CA2523516A1 - Circuit interrupting apparatus with remote test and reset activation - Google Patents
Circuit interrupting apparatus with remote test and reset activation Download PDFInfo
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- CA2523516A1 CA2523516A1 CA002523516A CA2523516A CA2523516A1 CA 2523516 A1 CA2523516 A1 CA 2523516A1 CA 002523516 A CA002523516 A CA 002523516A CA 2523516 A CA2523516 A CA 2523516A CA 2523516 A1 CA2523516 A1 CA 2523516A1
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- circuit interrupting
- activating
- reset
- circuitry
- portable
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Classifications
-
- 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
- H02H3/335—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 the main function being self testing of the device
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- 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
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
Abstract
The present disclosure relates to resettable circuit interrupting devices and apparatus capable of being tested and reset from remote locations, and in particular to portable circuit interrupting devices and apparatus capable of being tested and reset from remote locations.
Description
. .:: ~ ~ ~.
CIRCUIT INTERRUPTING APPARATUS
WITH REMOTE TEST AND RESET ACTIVATION
CROSS ~tE~l=FENGE TO RELATED APPLICATIONS
This application is related to and claims priority of U.S. Provisional Patent Application No. 60/619,115, filed October 75, 2004, and entitled "Ground Fault Circuit Interrupter With Remote Test and Reset," which application is incorporated herein in its entirety by reference.
lU BACKGROUND
1. Field The present disclosure relates to resettable circuit interrupting devices and assemblies capable of being tested and reset from remote locations, and include without limitatior;~ ground fault circuit interrupters (GFCI's), arc fault circuit interrupters (AFivl's), immersion detection circuit interrupters (IDCI's), appliance leakage circuit interrupters (AL.CI's), and equipment leakage circuit interrupters (RICI's),
CIRCUIT INTERRUPTING APPARATUS
WITH REMOTE TEST AND RESET ACTIVATION
CROSS ~tE~l=FENGE TO RELATED APPLICATIONS
This application is related to and claims priority of U.S. Provisional Patent Application No. 60/619,115, filed October 75, 2004, and entitled "Ground Fault Circuit Interrupter With Remote Test and Reset," which application is incorporated herein in its entirety by reference.
lU BACKGROUND
1. Field The present disclosure relates to resettable circuit interrupting devices and assemblies capable of being tested and reset from remote locations, and include without limitatior;~ ground fault circuit interrupters (GFCI's), arc fault circuit interrupters (AFivl's), immersion detection circuit interrupters (IDCI's), appliance leakage circuit interrupters (AL.CI's), and equipment leakage circuit interrupters (RICI's),
2, t~escrii~tion of the Related Art Many electrical wiring devices have a line side, which is connectable to an electrical power~supply, and a load side, which is connectable to one or more Iqads and at ieaist one conductive path between the line at~~d Eoad sides, or a cable between the line side and the load side. The etectrical wiring device industry has witnessed an increasing call for circuit breaking devices or systems ~r which are designed to interrupt power to various loads, such as household or industrial appliances, and consumer electrical products. In particular, electrical codes require electrical circuits in home bathrooms and kitchens to be equipped with ground fadlt circuit interrupters (GFCI), for example. Presently available GFGI devices, such as the device described in commonly owned U.S. Pat. No.
4,595,894, use~an electrically activated trip mechanism to mechanically break an electrical connection between the line side and the load side. Such devices are i resettable afterlthey are tripped by, for example, the detection of a ground fault.
In the device discussed in the '894 patent, the trip mechanism used to cause the l0 mechanical breaking of the circuit (i.e., the conductive path between the line and load sides) includes a solenoid (or trip coil). A test button is used to test the trip mechanism and circuitry used tv sense faults, and a reset button is used to reset the electrical connection between line and load sides.
A proposal has been introduced to the National Electric Code (NEC) Section 422.16(B)(4) that would require new and remanufactured vending machines to halve installed at the factory a power cord or cable assembly that includes a ground fault type circuit interrupting device. In a typical environment where a vending machine is located, a cable assembly with a ground fault type circuit interrupting device would be located in the rear of the vending machine and plugged into a wall outlet typically behind the vending machine. To test the ground fault type circuit interrupting device, the vending machine would have to be moved awaj% from the wall to gain access to the circuit interrupting device.
Since vending rioachines are typically heavy and the location of the wall outlet and rear cable assembly make it difficult and inconvenient to perform periodic testing of the ground fault type circuit interrupting device. Moreover, Underwriters' Laboratories (UL) has issued a requirement for periodic and convenient testing of ground fault type circuit interrupting devices.
The present disclosure relates to resettable circuit interrupting devices and apparatus capable of being tested and reset from remote locations, and in particular to portable circuit interrupting devices and apparatus that are capable t0 of being tested sand reset from remote locations. In one embodiment, the portable circuit interru tin a p g pparatus includes a plug assembly, a connector, and a circuit interrupting device located between the plug assembly and connector.
The circuit interrupting device can be connected to the plug assembly and connector by one or more cables, and is configured to change from a reset state to a trip state upon the occurrence of a predetermined condition, such as a ground fault. The circuit interrupting device also includes test circuitry configured to cause the ciraruit interrupting device to change from the reset state to the trip state when activated, and reset circuitry configured to cause the circuit interrupting device to change from the tripped state to the reset state when activated. At least one activating device is provided tv remotely activate the test circuitry o~ the reset circuitry. The activating device may be a wireless device that activates thue test circuitry or the reset circuitry by transmitting a wireless signal to the circuit interrupting device, or the activating device may be hard wired to the circuit interrupting device and activates the test circuitry or the reset circuitry by sending a signal along the hard wire to the circuit interrupting device.
The activating device may be included in the connector or a stand alone device.
In an alternative embodiment, the portable circuit interrupting apparatus includes a plugs assembly, a circuit interrupting device connected to the plug assembly and at least one activating device operatively coupled to the circuit interrupting device. The circuit interrupting device is preferably configured to change from a .reset state to a trip state upon the occurrence of a predetermined condition, such as a ground fault. The circuit interrupting device includes test circuitry config ~ red to cause the circuit interrupting device to change from the i reset state to the trip state when activated, and reset circuitry conftgured to cause the circuit interrupting device to change from the tripped state to the reset state when activated. At least vne activating device is provided to remotely activate the test circuitr)~ or the reset circuitry. The activating device may be a wireless device that activates the test circuitry or the reset circuitry by transmitting a wireless signal .to the circuit interrupting device, or the activating device may be hard wired to tt~e circuit interrupting device and activates the test circuitry or the reset circuitry by sending a signal along the hard wire to the circuit interrupting device.
