title: COSEL Power Supply, Noise Filter 2025 Product Catalog

Summary

COSEL Power Supply, Noise Filter 2025 Product Catalog

5EMC Test6 Radio frequency electromagnetic field EN61000-4-3 11 Voltage Dip/Momentary Power Interruption EN61000-4-11This test checks immunities of equipment to effects ofelectromagnetic waves.These tests check if equipment functions normally aftermomentary voltage drop, or power failure that decreasesvoltage to 0.U7 Fast Transient/Burst EN61000-4-4This test checks immunities to burst waves by frominjecting via cable pulses that resemble the results of adischarge.0 525 t(Duration)Figure 5.11.1 Example of a Waveform of Voltage Dips8 SurgeEN61000-4-5This test checks immunities to surges by applying aspecified surge waveform.12Unit of NoiseNoise is represented with 1 [μV] as its reference in [dB].It is assumed that 1 [μV] equals 0 [dBμV].For example, 1 [V] is represented as follows:U1.00.9120Log 101×10 -6120 [dBμV]0.50.3AT210 [V] 140 [dBμV]100 [V] 160 [dBμV]1000 [V] 180 [dBμV]0.0TT1max30%Figure 5.8.1 Example of a Surge Waveform in VoltageTable 5.8.1 LevelLevel1234XOpen circuit test voltage±10% [kV]0.51.02.04.0special9 Conducted Radio-frequency Interference EN61000-4-6This test checks immunities to conducted disturbanceswhen electromagnetic waves pass into equipmentthrough a cable.t13Detection Methoda. Peak detection (PK)It detects the heights of peaks of an output waveform.b. Quasi-peak detection (QP)It detects quasi-peaks through a circuit that has timeconstants at the time of charge and discharge.Quasi-peak detection value equals an intermediatevalue between peak and average ones.This detection has high measurement results whennoise has a long duration or occurs frequently.c. Average detection (AV)It detects an average of values of an output waveform.Peak detection (PK)Quasi-peak detection (QP)10 Power Frequency Magnetic Field EN61000-4-8This test checks immunities to magnetic fields generatedby power frequency currents flowing through aninput line or a power wiring.Average detection (AV)Figure 5.13.1 Relations between Detection Methodsand Measurement LevelsEMI/EMCFilter? 773 ?Technical Notes-15