Mechanical wear, wipe and stroke measurement system for circuit breakers

Patent metadata

Field	Value
Publication number	US-9378901-B2
Application number	US-201414540113-A
Country	US
Kind code	B2
Filing date	Nov 13, 2014
Priority date	Nov 13, 2014
Publication date	Jun 28, 2016
Grant date	Jun 28, 2016

Abstract

A contact wear indicator assembly for a circuit breaker assembly is provided. The contact wear indicator assembly includes an interface assembly, an indicator drive assembly, and a user display assembly. The user display assembly includes an output device. The output device is structured to produce a visual indication representative of a measurable contact characteristic. The indicator drive assembly is operatively coupled to the interface assembly, whereby the indicator drive assembly moves between a first position and a second position corresponding to an interface assembly first and second position. The indicator drive assembly is measurably coupled to the user display assembly. The user display assembly is structured to convert the position data of the indicator drive assembly into a quantified output such as, but not limited to, contact characteristics. The user display assembly is further structured to display the indicator drive assembly position data on the output device.

First claim

What is claimed is:

1. A contact wear indicator assembly for a circuit breaker assembly, said circuit breaker assembly including a fixed, CBA first contact assembly, a movable, CBA second contact assembly, and an operating mechanism, said operating mechanism operatively coupled to said CBA second contact assembly, said CBA second contact assembly including an elongated stem and a contact member, said CBA second contact assembly moveable between a first position, wherein said CBA second contact assembly contact member is spaced from, and not in electrical communication with, said CBA first contact assembly, and a second position, wherein said CBA second contact assembly contact member is coupled to, and in electrical communication with, said CBA first contact assembly, wherein said CBA second contact assembly stem moves generally linearly between a first and second position corresponding to said CBA second contact assembly contact member first and second positions, said operating mechanism including a number of movable elements, a portion of said movable elements are coupled to said CBA second contact assembly, said portion of said operating mechanism elements coupled to said CBA second contact assembly move between a first position and a second position corresponding to said CBA second contact assembly first and second positions, said contact wear indicator assembly comprising:
a contact interface assembly, said contact interface assembly coupled to said CBA second contact assembly stem whereby said contact interface assembly moves with said CBA second contact assembly stem between a first position and a second position;
an indicator drive assembly including an elongated, first drive member,
a user display assembly including an output device, said output device structured to produce a visual indication representative of a contact characteristic;
said indicator drive assembly first drive member operatively coupled to said contact interface assembly whereby said indicator drive assembly first drive member moves between a first position and a second position corresponding to said contact interface assembly first and second positions;
said indicator drive assembly first drive member measurably coupled to said user display assembly; and
said user display assembly structured to display indicator drive assembly first drive member position data on said output device.

2. The contact wear indicator assembly of claim 1 wherein said indicator drive assembly first drive member translates between said first and second positions.

3. The contact wear indicator assembly of claim 1 wherein:
said indicator drive assembly first drive member includes an elongated body with a first end and a second end;
said indicator drive assembly first drive member body first end disposed adjacent said contact interface assembly;
said indicator drive assembly includes a first displacement device;
said indicator drive assembly first displacement device coupled to said indicator drive assembly first drive member body first end; and
said contact interface assembly operatively coupled to said indicator drive assembly first displacement device.

4. The contact wear indicator assembly of claim 3 wherein:
wherein said indicator drive assembly first displacement device is an indicator drive assembly first wedge including an engagement surface; and
said indicator drive assembly indicator drive assembly first wedge engagement surface is disposed at an angle relative to said CBA second contact assembly stem axis of motion.

5. The contact wear indicator assembly of claim 3 wherein:
said indicator drive assembly first drive member body second end disposed adjacent said user display assembly;
said user display assembly includes a first link member assembly and a gauge indicia;
said user display assembly first link member assembly includes a body with a first end and a second end;
said user display assembly first link member assembly body second end disposed in an indication relationship with said user display assembly gauge indicia;
said indicator drive assembly includes a second displacement device;
said second displacement device coupled to said indicator drive assembly first drive member body second end;
said second displacement device operatively coupled to said user display assembly first link member assembly body first end;
said user display assembly first link member assembly structured to move between a first position, corresponding to said CBA second contact assembly first position, and a second position, corresponding to said CBA second contact assembly second position; and
wherein movement of said indicator drive assembly first drive member between its said first and second position causes a movement of said user display assembly first link member assembly between its said first and second position.

6. The contact wear indicator assembly of claim 5 wherein:
said contact interface assembly includes a roller;
wherein said first displacement device is an indicator drive assembly first wedge including an engagement surface;
said indicator drive assembly indicator drive assembly first wedge engagement surface is disposed at an angle relative to said CBA second contact assembly stem axis of motion; and
wherein said contact interface assembly roller moves over said indicator drive assembly indicator drive assembly first wedge engagement surface.

7. The contact wear indicator assembly of claim 6 wherein:
wherein said second displacement device is an indicator drive assembly second wedge including an engagement surface;
said indicator drive assembly first drive member body translates along an axis of motion between its said first and second position;
said indicator drive assembly indicator drive assembly second wedge engagement surface is disposed at an angle relative to said indicator drive assembly first drive member body axis of motion;
said user display assembly includes a roller; and
wherein said user display assembly roller moves over said indicator drive assembly second wedge engagement surface.

8. The contact wear indicator assembly of claim 7 wherein:
said angle of said indicator drive assembly first wedge engagement surface relative to said CBA second contact assembly stem axis of motion is one of a corresponding angle, a magnification angle, or a reduction angle; and
said angle of indicator drive assembly second wedge engagement surface relative to the user display assembly first link member assembly axis of motion is one of a corresponding angle, a magnification angle, or a reduction angle.

9. The contact wear indicator assembly of claim 1 wherein:
said indicator drive assembly first drive member is an operating mechanism pole shaft;
said operating mechanism pole shaft structured to rotate between a first position, corresponding to said CBA second contact assembly first position, and a second position, corresponding to said CBA second contact assembly second position;
one of said contact interface assembly or said indicator drive assembly includes a sensor assembly;
said sensor assembly structured to detect, measure and produce a signal representative of, a measurable characteristic of one of said CBA second contact assembly or said operating mechanism pole shaft and to produce a signal corresponding to said measurable characteristic; and
said user display assembly structured to receive said sensor assembly signal and to display data representative of said sensor assembly signal.

10. The contact wear indicator assembly of claim 9 wherein:
said pole shaft includes a number of crank members, said crank members extending generally radially from said pole shaft; and
said contact interface assemb

Assignees

• Eaton Corp

Inventors

• Ashtekar Koustubh Dnyandeo
• Benke James Jeffery
• Jenkins Zachary R

Classifications

• G01R31/3274

  Details related to measuring, e.g. sensing, displaying or computing; Measuring of variables related to the contact pieces, e.g. wear, position or resistance (measuring contact resistance G01R27/205) · CPC title

• G01R31/327

  Testing of circuit interrupters, switches or circuit-breakers · CPC title

• G01R31/3333

  Apparatus, systems or circuits therefor · CPC title

• H01H2001/0026

  wherein one or both contacts contain embedded contact wear signal material, e.g. radioactive material being released as soon as the contact wear reaches the embedded layer · CPC title

• H03K17/18

  Modifications for indicating state of switch · CPC title