In another embodiment, the portable circuit interrupting apparatus includes a plug assembly having a circuit interrupting device included in the plug assembly, and at least one activating device capable of remotely activating the test circuitry or reset circuitry.
~J .
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a block diagram of a GFCI with remote test and reset functionality in accordance with an embodiment of the present disclosure;
FIG. 2 i i a diagram of a GFCI with remote test and reset functionality in accordance with another embodiment of the pfesent disclosure;
FIG. 3 is a diagram of a GFCI with remote test and reset functionality in accordance with another embodiment of the present disclosure;
FIG. 4 i i a diagram of a GFCI with remote test and reset functionality in accordance with another embodiment of the present disclosure;
FIG. 5 is a diagram of a GFCI with remote test and reset functionality in accordance with another embodiment of the present disclosure;
FIG. 8 i~ a cross-sectional view of a cable for use with a GFCI with remote test and reset functionality in accordance with an embodiment of the present 1 S d isclosure; and;
FIG. 7 Is~ a cross-sectional view of a cable for use with a GFCI with remote test and reset functionality in accordance with another embodiment of the present disclosure.
DETAILED DESCRIPTION
As not~c~, the present disclosure r~lates to resettable circuit interrupting devices and assemblies capable of being tested and reset from remote locations and in particular' to portable circuit interrupting apparatus capable of being tested and reset from remote locations. The type of circuit interrupting devices contemplated by the present disclosure include without limitation ground fault type circuit interrupting devices, arc fault circuit interrupting devices, immersion detection circuit interrupting devices, appliance leakage circuit interrupting devices, and equipment leakage circuit interrupting devices. However, for ease of description and without departing from the full scope of the family of circuit interrupting devices, the following description will be directed to ground fault circuit interrupting devices. Referring to FIG. 1, a portable circuit interrupting apparatus 10 with remote test and reset functionality in accordance with one i0 embodiment of the present disclosure is provided. The portable circuit interrupting apparatus 10 can be a power curd assembly, a cable assembly or any other portable structure capable of supplying power from a fixed power source to a toad, such as a commercial, industrial or home appliance.
In the erinbodiment of FIG. 1, the circuit interrupting apparatus 10 includes IS a ground fault type circuit interrupting device 12 and activating devices 14, 16 or 18. While FiG.~ 1 illustrates multiple activating devices, one or more of the activating devices 14, 16 ar 18 can be included in the circuit interrupting assembly 10. l~he circuit interrupting device 12 has a line side portion that includes a power cord or cable 20 having a plug assembly for connection to a 20 fixed source of electrical power, e.g,, a wall mounted outlet (not shown), for ~, providing elec:rwal pouter to a Joad. The circuit interrupting device 12 has a icad side that includes a load side power cord or cable 22 with electrical power conductors ending in a connector (e.g., a male or female receptacle, not shown) that connects to an electrical load (not shown), such as a vending machine or other commercial, industrial or home electrical machine. Between the line side and load side of the circuit interrupting device are conductive paths.
Typically, there is a phase conductive path and a neutral conductive path and a ground conductive path. The cable 20 and plug assembly and the connector are standard electrical components for handling electrical power over phase, neutral and ground coinductors. The circuit interrupting device 12 also includes fault sensing circuitry used to monitor the electrical power flowing through the line side phase and neutral conductive paths of cable 20, and a trip mechanism used to 14 change the state of the circuit interrupting device between a reset state and a tripped state. In the reset state there is electrical continuity in the phase and neutral conductive paths between the line side and load side of the circuit interrupting device 12. In the tripped state there is electrical discontinuity in the phase and neutral conductive paths between the line side and load side of the 15 circuit interrupting device 12. When a fault condition is detected by the fault sensing circuitry the trip mechanism causes the circuit interrupting device to change from the reset state to the tripped state. Examples of fault conditions the fault sensing circuitry may detect include ground faults, arc faults, appliance leakage faults, irnrnersion detection faults, or equipment leakage faults. The trip 20 mechanism may utilize electro-mechanical or electrical components or both to change the state of the circuit interruptins device 12. That is, the trip mechanism may use electro-mechanical or electrical components or both to cause electrical discontinuity in !the phase and neutral conductive paths between the line side and ;U
load side of the circuit interrupting device (the tripped state), or the trip mechanism may use electro-mechanical or electrical components or both to cause electricaol continuity in the phase and neutral conductive paths between the line side and laud side of the circuit interrupting device (the reset state) , An example of they fault sensing circuitry and the trip mechanism can be found in commonly owned U.S. Patent No. 4,595,894, which is incorporated herein in its entirety by reference.
The Cifcu.iit interrupting device 12 also includes test circuitry and reset circuitry that can be manually activated by buttons 12a, 12b or remotely activated as will be described below. The test circuitry is used to test all or part of the fault i sensing circuitry, the trip mechanism, or both the fault sensing circuitry and the trip mechanism of the circuit interrupting device 12. The reset circuitry is used to cause the trip rnechanism to return to the reset state, i.e., to re-establish electrical continuity in the phase and neutral conductive paths after the circuit interrupting device 12 has been tested or a fault condition detected. Examples of the test circuitr~~r and the reset circuitry can be found in commonly owned U.S.
('atent No. 4,bJ~,894. It should be noted that the circuit interrupting device may also include reset lockout functionality to prevent the circuit interrupting device from changing ~o the reset state in the event all or part of the fault sensing circuitry, all or part of the trip mechanism or all or part of the test circuitry are inoperative. EXarnples of rESet lockout features are described in cornrnonly owned U.S. Patent No. 6,282,070, which is incorporated herein in its entirety by reference.
~;
For remote activation of the test circuitry or the reset circuitry the circuit interrupting device may be configured for hard wire communications to the one or mare activating devices 14, 1fi or 18 via additional conductors in cable 22.
In addition to or instead of hard wire communication, the circuit interrupting device may include wireless communication circuitry connected to the test circuitry and the reset circuitry. The communication circuitry enables remote activation of all or part of the test circuitry, all or part of the reset circuitry, or all or part of the test and reset circuitry. The wireless communication circuitry contemplated by the present disclosure covers the complete spectnrm of wireless communication circuits including infra-red communication circuitry, radio frequency cornmunicatiori circuitry, or any other technique for wireless communications.
Typically, the communication circuitry includes a receiver for receiving wireless signals and adapter circuitry for adapting the received wireless signal to a form .capable of corrurnunicating with the test circuitry or the reset circuitry.
