IEC 61000-4-11 (Edition 3.0)
Electromagnetic Compatibility (EMC)- Part 4-11: Voltage dips, short interruptions and voltage variations immunity tests for equipment with input current up to 16 A per phase
EMC Tests are tests that check the electromagnetic compatibility of a device or system. In the Electromagnetic Compatibility Test (EMC Test), it is aimed to operate any electrical and electronic device or system without being affected by and affecting other devices or systems in the environment. EMC Test is generally examined in two categories as Immune EMC Test and Emission EMC Test. Test limit values and test methods specified in the standards used in EMC Test applications may vary according to the features of the device or system.
Voltage dips, short interruptions and voltage variations immunity tests specified in IEC 61000-4-11 standard is one of the Electromagnetic Compatibility (EMC) immunity tests (EMC Test).
IEC 61000-4-11 standard covers electromagnetic compatibility (EMC) immunity test methods and preferred test levels group regarding voltage dips, short interruptions and voltage variations for electrical and electronic devices connected to low voltage power supply networks. covers.
The purpose of the IEC 61000-4-11 standard is to establish a common and repeatable basis for the evaluation of the operating qualities of electrical and electronic equipment subjected to voltage dips, short interruptions and voltage fluctuations.
Voltage dips, short interruptions and voltage variations immunity tests
The regarding voltage dips, short interruptions and voltage variations immunity test is applied to electrical and electronic devices with a rated input current not exceeding 16 A per phase for connections made in 50 Hz or 60 Hz AC networks.
Electrical and electronic equipment can be affected by voltage dips, short interruptions and voltage fluctuations in the power supply. Voltage dips and short interruptions can be caused by faults in the mains and faults in assemblies or sudden changes in load. Sometimes multiple dips or interruptions can occur in a row. Voltage variations can be caused by constantly changing loads connected to the power network.
The test levels of Voltage dips, short interruptions and voltage variations, which are one of the Electromagnetic Compatibility Tests (EMC Test), are as follows;
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Class
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Voltage Dips (50Hz/60Hz) |
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Class 1 |
Case-by-case according to the equipment requirements |
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Class 2 |
0,5 cycle %0 |
1 cycle %0 |
25/30 cycle %70 |
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Class 3 |
0,5 cycle %0 |
1 cycle %0 |
10/12 cycle %40 |
25/30 cycle %70 |
250/300 cycle %80 |
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Class x |
x |
x |
x |
x |
x |
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“x” can be defined by product committee. |
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Class |
Short Interruptions (50Hz/60Hz) |
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Class 1 |
Case-by-case according to the equipment requirements |
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Class 2 |
250/300 cycle %0 |
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Class 3 |
250/300 cycle %0 |
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Class x |
x |
|
“x” can be defined by product committee. |
|
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Voltage Variations (50Hz/60Hz) |
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Voltage Test Level |
Time for decreasing voltage |
Time at reduced voltage
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Time for increasing voltage |
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%70 |
Abrupt |
1 cycle |
25/30 cycle |
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x |
x |
x |
x |
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“x” can be defined by product committee. |
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In voltage dips and short interruptions, the voltage variations with UT is instantaneous. The test voltage levels corresponding to the dips with a residual voltage of 0%, 40%, 70% and 80% are used in % UT.
For voltage variations, UT considers a defined transition between the rated voltage and the varying voltage. Voltage variation occurs for a short time and may occur due to load variation.