Shielding effectiveness of the liquid tight flexible conduit from transient tests
Technical Report
·
OSTI ID:4347479
Analysis and tests on a spiral-wrapped, mild steel, flexible conduit tube are reported. Experimentally, the transfer impedance was determined by attempting to produce a uniformly distributed current in the shield and measuring the corresponding electric field on the inside. A capacitor discharging into the coaxial line formed by the conduit and an external concentric cylinder provided the drive current, while the voltage developed along the entire length of the cable was measured. A diagram of the laboratory apparatus and representative waveform is provided. Analysis is provided to predict solenoidal rather than solid tube behavior. Shielding behavior was poor at higher frequencies, with the possibility of turnto-turn arcing occurring under high current conditions. (auth)
- Research Organization:
- California Univ., Livermore (USA). Lawrence Livermore Lab.
- NSA Number:
- NSA-29-015534
- OSTI ID:
- 4347479
- Report Number(s):
- PEM--3
- Country of Publication:
- United States
- Language:
- English
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