# US 9,437,386 B2 · Protective wiring device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,437,386 B2 - Document ID: US9437386B2 - Status: Granted - Kind: B2 - Application number: 14/277,531 - Filed: 2014-05-14 - Published: 2015-11-19 - Granted: 2016-09-06 - Earliest claimed: 2014-05-14 - Assignees: Pass & Seymour, Inc. - Applicants: Pass & Seymour, Inc. - Inventors: Richard Weeks - Web page: https://patentgrep.com/patent/US9437386B2 ## CPC - G01R 31/52: Testing for short-circuits, leakage current or ground faults - G01R 15/18: using inductive devices, e.g. transformers - H01H 71/025: {Constructional details of housings or casings not concerning the mounting or assembly of the different internal parts} - H01H 83/02: operated by earth fault currents (H01H83/14 takes precedence) - H01H 83/04: with testing means for indicating the ability of the switch or relay to function properly - H01H 83/226: {with differential transformer} - H02B 13/00: Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle (switchgear having carriage withdrawable for isolation H02B11/00) - H02H 3/00: Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection (specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems H02H7/00; systems for change-over to standby supply H02J9/00 ){; integrated protection (for motors H02H7/0822)} - H02H 3/06: with automatic reconnection - H02H 3/105: {responsive to excess current and fault current to earth} - H02H 9/04: responsive to excess voltage (lightning arrestors H01C7/12, H01C8/04, H01G9/18, H01T) - H01H 71/0207: {Mounting or assembling the different parts of the circuit breaker} - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) - H01H: ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B7/10; electrolytic self-interrupters H01G9/18; emergency protective circuit arrangements H02H; switching by electronic means without contact-making H03K17/00) - H02B: BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER - H02H: EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS (indicating or signalling undesired working conditions G01R, e.g. G01R31/00, G08B; locating faults along lines G01R31/08; emergency protective devices H01H) ## Abstract The present is directed to a protective device that includes a separator portion disposed between a back body member and a front cover portion. The separator portion includes a reset pin aperture accessible via a first major surface facing the front cover and a reset pin guide portion disposed on an opposite second major surface facing the back body member. The device further includes a latch block assembly having a central latch block portion configured to accommodate a reset pin and a latching element. The central latch block portion includes an open side configured to accommodate the reset pin guide portion. The reset pin is substantially prevented from exiting the central latch block portion via the open side by the reset pin guide portion. ## Claims ### Claim 1 A protective device comprising: a housing assembly including a back body member and a front cover portion; a line interface assembly disposed on a first printed circuit board (PCB) in a first plane within the back body member, the first PCB having an interface aperture formed therein, the line interface assembly comprising a dielectric housing including a cylindrical enclosure and an interface portion, a toroidal sensor assembly comprising at least one toroidal sensor being disposed inside the cylindrical enclosure, the first PCB being configured to substantially cover the cylindrical enclosure to complete the cylindrical enclosure when the interface portion is inserted into the interface aperture, the toroidal sensor assembly not being electrically connected to the first PCB, the line interface assembly also including a plurality of line terminals having a hot line terminal portion and a neutral line terminal portion electrically connected to the first PCB, the line interface assembly also including a hot line contact arm and a neutral line contact arm at least one of which is routed through the toroidal sensor assembly, the hot line contact arm and the neutral line contact arm having termination portions configured to mate with the hot line terminal portion and the neutral line terminal portion, respectively, within the interface portion, the plurality of line terminals being coupled to at least one conditioning circuit disposed on the first PCB, the at least one conditioning circuit being configured to condition AC line signals; and an electromechanical circuit assembly disposed on a second (PCB) within the back body member, the second PCB being disposed in a second plane offset from the first plane by a predetermined distance and configured to receive the conditioned AC line signals, the second PCB also including a fault detection portion electrically coupled to the toroidal sensor assembly, the electro-mechanical circuit assembly including a plurality of load terminals, the plurality of load terminals and the plurality of line terminals being electrically coupled in a reset position and decoupled in a tripped position. ### Claim 2 (depends on 1) The device of claim 1, wherein the dielectric guide channel includes a test wire channel configured to accommodate a test wire, the test wire being routed through the at least one toroid aperture. ### Claim 3 (depends on 1) The device of claim 1, wherein the electro-mechanical circuit assembly further comprises: a circuit interrupter frame member disposed on the second PCB and including an actuator frame portion and a circuit interrupter support portion, the circuit interrupter support portion including a frame registration portion open to the second PCB thereunder; a solenoid actuator disposed in the actuator frame portion positioned adjacent to the line interface assembly; a latch block assembly including a central latch block portion and at least one bus bar holder, the