Sensor for circuit breaker open and close failure prediction

• US 10,424,444 B2
• Filed: 03/20/2017
• Issued: 09/24/2019
• Est. Priority Date: 12/10/2015
• Status: Active Grant

• Current Assignee: Eaton Intelligent Power Limited (Eaton Corporation PLC.)
• Original Assignee: Eaton Intelligent Power Limited (Eaton Corporation PLC.)
• Inventors: Yang, He, Xin, Chao, Chen, Jiong, Mao, Mark, Yu, Li
• Primary Examiner(s): LaBalle, Clayton E.
• Assistant Examiner(s): Sanghera, Jas A
• Application Number:
  US15/462,941
• Publication Number:
  US 20170194113A1
• Time in Patent Office: 918 Days
• Field of Search: None
• CPC Class Codes: G01R 31/3272 Apparatus, systems or circuits therefor G01R31/3275 takes precedence
• CPC Class Codes: G01R 31/3275 Fault detection or status indication
• CPC Class Codes: G01R 31/3277 of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
• CPC Class Codes: H01H 2033/6667 Details concerning lever type driving rod arrangements
• CPC Class Codes: H01H 2071/044 Monitoring, detection or measuring systems to establish the end of life of the switching device, can also contain other on-line monitoring systems, e.g. for detecting mechanical failures
• CPC Class Codes: H01H 2300/052 Controlling, signalling or testing correct functioning of a switch see also H01H2300/056 - H01H2300/066 and H01H11/0062
• CPC Class Codes: H01H 3/3005 Charging means
• CPC Class Codes: H01H 33/666 Operating arrangements
• CPC Class Codes: H01H 9/54 Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere

Abstract

A failure prediction assembly is structured to monitor circuit breaker assembly sub-assemblies and their component'"'"'s characteristics. The failure prediction assembly includes a sensor supported D-shaft and a sensor assembly including a housing and a number of sensors. The sensor assembly housing defines a D-shaft passage. A control unit is in electronic communication with the sensor assembly. The sensor assembly housing is coupled to the circuit breaker sidewalls with the sensor assembly housing D-shaft passage aligned with the circuit breaker sidewall D-shaft passages. The sensor supported D-shaft is rotatably coupled to the sensor assembly with the sensor supported D-shaft disposed through said sensor assembly housing D-shaft passage.

Claims

1. A failure prediction assembly for a circuit breaker, said circuit breaker including an operating mechanism with a number of springs, a number of link members, and a number of circuit breaker sidewalls, said operating mechanism structured to move between an open, first configuration and a closed, second configuration, wherein, said number of springs include opening springs and closing springs, said number of link members includes a trip latch member, said circuit breaker sidewalls defining a pair of aligned D-shaft passages, wherein, when said operating mechanism is in said closed configuration, said opening springs apply a D-shaft force via said trip latch, said failure prediction assembly comprising:

a sensor supported D-shaft;

a sensor assembly including a housing and a number of sensors;

said sensor assembly housing defining a D-shaft passage;

a control unit, said control unit in electronic communication with said sensor assembly;

said sensor assembly housing coupled to said circuit breaker sidewalls with said sensor assembly housing D-shaft passage aligned with said circuit breaker sidewall D-shaft passages; and

said sensor supported D-shaft rotatably coupled to said sensor assembly with said sensor supported D-shaft disposed through said sensor assembly housing D-shaft passage.

2. The failure prediction assembly of claim 1 wherein:

said sensor supported D-shaft includes a number of sidewall portions;

said sensor supported D-shaft number of sidewall portions including a sensor assembly sidewall portion; and

wherein said sensor supported D-shaft sidewall sensor assembly sidewall portion has a smaller cross-sectional area than the associated circuit breaker sidewall D-shaft passage.

3. The failure prediction assembly of claim 1 wherein:

said control unit includes a record assembly, a comparison assembly, an FTB assembly and an output assembly;

said control unit structured to receive a sensor signal from each sensor in said number of sensors and to provide actual component characteristic output data to said FTB assembly;

said control unit structured to send an alert signal to said output assembly;

said FTB assembly structured to perform a number of functions to said actual component characteristic output data to generate calculated component characteristics;

a comparison assembly structured to receive an electronic signal from said record assembly and said FTB assembly to compare said calculated component characteristics to selected nominal data and to provide an indication signal as to whether said calculated component characteristics is acceptable when compared to the selected nominal data; and

wherein, if any calculated component characteristics is unacceptable, said control unit sends an alert signal to said output assembly.

