Methods and apparatus for characterizing a circuit breaker device

• US 6,618,649 B1
• Filed: 09/26/2000
• Issued: 09/09/2003
• Est. Priority Date: 09/26/2000
• Status: Expired due to Term

• Current Assignee: Emc IP Holding Company LLC (Dell Technologies Inc.)
• Original Assignee: EMC Corporation (Dell Technologies Inc.)
• Inventors: Shilo, Marcel
• Primary Examiner(s): Picard, Leo
• Assistant Examiner(s): FRANK, ELLIOT L
• Application Number:
  US09/670,429
• Time in Patent Office: 1,078 Days
• Field of Search: 700/21, 700/22, 700/79, 700/81, 700/177, 700/292, 700/293, 702/115, 324/424
• US Class Current: 700/292
• CPC Class Codes: G01R 31/3277 of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches

Abstract

Techniques characterize a circuit breaker device utilizing an apparatus having an energy storage device for storing and releasing a particular amount of energy and a controller. The controller (i) disconnects the energy storage device from an interface and connects the energy storage device to an external power source to store the particular amount of energy in the energy storage device, and (ii) disconnects the energy storage device from the external power source and connects the energy storage device to the interface such that energy is released from the energy storage device through the interface and through the circuit breaker device. The circuit breaker device is deemed to belong to a first category when the circuit breaker device trips in response to the released energy, and a second category when the circuit breaker device does not trip in response to the released energy.

Claims

1. An apparatus for characterizing a circuit breaker device, comprising:

an interface that is capable of connecting to the circuit breaker device;

an energy storage device that is capable of storing and releasing a particular amount of energy; and

a controller, coupled to the energy storage device and the interface, that (i) disconnects the energy storage device from the interface and connects the energy storage device to an external power source to store the particular amount of energy in the energy storage device, and (ii) disconnects the energy storage device from the external power source and connects the energy storage device to the interface to release, when the circuit breaker device is connected to the interface, energy from the energy storage device through the interface and through the circuit breaker device regardless of whether the circuit breaker device trips, the circuit breaker device being deemed as belonging to a first category when the circuit breaker device trips in response to the released energy, and the circuit breaker device being deemed as belonging to a second category when the circuit breaker device does not trip in response to the released energy.

2. The apparatus of claim 1 wherein the energy storage device is configured to provide direct current through the circuit breaker device when the controller connects the energy storage device to the interface.

3. The apparatus of claim 1 wherein the energy storage device includes a capacitor bank for storing energy from the external power supply and releasing energy through the circuit breaker device.

4. The apparatus of claim 3 wherein the energy storage device further includes a calibration device for adjusting capacitance of the capacitor bank.

5. The apparatus of claim 3 wherein the energy storage device further includes a calibration device for adjusting voltage of the capacitor bank.

6. The apparatus of claim 1 wherein the controller includes a manually operated switch that (i) disconnects the energy storage device from the interface and connects the energy storage device to the external power source when the switch is manually placed in a first position, (ii) disconnects the energy storage device from the external power source and connects the energy storage device to the interface when the switch is manually placed in a second position, and (iii) disconnects the energy storage device from both the interface and the external power source when the switch is manually placed in a third position.

7. The apparatus of claim 1 wherein the controller includes a switch that (i) disconnects the energy storage device from the interface and connects the energy storage device to the external power source in response to a first signal, (ii) disconnects the energy storage device from the external power source and connects the energy storage device to the interface in response to a second signal, and (iii) disconnects the energy storage device from both the interface and the external power source in response to a third signal.

27. The apparatus of claim 1 wherein the energy storage device has an energy storage capacity that exceeds a predetermined trip threshold by a predetermined tolerance in order to discharge, as the energy released through the interface and through the circuit breaker device, an amount of energy in excess of the predetermined trip threshold to trip the circuit breaker device when the circuit breaker device has a trip threshold that is less than or equal to the predetermined trip threshold, and to not trip the circuit breaker device when the circuit breaker has a trip threshold that is greater than the predetermined trip threshold.

28. The apparatus of claim 27 wherein the interface is configured to electrically connect to electrical protection contacts of the circuit breaker device to pass current through the electrical protection contacts of the circuit breaker device regardless of whether the circuit breaker device trips.

8. A computer system, comprising:

a computerized device for performing computerized operations;

a circuit breaker device, coupled to the computerized device, that protects the computerized device against an extreme electrical stress; and

a characterization apparatus that characterizes the circuit breaker device, the characterization apparatus having;

an interface that connects to the circuit breaker device,

an energy storage device that is capable of storing and releasing a particular amount of energy, and

a controller, coupled to the energy storage device and the interface, that (i) disconnects the energy storage device from the interface and connects the energy storage device to an external power source to store the particular amount of energy in the energy storage device, and (ii) disconnects the energy storage device from the external power source and connects the energy storage device to the interface such that energy is released from the energy storage device through the interface and through the circuit breaker device, the circuit breaker device being deemed as belonging to a first category when the circuit breaker device trips in response to the released energy, and the circuit breaker device being deemed as belonging to a second category when the circuit breaker device does not trip in response to the released energy.

