Protection device and inspection system for protection device

Abstract

The present invention relates to a protection device and an inspection system for the protection device. The protection device may determine state information regarding at least one state of a system on the basis of a result obtained by detecting at least one of a voltage and a current of the system, generate display information according to the state information, and display code information on a display screen displayed to the outside according to a display setting, thereby allowing the state information to be recognized through recognition of the code information, and enabling simple and convenient acquisition of data.

Description

Protection devices and detection systems for protection devices

[0001] The present invention relates to a protection device for protecting a system and a detection system for the protection device.

[0002] The background technology of the present invention relates to a protection device for protecting a system and a detection system thereof.

[0003] In a system where various facilities are installed, external disturbances occur and affect the facilities, and various protective devices are used to protect the facilities from these external disturbances.

[0004] The protective device may be a digital device, for example an Intelligent Electronic Device (IED).

[0005] An IED (Intelligent Electronic Device) is a device that protects equipment in an electrical system. It mainly has the function of transmitting or receiving monitoring, control, measurement, protection, and interlock functions of equipment in a substation to or from the outside via communication. In the protection distribution panel industry, this is collectively called a protection relay (IED).

[0006] Meanwhile, these protective relays (IEDs) are equipped with an HMI (Human Machine Interface) terminal on the front of the main body so that the user can check or set status information and data. The general configuration of these protective relays (IEDs) is as shown in Fig. 1.

[0007] As shown in Fig. 1, the HMI (2) is located on the front of the IED body (1), and the HMI (2) displays internal data and status as information including text or images through an LCD screen.

[0008] Additionally, the user can externally check the predefined status through the LED (2-1) display, and the user can also use the Key (2-2) input to input or select data through the LCD screen.

[0009] Methods for checking data inside the IED (10) include data displayed on the LCD screen, checking data values ​​through a dedicated program in the device management communication I / F (3), and checking data values ​​through the SCADA I / F (4) using an external standard communication protocol.

[0010] In an environment where a conventional IED (10) is installed, in order for a user to check data using HMI (2), the user must find the LCD screen displaying the data he or she wants to check in front of the IED (1) and visually check the data on the corresponding screen. This is a cumbersome task for an inspector who must regularly check and record this.

[0011] It is also possible to acquire data through the device management communication I / F (3) or SCADA communication I / F (4), but this requires additional equipment to be used in front of the device during regular daily device inspection, and there is also a possibility that the device may malfunction due to an error in the user program operation during this process.

[0012] Additionally, there is a possibility that the user may misread the data values ​​during the process of visually checking them, so there is a limitation in that the accuracy of the detection cannot be guaranteed.

[0013] The present invention aims to improve the limitations of the prior art as described above.

[0014] Accordingly, the present specification seeks to provide an embodiment in which detection can be performed easily and conveniently.

[0015] In addition, we aim to provide an embodiment in which data acquisition and digitalization can be achieved without misreading.

[0016] An embodiment of the present specification for solving the above-described problem is characterized by generating and displaying information displayed on an external screen as code information recognizable by a user's terminal.

[0017] The above technical features can be applied and implemented to relays, relay detection systems, relay control systems, protection devices, protection device detection systems, protection device control systems, power meters, and power meter reading systems, and the present specification provides examples of protection devices and protection device detection systems that use the above technical features as a means for solving problems.

[0018] An embodiment of a protection device using the above technical features as a means for solving a problem includes a detection unit that detects at least one of voltage and current of a system, a control unit that determines status information on at least one status of the system based on a detection result of the detection unit and generates display information according to the status information, and a display unit that outputs the display information on a display screen displayed externally, wherein the control unit generates the display information in the form of at least one of text information and code information, and the display unit varies the output of the display information according to a display setting for text display or code display.

[0019] In an embodiment, the status information may further include information about the status of the protection device.

[0020] In an embodiment, the code information may be a QR code.

[0021] In an embodiment, the code information may be displayed on the screen of the recognition device as an image of the text information upon recognition.

