Method of producing a high-altitude electromagnetic pulse protected enclosure

• US 9,124,956 B2
• Filed: 09/14/2012
• Issued: 09/01/2015
• Est. Priority Date: 07/19/2007
• Status: Active Grant

• Current Assignee: CenturyLink Intellectual Property LLC (Lumen Technologies, Inc.)
• Original Assignee: Qwest Communications International Incorporated (Lumen Technologies, Inc.)
• Inventors: Heimann, Michael J., Zatz, Jennifer Edison, Sattler, Stephen, Bruno, Andrew
• Primary Examiner(s): ARBES, CARL J
• Application Number:
  US13/616,249
• Publication Number:
  US 20130000102A1
• Time in Patent Office: 1,082 Days
• US Class Current: 1/1
• CPC Class Codes: H04Q 1/025 Cabinets
• CPC Class Codes: H04Q 1/03 Power distribution arrangements
• CPC Class Codes: H04Q 1/066 arranged on the front side
• CPC Class Codes: H04Q 1/10 Exchange station construction
• CPC Class Codes: H04Q 1/112 mechanical protection, e.g. resistance to earthquakes
• CPC Class Codes: H04Q 1/116 lightning or EMI protection, e.g. shielding or grounding
• CPC Class Codes: H05K 7/1495 providing data protection in case of earthquakes, floods, storms, nuclear explosions, intrusions, fire
• CPC Class Codes: H05K 9/0062 Structures of standardised dimensions, e.g. 19" rack, chassis for servers or telecommunications
• CPC Class Codes: Y10T 29/49002 Electrical device making
• CPC Class Codes: Y10T 29/49764 with testing or indicating
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

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.

Claims

1. A method of producing a high-altitude electromagnetic pulse (“

HEMP”

) protected enclosure for holding an electronic device, comprising;

building a test HEMP protected enclosure of an enclosure design;

performing an acceptance testing procedure on the test HEMP protected enclosure;

determining whether the test HEMP protected enclosure meets a HEMP protection level 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 1.0e+0.7, and a root action of less than 1.6e−

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; and

producing a plurality of HEMP protected enclosures of the enclosure design if the test HEMP protected enclosure meets the HEMP protection level;

wherein the test HEMP protected enclosure comprises a cabinet having an interior space to house the electronic device, the cabinet having 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.

2. The method of claim 1, wherein the test HEMP protected enclosure comprises a cabinet width dimension of about 26 inches and a cabinet depth dimension of about 38 inches.

3. The method of claim 1, wherein the test HEMP protected enclosure comprises a cabinet width dimension of about 65 inches and a cabinet depth dimension of about 30 inches.

4. The method of claim 1, wherein the test HEMP protected enclosure comprises a cabinet width dimension of about 26 inches and a cabinet depth dimension of about 20¼

inches.

5. The method of claim 1, wherein the test HEMP protected enclosure comprises a maximum cabinet height dimension that does not exceed about 84 inches.

6. The method of claim 1, wherein the test HEMP protected enclosure comprises 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.

7. The method of claim 1, wherein the test HEMP protected enclosure provides a HEMP protection level to the telecommunications device of at least 100 dB attenuation at 1 GHz.

8. The method of claim 1, wherein the test HEMP protected enclosure further comprises:

a converter; and

a battery coupled with the converter.

9. The method of claim 1, wherein the test HEMP protected enclosure further comprises a power filter.

10. The method of claim 9, wherein a clean output of the power filter is disposed within the interior space of the cabinet.

11. The method of claim 9, wherein a dirty input of the power filter is disposed external to the cabinet.

12. The method of claim 1, wherein the cabinet comprises a front opening configured to receive the electronic device therethrough.

13. The method of claim 12, wherein the front opening of the cabinet comprises a width dimension of about 23 inches, and a height dimension of about 71 inches.

20. The method of claim 1, wherein the HEMP protected enclosure provides a HEMP protection level to the telecommunications device of at least 100 dB attenuation at 1 GHz.

14. A method of providing high altitude electromagnetic pulse (“

HEMP”

) protection to a telecommunications device, the method comprising;

providing a telecommunications device in a HEMP protected telecommunications enclosure, wherein the enclosure comprises a cabinet having an interior space, and a rack disposed within the interior space, the rack configured to support the telecommunications device, the cabinet comprising 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 providing 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 1.0e+0.7, and a root action of less than 1.6e−

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; and

placing the telecommunications device in the HEMP protected telecommunications enclosure.

15. The method of claim 14, wherein the HEMP protected enclosure comprises a cabinet width dimension of about 26 inches and a cabinet depth dimension of about 38 inches.

16. The method of claim 14, wherein the HEMP protected enclosure comprises a cabinet width dimension of about 65 inches and a cabinet depth dimension of about 30 inches.

17. The method of claim 14, wherein the HEMP protected enclosure comprises a cabinet width dimension of about 26 inches and a cabinet depth dimension of about 20¼

inches.

18. The method of claim 14, wherein the HEMP protected enclosure comprises a maximum cabinet height dimension that does not exceed about 84 inches.

19. The method of claim 14, wherein the HEMP protected enclosure comprises 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.

21. The method of claim 14, wherein the HEMP protected enclosure further comprises:

a converter; and

a battery coupled with the converter.

22. The method of claim 14, wherein the HEMP protected enclosure further comprises a power filter.

23. The method of claim 22, wherein a clean output of the power filter is disposed within the interior space of the cabinet.

24. The method of claim 22, wherein a dirty input of the power filter is disposed external to the cabinet.

25. The method of claim 14, wherein the cabinet comprises a front opening configured to receive the electronic device therethrough.

26. The method of claim 25, wherein the front opening of the cabinet comprises a width dimension of about 23 inches, and a height dimension of about 71 inches.