CA2256243A1 - Arc fault detector with circuit interrupter and early arc fault detection - Google Patents
Arc fault detector with circuit interrupter and early arc fault detectionInfo
- Publication number
- CA2256243A1 CA2256243A1 CA002256243A CA2256243A CA2256243A1 CA 2256243 A1 CA2256243 A1 CA 2256243A1 CA 002256243 A CA002256243 A CA 002256243A CA 2256243 A CA2256243 A CA 2256243A CA 2256243 A1 CA2256243 A1 CA 2256243A1
- Authority
- CA
- Canada
- Prior art keywords
- arc fault
- arc
- neutral conductors
- phase
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
- H02H1/0015—Using arc detectors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
- H02H3/33—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
- H02H3/334—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers with means to produce an artificial unbalance for other protection or monitoring reasons or remote control
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0038—Details of emergency protective circuit arrangements concerning the connection of the detecting means, e.g. for reducing their number
Abstract
An arc fault detector comprised as a stand alone unit and in combination with a ground fault circuit interrupter (GFCI) functions to provide protection from potentially dangerous arc fault conditions. When combined with a GFCI, the combination arc fault/ground fault circuit interrupter (AFCI/GFCI) provides protection from both arc fault and ground fault conditions. A single transformer is used to detect faults between neutral and ground and arc faults. An impedance splits the current flow into two portions so as to generate differential current proportional to the current flowing through the conductors. An early arcing detector periodically tests the AC line for high impedance between the device and a main breaker panel. The AFCI/GFCI device detects both AC line frequencies and high frequencies associated with arcing. Both average and instantaneous values of both AC line frequency and high frequency arcing signals are processed to generate an arc fault signal.
The device allows the arc detector to differentiate between destructive high level arcing and low level arcing such as generated by typical household appliances and equipment. This serves to decrease the occurrence of false tripping. The device also includes a timer circuit, which permits the user to temporarily disable the arc detector, and includes communication means to permit the device to communicate the occurrence and location of the arc fault to a centralized monitoring station.
The device allows the arc detector to differentiate between destructive high level arcing and low level arcing such as generated by typical household appliances and equipment. This serves to decrease the occurrence of false tripping. The device also includes a timer circuit, which permits the user to temporarily disable the arc detector, and includes communication means to permit the device to communicate the occurrence and location of the arc fault to a centralized monitoring station.
Claims (57)
1. An arc fault circuit interrupter (AFCI) device electrically connected to an electrical wiring system between a source of electrical power including line side phase and neutral conductors and a load side including phase and neutral conductors, said device comprising:
arc fault circuit means for detecting high impedance in said electrical wiring system, said arc fault circuit means operative to generate a first arc fault trigger signal when the impedance of said electrical wiring system exceeds a first predetermined threshold;
trigger means for generating a switching signal upon receipt of said first arc fault trigger signal; and switching means electrically connected in series between said line side phase and neutral conductors and said load side phase and neutral conductors, said switching means for disconnecting said source of electrical power to said load side phase and neutral conductors in response to said switching signal.
arc fault circuit means for detecting high impedance in said electrical wiring system, said arc fault circuit means operative to generate a first arc fault trigger signal when the impedance of said electrical wiring system exceeds a first predetermined threshold;
trigger means for generating a switching signal upon receipt of said first arc fault trigger signal; and switching means electrically connected in series between said line side phase and neutral conductors and said load side phase and neutral conductors, said switching means for disconnecting said source of electrical power to said load side phase and neutral conductors in response to said switching signal.
2. The device according to claim 1, further comprising circuit interrupting means for interrupting the flow of current to a load electrically connected to said device in response to predetermined criteria.
3. The device according to claim 2, wherein said circuit interrupting means comprises ground fault circuit interrupter (GFCI) means for detecting the occurrence of a ground fault between said phase conductor and ground or between said neutral conductor and ground, said ground fault circuit means operative to generate a ground fault trigger signal in response to the detection of said ground fault.
4. The device according to claim 1, further comprising a transformer through which said phase and neutral conductors pass, said transformer functioning as a ground/neutral differential transformer for said ground fault circuit means and operative to generate an arc fault sense signal for use by said arc fault circuit means which is proportional to the current flowing through said phase and neutral conductors.
5. The device according to claim 1, wherein said arc fault circuit means comprises test means for periodically testing said electrical wiring system for a high impedance condition.
6. The device according to claim 5, wherein said test means tests said electrical wiring system for a high impedance condition every half cycle of said source of electrical power.
7. The device according to claim 1, wherein said arc fault circuit means comprises means for generating a pulse substantially proportional to the source impedance of said electrical wiring system.
8. The device according to claim 1, wherein said arc fault circuit means comprises means for firing a thyristor device within said ground fault circuit means for a sufficiently brief time so as not to cause said switching means to disconnect said source of electrical power from said load, said firing of said thyristor device briefly loading an LC network across said source of electrical power such that a pulse generated therefrom is indicative of a high impedance condition.
9. The device according to claim 1, wherein said ground fault circuit means comprises a transformer through which said line side phase and neutral conductors pass through and further comprising current splitting means electrically connected to either said phase or neutral conductors for splitting the current flow into two portions such that a small portion flows around said transformer thereby generating a differential current proportional to the current flowing through said phase or neutral conductor.
10. The device according to claim 9, wherein said current splitting means comprises an impedance.
11. The device according to claim 9, wherein said current splitting means comprises a resistance.
12. The device according to claim 9, wherein said current splitting means comprises a reactance.
13. The device according to claim 1, wherein said arc fault circuit means comprises:
current measurement means for sensing the level of AC current flowing through an electrical load placed on said load side of said device;
high frequency circuit means for generating a peak high frequency signal and an average high frequency signal corresponding to the peak and average levels, respectively, of high frequency current flowing through said load;
AC line frequency circuit means for generating a peak AC line frequency signal and an average AC line frequency signal corresponding to the peak and average levels, respectively, of AC line frequency current flowing through said load;
and arc detect means for generating a second arc fault trigger signal in accordance with said peak high frequency signal, said average high frequency signal, said peak AC line frequency signal and said average AC line frequency signal.
current measurement means for sensing the level of AC current flowing through an electrical load placed on said load side of said device;
high frequency circuit means for generating a peak high frequency signal and an average high frequency signal corresponding to the peak and average levels, respectively, of high frequency current flowing through said load;
AC line frequency circuit means for generating a peak AC line frequency signal and an average AC line frequency signal corresponding to the peak and average levels, respectively, of AC line frequency current flowing through said load;
and arc detect means for generating a second arc fault trigger signal in accordance with said peak high frequency signal, said average high frequency signal, said peak AC line frequency signal and said average AC line frequency signal.