[0022] In an embodiment, the code information may be displayed on the screen of the recognition device as the status information when recognized as the text information.

[0023] In an embodiment, the display unit may display the display information as text information on the display screen when the display setting is set to the text display.

[0024] In an embodiment, the display unit may display the display information as the code information on the display screen when the display setting is set to the code display.

[0025] In an embodiment, the display unit may display a button window for the display settings on the display screen, and switch the display settings to the text display or the code display in response to an operation of the button window.

[0026] In an embodiment, the display unit may display an authentication screen for an authentication process of a user who will confirm the display information before displaying the display information, and display the display information when the performance of the authentication process through the authentication screen is confirmed.

[0027] In an embodiment, the display unit may not display the display information until the authentication process is performed.

[0028] In an embodiment, the authentication screen is a screen requesting the input of a specific code, and the display unit can display the display information when the input of the specific code is confirmed on the authentication screen.

[0029] In an embodiment, the authentication screen is a screen that displays a specific code, and the display unit can display the display information when input of the specific code is confirmed in the user's recognition device.

[0030] In addition, an embodiment of a detection system of a protection device using the above technical feature as a means for solving a problem includes a protection device including a detection unit that detects at least one of voltage and current of a system, a control unit that determines status information on at least one status of the system based on a detection result of the detection unit and generates code information according to the status information, and a display unit that outputs the code information on a display screen displayed externally according to display settings, and a terminal device that recognizes the code information and displays the status information on a terminal screen displayed externally.

[0031] In an embodiment, the terminal device can recognize the code information, recognize the status information from the code information, and store the status information as data.

[0032] In an embodiment, the display unit may display an authentication screen for an authentication process of the terminal device before displaying the code information, and display the code information when the performance of the authentication process through the authentication screen is confirmed.

[0033] In an embodiment, the authentication screen is a screen requesting the input of a specific code, and the display unit can display the code information when the input of the specific code is confirmed on the authentication screen.

[0034] In an embodiment, the authentication screen is a screen that displays a specific code, and the display unit can display the code information when input of the specific code is confirmed in the terminal device.

[0035] The embodiments of the above-described protection device and the detection system of the protection device are not limited to those described above, and may include embodiments described in the specific description to be described below or embodiments that can be inferred / derived from the specific description.

[0036] According to the embodiment of the protection device and the detection system of the protection device as described above, information displayed on an external screen is generated and displayed as code information recognizable by a user's terminal, thereby enabling recognition of status information by recognition of the code information.

[0037] Accordingly, there is an effect that allows the detector to obtain data simply and conveniently.

[0038] In particular, it has the effect of making it easier to inspect equipment that cannot transmit and receive data through communication.

[0039] Additionally, it has the effect of enabling data acquisition without separate equipment or separate operation for inspection.

[0040] In addition, it has the effect of preventing misinterpretation of data, enabling accurate detection.

[0041] In addition, it has the effect of making it easy to acquire and digitize data without misreading.

[0042] The effects according to the embodiments of the above-described protection device and the detection system of the protection device are not limited to those described above, and may also include effects described in the specific description to be described below or effects that can be inferred / derived from the specific description.

[0043] Figure 1 is an example of a conventional general protection relay (IED).

[0044] Figure 2 is a configuration diagram of a protection device and a detection system of the protection device according to an embodiment.

[0045] Figure 3 is a specific example of a protection device and a detection system of the protection device according to an embodiment.

[0046] Figure 4 is an example of text information and text display.

[0047] Figure 5 is an example of code information and code display.

[0048] Figure 6 is an example of recognition of code information.

[0049] Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Regardless of the drawing numbers, identical or similar components are given the same reference numbers and redundant descriptions thereof will be omitted.

