Circuit interrupting device having integrated enhanced RFI suppression

• US 7,542,252 B2
• Filed: 06/01/2006
• Issued: 06/02/2009
• Est. Priority Date: 06/01/2005
• Status: Active Grant

• Current Assignee: Leviton Manufacturing Company Incorporated
• Original Assignee: Leviton Manufacturing Company Incorporated
• Inventors: Angelides, Mario, Chan, David Y., Bradley, Roger M., Shafir, Eugene
• Primary Examiner(s): Jackson; Stephen W
• Application Number:
  US11/421,639
• Publication Number:
  US 20060274462A1
• Time in Patent Office: 1,097 Days
• Field of Search: 361/42
• US Class Current: 361/42
• CPC Class Codes: H02H 1/04 Arrangements for preventing response to transient abnormal conditions, e.g. to lightning or to short duration over voltage or oscillations; Damping the influence of dc component by short circuits in ac networks
• CPC Class Codes: H02H 3/335 the main function being self testing of the device

Abstract

A circuit interrupting device such as a GFCI having a network of feed-through capacitors and other passive elements for providing enhanced Radio Frequency Interference (RFI) suppression where the feed-through capacitors and the other passive elements are integrated into a multilayer capacitor chip, also referred to as a Network Capacitor which is located between a differential transformer and at least one input terminal of an operational amplifier on an integrated circuit chip of the GFCI circuit.

Claims

1. A circuit interrupting device comprising:

a housing;

a phase conductive path and a neutral conductive path each disposed at least partially within said housing between a line side and a load side, said phase conductive path terminating at a first connection capable of being electrically connected to a source of electricity, a second connection capable of conducting electricity to at least one load and a third connection capable of conducting electricity to at least one user accessible load, and said neutral conductive path terminating at a first connection capable of being electrically connected to a source of electricity, a second connection capable of providing a neutral connection to said at least one load and a third connection capable of providing a neutral connection to said at least one user accessible load;

a circuit interrupter disposed within said housing and configured to cause electrical discontinuity in said phase and neutral conductive paths between said line side and said load side upon the occurrence of a predetermined condition;

said circuit interrupter further comprising a differential transformer coupled to said phase conductive path and said neutral conductive path;

a multilayer capacitor chip coupled between said differential transformer and at least one input terminal of an integrated chip; and

a reset button disposed at least partially within said housing.

2. The circuit interrupting device of claim 1, wherein said circuit interrupting device is configured to cause electrical discontinuity in at least one of said phase and neutral conductive paths between said line side and said load side before being connected to a source of electricity for use for its intended purpose.

6. The circuit interrupting device of claim 1, wherein said multilayer capacitor chip is coupled to an input terminal of an operational amplifier on said integrated chip.

7. The circuit interrupting device of claim 1, further comprising a reset lockout device that prevents reestablishing electrical continuity in said phase and neutral conductive paths if said circuit interrupter is non-operational, if an open neutral condition exists or if a reverse wiring condition exists.

8. The circuit interrupting device of claim 1, further comprising a latching mechanism to prevent resetting of the circuit interrupter under certain predefined conditions.

24. The circuit interrupting device of claim 1, further comprising a latching mechanism to prevent resetting of the circuit interrupter under certain predefined conditions.

3. A circuit interrupting device comprising:

a housing;

a first electrical conductive path disposed at least partially within said housing and terminating at a first connection, said first connection being capable of electrically connecting to a source of electricity;

a second electrical conductive path disposed at least partially within said housing and terminating at a second connection, said second connection being capable of electrically connecting to at least one load when electrical continuity between said first and second electrical conductive paths is made;

a third electrical conductive path disposed at least partially within said housing and terminating at a third connection, said third connection being capable of electrically connecting to at least one user accessible load when electrical continuity between said first and third electrical conductive paths is made;

a circuit interrupter disposed within said housing and configured to break electrical continuity between said first and second conductive paths and between said first and third conductive paths upon the occurrence of a predetermined condition;

said circuit interrupter further comprising a differential transformer coupled to phase and neutral conductors of said first conductive path;

a multilayer capacitor chip coupled between said differential transformer and at least one input terminal of an integrated chip; and

a reset button disposed at least partially within said housing.

9. The circuit interrupting device of claim 3, wherein said multilayer capacitor chip is coupled to an input terminal of an operational amplifier on said integrated chip.

10. The circuit interrupting device of claim 3, further comprising a reset lockout device that prevents the making of electrical continuity between said first and second conductive paths and between said first and third conductive paths, if said circuit interrupter is non-operational.

11. The circuit interrupting device of claim 3, further comprising a latching mechanism to prevent resetting of the circuit interrupter under certain predefined conditions.

4. A circuit interrupting device comprising:

a housing;

a first electrical conductive path for conducting electricity within said housing, and capable of electrically connecting to a source of electricity;

second electrical conductive path for conducting electricity within said housing, and capable of electrically connecting to at least one load when electrical continuity between said first and second electrical conductive paths is made;

a third electrical conductive path for conducting electricity within said housing, and capable of electrically connecting to at least one user accessible load when electrical continuity between said first and third electrical conductive paths is made;

a circuit interrupter disposed within said housing for breaking electrical continuity between said first and second conductive paths and between said first and third conductive paths, upon the occurrence of a predetermined condition;

said circuit interrupter further comprising a differential transformer coupled to phase and neutral conductors of at least one of said conductive paths;

a multilayer capacitor chip coupled between said differential transformer and at least one input terminal of an integrated chip; and

a reset button disposed at least partially within said housing.

