JP4377765B2 - Power distribution board - Google Patents

Description

  The present invention relates to a distribution board for receiving and transforming electric power, and particularly to a technique for detecting an accident precursor phenomenon of a distribution board that has been used for a long period of time.

Conventionally, detection of abnormal insulation and abnormal overheating has been carried out to detect accident precursors associated with secular changes in power distribution boards installed in various plant facilities such as electric power, industrial and general industries. . As for detecting the former insulation abnormality, it is shown that an antenna receives an electromagnetic wave when a partial discharge occurs due to an insulation abnormality of an electrical device housed in a cubicle (see, for example, Patent Document 1). ).
In order to detect the latter abnormal overheating, an odor generator is installed on the transformer in the cubicle, and when the transformer is overheated, the odor generator generates an odor due to the heat transfer. It is shown that a detection element detects (for example, refer patent document 2).

However, over the past few years, the distribution boards for power receiving and transforming that have been delivered to and installed in the various plant facilities have become more diversified in terms of the occurrence of abnormalities after aging with the advancement of performance, capacity and downsizing. ing. In particular, facilities that are affected by the salinity of landfills adjacent to the coast, and atmospheres containing NOx and SOx, have frequently generated abnormal accidents due to corrosion of electrical insulators and conductors.
Conventionally, the location where abnormal overheating is detected is specified, for example, on a transformer as disclosed in Patent Document 1, but it has not necessarily been specified as a single location from accident examples in recent years. For example, the exposed conductor in the panel is corroded under the influence of atmospheric gas, and abnormal overheating due to increased resistance of the conductor contact part, poor contact, looseness of the conductor connection part, etc. has occurred in several places. .
Furthermore, complex abnormal phenomena such as insulation deterioration due to abnormal overheating, or abnormal overheating due to discharge accompanying insulation deterioration are sometimes found, and only abnormal discharge as shown in Patent Documents 1 and 2, or abnormal overheating. However, there is a problem that it has become impossible to deal with the accident precursor response technology that detects each of them alone.

In view of the current situation, as a result of investigating the cause of the accident and its ratio, and performing analysis based on Non-Patent Document 3 “Past Switchboard Fault Phenomena (Failure, Accident Cause)”,
(1) Insulation abnormality (insulation degradation, ground fault, short circuit): 47.2%
(2) Abnormal overheating (burning, overheating, melting): 29.2%
(3) Abnormal operation (malfunction): 7.9%
The above three types of abnormalities were found to account for about 84% of the total.

Japanese Utility Model Publication No. 3-101479 Japanese Patent Laid-Open No. 2003-35609 FIG. Japan Electrical Manufacturers' Association: Consideration of reliability of long-term power receiving / transforming equipment H11-1

  As described above, when only the antenna shown in Patent Document 1 is installed, about 47% of the whole, and when only the odor generating tool shown in Patent Document 2 is installed, about 29% of the whole trouble. It only detects the phenomenon. The present invention has been made to solve the above-described problems. By installing the insulation abnormality detection device, the abnormal overheat detection device, and the circuit breaker operation abnormality detection device in the switchboard, it is possible to reduce the cause of the entire accident. The purpose is to detect 84% in advance and prevent major accidents.

The distribution board for power reception and transformation according to the present invention is provided with an abnormal overheat detection device, an insulation abnormality detection device, and a circuit breaker operation abnormality detection device,
The abnormal overheat detection device is composed of an odor generator that generates an odor substance at a set temperature or higher and an odor detector that detects the odor, and a plurality of odor generators are provided on a member to be energized. It is what
The insulation abnormality detection device is composed of an antenna that detects an electromagnetic wave radiated with the occurrence of partial discharge, and an insulation abnormality alarm that issues an abnormality alarm when the electromagnetic wave signal transmitted from the antenna exceeds a predetermined value. And
The circuit breaker operation abnormality detection device previously calculates the time required from the start to the end of the circuit breaker based on the start and end signals of the circuit breaker transmitted from the switching operation signal transmitter provided in the circuit breaker. Compared with the set reference operation time, the circuit breaker operation abnormality alarm is configured to issue an abnormality alarm when the difference exceeds a predetermined value.

  Since the distribution board for power reception and transformation of this invention is provided with an abnormal overheat detection device, an insulation abnormality detection device, and a circuit breaker operation abnormality detection device, about 84% of all accidents in the distribution panel are detected in advance, Accidents can be prevented.

Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to the drawings.
FIG. 1 is a diagram showing a schematic configuration of a power receiving / transforming switchboard 100 according to the first embodiment. In the figure, a metal casing 1 is provided with a cable 2 for supplying power to other switchboards and loads, an instrument transformer 3 for measuring a current flowing through a main circuit conductor 5, and a circuit breaker 4. Yes. The main circuit terminal of the circuit breaker 4 is connected to the main circuit conductor 5 by a connection portion 6, and a contact that can be disconnected by inserting and removing the circuit breaker 4 is applied to the connection portion 6. The odor generator 8 ejects a gas containing an odor substance at a set temperature or higher. As shown in FIG. 1, the odor generator 8 is installed on a connection portion 6 between the circuit breaker 4 and the main circuit conductor 5. In addition, the odor generating tool 8 includes a connection portion between the cable 2 and the main circuit conductor 5, a connection portion between the main circuit conductor 5 and the instrument transformer 3, a connection portion between the main circuit conductors 5 and other parts. It is provided in the screw fastening portion. In other words, a plurality of odor generators 8 are installed on a member that is expected to rise in temperature due to energization due to various deterioration over time, and that the temperature rise is expected to exceed an allowable value.
The odor detector 7 can know that abnormal overheating has occurred by detecting when the odor generator 8 reaches the set temperature and ejects the odor substance. Since the odor substance is first transported toward the upper part of the gas flow in the switchboard 100, the odor detector 7 is generally installed in the upper part of the switchboard 100. Main circuit conductor 5 is connected to bus 13. Here, the odor generator 8 and the odor detector 7 constitute an abnormal overheat detecting device.
The antenna 10 detects electromagnetic waves radiated with partial discharge, and is connected to the insulation abnormality alarm 9.
It is desirable in terms of sensitivity that the antenna 10 is installed in the vicinity of a portion where partial discharge is expected to occur, and a plurality of antennas 10 may be installed for each monitoring target portion as necessary. The antenna 10 and the insulation abnormality alarm 9 constitute an insulation abnormality detection device.
The opening / closing operation signal transmission unit 12 is provided at an auxiliary contact that opens and closes together with the main contact point of the circuit breaker 4, and a signal from which the start and completion timings of the breaking and closing operations can be confirmed is obtained. The circuit breaker operation abnormality alarm 11 measures the time required from the start to the end of the circuit breaker operation based on this signal, and monitors whether there is an abnormality in the operation.
The opening / closing operation signal transmission unit 12 and the circuit breaker operation abnormality alarm 11 constitute a circuit breaker operation abnormality detection device.

The operation of the first embodiment having the above-described configuration is as follows. That is, the electric power (current) sent through the cable 2 is supplied by the main circuit conductor 5 through the instrument transformer 3 and the circuit breaker 4 from the bus 13 to another board (load) not shown. At this time, if the contact pressure of the connecting portion 6 that connects the terminal of the circuit breaker 4 and the main circuit conductor 5 decreases due to deterioration over time or is oxidized due to the influence of atmospheric gas, the contact resistance increases and the load The temperature of this part rises due to the electric current. When this temperature exceeds the melting temperature of the odor generating tool 8, the encapsulated odor substance is ejected. The odor detector 7 detects this odor substance and issues an alarm signal when it exceeds a predetermined value. Thereby, it can be known that abnormal overheating has occurred.
In addition, when the surface of the insulator in the switchboard 100 is fouled due to dust accumulation and the like, and the dust absorbs moisture, the insulation resistance is lowered and partial discharge occurs. The electromagnetic wave radiated along with this partial discharge is sent to the insulation abnormality alarm 9 through the antenna 10. When the electromagnetic wave signal transmitted from the antenna 10 exceeds a predetermined value, the insulation abnormality alarm 9 issues an alarm signal that notifies the insulation abnormality.
In general, the circuit breaker 4 has a mechanism part that drives the main contact of the circuit breaker 4 during use for a long time, such as lubricant (oil, grease, etc.) is evaporated, depleted, solidified, or dust is mixed into the mechanism part. The accumulation of the circuit breaker makes the movement worse, and the operation time from the start to the end of the circuit breaker 4 may become longer. In an extreme case, the circuit breaker 4 may not be able to be opened or closed. In such a case, if an electrical accident occurs, the protection of the system cannot be coordinated, and the circuit breaker higher than the circuit breaker 4 is operated (opened), thereby causing a ripple accident. The circuit breaker 4 has an auxiliary contact that opens and closes together with the main contact for control in addition to the main contact that normally opens and closes the main circuit (accident) current. Therefore, even if the switching time of the auxiliary contact is monitored, the change in the operation time of the breaker main contact can be known. The opening / closing operation signal (opening / closing pole time signal) of the auxiliary contact is sent from the opening / closing operation signal transmission unit (connector) 12 to the circuit breaker operation abnormality alarm 11 and compared with the reference operation time, and the difference exceeds a predetermined value. Occasional warning of circuit breaker operation.