As noted the test and reset circuitry of the circuit interrupting device 12 can be remotely activated by one or more activating devices 14, 16 or 18. The activating devices 14, 16 or 18 include user accessible buttons (e.g., test and/or reset buttons) to remotely activate the test circuitry or reset circuitry of the circuit interrupting device 12. As noted, various communication techniques may be utilized. For e~eample, as seen in FIG. 1, activating device 16 is hard wired to the circuit interrupting device i2 via ca~!e 22, Activating device 14 uses infra-red (IR) communications and activating device 18 uses radio frequency (RF) communications, Both the activating device 14 and activating device 18 would typically include a transmitter for transmitting a test or rest signal generated when either the test or reset button is activated.
Although three activating devices have been shown it should be understood that the number and type of activating devices can vary depending on the application, Moreover, an activating device can use various communication techniques to activate the test circuitry or reset circuitry of the circuit interrupting device 92, such as, for example, power-line-carrier, twisted pair, fiber optic, light or wave guide, natural or artificial light, magnetic or electrical means or other techniques.
FIG. 2 illustrates another embodiment of a portable circuit intemtpting apparatus 40 with remote test and reset functionality. In the embodiment of FIG.
2, the circuit interrupting device described above is included in a plug assembly 42 capable of connecting to a fixed source of electrical power, e.g., a wall mounted outlet! (not shown), to provide electrical power to a Load. The plug assembly 42 has a power cord or cable 48 ending in a oonneCtor 44 (e.g., a male or female receptacle) for.connection tv an electrical load, such as a vending machine or other commercial, industrial or home electrical machine (not shown).
In this embodiment, plug assembly 42 includes a line side that has prongs for connecting to the fixed source of electrical power and a load side connected to the power conductors in cable 48. Conductive paths are provided between the IIrle side and load side of the plug assetYtbly. The circuit inter~u~tinc~
device is connected betv~een the line side and load side of the plug assembly 42.
As noted, between the line side and load side of the plug assembly 42 are conductive paths. Typically, there is a phase conductive path and a neutral conductive path and a ground conductive path. The circuit interrupting device includes fault sensing circuitry used to monitor the electrical power flowing through the phase and neutral conductive paths on the fine side of the plug assembly 42, and a trip mechanism used to change the state of the circuit interrupting device between a reset state and a tripped state. In the reset state there is electrical continuity in the phase and neutral conductive paths between the line side aryd load side of the plug assembly 42. In the tripped state there is electrical discontinuity in the phase and neutral conductive paths between the lime side and (vad side of the plug assembly 42. When a fault condition is detected by the fault sensing circuitry the trip mechanism causes the circuit interrupting device to change from the reset state to the tripped state.
Examples of the fault conditions the fault sensing circuitry may detect include ground faults, i5 arc faults, appliance leakage faults, immersion detection faults, or equipment leakage faults. ~ The trip mechanism may include electro-mechanical or electrical components orj both to change the state of the arcuit interrupting device.
That is, i the trip mechanism may use electro-mechanical or electrical components or both to cause electrical discontinuity in the phase and neutral conductive paths between the line side and load side of the circuit interrupting device (the tripped state), or the trip mechanism may use electro-mechanical or electrical components or~ both to cause electrical continuity in the phase and neutral It conductive paths between the line side and load side of the circuit interrupting device (the reset state) , The circuit interrupting device also includes test circuitry and reset circuitry that can be manually activated by buttons 42a, 42b or remotely activated as will be described below. The test circuitry is used to test all or part of the fault sensing circuitry, the trip mechanism or bath the fault sensing circuitry and trip mechanism of~the circuit interrupting device. The reset circuitry is to cause the trip~mechanism to return to the reset state, i.e., to re-establish electrical continuity in the phase aid neutral conductive paths, after the circuit interrupting device has been tested or'a fault condition detected. Examples of the test circuitry and reset circuitry can be found in commonly owned U.S. Patent No. 4,595,894. It should be noted that the circuit interrupting device may also include reset lockout functionality to.prevent the circuit interrupting device from changing to the reset state in the event all or part of the fault sensing circuitry, all or part of the trip IS mechanism or all or part of the test circuitry are inoperative. Examples of reset lockout feature's are described in commonly owned U.S. Patent No. 6,282,070.
In the embodiment of FIG. 2, the connector 44 includes activating device 46 having test and reset buttons 46a, 46b which can be used to remotely activate all or part of the test circuitry, all or part of the reset circuitry or all or part of both.
The cable 48 includes power conductors and signal conductors. The power eand~etors e~e!iver electrical power from the plug asscrnbty 42 to tloe connector 44. At the plug' assembly 42, the signal conductors are connected to the test circuitry and resEt circuitry, and at the connector 4A the signal conductors are ~i connected to test and reset buttons 46a, 46b on activating device 46. T'he signal conductors are used by the activating device 46 to communicate with and remotely activate all or part of the test circuitry, all or part of the reset circuitry or all or part of both.
FIG. 3 illustrates another embodiment of a portable circuit interrupting apparatus 50 v~ith remote test and reset functionality. In this embodiment, the plug assembly 52 is substantially similar to plug assembly 42 and for clarity will not be described further. The remote activation of the test or reset circuitry in the circuit interrupting device is provided by an inline activating device 56 disposed between the plug assembly 52 and connector 54. The activating device 56 includes test and reset buttons 56a, 56b which can be used to remotely activate all or part of the test circuitry, all or part of the reset circuitry or all or part of both.
The plug assembly 52 is connected to the activating device 56 via cable 58 and connector 54 is connected to the activating device via cable 59. Cable 58 has power conductors and signal conductors. Cable 59 has power conductors. The power conductors deliver power from the plug assembly 52 to the connector 54.
The signal conductors in cable 58 are used by the activating device 56 to communicate Nrith and remotely activate all or part of the test circuitry, all or part of the reset circuitry or all or part of both.
FiG. 4 illustrates another embodiment of a portable Circuit interrupting apparatus 60 vuith remote test and reset functionality. In this embodiment, the plug assembly 62 is substantially similar to plug assembly 42 described above and for clarity v~~ill not be described further, and the remote test and reset l ~I
functionality is provided by activating device 66. The activating device 66 includES test and reset buttons 66a, 66b which can be used to remotely activate all or part of the test circuitry, all or part of the reset circuitry or ail or part of both.