[0050] Additionally, when describing the technology disclosed in this specification, if it is determined that a detailed description of a related known technology may obscure the gist of the technology disclosed in this specification, or if a person skilled in the art can easily understand or infer the gist of the technology disclosed in this specification, a detailed description thereof will be omitted. In addition, it should be noted that the attached drawings are only intended to facilitate an easy understanding of the concept of the technology disclosed in this specification, and should not be construed as limiting the concept of the technology by the attached drawings.

[0051] First, the configuration of the protection device to which the embodiment is applied is described.

[0052] The above protection device (100), as illustrated in FIG. 2, includes a detection unit (10) that detects at least one of the voltage and current of the system, a control unit (20) that converts the detection result of the detection unit (10) into a digital value of the detection value, determines the occurrence of a disturbance in the system based on the conversion result, and generates a signal for controlling a blocking unit (CB) according to the determination result, and a display unit (30) that displays the determination result.

[0053] In the above protection device (100), the detection unit (10) may be a device that detects one or more of the voltage and current of the system that serve as the basis for the protection operation of the protection device (100).

[0054] The above detection unit (10) may include one or more devices.

[0055] For example, it may include PT and CT.

[0056] The above detection unit (10) can convert one or more of the voltage and current of the system detected by one or more of the PT and CT into a low voltage and small current signal and transmit it to the control unit (20).

[0057] In the above protection device (100), the control unit (20) may be a device that performs calculations and signal processing for performing the function of the protection device (100).

[0058] The above control unit (20) may include one or more devices.

[0059] For example, it may include an MCU (Micro Controller Unit).

[0060] The control unit (20) converts the detection result received from the detection unit (10) into a detection value of a digital signal, determines the occurrence of a disturbance in the system based on the conversion result, and generates information to be displayed through the display unit (30) and transmits the information to the display unit (30).

[0061] The above control unit (20) can control the above display unit (30).

[0062] In the above protection device (100), the display unit (30) may be a display device of the protection device (100).

[0063] The above display unit (30) may include one or more devices.

[0064] For example, it may include an LCD.

[0065] The above display unit (30) can display information received from the control unit (20) as visual information externally.

[0066] The above display unit (30) can be controlled by the control unit (20).

[0067] That is, the information display of the display unit (30) can be controlled by the control unit (20).

[0068] An embodiment of the protection device (100) including the detection unit (10), the control unit (20), and the display unit (30) may be as shown in FIG. 3.

[0069] The above protection device (100) detects at least one of the voltage and current of the system by the detection unit (10), and the control unit (20) determines status information on at least one status of the system based on the detection result of the detection unit (10), generates display information according to the status information, and the display unit (30) outputs the display information to an externally displayed display screen (OS).

[0070] That is, when the control unit (20) generates the status information and the corresponding display information based on the detection result, the protection device (100) causes the display unit (30) to display the display information on the display screen (OS).

[0071] Here, the status of the system may mean any one of the voltage, current, power, frequency, active power, reactive power, active power amount, reactive power amount, whether an accident has occurred, and the type of accident occurrence of the system.

[0072] Accordingly, the status information may include one or more pieces of information from among the voltage, current, power, frequency, active power, reactive power, active power amount, reactive power amount, whether an accident has occurred, and the type of accident that occurred of the system.

[0073] The above status information may also include information on the status of the protection device (100).

[0074] For example, it may further include one or more pieces of information from among model information, event occurrence history, installation location, and period of the above protection device (100).

[0075] The above display information may refer to data of information that the display unit (30) will display on the display screen (OS).

[0076] That is, the above display information may be data for displaying the status information on the display screen (OS).

[0077] In the above protection device (100), the control unit (20) generates the display information in the form of at least one of text information and code information, and the display unit (30) outputs the display information differently depending on the display setting for text display or code display.

[0078] Here, the display settings may be settings for the output method of the display information to be displayed on the display screen (OS).

[0079] The above display settings may be settings for outputting the display information in either the text display method or the code display method.

[0080] Accordingly, the protection device (100) displays the display information in the text display or code display manner according to the display settings on the display unit (30), and the user (detector) of the protection device (100) can check the display information for the status information in the text display or code display manner through the display screen (OS).

