Patent ID: 8289717

Claim:
A HEMP protected enclosure for holding an electronic device, comprising: a cabinet having an interior space; and a rack disposed within the interior space, the rack configured to support the electronic device; wherein the test HEMP protected enclosure comprises a cabinet width dimension of about 26 inches and a cabinet depth dimension of about 38 inches, a cabinet width dimension of about 65 inches and a cabinet depth dimension of about 30 inches, or a cabinet width dimension of about 26 inches and a cabinet depth dimension of about 20Â¼ inches, and the enclosure provides a HEMP protection level to the telecommunications device that includes a shielding effectiveness of at least 80 dB attenuation at 1 GHz, with a residual peak current of less than 10 A, a rate of rise less than 1.0 e+0.7, and a root action of less than 1.6 eâˆ’01 in response to a signal incident on the HEMP protected enclosure, the signal simulated by an input waveform into a short circuit having a risetime of less than 20 ns and a full width half maximum (â€œFWHMâ€) of between 500 and 550 ns.