A circuit breaker and a control method

Abstract

The present invention provides a circuit breaker and a control method, the circuit breaker comprising: a built-in controller connected to a trip unit through a relay contact, used to send a control signal to the trip unit and provide power to the trip unit; a signal interface connected to the trip unit through a relay contact, used to receive a control signal and power sent by a remote control terminal; the built-in controller is connected to the relay contact through its internal trip unit interface. By implementing the present invention, a trip unit slot is vacated inside the circuit breaker, interference points are reduced, and the stability of the entire circuit breaker is enhanced. At the same time, the relay is used to filter the disturbance signal to reduce the malfunction of the trip unit.

Description

Technical Field

[0001] The present invention relates to the field of circuit breaker protection control, and in particular to a circuit breaker and a control method. Background Art

[0002] The circuit breaker has the characteristics of advanced structure, reliable performance, strong breaking capacity, beautiful and compact appearance, etc. It is used for overload and short-circuit protection of lighting, distribution lines and equipment in office buildings, residential buildings and similar buildings, and can also be used for infrequent on-off operation and conversion of lines.

[0003] Most circuit breaker control systems on the market now have multiple releases, which makes the internal structure compact and unable to install more auxiliary modules. At the same time, it is also easy to be interfered by disturbance signals. Multiple releases will produce multiple interference points, which can easily cause the release to malfunction and make the circuit breaker less stable. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the circuit breaker in the prior art, such as the compact internal structure, the easy generation of multiple interference points, and the poor stability of the circuit breaker caused by too many internal releases, thereby providing a circuit breaker and a control method.

[0005] To this end, the embodiment of the present invention provides the following technical solutions:

[0006] In a first aspect, an embodiment of the present invention provides a circuit breaker, comprising: a built-in controller, a trip unit, a relay and a signal interface, wherein the built-in controller is connected to the trip unit via relay contacts, and is used to send a control signal to the trip unit and provide power to the trip unit; the signal interface is connected to the trip unit via relay contacts, and is used to receive a control signal and power sent by a remote control terminal; the built-in controller is connected to the relay contacts via its internal trip unit interface.

[0007] In one embodiment, it further includes: a switch for controlling the action of the circuit breaker and indicating the working status of the circuit breaker.

[0008] In one embodiment, it further includes: an accessory slot for installing circuit breaker accessories.

[0009] In one embodiment, the built-in controller includes: a power module, a signal sampling module and a control module, wherein the power module is used to provide power for the built-in controller and the release; the signal sampling module is used to collect the circuit breaker protection signal; the control module is used to send a control signal according to the circuit breaker protection signal to control the action of the release.

[0010] In one embodiment, the signal sampling module includes: a leakage current signal sampling module, a current signal sampling module, a voltage signal sampling module and a terminal board temperature signal sampling module, wherein the leakage current signal sampling module is used to collect leakage current signals; the current signal sampling module is used to collect current signals; the voltage signal sampling module is used to collect voltage signals; and the terminal board temperature signal sampling module is used to collect terminal board and contact temperature signals.

[0011] In a second aspect, an embodiment of the present invention provides a circuit breaker control method, wherein the circuit breaker is controlled by a built-in controller and a remote control terminal, including: when the remote control terminal does not send an external shunt tripping signal, the built-in controller controls the action of the tripper and supplies power to the tripper; when the remote control terminal sends an external shunt tripping signal, the remote control terminal controls the action of the tripper and supplies power to the tripper.

[0012] In one embodiment, the remote control terminal sends a control signal to the release and provides power through a signal interface.

[0013] In one embodiment, when the remote control terminal does not send an external shunt trip signal, the coil of the relay loses power; when the remote control terminal sends an external shunt trip signal, the coil of the relay is energized.

[0014] The technical solution of the present invention has the following advantages:

[0015] The present invention provides a circuit breaker and control method, which combines a release controlled by a built-in controller and a release controlled by a remote control terminal into one, thereby reducing the use of one release, freeing up a slot in the circuit breaker switch, and freeing up space for other accessories to be installed. During production, processing and use, reducing one release means reducing one interference point, thereby enhancing the stability of the entire circuit breaker. At the same time, the relay can filter the disturbance signal and reduce the malfunction of the release. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A specific example diagram of the internal connection of a circuit breaker in an embodiment of the present invention;

[0018] FIG2( a ) is a top view of a circuit breaker according to an embodiment of the present invention;

[0019] FIG2( b ) is a schematic diagram of the three-dimensional structure of a circuit breaker in an embodiment of the present invention;

[0020] Figure 3 It is a principle block diagram of a specific example of a built-in controller of a circuit breaker in an embodiment of the present invention;

[0021] Figure 4 The schematic diagram is a schematic diagram of a circuit breaker signal sampling module according to a specific example of the present invention. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can also be the internal connection of two components, it can be a wireless connection, or it can be a wired connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0026] Example 1

[0027] The embodiment of the present invention provides a circuit breaker that can be used to distribute electric energy, start asynchronous motors infrequently, protect power lines and motors, and automatically cut off the circuit when they are seriously overloaded or have faults such as short circuits and undervoltage. Figure 1As shown, the circuit breaker includes: a built-in controller 21, a trip unit J1, a relay K1 and a signal interface JP3, wherein the built-in controller 21 is connected to the trip unit J1 through the relay K1 contact, and is used to send a control signal to the trip unit J1 and provide power to the trip unit J1; the signal interface JP3 is connected to the trip unit J1 through the relay K1 contact, and is used to receive a control signal and power sent by a remote control terminal; the built-in controller 21 is connected to the relay K1 contact through its internal trip unit interface JP2.