[0081] The above text display may be a method in which the status information is displayed in text form, as illustrated in FIG. 4.

[0082] The above text information (TI) may be data for displaying the status information in text form, as illustrated in FIG. 4.

[0083] That is, the above text information (TI) can be displayed in text form on the display screen (OS) as shown in FIG. 4.

[0084] The above code display may be a method in which an image including the status information is displayed in the form of a code, as illustrated in FIG. 5.

[0085] The above code information (CI) may be image data of a code including the status information, as illustrated in FIG. 5.

[0086] That is, the above code information (CI) can be displayed in the form of a code on the display screen (OS) as shown in FIG. 5.

[0087] The above control unit (20) can generate the text information (TI) according to the status information and generate the code information (CI) according to the text information (TI).

[0088] The above control unit (20) can generate the code information (CI) so that the text information (TI) is included in the code information (CI).

[0089] The above control unit (20) can also generate the code information (CI) so that the image of the text information (TI) is included in the code information (CI).

[0090] Accordingly, when the code information (CI) is recognized through the recognition device, the text information (TI) included in the code information (CI) or an image of the text information (TI) can be displayed on the screen of the recognition device.

[0091] The above code information (CI) may be a QR code.

[0092] The above code information (CI) can be displayed on the screen of the recognition device as an image of the above text information (TI) when recognized.

[0093] The above code information (CI) may also be displayed on the screen of the recognition device as the above status information (TI) upon recognition.

[0094] For example, as illustrated in FIG. 6, when the user's terminal device (200) recognizes the code information (CI), the text information (TI) included in the code information (CI) or an image of the text information (TI) may be displayed on the terminal screen (IS) of the terminal device (200).

[0095] In this case, the text information (TI) corresponding to the recognition result of the code information (CI) can be displayed through a recognition window (IR) popped up at the bottom of the terminal screen (IS).

[0096] Here, the recognition window (IR) may be a window in which the recognition result of the code information (CI) is displayed.

[0097] The above display unit (30) can display the display information as the text information (TI) on the display screen (OS) as shown in FIG. 4 when the display setting is set to the text display.

[0098] The above display unit (30) can display the display information as the code information (CI) on the display screen (OS) as shown in FIG. 5 when the display setting is set to the code display.

[0099] Meanwhile, the display unit (30), as shown in FIGS. 4 and 5, displays a button window (IC) for the display settings on the display screen (OS), and can switch the display settings to the text display or the code display in response to the operation of the button window (IC).

[0100] For example, when the button window (IC) is touched or selected by the user of the protection device (100), the display setting may be switched from the current method to another method.

[0101] Accordingly, the user of the protection device (100) can select the display method of the display information as the text display or the code display by operating the button window (IC).

[0102] The above button window (IC) can be displayed as a button to switch to the code display when the display setting is the text display as shown in Fig. 4.

[0103] That is, when the button window (IC) is operated while the display setting is the text display as shown in Fig. 4, it can be switched to the code display as shown in Fig. 5.

[0104] The above button window (IC) can be displayed as a button to switch to the text display when the display setting is the code display as shown in Fig. 5.

[0105] That is, when the button window (IC) is operated while the display setting is the code display as shown in Fig. 5, it can be switched to the text display as shown in Fig. 4.

[0106] In this way, by displaying the status information as the text information (TI) or the code information (CI) of the protection device (100), the user of the protection device (100) can selectively check the status information when detecting the protection device (100).

[0107] Accordingly, by the user recognizing the code information (CI) using the terminal device, the confirmation and acquisition of the status information can be performed accurately and conveniently without misreading.

[0108] In particular, the embodiment of the protection device (100) can be usefully applied in cases where manual inspection by the user is required, such as when the protection device is installed in a special area, has no communication, or requires regular visual inspection.

