WO2021174802A1

WO2021174802A1 - Circuit breaker and control method

Info

Publication number: WO2021174802A1
Application number: PCT/CN2020/114706
Authority: WO
Inventors: 朱千彬; 陆胜利; 吴建生; 陈威挺; 郑熠; 黄应建; 李钱公; 欧阳海军; 王凯龙; 连旭日; 陈俊松; 童伟
Original assignee: 巨邦集团有限公司
Priority date: 2020-03-03
Filing date: 2020-09-11
Publication date: 2021-09-10
Also published as: CN111223725A

Abstract

A circuit breaker and a control method. The circuit breaker comprises: a built-in controller connected to a release (J1) via a contact of a relay (K1), and used to send a control signal to the release (J1) and to supply power to the release (J1); and a signal interface (JP3) connected to the release (J1) via the contact of the relay (K1), and used to receive a control signal and power sent by a remote control terminal, wherein the built-in controller is connected to the contact of the relay (K1) via a release interface (JP2) disposed inside the built-in controller. The solution enables a slot for a release (J1) inside the circuit breaker to be vacated, thus reducing interference points and enhancing the overall stability of the circuit breaker. In addition, the relay (K1) is used to filter disturbance signals so as to reduce incorrect operations of the release (J1).

Description

Circuit breaker and control method

Technical field

The invention relates to the field of circuit breaker protection control, in particular to a circuit breaker and a control method.

Background technique

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

Nowadays, most of the circuit breaker control systems on the market have multiple releases, which makes the internal structure compact and cannot install more auxiliary modules. At the same time, they are easily interfered by disturbance signals. Multiple releases will generate multiple interference points. It is easy to cause the trip unit to malfunction, making the stability of the circuit breaker poor.

technical problem

Therefore, the technical problem to be solved by the present invention is to overcome the shortcomings of compact internal structure, multiple interference points, and poor stability of the circuit breaker caused by too many internal releases of the circuit breaker in the prior art, thereby providing A circuit breaker and control method.

Technical solutions

To this end, the embodiments of the present invention provide the following technical solutions: In the first aspect, the embodiments of the present invention provide a circuit breaker, including: a built-in controller, a trip unit, a relay, and a signal interface, wherein the built-in controller passes through the relay The contact is connected with the trip unit, and is used to send control signals to the trip unit and provide power for the trip unit; the signal interface is connected with the trip unit through the relay contact, and is used to receive the control signal and power supply sent by the remote control terminal; The built-in controller is connected to the relay contacts through its internal trip unit interface.

In an embodiment, it further includes: a switch for controlling the action of the circuit breaker and indicating the working state of the circuit breaker.

In one embodiment, it further includes: an accessory slot for installing a circuit breaker accessory.

In an embodiment, the built-in controller includes: a power supply module, a signal sampling module, and a control module. The power supply module is used to provide power to the built-in controller and the trip unit; and the signal sampling module is used to collect circuit breaker protection. Signal; a control module for sending a control signal to control the action of the trip unit according to the circuit breaker protection signal.

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 wiring board temperature signal sampling module, wherein the leakage current signal sampling module is used to collect leakage current Signal; current signal sampling module, used to collect current signals; voltage signal sampling module, used to collect voltage signals; wiring board temperature signal sampling module, used to collect wiring board and contact temperature signals.

In a second aspect, an embodiment of the present invention provides a circuit breaker control method, 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 partial excitation trip signal, the built-in controller Control the action of the trip unit and supply power to the trip unit; when the remote control terminal sends an external excitation trip signal, the remote control terminal controls the action of the trip unit and supplies power to the trip unit.

In an embodiment, the remote control terminal sends a control signal and provides power to the trip unit through a signal interface.

In one embodiment, when the remote control terminal does not send the external partial excitation trip signal, the coil of the relay loses power; when the remote control terminal sends the external partial excitation trip signal, the coil of the relay is energized.

Beneficial effect

The technical solution of the present invention has the following advantages: a circuit breaker and a control method provided by the present invention, by combining a trip unit controlled by a built-in controller and a trip unit controlled by a remote control terminal into one, the use of one trip unit is reduced, There is a slot in the circuit breaker switch, which can be used to install other accessories. In the process of production, processing and use, reducing one trip unit will reduce one interference point, which enhances the stability of the entire circuit breaker. At the same time, the relay can filter the disturbance signal and reduce the malfunction of the trip unit.

Description of the drawings

In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the specific embodiments or the description of the prior art. Obviously, the appendix in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

Fig. 1 is a diagram of a specific example of the internal connection of the circuit breaker in the embodiment of the present invention.

Fig. 2 is a diagram of a specific example of the circuit breaker in the embodiment of the present invention.

Fig. 3 is a functional block diagram of a specific example of the built-in controller of the circuit breaker in the embodiment of the present invention.

Fig. 4 is a functional block diagram of a specific example of a circuit breaker signal sampling module in an embodiment of the present invention.

