By LEIDITECH | 11 March 2024 | 0 Comments
In electromagnetic compatibilityEFTWhat are the two testing frequencies for group pulse testing，What
In terms of electromagnetic compatibility（EMC）During testing，Especially inElectrical Fast Transient（EFT）During testing，Usually two main testing frequencies are used。These two frequencies are respectively：
5 kHz： This isEFTOne of the lower frequencies in testing。5 kHzThe test is mainly used to simulate low-frequency transient interference encountered by devices on power lines，For example, starting from an electric motor、Interference caused by relay switches, etc。Shanghai Leimao Test 5KHZFrequency devices。
100 kHz： This isEFTOne of the higher frequencies in testing。100 kHzThe test is mainly used to simulate high-frequency transient interference encountered by devices on power lines，For example, bySwitching Mode Power SupplyInterference that may be introduced by high-frequency noise sources such as electronic devices。Shanghai Leimao Test 10KHZFrequency devices。
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5 kHzAnd 100 kHzFrequency is used to simulate different types of transient interference on power lines。Here are 5 kHzAnd 100 kHzSome differences between frequencies：
Test purpose：
5 kHz： Usually used for testing low-frequency interference，For example, due to the motor starting、Interference caused by relay switches, etc。
100 kHz： Used for testing high-frequency interference，Simulate the interference that high-frequency noise sources such as switching power supplies and electronic devices may introduce。
Environmental simulation：
5 kHz： More suitable for simulating typical low-frequency electromagnetic interference，For some industrial and household equipment, it may be closer to the actual situation。
100 kHz： More suitable for simulating high-frequency electromagnetic noise，For some electronic and communication devices, they may be more representative。
Device response：
5 kHz： The response of testing equipment to relatively low frequency interference，How to maintain normal operation。
100 kHz： The response of testing equipment to relatively high frequency interference，To ensure that the equipment can still maintain stability in high-frequency environments。
Standard requirements：
standard（asIEC 61000-4-4）Usually, testing requirements are specified at specific frequencies，To ensure that the equipment can operate normally in typical electromagnetic environments。Shanghai Leimao can provide you with interpretation and download of different industry standards。
When selecting the testing frequency，Usually, it is necessary to refer to the purpose and working environment of the equipment，To ensure representativeness and reliability of testing。Simulating different types of electromagnetic interference sources at different frequencies，Therefore, the test results help evaluate the device's resistance to various interferences。
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