BS EN 62020:1999

Foreword
Introduction
1 Scope
2 Normative references
3 Definitions
    3.1 Definitions relating to currents flowing from
          live parts to earth
    3.2 Definitions relating to the energization of an
          RCM
    3.3 Definitions relating to the operation and to the
          functions of residual current monitors
    3.4 Definitions relating to values and ranges of
          energizing quantities
    3.5 Definitions relating to values and ranges of
          influencing quantities
    3.6 Definitions relating to terminals
    3.7 Conditions of operation
    3.8 Test
4 Classification
    4.1 According to the method of operation
    4.2 According to the type of installation
    4.3 According to the number of current paths
    4.4 According to the ability to adjust the residual
          operating current
    4.5 According to the possibility of adjusting the
          time-delay
    4.6 According to the protection against external
          influences
    4.7 According to the method of mounting
    4.8 According to the method of connection
    4.9 According to the type of connection of the load
          conductors
    4.10 According to fault indicating means
    4.11 According to ability to directionally discriminate
          between supply side and load side residual currents
5 Characteristics of RCMs
    5.1 Summary of characteristics
    5.2 Rated quantities and other characteristics
    5.3 Standard and preferred values
    5.4 Coordination with short-circuit protective devices
          (SCPDs) (only valid for RCMs classified according
          to 4.9.2)
6 Marking and other product information
7 Standard conditions for operation in service and for
    installation
    7.1 Standard conditions
    7.2 Conditions of installation
8 Requirements for construction and operation
    8.1 Mechanical design
    8.2 Protection against electric shock
    8.3 Dielectric properties
    8.4 Temperature rise
    8.5 Operating characteristic
    8.6 Directional discrimination
    8.7 Operational endurance
    8.8 Performance at short-circuit currents
    8.9 Resistance to mechanical impact
    8.10 Resistance to heat
    8.11 Resistance to abnormal heat and to fire
    8.12 Test device
    8.13 Correct operation RCMs within the supply voltage
          range
    8.14 Behaviour of RCMs in case of overcurrents in the
          main circuit
    8.15 Resistance of RCMs to unwanted tripping due to
          current surges caused by impulse voltages
    8.16 Behaviour of RCMs in case of earth fault currents
          comprising d.c. components
    8.17 Reliability
    8.18 Electromagnetic compatibility (Based on IEC 61543)
    8.19 Connection of an external current transformer (CT)
9 Tests
    9.1 General
    9.2 Test conditions
    9.3 Test of indelibility of marking
    9.4 Test of reliability of screws, current-carrying parts
          and connections
    9.5 Test of reliability of terminals for external
          conductors
    9.6 Verification of protection against electric shock
    9.7 Test of dielectric properties
    9.8 Test of temperature rise
    9.9 Verification of operating characteristics
    9.10 Verification of operation endurance
    9.11 Verification of short-circuit withstand capability
    9.12 Verification of resistance to mechanical impact
    9.13 Test of resistance to heat
    9.14 Test of resistance to abnormal heat and to fire
    9.15 Verification of the operation of the test device
          at the limits of rated voltage
    9.16 Verification of limiting values of the non-operating
          current under overcurrent conditions
    9.17 Verification of resistance against unwanted
          operation due to current surges caused by impulse
          voltages
    9.18 Verification of resistance of the insulation against
          impulse voltages
    9.19 Verification of the correct operation at residual
          currents with d.c. components
    9.20 Verification of reliability
    9.21 Verification of ageing of electronic components
    9.22 Verification of EMC requirements
    9.23 Response of the RCM to temporary overvoltages
          on the LV-side, due to fault conditions on the HV-side
Annex A (normative) Test sequence and number of samples to be
                     submitted for verification of conformity to
                     the standard
Annex B (normative) Determination of clearances and creepage
                     distances
Annex ZA (normative) Normative references to international
                     publications and their corresponding European
                     publications

Specification for residual current monitors designed to monitor electrical installations or circuits for the presence of unbalanced earth fault currents.