[0109] Meanwhile, the protection device (100) may enable an authentication process for a user who wishes to confirm the display information to be performed before displaying the display information.

[0110] Here, the above authentication process may be a process in which authentication of a user who is permitted to confirm the above display information is performed.

[0111] Accordingly, the protection device (100) can identify users who are authorized to confirm the display information and provide the display information only to identified users.

[0112] The above display unit (30) may display an authentication screen for the user's authentication process before displaying the display information, and may display the display information when the authentication process is confirmed to have been performed through the authentication screen.

[0113] The above display unit (30) can display the display information if the authentication process through the authentication screen is not confirmed before displaying the display information.

[0114] That is, the protection device (100) may display the display information when the performance of the authentication process is confirmed, and may not display the display information when the performance of the authentication process is not confirmed.

[0115] The above display unit (30) may not display the display information until the authentication process is performed.

[0116] For example, a portion of the display screen where the display information is displayed may be blinded until the above authentication process is performed.

[0117] The above authentication screen may be a screen that requests the input of a specific code.

[0118] Here, the specific code may be a code that can identify the user.

[0119] In this case, the display unit (30) can display the display information when the input of the specific code is confirmed on the authentication screen.

[0120] The above display unit (30) can display the display information by confirming that the authentication process has been performed when the code entered on the authentication screen matches the specific code after displaying the authentication screen.

[0121] In this case, the control unit (20) can check whether the code entered in the authentication screen matches the specific code, and if the entered code matches the specific code, it can be confirmed that the authentication process has been performed, and if the entered code does not match the specific code, it can be confirmed that the authentication process has not been performed.

[0122] The above control unit (20) can control the display unit (30) to display display information when it is confirmed that the above authentication process has been performed.

[0123] Accordingly, the display unit (30) may display the display information when the specific code is entered in the authentication screen.

[0124] In addition, the display unit (30) may not display the display information if a code other than the specific code is entered on the authentication screen.

[0125] The above authentication screen may also be a screen that displays a specific code.

[0126] In this case, the display unit (30) can display the display information when the input of the specific code is confirmed in the user's recognition device.

[0127] The above display unit (30) can display the display information by confirming that the authentication process has been performed when the code entered into the recognition device matches the specific code after displaying the authentication screen.

[0128] In this case, the recognition device can check whether the input code matches the specific code, and if the input code matches the specific code, it can confirm that the authentication process has been performed, and if the input code does not match the specific code, it can confirm that the authentication process has not been performed.

[0129] When the above recognition device confirms that the authentication process has been performed, it transmits the confirmation result to the control unit (20), and the control unit (20) can control the display unit (30) to display the display information according to the confirmation result.

[0130] Accordingly, the display unit (30) can display the display information when the specific code is input from the recognition device.

[0131] In addition, the display unit (30) may not display the display information when a code other than the specific code is input from the recognition device.

[0132] An embodiment of a detection system (1000) of a protection device including the above-described protection device (100) (hereinafter referred to as a detection system) includes the protection device (100) and a terminal device (200), as shown in FIG. 2.

[0133] In the above detection system (1000), the protection device (100) detects at least one of the voltage and current of the system by the detection unit (10), the control unit (20) determines status information on at least one status of the system based on the detection result of the detection unit (10), generates the code information (CI) according to the status information, and the display unit (30) outputs the code information (CI) to the display screen (OS) displayed externally according to the display settings.

[0134] The above protection device (100) can be configured so that the control unit (20) generates the code information (CI) as shown in FIG. 5, and the display unit (30) displays the code information (CI) on the display screen (OS) as shown in FIG. 5.

[0135] In this case, the button window (IC) for switching the display settings may be displayed on the display screen (OS).

[0136] When the above button window (IC) is operated, the display setting is switched to the text mode, so that the display unit (30) can display the text information (TI) on the display screen (OS) as shown in FIG. 4.

[0137] In this case, the button window (IC) for switching the display settings may be displayed on the display screen (OS).