14. The device according to claim 13, wherein said arc detect means comprises means for generating said second arc fault trigger signal when either said peak high frequency signal exceeds a second predetermined threshold or said peak AC line frequency signal exceeds a third predetermined threshold, the generation of said second arc fault trigger signal providing an immediate response to dangerous levels of arcing or AC line current.
15. The device according to claim 13, wherein said arc detect means comprises means for generating said second arc fault trigger signal when either said average high frequency signal exceeds a second predetermined threshold or said average AC line frequency signal exceeds a third predetermined threshold, the generation of said second arc fault trigger signal providing an immediate response to dangerous levels of arcing or AC line current.
16. The device according to claim 13, wherein said arc detect means comprises means for generating said second arc fault trigger signal after a variable time delay dependent upon the level of arcing detected or on the level of AC line current detected.
17. The device according to claim 13, wherein said arc detect means comprises means for generating said second arc fault trigger signal based on a plurality of arc fault trip levels which are dependent on the magnitude of the average AC line current.
18. The device according to claim 13, wherein said arc detect means comprises means for generating said second arc fault trigger signal based on a plurality of arc fault trip levels which are dependent on the level of AC line current detected.
19. The device according to claim 13, further comprising means for simultaneously detecting the peak and average magnitude of the high frequency arcing current and of the AC
line current so as to provide an immediate response to dangerous levels in either arcing or AC
line current.
line current so as to provide an immediate response to dangerous levels in either arcing or AC
line current.
20. The device according to claim 13, further comprising means for partially disabling arc detection for a finite period of time, the disabling of arc detection providing a user with the ability to use an electrical device exhibiting arcing, said timer means enabling arc detection after use of said electrical device has been discontinued.
21. The device according to claim 1, further comprising communication means for communication the generation of said switching signal.
22. The device according to claim 1, further comprising means for receiving an external disable command and disabling arc detection in accordance therewith.
23. The device according to claim 1, further comprising means for a user to manually turn arc detection on and off.
24. The device according to claim 1, further comprising means for disabling arc detection during daylight hours and enabling arc detection during night hours.
25. The device according to claim 1, further comprising means for disabling and enabling arc detection in accordance with signals received from a remote infrared (IR) transmitter.
26. An arc fault circuit interrupter (AFCI) device electrically connected to an electrical wiring system between a source of electrical power including line side phase and neutral conductors and a load side including phase and neutral conductors, said device comprising:
splitting means for splitting the current flowing through said device into two portions such that a signal proportional to the current flow through said phase and neutral conductors is generated;
arc fault circuit means for detecting the occurrence of an arc fault occurring within said electrical wiring system, said arc fault circuit means operative to generate an arc fault trigger signal in response to the detection of an arc fault;
trigger means coupled to said arc fault circuit means, said trigger means for generating a switching signal upon receipt of said arc fault trigger signal;
switching means electrically connected in series between said line side phase and neutral conductors and said load side phase and neutral conductors, said switching means for disconnecting said source of electrical power to said load side phase and neutral conductors in response to said switching signal; and timer means for partially disabling arc detection for a finite period of time, the disabling of arc detection providing a user with the ability to use an electrical device exhibiting arcing, said timer means enabling arc detection after use of said electrical device has been discontinued.
splitting means for splitting the current flowing through said device into two portions such that a signal proportional to the current flow through said phase and neutral conductors is generated;
arc fault circuit means for detecting the occurrence of an arc fault occurring within said electrical wiring system, said arc fault circuit means operative to generate an arc fault trigger signal in response to the detection of an arc fault;
trigger means coupled to said arc fault circuit means, said trigger means for generating a switching signal upon receipt of said arc fault trigger signal;
switching means electrically connected in series between said line side phase and neutral conductors and said load side phase and neutral conductors, said switching means for disconnecting said source of electrical power to said load side phase and neutral conductors in response to said switching signal; and timer means for partially disabling arc detection for a finite period of time, the disabling of arc detection providing a user with the ability to use an electrical device exhibiting arcing, said timer means enabling arc detection after use of said electrical device has been discontinued.
27. An arc fault circuit interrupter (AFCI) device electrically connected to an electrical wiring system between a source of electrical power including line side phase and neutral conductors and a load side including phase and neutral conductors, said device comprising:
first arc fault circuit means for measuring impedance in said electrical wiring system, said first arc fault circuit means operative to generate a first arc fault trigger signal when the impedance of said electrical wiring system exceeds a first predetermined threshold;
second arc fault circuit means for measuring the level of peak high frequency current and peak AC line frequency current flowing through said device to an electrical load connected to said load side, said second arc fault circuit meansoperative to generate a second arc fault trigger signal when said peak high frequency current exceeds a second predetermined threshold or when said peak AC line frequency current exceeds a third predetermined threshold;
trigger means for generating a switching signal upon receipt of said first arc fault trigger signal or said second arc fault trigger signal; and switching means electrically connected in series between said line side phase and neutral conductors and said load side phase and neutral conductors, said switching means for disconnecting said source of electrical power to said load side phase and neutral conductors in response to said switching signal.
first arc fault circuit means for measuring impedance in said electrical wiring system, said first arc fault circuit means operative to generate a first arc fault trigger signal when the impedance of said electrical wiring system exceeds a first predetermined threshold;
second arc fault circuit means for measuring the level of peak high frequency current and peak AC line frequency current flowing through said device to an electrical load connected to said load side, said second arc fault circuit meansoperative to generate a second arc fault trigger signal when said peak high frequency current exceeds a second predetermined threshold or when said peak AC line frequency current exceeds a third predetermined threshold;
trigger means for generating a switching signal upon receipt of said first arc fault trigger signal or said second arc fault trigger signal; and switching means electrically connected in series between said line side phase and neutral conductors and said load side phase and neutral conductors, said switching means for disconnecting said source of electrical power to said load side phase and neutral conductors in response to said switching signal.