'The activating device maybe free standing or may be fixed to, for example, a wall via eyelets 74. In this embodiment, the plug assembly 62 is connected to a first port of a splitter 76 via cable 68. Cable 68 has power conductors and signal conductors. A cable 70 having power conductors is connected between the connector 64 a d a second port of the splitter 76. A third port of splitter 76 is connected to the activating device 66 via cable 72. Cable 72 has signal conductors. Tile power conductors deliver electrical power from the plug assembly 62 to the connector 64. The signs! conductors in cable 68 and 72 are used by the activating device fib to communicate with and remotely activate all or part of the test circuitry, ail or part of the reset circuitry or all or part of both in the circuit interrupting device.
F1G. 5 illustrates another embodiment of a portable circuit interrupting apparatus 80 with remote test and reset functionality. In this embodiment, the remote test and' reset functionality is provided by activating device 84 connected to the load side of circuit interrupting device 82 through cable 90. The line side of the circuit interrupting device is connected via cable 88 to a plug assembly 86.
The plug assembly 86 is used to connect the circuit interrupting assembly 82 to a fixed source ef electrical power, e.g., a wall mounted outlet (nvt shown), to provide electrical power to a load (not shown), such as a vending machine or other commercial, industrial or home electrical machine. The circuit interrupting device is substantially similar to the circuit interrupting device 12 described above and for clarity will not be described further.
The activating device 84 includes test and reset buttons 84a, 84b which can be used to remotely activatE all or part of the test circuitry, ail or part of the reset circuitry or all or part of both. The activating device 84 may be configured as a panel capable of being mounted to a surtace of an object, such as wall or a machine.
As noted, the load side of the circuit interrupting device 82 is connected to the activating device 84 via cable 90. Cable 90 includes power conductors (Phase (L), Neutral (N) and Ground (G)) and signal conductors (T1, T2, (~1, R2).
i The power conductors provide power to a load, the signal conductors T1, T2 are connected to tf a test button 84a, and the signal conductors R1, 1~2 are i connected to reset button 84b.
FIG. G is. a cross-sectional view of a cable 100 that may be used with the various embodiments of a portable circuit interrupting apparatus. The cable includes an outer sheathing 102 having three power conductors 106 and three pairs of signal conductors 104. The power conductors 106 are used to carry I
electrical power over standard power lines (Phase, Neutral and Ground). Each pair of the signal conductors 104 is used to carry or handle signals between an activating device (e.g., activating device 16 of FIG. 9, activating device 46 of FiG.
2 aetivateng device 58 of FIG. 3, activating device 66 of FIG. 4, or aetivatind device 84 of FIG. 5) and a circuit interrupting device or plug assembly.
FIG. 7 is a cross-sectional view of another embodiment of a cable that may be used with the various embodiments of a portable circuit interrupting apparatus. In this embodiment, the cable 120 has two components, a power cable 122 and a signal cable 128. The power cable 122 has three power conductors 124 used to carry electrical power. The signal cable 128 has two pairs of signal conductors 130. Each pair of the signal conductors 13Q is used to carry or handle signals between an activating device and a circuit interrupting device or plug assembly. Preferably, the power cable 122 is coupled to but electrically isolated from the signal cable 130.
The circaait interrupting devices, plug assemblies and the activating devices descrit~ed above rnay include an audio indicator (e.g., buzzer), a visual indicator (e.g., light emitting diodes) or both as indicator means to provide users with an indication of the status of the circuit interrupting device.
While there have been shown and described various features and embodiment ofva portable circuit interrupting assembly, it will be understood that various omissions and substitutions and changes of the form and details of the devices illustraf~ed and in their operation rr~ay be made by those skilled in the art without departing from the spirit of the subject matter of the present disclosure.
4,595,894, use~an electrically activated trip mechanism to mechanically break an electrical connection between the line side and the load side. Such devices are i resettable afterlthey are tripped by, for example, the detection of a ground fault.
In the device discussed in the '894 patent, the trip mechanism used to cause the l0 mechanical breaking of the circuit (i.e., the conductive path between the line and load sides) includes a solenoid (or trip coil). A test button is used to test the trip mechanism and circuitry used tv sense faults, and a reset button is used to reset the electrical connection between line and load sides.
A proposal has been introduced to the National Electric Code (NEC) Section 422.16(B)(4) that would require new and remanufactured vending machines to halve installed at the factory a power cord or cable assembly that includes a ground fault type circuit interrupting device. In a typical environment where a vending machine is located, a cable assembly with a ground fault type circuit interrupting device would be located in the rear of the vending machine and plugged into a wall outlet typically behind the vending machine. To test the ground fault type circuit interrupting device, the vending machine would have to be moved awaj% from the wall to gain access to the circuit interrupting device.
Since vending rioachines are typically heavy and the location of the wall outlet and rear cable assembly make it difficult and inconvenient to perform periodic testing of the ground fault type circuit interrupting device. Moreover, Underwriters' Laboratories (UL) has issued a requirement for periodic and convenient testing of ground fault type circuit interrupting devices.
The present disclosure relates to resettable circuit interrupting devices and apparatus capable of being tested and reset from remote locations, and in particular to portable circuit interrupting devices and apparatus that are capable t0 of being tested sand reset from remote locations. In one embodiment, the portable circuit interru tin a p g pparatus includes a plug assembly, a connector, and a circuit interrupting device located between the plug assembly and connector.
The circuit interrupting device can be connected to the plug assembly and connector by one or more cables, and is configured to change from a reset state to a trip state upon the occurrence of a predetermined condition, such as a ground fault. The circuit interrupting device also includes test circuitry configured to cause the ciraruit interrupting device to change from the reset state to the trip state when activated, and reset circuitry configured to cause the circuit interrupting device to change from the tripped state to the reset state when activated. At least one activating device is provided tv remotely activate the test circuitry o~ the reset circuitry. The activating device may be a wireless device that activates thue test circuitry or the reset circuitry by transmitting a wireless signal to the circuit interrupting device, or the activating device may be hard wired to the circuit interrupting device and activates the test circuitry or the reset circuitry by sending a signal along the hard wire to the circuit interrupting device.
The activating device may be included in the connector or a stand alone device.
