JP4137772B2 - Branch device and rectifier - Google Patents

Description

  The present invention relates to a branch device, a rectifier, and a program that receive supply of DC power, branch the DC power individually to a plurality of load devices, and output the branched DC power.

In a conventional rectifier, when DC power is branched and supplied to a plurality of load devices, each branch device constituting the rectifier is equipped with an overcurrent protection means such as a fuse or a breaker for the purpose of protecting the backbone. (For example, refer to Patent Document 1).
JP-A-8-79987 (paragraph 0013, FIG. 1)

According to the above-described prior art, as the number of branching devices increases, the presence / absence of individual connections, current and power usage status become unclear, whether or not a new load device is introduced, and quick treatment in a current overload state There was a problem.
In addition, since the power consumption of the load device is different for each load device, it is difficult to grasp the usage status, and there is a problem that the effect cannot be seen even if a load device with low power consumption is introduced. .

  The present invention has been made in view of the above circumstances, and enables the use status of each branch device to be ascertained by an external monitoring device, whereby a branch device and a rectifier that facilitate maintenance for an overload state An object is to provide an apparatus and a program.

  In order to solve the above-described problems, the present invention is a branching device provided with overcurrent protection means that receives supply of DC power, and branches and outputs the DC power individually to a plurality of load devices, A connection presence / absence detecting unit that detects the presence / absence of connection of the overcurrent protection means in the load device, a current comparison unit that measures a current value of each of the load devices and compares the current value with a predetermined value, An alarm generation unit that generates an alarm depending on the comparison result is provided.

  The present invention further includes an integrated power amount calculation unit that calculates an integrated power amount based on a current value measured by the current measurement unit and a voltage value measured via the connection presence / absence detection unit. And

  In the present invention, the connection presence / absence detection unit detects a mechanical contact that operates in conjunction with the overcurrent protection means, and converts it into an electrical signal to detect the presence / absence of connection.

  In order to solve the above-described problems, the present invention is a rectifier that converts alternating current power into direct current power and supplies the direct current power to each load device individually through a branching device having overcurrent protection means. A connection presence / absence detecting unit for detecting presence / absence of connection of the overcurrent protection means in each of the load devices, and a current for measuring a current value of each of the load devices and comparing the current value with a predetermined value set in advance. The integrated power amount is calculated based on the comparison unit, the alarm generation unit that generates an alarm depending on the comparison result, the current value measured by the current measurement unit, and the voltage value measured through the connection presence / absence detection unit. And an integrated power amount calculation unit.

  In order to solve the above-described problems, the present invention is a program used in a branching device having overcurrent protection means that receives supply of DC power, branches the DC power separately to a plurality of load devices, and outputs the branched DC power. Detecting the presence / absence of connection of the overcurrent protection means in each of the load devices, measuring a current value of each of the load devices and comparing it with a predetermined value set in advance, and the comparison Depending on the result, the step of generating an alarm is caused to be executed by a computer.

  In order to solve the above-described problems, the present invention provides a rectifier that converts alternating current power into direct current power and supplies the direct current power to each load device via a branch device that is individually provided with overcurrent protection means. A program to be used, the step of detecting whether or not the overcurrent protection means is connected in each of the load devices; and the current value of each of the load devices is measured and compared with a predetermined value set in advance A step of generating an alarm depending on the comparison result, a step of calculating an integrated power amount based on a current value measured by the current measurement unit and a voltage value measured via the connection presence / absence detection unit; Are executed by a computer.

According to the present invention, whether or not an overcurrent protection means such as a fuse or a breaker is connected is measured by measuring the voltage value on the load side of each branch device, or detecting a mechanical contact that operates in conjunction with the overcurrent protection means. The status (connection presence / absence) can be displayed on an externally connected monitoring terminal (such as a PC), and when the measured current value of each branch device exceeds a predetermined value, A warning is displayed to call attention. This makes it possible to grasp the usage status of each branch device.
In addition, the integrated power is calculated based on the measured current value and voltage value and displayed on a monitoring terminal (PC, etc.) to provide a branch device and a rectifier that facilitate maintenance operations such as monitoring overload conditions. can do.