28. An arc fault circuit interrupter (AFCI) device electrically connected to an electrical wiring system between a source of electrical power including line side phase and neutral conductors and a load side including phase and neutral conductors, said device comprising:
first arc fault circuit means for detecting high impedance in said electrical wiring system, said first arc fault circuit means operative to generate a first arc fault trigger signal when the impedance of said electrical wiring system exceeds a first predetermined threshold;
second arc fault circuit means for measuring the level of average high frequencycurrent and average AC line frequency current flowing through said device to an electrical load connected to said load side, said second arc fault circuit means operative to generate a second arc fault trigger signal when said average high frequency current exceeds a second predetermined threshold or when said average AC line frequency current exceeds a third predetermined threshold;
trigger means for generating a switching signal upon receipt of said first arc fault trigger signal or said second arc fault trigger signal; and switching means electrically connected in series between said line side phase and neutral conductors and said load side phase and neutral conductors, said switching means for disconnecting said source of electrical power to said load side phase and neutral conductors in response to said switching signal.
first arc fault circuit means for detecting high impedance in said electrical wiring system, said first arc fault circuit means operative to generate a first arc fault trigger signal when the impedance of said electrical wiring system exceeds a first predetermined threshold;
second arc fault circuit means for measuring the level of average high frequencycurrent and average AC line frequency current flowing through said device to an electrical load connected to said load side, said second arc fault circuit means operative to generate a second arc fault trigger signal when said average high frequency current exceeds a second predetermined threshold or when said average AC line frequency current exceeds a third predetermined threshold;
trigger means for generating a switching signal upon receipt of said first arc fault trigger signal or said second arc fault trigger signal; and switching means electrically connected in series between said line side phase and neutral conductors and said load side phase and neutral conductors, said switching means for disconnecting said source of electrical power to said load side phase and neutral conductors in response to said switching signal.
29. An arc fault circuit interrupter (AFCI) device electrically connected to an electrical wiring system between a source of electrical power including line side phase and neutral conductors and a load side including phase and neutral conductors, said device comprising:
first arc fault circuit means for detecting high impedance in said electrical wiring system, said first arc fault circuit means operative to generate a first arc fault trigger signal when the impedance of said electrical wiring system exceeds a first predetermined threshold;
second arc fault circuit means for measuring the level of average high frequencycurrent and average AC line frequency current flowing through said device to an electrical load connected to said load side, said second arc fault circuit means operative to generate a second arc fault trigger signal utilizing a plurality of trip levels of said average high frequency current based on said level of average AC line frequency current;
trigger means for generating a switching signal upon receipt of said first arc fault trigger signal or said second arc fault trigger signal; and switching means electrically connected in series between said line side phase and neutral conductors and said load side phase and neutral conductors, said switching means for disconnecting said source of electrical power to said load side phase and neutral conductors in response to said switching signal.
first arc fault circuit means for detecting high impedance in said electrical wiring system, said first arc fault circuit means operative to generate a first arc fault trigger signal when the impedance of said electrical wiring system exceeds a first predetermined threshold;
second arc fault circuit means for measuring the level of average high frequencycurrent and average AC line frequency current flowing through said device to an electrical load connected to said load side, said second arc fault circuit means operative to generate a second arc fault trigger signal utilizing a plurality of trip levels of said average high frequency current based on said level of average AC line frequency current;
trigger means for generating a switching signal upon receipt of said first arc fault trigger signal or said second arc fault trigger signal; and switching means electrically connected in series between said line side phase and neutral conductors and said load side phase and neutral conductors, said switching means for disconnecting said source of electrical power to said load side phase and neutral conductors in response to said switching signal.
30. An arc fault circuit interrupter (AFCI) device electrically connected to an electrical wiring system between a source of electrical power including line side phase and neutral conductors and a load side including phase and neutral conductors, said device comprising:
current measurement means for sensing the level of AC current flowing through an electrical load placed on said load side of said device;
first arc fault circuit means for detecting a high impedance condition in said electrical wiring system;
high frequency means for generating a high frequency signal corresponding to the level of high frequency current flowing through said load;
AC line frequency means for generating an AC line frequency signal corresponding to the level of AC line frequency current flowing through said load;
arc detect means for generating an arc fault trigger signal in accordance with said high frequency signal and said AC line frequency signal;
trigger means for generating a switching signal upon receipt of said arc fault trigger signal; and switching means electrically connected in series between said line side phase and neutral conductors and said load side phase and neutral conductors, said switching means for disconnecting said source of electrical power to said load side phase and neutral conductors in response to said switching signal.
current measurement means for sensing the level of AC current flowing through an electrical load placed on said load side of said device;
first arc fault circuit means for detecting a high impedance condition in said electrical wiring system;
high frequency means for generating a high frequency signal corresponding to the level of high frequency current flowing through said load;
AC line frequency means for generating an AC line frequency signal corresponding to the level of AC line frequency current flowing through said load;
arc detect means for generating an arc fault trigger signal in accordance with said high frequency signal and said AC line frequency signal;
trigger means for generating a switching signal upon receipt of said arc fault trigger signal; and switching means electrically connected in series between said line side phase and neutral conductors and said load side phase and neutral conductors, said switching means for disconnecting said source of electrical power to said load side phase and neutral conductors in response to said switching signal.
31. The device according to claims 26, 27, 28, 29 or 30, further comprising circuit interrupting means for interrupting the flow of current to a load electrically connected to said device in response to predetermined criteria.
32. The device according to claim 31, wherein said circuit interrupting means comprises ground fault circuit interrupter (GFCI) means for detecting the occurrence of a ground fault between said phase conductor and ground or between said neutral conductor and ground, said ground fault circuit means operative to generate a ground fault trigger signal in response to the detection of said ground fault.
33. The device according to claims 27, 28, 29 or 30, wherein said first arc fault circuit means comprises test means for testing said electrical wiring system for a high impedance condition on a periodic basis.
34. The device according to claim 33, wherein said test means tests said electrical wiring system for a high impedance condition every half cycle of said source of electrical power.
35. The device according to claims 27, 28, 29 or 30, wherein said first arc fault circuit means comprises means for generating a pulse substantially proportional to the source impedance of said electrical wiring system.
36. The device according to claims 27, 28 or 29, wherein said first arc fault circuit means comprises means for firing a thyristor device coupled to said switching means briefly enough so as not to cause said switching means to disconnect said source of electrical power from said load, said firing of said thyristor device briefly loading an LC network across said source of electrical power such that a pulse generated therefrom is indicative of a high impedance condition.
37. The device according to claims 27, 29 or 30, further comprising circuit interrupting means comprising a transformer through which said line side phase and neutral conductors pass through, and further comprising current splitting means electrically connected to either said phase or neutral conductors for splitting the current flow into two portions such that a small portion flows around said transformer thereby generating a differential current proportional to the current flowing through said phase or neutral conductor.