In an alternative embodiment, the portable circuit interrupting apparatus includes a plugs assembly, a circuit interrupting device connected to the plug assembly and at least one activating device operatively coupled to the circuit interrupting device. The circuit interrupting device is preferably configured to change from a .reset state to a trip state upon the occurrence of a predetermined condition, such as a ground fault. The circuit interrupting device includes test circuitry config ~ red to cause the circuit interrupting device to change from the i reset state to the trip state when activated, and reset circuitry conftgured to cause the circuit interrupting device to change from the tripped state to the reset state when activated. At least vne activating device is provided to remotely activate the test circuitr)~ or the reset circuitry. The activating device may be a wireless device that activates the test circuitry or the reset circuitry by transmitting a wireless signal .to the circuit interrupting device, or the activating device may be hard wired to tt~e circuit interrupting device and activates the test circuitry or the reset circuitry by sending a signal along the hard wire to the circuit interrupting device.
In another embodiment, the portable circuit interrupting apparatus includes a plug assembly having a circuit interrupting device included in the plug assembly, and at least one activating device capable of remotely activating the test circuitry or reset circuitry.
~J .
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a block diagram of a GFCI with remote test and reset functionality in accordance with an embodiment of the present disclosure;
FIG. 2 i i a diagram of a GFCI with remote test and reset functionality in accordance with another embodiment of the pfesent disclosure;
FIG. 3 is a diagram of a GFCI with remote test and reset functionality in accordance with another embodiment of the present disclosure;
FIG. 4 i i a diagram of a GFCI with remote test and reset functionality in accordance with another embodiment of the present disclosure;
FIG. 5 is a diagram of a GFCI with remote test and reset functionality in accordance with another embodiment of the present disclosure;
FIG. 8 i~ a cross-sectional view of a cable for use with a GFCI with remote test and reset functionality in accordance with an embodiment of the present 1 S d isclosure; and;
FIG. 7 Is~ a cross-sectional view of a cable for use with a GFCI with remote test and reset functionality in accordance with another embodiment of the present disclosure.
DETAILED DESCRIPTION
As not~c~, the present disclosure r~lates to resettable circuit interrupting devices and assemblies capable of being tested and reset from remote locations and in particular' to portable circuit interrupting apparatus capable of being tested and reset from remote locations. The type of circuit interrupting devices contemplated by the present disclosure include without limitation ground fault type circuit interrupting devices, arc fault circuit interrupting devices, immersion detection circuit interrupting devices, appliance leakage circuit interrupting devices, and equipment leakage circuit interrupting devices. However, for ease of description and without departing from the full scope of the family of circuit interrupting devices, the following description will be directed to ground fault circuit interrupting devices. Referring to FIG. 1, a portable circuit interrupting apparatus 10 with remote test and reset functionality in accordance with one i0 embodiment of the present disclosure is provided. The portable circuit interrupting apparatus 10 can be a power curd assembly, a cable assembly or any other portable structure capable of supplying power from a fixed power source to a toad, such as a commercial, industrial or home appliance.
In the erinbodiment of FIG. 1, the circuit interrupting apparatus 10 includes IS a ground fault type circuit interrupting device 12 and activating devices 14, 16 or 18. While FiG.~ 1 illustrates multiple activating devices, one or more of the activating devices 14, 16 ar 18 can be included in the circuit interrupting assembly 10. l~he circuit interrupting device 12 has a line side portion that includes a power cord or cable 20 having a plug assembly for connection to a 20 fixed source of electrical power, e.g,, a wall mounted outlet (not shown), for ~, providing elec:rwal pouter to a Joad. The circuit interrupting device 12 has a icad side that includes a load side power cord or cable 22 with electrical power conductors ending in a connector (e.g., a male or female receptacle, not shown) that connects to an electrical load (not shown), such as a vending machine or other commercial, industrial or home electrical machine. Between the line side and load side of the circuit interrupting device are conductive paths.
Typically, there is a phase conductive path and a neutral conductive path and a ground conductive path. The cable 20 and plug assembly and the connector are standard electrical components for handling electrical power over phase, neutral and ground coinductors. The circuit interrupting device 12 also includes fault sensing circuitry used to monitor the electrical power flowing through the line side phase and neutral conductive paths of cable 20, and a trip mechanism used to 14 change the state of the circuit interrupting device between a reset state and a tripped state. In the reset state there is electrical continuity in the phase and neutral conductive paths between the line side and load side of the circuit interrupting device 12. In the tripped state there is electrical discontinuity in the phase and neutral conductive paths between the line side and load side of the 15 circuit interrupting device 12. When a fault condition is detected by the fault sensing circuitry the trip mechanism causes the circuit interrupting device to change from the reset state to the tripped state. Examples of fault conditions the fault sensing circuitry may detect include ground faults, arc faults, appliance leakage faults, irnrnersion detection faults, or equipment leakage faults. The trip 20 mechanism may utilize electro-mechanical or electrical components or both to change the state of the circuit interruptins device 12. That is, the trip mechanism may use electro-mechanical or electrical components or both to cause electrical discontinuity in !the phase and neutral conductive paths between the line side and ;U
load side of the circuit interrupting device (the tripped state), or the trip mechanism may use electro-mechanical or electrical components or both to cause electricaol continuity in the phase and neutral conductive paths between the line side and laud side of the circuit interrupting device (the reset state) , An example of they fault sensing circuitry and the trip mechanism can be found in commonly owned U.S. Patent No. 4,595,894, which is incorporated herein in its entirety by reference.
The Cifcu.iit interrupting device 12 also includes test circuitry and reset circuitry that can be manually activated by buttons 12a, 12b or remotely activated as will be described below. The test circuitry is used to test all or part of the fault i sensing circuitry, the trip mechanism, or both the fault sensing circuitry and the trip mechanism of the circuit interrupting device 12. The reset circuitry is used to cause the trip rnechanism to return to the reset state, i.e., to re-establish electrical continuity in the phase and neutral conductive paths after the circuit interrupting device 12 has been tested or a fault condition detected. Examples of the test circuitr~~r and the reset circuitry can be found in commonly owned U.S.
('atent No. 4,bJ~,894. It should be noted that the circuit interrupting device may also include reset lockout functionality to prevent the circuit interrupting device from changing ~o the reset state in the event all or part of the fault sensing circuitry, all or part of the trip mechanism or all or part of the test circuitry are inoperative. EXarnples of rESet lockout features are described in cornrnonly owned U.S. Patent No. 6,282,070, which is incorporated herein in its entirety by reference.
~;
For remote activation of the test circuitry or the reset circuitry the circuit interrupting device may be configured for hard wire communications to the one or mare activating devices 14, 1fi or 18 via additional conductors in cable 22.