4. The failure prediction assembly of claim 3 wherein each said sensor in said sensor assembly number of sensors is operatively coupled to the same link member.

5. The failure prediction assembly of claim 3 wherein each said sensor in said sensor assembly number of sensors is operatively coupled to said sensor supported D-shaft.

6. The failure prediction assembly of claim 5 wherein said sensor assembly is structured to determine a single actual component characteristic of said sensor supported D-shaft.

7. The failure prediction assembly of claim 6 wherein:

said FTB assembly includes an FTB module;

said FTB module structured to perform a number of functions to said actual component characteristic output data to generate calculated component characteristics; and

wherein said FTB module calculates linkage characteristics for link members other than said sensor supported D-shaft.

8. The failure prediction assembly of claim 6 wherein said single actual component characteristic of said sensor supported D-shaft determined by said sensor assembly is a reactive trip latch force.

9. The failure prediction assembly of claim 6 wherein said FTB module includes the Eaton Equations.

10. The failure prediction assembly of claim 6 wherein said sensor assembly is mounted in one of a vertical orientation or a non-vertical orientation.

11. A circuit breaker comprising:

an operating mechanism with a number of springs, a number of link members, and a number of circuit breaker sidewalls;

said operating mechanism structured to move between an open, first configuration and a closed, second configuration;

said number of springs include opening springs and closing springs;

said number of link members includes a trip latch member;

said circuit breaker sidewalls defining a pair of aligned D-shaft passages;

wherein, when said operating mechanism is in said closed configuration, said opening springs apply a D-shaft force via said close latch member;

a failure prediction assembly including a sensor supported D-shaft, a sensor assembly;

said sensor assembly including a housing and a number of sensors;

said sensor assembly housing defining a D-shaft passage;

a control unit, said control unit in electronic communication with said sensor assembly;

said sensor assembly housing coupled to said circuit breaker sidewalls with said sensor assembly housing D-shaft passage aligned with said circuit breaker sidewall D-shaft passages; and

said sensor supported D-shaft rotatably coupled to said sensor assembly with said sensor supported D-shaft disposed through said sensor assembly housing D-shaft passage.

12. The circuit breaker of claim 11 wherein:

said sensor supported D-shaft includes a number of sidewall portions;

said sensor supported D-shaft number of sidewall portions including a sensor assembly sidewall portion; and

wherein said sensor supported D-shaft sidewall sensor assembly sidewall portion has a smaller cross-sectional area than the associated circuit breaker sidewall D-shaft passage.

13. The circuit breaker of claim 11 wherein:

said control unit includes a record assembly, a comparison assembly, an FTB assembly and an output assembly;

said control unit structured to receive a sensor signal from each sensor in said number of sensors and to provide actual component characteristic output data to said FTB assembly;

said control unit structured to send an alert signal to said output assembly;

said FTB assembly structured to perform a number of functions to said actual component characteristic output data to generate calculated component characteristics;

a comparison assembly structured to receive an electronic signal from said record assembly and said FTB assembly to compare said calculated component characteristics to selected nominal data and to provide an indication signal as to whether said calculated component characteristics is acceptable when compared to the selected nominal data; and

wherein, if any calculated component characteristics is unacceptable, said control unit sends an alert signal to said output assembly.

14. The circuit breaker of claim 13 wherein each said sensor in said sensor assembly number of sensors is operatively coupled to the same link member.

15. The circuit breaker of claim 13 wherein each said sensor in said sensor assembly number of sensors is operatively coupled to said sensor supported D-shaft.

16. The circuit breaker of claim 15 wherein said sensor assembly is structured to determine a single actual component characteristic of said sensor supported D-shaft.

17. The circuit breaker of claim 16 wherein:

said FTB assembly include an FTB module;

said FTB module structured to perform a number of functions to said actual component characteristic output data to generate calculated component characteristics; and

wherein said FTB module calculates linkage characteristics for link members other than said sensor supported D-shaft.

18. The circuit breaker of claim 16 wherein said single actual component characteristic of said sensor supported D-shaft determined by said sensor assembly is a reactive trip latch force.

19. The circuit breaker of claim 16 wherein said FTB module includes the Eaton Equations.

20. The circuit breaker of claim 16 wherein said sensor assembly is mounted in one of a vertical orientation or a non-vertical orientation.