central latch block portion configured to accommodate a reset pin and a latching element, the central latch block portion moving between the tripped position and the reset position within the frame registration portion; and at least one bus bar element configured to be disposed within the at least one bus bar holder, the at least one bus bar element including a bus bar line side contact and a bus bar load side contact, the at least one bus bar element being constrained in two orthogonal directions by the bus bar registration feature such that the bus bar line side contact and the bus bar load side contact are vertically aligned with a line contact and a load contact, respectively. ### Claim 4 (depends on 3) The device of claim 3, wherein the at least one bus bar holder includes a bus bar pivot element configured to pivot the at least one bus bar element about an axis such that a spring make force is substantially evenly distributed between the bus bar line side contact and the bus bar load side contact when the bus bar line side contact is closed with the line contact and the bus bar load side contact is closed with the load contact. ### Claim 5 (depends on 1) The device of claim 1, further comprising: a separator portion disposed between the back body member and the front cover portion, the separator portion including a reset pin aperture accessible via a first major surface facing the front cover and a reset pin guide portion disposed on an opposite second major surface facing the back body member; and a latch block assembly including a central latch block portion configured to accommodate a reset pin and a latching element, the central latch block portion including an open side configured to accommodate the reset pin guide portion, the reset pin being substantially prevented from exiting the central latch block portion via the open side by the reset pin guide portion. ### Claim 6 (depends on 5) The device of claim 5, further comprising at least one bus bar holder that includes at least one bus bar pivoting element configured to pivot a bus bar element about an axis parallel to the major surface so that a spring make force is substantially evenly distributed between a bus bar line side contact and a bus bar load side contact when the bus bar line side contact is closed with a line contact and the bus bar load side contact is closed with a load contact. ### Claim 7 (depends on 6) The device of claim 6, wherein the at least one bus bar pivoting element includes spaced apart lateral posts that accommodate a central tab portion of the bus bar element therebetween. ### Claim 8 (depends on 7) The device of claim 7, wherein the central tab portion is connected to the corresponding load terminal by a flexible cable. ### Claim 9 (depends on 1) The device of claim 1, wherein the electro-mechanical circuit assembly further comprises: a latch block assembly including a central latch block portion and at least one bus bar holder, the central latch block portion is configured to accommodate a reset pin and a latching element, the at least one bus bar holder including a bus bar pivot element and a bus bar registration feature; and at least one bus bar element configured to be disposed within the at least one bus bar holder, the at least one bus bar element including a bus bar line side contact and a bus bar load side contact, the at least one bus bar element being constrained in two orthogonal directions by the bus bar registration feature such that the bus bar line side contact and the bus bar load side contact are substantially aligned with a line contact and a load contact, respectively, within a plane, the bus bar pivot element being configured to pivot the at least one bus bar element about an axis within the plane such that a spring make force is substantially evenly distributed between the bus bar line side contact and the bus bar load side contact after a resetting operation. ### Claim 10 (depends on 1) The device of claim 1, wherein the dielectric housing includes a low voltage interface portion configured to accommodate electrical conductors coupled between the fault detection portion and the at least one toroidal sensor, the low voltage interface portion being configured to establish the offset between the first plane and the second plane. ### Claim 11 (depends on 1) The device of claim 1, wherein the plurality of load terminals includes a plurality of face terminals accessible by way of at least one set of openings in the front cover portion, the plurality of load terminals and the plurality of face terminals being electrically disconnected in the tripped state. ### Claim 12 (depends on 11) The device of claim 11, further comprising a plurality of bus bar elements, each bus bar element including a bus bar line side contact and a bus bar load side contact, the at least one bus bar element being constrained in two orthogonal directions by the bus bar registration feature such that the bus bar line side contact and the bus bar load side contact are vertically aligned with a line contact and a load contact, respectively. ### Claim 13 (depends on 12) The device of claim 12, wherein the plurality of bus bar elements are configured to couple the plurality of line terminals, the plurality of load terminals and the plurality of face terminals in the reset state, and disconnect the plurality of line terminals, the plurality of load terminals and the plurality of face terminals in the tripped state. ### Claim 14 (depends on 12) The device of claim 12, wherein the bus bar load side contact is coupled to a flexible cable connected to a respective one of the plurality of load terminals. ### Claim 15 (depends on 1) The device of claim 1, wherein the at least one toroidal sensor is configured to sense a ground fault, a grounded neutral fault, or an arc fault. ### Claim 16 (depends on 1) The device of claim 1, wherein the at least one conditioning circuit