JP7511982B2 - Power distribution equipment survey system - Google Patents

Description

The present invention relates to a power distribution equipment inspection system.

Once installed, distribution boards will need to be replaced after extended use. When updating distribution boards, knowledgeable personnel would check the information on the existing distribution boards on-site and select the product. Specifically, as described in Patent Documents 1 and 2, the experts would check the model and ratings displayed on the nameplates on the surface of existing circuit breakers and other devices to select replaceable equipment.

JP 2010-61830 A JP 2000-188054 A

If an expert with specialized knowledge were to go to the site and select the equipment to be replaced, the burden in terms of labor costs and selection time would be large.

The inventor of this case has thoroughly investigated this issue and attempted to find a solution. The problem that this invention aims to solve is to enable knowledgeable personnel to select replaceable power distribution equipment without having to go to the site to check the existing power distribution equipment.

To solve the above problem, a power distribution equipment inspection system is provided that includes an image input means for inputting an image of a power distribution equipment, a character reading means for reading characters displayed in the image, a database for storing character combination information and equipment specification data, a database communication means for communicating with the database regarding the character information, a grouping means for grouping the character information from the character information and the character combination information in the database, and an equipment identification means for identifying a power distribution equipment from the grouped character information and the equipment specification data in the database.

It is also preferable to have a dimension calculation means capable of calculating the dimensions, and to configure the dimension calculation means to be able to calculate the dimensions of the housing using image information of the distribution board housing input by the image input means.

It is also preferable that the dimension calculation means is configured to be capable of calculating the dimensions of the housing using the dimensions of the power distribution equipment attached to the housing, image information of the external shape of the power distribution equipment attached to the housing, and image information of the external shape of the housing.

It is also preferable that the configuration includes an equipment selection means that can select replaceable power distribution equipment from the information on the power distribution equipment identified by the equipment identification means and the equipment specification data in the database.

It is also preferable that the grouping means is capable of grouping the character information in the image by comparing it with character combination information related to the model of the power distribution equipment stored in the database, and the equipment identification means is capable of identifying the power distribution equipment by referring to the model information of the power distribution equipment in the database that matches the character information grouped by the grouping means.

It is also preferable that the grouping means is capable of grouping characters in the image using character combination information related to at least one of the rated current, rated sensitivity current, and rated non-operating current stored in the database, and the device identification means is capable of identifying the power distribution device by referring to a combination of device model information in the database that matches the character information grouped by the grouping means and at least one of the information on the rated current, rated sensitivity current, and rated non-operating current.

The grouping means is preferably configured to be capable of grouping designs or character combinations in the image using design or character combination information recognizable by the manufacturer stored in the database, and to group character combinations in the image using character combination information relating to at least one of the rated current, rated sensitivity current, and rated non-operating current stored in the database, and the device identification means is preferably configured to be capable of identifying power distribution devices by referring to a combination of information relating to the manufacturer identifiable from the design or character information grouped by the grouping means and at least one of the rated current, rated sensitivity current, and rated non-operating current.

It is also preferable to have a configuration that includes a breaker determination means that determines the power distribution device with the largest rated current among the multiple identified power distribution devices as the main breaker and determines the other power distribution devices as branch breakers.

It is also preferable to have a configuration that includes a breaker determination means that determines the only distribution device that has a neutral phase loss protection function or a ground fault interruption function as a main breaker and determines the other distribution devices as branch breakers.

It is also preferable that the configuration include an additional function suggestion means for suggesting additional functions to the power distribution equipment selected by the equipment selection means.

This invention makes it possible for knowledgeable personnel to select replaceable power distribution equipment without having to go to the site to check the existing power distribution equipment.

1 is a flow chart showing an example of a flow of using a survey system in an embodiment. FIG. 2 is a front view of a distribution board with a protective plate attached. 3 is a front view showing a state in which a protective plate of the distribution board shown in FIG. 2 is removed. FIG. FIG. 2 is a diagram showing an example of a nameplate provided on a main breaker. FIG. 5 is a diagram showing some of the parts shown in FIG. 4 grouped together. 1 is a flow chart showing an example of a flow of identifying a power distribution device in an investigation system. FIG. 3 is a front view of a distribution board replacing the distribution board shown in FIG. 8 is a front view showing a state in which a protective plate of the distribution board shown in FIG. 7 is removed. FIG. 2 is a front view of an example of a breaker. FIG. 2 is a diagram showing an example of a nameplate provided on a breaker. FIG. 2 is a front view of an example of a breaker.

