CISPR 11

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Overview (DIY?)

CISPR 11 is the International Standard for electromagnetic emissions (disturbances) from industrial, scientific and medical electrical equipment operating in the frequency range 0 Hz to 400 GHz and to domestic and similar appliances designed to generate and/or use locally radio-frequency energy.

Conducted emission limits are specified for the two equipment groups for AC mains power ports and DC power ports. As an example, the AC-port conducted limits for Group 1 equipment are shown for both Class A and Class B. Note the significantly lower emission limit under Class B, with Class B being more restrictive than Class A.

The EMC Shop stocks everything needed to setup a self certification CISPR 11 lab in house. New, used and rental options are availavle for CISPR 11 testing equipment. Purchasing everything with a shielded room or anechoic chamber can break the budget. The EMC Shop works with customers to acquire test equipment in stages, bringing the CISPR 11 lab up to speed based on test standards MOST needed initially.

The Difference Between The Classes

Class A is defined as “equipment suitable for use in all locations other than those allocated in residential environments and those directly connected to a low voltage power supply network which supplies buildings used for domestic purposes.” In other words, industrial and heavy commercial equipment.

Class B equipment is “suitable for use in locations in residential environments and in establishments directly connected to a low voltage power supply network which supplies buildings used for domestic purposes.” These are the devices typically used in a home or in light commercial applications.

CISPR 11 Limit Lines for Conducted Emissions

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