IEC 62020 : 1.1

ELECTRICAL ACCESSORIES - RESIDUAL CURRENT MONITORS FOR HOUSEHOLD AND SIMILAR USES (RCMS)

International Electrotechnical Committee

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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 of 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 the operating characteristics
  9.10 Verification of operational 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
Figures
Tables

Abstract

Applies to residual current monitors having rated voltages not exceeding 440 V a.c. and rated currents not exceeding 125 A for household and similar purposes.