Low Inductance Methods for Grounding Cable Shields to Ship Structures for EMP Protection.
Abstract
EMP coupling measurements at EMPRESS on DD and DLG classes of ships have shown that an efficient low-inductance method of grounding cable shields is needed. High frequency currents up to 150 amperes can be expected on cable shields in interior ship compartments where sensitive and sophisticated electronic systems are located. A testing program encouraged by NAVSEC has demonstrated that attenuation of cable shield currents by 60 dB and better over a frequency range from 0.5 MHz to 100 MHz can be achieved by grounding cable shields to stuffing tubes through 360 degree low-inductance grounding devices. Grounding collars external to the stuffing tubes were as efficient as RF gaskets located internally; were easier to install and inspect; and are less exposed to the sea environment. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 02, 1979
- Accession Number
- ADA068824
Entities
People
- B. Zendle
- M. C. Petree
Organizations
- Naval Ordnance Laboratory