Electromagnetic compatibility as a basic requirement
Power supplies separate the mains supply (e.g. 230 Vac or 3×400 Vac) from any low voltages created (e.g. 5 Vdc, 12 Vdc). They must ensure safe electrical separation and comply with the statutory requirements in terms of EMC. Power supplies must also be able to withstand extreme conditions and be immune against external interference, as well as protecting connected appliances, such as sensitive electronic modules.
When developing the first generation of MGV switch-mode power supplies between 1981 and 1983, control of emission and immission was a major issue, even long before EMC legislation and CE conformity came into force. Today we ensure that our power supplies offer especially high resistance and are equipped for daily use by incorporating certain immission values that are in some cases far above required standards.