38. The device according to claims 26, 27, 28, 29 or 30, further comprising a transformer through which said phase and neutral conductors pass, said transformer functioning as a ground/neutral differential transformer and operative to generate an arc fault sense signal for use by said arc fault circuit means which is proportional to the current flowing through said phase and neutral conductors.
39. The device according to claim 38, wherein said current splitting means comprises an impedance.
40. The device according to claim 38, wherein said current splitting means comprises a resistance.
41. The device according to claim 38, wherein said current splitting means comprises a reactance.
42. The device according to claims 26, 27, 28, 29 or 30, further comprising means for partially disabling arc detection for a finite period of time, the disabling of arc detection providing a user with the ability to use an electrical device exhibiting arcing, said timer means enabling arc detection after use of said electrical device has been discontinued.
43. The device according to claims 26, 27, 28, 29 or 30, further comprising communication means for communicating the generation of said switching signal.
44. The device according to claims 26, 27, 28, 29 or 30, further comprising means for receiving an external disable command and disabling arc detection in accordance therewith.
45. The device according to claims 26, 27, 28, 29 or 30, further comprising means for a user to manually turn arc detection on and off.
46. The device according to claims 26, 27, 28, 29 or 30, further comprising means for disabling arc detection during daylight hours and enabling arc detection during night hours.
47. The device according to claims 26, 27, 28, 29 or 30, further comprising means for disabling and enabling arc detection in accordance with signals received from a remote infrared (IR) transmitter.
48. In an arc fault circuit interrupter (AFCI) device connected to an electrical wiring system via line side phase and neutral conductors and load side phase and neutral conductors, a method of detecting arc faults, comprising the steps of:
detecting the existence of a high impedance condition in said electrical wiring system and generating a first arc fault signal in response thereto;
sensing the level of AC current flowing through an electrical load placed on said load side of said device;
generating a high frequency signal corresponding to the level of high frequency current flowing through said load;
generating an AC line frequency signal corresponding to the level of AC line frequency current flowing through said load;
generating a second arc fault trigger signal in accordance with said high frequency signal and said AC line frequency signal; and disconnecting said source of electrical power to said load side phase and neutral conductors in response to said first and second arc fault signals.
detecting the existence of a high impedance condition in said electrical wiring system and generating a first arc fault signal in response thereto;
sensing the level of AC current flowing through an electrical load placed on said load side of said device;
generating a high frequency signal corresponding to the level of high frequency current flowing through said load;
generating an AC line frequency signal corresponding to the level of AC line frequency current flowing through said load;
generating a second arc fault trigger signal in accordance with said high frequency signal and said AC line frequency signal; and disconnecting said source of electrical power to said load side phase and neutral conductors in response to said first and second arc fault signals.
49. The method according to claim 48, further comprising the step of detecting the occurrence of a ground fault between said phase conductor and ground or between said neutral conductor and ground and generating a ground fault trigger signal in response thereto.
50. The method according to claim 48, wherein said step of sensing comprises the step of splitting the current flowing through either with said phase or neutral conductor such that a differential current proportional to the current flowing through said phase or neutral conductor is generated.
51. The method according to claim 48, further comprising the step of providing atransformer through which said phase and neutral conductors pass, said transformer utilized to detect the occurrence of a ground fault between said phase and neutral conductor and to sense the level of current flowing through said electrical load.
52. The method according to claim 48, further comprising the step of partially disabling arc detection for a finite period of time, the disabling of arc detection providing a user with the ability to use an electrical device exhibiting arcing, and enabling arc detection after use of said electrical device has been discontinued.
53. The method according to claim 48, further comprising the step of communicating the generation of said switching signal.
54. The method according to claim 48, further comprising the step of receiving an external disable command and disabling arc detection in accordance therewith.
55. The method according to claim 48, further comprising the step of providing the ability for a user to manually turn arc detection on and off.
56. The method according to claim 48, further comprising the step of disabling arc detection during daylight hours and enabling arc detection during night hours.
57. The method according to claim 48, further comprising the step of disabling and enabling arc detection in accordance with signals received from a remote infrared (IR) transmitter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/993,745 | 1997-12-19 | ||
| US08/993,745 US6128169A (en) | 1997-12-19 | 1997-12-19 | Arc fault detector with circuit interrupter and early arc fault detection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2256243A1 true CA2256243A1 (en) | 1999-06-19 |
| CA2256243C CA2256243C (en) | 2011-10-04 |
Family
