Abstract:
To shorten a period of time necessary for performing routine inspections and reduce costs by monitoring a state such as a contact failure of a switching equipment which constitutes a power reception circuit or a branch circuit of a substation through a simple construction. A sensor attached IC tag application high voltage equipment is constructed by detachably mounting a sensor attached IC tag at a position where a sensor of a sensor attached IC tag obtains a physical quantity of a detection target, wherein the sensor attached IC tag is configured to communicate with an externally located IC tag reader.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    The present invention relates to a high voltage equipment for performing transformation and switching of an electric power system. In particular, the invention relates to a sensor attached IC tag is provided with high voltage equipment (hereinafter, referred to as “sensor attached IC tag application high voltage equipment”) in which improvement in the safety during an inspection and reduction in inspection costs are achieved. 
         [0003]    2. Related Art 
         [0004]    In a substation facility such as a substation, in general, an electric power received from an electric power transmission line is supplied via a bus of a primary side to a primary side of an electric transformer. After the electric power is transformed by the electric transformer, the electric power is supplied to a bus of a secondary side and then supplied to a load circuit via a bus on the secondary side. 
         [0005]    The substation facility is constructed by a line unit for switching an electric power reception line from an electric power transmission line side to the bus on the primary side, a primary side electric transformer unit for switching an electric transformer circuit between the bus on the primary side and the electric transformer or a secondary side electric transformer unit for supplying an electric power on the secondary side of the electric transformer and the bus on the secondary side, a branch unit for switching a branch circuit from the bus on the secondary side to the load circuit, and the like. In addition, high voltage equipments having substantially the same configuration are installed for the respective units connected to the bus on the primary side or the bus on the secondary side. 
         [0006]    Conventional high voltage equipments to be installed in a gas are individually installed with consideration for an insulation distance, an inspection space, and the like in each necessary equipment. Japanese Unexamined Utility Model Registration Application Publication No. 61-186136 and Japanese Unexamined Patent Application Publication No. 2000-253523 disclose an insulator type gas circuit breaker in which a CT (Current Transformer) is mounted to a breaker unit as an example of the conventional high voltage equipments to be installed. 
         [0007]    As respectively independent equipments are installed in the conventional gas insulation high voltage equipment, a cable obtained by binding thin copper lines is used between the equipments. The equipments are electrically connected by contacting and fixing this cable to a dedicated connection unit provided for each equipment with use of a fixing tool such as a mounting bolt. 
         [0008]    The conventional gas insulation high voltage equipments achieving such electrical connections are usually installed in outdoor locations and exposed to rain. In particular, in recent years, an influence of acid rain along with a development of an aerial pollution due to the presence of an acid substance such as nitrogen dioxide causes an oxidation phenomenon at a part between the cable and the connection unit of the equipment. As the oxidation phenomenon advances in the part between the cable and the connection unit, a resistance at the oxidation part is increased, that is, a thermal loss at the oxidation part is increased. Thus, such problems may occur with degradation of an insulating material of the equipment, loss in electric power transmission, and the like. 
         [0009]    In order to solve the above-mentioned problems, conventionally, a method of grasping a temperature rise using infrared rays at a patrol in routine inspections is adopted. Examples of the method of grasping the temperature rise using the infrared rays include a method of performing temperature measurement to detect the temperature rise using an infrared thermometer or the like and a method of detecting the partial temperature rise by capturing an infrared image. 
         [0010]    However, according to the method using the infrared thermometer, the number of measurement points is extremely large and it takes much time for patrol for inspection. To carry out the inspection in one day, many persons (manpower) need to join the inspection. On the other hand, according to the method of detecting the local temperature rise by capturing the infrared image, an infrared image pickup apparatus is extremely expensive and can not be easily used. 
         [0011]    In addition, these methods using the infrared rays can be employed only at locations where the infrared rays can be directly measured from a spot with a higher temperature. Thus, the temperature measurement cannot be performed through the methods at locations where the infrared rays are blocked by a material through which the infrared rays do not pass. 
         [0012]    Upon measuring a partial discharge of a gas insulation switch, a method of sequentially supplying a voltage to each unit of a power system and sequentially inputting a disconnecting switch and a circuit breaker to confirm the presence or absence of the generation of the partial discharge is frequently used. 
         [0013]    However, according to the above-mentioned method, in the event that the partial discharge is generated while a certain disconnecting switch or the circuit breaker is input, it is impossible to determine whether the partial discharge is generated on a downstream part of the input equipment or the partial discharge is generated on an upstream part of the equipment connected to a following cable. 
       SUMMARY OF THE INVENTION 
       [0014]    The present invention has been made to solve the above-mentioned problems and it is an object of the present invention to reduce inspection costs by shortening an inspection period of time for inspecting a connection state of a connection part of a cable between equipments performed for each unit constituting an electric power reception circuit or a branch circuit of a substation, shortening an inspection period of time for inspecting a contact part of a switch, and shortening a period of time for specifying a generation part of a partial discharge. 
         [0015]    In order to solve the above-mentioned problems, a high voltage equipment to which a sensor attached IC tag is applied (a sensor attached IC tag application high voltage equipment) according to an aspect of the present invention includes: a container filled with an insulating gas; a high voltage unit provided inside the container; and a sensor attached IC tag detachably mounted to a position where a sensor of the sensor attached IC tag obtains a physical quantity of a detection target, wherein the sensor attached IC tag is configured to communicate with an IC tag reader located outside the sensor attached IC tag application high voltage equipment. 