The following is an embodiment of the invention. The power distribution equipment inspection system of this embodiment includes an image input means for inputting an image of the power distribution equipment, a character reading means for reading characters displayed in the image, a database for storing character combination information and equipment specification data, a database communication means for communicating with the database regarding the character information, a grouping means for grouping the character information from the character information and the character combination information in the database, and an equipment identification means for identifying power distribution equipment from the grouped character information and the equipment specification data in the database. This makes it possible for an expert to select replaceable power distribution equipment without having to go to the site to check the existing power distribution equipment.

The distribution equipment to be surveyed may be any equipment used for power distribution, including a distribution switchboard, and also equipment attached to a distribution switchboard for use in power distribution. Typical examples include the main breaker 11 and the branch breaker 12, which are distribution equipment. The distribution switchboard may or may not be case-shaped. In the embodiment, the main breaker 11 and other components are attached inside a case-shaped distribution switchboard. The concept of a distribution switchboard includes both the distribution board 10 and a switchboard.

An example of identifying power distribution equipment will be described with reference to the flow shown in FIG. 1. In this example, as can be understood from the examples shown in FIG. 2 and FIG. 3, the main breaker 11 and branch breaker 12 are installed in the housing of an existing distribution board 10 equipped with a protective plate 13. First, someone takes a picture of the existing power distribution equipment at the site where it is installed. Then, information on the image obtained by taking the picture is input to an image input means (ST001). For example, a picture of the distribution board (housing + internal equipment) is taken and input to the power distribution equipment investigation system. Note that the picture may be taken to obtain a still image or a video, but the following description will be given assuming that a still image is obtained by taking a picture.

At this time, as shown in Figure 2, a photograph of the power distribution equipment installed inside with the protective plate 13 remaining may be taken, and the result may be input to the image input means. Only a qualified technician can remove the protective plate 13, but if the information obtained by photographing with the protective plate 13 remaining can be used, even those without special qualifications can obtain the necessary information, which is highly convenient. Note that removal of the protective plate 13 must be performed by a qualified technician, but as shown in Figure 3, it is also possible to take a photograph without the protective plate 13.

Basically, it is preferable for the photograph to be taken directly in front of the distribution board. However, if the information can be converted using image analysis functions to be equivalent to that obtained when photographed from directly in front, information obtained by photographing from an oblique angle can also be used. It is preferable for the photograph to show both the exterior shape of the casing and the text information of the internal devices, but it is also possible to photograph the exterior shape of the casing and the text information of the internal devices in separate photographs.

The input image of the existing power distribution equipment is used to read character information using a character reading means such as optical character recognition (OCR) (ST002). The read character information is sent to the server together with character position information.

The read character information is grouped by its meaning using a grouping means (ST003). Typically, it is compared with character combination information, which is a plurality of character combination information, and grouped. For example, when a portion such as that shown in FIG. 4 is obtained as image information by photographing, the grouped portion is the portion enclosed in a box in FIG. 5.

For example, grouping is performed by checking whether character information representing a model, etc., is present in the character information read by the character reading means. For example, if a specific combination of letters and numbers representing a model is found, the character information is treated as one group.

Similarly, if text information such as "rated current 50A" or "50A" is identified, which indicates the rated current, the text information is treated as one group, and if text information such as "rated sensitivity current 30mA" which indicates the rated sensitivity current, "rated non-operating current 15mA" which indicates the rated non-operating current, or "high-speed type" or "time-delay type" which indicates the interruption time is identified, the text information is treated as one group.

The combinations of characters stored in the database can be any combination, but in any case, the system searches for and groups those that can be grouped based on character information read by OCR, etc.

Then, the database record information is referenced for data that matches the grouped character information (ST004).

The existing distribution equipment is identified from the grouped character information and the recorded information in the database (ST005). At this time, the distribution equipment is identified, for example, according to the flow shown in FIG. 6. In this example, the model is read (ST101). As a result, it is determined whether it is possible to identify the existing distribution equipment (ST102). If it is possible to do so, it is considered that the distribution equipment has been identified (ST114). The model is usually written as a combination of letters and numbers (e.g., "GK58N"). Identifying distribution equipment means determining information such as the model, manufacturer name, equipment name, maximum rated current, rated sensitivity current, distribution method, number of poles and elements, supported frequency, rated breaking capacity, breaking time, and whether or not it has a single-phase neutral wire open-phase protection function.

