EMC, EMI and EMS of led tube
Traditionally, EMC includes two aspects: EMI (electromagnetic interference) and EMS (electromagnetic susceptibility).
Electromagnetic compatibility (EMC) refers to the ability of a device or system to operate in compliance with the requirements in its electromagnetic environment and not produce intolerable electromagnetic interference to any device in its environment.
Therefore, EMC includes two requirements: on the one hand, the electromagnetic interference generated by the equipment in the normal operation process cannot exceed a certain limit; on the other hand, it means that the equipment has a certain degree of electromagnetic interference in the environment. The degree of immunity, that is, electromagnetic susceptibility. The so-called electromagnetic interference refers to any electromagnetic phenomenon that can degrade the performance of a device or system. The so-called electromagnetic interference refers to the performance degradation of equipment or systems caused by electromagnetic interference.
EMC is defined as <the ability of a device or system to work normally in its electromagnetic environment and not to be able to withstand electromagnetic disturbances to anything in the environment> EMI (Electro Magnetic Interference) Electromagnetic Interference EMC (Electromagnetic Compatibility) Compatible EMC=EMI+EMS EMI includes conduction, radiation, harmonics and so on.
Harmonics and flicker should be EMI, not EMS, see the introduction of the 61000-3 family standard: this section of IEC 1000-3 is concern with the limitation of voltage fluctuations and flicker impressed on the public low-voltage system. Note "Impress on" is applied instead of being applied, so harmonics and flicker are external to the equipment, not external to the equipment, so it is EMI, not EMS.