FIG. 1 is a diagram showing a schematic internal configuration of a branching device and a rectifying device of the present invention. In FIG. 1, reference numeral 1 denotes a rectifier. The rectifier 1 includes a plurality of branch devices 2 with a plurality of rectifier units (RF · U) that receive a commercial power supply (AC) of 200 V as an input and rectify and output to DC-48 V in this case. A direct current is supplied to each load device 3 via the. Each branching device 2 is equipped with overcurrent protection means such as a fuse or a breaker.
Reference numerals 12 and 22 denote controllers prepared for controlling the rectifying unit 11 and the branching device 2 and communicating with the monitoring terminal 4 connected externally. Only the internal configuration of the controller 22 will be described later.

FIG. 2 is a block diagram showing the functions of the internal configuration of the controller 22 shown in FIG.
The controller 22 functionally includes a connection presence / absence detection unit 221, a current measurement unit 222, a current comparison unit 223, an alarm generation unit 224, an integrated power amount calculation unit 225, a communication unit 226, a threshold TBL (Table ) 227 is roughly divided into two parts.

The connection presence / absence detection unit 221 has a function of detecting the presence / absence of connection of the overcurrent protection means 21 in each load device 3, and determines by measuring the voltage value on the load device 3 side and comparing it with a predetermined value. Alternatively, the presence or absence of connection is determined by detecting the mechanical contact of the overcurrent protection means.
FIG. 4 shows the latter determination principle. That is, the connection presence / absence detection unit 221 can detect the mechanical contact SW that operates in conjunction with the overcurrent protection means 21, and can convert it into an electrical signal to detect the presence / absence of the connection. Here, a breaker has been exemplified, but a fuse can be similarly detected by diverting this mechanism to a fuse box. Here, the principle of determining the presence or absence of connection by measuring the voltage value on the former load device 3 side and comparing it with a predetermined value is used.

Returning to FIG. The current measuring unit 222 measures the current value of each load device 3 and supplies it to one input terminal of the current value comparing unit 223. A predetermined value set in advance from the threshold value TBL 227 is supplied as a comparison target to the other input terminal of the current comparison unit 223. The alarm generation unit 224 obtains an output from the current comparison unit 223 and generates and outputs an alarm via the communication unit 226 to the LED included in the branch device 2 or the monitoring terminal 4 connected externally.
The integrated power amount calculation unit 225 calculates the integrated power amount based on the current value measured by the current measurement unit 222 and the voltage value measured via the connection presence / absence detection unit 221, and outputs the integrated power amount via the communication unit 226. It is supplied to the monitoring terminal 4 attached.

  FIG. 3 is a flowchart cited for explaining the operation of the embodiment of the present invention. The operation of the rectifying device and the branching device shown in FIGS. 1 and 2 will be described in detail below with reference to the flowchart shown in FIG.

  First, the connection presence / absence detector 221 of the branch device 2 reads the branch voltage value (α) on the load device 3 side (S31), and compares it with the overvoltage set value (V) (α: V) (S32). Here, when the branch voltage value (α) is smaller than the overvoltage set value (V) (α <V), it is determined that the voltage is overvoltage, an overvoltage alarm is generated (S39), and a notification to that effect is given to the monitoring terminal ( PC etc.) 4 is displayed. On the other hand, when the branch voltage value (α) is equal to or higher than the overvoltage set value (V) (α ≧ V), next, the branch current value is read (S33), and the read branch current value (β) is the overcurrent set value. Compare with (I). As a result of the comparison, when the branch current value (β) is equal to or greater than the overcurrent set value (I) (β ≧ I), it is determined that the current is overcurrent, and an overvoltage alarm is generated (S40). Displayed on a monitoring terminal (PC or the like) 4. On the other hand, when the branch current value (β) is smaller than the overcurrent set value (I) (β <I), the voltage value and the current value are displayed on the monitoring terminal (PC) 4 (S35), and the process of S31 Return to.

  Here, the comparison target is provided as a real number as a threshold value. For example, when the overcurrent protection means 21 is a fuse, it is less than 75%, and when the breaker is a breaker, it is less than 80%. Similar results can be obtained by computing with values.

