Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Patent
1990-08-23
1992-06-30
Harvey, Jack B.
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
324715, G01R 2714
Patent
active
051266806
ABSTRACT:
A probe for use in non-destructive measuring of electrical resistance of a high current electrical connection between two high current electrical conductors, each of the conductors having a longitudinal exterior surface, the probe comprising: an articulated body being articulated about a longitudinal axis; a plurality of electrodes provided on an interior portion of the articulated body for engaging about the longitudinal exterior surface; connecting means for releaseably connecting the articulating body around the longitudinal exterior surface, the connecting means including resilient means cooperating with the plurality of electrodes for causing the electrodes to resiliently engage the surface, the electrodes being located on the probe body to be arranged substantially evenly around and on the longitudinal exterior surface of the corresponding conductor in a plane substantially perpendicular to a current flow in the conductor; and resistors connected in series with each electrode, each of the resistors having substantially an equal resistance substantially greater than a contact resistance between the corresponding electrode and the corresponding conductor, the resistors being connected to at least one common terminal for connection to a high sensitivity low resistance ohm-meter. The probe makes the measuring easier and more accurate by assuring a good current distribution in the conductors.
REFERENCES:
patent: 2208023 (1940-07-01), Ellis
patent: 4179652 (1979-12-01), Davis
"Multiple Electrode Probe Assemblies and Nondestructive Testing of High Ampacity Joints," Francois Morin et al., Aug. 1990.
Technologie Affaires Internationales Institut de Recherche D'Hydro-Quebec, report of Activities, Dec. 1989.
Morin Francois
Parker Michael
Harvey Jack B.
Hydro-Quebec
Regan Maura K.
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