[0138] In the above detection system (1000), the terminal device (200) recognizes the code information (CI) and displays the status information on the terminal screen (IS) displayed externally.

[0139] The above terminal device (200) may be a terminal of a user of the above protection device (100).

[0140] The terminal device (200) may be the user's mobile phone, a dedicated inspection terminal, a tablet, or a camera.

[0141] The terminal device (200) can recognize the code information (CI) displayed on the display screen (OS) as illustrated in FIG. 3, and recognize the status information from the code information (CI).

[0142] When the terminal device (200) recognizes the code information (CI) on the terminal screen (IS) as shown in FIG. 6, a recognition window (IR) displaying the recognition result pops up on the terminal screen (IS), and the status information included in the code information (CI) can be displayed in the form of text information (TI) on the recognition window (IR).

[0143] The terminal device (200) can recognize the status information from the code information (CI) and store the status information in data format.

[0144] Accordingly, acquisition of the status information of the protection device (100) can be accomplished through recognition of the code information (CI).

[0145] Meanwhile, the above detection system (1000) may perform an authentication process of the terminal device (200) that recognizes the code information (CI) before displaying the code information (CI).

[0146] Here, the above authentication process may be a process in which the terminal device (200) that is permitted to recognize the code information (CI) is authenticated.

[0147] Accordingly, the detection system (1000) can identify a user who is authorized to recognize the code information (CI) and provide the code information (CI) only to the identified user.

[0148] The above display unit (30) may display an authentication screen for the authentication process of the terminal device (200) before displaying the code information (CI), and may display the code information (CI) when the performance of the authentication process through the authentication screen is confirmed.

[0149] The above display unit (30) can display the code information (CI) if the performance of the authentication process through the authentication screen is not confirmed before displaying the display information.

[0150] That is, the protection device (100) may display the code information (CI) when the performance of the authentication process is confirmed, and may not display the code information (CI) when the performance of the authentication process is not confirmed.

[0151] The above display unit (30) may not display the code information (CI) until the authentication process is performed.

[0152] For example, a portion of the display screen where the code information (CI) is displayed may be blinded until the above authentication process is performed.

[0153] The above authentication screen is a screen that requests the input of a specific code, and the display unit (30) can display the code information (CI) when the input of the specific code is confirmed on the authentication screen.

[0154] The above display unit (30) can display the code information (CI) after displaying the authentication screen, if the code entered in the authentication screen matches the specific code, the execution of the authentication process is confirmed.

[0155] In this case, the control unit (20) can check whether the code entered in the authentication screen matches the specific code, and if the entered code matches the specific code, it can be confirmed that the authentication process has been performed, and if the entered code does not match the specific code, it can be confirmed that the authentication process has not been performed.

[0156] The above control unit (20) can control the display unit (30) to display the code information (CI) when it is confirmed that the above authentication process has been performed.

[0157] Accordingly, the display unit (30) may display the code information (CI) when the specific code is entered in the authentication screen.

[0158] In addition, the display unit (30) may not display the code information (CI) if a code other than the specific code is entered on the authentication screen.

[0159] In addition, the authentication screen is a screen that displays a specific code, and the display unit (30) can display the code information (CI) when the input of the specific code is confirmed in the terminal device (200).

[0160] The above display unit (30) can display the code information (CI) by confirming the execution of the authentication process when the code entered into the terminal device (200) matches the specific code after displaying the authentication screen.

[0161] In this case, the terminal device (200) can check whether the input code matches the specific code, and if the input code matches the specific code, it can be confirmed that the authentication process has been performed, and if the input code does not match the specific code, it can be confirmed that the authentication process has not been performed.

[0162] When the terminal device (200) confirms that the authentication process has been performed, it transmits the confirmation result to the control unit (20), and the control unit (20) can control the display unit (30) to display the code information (CI) according to the confirmation result.

[0163] Accordingly, the display unit (30) may display the code information (CI) when the specific code is input in the terminal device (200).