In addition to or instead of hard wire communication, the circuit interrupting device may include wireless communication circuitry connected to the test circuitry and the reset circuitry. The communication circuitry enables remote activation of all or part of the test circuitry, all or part of the reset circuitry, or all or part of the test and reset circuitry. The wireless communication circuitry contemplated by the present disclosure covers the complete spectnrm of wireless communication circuits including infra-red communication circuitry, radio frequency cornmunicatiori circuitry, or any other technique for wireless communications.
Typically, the communication circuitry includes a receiver for receiving wireless signals and adapter circuitry for adapting the received wireless signal to a form .capable of corrurnunicating with the test circuitry or the reset circuitry.
As noted the test and reset circuitry of the circuit interrupting device 12 can be remotely activated by one or more activating devices 14, 16 or 18. The activating devices 14, 16 or 18 include user accessible buttons (e.g., test and/or reset buttons) to remotely activate the test circuitry or reset circuitry of the circuit interrupting device 12. As noted, various communication techniques may be utilized. For e~eample, as seen in FIG. 1, activating device 16 is hard wired to the circuit interrupting device i2 via ca~!e 22, Activating device 14 uses infra-red (IR) communications and activating device 18 uses radio frequency (RF) communications, Both the activating device 14 and activating device 18 would typically include a transmitter for transmitting a test or rest signal generated when either the test or reset button is activated.
Although three activating devices have been shown it should be understood that the number and type of activating devices can vary depending on the application, Moreover, an activating device can use various communication techniques to activate the test circuitry or reset circuitry of the circuit interrupting device 92, such as, for example, power-line-carrier, twisted pair, fiber optic, light or wave guide, natural or artificial light, magnetic or electrical means or other techniques.
FIG. 2 illustrates another embodiment of a portable circuit intemtpting apparatus 40 with remote test and reset functionality. In the embodiment of FIG.
2, the circuit interrupting device described above is included in a plug assembly 42 capable of connecting to a fixed source of electrical power, e.g., a wall mounted outlet! (not shown), to provide electrical power to a Load. The plug assembly 42 has a power cord or cable 48 ending in a oonneCtor 44 (e.g., a male or female receptacle) for.connection tv an electrical load, such as a vending machine or other commercial, industrial or home electrical machine (not shown).
In this embodiment, plug assembly 42 includes a line side that has prongs for connecting to the fixed source of electrical power and a load side connected to the power conductors in cable 48. Conductive paths are provided between the IIrle side and load side of the plug assetYtbly. The circuit inter~u~tinc~
device is connected betv~een the line side and load side of the plug assembly 42.
As noted, between the line side and load side of the plug assembly 42 are conductive paths. Typically, there is a phase conductive path and a neutral conductive path and a ground conductive path. The circuit interrupting device includes fault sensing circuitry used to monitor the electrical power flowing through the phase and neutral conductive paths on the fine side of the plug assembly 42, and a trip mechanism used to change the state of the circuit interrupting device between a reset state and a tripped state. In the reset state there is electrical continuity in the phase and neutral conductive paths between the line side aryd load side of the plug assembly 42. In the tripped state there is electrical discontinuity in the phase and neutral conductive paths between the lime side and (vad side of the plug assembly 42. When a fault condition is detected by the fault sensing circuitry the trip mechanism causes the circuit interrupting device to change from the reset state to the tripped state.
Examples of the fault conditions the fault sensing circuitry may detect include ground faults, i5 arc faults, appliance leakage faults, immersion detection faults, or equipment leakage faults. ~ The trip mechanism may include electro-mechanical or electrical components orj both to change the state of the arcuit interrupting device.
That is, i the trip mechanism may use electro-mechanical or electrical components or both to cause electrical discontinuity in the phase and neutral conductive paths between the line side and load side of the circuit interrupting device (the tripped state), or the trip mechanism may use electro-mechanical or electrical components or~ both to cause electrical continuity in the phase and neutral It conductive paths between the line side and load side of the circuit interrupting device (the reset state) , The circuit interrupting device also includes test circuitry and reset circuitry that can be manually activated by buttons 42a, 42b or remotely activated as will be described below. The test circuitry is used to test all or part of the fault sensing circuitry, the trip mechanism or bath the fault sensing circuitry and trip mechanism of~the circuit interrupting device. The reset circuitry is to cause the trip~mechanism to return to the reset state, i.e., to re-establish electrical continuity in the phase aid neutral conductive paths, after the circuit interrupting device has been tested or'a fault condition detected. Examples of the test circuitry and reset circuitry can be found in commonly owned U.S. Patent No. 4,595,894. It should be noted that the circuit interrupting device may also include reset lockout functionality to.prevent the circuit interrupting device from changing to the reset state in the event all or part of the fault sensing circuitry, all or part of the trip IS mechanism or all or part of the test circuitry are inoperative. Examples of reset lockout feature's are described in commonly owned U.S. Patent No. 6,282,070.
In the embodiment of FIG. 2, the connector 44 includes activating device 46 having test and reset buttons 46a, 46b which can be used to remotely activate all or part of the test circuitry, all or part of the reset circuitry or all or part of both.
The cable 48 includes power conductors and signal conductors. The power eand~etors e~e!iver electrical power from the plug asscrnbty 42 to tloe connector 44. At the plug' assembly 42, the signal conductors are connected to the test circuitry and resEt circuitry, and at the connector 4A the signal conductors are ~i connected to test and reset buttons 46a, 46b on activating device 46. T'he signal conductors are used by the activating device 46 to communicate with and remotely activate all or part of the test circuitry, all or part of the reset circuitry or all or part of both.
FIG. 3 illustrates another embodiment of a portable circuit interrupting apparatus 50 v~ith remote test and reset functionality. In this embodiment, the plug assembly 52 is substantially similar to plug assembly 42 and for clarity will not be described further. The remote activation of the test or reset circuitry in the circuit interrupting device is provided by an inline activating device 56 disposed between the plug assembly 52 and connector 54. The activating device 56 includes test and reset buttons 56a, 56b which can be used to remotely activate all or part of the test circuitry, all or part of the reset circuitry or all or part of both.
The plug assembly 52 is connected to the activating device 56 via cable 58 and connector 54 is connected to the activating device via cable 59. Cable 58 has power conductors and signal conductors. Cable 59 has power conductors. The power conductors deliver power from the plug assembly 52 to the connector 54.
The signal conductors in cable 58 are used by the activating device 56 to communicate Nrith and remotely activate all or part of the test circuitry, all or part of the reset circuitry or all or part of both.