If it is not possible to determine in ST102 that the existing distribution equipment can be identified, the rated current (the input current value of an electric device such as an electric motor, declared by the manufacturer; this is the current value that can be safely passed during use) is read (ST103). As a result, it is determined whether it is possible to identify the existing distribution equipment (ST104).

In the same way, the system tries to identify existing power distribution equipment using various information such as the "rated sensitivity current," which is the leakage current value at which an earth leakage circuit breaker or earth leakage relay will always trip due to an earth leakage current; the "rated non-operating current," which is the current value (usually half the rated sensitivity current) at which an earth leakage current or leakage current will not cause an earth leakage trip; the "interrupting time," such as "high-speed type (earth leakage tripping time at rated sensitivity current is within 0.1 seconds)" or "time-delay type (earth leakage tripping time at rated sensitivity current is more than 0.1 seconds and within 2 seconds)," and the design or characters (mark such as a trademark) that indicate the manufacturer (manufacturer name). If the existing power distribution equipment cannot be identified even after using all the information required for the judgment that has been set in advance, an error judgment is made (ST113). When ST113 or ST114 is reached, the series of judgment operations ends.

Since it is often possible to determine the specifications of power distribution equipment based on the model alone, it is preferable that the grouping means be capable of grouping the character information in the image by comparing it with character combination information related to the model of the power distribution equipment stored in the database, and that the equipment identification means be configured to be able to identify the power distribution equipment by referencing model information of the power distribution equipment in the database that matches the character information grouped by the grouping means. This makes it possible to identify the power distribution equipment efficiently. Furthermore, when power distribution equipment is identified based on the model alone, the amount of data stored in the database can be minimized.

The grouping means is preferably configured to be capable of grouping characters in the image using character combination information relating to at least one of the rated current, rated sensitivity current, and rated non-operating current stored in the database, and the device identification means is preferably configured to be capable of identifying the power distribution device by referring to a combination of device model information in the database that matches the character information grouped by the grouping means and at least one of the information on the rated current, rated sensitivity current, and rated non-operating current. In cases where the character information relating to the model is unclear or where multiple options remain with only the model information, the power distribution device can be accurately identified.

Incidentally, if the model cannot be read in ST101, the power distribution equipment may be identified by combining "manufacturer information" with "at least one of the rated current, rated sensitivity current, rated non-operating current, and interruption time."

In this case, it is preferable that the grouping means is capable of grouping the design or character combinations in the image using "design or character combination information recognizable by the manufacturer" stored in the database, and is also capable of grouping character combinations in the image using "character combination information relating to at least one of rated current, rated sensitivity current, and rated non-operating current" stored in the database, and the device identification means is capable of identifying the power distribution device by referring to a combination of "information relating to the manufacturer" that can be identified from the design or character information grouped by the grouping means and "information on at least one of rated current, rated sensitivity current, and rated non-operating current." In this way, it is possible to identify the power distribution device even if the model cannot be read.

The identification of the power distribution equipment in ST005 does not have to be as shown in the example in FIG. 6. For example, if the power distribution equipment cannot be identified by the model alone, the power distribution equipment may be identified by combining it with other judgment elements. Specifically, a combination such as "model" + "rated current" + "rated sensitivity current" can be exemplified. In addition, in the example shown in FIG. 6, the judgment elements are checked in order, but instead of such a mode, multiple judgment elements may be judged simultaneously to identify the power distribution equipment.

In the example shown in FIG. 1, the process splits into two after ST005. Here, the process is divided into a case where the weight is placed mainly on the performance of the equipment to be replaced with the existing distribution equipment (ST006), such as the selection of the main breaker 11 or the branch breaker 12, and a case where the weight is placed mainly on the dimensions of the equipment, such as the selection of the housing of the distribution board 10 (ST009). Note that after ST005, the process may proceed only to ST006 or only to ST009, or to both.

In ST006, a power distribution device that can replace the power distribution device identified by the device identification means is selected. Basically, a device with the same specifications (rated current, rated sensitivity current, etc.) is selected. In this case, it may be difficult to obtain the identified type (model, etc.) of power distribution device because it is an old model. To be able to deal with such a situation, it is preferable to be able to select a device with specifications that can achieve equivalent performance from other types of power distribution device. If there is no device with the same specifications, a device with specifications that can satisfy the existing specifications but are not excessive is selected.