[0164] In addition, the display unit (30) may not display the code information (CI) when a code other than the specific code is input from the terminal device (200).

[0165] By displaying the code information (CI) only when the above authentication process is confirmed to have been performed, the status information can be provided only to authorized users (detectors).

[0166] That is, the security of the above protection device (100) can be increased.

[0167] Although embodiments of the protection device and the detection system of the protection device have been described so far, the described embodiments can be modified in various ways without departing from the scope of the present invention, and the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims described below but also by equivalents of the claims.

[0168] [Explanation of symbols]

[0169] 10: Detection unit 20: Control unit

[0170] 30: Display 100: Protective device

[0171] 200: Terminal device 1000: Inspection system

Claims

1. A detection unit that detects one or more of the voltage and current of the system; A control unit that determines status information on one or more states of the system based on the detection results of the detection unit and generates display information according to the status information; and A display unit that outputs the above display information on a display screen displayed externally. Including, The above control unit, Generate the above display information in one or more formats of text information and code information, The above display part, A protection device characterized in that the output of the display information is different depending on the display settings for text display or code display.

2. In paragraph 1, The above status information is, A protection device characterized in that it further includes information on the status of the protection device.

3. In paragraph 1, The above code information is, A protective device characterized by a QR code.

4. In paragraph 3, The above code information is, A protection device characterized in that, upon recognition, an image of the above text information is displayed on the screen of the recognition device.

5. In paragraph 3, The above code information is, A protection device characterized in that, upon recognition, the status information is displayed on the screen of the recognition device as text information.

6. In paragraph 1, The above display part, If the above display settings are set to the above text display, A protection device characterized in that the display information is displayed as text information on the display screen.

7. In paragraph 1, The above display part, If the above display settings are set to the above code display, A protection device characterized in that the display information is displayed as the code information on the display screen.

8. In paragraph 1, The above display part, A protection device characterized in that it displays a button window for the display settings on the display screen, and switches the display settings to the text display or the code display in response to an operation of the button window.

9. In paragraph 1, The above display part, A protection device characterized in that, before displaying the above display information, an authentication screen is displayed for the authentication process of a user who confirms the above display information, and when the performance of the authentication process through the authentication screen is confirmed, the display information is displayed.

10. In paragraph 9, The above display part, A protection device characterized in that the display information is not displayed until the above authentication process is performed.

11. In paragraph 9, The above authentication screen is, This is a screen that asks you to enter a specific code. The above display part, A protection device characterized in that it displays the display information when the input of the specific code is confirmed in the above authentication screen.

12. In paragraph 9, The above authentication screen is, This is a screen that displays a specific code, The above display part, A protection device characterized in that it displays the display information when the input of the specific code is confirmed in the recognition device of the user.

13. A detection unit that detects one or more of the voltage and current of the system; A control unit that determines status information on one or more states of the system based on the detection result of the detection unit and generates code information according to the status information; and A display unit that outputs the above code information on an external display screen according to the display settings. a protective device including; and A terminal device that recognizes the above code information and displays the above status information on an externally displayed terminal screen. A detection system for a protection device, characterized in that it includes:

14. In paragraph 13, The above terminal device, A detection system for a protection device characterized in that it recognizes the above code information, recognizes the status information from the code information, and stores the status information as data.

15. In paragraph 13, The above display part, A detection system for a protection device characterized in that, before displaying the above code information, an authentication screen for the authentication process of the terminal device is displayed, and when the performance of the authentication process through the authentication screen is confirmed, the code information is displayed.

16. In paragraph 15, The above authentication screen is, This is a screen that asks you to enter a specific code. The above display part, A detection system for a protection device characterized in that the code information is displayed when the input of the specific code is confirmed on the authentication screen.

17. In paragraph 15, The above authentication screen is, This is a screen that displays a specific code, The above display part, A detection system for a protection device characterized in that when input of the specific code is confirmed in the terminal device, the code information is displayed.

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