SN EN 60947-3 : 1999 AMD 1 2001

1 General
    1.1 Scope
    1.2 Normative references
2 Definitions
3 Classification
    3.1 According to the utilization category
    3.2 According to the method of operation of
          manually operated equipment
    3.3 According to suitability for isolation
    3.4 According to the degree of protection provided
4 Characteristics
    4.1 Summary of characteristics
    4.2 Type of equipment
          4.2.1 Number of poles
          4.2.2 Kind of current
          4.2.3 Number of positions of the main
                   contacts (if more than two)
    4.3 Rated and limiting values for the main circuit
          4.3.1 Rated voltages
          4.3.2 Currents
          4.3.3 Rated frequency
          4.3.4 Rated duty
          4.3.5 Normal load and overload
                  characteristics
          4.3.6 Short-circuit characteristics
    4.4 Utilization category
    4.5 Control circuits
    4.6 Auxiliary circuits
    4.7 Relays and releases
    4.8 Vacant
    4.9 Switching overvoltages
5 Product information
    5.1 Nature of information
    5.2 Marking
    5.3 Instructions for installation, operation and
          maintenance
6 Normal service, mounting and transport conditions
7 Constructional and performance requirements
    7.1 Constructional requirements
    7.2 Performance requirements
          7.2.1 Operating conditions
          7.2.2 Temperature rise
          7.2.3 Dielectric properties
          7.2.4 Ability to make and break under no-load,
                  normal load and overload conditions
          7.2.5 Ability to make, break or withstand
                  short-circuit currents
          7.2.6 Switching overvoltages
          7.2.7 Additional performance requirements for
                  equipment suitable for isolation
          7.2.8 Vacant
          7.2.9 Overload requirements for equipment
                  incorporating fuses
    7.3 Electromagnetic compatibility
          7.3.1 Vacant
          7.3.2 Immunity
          7.3.3 Emission
8 Tests
    8.1 Kind of tests
          8.1.1 General
          8.1.2 Type tests
          8.1.3 Routine tests
          8.1.4 Sampling tests
          8.1.5 Special tests
    8.2 Type tests for constructional requirements
    8.3 Type tests for performance
          8.3.1 Test sequences
          8.3.2 General test conditions
          8.3.3 Test sequence I: General performance
                  characteristics
          8.3.4 Test sequence II: Operational
                  performance capability
          8.3.5 Test sequence III: short-circuit
                  performance capability
          8.3.6 Test sequence IV: Conditional
                  short-circuit current
          8.3.7 Test sequence V: Overload performance
                  capability
    8.4 Electromagnetic compatibility tests
          8.4.1 Immunity
          8.4.2 Emission
    8.5 Special tests
Annexes
A (normative) Equipment for direct switching of a
    single motor
B (informative) Items subject to agreement between
    manufacturer and user
ZA (normative) Normative references to international
    publications with their corresponding European
    publications
Figure 1 - Actuator applied force F
Tables
1 - Summary of equipment definitions
2 - Utilization categories
3 - Verification of rated making and breaking
      capacities (see 8.3.3.3) - Conditions for making
      and breaking corresponding to the various
      utilization categories
4 - Verification of operational performance - Number
      of operating cycles corresponding to the rated
      operational current
5 - Test circuit parameters for table 4
6 - Immunity tests
7 - Emission limits
8 - Actuator test force
9 - List of type tests applicable to a given equipment
10 - Overall scheme of test sequences
11 - Test sequence I: General performance
      characteristics
12 - Dielectric test voltage corresponding to the
      rated insulation voltage
13 - Test sequence II: Operational performance
      capability
14 - Test sequence III: Short-circuit performance
      capability
15 - Test sequence IV: Conditional short-circuit
      current
16 - Test sequence V: Overload performance capability
A.1 - Utilization categories
A.2 - Rated making and breaking capacity conditions
A.3 - Relationship between current broken /c and
      off-time for the verification of the rated making
      and breaking capacities
A.4 - Operational performance conditions for making and
      breaking corresponding to several utilization
      categories
A.5 - Verification of the number of on-load operating
      cycles - Conditions for making and breaking
      corresponding to several utilization categories

States the characteristics of the equipment; the conditions with which the equipment shall comply; the tests for confirming that these conditions have been met and the methods to be used for these tests; and the information to be made available by the manufacturer or to be marked on the equipment. Applies to disconnectors, switches, switch-disconnectors and fuse-combination units to be used in motor circuits and distribution circuits of which the rated voltage is not over 1,000 V a.c. or 1,500 d.c. Does not include the additional requirements needed for electrical apparatus for explosive gas atmospheres.