Circuit breaker controller

Abstract

The utility model discloses a circuit breaker controller. The circuit breaker controller comprises a control module and a man-machine interaction module. The control module and the man-machine interaction module are mutually independent and are respectively provided with a near field communication circuit for realizing one-way electric energy transmission from the control module to the man-machine interaction module and two-way data transmission between the control module and the man-machine interaction module. Compared with the prior art, power supply and signal transmission are carried out in a near field communication mode, and man-machine interaction can be rapidly replaced under the condition that on-site power-off maintenance is not carried out.

Description

Technical Field

[0001] The utility model relates to a circuit breaker controller. Background Art

[0002] A circuit breaker is used in a power distribution network to close and disconnect a circuit, and automatically trip the circuit when abnormal current and voltage occur in the circuit to protect the safety of downstream electrical equipment. As the control core of the circuit breaker, the controller is responsible for sampling and calculating current and voltage signals in the circuit, controlling the circuit breaker to trip when necessary, and presenting various operation and maintenance data to the user through a display screen. The user can also input protection setting parameters into the circuit breaker through buttons or a touch screen.

[0003] The display screen of the controller usually uses materials such as liquid crystal and light-emitting diodes. In a harsh high-temperature and low-temperature environment, it will accelerate aging or increase the probability of damage. For the buttons used to operate the display screen, their contacts may be corroded and oxidized under the influence of corrosive gases, resulting in button failure. When the above problems occur, it is necessary to replace the display screen and buttons of the controller to ensure the integrity of the circuit breaker function. For the current circuit breaker controllers on the market, the display screens and buttons of most products are not designed as independent modules, so the entire circuit breaker controller needs to be replaced, resulting in high maintenance costs and the need for power outage maintenance; although the display screens and buttons of a few products are designed as independent modules and are connected to the controller through contacts, connectors, etc., although they can be replaced separately, there is a possibility of damaging the hardware during the live disassembly and installation process, and power outage is also required for maintenance. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a circuit breaker controller that adopts independent control modules and human-machine interaction modules, and uses near-field communication for power supply and signal transmission, so that the human-machine interaction can be quickly replaced without power outage maintenance on-site.

[0005] The utility model specifically adopts the following technical solutions:

[0006] A circuit breaker controller includes a control module and a human-machine interaction module; the control module and the human-machine interaction module are independent of each other and are respectively configured with near-field communication circuits for realizing unidirectional power transmission from the control module to the human-machine interaction module and bidirectional data transmission between the control module and the human-machine interaction module.

[0007] Preferably, the control module and the human-machine interaction module respectively have independent insulating shells.

[0008] Preferably, the control module and the human-machine interaction module are fixedly connected through a detachable fixing device.

[0009] Further, a status indicator light is provided on the control module for indicating the connection status between the control module and the human-machine interaction module and the working status of the control module.

[0010] Further, the control module and the human-machine interaction module are respectively configured with memories for storing operation and maintenance data and protecting set parameters, and the control module and the human-machine interaction module are configured to: when they are signal-connected, data synchronization between the two memories is first performed.

[0011] Further, a USB interface is provided in the human-machine interaction module.

[0012] Compared with the prior art, the technical solution of the present utility model and its further improvement have the following beneficial effects:

[0013] 1. The control module and the human-machine interaction module perform power transmission and communication in a wireless manner, support live disassembly and assembly, and do not require on-site power outage maintenance, which can improve the operation and maintenance efficiency and reduce the operation and maintenance cost.

[0014] 2. The control module and the human-machine interaction module adopt independent insulating shells and have no electrical connection. When insulation damage occurs inside the circuit breaker controller, there is no risk of electric shock to the operator.

[0015] 3. When the control module detects an abnormality in the human-machine interaction module, it can cut off the power supply to the human-machine interaction module. Therefore, when a serious fault such as a power short circuit occurs in the human-machine interaction module, the protection function of the control module can still operate normally, and the reliability is higher.

[0016] 4. When the control module cannot work, the operation and maintenance data can be directly obtained from the human-machine interaction module; when the control module is replaced, the human-machine interaction module can store the original data back to the control module without manual setting. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a principle block diagram of a specific embodiment of the circuit breaker controller of the present utility model;

[0018] Figure 2 is Figure 1 a specific structural block diagram of the circuit breaker controller shown. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The technical solution of the present utility model will be described in detail below with reference to the drawings:

[0020] Aiming at the deficiencies of the prior art, the present utility model proposes a circuit breaker controller, and a specific embodiment thereof is as Figure 1As shown, it consists of a control module and a human-machine interaction module that are independent of each other and are respectively equipped with near-field communication circuits. The control module includes a first microprocessor, a first memory, and a first near-field communication circuit. The human-machine interaction module includes a second microprocessor, a display and keys, a second memory, and a second near-field communication circuit. The control module and the human-machine interaction module are not connected by traditional contact points, connectors, etc., but instead, the control module realizes one-way power transmission to the human-machine interaction module and two-way data transmission between the control module and the human-machine interaction module through the near-field communication circuit.

