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Floating electronic equipment electric rapid transient pulse group protection method

A technology of electronic equipment and transient pulses, applied in the direction of measuring electrical variables, measuring electricity, measuring devices, etc., can solve the problems of electronic and electrical equipment reliable work influence, testing, display disorder, etc., and achieve the effect of avoiding EFT interference

Inactive Publication Date: 2015-10-07
江苏益邦电力科技有限公司
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AI Technical Summary

Problems solved by technology

This kind of transient disturbance energy is small, and generally does not cause damage to equipment, but because of its wide spectrum distribution, it will affect the reliable operation of electronic and electrical equipment
Because the pulse group continuously charges the semiconductor junction capacitance in the line, when the energy on the junction capacitance accumulates to a certain level, it will cause the malfunction of the equipment and cause the equipment to work abnormally.
[0003] For floating ground (that is, single-phase two-wire (live wire L, neutral wire N, no ground wire)) electronic equipment, the EFT immunity test was carried out according to the national standard GB / T 17626.4-"Electrical Fast Transient Pulse Immunity Test", and it was found that This type of electronic equipment cannot pass the corresponding level standard test, and the electronic equipment has abnormalities, such as display disorder, crash, communication interruption, self-recovery, etc.

Method used

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  • Floating electronic equipment electric rapid transient pulse group protection method
  • Floating electronic equipment electric rapid transient pulse group protection method
  • Floating electronic equipment electric rapid transient pulse group protection method

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Embodiment Construction

[0020] Such as Figure 1-4 As shown, the present invention discloses a protection method for electrical fast transient bursts of floating electronic equipment, including:

[0021] The steps are:

[0022] The first step: if figure 1 As shown, place the equipment under test, that is, the floating electronic equipment, EFT generator, socket, wire and other connections on the test bench;

[0023] The second step: According to the first step, make relevant settings on the EFT generator, and conduct an EFT test on the device under test;

[0024] Step 3: Activate the "Start" button to conduct the EFT immunity test. If the device under test works normally (the probability is very small), the test ends; if the device under test works abnormally, follow the steps below for EFT protection. Its live wire interferes with the pulse group current flow path as figure 2 shown.

[0025] Since the frequency of the pulse group interference voltage generated by the EFT generator is 5KHz or ...

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Abstract

The invention provides a floating electronic equipment electric rapid transient pulse group protection method. One end, close to a grounding panel, of floating electronic equipment is provided with artificial ground. Firstly, a device to be tested, an EFT generator, a socket, and leads are successively connected on an experiment table; secondly, the EFT generator is set to test the device to be tested; thirdly, a 'start' button is started to carry out EFT noise immunity test, if the device to be tested works normally, the test is finished, and if the device to be tested works abnormally, the EFT protection is carried out; and fourthly, the bottom of the casing of the device to be tested is additionally provided with a piece of artificial ground tightly attached to the bottom of the casing of the device to be tested, and the EFT noise immunity test is carried out again. The protection method can effectively avoid EFT interference.

Description

technical field [0001] The invention relates to an electric fast transient pulse group protection method for floating electronic equipment based on the artificial ground principle, and belongs to the technical field of electromagnetic compatibility. Background technique [0002] Electrical Fast Transient (EFT) is caused by inductive loads (such as relays, contactors, etc.) Transient disturbances generated at When the inductive load is repeatedly switched on and off, the pulse train will be repeated multiple times with corresponding time gaps. This kind of transient disturbance energy is small, and generally does not cause damage to equipment, but because of its wide spectrum distribution, it will affect the reliable operation of electronic and electrical equipment. Because the pulse group continuously charges the semiconductor junction capacitance in the line, when the energy on the junction capacitance accumulates to a certain level, it will cause the malfunction of the e...

Claims

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Application Information

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IPC IPC(8): G01R31/00
Inventor 赵俊平王一凡徐侠王从杰单凯瑞
Owner 江苏益邦电力科技有限公司
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