 Co-ordination with short-circuit protective devices
6 Product information
  6.1 Nature of information
      6.1.1 Identification
      6.1.2 Characteristics, basic rated values and utilization
  6.2 Marking
  6.3 Instructions for installation, operation and maintenance
7 Normal service, mounting and transport conditions
  7.1 Normal service conditions
      7.1.1 Ambient air temperature
      7.1.2 Altitude
      7.1.3 Atmospheric conditions
      7.1.4 Normal electromagnetic environmental conditions
  7.2 Conditions during transport and storage
  7.3 Mounting
8 Constructional and performance requirements
  8.1 Constructional requirements
      8.1.1 General
      8.1.2 Materials
      8.1.3 Strength of screws or nuts other than those on
             terminals which are intended to be operated
             during installation or maintenance
      8.1.4 Vacant
      8.1.5 Actuator
      8.1.6 Indication of the OFF and ON positions
      8.1.7 Terminals
      8.1.8 Additional requirements for contactors provided
             with a neutral pole
      8.1.9 Provisions for earthing
      8.1.10 Enclosures
      8.1.11 Degrees of protection of enclosed contactors
      8.1.12 Resistance to impact
      8.1.13 Durability of markings
  8.2 Performance requirements
      8.2.1 Operating conditions
      8.2.2 Temperature-rise
      8.2.3 Dielectric properties
      8.2.4 Normal load and overload performance requirements
      8.2.5 Co-ordination with short-circuit protective devices
  8.3 Electromagnetic compatibility
      8.3.1 Immunity
      8.3.2 Emission
9 Tests
  9.1 Types of test
      9.1.1 General
      9.1.2 Type tests
      9.1.3 Routine tests
      9.1.4 Sampling tests for clearance verification
  9.2 Compliance with constructional requirements
      9.2.1 General
      9.2.2 Materials
      9.2.3 Test on screws or nuts other than those on
             terminals which are intended to be operated during
             installation or maintenance
      9.2.4 Verification of the degrees of protection of
             enclosed contactors
      9.2.5 Mechanical properties of terminals
      9.2.6 Test of resistance to impact
      9.2.7 Test of durability of marking
  9.3 Compliance with performance requirements
      9.3.1 Test sequences
      9.3.2 General test conditions
      9.3.3 Performance under no load, normal load and
             overload conditions
      9.3.4 Performance under short-circuit conditions
      9.3.5 Overload current withstand capability
      9.3.6 Routine tests
Annex A (normative) Terminal marking and distinctive number
Annex B (normative) Test sequences and number of samples
Annex C (normative) Description of a method for adjusting the
                    load circuit
Annex D (normative) Determination of short-circuit power-factor
Annex E (normative) Measurement of creepage distances and
                    clearances
Annex F (normative) Correlation between the nominal voltage of
                    the supply system and the rated impulse
                    withstand voltage of a contactor
Annex G (normative) Hot wire ignition test
Annex H (normative) Degrees of protection of enclosed contactor
Annex I (normative) Requirements and tests for equipment with
                    protective separation

IEC 61095:2009 applies to electromechanical air break contactors for household and similar purposes provided with main contacts intended to be connected to circuits the rated voltage of which does not exceed 440 V a.c. (between phases) with rated operational currents less than or equal to 63 A for utilization category AC-7a and 32 A for utilization categories AC-7b and AC-7c, and rated conditional short-circuit current less than or equal to 6 kA. This second edition cancels and replaces the first edition published in 1992 and its Amendment 1 (2000), and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- deletion of switching overvoltages requirements,
- addition of a new utilization category AC-7c: switching of compensated electric discharge lamp control,
- measuring of U_imp required, but the marking is not required if U_imp equal to 4 kV,
- improvement regarding marking concerning direction of movement,
- improvement of dielectric properties,
- test of resistance to humidity referred to IEC 60068-2-78 instead of IEC 60068-2-3,
- amendment to Table B.1 regarding test sequences,
- deletion of Table F.2 regarding the correspondence between the nominal voltage of the supply system and the contactor rated impulse withstand voltage,
- addition of a new Annex H (normative): degrees of protection of enclosed contactor,
- addition of a new Annex I (normative): requirements and tests for equipment with protective separation.