Surge protection device for complex transients
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United States of America
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Apr 2, 2024
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N/A
app pub date -
Dec 17, 2021
filing date -
Dec 17, 2021
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Abstract
A multi-stage surge protection device protects against complex, time-variant voltage transients, including those resulting from a high-altitude nuclear electromagnetic pulse or a solar coronal mass ejection. The transient voltage suppressor limits the let-through voltage to a clamping level and provides indication to the crowbar circuit when it is no longer able to do so. Once the clamping level is no longer able to be maintained, the crowbar circuit draws enough current to trip an upstream protective device, such as a breaker or fuse. A low-pass filter can be added to significantly lower the let-through voltage of the device for short-duration pulses, and help to spread the energy to more effectively utilize the transient voltage suppressor.
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