Next, a description will be given of a new effect exerted by simultaneously providing three types of abnormality detection devices of abnormal overheating, insulation abnormality, and breaker operation abnormality.
The odor generator 8 is directly attached to a place where abnormal overheating may occur, such as a conductor connection or contact. As a fixing method, adhesive or wire / plastic wire is used, but if it falls due to the temperature cycle or slight vibration accompanying the operation of the switchboard, and the place where it falls is on an insulator or operating mechanism, an insulation failure However, even if the odor generating tool 8 is dropped by providing the insulation abnormality detection device and the circuit breaker operation abnormality detection device simultaneously as in the first embodiment, Insulation abnormality / breaker operation abnormality can be detected at an early stage. Further, for example, depending on the specifications of the circuit breaker, a sliding contact may be used instead of a flexible conductor called a shunt that is generally used as a current extraction method for the movable end. If the slide contact that is the current-carrying contact portion deteriorates due to wear, oxidation, dust accumulation, etc., it may cause not only abnormal overheating due to increased contact resistance but also circuit breaker operation abnormality. Therefore, by providing detectors for both abnormal overheating and circuit breaker operation abnormalities, it is possible to monitor such deterioration of the energized contact portion from two completely different methods, and to detect abnormalities more reliably. Become. That is, in this example, which is a predictive phenomenon before the occurrence of the main failure factor of the circuit breaker operation abnormality, the abnormal overheat phenomenon can be detected by the abnormal overheat detection device.
Furthermore, for example, before the electromagnetic resistance signal with partial discharge decreases and the electromagnetic wave signal with partial discharge exceeds a predetermined value, that is, before the insulation abnormality detection device detects an abnormality, the local abnormal overheating phenomenon such as an insulator is detected. An abnormal overheat detection device can also detect, and in such a case, large-scale discharge can be prevented.
As described above, since three types of abnormality detection devices of abnormal overheating, insulation abnormality and circuit breaker operation abnormality are provided, diversified accidents occurring in the panel can be complemented and detected in advance.
As described above, it is possible to prevent about 84% of accidents by detecting three types of abnormalities in the distribution board for receiving and transforming electric power, such as abnormal overheating, insulation abnormalities, and circuit breaker abnormalities. The reliability as a detection device can also be increased synergistically.

Embodiment 2. FIG.
FIG. 2 is a diagram showing a schematic configuration of a power receiving / transforming switchboard 100 according to the second embodiment of the present invention. In the figure, the partition wall 14 is made of, for example, a metal or resin having a gap that can transmit electromagnetic waves generated by partial discharge, so that the inside of the switchboard cabinet 1 is a cable chamber 21 that is a power wiring portion, and a bus bar. It is divided into a chamber 22, a circuit breaker unit 23, and a control unit 24 for safety and convenience during inspection and cleaning. The wall bushing 15 penetrates the partition wall 14 in order to connect the main circuit conductor 5 to the circuit breaker 4. Other devices provided in the switchboard 100 are the same as those in the first embodiment described above, and thus the description thereof is omitted.
As described above, when the inside of the switchboard cabinet 1 is divided into a plurality of rooms, the gas that becomes the source of the odor that the odor generating tool 8 is melted and enclosed in one section (room) This gas is unlikely to flow out of the section even if it is ejected. Therefore, when the odor detector 7 is installed in a different category from the odor generator 8, it may take time to detect abnormal overheating or may not be detected. Therefore, in FIG. 2, the odor detector 7 is installed for each room in the switchboard casing 1. Thereby, since the occurrence of abnormal overheating in each section can be reliably detected, the detection of abnormal overheating can be performed quickly and reliably.