[0028] In this embodiment, the built-in controller 21 is connected to the contact of the relay K1 through its internal tripping device interface JP2. When the coil of the relay loses power, the contact 5 of the relay is closed with the contact 1, and the contact 6 is closed with the contact 2. At this time, the tripping device interface JP2 is connected to the tripping device J1 through the closed contact of the relay K1. The built-in controller 21 is connected to the tripping device J1 through the contact of the relay K1 to provide power to the tripping device J1. When the load is abnormal, the built-in controller 21 is connected to the contact of the relay K1 through the internal tripping device interface JP2, and sends a control signal to control the tripping device J1 to open the circuit breaker to protect the rear-end load.

[0029] The external shunt trip signal sent by the remote control terminal is transmitted to the circuit breaker through the signal interface JP3. When the coil of the relay is energized, the contact 5 of the relay is closed with the contact 3, and the contact 6 is closed with the contact 4. At this time, the signal interface JP3 is connected to the release J1 through the closed contact of the relay K1. When the external judgment requires intervention and disconnection of the load circuit, the remote control terminal sends an external shunt trip signal to control the release J1 to open the circuit breaker to protect the rear-end load. At the same time, the remote control terminal provides power to the release through the signal interface JP3. Among them, the type of the release can be an electromagnetic release or an electronic release, which is only taken as an example and is not limited to this.

[0030] The circuit breaker provided by the present invention combines a release controlled by a built-in controller and a release controlled by a remote control terminal into one, thereby reducing the use of one release and freeing up a slot in the circuit breaker switch for installing other accessories. During production, processing and use, reducing one release means reducing one interference point, thereby enhancing the stability of the entire circuit breaker. At the same time, the relay filters the disturbance signal according to the voltage size and voltage duration, thereby reducing the malfunction of the release.

[0031] In one embodiment, as shown in FIG2 , (a) is a top view of the circuit breaker, and (b) is a schematic diagram of the three-dimensional structure of the circuit breaker. The circuit breaker also includes: a switch 24 and an accessory slot, wherein the switch 24 is used to control the circuit breaker action and indicate the circuit breaker working state; the accessory slot is used to install the circuit breaker accessories. In this embodiment, the built-in controller 21 is connected to the relay K1 contact through its internal tripping device interface JP2, and sends a control signal to control the tripping device J1. The accessory slot is used to install accessories inside the circuit breaker, such as: a tripping device, a switch, and an alarm device. As a derivative and supplement to the circuit breaker function, the accessories of the circuit breaker add control means and expand the protection function to the circuit breaker. By merging the tripping device controlled by the built-in controller 21 and the tripping device controlled by the remote control terminal into one, the space occupied by the tripping device in the accessory slot 25 or the accessory slot 26 is reduced, and a space is vacated for the installation of other accessories.

[0032] In one embodiment, if Figure 3 As shown, the built-in controller 21 includes: a power module 211, a signal sampling module 212 and a control module 213, wherein the power module 211 is used to provide power for the built-in controller 21 and the release J1; the signal sampling module 212 is used to collect the circuit breaker protection signal; the control module 213 is used to send a control signal according to the circuit breaker protection signal to control the release J1 to operate. In this embodiment, the power module 211 not only supplies power to the built-in controller 21, but also supplies power to the release J1 through the release interface JP2. The control module 213 sends a control signal to the release J1 through the release interface JP2 according to the load abnormality protection signal collected by the signal sampling module 212, and controls the release J1 to open the circuit breaker to protect the rear-end load.

[0033] In one embodiment, if Figure 4 As shown, the signal sampling module 212 includes: a leakage current signal sampling module 2121, a current signal sampling module 2122, a voltage signal sampling module 2123 and a wiring board temperature signal sampling module 2124, wherein the leakage current signal sampling module 2121 is used to collect leakage current signals; the current signal sampling module 2122 is used to collect current signals; the voltage signal sampling module 2123 is used to collect voltage signals; the wiring board temperature signal sampling module 2124 is used to collect wiring board and contact temperature signals. In this embodiment, the control module 213 determines whether it is necessary to send a control signal to control the release J1 to open the circuit breaker according to the collected leakage current signal, current signal, voltage signal and wiring board and contact temperature signals and other circuit breaker protection signals.

