Mechanical wear, wipe and stroke measurement system for circuit breakers

Patent metadata

Field	Value
Publication number	US-9704657-B2
Application number	US-201615096339-A
Country	US
Kind code	B2
Filing date	Apr 12, 2016
Priority date	Nov 13, 2014
Publication date	Jul 11, 2017
Grant date	Jul 11, 2017

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. An indicator assembly for a circuit breaker assembly, said circuit breaker assembly including a stationary, 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 indicator assembly comprising:
an indicator drive assembly including a first drive member;
a user display assembly structured to communicate information related to a contact characteristic;
said indicator drive assembly first drive member operatively coupled to said operating mechanism whereby said indicator drive assembly first drive member moves between a first position and a second position corresponding to said CBA second contact assembly first and second positions;
said indicator drive assembly first drive member measurably coupled to said user display assembly; and
wherein said user display assembly communicates information related to a contact characteristic.

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

3. The 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 CBA second contact 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 indicator drive assembly first displacement device is operatively coupled to said CBA second contact assembly.

4. The 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 pole stem axis of motion.

5. The indicator assembly of claim 3 further comprising:
a contact interface assembly, said contact interface assembly coupled to said operating mechanism whereby said contact interface assembly moves with said CBA second contact assembly pole stem between a first position and a second position; and
said contact interface assembly operatively coupled to, and disposed between, said CBA second contact assembly pole stem and said indicator drive assembly first drive member.

6. The 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 pole stem axis of motion; and
wherein said contact interface assembly roller moves over said indicator drive assembly first wedge engagement surface.

7. The indicator assembly of claim 1 wherein said user display assembly is structured to communicate information related to CBA contact assembly wear.

8. The indicator assembly of claim 1 wherein:
wherein said indicator drive assembly first displacement device is an indicator drive assembly first wedge including an engagement surface;
wherein said second displacement device is an indicator drive assembly second wedge including an engagement surface;
said angle of said indicator drive assembly first wedge engagement surface relative to said CBA second contact assembly pole 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 indicator assembly of claim 1 further comprising:
a contact interface assembly, said contact interface assembly coupled to said operating mechanism whereby said contact interface assembly moves with said CBA second contact assembly pole stem between a first position and a second position;
one of said contact interface assembly or said indicator drive assembly includes a sensor assembly;

said sensor assembly structured to detect and measure 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 indicator assembly of claim 1 wherein said indicator drive assembly is structured to generate position data is representative of CBA contact assembly wear.

11. A circuit breaker comprising:
a fixed, CBA first contact assembly;
a stationary, 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;
an 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 operating mechanism operatively coupled to said CBA second contact assembly and structured to move said CBA second contact assembly between said first and second positions, 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;
an indicator assembly including an indicator drive assembly, and a user display assembly;
said indicator drive assembly including a first drive member;
said user display assembly structured to communicate information related to a contact characteristic;
said indicator drive assembly first drive member operatively coupled to said operating mechanism whereby said indicator drive ass

Assignees

• Eaton Corp

Inventors

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

Classifications

• G01R31/327

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

• G01R31/333

  Testing of the switching capacity of high-voltage circuit-breakers {; Testing of breaking capacity or related variables, e.g. post arc current or transient recovery voltage} · CPC title

• H01H33/66

  Vacuum switches · CPC title

• H01H1/0015 Primary

  Means for testing or for inspecting contacts, e.g. wear indicator (measuring circuits G01R31/3274) · CPC title

• H01H9/16

  Indicators for switching condition, e.g. "on" or "off" · CPC title