Energy sensor

• US 4,286,213 A
• Filed: 03/19/1979
• Issued: 08/25/1981
• Est. Priority Date: 03/19/1979
• Status: Expired due to Term

• Current Assignee: Research Products Corporation
• Original Assignee: Research Products Corporation
• Inventors: Fowler, Thomas P.
• Primary Examiner(s): Tokar, Michael J.
• Application Number:
  US06/021,721
• Time in Patent Office: 890 Days
• Field of Search: 324/127
• US Class Current: 324/127
• CPC Class Codes: G01R 15/186 using current transformers with a core consisting of two or more parts, e.g. clamp-on type G01R15/142 - G01R15/16 take precedence; tong testers G01R1/22

Abstract

A removable energy sensor for sensing the flow of electrical energy through a current carrying conductor. A magnetic flux conducting circuit includes a U-shaped bracket providing an opening for removably retaining a conductor while a removable pin is retained within openings at the outer portion of the bracket legs for securing a coil wound bobbin between such legs and for providing a coil surrounding such pin. The removable coil wound bobbin includes an insulator which cooperates with a similarly constructed insulator retained by the U-shaped bracket for sandwiching the electrical lead and maintaining such lead in spaced, isolated relationship with respect to the flux conducting circuit and the sensing coil.

Claims

1. A removable energy sensor for monitoring the flow of electrical energy through a current carrying conductor, said sensor comprising:

(a) a generally U-shaped flux conducting bracket for receiving a said conductor therethrough and having an inner end portion closed by a base portion which joins a pair of spaced outwardly directed legs terminating in an open outer end portion remote from said base portion,

(b) a removable assembly extending between said legs adjacent the said open outer end portion of said bracket, said assembly including;

(1) an insulator extending between said legs,

(2) and a coil of electrically conductive wire mounted on said insulator and with said wire having at least one output lead for providing an output signal substantially proportional to current flow through the said current carrying conductor,

(c) and a removable flux conducting retainer member mounting said assembly to said legs,

(d) said retainer member extending through said assembly and forming, together with said U-shaped bracket, a closed loop circuit for conducting flux about the said conductor in response to current flow through the said conductor.

2. The sensor of claim 1:

(a) wherein said legs include aligned openings therein,

(b) and said retainer member extends through said openings to hold said assembly in place.

3. The sensor of claim 1 or 2:

(a) wherein said insulator comprises a removable bobbin having a central core and a pair of end members on said core with said end members disposed between said legs,

(b) said coil being wrapped around said core.

4. The sensor of claim 3 wherein said retainer member extends through said central core and within said coil.

5. The sensor of claim 4 which includes means for suspending the said current carrying conductor between said inner end portion of said bracket and said assembly, said suspending means comprising:

(a) a first insulating member disposed within the inner end portion of said bracket and secured thereto,

(b) and a second insulating member forming part of said removable assembly,

(c) said first and second insulating members sandwiching the said current carrying conductor therebetween when said assembly is mounted to said bracket by said retainer member.

6. The sensor of claim 5 in which said removable assembly includes:

(a) a first insulating tape surrounding the outer periphery of said coil between said end members of said bobbin,

(b) a shielding foil member substantially surrounding said first insulating tape,

(c) and a second insulating tape substantially surrounding said metal foil,

(d) said second insulating member being attached to said second insulating tape.