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Xinhongtai HOTLCD has added a new fast transient pulse group tester (EFT), which is a good assistant for reliability testing.

Our company has purchased a new Electrical Fast Transient Pulse Group Tester (EFT), and a good assistant has been added to the reliability test project. Electrical fast transient pulse group tester can test whether the product meets the technical requirements of IEC61000-4-4 GB/T17626.4.

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The point fast transient pulse group anti-jamming experiment aims at verifying the anti-jamming ability of the instantaneous disturbance caused by lightning, grounding fault or switching inductance load. This experiment is a kind of pulse group experiment which is composed of many fast transient pulses coupled to power supply lines, control lines and signal lines.


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Major sources of electromagnetic disturbance in electronic and electrical products

Switching circuit of switching power supply for equipment: the main frequency of disturbance source is tens of kHz to more than 100 kHz, and the high-order harmonics can extend to tens of MHz.

Rectifier circuit of DC power supply for equipment: the upper limit of power frequency rectifier noise frequency can be extended to hundreds of kHz; the upper limit of high frequency rectifier noise frequency can be extended to tens of MHz.

Brush noise of DC motor for electric equipment: The upper limit of noise frequency can be extended to hundreds of MHz.

Operating noise of AC motor for electric equipment: High harmonics can extend to tens of MHz.

Disturbance Emission from Frequency Converter Circuit: Disturbance Source Frequency from Dozens of kHz to Dozens of MHz

Switching noise for switching equipment operation status: The upper limit of noise frequency can be extended to hundreds of MHz.


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