In addition, it is preferable to provide a configuration including an additional function suggestion means for suggesting additional functions to the power distribution equipment selected by the equipment selection means. By automatically suggesting functions that can be added to the selected equipment, it is possible to prevent overlooking of suggestions. For example, since the regulations regarding power distribution equipment when an existing distribution board was installed may differ from the current regulations, it is also possible to suggest adding additional functions to make it applicable to the current regulations. The proposed additional functions may be of any type, but typical examples include a seismic sensor, a discharge detection device, a leakage current detection device, a neutral phase loss protection device, an SPD, and a current/power monitoring device.

For example, if you proceed to ST006, you can select the performance of the breakers, but you have not determined how each breaker is used (whether it is used as a main breaker 11 or a branch breaker 12). Therefore, you have to determine which breaker is playing the role of the main breaker 11 and which breaker is playing the role of the branch breaker 12 (ST007).

In ST007, for example, the power distribution device with the largest rated current among the identified multiple power distribution devices is determined to be the main breaker 11, and the other power distribution devices are determined to be branch breakers 12. In this way, the main breaker 11 and the branch breaker 12 can be identified from the text information. In addition, wiring information for connecting the branch breaker 12 to the load side of the main breaker 11 can also be known.

The method of determining the positioning of the breaker does not, of course, need to be limited to this example; for example, the only power distribution device equipped with a neutral phase loss protection function or a ground fault interruption function may be determined to be the main breaker 11, and the other power distribution devices may be determined to be branch breakers 12. Even if such a configuration is possible, the main breaker 11 and branch breaker 12 can still be identified from the text information.

In this flow, if the role of each breaker can be determined, it is possible to estimate how they are electrically connected, so a wiring determination is made (ST008). In this way, a distribution board 10 system equipped with a main breaker 11 and branch breakers 12 can be proposed to the customer.

In this flow, after ST007, you can proceed to either ST008 or ST010, which will be described later, but which way to proceed can be determined depending on the situation. For example, if you proceed to both ST006 and ST009 after ST005, and the external shapes of all the power distribution equipment can be grasped from the image (such as when there is no protective plate 13), you can proceed only from ST007 to ST008. If ST008 is not necessary, such as when automatic wiring determination is not necessary, you can proceed only to ST010. An example of proceeding to both ST008 and ST010 will be described later.

In this embodiment, in the wiring determination of ST008, the wiring is automatically determined based on the relationship between the main breaker 11 and the branch breaker 12. At this time, the branch breaker 12 is connected to the secondary side of the main breaker 11. The column, etc., of the branch breakers 12 is determined based on their horizontal and vertical positional relationship, as represented by the positional relationship on the x-axis and y-axis.

Dimensional information may be required to select the distribution equipment to be replaced by the equipment selection means. If there is a distribution equipment whose dimensions can be identified among the photographed distribution equipment, the dimensions of the other distribution equipment may be known based on the dimensions of that distribution equipment and the image information. ST009 and onwards show an example of how to select a housing that is the distribution equipment to be replaced in this way. In this example, since the existing equipment has been identified in ST005, it is possible to identify the dimensions of the identified distribution equipment (ST009). In this example, dimensional (x, y) information of the identified distribution equipment can be obtained from information stored in the database.

For example, let us assume that the main breaker 11 is such a distribution device. As can be seen from FIG. 2 and FIG. 3, the width of the main breaker 11 exposed from the housing is generally equal to the width of the main breaker 11 itself. Therefore, if a photograph is taken from the front so that the entire housing and the exposed part of the main breaker 11 are photographed, the width of the housing can be determined by multiplying the data on the width of the main breaker 11 by the ratio of the width of the main breaker 11 to the width of the housing. In addition, since the ratio of the width and length of the housing can be determined from the image, the length of the housing can also be determined. In this way, the dimensions identified in ST009 are applied to the images of the distribution device and other distribution devices (ST010), and the values are applied to the criteria for determining the dimensions of the other distribution devices (ST011), and a housing to replace the existing housing is selected based on the dimensions of the existing housing obtained as a result (ST012).

In this embodiment, in ST010, the area of the identified power distribution device that appears in the image is determined using an image recognition function, and the width A(x) of the power distribution device is identified. The width can be identified from the direction in which the recognized characters are arranged.

The distribution board 10 of the embodiment is provided with a protective plate 13 that protects the conductive parts from the outside. When covered with the protective plate 13, it may not be possible to grasp the external shape on the image, as in the case of the branch breaker 12 shown in FIG. 2, but in the majority of cases, the width A(x) of the main breaker 11 is approximately the same as the width of the main breaker 11 itself. For this reason, in the embodiment, the width A(x) of the main breaker 11 visible on the image is set as a specific object and recognized as the external shape. In this way, the dimensions can be specified within the range of work that anyone can perform, making it easy to use. Of course, if a qualified person is working, it is preferable to take a photograph with the protective plate 13 removed as shown in FIG. 3 to make the external shape of the distribution equipment clearer.