ID=25539884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2256243A Expired - Lifetime CA2256243C (en) | 1997-12-19 | 1998-12-16 | Arc fault detector with circuit interrupter and early arc fault detection |
Country Status (2)
| Country | Link |
|---|---|
| US (2) | US6128169A (en) |
| CA (1) | CA2256243C (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6275044B1 (en) | 1998-07-15 | 2001-08-14 | Square D Company | Arcing fault detection system |
| US6313641B1 (en) | 1995-03-13 | 2001-11-06 | Square D Company | Method and system for detecting arcing faults and testing such system |
| US6377427B1 (en) | 1995-03-13 | 2002-04-23 | Square D Company | Arc fault protected electrical receptacle |
| US6414829B1 (en) | 1998-02-19 | 2002-07-02 | Square D Company | Arc fault circuit interrupter |
| US6456471B1 (en) | 1998-02-19 | 2002-09-24 | Square D Company | Test, reset and communications operations in an ARC fault circuit interrupter with optional memory and/or backup power |
| US6477021B1 (en) | 1998-02-19 | 2002-11-05 | Square D Company | Blocking/inhibiting operation in an arc fault detection system |
| US6532424B1 (en) | 1995-03-13 | 2003-03-11 | Square D Company | Electrical fault detection circuit with dual-mode power supply |
| US6567250B1 (en) | 1998-02-19 | 2003-05-20 | Square D Company | Arc fault protected device |
| US6621669B1 (en) | 1998-02-19 | 2003-09-16 | Square D Company | Arc fault receptacle with a feed-through connection |
| US6625550B1 (en) | 1998-02-19 | 2003-09-23 | Square D Company | Arc fault detection for aircraft |
| US6782329B2 (en) | 1998-02-19 | 2004-08-24 | Square D Company | Detection of arcing faults using bifurcated wiring system |
Families Citing this family (106)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6128169A (en) * | 1997-12-19 | 2000-10-03 | Leviton Manufacturing Co., Inc. | Arc fault detector with circuit interrupter and early arc fault detection |
| EP0963024A1 (en) * | 1998-05-14 | 1999-12-08 | Siemens Aktiengesellschaft | Protective switching device |
| US7400477B2 (en) | 1998-08-24 | 2008-07-15 | Leviton Manufacturing Co., Inc. | Method of distribution of a circuit interrupting device with reset lockout and reverse wiring protection |
| US6437700B1 (en) | 2000-10-16 | 2002-08-20 | Leviton Manufacturing Co., Inc. | Ground fault circuit interrupter |
| US6556395B1 (en) * | 1999-07-07 | 2003-04-29 | Leviton Manufacturing Co., Inc. | Ground fault circuit interrupter for circuits operating with non-sinusoidal waveforms |
| US6388849B1 (en) * | 2000-02-14 | 2002-05-14 | Eaton Corporation | ARC fault detector responsive to average instantaneous current and step increases in current and circuit breaker incorporating same |
| US7154718B1 (en) | 2004-07-28 | 2006-12-26 | Pass & Seymour, Inc. | Protection device with power to receptacle cut-off |
| US7173799B1 (en) | 2004-02-03 | 2007-02-06 | Pass & Seymour, Inc. | Protection device with a sandwiched cantilever breaker mechanism |
| US7133266B1 (en) * | 2000-11-21 | 2006-11-07 | Pass & Seymour, Inc. | Electrical wiring device |
| US8299799B2 (en) * | 2000-02-17 | 2012-10-30 | Pass & Seymour, Inc. | Electrical device with miswire protection and automated testing |
| US9362077B2 (en) | 2000-02-17 | 2016-06-07 | Pass & Seymour, Inc. | Electrical device with miswire protection and automated testing |
| US7598828B1 (en) | 2004-07-28 | 2009-10-06 | Pass & Seymour, Inc. | Protection device with a sandwiched cantilever breaker mechanism |
| US20020063565A1 (en) * | 2000-04-04 | 2002-05-30 | Stroth John E. | Arc fault current interrupter testing device |
| US6658360B1 (en) * | 2000-06-09 | 2003-12-02 | Siemens Aktiengesellschaft | Software-controlled evaluation of fault currents for protection and monitoring systems |
| US6678137B1 (en) * | 2000-08-04 | 2004-01-13 | General Electric Company | Temperature compensation circuit for an arc fault current interrupting circuit breaker |
| US6683768B2 (en) * | 2000-09-28 | 2004-01-27 | Turnstone Systems, Inc. | Circuit topology for protecting vulnerable micro electro-mechanical system (MEMS) and electronic relay devices |
| US6671149B1 (en) * | 2000-09-28 | 2003-12-30 | Turnstone Systems, Inc. | Systems and methods for protecting vulnerable micro electro-mechanical system (MEMS) and electronic relay devices |
| US8514529B1 (en) | 2000-11-21 | 2013-08-20 | Pass & Seymour, Inc. | Electrical wiring device |
| US6751528B1 (en) | 2000-11-27 | 2004-06-15 | General Electric Company | Residential circuit arc detection |
| GB0104763D0 (en) * | 2001-02-27 | 2001-04-18 | Smiths Group Plc | Arc detection |
| US6633824B2 (en) * | 2001-03-29 | 2003-10-14 | Siemens Energy & Automation, Inc. | Direct current electrical system arc detection apparatus and method |
| US6807036B2 (en) * | 2001-04-26 | 2004-10-19 | Hubbell Incorporated | Digital fault interrupter with self-testing capabilities |
| US6859044B2 (en) * | 2001-06-20 | 2005-02-22 | Arris International, Inc. | Method and architecture for fault protection on a broadband communications network power passing tap |
| US6717786B2 (en) | 2001-10-30 | 2004-04-06 | The Boeing Company | Automatic voltage source selector for circuit breakers utilizing electronics |
| US20030156367A1 (en) * | 2002-02-01 | 2003-08-21 | Macbeth Bruce F. | Arc fault circuit interrupter with upstream impedance detector |
| US6744260B2 (en) | 2002-07-17 | 2004-06-01 | Eaton Corporation | Tester for a plurality of circuit breakers having a range of rated currents and multiple trip functions |
| US7003435B2 (en) * | 2002-10-03 | 2006-02-21 | Leviton Manufacturing Co., Inc. | Arc fault detector with circuit interrupter |
| US7253640B2 (en) * | 2003-01-13 | 2007-08-07 | Eaton Corporation | Arc fault detector and method for locating an arc fault |
| US7038897B2 (en) * | 2003-02-12 | 2006-05-02 | Honeywell International Inc. | Arc fault detection system |
| US6850073B2 (en) * | 2003-03-06 | 2005-02-01 | Eaton Corporation | Power circuit tester apparatus and method |
| US7068045B2 (en) * | 2003-07-25 | 2006-06-27 | Gaton Corporation | Apparatus and method for real time determination of arc fault energy, location and type |
| US7492562B2 (en) * | 2003-09-10 | 2009-02-17 | Siemens Energy & Automation, Inc. | AFCI temperature compensated current sensor |
