Electromagnetic Compatibility
Electromagnetic compatibility (EMC) describes the reliability of electrical and electronic equipment under electromagnetic irradiation (interference immunity), as well as the level of electromagnetic interference caused by this equipment on other devices (interference emission).
In recent years, EMC has become an increasingly important factor in the development of electrical equipment and facilities. Certain guidelines and legal requirements have to be observed.
Interference emission
Interference emission is defined as electromagnetic radiation that is emitted by electrical and electronic parts or devices. It is not permitted to interfere with the function of adjacent equipment.
Non-permissible emitted interference must be avoided by providing the devices with appropriate screening measures.
Susceptibility
Susceptibility, one aspect of the EMC inspection, describes the immunity of electronic devices and systems to electromagnetic interference. A higher level of susceptibility contributes to the reliability and therefore to greater availability of this equipment.
Susceptibility is characterized by the following interference phenomena and simulation methods:
Electrostatic discharge at a vending machine
- Electrostatic discharges (ESD)
- Low-energy transient disturbances – burst (such as from electrical switching stations)
- High-energy transient disturbances – surge (such as lightning discharges or electrical power installations)
- Sinusoidal or narrowband interference sources
- Electromagnetic HF fields (line-conducted, radiated)
- Dynamic line voltages changes