In the embodiment, ST010 requires information on the main breaker 11. This flow makes use of the fact that ST007 allows the main breaker 11 to be identified from among the power distribution equipment. Specifically, for the power distribution equipment determined to be the main breaker 11 in ST007, the width of the power distribution equipment can be determined by referring to dimensional information from the information in the database, and by applying this information to an image, the relationship with the actual dimensions of the image can be derived. In this way, even if information is provided from ST007 to be used in ST010, it is possible to proceed to ST008 after ST007. Since ST008 and ST010 each use the information used in ST007 for different purposes, it is sufficient to proceed to the appropriate step as necessary.

In the embodiment of ST011 performed after ST010, the area of the housing shown in the image is determined by an image recognition function, and the width B(x) and height C(y) on the image are specified. The dimensions of the housing are then derived from the information on the outer shape image of the power distribution device to which the dimensions determined in ST010 are applied and the information on the outer shape image of the housing. A more specific example is described below. If the ratio of the width A(x) of the power distribution device to the width B(x) of the housing on the image is 1:10, and it is known that the width A(x) of the power distribution device is 7 cm, the width B(x) of the housing can be derived as 7 cm x 10, or 70 cm. If the aspect ratio of the housing is 1:2 from the image, the height C(y) of the housing can be derived as 70 cm divided by 2, or 35 cm.

To make this possible, it is preferable to have a dimension calculation means capable of calculating dimensions, and to configure the dimension calculation means to be able to calculate the dimensions of the housing using image information of the housing of the distribution board input by the image input means. This makes it possible to easily determine the size of the installed housing. It is preferable that the dimension calculation means is configured to be able to calculate the dimensions of the housing using the dimensions of the distribution equipment attached to the housing, image information of the external shape of the distribution equipment attached to the housing, and image information of the external shape of the housing.

In selecting a housing in ST012, a housing with dimensions equal to or larger than the dimensions of the housing determined in ST011 is basically selected. It is also possible to select a housing that avoids obstacles around the housing. In this case, it is preferable to determine the obstacles from the photographic information and select a housing that can avoid the obstacles. In this embodiment, a housing as shown in Figures 7 and 8 was selected.

It is also preferable to have a configuration including an equipment selection means that can select a distribution equipment that can replace the identified distribution equipment using the information on the distribution equipment identified by the equipment identification means and the equipment specification data in the database. In this way, even a non-expert person can automatically select a distribution equipment that can be replaced. In this case, it is preferable to be able to select a distribution equipment of a different type from the identified type (model, etc.) of distribution equipment that has specifications that can achieve equivalent performance. The information on the distribution equipment refers to information such as the model, manufacturer name, equipment name, maximum rated current, rated sensitivity current, distribution method, number of poles/number of elements, compatible frequency, rated breaking capacity, breaking time, and the presence or absence of a single-phase neutral wire open-phase protection function.

In the above example, the case is selected, but it is of course not limited to the selection of the case. For example, this system may be used to select a breaker to be updated. As can be seen from Figures 4, 9, 10, and 11, the character groups used for selection vary depending on the distribution device, with respect to position, character shape, and amount of information obtained. It is preferable to use a system that can accommodate these differences. However, even if some cannot be accommodated, the system can be used to determine whether or not an expert needs to visit the site, thereby reducing the burden of labor costs and selection time.

Although the present invention has been described above using the embodiments as examples, the present invention is not limited to the above embodiments and can be implemented in various forms. For example, power distribution equipment is not limited to breakers and distribution boards as long as it is equipment used for power distribution. Other examples of power distribution equipment include earthquake sensors, discharge detectors, leakage detectors, neutral phase loss protection devices, SPDs, and current/power monitoring devices.

