S9407-AB-HBK-010 Datasheet, PDF (14/276 Pages) Glenair, Inc. – HANDBOOK OF SHIPBOARD ELECTROMAGNETIC SHIELDING PRACTICES

S9407-AB-HBK-010, Rev. 2
m. Appendix F contains guidance for shielding and spacing requirements on platforms
which contain dc generating coils. These requirements are in addition to the Section 6
shielding and spacing requirements.
1.3.2 Document Applicability
This document is applicable for all new Navy ship construction and in new SHIPALT
installations on Navy ships. The applicable revision or change of this document to be used for new
construction is the one in effect at the signing or issuing date of the specification or contract for ship
construction. For SHIPALT installations the document to be used is the document in effect at the date
of the authorization for the development of SHIPALT installation drawings. Backfitting existing
installations in accordance with the procedures of this document should only be accomplished where
the results of EMI testing and analysis indicate that cable spacing and shielding are the appropriate
solution for a specific EMI problem.
The applicability of this document to ships which used one of the predecessor documents,
either NAVSEA 0967-LP-283-5010 or S9407-AB-HBK-010, or a third document, the Electronics
Installation and Maintenance Book (EIMB), NAVSEA 0967-LP-000-0150, is discussed in the following
paragraphs.
a. Section 6 of this document shall be used for SHIPALT installations in those applications
where Section 6 of either NAVSEA 0967-LP-283-5010 or S9407-AB-HBK-010 was
previously employed. If any apparent conflicts arise between the documents, NUWC,
Newport will provide assistance in resolving the problem. The current application of
Section 6 criteria is as follows:
FF-1051/1078 Class SONAR systems (Backfit alterations)
DD963/DDG993 Class SONAR systems (Backfit alterations)
DDG 51 Class SONAR systems
CG 47 Class (CG49 and up) SONAR systems
SSBN 726 Class Command and Control area (Front half of ship)
SSN-21 Class and all succeeding New Submarine Contruction
b. The spacing and shielding criteria of Section 6 of NAVSEA 0967-LP-283-5010 is
identical to the Section 6 criteria of S9407-AB-HBK-010 (original issue). However, the
Section 6 criteria of Revision 1 was simplified with the elimination of two Radiator Cable
Designators from the spacing chart, figure 6-6. The changes in figure 6-6 are
discussed in paragraph c.
c. The spacing chart, figure 6-6, was modified in Revision 1 because the original spacing
values for the cable designators, R1-8 and R2-8 did not follow the general increasing
trend in magnetic field characteristics which occurs as the group numbers for R1 and
R2 increase from 1 through 9. Therefore, the original values for R1-8 and R2-8 were
deleted. This resulted in two empty lines labeled R1-8 and R2-8 which were then
eliminated from the chart. The MIL-C-915 cables which were originally designated R1-8
and R2-8 were shifted to the R1-2 and R2-2 designators respectively. Also, changes
were made in the original cable types selected as model cables for cable designators
R3-1 and R3-2. The model cable for R3-1 was changed from cable type DSS-2 to
cable type 2U; the model cable for R3-2 was shifted from cable type DSS-3 to DSS-2,
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