Protective telecommunications enclosure systems and methods
Protective containers for electronic equipment, and methods of testing and manufacture thereof, are provided. The cabinets provide a HEMP protection level to electronic equipment housed therein that meets a HEMP protection level according to MIL-STD-188-125-1.
1. 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 20¼ 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 e−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 (“FWHM”) of between 500 and 550 ns.
2. A HEMP protected telecommunications enclosure as in claim 1 , wherein the cabinet comprises a maximum height dimension that does not exceed about 84 inches.
3. A HEMP protected telecommunications enclosure as in claim 1 , wherein the enclosure provides a HEMP protection level to the telecommunications device of at least 100 dB attenuation at 1 GHz.
4. A HEMP protected telecommunications enclosure as in claim 1 , further comprising:
a power input point of entry that facilitates entry of a power cable to the interior space from a location external to the cabinet; and
a fiber optic cable point of entry that facilitates entry of a fiber optic cable to the interior space from a location external to the cabinet.
5. A HEMP protected telecommunications enclosure as in claim 1 , further comprising:
a converter; and
a battery coupled with the converter.
6. A HEMP protected telecommunications enclosure as in claim 1 , further comprising a power filter.
7. A HEMP protected telecommunications enclosure as in claim 6 , wherein a clean output of the power filter is disposed within the interior space of the cabinet.
8. A HEMP protected telecommunications enclosure as in claim 6 , wherein a dirty input of the power filter is disposed external to the cabinet.
9. A HEMP protected telecommunications enclosure as in claim 6 , wherein the cabinet comprises a front opening configured to receive the electronic device therethrough.
10. A HEMP protected telecommunications enclosure as in claim 9 , wherein the front opening of the cabinet comprises a width dimension of about 23 inches, and a height dimension of about 71 inches.
11. A HEMP protected telecommunications enclosure as in claim 1 , further comprising:
a power input point of entry that facilitates entry of a power cable to the interior space from a location external to the cabinet, the power input point of entry disposed at a top surface of the enclosure; and
a fiber optic cable point of entry that facilitates entry of a fiber optic cable to the interior space from a location external to the cabinet, the fiber optic cable point of entry disposed at a top surface of the enclosure.
12. A HEMP protected telecommunications enclosure as in claim 11 , comprising a power cable coupled with the power input point of entry, and a fiber optic cable coupled with the fiber optic cable point of entry.