ARC FAULT ROOT-CAUSE FINDER SYSTEM AND METHOD

• US 20090248329A1
• Filed: 03/23/2009
• Published: 10/01/2009
• Est. Priority Date: 03/25/2008
• Status: Abandoned Application

• Current Assignee: Siemens Industry Incorporated (Siemens AG)
• Original Assignee: Siemens Energy & Automation Incorporated (Siemens AG)
• Inventors: Restrepo, Carlos
• Application Number:
  US12/408,822
• Publication Number:
  US 20090248329A1
• Time in Patent Office: Days
• US Class Current: 702/59
• CPC Class Codes: G01R 31/1272 of cable, line or wire insulation, e.g. using partial discharge measurements locating faults in cables G01R31/083
• CPC Class Codes: G01R 31/3277 of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches

Abstract

The present invention is directed to an arc fault root-cause finder apparatus and method for determining the root-cause of an arc fault condition. In one embodiment, the arc fault root-cause finder apparatus has a sensing base module mounted to a load panel box having at least one circuit breaker that protects a corresponding branch circuit. The sensing base module has sensing electronics that are electrically connected to the at least one circuit breaker and are configured to sense the occurrence of arcing events in the branch circuit. The sensing base module includes wireless communication electronics to (i) effect transmission of electrical signals that provide information about the occurrence or absence of arcing events in the branch circuit, and (ii) to receive command signals. The arc fault root-cause finder apparatus also has a remote user interface module that has wireless communication electronics configured to establish communication with the sensing base module so as to receive signals transmitted by the sensing base module and to transmit control signals to the sensing base module. The remote user interface module has a visual display device to display information received from the sensing base module about the branch circuit.

Claims

1. An arc fault root-cause finder apparatus, comprising:

a sensing base module mounted to a load panel box having at least one circuit breaker that protects a corresponding branch circuit, the sensing base module comprises sensing electronics that are electrically connected to the at least one circuit breaker and are configured to sense the occurrence of arcing events in the branch circuit, the sensing base module including wireless communication electronics to (i) effect transmission of electrical signals that provide information about the occurrence or absence of arcing events in the branch circuit, and (ii) to receive command signals; and

a remote user interface module comprising wireless communication electronics configured to establish communication with the sensing base module so as to receive signals transmitted by the sensing base module and to transmit control signals to the sensing base module, the remote user interface module further comprising a visual display device to display information received from the sensing base module about the branch circuit.

2. The arc fault root-cause finder apparatus according to claim 1 wherein the sensing electronics of the sensing base module are configured to sense electrical events that indicate an arc fault in the branch circuit under test when a load connected to the branch circuit under test is activated.

3. The arc fault root-cause finder apparatus according to claim 2 wherein the remote user interface module further comprises processing electronics that processes the signals received from sensing base module to provide information on the display device that indicates if an arc has occurred on the branch circuit under test.

4. The arc fault root-cause finder apparatus according to claim 1 wherein the at least one circuit breaker comprises a plurality of circuit breakers and wherein a plurality of branch circuits are connected to the load panel box wherein each circuit breaker protects a corresponding one of the branch circuits, the sensing base module being electrically connected to each circuit breaker so as to sense the occurrence of arc signals on each branch circuit.

5. The arc fault root-cause finder apparatus according to claim 1 wherein the electronics of the sensing base module further comprises processing electronics to process the signals sensed on the branch circuit under test to derive signal data and data storage electronics to store the signal data.

6. The arc fault root-cause finder apparatus according to claim 1 wherein the remote user interface is configured as a handheld device and comprises a keypad device that is in electronic signal communication with the visual display device and wireless communication electronics.

7. The arc fault root-cause finder apparatus according to claim 6 wherein the remote user interface module comprises processing electronics to process signal information received from the sensing base module, the processing electronics being in electrical signal communication with the keypad device.

8. The arc fault root-cause finder apparatus according to claim 7 wherein the remote user interface module comprises electronics to administer and manage all communications exchanged between the sensing base module and the remote user interface module.

9. The arc fault root-cause finder apparatus according to claim 8 wherein the remote user interface module comprises data storage electronics to store the processed signal information.

10. The arc fault root-cause finder apparatus according to claim 9 wherein the remote user interface module further comprises data interfaces to output processed signal information to external data processing equipment.

11. The arc fault root-cause finder apparatus according to claim 1 further comprising a branch protection testing module in wireless signal communication with the remote user interface module and in electrical signal communication with the branch circuit, the branch protection testing module being in electrical signal communication with the circuit branch and comprising electronics and electrical circuitry to (i) generate electrical signals that represent the characteristics of a true arc and ground fault conditions, (ii) inject the electrical signals into the branch circuit, and (iii) determine the integrity of the wiring in the branch circuit, and (iv) determine if the installed circuit breaker associated with the branch circuit is functioning properly.

12. The arc fault root-cause finder apparatus according to claim 11 wherein the remote user interface module contains electronics for generating commands for the branch protection testing module and enabling the wireless communication electronics to transmit the commands to the branch protection testing module.

13. The arc fault root-cause finder apparatus according to claim 12 wherein the remote user interface module contains data storage electronics to store signal data representing the generated electrical signals injected into the branch circuit and the functioning of the installed circuit breaker.

14. The arc fault root-cause finder apparatus according to claim 12 wherein the remote user interface module comprises an AC power cord that is configured to be plugged into an electrical outlet that is in the branch circuit to be tested, the generated electrical signal being injected into the branch circuit through the AC power cord.

15. An arc fault root-cause finder apparatus for use with an electrical power distribution system having at least one circuit breaker that protects a corresponding branch circuit:

a branch protection testing module in electrical signal communication with the branch circuit and comprising wireless communication electronics and additional electronics and electrical circuitry to (i) generate electrical signals that represent the characteristics of a true arc and ground fault conditions, (ii) inject the electrical signals into the branch circuit, and (iii) determine the integrity of the wiring in the branch circuit, (iv) determine if the installed circuit breaker associated with the branch circuit is functioning properly, and (v) generate information signals that indicate if the installed circuit breaker is or is not functioning properly; and

a remote user interface module comprising wireless communication electronics configured to establish communication with the branch protection testing module so as to receive signals transmitted by the branch protection testing module and to transmit control signals to the branch protection testing module, the remote user interface module further comprising a visual display device and processing electronics to process the information signals generated by the branch protection testing apparatus and display the processed information that indicates whether the circuit breaker is functioning properly.

16. A method for finding the root cause of an arc fault, comprising:

providing at least one circuit breaker that protects a corresponding branch circuit having at least one load device electrically connected to the branch circuit;

energizing the at least one load device;

sensing the occurrence arcing events in the branch circuit;

generating electrical signals that represent whether an arcing event has occurred in the branch circuit;

processing the generated electrical signals to derive data that represents either the occurrence or absence of an arcing event in the branch circuit; and

displaying the data on a display device.

17. The method according to claim 16 further comprising storing the data in a data storage device.

18. The method according to claim 16 further comprising:

generating electrical signals that represent the characteristics of a true arc and ground fault conditions; and

injecting the electrical signals into the branch circuit.

19. The method according to claim 18 further comprising:

determining if the installed circuit breaker associated with the branch circuit is functioning properly; and

generating information signals that indicate if the installed circuit breaker is or is not functioning properly.

20. The method according to claim 19 further comprising analyzing the electrical response to the injected signal to determine the integrity of the wiring in the branch circuit.