includes a circuit selected from a group of circuits that includes at least one of a spark gap structure, a capacitive filter, a movistor (MOV), an RC circuit, an RLC circuit, the at least one toroidal sensor, or a power supply. ### Claim 17 (depends on 1) The device of claim 1, wherein the dielectric housing is configured to electrically isolate the hot line contact arm and the neutral line contact arm from the at least one toroidal sensor. ### Claim 18 A protective device comprising: a separator portion disposed between a back body member and a front cover portion, the separator portion including a reset pin aperture accessible via a first major surface facing the front cover and a reset pin guide portion disposed on an opposite second major surface facing the back body member, the device further comprising a latch block assembly including a central latch block portion configured to accommodate a reset pin and a latching element, the central latch block portion including an open side configured to accommodate the reset pin guide portion, the reset pin being substantially prevented from exiting the central latch block portion via the open side by the reset pin guide portion; a line interface assembly being disposed on a first printed circuit board (PCB) in a first plane within the back body member, the line interface assembly comprising a dielectric housing including an enclosure and an interface portion, a toroidal sensor assembly comprising at least one toroidal sensor being disposed inside the enclosure, the first PCB being configured to substantially cover the enclosure to complete the enclosure when the interface portion is coupled to the first PCB, the toroidal sensor assembly not being electrically connected to the first PCB; and an electromechanical circuit assembly disposed on a second PCB within the back body member, the second PCB being disposed in a second plane offset from the first plane by a predetermined distance, the second PCB also including a fault detection portion electrically coupled to the toroidal sensor assembly. ### Claim 19 (depends on 18) The device of claim 18, further comprising at least one conditioning circuit disposed on the first PCB and configured to provide conditioned AC line signals to a second PCB, the at least one conditioning circuit being selected from a group of circuits that includes at least one of a spark gap structure, a capacitive filter, a movistor (MOV), an RC circuit, an RLC circuit, the at least one toroidal sensor, or a power supply. ### Claim 20 A protective device comprising: a housing assembly including a back body member and a front cover portion; a line interface assembly disposed on a first printed circuit board (PCB) in a first plane within the back body member, the first PCB having at least one PCB opening, the line interface assembly comprising a dielectric housing including a cylindrical enclosure, a toroidal sensor assembly comprising at least one toroidal sensor disposed inside the cylindrical enclosure and mounted to a first side of the first PCB, the line interface assembly also including a plurality of line terminals having a hot line terminal portion and a neutral line terminal portion electrically connected to the first PCB, the line interface assembly also including a hot line contact arm and a neutral line contact arm at least one of which is routed through the toroidal sensor assembly, the dielectric housing and the first PCB electrically isolating the hot line contact arm and the neutral line contact arm from the at least one toroidal sensor, the hot line contact arm and the neutral line contact arm having a hot contact arm termination portion and a neutral contact arm termination portion, respectively, the hot contact arm termination portion and the neutral contact arm termination portion reeving the at least one PCB opening to interconnect with the hot line terminal portion and the neutral line terminal portion, respectively, the plurality of line terminals being coupled to at least one circuit element disposed on the first PCB, the at least one circuit element being configured to condition AC line signals; and an electromechanical circuit assembly coupled to the first (PCB) within the back body member, the electromechanical circuit assembly being configured to receive the conditioned AC line signals, the electromechanical circuit assembly also including a fault detection portion electrically coupled to the toroidal sensor assembly, the electro-mechanical circuit assembly including a plurality of load terminals, the plurality of load terminals and the plurality of line terminals being electrically coupled in a reset position and decoupled in a tripped position, the electro-mechanical circuit assembly further includes, a circuit interrupter frame member disposed on the second PCB and including an actuator frame portion and a circuit interrupter support portion, the circuit interrupter support portion including a frame registration portion open to the second PCB thereunder; a solenoid actuator disposed in the actuator frame portion positioned adjacent to the line interface assembly; a latch block assembly including a central latch block portion and at least one bus bar holder, the central latch block portion configured to accommodate a reset pin and a latching element, the central latch block portion moving between the tripped position and the reset position within the frame registration portion; and at least one bus bar element configured to be disposed within the at least one bus bar holder, the at least one bus bar element including a bus bar line side contact and a bus bar load side contact, the at least one bus bar element being constrained in two orthogonal directions by the bus bar registration feature such that the bus bar line side contact and the bus bar load side contact are vertically aligned with a line contact and a load contact, respectively. ### Claim 