FiG. 4 illustrates another embodiment of a portable Circuit interrupting apparatus 60 vuith remote test and reset functionality. In this embodiment, the plug assembly 62 is substantially similar to plug assembly 42 described above and for clarity v~~ill not be described further, and the remote test and reset l ~I
functionality is provided by activating device 66. The activating device 66 includES test and reset buttons 66a, 66b which can be used to remotely activate all or part of the test circuitry, all or part of the reset circuitry or ail or part of both.
'The activating device maybe free standing or may be fixed to, for example, a wall via eyelets 74. In this embodiment, the plug assembly 62 is connected to a first port of a splitter 76 via cable 68. Cable 68 has power conductors and signal conductors. A cable 70 having power conductors is connected between the connector 64 a d a second port of the splitter 76. A third port of splitter 76 is connected to the activating device 66 via cable 72. Cable 72 has signal conductors. Tile power conductors deliver electrical power from the plug assembly 62 to the connector 64. The signs! conductors in cable 68 and 72 are used by the activating device fib to communicate with and remotely activate all or part of the test circuitry, ail or part of the reset circuitry or all or part of both in the circuit interrupting device.
F1G. 5 illustrates another embodiment of a portable circuit interrupting apparatus 80 with remote test and reset functionality. In this embodiment, the remote test and' reset functionality is provided by activating device 84 connected to the load side of circuit interrupting device 82 through cable 90. The line side of the circuit interrupting device is connected via cable 88 to a plug assembly 86.
The plug assembly 86 is used to connect the circuit interrupting assembly 82 to a fixed source ef electrical power, e.g., a wall mounted outlet (nvt shown), to provide electrical power to a load (not shown), such as a vending machine or other commercial, industrial or home electrical machine. The circuit interrupting device is substantially similar to the circuit interrupting device 12 described above and for clarity will not be described further.
The activating device 84 includes test and reset buttons 84a, 84b which can be used to remotely activatE all or part of the test circuitry, ail or part of the reset circuitry or all or part of both. The activating device 84 may be configured as a panel capable of being mounted to a surtace of an object, such as wall or a machine.
As noted, the load side of the circuit interrupting device 82 is connected to the activating device 84 via cable 90. Cable 90 includes power conductors (Phase (L), Neutral (N) and Ground (G)) and signal conductors (T1, T2, (~1, R2).
i The power conductors provide power to a load, the signal conductors T1, T2 are connected to tf a test button 84a, and the signal conductors R1, 1~2 are i connected to reset button 84b.
FIG. G is. a cross-sectional view of a cable 100 that may be used with the various embodiments of a portable circuit interrupting apparatus. The cable includes an outer sheathing 102 having three power conductors 106 and three pairs of signal conductors 104. The power conductors 106 are used to carry I
electrical power over standard power lines (Phase, Neutral and Ground). Each pair of the signal conductors 104 is used to carry or handle signals between an activating device (e.g., activating device 16 of FIG. 9, activating device 46 of FiG.
2 aetivateng device 58 of FIG. 3, activating device 66 of FIG. 4, or aetivatind device 84 of FIG. 5) and a circuit interrupting device or plug assembly.
FIG. 7 is a cross-sectional view of another embodiment of a cable that may be used with the various embodiments of a portable circuit interrupting apparatus. In this embodiment, the cable 120 has two components, a power cable 122 and a signal cable 128. The power cable 122 has three power conductors 124 used to carry electrical power. The signal cable 128 has two pairs of signal conductors 130. Each pair of the signal conductors 13Q is used to carry or handle signals between an activating device and a circuit interrupting device or plug assembly. Preferably, the power cable 122 is coupled to but electrically isolated from the signal cable 130.
The circaait interrupting devices, plug assemblies and the activating devices descrit~ed above rnay include an audio indicator (e.g., buzzer), a visual indicator (e.g., light emitting diodes) or both as indicator means to provide users with an indication of the status of the circuit interrupting device.
While there have been shown and described various features and embodiment ofva portable circuit interrupting assembly, it will be understood that various omissions and substitutions and changes of the form and details of the devices illustraf~ed and in their operation rr~ay be made by those skilled in the art without departing from the spirit of the subject matter of the present disclosure.
Claims (21)
1. A portable circuit interrupting apparatus comprising:
a plug;
a connector;
a circuit interrupting device connected between the plug and connector, the circuit interrupting device being configured to change from a reset state to a trip state upon the occurrence of a predetermined condition, the circuit interrupting device including test circuitry configured to cause the circuit interrupting device to change from the reset state to the trip state when activated, and reset circuitry configured to cause the circuit interrupting device to change from the tripped state to the reset state when activated; and at least one activating device capable of remotely activating the test circuitry or the reset circuitry.
a plug;
a connector;
a circuit interrupting device connected between the plug and connector, the circuit interrupting device being configured to change from a reset state to a trip state upon the occurrence of a predetermined condition, the circuit interrupting device including test circuitry configured to cause the circuit interrupting device to change from the reset state to the trip state when activated, and reset circuitry configured to cause the circuit interrupting device to change from the tripped state to the reset state when activated; and at least one activating device capable of remotely activating the test circuitry or the reset circuitry.
2. The portable circuit interrupting apparatus according to claim 1, wherein circuit interrupting device is connected to the plug by a cable and to the connector by a cable.
3. The portable circuit interrupting apparatus according to claim 1, wherein the at least one activating device comprises a wireless activating device that activates the test circuitry or the reset circuitry by transmitting a wireless signal to the circuit interrupting device.
4. The portable circuit interrupting apparatus according to claim 1, wherein the at least one activating device comprises an activating device hard wired to the circuit interrupting device that activates the test circuitry or the reset circuitry by sending a signal along the hard wire to the circuit interrupting device.
5. The portable circuit interrupting apparatus according to claim 1, wherein the at least one activating device comprises two activating devices, wherein one activating device is hard wired to the circuit interrupting device and activates the test circuitry or the reset circuitry by sending a signal along the hard wire to the circuit interrupting device, and wherein the other activating device is a wireless activating device that activates the test circuitry or the reset circuitry by transmitting a wireless signal to the circuit interrupting device.
6. A portable circuit interrupting apparatus comprising:
a plug;
a circuit interrupting device connected to the plug and configured to change from a reset state to a trip state upon the occurrence of a predetermined condition, the circuit interrupting device including test circuitry configured to cause the circuit interrupting device to change from the reset state to the trip state when activated, and reset circuitry configured to cause the circuit interrupting device to change from the tripped state to the reset state when activated; and at least one activating device operatively coupled to the circuit interrupting device and capable of remotely activating the test circuitry or the reset circuitry.
a plug;
a circuit interrupting device connected to the plug and configured to change from a reset state to a trip state upon the occurrence of a predetermined condition, the circuit interrupting device including test circuitry configured to cause the circuit interrupting device to change from the reset state to the trip state when activated, and reset circuitry configured to cause the circuit interrupting device to change from the tripped state to the reset state when activated; and at least one activating device operatively coupled to the circuit interrupting device and capable of remotely activating the test circuitry or the reset circuitry.
