BSI 18/30347379 DC:2018 Edition
$24.66
BS EN IEC 62020-1. Electrical accessories. Residual current monitors for household and similar uses (RCMs)
| Published By | Publication Date | Number of Pages |
| BSI | 2018 | 109 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 10 | FOREWORD |
| 12 | Introduction 1 Scope 2 Normative references |
| 13 | 3 Terms and definitions |
| 14 | 3.1 Definitions relating to currents flowing from live parts to earth 3.2 Definitions relating to the energization of an RCM |
| 15 | 3.3 Definitions relating to the operation and to the functions of residual current monitors |
| 17 | 3.4 Definitions relating to values and ranges of energizing quantities |
| 18 | 3.5 Definitions relating to values and ranges of influencing quantities 3.6 Definitions relating to terminals |
| 19 | 3.7 Conditions of operation |
| 20 | 3.8 Test 4 Classification 4.1 According to the method of operation 4.1.1 RCM functionally dependent on line voltage 4.1.2 RCM functionally dependent on an energy source other than line voltage 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 |
| 21 | 4.9 According to the type of connection of the load conductors 4.9.1 RCM to which the monitored line is not directly connected 4.9.2 RCM to which the monitored line is directly connected 4.10 According to fault indicating means 4.11 According to ability to directionally discriminate between supply side and load side residual currents 4.12 According to the supply system 4.12.1 RCM for use in AC supply system 4.12.2 RCM for use in DC supply system 4.13 According to the type of residual current monitored 4.14 According to the method of residual current detection 5 Characteristics of RCMs 5.1 Summary of characteristics |
| 22 | 5.2 Rated quantities and other characteristics 5.2.1 Rated voltage 5.2.1.1 Rated operational voltage (Ue) 5.2.1.2 Rated insulation voltage (Ui) 5.2.1.3 Rated voltage of the monitored circuit (Uem) 5.2.1.4 Rated insulation voltage of the monitored circuit (Uim) 5.2.2 Rated current (In) 5.2.3 Rated residual operating current (I(n) |
| 23 | 5.2.4 Rated residual non-operating current (I(no) 5.2.5 Rated frequency 5.2.6 Operating characteristics 5.2.6.1 RCM Type AC 5.2.6.2 RCM Type A 5.2.6.3 RCM Type F 5.2.6.4 RCM Type B 5.2.7 Insulation coordination including clearances and creepage distances |
| 24 | 5.3 Standard and preferred values 5.3.1 Preferred values of rated voltage (Un) 5.3.2 Preferred values of rated current (In) 5.3.3 Preferred values of rated residual operating current (I(n) 5.3.4 Standard value of residual non-operating current (I(no) 5.3.5 Standard minimum value of non-operating overcurrent in case of a multiphase balanced load through a multipath RCM (see 3.4.2.1) 5.3.6 Standard minimum value of the non-operating overcurrent through an RCM (see 3.4.2.2) 5.3.7 Preferred values of rated frequency |
| 25 | 5.3.8 Standard and preferred values of the rated conditional short-circuit current (Inc) (only applicable to RCMs classified according to 4.9.2) 5.3.8.1 Values up to and including 10 000 A 5.3.8.2 Values above 10 000 A 5.3.9 Maximum actuating time (Tmax) 5.3.10 Minimum non-actuating time (Tmin) 5.4 Coordination with short-circuit protective devices (SCPDs) (only valid for RCMs classified according to 4.9.2) 5.4.1 General 5.4.2 Rated conditional short-circuit current (Inc) 5.4.3 Rated conditional residual short-circuit current (I(c) |
| 26 | 6 Marking and other product information |
| 27 | 7 Standard conditions for operation in service and for installation 7.1 Standard conditions |
| 28 | 7.2 Conditions of installation 8 Requirements for construction and operation 8.1 Mechanical design 8.1.1 General 8.1.2 Features |
| 29 | 8.1.3 Clearances and creepage distances (see also Annex B) |
| 30 | 8.1.4 Screws, current-carrying parts and connections 8.1.5 Terminals for external conductors |
| 32 | 8.2 Protection against electric shock |
| 33 | 8.3 Dielectric properties 8.4 Temperature rise 8.4.1 Temperature rise limits |
| 34 | 8.4.2 Ambient air temperature 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 |
| 35 | 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 |
| 36 | 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 DC components 8.17 Reliability 8.18 Electromagnetic compatibility (based on IEC 61543) 8.18.1 Low frequency electromagnetic phenomena 8.18.2 High frequency immunity 8.18.3 Electrostatic discharges 8.18.4 Electromagnetic emission 8.19 Connection of an external current transformer (CT) |
| 37 | 8.20 Response to temporary overvoltages on the LV-side due to fault conditions on the HV-side 9 Tests 9.1 General |
| 38 | 9.2 Test conditions 9.3 Test of indelibility of marking |
| 39 | 9.4 Test of reliability of screws, current-carrying parts and connections |
| 40 | 9.5 Test of reliability of terminals for external conductors |
| 41 | 9.6 Verification of protection against electric shock |