[0021] The first microprocessor collects operation and maintenance data during the operation of the controller, such as the alarm records, opening records, contact wear conditions, maximum historical current and voltage of the circuit breaker, etc., and stores them in the first memory. The second microprocessor collects the protection setting parameters set by the user through the display and keyboard circuit, such as the current threshold and action time for overload protection, and stores them in the second memory. After the control module and the human-machine interaction module are connected and operate through the near-field communication circuit, the first memory synchronizes the operation and maintenance data to the second memory, and the second memory synchronizes the protection setting parameters to the first memory. The data stored in the two memories is the same after synchronization. Therefore, after the control module is separated from the human-machine interaction module, it can still execute the protection function according to the set parameters, and the human-machine interaction module can still save all data after being separated from the control module.

[0022] The operation of the first near-field communication circuit to transfer power to the second near-field communication circuit is controlled by the first microprocessor. When the first microprocessor controls the first near-field communication circuit to start power transmission, if it detects that the load exceeds the preset value, it will cut off the power transmission, so that the energy consumption and heat generation of the control module are at a reasonable level, enabling the control module to work stably for a long time. At the same time, in order to ensure that it can work automatically after replacing the human-machine interaction module, the first microprocessor will try to start power output again after a delay.

[0023] Figure 2 shows a specific structure of the circuit breaker controller, as Figure 2 shown, it includes an independent control module and a human-machine interaction module. The control module is installed in the first insulating housing, and the human-machine interaction module is installed in the second insulating housing. Power transmission and communication are carried out between the two modules through NFC near-field communication technology. There is no need to open holes at the connection of the two modules, so it has high insulation performance. The control module is generally isolated from the external power supply through a transformer. When the insulation performance of the transformer accidentally decreases, the circuit of the human-machine interaction module still has good insulation performance, and there is no risk of electric shock for users during operation.

[0024] To facilitate the removal and installation of the human-machine interaction module, a detachable fixing device is also provided on the first insulating housing and the second insulating housing, and the device can be a magnet, a buckle, a slot, etc.

[0025] As Figure 2 shown, the control module includes a first power supply circuit, a signal conditioning circuit, a first microprocessor circuit, a drive circuit, a fieldbus communication circuit, a first memory, a first NFC communication circuit, and an alarm indicator; the input end of the first power supply circuit is connected to an external auxiliary power supply, and the output power supply VCC1 supplies power to each functional circuit of the control module; the input end of the signal conditioning circuit is connected to an external current and voltage acquisition device to obtain current and voltage signals, which are sent to the first microprocessor after conditioning; the first microprocessor is the control core of the control module, responsible for current and voltage sampling calculation, protection control, and coordinating the work of each functional circuit; the control end of the drive circuit is connected to the first microprocessor, and the other end is connected to an external opening drive mechanism. When the electrical parameters such as current, voltage, frequency, and power measured by the first microprocessor exceed the set protection threshold, a low-voltage opening control signal is sent to the drive circuit, and the drive circuit converts it into a high-voltage and large-current signal to drive the external opening drive mechanism to trip the circuit breaker; one end of the fieldbus communication circuit is connected to the first microprocessor circuit, and the other end is connected to an external field communication bus, enabling the host computer to connect to the controller through the communication bus to achieve communication functions; the data stored in the first memory includes two parts. One is various protection setting parameters of the controller, and different setting values can make the circuit breaker adapt to different protection scenarios. The other is the operation and maintenance data generated during the operation of the controller, which is convenient for operators to perform on-site maintenance; the first NFC communication circuit specifically includes two parts: an NFC controller and an antenna. One end of the NFC controller is connected to the first microprocessor through a communication bus, such as an SPI communication bus, and the other end is connected to the antenna. Under the control of the first microprocessor, the NFC controller can enable the modulation function to convert electrical energy and communication signals into radio frequency signals and send them out through the antenna. A status indicator is also provided on the control module of this embodiment, which is connected to the first microprocessor. When the controller is connected to the human-machine interaction module, the status indicator does not work. When the human-machine interaction module is removed, the status indicator starts to indicate the normal operation status and alarm status of the controller (for example, green for normal operation and red for alarm status), enabling operators to directly view the operation status of the circuit breaker in the case of the absence of the unmanned aerial vehicle interaction module.