Embodiment 3 FIG.
FIG. 3 is a schematic configuration diagram of a power receiving / transforming switchboard 100 according to the third embodiment of the present invention. As shown in the figure, the switchboard is adjacent to the first power distribution board 100a, and the second switchboard 100b, the third switchboard 100c,..., The nth switchboard 100n are juxtaposed.
The first switchboard 100a is provided with the same equipment, abnormal overheat detection device, insulation abnormality detection device, and circuit breaker operation abnormality detection device as in the first embodiment.
On the other hand, the second, third,..., Nth switchboards are provided with an abnormal overheat detection device composed of an odor generating tool and an odor detector. Further, as shown in FIG. A signal transmission unit 12 is provided.
The insulation abnormality alarm 9a and the circuit breaker operation abnormality alarm 11a provided in the first switchboard 100a are provided with a plurality of sensor input terminals (not shown). The insulation abnormality alarm 9a is the first switchboard 100a. In addition to the electromagnetic wave signal emitted by the antenna 10, the electromagnetic wave signal from the antenna 10 of the second to nth switchboards is also received and an alarm signal is emitted. Furthermore, the circuit breaker operation abnormality alarm 11a also receives a signal from the opening / closing operation signal transmitter 12 provided in the first to nth switchboards and issues an alarm signal.
As described above, in the third embodiment, the other second to nth adjacently arranged in parallel with the insulation abnormality alarm 9a and the circuit breaker operation abnormality alarm 11a provided in the first switchboard 100a. Since the abnormality generated by the switchboard can be detected, the apparatus becomes inexpensive.

Embodiment 4 FIG.
FIG. 4 is a diagram showing an abnormality alarm device according to Embodiment 4 of the present invention, in which an insulation abnormality alarm device 9 and a circuit breaker operation abnormality alarm device 11 are juxtaposed. In FIG. 4, a common power supply unit 92 is provided in the detection circuit unit 91 of the insulation abnormality alarm 9 and the detection circuit unit 93 of the circuit breaker operation abnormality alarm 11 and is supplied with power.
In this case, the insulation abnormality detector 9 and the circuit breaker operation abnormality alarm 11 may be installed side by side, and may be incorporated in the same housing as well as sharing the power source. By adopting such a configuration, the power source of one detector can be omitted, and the size and weight can be reduced. The power supply unit 92 may be dedicated to the circuit unit and housed in the same power supply casing.
In addition, as shown in FIG. 5, the insulation abnormality alarm 9, the circuit breaker operation abnormality alarm 11, and the odor detector 7 may be assembled together.

Embodiment 5 FIG.
FIG. 6 is a diagram showing the relationship between the abnormality alarm device and the abnormality display panel in the fifth embodiment of the present invention. The anomaly display panel 30 collects signals from the anomaly alarms of the abnormal overheat insulation circuit breaker operation installed in each distribution board installed in a plurality of units, and the board name and the type of abnormality (insulation abnormality, abnormal overheat, An abnormality indicator 301, 302, 303,... For displaying (breaker operation abnormality) is incorporated. Reference numeral 31 denotes a signal line bundle for connecting the abnormality indicator 7, 9, 11 of each distribution board and the abnormality display board 30. The signal line 311 of the abnormal overheat indicator 7 and the signal line 312 of the insulation abnormality indicator 9 in the distribution board. , And the signal line 313 of the breaker operation abnormality alarm 11 are collectively shown, one end to each abnormality alarm (7, 9, 11) and the other end to an abnormality indicator (301, 302, 303). Connected to.
In FIG. 6, for example, if an insulation abnormality occurs in the switchboard 1 and the insulation abnormality alarm 9 produces an abnormality, the insulation abnormality display unit 302 corresponding to the name of the abnormality display board 30 is operated through the signal line 312. Displays the name of the board where the error occurred and the details of the error.
The abnormality display panel 30 may be installed in a separate room such as a central monitoring room, or may be installed in parallel at a plurality of locations.
In the above, the case of the wired system in which the distribution board and the abnormality display board are connected by the signal line bundle 31 has been described. However, the wireless communication system has a wireless transmitter on the distribution board 100 side and a wireless receiver on the abnormality display board 30 side. In any case, either method is selected depending on the installation location between the two boards and the cost of contacting maintenance personnel.
As described above, in the fifth embodiment, the board in which an abnormality has occurred and the contents of the abnormality are displayed, so that countermeasures and measures can be taken quickly.

Embodiment 6 FIG.
FIG. 7 is a diagram showing the relationship between each abnormality alarm device and abnormality display panel 30a according to the sixth embodiment of the present invention. In the present embodiment, each abnormality alarm is provided with a relay, and its output is output when the contact is ON and OFF, and these terminals are connected in parallel as viewed from the signal line 311a side. The contact is open at normal time, but if an abnormality is output from any of the abnormality alarms, the contact is closed. As a result, both poles of the signal line are short-circuited and it is understood that some abnormality has occurred. This configuration is characterized in that the cable 311a connecting each switchboard and the abnormality display board 30 may be a two-core wire.
As described above, the sixth embodiment is economical because the number of signal lines can be reduced.