| US7751160B1 (en) | 2004-07-28 | 2010-07-06 | Pass & Seymour, Inc. | Protective device with separate end-of-life trip mechanism |
| US6972572B2 (en) * | 2003-12-22 | 2005-12-06 | Leviton Manufacturing Co., Inc. | Arc fault detector |
| US6958895B1 (en) | 2004-02-03 | 2005-10-25 | Pass & Seymour, Inc. | Protection device with a contact breaker mechanism |
| US7062388B2 (en) * | 2004-03-18 | 2006-06-13 | General Electric Company | Series arc detection |
| BRPI0512994B1 (en) * | 2004-07-05 | 2017-12-05 | Pepperl & Fuchs | "ELECTRIC CIRCUIT WITH FLAMMABLE ARC PREVENTION DEVICE" |
| US7554781B1 (en) * | 2004-07-29 | 2009-06-30 | Pass & Seymour, Inc. | Protective device with an auxiliary switch |
| US7164275B2 (en) * | 2004-09-30 | 2007-01-16 | Rockwell Automation Technologies, Inc. | AC power line impedance monitoring method and system |
| US7091723B2 (en) * | 2004-11-12 | 2006-08-15 | Michael Lee Simmons | AFCI circuit test module |
| US7443309B2 (en) * | 2004-12-01 | 2008-10-28 | Hubbell Incorporated | Self testing ground fault circuit interrupter (GFCI) |
| CA2597060A1 (en) * | 2005-02-07 | 2006-08-17 | Jeffrey L. Dehaven | Arc fault and ground fault circuit interrupter tester apparatus and method |
| US7391218B2 (en) * | 2005-03-11 | 2008-06-24 | Honeywell International Inc. | Method and apparatus for generalized arc fault detection |
| US7526392B2 (en) * | 2005-03-30 | 2009-04-28 | Rockwell Automation Technologies, Inc. | Power line parameter analysis method and system |
| KR100638635B1 (en) * | 2005-06-02 | 2006-10-27 | (주)갑진 | Earth leakage circuit breaker |
| US7183721B2 (en) * | 2005-06-30 | 2007-02-27 | Osram Sylvania, Inc. | Ballast with circuit for detecting and eliminating an arc condition |
| WO2007013724A1 (en) * | 2005-07-29 | 2007-02-01 | Electronics And Telecommunications Research Institute | Abrupt metal-insulator transition device, circuit for removing high-voltage noise using the abrupt metal-insulator transition device, and electrical and/or electronic system comprising the circuit |
| KR100714115B1 (en) * | 2005-07-29 | 2007-05-02 | 한국전자통신연구원 | Abrupt MIT device, circuit for removing high voltage noise adapting the same device, and electrical and electronic system comprising the same circuit |
| US7791848B2 (en) * | 2005-08-08 | 2010-09-07 | Hubbell Incorporated | Self testing ground fault circuit interrupter (GFCI) with end of life (EOL) detection that rejects false EOL information |
| US7733617B2 (en) * | 2005-08-08 | 2010-06-08 | Hubbell Incorporated | Self testing digital fault interrupter |
| US7292011B2 (en) * | 2005-08-23 | 2007-11-06 | Hamilton Sundstrand Corporation | Electrical protection of a generator controller |
| US7253637B2 (en) * | 2005-09-13 | 2007-08-07 | Square D Company | Arc fault circuit interrupter system |
| CN1988099B (en) * | 2005-12-23 | 2010-05-05 | 通领科技集团有限公司 | Leakage current detection breaker with fire-proof shield |
| CN1328591C (en) * | 2005-12-26 | 2007-07-25 | 通领科技集团有限公司 | Earth-fault circuit breaker life termination detecting-protecting method and its circuit |
| CN1328587C (en) * | 2005-12-27 | 2007-07-25 | 通领科技集团有限公司 | Life-stopping intelligent inspection and inspector for leakage protector |
| CN1328588C (en) * | 2005-12-27 | 2007-07-25 | 通领科技集团有限公司 | Life-stopping intelligent inspection and inspector for leakage protector |
| CN1319101C (en) * | 2005-12-27 | 2007-05-30 | 通领科技集团有限公司 | Lift stop intelligent detection and detector for leakage protector |
| US7558038B2 (en) * | 2006-02-15 | 2009-07-07 | Wiese Gregory S | Field upgradeable circuit breaker firmware and programmer therefor |
| US7441173B2 (en) * | 2006-02-16 | 2008-10-21 | Siemens Energy & Automation, Inc. | Systems, devices, and methods for arc fault detection |
| CN100349345C (en) * | 2006-02-21 | 2007-11-14 | 通领科技集团有限公司 | Intelligent detecting method and appliance for service stop of electricity leakage protector |
| US20070208520A1 (en) * | 2006-03-01 | 2007-09-06 | Siemens Energy & Automation, Inc. | Systems, devices, and methods for arc fault management |
| CN1321430C (en) * | 2006-03-06 | 2007-06-13 | 通领科技集团有限公司 | Earthing fault breaker actuator having pressure balance auto compensation |
| US7499250B2 (en) * | 2006-04-19 | 2009-03-03 | Siemens Energy & Automation, Inc. | Systems, devices, and methods for temperature compensation in arc fault detection systems |
| US7315437B2 (en) * | 2006-05-31 | 2008-01-01 | Hubbell Incorporated | Self testing ground fault circuit interrupter (GFCI) with end of life (EOL) indicator, secondary power supply for EOL and self test circuitry, and device for opening line hot when EOL occurs |
| ES2340884T3 (en) * | 2006-06-15 | 2010-06-10 | Shakira Limited | SWITCHING CIRCUIT. |
| CA2656559A1 (en) * | 2006-06-30 | 2008-01-10 | Leviton Manufacturing Company, Inc. | Circuit interrupter with live ground detector |
| US7876539B2 (en) * | 2006-10-23 | 2011-01-25 | Pentair Pump Group, Inc. | Electrical apparatus with current dampening device |
| US7697252B2 (en) * | 2007-08-15 | 2010-04-13 | Leviton Manufacturing Company, Inc. | Overvoltage device with enhanced surge suppression |
| US7697248B2 (en) * | 2007-12-14 | 2010-04-13 | Tomimbang Wendell E | Electrical arc fault circuit interrupter apparatus and method |
| CN101910856B (en) | 2008-01-29 | 2014-06-18 | 立维腾制造有限公司 | Self testing fault circuit interrupter apparatus and method |
| US20100007354A1 (en) * | 2008-07-08 | 2010-01-14 | Deaver Sr Brian J | System and Method for Predicting a Fault in a Power Line |
| US7924537B2 (en) * | 2008-07-09 | 2011-04-12 | Leviton Manufacturing Company, Inc. | Miswiring circuit coupled to an electrical fault interrupter |
| US8213138B2 (en) * | 2008-08-08 | 2012-07-03 | General Electric Company | Circuit breaker with arc fault detection and method of operation |
| GB2463689B (en) * | 2008-09-22 | 2010-11-24 | Ge Aviat Systems Ltd | Arc fault location detection for aircraft wiring |
| US20110181295A1 (en) * | 2010-01-22 | 2011-07-28 | Livewire Test Labs, Inc. | Fault detection using combined reflectometry and electronic parameter measurement |
