# US 2023/0054526 A1 · Circuit breaker and power distribution box > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0054526 A1 - Document ID: US20230054526A1 - Status: Published application - Kind: A1 - Application number: 17/981,215 - Filed: 2022-11-04 - Published: 2023-02-23 - Earliest claimed: 2020-05-08 - Assignees: Huawei Digital Power Technologies Co., Ltd. - Applicants: Huawei Digital Power Technologies Co., Ltd. - Inventors: Zehua LIANG; Wei GUO; Yanxing YANG - Web page: https://patentgrep.com/patent/US20230054526A1 ## CPC - H01H 71/10: Operating or release mechanisms - H01H 71/58: actuated by push-button, pull-knob, or slide - H01H 71/02: Housings; Casings; Bases; Mountings - H02G 3/08: Distribution boxes; Connection or junction boxes - H01H 3/46: using rod or lever linkage, e.g. toggle - H01H 50/045: {Details particular to contactors (H01H50/042 takes precedence)} - H01H 71/16: with bimetal element {(combined with detection of imbalance of two or more currents H01H83/223)} - H01H 71/2472: {with rotatable armatures} - H01H 73/08: Plug-in housings - 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) - H02G: INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES ## Abstract This application discloses a circuit breaker and a power distribution box, and relates to the field of communication device technologies. The circuit breaker includes a housing, a control apparatus, and a current signal collection mechanism, an operating mechanism, and a contactor mechanism that are disposed in the housing. The current signal collection mechanism has a first fixed contact and a second fixed contact that are electrically connected. The operating mechanism has a rotating part and a first moving contact. The first moving contact is electrically connected to a first electrode cable inlet port of the circuit breaker. Rotating the rotating part may make a circuit between the first moving contact and the first fixed contact connected/disconnected. ## Claims ### Claim 1 A circuit breaker, comprising: a housing, a current signal collection mechanism, an operating mechanism, a contactor mechanism, cable inlet ports, cable outlet ports, and a control apparatus, wherein: the current signal collection mechanism, the operating mechanism, and the contactor mechanism are disposed in the housing; the current signal collection mechanism comprises a first fixed contact and a second fixed contact, and the first fixed contact is electrically connected to the second fixed contact; the cable inlet ports are connected to a power supply line and comprise a first electrode cable inlet port and a second electrode cable inlet port; the operating mechanism has a rotating part and a first moving contact, the first moving contact is electrically connected to the first electrode cable inlet port, and the rotating part is capable of driving the first moving contact to rotate, wherein rotating causes a circuit between the first moving contact and the first fixed contact to become connected or disconnected; the cable outlet ports are connected to a power receiving line and comprise a first electrode cable outlet port and a second electrode cable outlet port, the first electrode cable outlet port is electrically connected to a second moving contact, and the second electrode cable outlet port is electrically connected to the second electrode cable inlet port; and the control apparatus is configured to control the contactor mechanism to drive the second moving contact to move, wherein moving causes a circuit between the second moving contact and the second fixed contact to become connected or disconnected. ### Claim 2 (depends on 1) The circuit breaker according to claim 1, wherein: the circuit breaker further comprises a signal port, and a signal terminal is disposed in the signal port; and the control apparatus is a signal circuit board, the signal circuit board is inserted into the signal port, and the signal terminal is connected to the signal circuit board by using a signal. ### Claim 3 (depends on 2) The circuit breaker according to claim 2, wherein a limiting structure is disposed in the signal port, a notch is disposed at an end of the signal circuit board, and the limiting structure is inserted into the notch. ### Claim 4 (depends on 1) The circuit breaker according to claim 1, wherein, at least one of the following: the control apparatus is further configured to: detect current intensity at the first fixed contact; and when the detected current intensity falls within a preset current intensity threshold range, determine that the circuit between the first fixed contact and the first moving contact is connected; or when the detected current intensity exceeds a preset current intensity threshold range, determine that the circuit between the first fixed contact and the first moving contact is disconnected; or the control apparatus is further configured to: detect current intensity at the second fixed contact; and when the detected current intensity falls within a preset current intensity threshold range, determine that the circuit between the second fixed contact and the second moving contact is connected; or when the detected current intensity exceeds a preset current intensity threshold range, determine that the circuit between the second fixed contact and the second moving contact is disconnected. ### Claim 5 (depends on 1) The circuit breaker according to claim 1, wherein: the circuit breaker further comprises a short-circuit protection mechanism, the short-circuit protection mechanism is disposed