Embodiment 7 FIG.
FIG. 8 is a diagram illustrating an example of each abnormality alarm and its notification method according to Embodiment 7 of the present invention. In the seventh embodiment, an automatic notification device 320 is provided in place of the abnormality display panel 30a of the sixth embodiment, and the abnormal output of each abnormality notification is connected in parallel to the automatic notification device 320. . When an abnormal output occurs, the automatic notification device 320 calls the pre-registered mobile phone 321 of the manager in charge and notifies that an abnormality has occurred. Note that the destination of the notification may be not only a mobile phone but also an abnormality management device provided with a wireless communication receiving device. This makes it possible to respond quickly when an abnormality occurs.

Embodiment 8 FIG.
FIG. 9 is a diagram illustrating each abnormality alarm and its notification method according to Embodiment 8 of the present invention. In the eighth embodiment, the output of each abnormality alarm is connected to the interface 322 in place of the automatic alarm 320 of the seventh embodiment. This interface is connected to a network such as a LAN 323 on the premises of a factory or building where a switchboard is installed, and a plurality of PC terminals 324 at other locations on the premises, or PC terminals at remote locations via the Internet network, etc. The presence or absence of an abnormality can be confirmed on the terminal.
As described above, in the eighth embodiment, it can be easily confirmed whether or not an abnormality has occurred in the switchboard even from a location away from the place where the switchboard is installed.

  As described above, Embodiments 1 to 8 of the present invention can prevent the occurrence of abnormal accidents due to secular change when applied to power distribution boards for power receiving and transforming such as those for electric power, industry, and general industry. .

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram of the distribution board for electric power receiving / transforming of Embodiment 1 of this invention. It is a schematic block diagram of the distribution board for electric power receiving / transforming of Embodiment 2 of this invention. It is a schematic block diagram of the switchboard for electric power receiving / transforming of Embodiment 3 of this invention. It is a figure which shows the abnormality alarm of Embodiment 4 of this invention. It is a figure which shows the abnormality alarm of Embodiment 4 of this invention. It is a figure which shows the abnormality alarm device and abnormality display panel of Embodiment 5 of this invention. It is a figure which shows the abnormality alarm device and abnormality display panel of Embodiment 6 of this invention. It is a figure which shows the abnormality alarm of Embodiment 7 of this invention, and its notification method. It is a figure which shows the abnormality alarm device of Embodiment 8 of this invention, and its notification method.

Explanation of symbols

4 circuit breaker, 5 main circuit conductor, 6 connection, 7 odor detector, 8 odor generator,
9, 9a Insulation abnormality alarm, 10 antenna, 11, 11a Breaker operation abnormality alarm,
12 opening / closing operation signal transmission part, 14 partition, 23 circuit breaker part, 24 control part,
25 power wiring section, 30, 30a abnormality display panel, 91 insulation abnormality circuit section, 92 power supply section, 93 circuit breaker operation abnormality circuit section, 100 power distribution board
100a to 100n 1st to n-th power distribution board for power receiving / transforming, 320 automatic reporting device,
322 interface, 323 LAN.

Claims (8)

