IEC 62041:2003 pdf – Power transformers, power supply units, reactors and similar products – EMC requirements.
1 Scope This international product family standard applies to independent transformers, reactors and power supply units covered by IEC 60989 and the IEC 61558 series of standards. It prescribes the electromagnetic compatibility requirements for emission and immunity in the frequency range 0 Hz to 1 000 MHz. Transformers, reactors and power supply units delivered with or incorporated in an appliance or equipment shall comply with the relevant EMC standard applicable to that appliance or equipment. However this standard may be used as a guide to test the transformers, reactors and power supply units separately before incorporating them in the appliance or equipment. This EMC standard covers only performance. Abnormal operation of the transformer, reactor and power supply unit (e.g. simulated faults in the electric circuitry for testing purposes or functional safety by influence of electromagnetic phenomena) are not taken into consideration in this standard. NOTE When the term transformer is used, it covers transformers, reactors and power supplies where applicable. This standard does not apply to: – motor-generator sets; – uninterruptible power supplies (UPS) covered by IEC 62040; – power supply units covered by IEC 61204, (i.e. DC-DC converters, DC power and distribution equipment and power supply units for use in applications covered by IEC 60950, IEC 61010-1, IEC 60601-1 and IEC 60065); – step-down converters covered by IEC61347-1 and 61347-2-2; – power supplies and converters for use with or in products covered by IEC 61347-2-2. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60989, Separating transformers, autotransformers, variable transformers and reactors
IEC 61000-4-2, Electromagnetic compatibility (EMC) – Part 4: Testing and measurement techniques – Section 2: Electrostatic discharge immunity test IEC 61000-4-3, Electromagnetic compatibility (EMC) – Part 4-3: Testing and measurement techniques – Radiated, radio-frequency, electromagnetic field immunity test IEC 61000-4-4, Electromagnetic compatibility (EMC) – Part 4: Testing and measurement techniques – Section 4: Electrical fast transient/burst immunity test IEC 61000-4-5, Electromagnetic compatibility (EMC) – Part 4: Testing and measurement techniques – Section 5: Surge immunity test IEC 61000-4-6, Electromagnetic compatibility (EMC) – Part 4: Testing and measurement techniques – Section 6: Immunity to conducted disturbances, induced by radio-frequency fields IEC 61000-4-11, Electromagnetic compatibility (EMC) – Part 4: Testing and measurement techniques – Section 11: Voltage dips, short interruptions and voltage variations immunity tests IEC 61558, Safety of power transformers, power supply units and similar CISPR 11, Industrial, scientific and medical (ISM) radio-frequency equipment – Electro- magnetic disturbance characteristics – Limits and methods of measurement 3 Terms and definitions 3.1 environment 1 environment applicable when the equipment is installed in residential, commercial or light industrial premises connected directly to the public low voltage distribution network NOTE The following list, although not comprehensive, gives an indication of locations which are included: – residential properties, e.g. houses, apartments, hotels etc.; – retail outlets, e.g. shops, supermarkets, etc.; – business premises, e.g. offices, banks, etc.; – areas of public entertainment, e.g. cinemas, public bars, dance halls, restaurants etc.; – outdoor locations, e.g. petrol stations, car parks, amusement and sports centre, etc.; – light-industrial locations, e.g. workshops, laboratories, service centres, etc.
4 Classification Transformers are classified according to the incorporation of components and electronic circuits as follows: – Category 0: transformers with or without passive protection component(s) and without electronic circuits; – Category 1: transformers with passive components, and without electronic circuits; – Category 2: transformers with electronic circuits. NOTE 1 Examples of passive protection components are: fuses, thermal links, thermal cut-outs, circuit-breakers, PTC’s, NTC’s and resistors. NOTE 2 Examples of passive components are capacitors, inductors, diodes, LED’s, relays, VDR’s. NOTE 3 Examples of electronic circuits are active semiconductors. 5 Test specifications 5.1 Immunity 5.1.1 Immunity against disturbances Transformers shall have sufficient immunity against disturbances from their surroundings. Category 0 transformers are not sensitive to normal electromagnetic perturbations and as a consequence are deemed to fulfil the immunity requirements without testing. Category 1 transformers shall fulfil the following requirements: – electrostatic discharge; NOTE 1 Some passive components like small capacitors (e.g. Y-type), diodes, LED or relays may be sensitive to electrostatic discharges. – electrical fast transient/burst; NOTE 2 Some passive components like small capacitors (e.g. Y-type), diodes, LED or relays may be sensitive to electrical fast transients. – surge. NOTE 3 Some passive components like small capacitors (e.g. Y-type), diodes, LED or relays may be sensitive to surges. The requirements are given in 22.214.171.124, 126.96.36.199 and 188.8.131.52 on a port by port basis. Category 2 transformers shall fulfil the following requirements: – electrostatic discharge; – electrical fast transient/burst; – surge; – conducted disturbances, inducted by radio-frequency fields; – radiated, radio-frequency electromagnetic fields; – voltage dips and short interruptions.