I've got a POE Powered Device (PD) that I would like to make sure the surge protection is functioning in the event of a surge that it doesn't take down my device. How could I test for surge\transient over POE?
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I was going to ask this question, but then found the answer and decided to write it up for others. – Voltage Spike May 09 '23 at 19:28
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Which surges do you need to meet? – Tim Williams May 09 '23 at 20:12
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I don't have any hard reqs but I don't want the product to fail out in the field, so thought I'd look for something to test it with – Voltage Spike May 09 '23 at 21:34
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TI offers a circuit to test transients over POE.
Source: slua736
Voltage Spike
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I googled for fun: "A typical lightning flash is about 300 million Volts and about 30,000 Amps." That's gonna be one hefty 20uF capacitor – vicatcu May 09 '23 at 19:19
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1It might be better to use the indirect lightning spec EN 61000-4-5. It describes the waveforms, the peak voltage for each class and the series current-limiting impedance of the waveform. Then, you just simulate and see how much power is dissipated in the TVSs. You don't need to buy the spec; there are several on-line documents that give you enough details to make a generator or simulate it. – Andy aka May 10 '23 at 10:06