A distribution board for receiving and transforming power,
The distribution board for power reception and transformation is provided with an abnormal overheat detection device, an insulation abnormality detection device and a circuit breaker operation abnormality detection device,
The abnormal overheat detection device is composed of an odor generator that generates an odor substance at a set temperature or higher, and an odor detector that detects the odor, and a plurality of the odor generator are provided on a member to be energized. It is provided,
The insulation abnormality detection device includes an antenna that detects an electromagnetic wave radiated when a partial discharge occurs, and an insulation abnormality alarm that issues an abnormality alarm when an electromagnetic wave signal transmitted from the antenna exceeds a predetermined value. Has been
The circuit breaker operation abnormality detection device is based on the circuit breaker closing operation start and completion signals transmitted from the switching operation signal transmitter provided in the circuit breaker, and the time required from the circuit breaker operation start to end Is configured with a circuit breaker operation abnormality alarm device that issues an abnormality alarm when the difference exceeds a predetermined value, and when the abnormality occurs in the panel, the abnormal overheating A power receiving / transforming switchboard, wherein an abnormality is detected by at least one of a detection device, an insulation abnormality detection device, and a circuit breaker operation abnormality detection device. A distribution board for receiving and transforming power,
The power receiving / transforming distribution board refers to each of the first to n-th plurality of power receiving / transforming distribution boards installed adjacent to each other, and the first power receiving / transforming distribution board includes abnormal overheating. A detection device, an insulation abnormality detection device, and a circuit breaker operation abnormality detection device are provided.
The abnormal overheat detection device is composed of an odor generator that generates an odor substance at a set temperature or higher, and an odor detector that detects the odor, and a plurality of the odor generator are provided on a member to be energized. It is provided,
The insulation abnormality detection device includes an antenna that detects an electromagnetic wave radiated when a partial discharge occurs, and an insulation abnormality alarm that issues an abnormality alarm when an electromagnetic wave signal transmitted from the antenna exceeds a predetermined value. Has been
The circuit breaker operation abnormality detection device is based on the circuit breaker closing operation start and completion signals transmitted from the switching operation signal transmitter provided in the circuit breaker, and the time required from the circuit breaker operation start to end Is configured with a breaker operation abnormality alarm device that issues an abnormality alarm when the difference exceeds a predetermined value.
The second to nth power receiving / transforming distribution boards except the first are provided with the abnormal overheat detecting device in the same manner as the first power receiving / transforming distribution board,
The antenna and the opening / closing operation signal transmission unit are provided, and an electromagnetic wave signal received by the antenna is transmitted to the insulation abnormality alarm provided on the first power distribution board. The circuit breaker closing operation start and completion signals transmitted by the unit are transmitted to the circuit breaker operation abnormality alarm provided in the first power receiving / transforming switchboard, and abnormal when the respective predetermined values are exceeded. is intended to emit an alarm, before it came to have abnormality in the panel's rating overheating detection device, of the insulating abnormality detection device and the circuit breaker operation abnormality detection device, characterized by detecting an abnormality by at least one of the devices Power distribution board for receiving and transforming power. The distribution board for power receiving and transforming is provided with a partition that divides the inside of the casing into a cable room, a bus bar room, a circuit breaker unit, and a control unit, and the abnormal overheat detection device includes the cable room, the bus bar room, The power receiving / transforming switchboard according to claim 1, wherein the power distribution board is provided in each of the container part and the control part. Each of the insulation abnormality alarm and the circuit breaker operation abnormality alarm is provided with a detection circuit unit and a common power source unit, and power is supplied from the common power source unit to the detection circuit unit. The switchboard for power receiving / transforming according to any one of claims 1 and 2. A plurality of power receiving / transforming switchboards are installed, and in addition, an abnormality display panel is provided, and the abnormality display panel is abnormal in overheating, insulation and circuit breaker operation for each of the plurality of power receiving / transforming switchboards. A display unit, and the abnormality display unit is connected to an odor detector, an insulation abnormality alarm device and a circuit breaker operation abnormality alarm device of each of the power reception and transformation distribution boards, and each of the power reception and transformation distribution boards The power receiving / transforming switchboard according to claim 1, wherein each abnormality is displayed on the abnormality display unit. A plurality of power receiving / transforming distribution boards are installed, and in addition, an abnormality display panel is provided, and the abnormality display panel has an abnormality display section of each power receiving / transforming distribution board,
The odor detector, insulation abnormality alarm device and circuit breaker operation abnormality alarm device of each power receiving / transforming switchboard are connected in parallel to the abnormality display unit and each is provided with a relay. The power receiving / transforming switchboard according to claim 1, wherein when it occurs, the relay contact is turned on and displayed on the abnormality display unit. The power receiving / transforming distribution board is additionally provided with an automatic reporting device, and the odor detector, insulation abnormality alarm and circuit breaker operation abnormality reporting device of the power receiving / transforming distribution board are connected to the automatic reporting device. When each abnormality occurs, the relay contacts are turned ON and abnormality information is transmitted from the automatic reporting device to the person in charge of managing the distribution board for power receiving / transforming. The distribution board for power receiving and transforming according to claim 1. In addition to the interface unit, the power receiving / transforming switchboard is further provided with a LAN and a plurality of terminals connected to the interface unit, the odor detector of the power receiving / transforming switchboard, insulation abnormality The alarm device and the circuit breaker operation abnormality alarm device are connected in parallel to the interface unit and are provided with relays, respectively, and when each abnormality occurs, the contact of the relay is turned on via the LAN. The power receiving / transforming switchboard according to claim 1, wherein abnormality information is transmitted to the plurality of terminals.

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