The best mode of the present invention

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

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

In the description of the present invention, it should be noted that the terms "installed", "connected", and "connected" should be understood in a broad sense unless otherwise clearly specified and limited. For example, they can be fixed or detachable. Connected or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of the two components, it can be a wireless connection, or it can be a wired connection connect. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in the present invention can be understood in specific situations.

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.

Embodiment 1 : The embodiment of the invention provides a circuit breaker, which can be used to distribute electric energy, start asynchronous motors infrequently, and protect power lines and motors when they experience serious overload, short circuit, and undervoltage faults. Automatically cut off the circuit. As shown in Figure 1, the circuit breaker includes: a built-in controller, a trip unit J1, a relay K1, and a signal interface JP3. The built-in controller is connected to the trip unit J1 through a relay K1 contact, and is used to send a control signal to the trip unit. The trip unit J1 also provides power for 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 the control signal and power supply sent by the remote control terminal; the built-in controller uses its internal trip unit The interface JP2 is connected with the contact of the relay K1.

In this embodiment, the built-in controller is connected to the contact of the relay K1 through its internal release interface JP2. When the coil of the relay is de-energized, the contact 5 of the relay is closed with the contact 1, and the contact 6 is connected with the contact 2. Closed, at this time, the release interface JP2 is connected to the release J1 through the closed contact of the relay K1. The built-in controller is connected to the trip unit J1 through the relay K1 contact to provide power to the trip unit J1. When the load is abnormal, the built-in controller is connected to the contact of the relay K1 through the internal release interface JP2, and sends a control signal to control the release J1 to open the circuit breaker to protect the back-end load.

The external partial excitation 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, contact 5 and contact 3 of the relay are closed, and contact 6 and contact 4 are closed. , The signal interface JP3 is connected to the trip unit J1 through the closed contact of the relay K1. When the outside determines that it is necessary to intervene and break the load circuit, the remote control terminal sends an external partial excitation trip signal and controls the trip unit J1 to open the circuit breaker to protect the back-end load. At the same time, the remote control terminal provides power to the trip unit through the signal interface 3. Among them, the type of the trip unit can be an electromagnetic trip unit or an electronic trip unit.

The circuit breaker provided by the present invention combines a trip unit controlled by a built-in controller and a trip unit controlled by a remote control terminal into one, thereby reducing the use of a trip unit and vacating a slot in the circuit breaker switch. It can be installed for other accessories to vacate the position. In the process of production, processing and use, the reduction of a trip unit will reduce an interference point, which enhances the stability of the entire circuit breaker. At the same time, the relay filters the disturbance signal according to the voltage and the voltage duration to reduce the malfunction of the trip unit.

In an embodiment, as shown in Figure 2, (a) is a top view of the circuit breaker, (b) is a schematic diagram of the three-dimensional structure of the circuit breaker, the circuit breaker further includes: switch 4 and accessory slots, where switch 4 is used for control The circuit breaker operates and indicates the working status of the circuit breaker; the accessory slot is used to install the circuit breaker accessories. In this embodiment, the built-in controller 1 is connected to the contact of the relay 3 through its internal release interface JP2, and sends a control signal to control the release 2. The accessory slot is used to install the accessories inside the circuit breaker, such as: trip unit, switch and alarm device. As the derivation and supplement of the circuit breaker function, the accessories of the circuit breaker add control means and expand the protection function for the circuit breaker. By merging the trip unit controlled by the built-in controller and the trip unit controlled by the remote control terminal into one, the space occupied by the trip unit in accessory slot 5 or accessory slot 6 is reduced, and a free position for other accessories is installed.

In one embodiment, as shown in FIG. 3, the built-in controller includes: a power supply module 1, a signal sampling module 2, and a control module 3. The power supply module 1 is used to provide power for the built-in controller and the trip unit; The sampling module 2 is used to collect the circuit breaker protection signal; the control module 3 is used to send the control signal to control the action of the trip unit according to the circuit breaker protection signal. In this embodiment, the power module 1 not only supplies power to the built-in controller, but also supplies power to the trip unit through the trip unit interface JP2. The control module 3 sends a control signal to the trip unit J1 through the trip unit interface JP2 according to the load abnormal protection signal collected by the signal sampling unit 2, and controls the trip unit J1 to open the circuit breaker to protect the back-end load.

In one embodiment, as shown in FIG. 4, the signal sampling module 2 includes: a leakage current signal sampling module 21, a current signal sampling module 22, a voltage signal sampling module 23, and a wiring board temperature signal sampling module 24, wherein the leakage current The signal sampling module 21 is used to collect leakage current signals; the current signal sampling module 22 is used to collect current signals; the voltage signal sampling module 23 is used to collect voltage signals; the wiring board temperature signal sampling module 24 is used to collect wiring boards and Contact temperature signal. In this embodiment, the control module 3 judges whether it is necessary to send a control signal to control the action of the trip unit to divide the circuit breaker according to the collected leakage current signal, current signal, voltage signal, wiring board and contact temperature signal and other open circuit protection signals. brake.