[0034] Example 2

[0035] An embodiment of the present invention provides a circuit breaker control method, wherein the circuit breaker is controlled by a built-in controller and a remote control terminal, including: when the remote control terminal does not send an external shunt tripping signal, the built-in controller controls the release to operate and supplies power to the release; when the remote control terminal sends an external shunt tripping signal, the remote control terminal controls the release to operate and supplies power to the release.

[0036] In this embodiment, when the remote control terminal does not send an external shunt trip signal, when the load is abnormal, the built-in controller 21 is connected to the contact of the relay K1 through its internal trip interface JP2. At this time, the coil of the relay is in a de-energized state, the contact 5 of the relay is closed with the contact 1, and the contact 6 is closed with the contact 2. At this time, the trip interface JP2 is connected to the trip J1 through the closed contact of the relay K1. The built-in controller 21 is connected to the contact of the relay K1 through the internal trip interface JP2, and sends a control signal to control the trip J1 to open the circuit breaker to protect the rear-end load.

[0037] When the remote control terminal sends an external shunt trip signal, the external shunt trip signal sent by the remote control terminal is transmitted to the circuit breaker through the signal interface JP3. At this time, the coil of the relay is in the energized state, the contact 5 of the relay is closed with the contact 3, and the contact 6 is closed with the contact 4. At this time, the signal interface JP3 is connected to the release J1 through the closed contact of the relay K1. When the external judgment requires intervention and disconnection of the load circuit, the remote control terminal sends an external shunt trip signal to control the release J1 to open the circuit breaker to protect the rear-end load.

[0038] In one embodiment, the remote control terminal sends a control signal and provides power to the release through the signal interface. In this embodiment, the remote control terminal sends an external shunt trip signal through the signal interface JP3 to control the release J1 to open the circuit breaker and provide power to the release J1.

[0039] In one embodiment, when the remote control terminal does not send an external shunt trip signal, the coil of the relay is de-energized; when the remote control terminal sends an external shunt trip signal, the coil of the relay is energized. In this embodiment, when the remote control terminal does not send an external shunt trip signal, the coil of the relay is in a de-energized state, contact 5 of the relay is closed with contact 1, and contact 6 is closed with contact 2. When the remote control terminal sends an external shunt trip signal, the coil of the relay is in a energized state, contact 5 of the relay is closed with contact 3, and contact 6 is closed with contact 4.

[0040] The present invention provides a circuit breaker control method. When the remote control terminal does not send an external shunt tripping signal, the built-in controller controls the tripper to trip the circuit breaker; when the remote control terminal sends an external shunt tripping signal, the remote control terminal controls the tripper to trip the circuit breaker. By combining the tripper controlled by the built-in controller and the tripper controlled by the remote control terminal into one, the use of one tripper is reduced, a slot is vacated in the circuit breaker switch, and a position can be vacated for installing other accessories. During the production, processing and use process, reducing one tripper means reducing one interference point, thereby enhancing the stability of the entire circuit breaker.

[0041] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. A circuit breaker, characterized in that: include: Built-in controller, release, relay and signal interface, including: The built-in controller is connected to the release through relay contacts to send control signals to the release and provide power to the release; The signal interface is connected to the release through the relay contact and is used to receive the control signal and power sent by the remote control terminal; The built-in controller is connected to the relay contacts through its internal release interface; The built-in controller includes: a power module, a signal sampling module and a control module, wherein: A power module is used to provide power to the built-in controller and the trip unit; A signal sampling module is used to collect circuit breaker protection signals; A control module, used for sending a control signal according to the circuit breaker protection signal to control the action of the release; The signal sampling module includes: a leakage current signal sampling module, a current signal sampling module, a voltage signal sampling module and a wiring board temperature signal sampling module, wherein: A leakage current signal sampling module, used for collecting leakage current signals; A current signal sampling module, used for collecting current signals; A voltage signal sampling module is used to collect voltage signals; The wiring board temperature signal sampling module is used to collect the wiring board and contact temperature signals; It also includes: a switch, which is used to control the action of the circuit breaker and indicate the working state of the circuit breaker.

2. The circuit breaker according to claim 1, characterized in that: Also includes: Accessory slot, used to install circuit breaker accessories.

3. A circuit breaker control method according to any one of claims 1 to 2, characterized in that: The circuit breaker is controlled by a built-in controller and a remote control terminal, including: When the remote control terminal does not send an external shunt trip signal, the built-in controller controls the trip unit to operate and supplies power to the trip unit; When the remote control terminal sends an external shunt trip signal, the remote control terminal controls the release action and supplies power to the release.

4. The circuit breaker control method according to claim 3, characterized in that: The remote control terminal sends a control signal to the release and provides power through a signal interface.

5. The circuit breaker control method according to claim 4, characterized in that: When the remote control terminal does not send an external shunt trip signal, the relay coil loses power; When the remote control terminal sends an external shunt trip signal, the coil of the relay is energized.

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