| 42 | 9.7 Test of dielectric properties 9.7.1 Resistance to humidity 9.7.1.1 Preparation of the RCM for the test 9.7.1.2 Test conditions 9.7.1.3 Test procedure 9.7.1.4 Condition of the RCM after the test 9.7.2 Insulation resistance of the RCM |
| 43 | 9.7.3 Dielectric strength of the RCM |
| 44 | 9.7.4 Insulation resistance and dielectric strength of auxiliary circuits 9.7.5 Secondary circuit of detection transformers |
| 45 | 9.7.6 Capability of the RCM to withstand high DC voltages due to insulation measurements 9.7.7 Verification of impulse withstand voltages 9.7.7.1 General testing procedure for the impulse withstand voltage tests |
| 46 | 9.7.7.2 Verification of clearances with the impulse withstand voltage |
| 47 | 9.8 Test of temperature rise 9.8.1 Ambient air temperature 9.8.2 Test procedure 9.8.3 Measurement of the temperature rise of parts |
| 48 | 9.8.4 Temperature rise of a part 9.9 Verification of the operating characteristics 9.9.1 Test circuit 9.9.2 Off-load tests with residual sinusoidal alternating currents at the reference temperature of 20 C ± 2 C |
| 49 | 9.9.3 Verification of the correct operation with load at the reference temperature 9.9.4 Verification of the connection and the function of an external current transformer (CT) |
| 50 | 9.9.5 Verification of directional discrimination for RCMs classified according to 4.11 9.10 Verification of operational endurance 9.10.1 General |
| 51 | 9.10.2 Test procedure 9.10.2.1 Circuit for the cycling test 9.10.2.2 Endurance of alarm(s) 9.11 Verification of short-circuit withstand capability 9.11.1 List of the short-circuit tests 9.11.2 Short-circuit tests 9.11.2.1 General conditions for test |
| 55 | 9.11.2.2 Verification of the coordination between the RCM and the SCPD |
| 56 | 9.12 Verification of resistance to mechanical impact |
| 58 | 9.13 Test of resistance to heat |
| 59 | 9.14 Test of resistance to abnormal heat and to fire |
| 60 | 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 9.16.1 Verification of the limiting value of overcurrent in case of a load through an RCM with two current paths 9.16.2 Verification of the limiting value of overcurrent in case of a single phase load through a three-pole or four-pole RCM |
| 61 | 9.16.3 Verification of the limiting value of overcurrent in case of a single phase load through an RCM with an external detecting device (transformer) 9.17 Verification of resistance against unwanted operation due to current surges caused by impulse voltages |
| 62 | 9.18 Void 9.19 Additional verification of the correct operation at residual currents with DC components 9.19.1 General |
| 64 | 9.19.2 Verification of the correct operation for RCM Type A, Type F and Type B 9.19.2.1 Verification of the correct operation in case of a continuous rise of the residual pulsating direct current 9.19.2.2 Verification of the correct operation in case of suddenly appearing residual pulsating direct currents 9.19.2.3 Verification at the reference temperature of the correct operation with load |
| 65 | 9.19.2.4 Verification of the correct operation in case of residual pulsating direct currents superimposed by smooth direct current of 0,006 A 9.19.3 Verification of correct operation for RCM Type F and Type B 9.19.3.1 Increase of composite residual current 9.19.3.2 Four-pole RCM Type F powered on two poles 9.19.3.3 Residual pulsating direct currents in presence of a standing smooth direct current |
| 66 | 9.19.3.4 Sudden appearance of composite residual current 9.19.4 Verification of correct operation for RCM Type B 9.19.4.1 General 9.19.4.2 Residual sinusoidal alternating currents that differ from the rated frequency 50/60 Hz |
| 67 | 9.19.4.3 Residual pulsating direct current superimposed on a residual smooth direct current 9.19.4.4 Residual direct currents as a result of rectifying circuits supplied from two phases |
| 68 | 9.19.4.5 Residual direct currents as a result of rectifying circuits supplied from three phases 9.19.4.6 Residual smooth direct current 9.19.4.7 Three- and four-pole RCM Type B powered by two poles 9.19.4.8 Verification of the correct operation in case of suddenly appearing residual smooth direct currents 9.20 Verification of reliability |
| 69 | 9.20.1 Climatic test 9.20.1.1 Test chamber 9.20.1.2 Severity 9.20.1.3 Testing procedure |
| 70 | 9.20.1.4 Recovery 9.20.1.5 Final verification 9.20.2 Test with temperature of 40 C 9.21 Verification of ageing of electronic components |
| 71 | 9.22 Verification of EMC requirements |
| 73 | 9.23 Response of the RCM to temporary overvoltages on the LV-side, due to fault conditions on the HV-side |
| 102 | Annex A (normative) Test sequence and number of samples to be submitted for verification of conformity to the standard A.1 Test sequences |
| 103 | A.2 Number of samples to be submitted for full test procedure A.3 Number of samples to be submitted for simplified test procedures in case of submitting simultaneously a range of RCMs of the same fundamental design |
| 106 | Annex B (normative) Determination of clearances and creepage distances |
| 109 | Bibliography |