| US8373570B2 (en) | 2010-10-26 | 2013-02-12 | Cooper Technologies Company | ARC fault detection method and apparatus |
| US8861146B2 (en) | 2010-12-17 | 2014-10-14 | Pass & Seymour, Inc. | Electrical wiring device with protective features |
| WO2012135241A2 (en) * | 2011-03-31 | 2012-10-04 | General Electric Company | Prognostic system and method for fault detection in electrical insulation |
| US8346207B2 (en) | 2011-05-25 | 2013-01-01 | Ian Alexander Stewart | Fault location and control system for distribution lines |
| US9551751B2 (en) | 2011-06-15 | 2017-01-24 | Ul Llc | High speed controllable load |
| US8599523B1 (en) | 2011-07-29 | 2013-12-03 | Leviton Manufacturing Company, Inc. | Arc fault circuit interrupter |
| US8599522B2 (en) | 2011-07-29 | 2013-12-03 | Leviton Manufacturing Co., Inc. | Circuit interrupter with improved surge suppression |
| CN103875144B (en) * | 2011-10-14 | 2016-04-13 | Sma太阳能技术股份公司 | For detecting the method and apparatus of the electric arc in DC circuit |
| US8605405B2 (en) * | 2011-11-21 | 2013-12-10 | Abb Technology Ag | Method and circuit for increasing the speed of electromechanical output on a protective relay |
| US9007087B2 (en) * | 2012-10-11 | 2015-04-14 | Hamilton Sundstrand Corporation | System and method for automated failure detection of hold-up power storage devices |
| US9430012B2 (en) * | 2012-12-11 | 2016-08-30 | General Electric Company | Systems and methods of transformer failure detection and control |
| US9819177B2 (en) | 2013-03-15 | 2017-11-14 | Pass & Seymour, Inc. | Protective device with non-volatile memory miswire circuit |
| US9366713B2 (en) | 2013-05-23 | 2016-06-14 | Pentair Thermal Management Llc | Arc fault detection system and method |
| US9366716B2 (en) | 2013-05-23 | 2016-06-14 | Pentair Thermal Management Llc | Sub-harmonic arc fault detection system and method |
| US9236729B2 (en) | 2013-08-15 | 2016-01-12 | Microsoft Technology Licensing, Llc | Anti-arcing circuit |
| US9759758B2 (en) | 2014-04-25 | 2017-09-12 | Leviton Manufacturing Co., Inc. | Ground fault detector |
| US9325167B2 (en) * | 2014-06-19 | 2016-04-26 | General Electric Company | Method, system, and apparatus for providing arc flash mitigation |
| WO2016100934A1 (en) * | 2014-12-18 | 2016-06-23 | Ali Mohd Hasan | Apparatus for mitigation of adverse effects of geomagnetically induced currents on transformers |
| US10554058B2 (en) * | 2015-05-14 | 2020-02-04 | Media Tek Inc. | Systems and methods for monitoring an operating status of a connector |
| US9837809B2 (en) * | 2015-05-27 | 2017-12-05 | Korea Institute Of Energy Research | Arc detection apparatus, arc detecting method, and power system |
| CN108603906A (en) * | 2015-10-18 | 2018-09-28 | 艾图歌技术有限公司 | Multi-functional fault circuit interrupter device device and method |
| GB2546553B (en) * | 2016-01-25 | 2020-08-26 | Ge Aviat Systems Ltd | Circuit and method for detecting arc faults |
| US10060964B2 (en) * | 2016-03-21 | 2018-08-28 | Eaton Intelligent Power Limited | Arc fault circuit interrupter detector systems including super regenerative high frequency receiver |
| US20180145497A1 (en) * | 2016-11-23 | 2018-05-24 | Schneider Electric USA, Inc. | Method to utilize multiple configuration software for df/cafi breakers |
| RU2691738C1 (en) * | 2018-05-18 | 2019-06-18 | Федеральное государственное бюджетное учреждение науки Институт проблем управления им. В.А. Трапезникова Российской академии наук | Device for remote disconnection of damaged section of electric circuit |
| US11079424B2 (en) * | 2018-12-07 | 2021-08-03 | Schneider Electric USA, Inc. | Combined low frequency and high frequency current sensor |
| US10727010B1 (en) | 2019-01-29 | 2020-07-28 | Arc Suppression Technologies | Power contact end-of-life (EoL) predictor apparatus and method |
| JP2022547315A (en) * | 2019-09-11 | 2022-11-11 | アーク サプレッション テクノロジーズ | Power contact fault removal device |
| US20210270901A1 (en) * | 2020-02-27 | 2021-09-02 | Pass & Seymour, Inc. | Tester for a frequency-dependent ground fault interrupt wiring device |
| CN112924824B (en) * | 2021-01-28 | 2023-04-07 | 四川大学 | Cable insulation state monitoring method based on carbonization channel evolution process |
| CN113193595B (en) * | 2021-05-12 | 2023-01-06 | 丰郅(上海)新能源科技有限公司 | Safety management system and safety management method for photovoltaic module |
Family Cites Families (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2247746C3 (en) * | 1972-09-29 | 1975-11-27 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Method of measuring a line impedance |
| US5202662A (en) * | 1978-09-07 | 1993-04-13 | Leviton Manufacturing Company, Inc. | Resettable circuit breaker for use in ground fault circuit interrupters and the like |
| US4376243A (en) * | 1981-01-26 | 1983-03-08 | General Motors Corporation | Arc detector for electric rod furnace |
| US4466071A (en) * | 1981-09-28 | 1984-08-14 | Texas A&M University System | High impedance fault detection apparatus and method |
| US4658322A (en) * | 1982-04-29 | 1987-04-14 | The United States Of America As Represented By The Secretary Of The Navy | Arcing fault detector |
| US4709293A (en) * | 1983-12-05 | 1987-11-24 | Leviton Manufacturing Company, Inc. | Shock hazard protection system |
| FR2621748B1 (en) * | 1987-10-09 | 1996-07-05 | Merlin Gerin | STATIC TRIGGER OF A MOLDED CASE CIRCUIT BREAKER |
| US5206596A (en) * | 1991-03-28 | 1993-04-27 | Eaton Corporation | Arc detector transducer using an e and b field sensor |
| US5185684A (en) * | 1991-03-28 | 1993-02-09 | Eaton Corporation | Frequency selective arc detection |
| US5224006A (en) * | 1991-09-26 | 1993-06-29 | Westinghouse Electric Corp. | Electronic circuit breaker with protection against sputtering arc faults and ground faults |
| US5280404A (en) * | 1992-05-15 | 1994-01-18 | Bio-Rad Laboratories, Inc. | Arc detection system |
| US5434509A (en) * | 1992-07-30 | 1995-07-18 | Blades; Frederick K. | Method and apparatus for detecting arcing in alternating-current power systems by monitoring high-frequency noise |