on one side of the operating mechanism, the short-circuit protection mechanism comprises an electromagnetic coil, an iron core, a shaft, an armature spring, and an armature, the electromagnetic coil is sleeved on the iron core, the armature spring is sleeved on the shaft, and the armature is fixedly connected to the armature spring, one end of the electromagnetic coil is electrically connected to the second moving contact through a conductor, and the other end of the electromagnetic coil is electrically connected to the first electrode cable outlet port; and when a current flowing through the electromagnetic coil exceeds a preset current threshold range, electromagnetic force generated by the electromagnetic coil attracts the armature to rotate around the shaft, and the armature pushes the rotating part to rotate, wherein the rotation of the rotating part causes the circuit between the first moving contact and the first fixed contact to be disconnected. ### Claim 6 (depends on 1) The circuit breaker according to claim 1, wherein: the circuit breaker further comprises an overload protection mechanism, and the overload protection mechanism is made of a material that can bend and deform when subjected to heat, and one end of the overload protection mechanism is rigidly connected to the first electrode cable inlet port; and when heat generated in the power receiving line exceeds a preset heat threshold range, the overload protection mechanism deforms and drives the rotating part of the operating mechanism to rotate, wherein the rotation of the rotating part of the operating mechanism causes the circuit between the first moving contact and the first fixed contact to be disconnected. ### Claim 7 (depends on 6) The circuit breaker according to claim 6, wherein: a first sliding slot is disposed on the rotating part of the operating mechanism, and a first connecting rod is disposed between the overload protection mechanism and the operating mechanism; and one end of the first connecting rod is hinged to the overload protection mechanism, and the other end of the first connecting rod is capable of sliding along the first sliding slot. ### Claim 8 (depends on 7) The circuit breaker according to claim 7, wherein a connecting part is disposed on an inner sidewall of the housing, a second sliding slot is disposed on the connecting part, and a hinge point between the first connecting rod and the overload protection mechanism is capable of sliding along the second sliding slot. ### Claim 9 (depends on 1) The circuit breaker according to claim 1, wherein the circuit breaker further comprises a button mechanism, and movement of the button mechanism is capable of driving the rotating part of the operating mechanism to rotate, wherein rotation of the rotating part of the operating mechanism causes the circuit between the first fixed contact and the first moving contact to be connected or disconnected. ### Claim 10 (depends on 9) The circuit breaker according to claim 9, wherein: the button mechanism comprises a button, a rotating shaft, and a second connecting rod, one end of the second connecting rod is fastened to an edge of the rotating shaft, and the other end of the second connecting rod is fastened to an edge of the rotating part of the operating mechanism; and when the button moves towards an interior of the housing, rotation of the rotating shaft drives the second connecting rod to rotate, and the rotating part rotates with the second connecting rod, wherein rotation of the rotating part with the second connecting rode causes the circuit between the first fixed contact and the first moving contact to be connected; or when the button moves towards an exterior of the housing, rotation of the rotating shaft drives the second connecting rod to rotate, and the rotating part rotates with the second connecting rod, wherein rotation of the rotating part with the second connecting rod causes the circuit between the first fixed contact and the first moving contact to be disconnected. ### Claim 11 (depends on 1) The circuit breaker according to claim 1, wherein the contactor mechanism is connected to the second moving contact through a push rod. ### Claim 12 (depends on 2) The circuit breaker according to claim 2, wherein: the circuit breaker further comprises an arc extinguishing mechanism, and the first fixed contact and the second fixed contact of the current collection mechanism is electrically connected to the arc extinguishing mechanism; and when the circuit breaker further comprises the signal port, and the signal terminal is disposed in the signal port, the arc extinguishing mechanism is electrically connected to the signal terminal. ### Claim 13 A power distribution box, used in a power supply and distribution system, comprising: a box body and a circuit breaker, wherein the circuit breaker comprises: a housing, a current signal collection mechanism, an operating mechanism, a contactor mechanism, cable inlet ports, cable outlet ports, and a control apparatus, wherein: the current signal collection mechanism, the operating mechanism, and the contactor mechanism are disposed in the housing; the current signal collection mechanism comprises a first fixed contact and a second fixed contact, and the first fixed contact is electrically connected to the second fixed contact; the cable inlet ports are connected to a power supply line and comprise a first electrode cable inlet port and a second electrode cable inlet port; the operating mechanism has a rotating part and a first moving contact, the