Next, the integrated power amount calculation unit 225 calculates the integrated power amount by multiplying the current value measured by the current measurement unit 222 and the voltage value measured via the connection presence / absence detection unit 221. (S36).
Various pieces of data including the integrated power amount are transmitted to the monitoring terminal 4 via the communication unit 226 as a response to polling (S37) periodically issued every time the power screen button is clicked from the monitoring terminal 4. (S38). Upon receiving the response, the monitoring terminal 4 displays those data on the display monitor and alerts the maintenance personnel.

As described above, according to the present invention, whether or not the overcurrent protection means 21 such as a fuse or a breaker is connected is measured by measuring the voltage value on the load side of each branch device, or in conjunction with the overcurrent protection means 21. By detecting the mechanical contact that operates, the status (connection presence / absence) can be displayed on the externally connected monitoring terminal 4, and the measured current value of each branch device 2 exceeds a predetermined value. In such a case, a warning is displayed on the monitoring terminal 4 to call attention. This makes it possible to grasp the usage status of each branch device 4.
Further, the integrated power amount is calculated based on the current value and the voltage value measured by the integrated power amount calculation unit 225 and displayed on the monitoring terminal 4, thereby facilitating maintenance operation such as monitoring of an overload state. And the rectifier 1 is provided.

In addition, although the structure which monitors the driving | running state of the rectification apparatus 1 by the stand-alone system with which the monitoring terminal 4 was connected to the rectification apparatus 1 was shown here, LAN (Local Area Network) is constructed | assembled and the monitoring terminal 4 is located remotely By doing so, it is possible to realize remote monitoring of the driving state.
In addition, the procedure executed by each of the connection presence / absence detection unit 221, current measurement unit 222, current comparison unit 223, alarm generation unit 224, integrated power amount calculation unit 225, and communication unit 226 shown in FIG. The present invention can also be realized by recording on a recording medium, causing the computer system to read and execute the program recorded on the recording medium. The computer system here includes an OS and hardware such as peripheral devices.

Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used.
The program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line.
The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, and what is called a difference file (difference program) may be sufficient.

  The embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to the embodiments, and includes designs and the like that do not depart from the gist of the present invention.

It is a figure which shows the internal structure of the branch apparatus and rectifier of this invention. It is the block diagram which expanded and showed the function of the internal structure of the controller 22 shown in FIG. It is the flowchart quoted in order to demonstrate operation | movement of embodiment of this invention. It is the figure quoted in order to demonstrate the operation principle for the presence or absence detection of the overcurrent protection means used by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 ... Branch apparatus, 3 ... Load apparatus, 4 ... Monitoring terminal, 221 ... Connection presence detection part, 222 ... Current measurement part, 223 ... Current comparison part, 224 ... Alarm production | generation part, 225 ... Integrated electric energy calculation part, 226 ... Communication unit, 227... Threshold TBL

Claims (3)

A branch device provided with overcurrent protection means for receiving supply of DC power and branching and outputting the DC power individually to a plurality of load devices,
A connection presence / absence detecting unit for detecting the presence / absence of connection of the overcurrent protection means in each of the load devices;
A current comparison unit that measures a current value of each of the load devices and compares the current value with a predetermined value;
Depending on the result of comparison by the current comparison unit, an alarm generation unit that generates an alarm, and
Equipped with a,
The branch presence / absence detection unit detects a mechanical contact that operates in conjunction with the overcurrent protection unit, converts the contact into an electrical signal, and detects the presence / absence of a connection . A current value before Symbol measuring meter, according to claim 1, wherein the provided connecting presence detection unit further integrated power calculation means for calculating an integrated electricity based on the voltage value measured via Branch device. A rectifier that converts alternating current power into direct current power and supplies the direct current power to each load device via a branch device that individually includes overcurrent protection means,
A connection presence / absence detecting unit for detecting the presence / absence of connection of the overcurrent protection means in each of the load devices;
A current comparison unit that measures a current value of each of the load devices and compares the current value with a predetermined value;
An alarm generation unit that generates an alarm depending on a comparison result by the current comparison unit, and
A current value before Symbol measurement meter, the integrated power calculation means for calculating an integrated electricity based on the voltage value measured via the connection-detection section,
Equipped with a,
The connection presence / absence detection unit detects a mechanical contact that operates in conjunction with the overcurrent protection unit, converts the contact into an electrical signal, and detects the presence / absence of a connection .

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