IEC 61000-4-36-2014 pdf – Electromagnetic compatibility (EMC) – Part 4-36: Testing and measurement techniques – IEMI immunity test methods for equipment and systems.
1 Scope This part of IEC 61 000 provides methods to determine test levels for the assessment of the immunity of equipment and systems to intentional electromagnetic interference (IEMI) sources. It introduces the general IEMI problem, IEMI source parameters, derivation of test limits and summarises practical test methods. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 61 000-4-4, Electromagnetic compatibility (EMC) – Part 4-4: Testing and measurement techniques – Electrical fast transient/burst immunity test IEC 61 000-4-1 2, Electromagnetic compatibility (EMC) – Part 4-12: Testing and measurement techniques – Ring wave immunity test IEC 61 000-4-1 8, Electromagnetic compatibility (EMC) – Part 4-18: Testing and measurement techniques – Damped oscillatory wave immunity test 3 Terms, definitions and abbreviations For the purposes of this document, the following terms, definitions and abbreviations apply. 3.1 Terms and defintions 3.1 .1 attenuation reduction in magnitude (as a result of absorption and/or scattering) of an electric or magnetic field or a current or voltage, usually expressed in decibels 3.1 .2 bandratio br ratio of the high and low frequencies between which there is 90 % of the energy Note 1 to entry: If the spectrum has a large dc content, the lower limit is nominally defined as 1 Hz (see IEC 61 000-2-1 3 for further details). 3.1 .3 bandratio decades brd bandratio expressed in decades as: brd = log1 0(br)
burst time frame in which a series of pulses occurs with a given repetition rate Note 1 to entry: When multiple bursts occur, the time between bursts is usually defined. 3.1 .5 conducted HPEM environment high-power electromagnetic currents and voltages that are either coupled or directly injected to cables and wires with voltage levels that typically exceed 1 kV 3.1 .6 continuous wave CW time waveform that has a fixed frequency and is continuous 3.1 .7 electromagnetic compatibility EMC ability of an equipment or system to function satisfactorily in its electromagnetic environment without introducing intolerable electromagnetic disturbances to anything in that environment 3.1 .8 electromagnetic disturbance any electromagnetic phenomenon which may degrade the performance of a device, equipment or system 3.1 .9 electromagnetic interference EMI degradation of the performance of a device, transmission channel or system caused by an electromagnetic disturbance Note 1 to entry: Disturbance and interference are respectively cause and effect. 3.1 .1 0 (electromagnetic) shield electrically continuous housing for a facility, area, or component used to attenuate incident electric and magnetic fields by both absorption and reflection 3.1 .1 1 (electromagnetic) susceptibility inability of a device, equipment or system to perform without degradation in the presence of an electromagnetic disturbance Note 1 to entry: Susceptibility is a lack of immunity. 3.1 .1 2 equipment under test EUT equipment being subjected to the test 3.1 .1 3 high-altitude electromagnetic pulse HEMP electromagnetic pulse produced by a nuclear explosion outside the earth’s atmosphere Note 1 to entry: Typically above an altitude of 30 km.
pulse repetition frequency prf number of pulses per unit time, measured in Hz (per second) 3.1 .24 radiated HPEM environment high-power electromagnetic fields with peak electric field levels that typically exceed 1 00 V/m 3.1 .25 rE far electric field normalised at a distance of 1 m from the antenna as derived from an E-field measurement at a given distance in the far-field 3.1 .26 sub-hyperband signal signal or a waveform with a pbw value between 1 00 % and 1 63,4 % or a bandratio between 3 and 1 0 3.1 .27 transient pertaining to or designating a phenomenon or a quantity which varies between two consecutive steady states during a time interval which is short compared with the time-scale of interest Note 1 to entry: A transient can be a unidirectional impulse of either polarity or a damped oscillatory wave with the first peak occurring in either polarity. 3.1 .28 ultrawideband UWB signal that has a percent bandwidth greater than 25 %