9. The computer system of claim 8 wherein the energy storage device of the characterization apparatus is configured to provide direct current through the circuit breaker device when the controller of the characterization apparatus connects the energy storage device to the interface of the characterization apparatus.

10. The computer system of claim 8 wherein the energy storage device of the characterization apparatus includes a capacitor bank for storing energy from the external power supply and releasing energy through the circuit breaker device.

11. The computer system of claim 10 wherein the energy storage device of the characterization apparatus further includes a calibration device for adjusting capacitance of the capacitor bank.

12. The computer system of claim 10 wherein the energy storage device of the characterization apparatus further includes a calibration device for adjusting voltage of the capacitor bank.

13. The computer system of claim 8 wherein the controller of the characterization apparatus includes a manually operated switch that (i) disconnects the energy storage device from the interface and connects the energy storage device to the external power source when the switch is manually placed in a first position, (ii) disconnects the energy storage device from the external power source and connects the energy storage device to the interface when the switch is manually placed in a second position, and (iii) disconnects the energy storage device from both the interface and the external power source when the switch is manually placed in a third position.

14. The computer system of claim 8 wherein the controller of the characterization apparatus includes a switch that (i) disconnects the energy storage device from the interface and connects the energy storage device to the external power source in response to a first signal, (ii) disconnects the energy storage device from the external power source and connects the energy storage device to the interface in response to a second signal, and (iii) disconnects the energy storage device from both the interface and the external power source in response to a third signal.

15. The computer system of claim 14 wherein each of the first, second and third signals is a command provided to the controller of the characterization apparatus from the computerized device.

29. The computer system of claim 8 wherein the energy storage device has an energy storage capacity that exceeds a predetermined trip threshold by a predetermined tolerance in order to discharge, as the energy released through the interface and through the circuit breaker device, an amount of energy in excess of the predetermined trip threshold to trip the circuit breaker device when the circuit breaker device has a trip threshold that is less than or equal to the predetermined trip threshold, and to not trip the circuit breaker device when the circuit breaker has a trip threshold that is greater than the predetermined trip threshold.

16. A method for characterizing a circuit breaker device, comprising:

setting the circuit breaker device so that the circuit breaker device trips when a particular level of energy is released through the circuit breaker device in a particular amount of time;

connecting an energy storage device to an external power source to store a particular amount of energy in the energy storage device; and

disconnecting the energy storage device from the external power source and connecting the energy storage device to the circuit breaker device to release energy from the energy storage device through the circuit breaker device regardless of whether the circuit breaker device trips, the circuit breaker device being deemed as belonging to a first category when the circuit breaker device trips in response to the released energy, and the circuit breaker device being deemed as belonging to a second category when the circuit breaker device does not trip in response to the released energy.

17. The method of claim 16 wherein the step of disconnecting the energy storage device from the external power source and connecting the energy storage device to the circuit breaker device includes the step of:

providing direct current through the circuit breaker device when the energy storage device connects to the circuit breaker device.

18. The method of claim 16 wherein the energy storage device includes a capacitor bank, and wherein the step of connecting the energy storage device to the external power source includes the step of applying charge to the capacitor bank.

19. The method of claim 18 wherein the energy storage device further includes a calibration device, and wherein the method further comprises the step of:

adjusting capacitance of the capacitor bank using the calibration device.

20. The method of claim 18 wherein the energy storage device further includes a calibration device, and wherein the method further comprises the step of:

adjusting voltage of the capacitor bank using the calibration device.

21. The method of claim 16 wherein the step of connecting the energy storage device to the external power source includes the step of manually placing a switch in a first position;

and wherein the step of disconnecting the energy storage device from the external power source and connecting the energy storage device to the circuit breaker device includes the step of manually placing the switch in a second position.

22. The method of claim 16 wherein the step of connecting the energy storage device to the external power source includes the step of placing a switch in a first position in response to a first signal, and wherein the step of disconnecting the energy storage device from the external power source and connecting the energy storage device to the circuit breaker device includes the step of placing the switch in a second position in response to a second signal.

30. The method of claim 16 wherein the step of connecting the energy storage device to the external power source includes the step of:

storing, in the energy storage device, an amount of energy that exceeds a predetermined trip threshold by a predetermined tolerance in order to discharge, as the energy released through the interface and through the circuit breaker device, an amount of energy in excess of the predetermined trip threshold to trip the circuit breaker device when the circuit breaker device has a trip threshold that is less than or equal to the predetermined trip threshold, and to not trip the circuit breaker device when the circuit breaker has a trip threshold that is greater than the predetermined trip threshold.