| US5223795A (en) * | 1992-07-30 | 1993-06-29 | Blades Frederick K | Method and apparatus for detecting arcing in electrical connections by monitoring high frequency noise |
| US5432455A (en) * | 1992-07-30 | 1995-07-11 | Blades; Frederick K. | Method and apparatus for detecting arcing in alternating current power systems by monitoring high-frequency noise |
| US5459630A (en) * | 1993-09-15 | 1995-10-17 | Eaton Corporation | Self testing circuit breaker ground fault and sputtering arc trip unit |
| US5590012A (en) * | 1995-03-30 | 1996-12-31 | Siemens Energy & Automation, Inc. | Electric arc detector sensor circuit |
| US5600524A (en) * | 1995-05-04 | 1997-02-04 | Leviton Manufacturing Co., Inc. | Intelligent ground fault circuit interrupter |
| US5561505A (en) * | 1995-11-01 | 1996-10-01 | Xerox Corporation | Mechanically sealable liquid charging apparatus |
| US5818237A (en) * | 1996-06-10 | 1998-10-06 | Eaton Corporation | Apparatus for envelope detection of low current arcs |
| US5835321A (en) * | 1996-08-02 | 1998-11-10 | Eaton Corporation | Arc fault detection apparatus and circuit breaker incorporating same |
| US5847913A (en) * | 1997-02-21 | 1998-12-08 | Square D Company | Trip indicators for circuit protection devices |
| US5805397A (en) * | 1997-09-29 | 1998-09-08 | Eaton Corporation | Arcing fault detector with multiple channel sensing and circuit breaker incorporating same |
| US5815352A (en) * | 1997-09-29 | 1998-09-29 | Eaton Corporation | Arc fault detector with limiting of sensed signal to shape response characteristic and circuit breaker incoprorating same |
| US5805398A (en) * | 1997-09-29 | 1998-09-08 | Eaton Corporation | Arc fault detector with immunity to tungsten bulb burnout and circuit breaker incorporating same |
| US6128169A (en) * | 1997-12-19 | 2000-10-03 | Leviton Manufacturing Co., Inc. | Arc fault detector with circuit interrupter and early arc fault detection |
-
1997
- 1997-12-19 US US08/993,745 patent/US6128169A/en not_active Expired - Lifetime
-
1998
- 1998-12-16 CA CA2256243A patent/CA2256243C/en not_active Expired - Lifetime
-
2000
- 2000-10-02 US US09/677,801 patent/US6407893B1/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6313641B1 (en) | 1995-03-13 | 2001-11-06 | Square D Company | Method and system for detecting arcing faults and testing such system |
| US6377427B1 (en) | 1995-03-13 | 2002-04-23 | Square D Company | Arc fault protected electrical receptacle |
| US6532424B1 (en) | 1995-03-13 | 2003-03-11 | Square D Company | Electrical fault detection circuit with dual-mode power supply |
| US6414829B1 (en) | 1998-02-19 | 2002-07-02 | Square D Company | Arc fault circuit interrupter |
| US6456471B1 (en) | 1998-02-19 | 2002-09-24 | Square D Company | Test, reset and communications operations in an ARC fault circuit interrupter with optional memory and/or backup power |
| US6477021B1 (en) | 1998-02-19 | 2002-11-05 | Square D Company | Blocking/inhibiting operation in an arc fault detection system |
| US6567250B1 (en) | 1998-02-19 | 2003-05-20 | Square D Company | Arc fault protected device |
| US6621669B1 (en) | 1998-02-19 | 2003-09-16 | Square D Company | Arc fault receptacle with a feed-through connection |
| US6625550B1 (en) | 1998-02-19 | 2003-09-23 | Square D Company | Arc fault detection for aircraft |
| US6782329B2 (en) | 1998-02-19 | 2004-08-24 | Square D Company | Detection of arcing faults using bifurcated wiring system |
| US6275044B1 (en) | 1998-07-15 | 2001-08-14 | Square D Company | Arcing fault detection system |
Also Published As
| Publication number | Publication date |
|---|---|
| US6407893B1 (en) | 2002-06-18 |
| US6128169A (en) | 2000-10-03 |
| CA2256243C (en) | 2011-10-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2256243A1 (en) | Arc fault detector with circuit interrupter and early arc fault detection | |
| US5963406A (en) | Arc fault detector with circuit interrupter | |
| US7282924B1 (en) | Computerized electricity system having an arc fault detecting sub-system | |
| AU2010300767B2 (en) | System and method for polyphase ground-fault circuit-interrupters | |
| US6639769B2 (en) | Arc fault detector with circuit interrupter | |
| US6014297A (en) | Apparatus for detecting arcing faults and ground faults in multiwire branch electric power circuits | |
| US6195241B1 (en) | Arcing fault detection system | |
| CA2248486C (en) | Apparatus for detecting arcing faults and ground faults in multiwire branch electric power circuits | |
| AU2006303971B2 (en) | A ground-fault circuit-interrupter system for three-phase electrical power systems | |
| US6798628B1 (en) | Arc fault circuit detector having two arc fault detection levels | |
| US7180299B2 (en) | Arc fault detector | |
| US20030156367A1 (en) | Arc fault circuit interrupter with upstream impedance detector | |
| CN102998582A (en) | Detection method of distributing line phase short circuit fault and single phase grounding fault | |
| CA2560791A1 (en) | Arc fault detector | |
| JP3864381B2 (en) | Arc detection in DC electrical systems | |
| CA1185651A (en) | Ground isolation monitoring apparatus having a protective circuit | |
| CN101950945B (en) | Fireproof intelligent circuit breaker for dynamic detection, static detection and zero cutoff | |
| US4796147A (en) | Method for detecting voltage losses in a low voltage distribution system | |
| CN110611313A (en) | Three-phase four-wire AC power frequency intelligent protection safety power supply | |
| CN216215916U (en) | Power consumption protector for three-phase balance immersion electric shock prevention | |
| JP2003294803A (en) | Tester for verifying integrity of insulation of electric circuit wiring | |
| CN201766043U (en) | Dynamic-detection static-detection zero-cutting fireproofing intelligent circuit breaker | |
| KR200218514Y1 (en) | An Apparatus of Preventing Potential Transformer Ferro Resonance in a 154kV Gas Insulated Switchgear Substation | |
| CA2300344C (en) | Apparatus for detecting arcing faults and ground faults in multiwire branch electric power circuits | |
| MXPA98010753A (en) | Arc fault detector with circuit interrupter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20181217 |