7. The portable circuit interrupting apparatus according to claim 6, wherein the at least one activating device is operatively coupled to the circuit interrupting device by wireless communications.
8. The portable circuit interrupting apparatus according to claim 7, wherein the activating device activates the test circuitry or tile reset circuitry by transmitting a wireless signal to the circuit interrupting device.
9. the portable circuit interrupting apparatus according to claim 6, wherein the at least one activating device is operatively coupled to the circuit interrupting device by hard wire.
10. The portable circuit interrupting apparatus according to claim 9, wherein the at least one activating device activates the test circuitry or the reset circuitry by sending a signal along the hard wire to the circuit interrupting device.
11. The portable circuit interrupting apparatus according to claim 6, wherein the at least one activating device comprises two activating devices, wherein one activating device is operatively coupled to the circuit interrupting device by hard wire and activates the test circuitry or the reset circuitry by sending a signal along the hard wire to the circuit interrupting device, and wherein the other activating device is operatively coupled to the circuit interrupting device by wireless communications and activates the test circuitry or the reset circuitry by transmitting a wireless signal to the circuit interrupting device.
12. A portable circuit interrupting apparatus comprising:
a plug having a circuit interrupting device configured to change from a reset state to a trip state upon the occurrence of a predetermined condition, the circuit interrupting device including test circuitry configured to cause the circuit interrupting device to change from the reset state to the trip state when activated, and reset circuitry configured to cause the circuit interrupting device to change from the tripped state to the reset state when activated; and at least one activating device capable of remotely activating the test circuitry or reset circuitry.
a plug having a circuit interrupting device configured to change from a reset state to a trip state upon the occurrence of a predetermined condition, the circuit interrupting device including test circuitry configured to cause the circuit interrupting device to change from the reset state to the trip state when activated, and reset circuitry configured to cause the circuit interrupting device to change from the tripped state to the reset state when activated; and at least one activating device capable of remotely activating the test circuitry or reset circuitry.
13. The portable circuit interrupting apparatus according to claim 12, further comprising a connector connected to the plug by a cable.
14. The portable circuit interrupting apparatus according to claim 13, wherein the at least one activating device is locating in the connector.
15. The portable circuit interrupting apparatus according to claim 12, wherein the at least one activating device comprises a wireless activating device that activates the test circuitry or the reset circuitry by transmitting a wireless signal to the circuit interrupting device.
16. The portable circuit interrupting apparatus according to claim 12, wherein the at least one activating device comprises an activating device hard wired to the circuit interrupting device that activates the test circuitry or the reset circuitry by sending a signal along the hard wire to the circuit interrupting device.
17. The portable circuit interrupting apparatus according to claim 12, wherein the at least one activating device comprises two activating devices, wherein one activating device is hard wired to the circuit interrupting device and activates the test circuitry or the reset circuitry by sending a signal along the hard wire to the circuit interrupting device, and wherein the other activating device is a wireless activating device that activates the test circuitry or the reset circuitry by transmitting a wireless signal to the circuit interrupting device.
18. A portable circuit interrupting apparatus comprising:
plug means for connecting to a source of electrical power;
connector means for providing electrical power to a load;
circuit interrupting means connected between the plug means and the connector means, and having at least two states, a reset state permitting electrical power from the plug means to flow to the connector means, and a tripped state preventing electrical power from the plug means to flow to the connector means upon the occurrence of a predetermined condition, the circuit interrupting means including test circuitry configured to cause the circuit interrupting means to change from the reset state to the trip state when activated, and reset circuitry configured to cause the circuit interrupting means to change from the tripped state to the reset state when activated; and activating means for remotely activating the test circuitry or the reset circuitry.
plug means for connecting to a source of electrical power;
connector means for providing electrical power to a load;
circuit interrupting means connected between the plug means and the connector means, and having at least two states, a reset state permitting electrical power from the plug means to flow to the connector means, and a tripped state preventing electrical power from the plug means to flow to the connector means upon the occurrence of a predetermined condition, the circuit interrupting means including test circuitry configured to cause the circuit interrupting means to change from the reset state to the trip state when activated, and reset circuitry configured to cause the circuit interrupting means to change from the tripped state to the reset state when activated; and activating means for remotely activating the test circuitry or the reset circuitry.
19. The portable circuit interrupting apparatus according to claim 18, wherein the activating means comprises a wireless activating device that activates the test circuitry or the reset circuitry by transmitting a wireless signal to the circuit interrupting means.
20. The portable circuit interrupting apparatus according to claim 18, wherein the activating means comprises an activating device hard wired to the circuit interrupting device that activates the test circuitry or the reset circuitry by sending a signal along the hard Wire to the circuit interrupting means.
21. The portable circuit interrupting apparatus according to claim 18, wherein the activating means comprises two activating devices, wherein one activating device is hard wired to the circuit interrupting device and activates the test circuitry or the reset circuitry by sending a signal along the hard wire to the circuit interrupting means, and wherein the other activating device is a wireless activating devise that activates the test circuitry or the reset circuitry by transmitting a wireless signal to the circuit interrupting means.
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US11/234,185 US7440246B2 (en) | 2004-10-15 | 2005-09-26 | Circuit interrupting apparatus with remote test and reset activation |
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-
2005
- 2005-09-26 US US11/234,185 patent/US7440246B2/en active Active
- 2005-10-14 CN CNA2005101373043A patent/CN1835168A/en active Pending
- 2005-10-17 CA CA002523516A patent/CA2523516A1/en not_active Abandoned
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2009067794A1 (en) * | 2007-11-26 | 2009-06-04 | Optimal Innovations Inc. | Infrastructure device with modular remote sensors |
US9791117B2 (en) | 2013-04-02 | 2017-10-17 | Thomas & Betts International Llc | Emergency lighting fixture with remote control |
Also Published As
Publication number | Publication date |
---|---|
CN1835168A (en) | 2006-09-20 |
US20060152867A1 (en) | 2006-07-13 |
US7440246B2 (en) | 2008-10-21 |
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EEER | Examination request | ||
FZDE | Discontinued |