23. A computer system, comprising:

a computerized device for performing computerized operations;

multiple circuit breaker devices, coupled to the computerized device, that protect the computerized device against extreme electrical stresses; and

a characterization apparatus that characterizes each of the circuit breaker devices, the characterization apparatus having;

an interface that connects to the multiple circuit breaker devices,

an energy storage device, coupled to the interface, that is capable of storing and releasing a particular amount of energy, and

a controller, coupled to the energy storage device and the interface, that (i) disconnects the energy storage device from the interface and connects the energy storage device to an external power source to store the particular amount of energy in the energy storage device, and (ii) disconnects the energy storage device from the external power source and selectively connects the energy storage device to the multiple circuit breaker devices through the interface such that, when a circuit breaker device is connected to the energy storage device, energy is released from the energy storage device through the interface and through the circuit breaker device, the circuit breaker device being deemed as belonging to a first category when the circuit breaker device trips in response to the released energy, and the circuit breaker device being deemed as belonging to a second category when the circuit breaker device does not trip in response to the released energy.

24. An apparatus for characterizing a circuit breaker device, comprising:

an interface that is capable of connecting to the circuit breaker device;

an energy storage device that is capable of storing and releasing a particular amount of energy; and

control means, coupled to the energy storage device and the interface, for (i) disconnecting the energy storage device from the interface and connecting the energy storage device to an external power source to store the particular amount of energy in the energy storage device, and (ii) disconnecting the energy storage device from the external power source and connecting the energy storage device to the interface to release, when the circuit breaker device is connected to the interface, energy from the energy storage device through the interface and through the circuit breaker device regardless of whether the circuit breaker device trips, the circuit breaker device being deemed as belonging to a first category when the circuit breaker device trips in response to the released energy, and the circuit breaker device being deemed as belonging to a second category when the circuit breaker device does not trip in response to the released energy.

25. A computer system, comprising:

a computerized device for performing computerized operations;

a circuit breaker device, coupled to the computerized device, that protects the computerized device against an extreme electrical stress; and

a characterization apparatus that characterizes the circuit breaker device, the characterization apparatus having;

an interface that connects to the circuit breaker device,

an energy storage device that is capable of storing and releasing a particular amount of energy, and

control means, coupled to the energy storage device and the interface, for (i) disconnecting the energy storage device from the interface and connecting the energy storage device to an external power source to store the particular amount of energy in the energy storage device, and (ii) disconnecting the energy storage device from the external power source and connecting the energy storage device to the interface such that energy is released from the energy storage device through the interface and through the circuit breaker device, the circuit breaker device being deemed as belonging to a first category when the circuit breaker device trips in response to the released energy, and the circuit breaker device being deemed as belonging to a second category when the circuit breaker device does not trip in response to the released energy.

26. A computer program product that includes a computer readable medium having instructions stored thereon for characterizing a circuit breaker device, such that the instructions, when processed by a computerized device, cause the computerized device to:

set the circuit breaker device so that the circuit breaker device trips when a particular level of energy is released through the circuit breaker device in a particular amount of time;

connect an energy storage device to an external power source to store a particular amount of energy in the energy storage device; and

disconnect the energy storage device from the external power source and connect the energy storage device to the circuit breaker device such that energy is released from the energy storage device through the circuit breaker device, the circuit breaker device being deemed as belonging to a first category when the circuit breaker device trips in response to the released energy, and the circuit breaker device being deemed as belonging to a second category when the circuit breaker device does not trip in response to the released energy.

31. An apparatus for characterizing a circuit breaker device, the apparatus comprising:

an interface that is capable of connecting to the circuit breaker device;

an energy storage device that is capable of storing and releasing a particular amount of energy; and

a controller coupled to the energy storage device and the interface, the controller, when the circuit breaker device is connected to the interface, being configure to selectively;

(i) disconnect the energy storage device from the interface and connect the energy storage device to a power source to store the particular amount of energy in the energy storage device, and

(ii) disconnect the energy storage device from the power source and connect the energy storage device to the interface to release the particular amount of energy through the interface and through the circuit breaker device regardless of whether the circuit breaker trips, the circuit breaker device being deemed to belong to a first category when the circuit breaker device trips in response to the released energy, and the circuit breaker device being deemed to belong to a second category when the circuit breaker device does not trip in response to the released energy.

32. The apparatus of claim 31 wherein the energy storage device has an energy storage capacity that exceeds a predetermined trip threshold by a predetermined tolerance in order to discharge, as the energy released through the interface and through the circuit breaker device, an amount of energy in excess of the predetermined trip threshold to trip the circuit breaker device when the circuit breaker device has a trip threshold that is less than or equal to the predetermined trip threshold, and to not trip the circuit breaker device when the circuit breaker has a trip threshold that is greater than the predetermined trip threshold.

33. The apparatus of claim 31 wherein the energy storage device has an energy storage capacity that exceeds a predetermined trip threshold by a predetermined tolerance to trip circuit breaker devices having trip thresholds substantially equal to the predetermined trip threshold, and to not trip circuit breaker devices having trip thresholds which are substantially higher than the predetermined trip threshold.

34. The apparatus of claim 33 wherein circuit breaker devices that trip in response to the released energy are deemed to be within specification, and circuit breaker devices that do not trip in response to the release energy are deemed to be outside of specification.