Materials characterization cell for polarization spectrum and streaming electrification measurements

• US 5,747,992 A
• Filed: 06/07/1995
• Issued: 05/05/1998
• Est. Priority Date: 06/07/1995
• Status: Expired due to Fees

• Current Assignee: ABB Incorporated (ABB Limited)
• Original Assignee: ABB Power T&D Limited (ABB Limited)
• Inventors: Frimpong, George K., Brubaker, Michael A.
• Primary Examiner(s): BROWN, GLENN WARNER
• Application Number:
  US08/484,571
• Time in Patent Office: 1,063 Days
• Field of Search: 324/453, 324/663, 324/671, 324/686, 324/690, 361/280, 361/281, 361/285
• US Class Current: 324/663
• CPC Class Codes: G01N 27/221 by investigating the dielectric properties using microwaves G01N22/00; measuring loss factors or dielectric constants per se G01R27/26
• CPC Class Codes: G01N 27/226 Construction of measuring vessels; Electrodes therefor
• CPC Class Codes: G01N 27/60 by investigating electrostatic variables , e.g. electrographic flaw testing G01N27/007 takes precedence
• CPC Class Codes: G01N 27/605 for determining moisture content, e.g. humidity

Abstract

A materials characterization test cell is disclosed. The test cell includes a housing including spacers for supporting sample insulation materials, and a channel disposed in the housing to permit the passage of oil through the housing. A pair of electrodes is provided to provide a mechanism for making polarization spectrum and/or streaming electrification measurements.

Claims

1. A materials characterization cell, comprising:

(a) a housing;

(b) a rectangular channel disposed in said housing, said channel permitting the static or dynamic passage of oil through said housing;

(c) a first sample of insulation material disposed in said housing adjacent to said channel;

(d) a first planar electrode plate disposed in said housing adjacent to said first sample;

(e) a second sample of said insulation material said second sample being disposed in said housing adjacent to said channel and opposite said first sample; and

(f) a second planar electrode plate disposed in said housing adjacent to said second sample;

said first and second electrode plates being disposed in said housing in spaced parallel relationship with respect to said rectangular channel, whereby a capacitor having a prescribed geometry is formed by said electrodes samples and channel.