The elements used for the judgment do not have to be those described in the embodiment. For example, "shock wave non-operating type (a function that prevents the earth leakage breaker from misoperating by recognizing a lightning surge as an earth leakage)", "rated interrupting capacity (I.C) (e.g. 5kA (rated interrupting capacity) = the current that can be interrupted without hindrance in the event of a large current generated by a short circuit accident, without causing the breaker contacts to melt or break)", "device name (e.g. earth leakage breaker)", "power distribution method (e.g. 1φ3W = single-phase three-wire), "number of poles, number of elements (e.g. 3P2E = 3 poles, 2 elements, number of poles = number of electrodes)", etc. It can also be "Number of elements = number of terminals that can detect overcurrent")," "Maximum rated current (The physical external dimensions of the circuit breaker are common to a certain range of rated currents, and the current equivalent to the maximum rated current of the group is expressed in amperes. A certain type of product may have the same external dimensions and a rated current of 30, 40, or 50A, so the maximum rated current is 50AF)," "Compatible frequency (e.g. 50/60Hz)," "Single-phase neutral conductor loss protection (In single-phase three-wire wiring, if the neutral conductor is lost phase, the load voltage becomes unbalanced, and abnormal voltage is applied to 100V equipment, which may cause a burnout accident. This function shuts off the circuit to avoid this.)."

In this embodiment, only x and y are considered as directional axes, but the depth width (z) may also be determined in a similar manner. In that case, a photograph must also be taken in the depth direction of the distribution board.

The calculation method of the dimension calculation means is not limited to that described in the embodiment. For example, it may be a system that can automatically calculate the dimensions of the housing using a range finder or the like.

The database communication means may be for external communication with an external cloud or the like, or for internal communication with a database within the app, etc.

10 Distribution board 11 Main breaker 12 Branch breaker 13 Protective plate

Claims (9)

an image input means for inputting an image of the power distribution device;
A character reading means for reading characters displayed in an image;
A database for storing character combination information and device specification data;
A database communication means for communicating with a database regarding character information;
a grouping means for grouping character information based on the character information and character combination information in a database;
an equipment identification means for identifying a power distribution equipment based on the grouped character information and the equipment specification data in the database;
an additional function suggestion means for suggesting the addition of an addable function to the selected power distribution device so as to enable the device to comply with the regulation when the selected power distribution device alone does not comply with the regulation;
A power distribution equipment inspection system equipped with the above. A dimension calculation means is provided for calculating the dimensions,
2. The power distribution equipment inspection system according to claim 1, wherein the dimension calculation means is capable of calculating the dimensions of the housing by using information on the image of the housing of the distribution switchboard inputted by the image input means. The power distribution equipment inspection system according to claim 2, wherein the dimension calculation means is capable of calculating the dimensions of the housing using the dimensions of the power distribution equipment attached to the housing, image information on the external shape of the power distribution equipment attached to the housing, and image information on the external shape of the housing. The power distribution equipment survey system according to any one of claims 1 to 3, further comprising an equipment selection means capable of selecting a power distribution equipment that can be replaced with the power distribution equipment identified by the equipment identification means using information on the power distribution equipment identified by the equipment identification means and equipment specification data in the database. The grouping means is capable of grouping the character information in the image by comparing it with character combination information related to the type of the power distribution device stored in the database;
5. The power distribution equipment inspection system according to claim 1, wherein the equipment identifying means is capable of identifying the power distribution equipment by referring to model information of the power distribution equipment in the database that matches the character information grouped by the grouping means. The grouping means is capable of grouping characters in the image using character combination information related to at least one of a rated current, a rated sensitivity current, and a rated non-operating current stored in the database;
The power distribution equipment inspection system according to claim 5, wherein the equipment identification means is capable of identifying a power distribution equipment by referring to a combination of equipment model information in the database that matches the character information grouped by the grouping means and at least one piece of information of rated current, rated sensitivity current, and rated non-operating current. the grouping means is capable of grouping designs or character combinations in the image by manufacturer-recognizable design or character combination information stored in the database, and is also capable of grouping character combinations in the image by using character combination information related to at least one of a rated current, a rated sensitivity current, and a rated non-operating current stored in the database;
A power distribution equipment investigation system as described in any one of claims 1 to 4, wherein the equipment identification means is capable of identifying a power distribution equipment by referring to a combination of information regarding a manufacturer that can be identified from the design or text information grouped by the grouping means, and at least one piece of information regarding a rated current, a rated sensitivity current, and a rated non-operating current. A power distribution equipment inspection system according to any one of claims 1 to 7, comprising a breaker determination means for determining that the power distribution equipment with the largest rated current among the identified multiple power distribution equipment is the main breaker, and determining that the other power distribution equipment are branch breakers. A power distribution equipment inspection system according to any one of claims 1 to 7, comprising a breaker determination means for determining that a power distribution equipment that is the only equipment equipped with a neutral phase loss protection function or a ground fault interruption function is a main breaker, and determining that other power distribution equipment is a branch breaker.

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