|IEC 61000-4-11 Dips & Interrupts Testing|
Dips and Interrupts Background
Dips and interrupts can occur on the AC
power mains as a result of a fault in the distribution system such as an open
circuit breaker or a sudden large load being turned on in the immediate
vicinity. A power distribution system fault can cause a switch in the
distribution grid to open and close a number of times, resulting in multiple
interrupts to electrical and electronic equipment.
Electronic products are tested for immunity to dips and interrupts to insure their continued reliable operation if subjected to dips and/or interrupts on the AC power mains. The European Union’s EMC Directive mandates dips and interrupts testing for virtually all electrical and electronic products as a condition for obtaining the CE Mark before shipping products to member states of the European Union.
Generic Immunity Standards, Product Standards and Product
Family Standards require that dip and interrupt tests be performed in accordance
with Basic EMC Standards: IEC 61000-4-11 and EN 61000-4-11. Thermo KeyTek’s
Application Note, “EMC Standards Overview,” provides an overview of European
Standards for electromagnetic compatibility, describes how the Standards relate
to one another, and lists sources for procuring copyrighted documents.
Basic EMC Standard
The Basic EMC Standard for Dips and Interrupts defines methods of generating consistently reproducible electrical dips and interrupts for test purposes. They specify characteristics of the AC mains to the EUT such as peak inrush current, transition times and durations. While the Basic EMC Standard specifies how to perform Dips and Interrupts testing, the Generic, Product and Product Family Standards specify the test levels and pass/fail Performance Criteria.
|EN 50082-1||Generic Immunity - Residential, Commercial and Light Industrial||Not required|
|EN 50082-1Draft||Generic Immunity - Residential, Commercial and Light Industrial||0%, 40%, 70% & 100%|
|EN 50082-2||Generic Immunity - Industrial Environment||Not required|
|EN 50082-2Draft||Generic Immunity - Industrial Environment||0%, 40%, 70% & 100%|
|EN 55104||Immunity for Household Appliances, Tools and Similar Apparatus||0%, 40%, 70% & 100%|
Peak Inrush Current
The test for inrush current is performed by switching the generator from 0% to 100% at both 90Ţ and 270Ţ to insure sufficient peak inrush current drive capability for both polarities.
Rise and fall times of PQF™
EUT Performance Criteria
Dip and Interrupt Simulators
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