12. The circuit interrupting device of claim 4, wherein said multilayer capacitor chip is coupled to an input terminal of an operational amplifier on said integrated chip.

13. The circuit interrupting device of claim 4, further comprising a reset lockout device that prevents reestablishing electrical continuity between said first and second conductive paths and between said first and third conductive paths if said circuit interrupter is non-operational, if an open neutral condition exists or if a reverse wiring condition exists.

14. The circuit interrupting device of claim 4, further comprising a latching mechanism to prevent resetting of the circuit interrupter under certain predefined conditions.

5. A circuit interrupting system comprising:

a source of power;

a circuit interrupting device having fault protection at both line and load sides of said device, connected to said source of power;

at least one load connected to said circuit interrupting device;

wherein said circuit interrupting device comprises;

a housing;

a phase conductive path and a neutral conductive path each disposed at least partially within said housing between a line side and a load side, said phase conductive path terminating at a first connection capable of being electrically connected to a source of electricity, a second connection capable of conducting electricity to at least one load and a third connection capable of conducting electricity to at least one user accessible load, and said neutral conductive path terminating at a first connection capable of being electrically connected to a source of electricity, a second connection capable of providing a neutral connection to said at least one load and a third connection capable of providing a neutral connection to said at least one user accessible load;

a circuit interrupter disposed within said housing and configured to cause electrical discontinuity in said phase and neutral conductive paths at both said line side and said load side upon the occurrence of a predetermined condition;

said circuit interrupter further comprising a differential transformer coupled to phase and neutral conductive paths;

a multilayer capacitor chip coupled between said differential transformer and at least one input terminal of an integrated chip; and

a reset button disposed at least partially within said housing.

15. The circuit interrupting system of claim 5, wherein said multilayer capacitor chip is coupled to an input terminal of an operational amplifier on said integrated chip.

16. The circuit interrupting system of claim 5, further comprising a reset lockout device that prevents reestablishing electrical continuity in said phase and neutral conductive paths if said circuit interrupting portion is non-operational or if an open neutral condition exists.

17. The circuit interrupting system of claim 5, further comprising a latching mechanism to prevent resetting of the circuit interrupter under certain predefined conditions.

18. A circuit interrupting device comprising:

a housing;

a circuit interrupter disposed within said housing and configured to cause electrical discontinuity in at least one conductive path between a line side and a load side upon the occurrence of a predetermined condition;

a multilayer capacitor chip coupled between a differential transformer and at least one input terminal of an integrated chip; and

a reset button disposed at least partially within said housing.

19. The circuit interrupting device of claim 18, wherein said at least one conductive path includes a phase conductive path and a neutral conductive path each disposed at least partially within said housing between said line side and said load side, said phase conductive path terminating at a first connection capable of being electrically connected to a source of electricity, a second connection capable of conducting electricity to at least one load and a third connection capable of conducting electricity to at least one user accessible load, and said neutral conductive path terminating at a first connection capable of being electrically connected to a source of electricity, a second connection capable of providing a neutral connection to said at least one load and a third connection capable of providing a neutral connection to said at least one user accessible load.

20. The circuit interrupting device of claim 18, wherein said differential transformer is coupled to said phase conductive path and said neutral conductive paths.

21. The circuit interrupting device of claim 18, wherein said circuit interrupting device is configured to cause electrical discontinuity in at least one of said phase and neutral conductive paths between said line side and said load side before being connected to a source of electricity for use for its intended purpose.

22. The circuit interrupting device of claim 18, wherein said multilayer capacitor chip is coupled to an input terminal of an operational amplifier on said integrated chip.

23. The circuit interrupting device of claim 19, further comprising a reset lockout device that prevents reestablishing electrical continuity in said phase and neutral conductive paths if said circuit interrupter is non-operational, if an open neutral condition exists or if a reverse wiring condition exists.

25. A circuit interrupting system comprising:

a source of power;

a circuit interrupting device having fault protection at both line and load sides of said device, connected to said source of power;

at least one load connected to said circuit interrupting device;

wherein said circuit interrupting device comprises;

a housing;

a circuit interrupter disposed within said housing and configured to cause electrical discontinuity in at least one conductive path at at least one of a line side and a load side upon the occurrence of a predetermined condition;

a multilayer capacitor chip coupled between a differential transformer and at least one input terminal of an integrated chip; and

a reset button disposed at least partially within said housing.

26. The circuit interrupting system of claim 25, wherein the at least one conductive path includes a phase conductive path and a neutral conductive path each disposed at least partially within said housing between said line side and said load side, said phase conductive path terminating at a first connection capable of being electrically connected to a source of electricity, a second connection capable of conducting electricity to at least one load and a third connection capable of conducting electricity to at least one user accessible load, and said neutral conductive path terminating at a first connection capable of being electrically connected to a source of electricity, a second connection capable of providing a neutral connection to said at least one load and a third connection capable of providing a neutral connection to said at least one user accessible load.

27. The circuit interrupting system of claim 25, wherein said multilayer capacitor chip is coupled to an input terminal of an operational amplifier on said integrated chip.

28. The circuit interrupting system of claim 26, further comprising a reset lockout device that prevents reestablishing electrical continuity in said phase and neutral conductive paths if said circuit interrupting portion is non-operational or if an open neutral condition exists.

29. The circuit interrupting system of claim 25, further comprising a latching mechanism to prevent resetting of the circuit interrupter under certain predefined conditions.