first moving contact is electrically connected to the first electrode cable inlet port, and the rotating part is capable of driving the first moving contact to rotate, to make a circuit between the first moving contact and the first fixed contact connected or disconnected; the cable outlet ports are connected to a power receiving line and comprise a first electrode cable outlet port and a second electrode cable outlet port, the first electrode cable outlet port is electrically connected to a second moving contact, and the second electrode cable outlet port is electrically connected to the second electrode cable inlet port; and the control apparatus is configured to control the contactor mechanism to drive the second moving contact to move, to make a circuit between the second moving contact and the second fixed contact connected or disconnected; and the circuit breaker is inserted into the box body, and the circuit breaker is electrically connected to a power supply end of the power supply and distribution system. ### Claim 14 (depends on 13) The power distribution box according to claim 13, wherein: the power distribution box comprises a plurality of circuit breakers, and the plurality of circuit breakers are disposed in parallel; and each circuit breaker is electrically connected to one electrical device, or each circuit breaker is electrically connected to a plurality of electrical devices. ### Claim 15 (depends on 13) The power distribution box according to claim 13, wherein: the circuit breaker further comprises a signal port, and a signal terminal is disposed in the signal port; and the control apparatus is a signal circuit board, the signal circuit board is inserted into the signal port, and the signal terminal is connected to the signal circuit board by using a signal. ### Claim 16 (depends on 15) The power distribution box according to claim 15, wherein a limiting structure is disposed in the signal port, a notch is disposed at an end of the signal circuit board, and the limiting structure is inserted into the notch. ### Claim 17 (depends on 13) The power distribution box according to claim 13, wherein, at least one of the following: the control apparatus is further configured to: detect current intensity at the first fixed contact; and when the detected current intensity falls within a preset current intensity threshold range, determine that the circuit between the first fixed contact and the first moving contact is connected; or when the detected current intensity exceeds a preset current intensity threshold range, determine that the circuit between the first fixed contact and the first moving contact is disconnected; or the control apparatus is further configured to: detect current intensity at the second fixed contact; and when the detected current intensity falls within a preset current intensity threshold range, determine that the circuit between the second fixed contact and the second moving contact is connected; or when the detected current intensity exceeds a preset current intensity threshold range, determine that the circuit between the second fixed contact and the second moving contact is disconnected. ### Claim 18 (depends on 13) The power distribution box according to claim 13, wherein: the circuit breaker further comprises a short-circuit protection mechanism, the short-circuit protection mechanism is disposed on one side of the operating mechanism, the short-circuit protection mechanism comprises an electromagnetic coil, an iron core, a shaft, an armature spring, and an armature, the electromagnetic coil is sleeved on the iron core, the armature spring is sleeved on the shaft, and the armature is fixedly connected to the armature spring, one end of the electromagnetic coil is electrically connected to the second moving contact through a conductor, and the other end of the electromagnetic coil is electrically connected to the first electrode cable outlet port; and when a current flowing through the electromagnetic coil exceeds a preset current threshold range, electromagnetic force generated by the electromagnetic coil attracts the armature to rotate around the shaft, and the armature pushes the rotating part to rotate, wherein the rotation of the rotating part causes the circuit between the first moving contact and the first fixed contact to be disconnected. ### Claim 19 (depends on 13) The power distribution box according to claim 13, wherein: the circuit breaker further comprises an overload protection mechanism, and the overload protection mechanism is made of a material that can bend and deform when subjected to heat, and one end of the overload protection mechanism is rigidly connected to the first electrode cable inlet port; and when heat generated in the power receiving line exceeds a preset heat threshold range, the overload protection mechanism deforms and drives the rotating part of the operating mechanism to rotate, wherein the rotation of the rotating part of the operating mechanism causes the circuit between the first moving contact and the first fixed contact to be disconnected. ### Claim 20 (depends on 19) The power distribution box according to claim 19, wherein: a first sliding slot is disposed on the rotating part of the operating mechanism, and a first connecting rod is disposed between the overload protection mechanism and the operating mechanism; and one end of the first connecting rod is hinged to the overload protection mechanism, and the other end of the first connecting rod is capable of sliding along the first sliding slot.