21 (depends on 20) The device of claim 20, wherein the test conductor is coupled between at least one of a hot conductor or neutral conductor, and a portion of the electromechanical circuit assembly. ### Claim 22 (depends on 20) The device of claim 20, wherein the at least one circuit element includes a circuit element selected from a group of circuit elements that includes at least one of a spark gap structure, a capacitive filter, a movistor (MOV), an RC circuit, an RLC circuit, the at least one toroidal sensor, or a power supply. ### Claim 23 (depends on 20) The device of claim 20, wherein the at least one toroidal sensor is configured to sense a ground fault, a grounded neutral fault, or an arc fault. ### Claim 24 (depends on 20) The device of claim 20, wherein the hot line contact arm and the neutral line contact arm are connected to the hot line terminal portion and the neutral line terminal portion, respectively, within a conductor interface portion. ### Claim 25 (depends on 24) The device of claim 24, wherein the dielectric housing includes a dielectric guide channel configured to accommodate the hot line contact arm and a neutral line contact arm within the toroidal sensor assembly. ### Claim 26 (depends on 25) The device of claim 25, wherein the conductor interface portion is coupled to the first PCB at one end of the dielectric guide channel. ### Claim 27 (depends on 20) The device of claim 20, wherein the at least one bus bar holder includes a bus bar pivot element configured to pivot the at least one bus bar element about an axis such that a spring make force is substantially evenly distributed between the bus bar line side contact and the bus bar load side contact when the bus bar line side contact is closed with the line contact and the bus bar load side contact is closed with the load contact. ### Claim 28 (depends on 20) The device of claim 20, wherein the electro-mechanical circuit assembly further comprises: a latch block assembly including a central latch block portion and at least one bus bar holder, the central latch block portion is configured to accommodate a reset pin and a latching element, the at least one bus bar holder including a bus bar pivot element and a bus bar registration feature; and at least one bus bar element configured to be disposed within the at least one bus bar holder, the at least one bus bar element including a bus bar line side contact and a bus bar load side contact, the at least one bus bar element being constrained in two orthogonal directions by the bus bar registration feature such that the bus bar line side contact and the bus bar load side contact are substantially aligned with a line contact and a load contact, respectively, within a plane, the bus bar pivot element being configured to pivot the at least one bus bar element about an axis within the plane such that a spring make force is substantially evenly distributed between the bus bar line side contact and the bus bar load side contact during a resetting operation. ### Claim 29 (depends on 28) The device of claim 28, wherein the bus bar load side contact is coupled to a flexible cable connected to a respective one of the plurality of load terminals. ### Claim 30 (depends on 20) The device of claim 20, wherein the plurality of load terminals includes a plurality of face terminals accessible by way of at least one set of openings in the front cover portion, the plurality of load terminals and the plurality of face terminals being electrically disconnected in the tripped state. ### Claim 31 A protective device comprising: a housing assembly including a back body member and a front cover portion; a line interface assembly being disposed on a first printed circuit board (PCB) in a first plane within the back body member, the first PCB having an interface aperture formed therein, the line interface assembly comprising a dielectric housing including a cylindrical enclosure and an interface portion, a toroidal sensor assembly comprising at least one toroidal sensor being disposed inside the cylindrical enclosure, the first PCB being configured to substantially cover the cylindrical enclosure to complete the cylindrical enclosure when the interface portion is inserted into the interface aperture, the toroidal sensor assembly not being electrically connected to the first PCB, at least one conditioning circuit disposed on the first PCB and configured to condition AC line signals; and an electromechanical circuit assembly disposed on a second (PCB) within the back body member, the second PCB being disposed in a second plane offset from the first plane by a predetermined distance and configured to receive the conditioned AC line signals, the second PCB also including a fault detection portion electrically coupled to the toroidal sensor assembly. ### Claim 32 (depends on 31) The device of claim 31, wherein the electro-mechanical circuit assembly includes a plurality of load terminals, the plurality of load terminals and the plurality of line terminals being electrically coupled in a reset position and decoupled in a tripped position. ### Claim 33 (depends on 31) The device of claim 31, wherein the line interface assembly further includes: a plurality of line terminals having a hot line terminal portion and a neutral line terminal portion electrically connected to the first PCB; a hot line contact arm and a neutral line contact arm, at least one of which is routed through the toroidal sensor assembly, the hot line contact arm and the neutral line contact arm having termination portions configured to mate with the hot line terminal portion and the neutral line terminal portion, respectively, within the interface portion. ### Claim 34 (depends on 31) The device of claim 31, wherein the dielectric housing is configured to electrically isolate the hot line contact arm and the neutral line contact arm from the at least one toroidal sensor.