Embodiment 2 : The embodiment of the invention provides a circuit breaker control method. 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 partial excitation trip signal, the built-in controller controls the trip When the remote control terminal sends an external partial excitation trip signal, the remote control terminal controls the action of the release and supplies power to the release.

In this embodiment, when the remote control terminal does not send the external partial excitation trip signal, when the load is abnormal, the built-in controller is connected to the contact of the relay K1 through its internal trip interface JP2, and the relay's coil is at this time. In the power-off state, contact 5 and contact 1 of the relay are closed, and contact 6 and contact 2 are closed. At this time, the trip unit interface JP2 is connected to the trip unit J1 through the closing contact of the relay K1. The built-in controller is connected to the contact of the relay K1 through the internal release interface JP2, and sends a control signal to control the release J1 to open the circuit breaker to protect the back-end load.

When the remote control terminal sends the external partial excitation trip signal, the external partial excitation 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, and the contact 5 of the relay is in contact with the circuit breaker. Point 3 is closed, contact 6 and contact 4 are closed. At this time, the signal interface JP3 is connected to the trip unit J1 through the closed contact of the relay K1. When the outside determines that it is necessary to intervene and break the load circuit, the remote control terminal sends an external partial excitation trip signal and controls the trip unit J1 to open the circuit breaker to protect the back-end load.

In an embodiment, the remote control terminal sends a control signal and provides power to the trip unit through a signal interface. In this embodiment, the remote control terminal sends an external partial excitation trip signal through the signal interface JP3, controls the trip unit J1 to open the circuit breaker, and at the same time provides power to the trip unit J1.

In one embodiment, when the remote control terminal does not send the external partial excitation trip signal, the coil of the relay loses power; when the remote control terminal sends the external partial excitation trip signal, the coil of the relay is energized. In this embodiment, when the remote control terminal does not send the external partial excitation trip signal, the coil of the relay is in a de-energized state at this time, the contact 5 of the relay is closed with the contact 1, and the contact 6 and the contact 2 are closed. When the remote control terminal sends the external partial excitation trip signal, the coil of the relay is in the energized state at this time, the contact 5 and contact 3 of the relay are closed, and the contact 6 and contact 4 are closed.

The present invention provides a circuit breaker control method. When the remote control terminal does not send the external partial excitation trip signal, the built-in controller controls the action of the tripper to open the circuit breaker; when the remote control terminal sends the external partial excitation trip When the signal is signaled, the remote control terminal controls the release action to open the circuit breaker. By combining the built-in controller controlled release and the remote control terminal controlled release into one, the use of one release is reduced. There is a slot in the switch, which can be used to install other accessories. In the process of production, processing and use, reducing one trip unit will reduce one interference point, which enhances the stability of the entire circuit breaker.

Obviously, the above-mentioned embodiments are merely examples for clear description, and are not intended to limit the implementation manners. For those of ordinary skill in the art, other changes or modifications in different forms can be made on the basis of the above description. It is unnecessary and impossible to list all the implementation methods here. The obvious changes or changes derived from this are still within the protection scope created by the present invention.

Claims

A circuit breaker, which is characterized by 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 through the relay contacts, and is used to send control signals to the trip unit and provide power to the trip unit;

The signal interface is connected to the trip unit through the relay contact, and is used to receive the control signal and power supply sent by the remote control terminal;

The built-in controller is connected to the relay contacts through its internal trip unit interface.
The circuit breaker according to claim 1, further comprising: a switch for controlling the action of the circuit breaker and indicating the working state of the circuit breaker.
The circuit breaker according to claim 2, further comprising: an accessory slot for installing accessories of the circuit breaker.
The circuit breaker according to claim 1, wherein the built-in controller comprises: a power supply module, a signal sampling module, and a control module, wherein:

Power module, used to provide power for the built-in controller and trip unit;

Signal sampling module, used to collect open circuit protection signals;

The control module is used to send a control signal to control the action of the trip unit according to the circuit breaker protection signal.
The circuit breaker according to claim 4, wherein the signal sampling module comprises: 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:

Leakage current signal sampling module, used to collect leakage current signal;

Current signal sampling module, used to collect current signals;

Voltage signal sampling module, used to collect voltage signals;

The terminal board temperature signal sampling module is used to collect the terminal board and contact temperature signals.
A method for controlling a circuit breaker, characterized in that the circuit breaker is controlled by a built-in controller and a remote control terminal, and includes:

When the remote control terminal does not send the external partial excitation trip signal, the built-in controller controls the action of the trip unit and supplies power to the trip unit;

When the remote control terminal sends an external partial excitation trip signal, the remote control terminal controls the action of the trip unit and supplies power to the trip unit.
The circuit breaker control method according to claim 6, wherein the remote control terminal sends a control signal to the trip unit through a signal interface and provides power.
The circuit breaker control method according to claim 7, wherein:

When the remote control terminal does not send the external partial excitation trip signal, the coil of the relay loses power;

When the remote control terminal sends the external partial excitation trip signal, the coil of the relay is energized.