[0026] As Figure 2As shown in the figure, the human-computer interaction module includes a second NFC communication circuit, a second power supply circuit, a second microprocessor, a second memory, a display and buttons, and a USB interface; the second NFC communication circuit includes an antenna and an NFC controller. The antenna is used to receive the electrical energy and communication signals emitted by the first NFC communication circuit. After receiving the electrical energy signal, it is directly transmitted to the second power supply circuit connected thereto. The communication signal enters the NFC controller for demodulation and then is sent to the second microprocessor connected thereto through the communication bus; after obtaining the electrical energy signal from the antenna, the second power supply circuit generates the power supply VCC2 through operations such as rectification, filtering, and voltage conversion to supply power to each functional circuit in the human-computer interaction module; the second microprocessor is the control core of the human-computer interaction module. On the one hand, it communicates with the control module through the second NFC communication circuit, and on the other hand, it controls and coordinates other functional circuits connected thereto; the data stored in the second memory also includes various protection setting parameters and the operation and maintenance data generated during the operation of the controller; the display and buttons are connected to the second microprocessor and obtain various types of data from the second microprocessor for display. One type of data is the real-time operating current, voltage, frequency, etc., and the other type of data is the various protection setting parameters stored in the second memory and the operation and maintenance data generated during the operation of the controller. The operator can modify the various protection setting parameters through the buttons; in this embodiment, the human-computer interaction module is also provided with a USB interface. The power line in the USB interface is connected to the second power supply circuit, enabling the human-computer interaction module to operate independently relying on the USB power supply. The data line in the USB interface is connected to the second microprocessor, enabling devices such as a PC to directly access the human-computer interaction module and obtain various types of data in the second memory. At the same time, due to the existence of the second memory, the various protection setting parameters can be modified when the human-computer interaction module operates independently.

[0027] Since the first memory of the control module and the second memory of the human-computer interaction module both store the same data, it can be ensured that the data can be effectively retained when either party is damaged. To ensure that the control module and the human-computer interaction module can operate independently, the operation and maintenance data generated by the first microprocessor are directly stored in the first memory, and the various protection setting parameters generated by the second microprocessor are directly stored in the second memory. When the first microprocessor and the second microprocessor are both online, the first memory synchronizes the operation and maintenance data to the second memory, and the second memory synchronizes the protection setting parameters to the first memory.

[0028] To ensure that the data can be correctly synchronized when replacing the human-computer interaction module, this embodiment further improves the synchronization measures as follows:

[0029] The factory - shipped human - machine interaction module is preset so that no data is stored in the second memory. When the human - machine interaction module is powered on and running, if the second microprocessor fails to detect data in the second memory, it sends a request to the first microprocessor to completely synchronize all the data in the first memory to the second memory. When temporarily using the human - machine interaction module of other circuit breakers on - site, after the human - machine interaction module is powered on and running, if the second microprocessor detects that the operation and maintenance data in the second memory is inconsistent with the operation and maintenance data in the first memory, it sends a request to the first microprocessor to completely synchronize all the data in the first memory to the second memory. This synchronization mechanism is based on the fact that the operation and maintenance data of each circuit breaker is different. When the human - machine interaction module is removed and reinstalled on the original circuit breaker, various data stored in the original circuit breaker will not change.

[0030] During the operation of the circuit breaker, the control module may also be damaged. Generally, the protection setting values of conventional circuit breakers are stored in the control module. After replacing the control module, the protection setting values will be lost, and these setting values are often designed by the designer according to the characteristics of the system. The loss of protection setting values may cause certain difficulties for the rapid restoration of on - site power distribution.

[0031] For the above reasons, the present utility model further improves the data synchronization measures: when the human - machine interaction module is powered on and running, if the second microprocessor detects that there is data in the second memory and the operation and maintenance data in the first memory indicates that the controller is a new controller, the second microprocessor synchronizes all the data in the second memory to the first memory. Data such as the wear condition of the circuit breaker, the number of operations, and the historical operating current in the operation and maintenance data can all be used to determine whether the controller is a new controller.

[0032] Based on the above measures, users can achieve rapid replacement of the human - machine interaction module, and the protection setting parameters and operation and maintenance data can be well retained. At the same time, since the power and data are output wirelessly between the control module and the human - machine interaction module, there will be no arcing at the interface during live disassembly and installation, which can ensure the safety of the hardware and the stability of the control module operation.

[0033] To prevent power overload or short - circuit faults in the human - machine interaction module, resulting in insufficient power supply to the control module and unstable operation, in this embodiment, the operation of the first NFC communication circuit transmitting power to the second NFC communication circuit is controlled by the first microprocessor. When the first microprocessor controls the first near - field communication circuit to start power transmission, if the detected load exceeds the preset value, the power transmission is cut off, and after a delay period, an attempt is made to start the power again.

Claims

1. A circuit breaker controller, comprising a control module and a human-computer interaction module; characterized in that: The control module and the human-machine interaction module are independent of each other and are respectively configured with a near field communication circuit for realizing one-way power transmission from the control module to the human-machine interaction module and two-way data transmission between the control module and the human-machine interaction module.

2. The circuit breaker controller according to claim 1, characterized in that: The control module and the human-machine interaction module each have an independent insulating shell.

3. The circuit breaker controller according to claim 1, characterized in that: The control module and the human-computer interaction module are fixedly connected via a detachable fixing device.

4. The circuit breaker controller according to claim 1, characterized in that: The control module is provided with a status indicator light for indicating the connection status between the control module and the human-machine interaction module and the working status of the control module.

5. The circuit breaker controller according to claim 1, characterized in that: The control module and the human-machine interaction module are respectively configured with memories for storing operation and maintenance data and protection setting parameters, and the control module and the human-machine interaction module are configured to first perform data synchronization between the two memories when the signals of the two are connected.

6. The circuit breaker controller according to claim 1, characterized in that: The human-computer interaction module is provided with a USB interface.

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