Abstract
High-altitude Electromagnetic Pulse (HEMP) has a significant impact on power systems. This paper simulates the HEMP coupling for three types of power cables in an electromagnetic shielding cabinet. Besides, this paper proposes the HEMP protection circuit design for 220 V AC and 24 V DC power. In a lightning conduction injection test, the circuit reduces the peak voltage by 12.1 and 14.2 times for AC and DC, respectively. In a pulsed current injection (PCI) test, the circuit reduces the transient peak current to less than 8.2 A for both AC and DC.
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