         [0016]    The present invention is configured so that the sensor attached IC tag is mounted to the contact point of the high voltage equipment or the cable connection unit, the result is stored in a storage apparatus, and an output is transmitted by an IC tag reader-writer. Therefore, it is possible to shorten the inspection period of time for inspecting the connection state of the connection unit of the cable between equipments performed for each unit constituting the electric power reception circuit or the branch circuit of the substation, shorten the inspection period of time for inspecting the contact part of the switch, and shorten the period of time for specifying the generation part of the partial discharge. As a result, it is possible to reduce the inspection costs. 
     
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0017]      FIG. 1  is a vertical cross-sectional view of an insulator gas circuit breaker, which is an example of a high voltage equipment, provided with a temperature sensor attached IC tag according to the present invention (first embodiment of the insulator gas circuit breaker as the present invention); 
           [0018]      FIG. 2  is a schematic diagram of a configuration outline of a sensor attached IC tag provided to the high voltage equipment according to the present invention and an IC tag reader-writer which performs wireless communication with the sensor attached IC tag provided to the high voltage equipment; 
           [0019]      FIG. 3  is an explanatory diagram for describing an example of an information configuration stored in a memory of the sensor attached IC tag provided to the high voltage equipment according to the present invention; 
           [0020]      FIG. 4  is a vertical cross-sectional view of an insulator gas circuit breaker, which is an example of a high voltage equipment, provided with a temperature sensor attached IC tag according to the present invention (second embodiment of the insulator gas circuit breaker as the present invention); 
           [0021]      FIG. 5  is a vertical cross-sectional view of a an insulator gas circuit breaker, which is an example of a high voltage equipment, provided with a temperature sensor attached IC tag according to the present invention (third embodiment of the insulator gas circuit breaker as the present invention); 
           [0022]      FIG. 6  is a vertical cross-sectional view of an insulator gas circuit breaker, which is an example of a high voltage equipment, provided with a temperature sensor attached IC tag according to the present invention (fourth embodiment of the insulator gas circuit breaker as the present invention); 
           [0023]      FIG. 7  is a vertical cross-sectional view of an insulator gas circuit breaker, which is an example of a high voltage equipment, provided with a temperature sensor attached IC tag according to the present invention (fifth embodiment of the insulator gas circuit breaker as the present invention); 
           [0024]      FIG. 8  is a vertical cross-sectional view of an insulator gas circuit breaker, which is an example of a high voltage equipment, provided with a temperature sensor attached IC tag according to the present invention (sixth embodiment of the insulator gas circuit breaker as the present invention); 
           [0025]      FIG. 9  is a vertical cross-sectional view of an insulator gas circuit breaker, which is an example of a high voltage equipment, provided with a temperature sensor attached IC tag according to the present invention (seventh embodiment of the insulator gas circuit breaker as the present invention); 
           [0026]      FIG. 10  is a vertical cross-sectional view of a bushing, which is another example of the high voltage equipment, provided with a sensor attached IC tag according to the present invention (first embodiment of the bushing as the present invention); 
           [0027]      FIG. 11  is a vertical cross-sectional view of a bushing, which is another example of the high voltage equipment, provided with a sensor attached IC tag according to the present invention (second embodiment of the bushing as the present invention); and 
           [0028]      FIG. 12  is a vertical cross-sectional view of a lightning arrester, which is another example of the high voltage equipment, provided with a sensor attached IC tag according to the present invention. 
       
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0029]    Hereinafter, a description will be given of best modes (embodiments) for embodying a sensor attached IC tag is provided with high voltage equipment (hereinafter, referred to as “sensor attached IC tag application high voltage equipment”) according to the present invention with reference to the accompanying drawings. Further, it is to be noted that terms indicating directions such as up, down, left and right and the like are used herein with reference to actually used state of the sensor attached IC tag application high voltage equipment or in a state illustrated on the drawings. 
         [0030]      FIG. 1  is a vertical cross-sectional view of a temperature sensor attached IC tag application insulator gas circuit breaker  1 A that is an example of the sensor attached IC tag application high voltage equipment according to the present invention. 
         [0031]    As illustrated in  FIG. 1 , in the temperature sensor attached IC tag application insulator gas circuit breaker  1 A, a container includes a nonmetal porcelain tube  3  accommodating a breaker unit (switching unit)  2 , a supporting porcelain tube  4  for supporting the breaker unit  2  so as to be insulated from the ground (earth), a metal flange unit  5 , and a lower part supporting member  7  which seals the supporting porcelain tube  4  and is mounted to a mount  6  is filled with an insulating gas such as sulfur hexafluoride SF 6 . 
         [0032]    The temperature sensor attached IC tag application insulator gas circuit breaker  1 A has two electrode units  10   a  and  10   b  provided to the flange unit  5 . The temperature sensor attached IC tag application insulator gas circuit breaker  1 A performs the switching (connection/disconnection) operation by switching between the connecting (on) and the disconnecting (off) of the electrode units  10   a  and  10   b . To be more specific, as a fixed contact  11  provided on the flange unit  5  together with the upper electrode  10   a  is set closer to or separated from a movable contact  12  provided on the flange unit  5  together with the lower electrode  10   b  in the up and down direction, a disconnecting state and a connecting state are switched. That is, the configuration and operational principle for performing the connection/disconnection operation are similar to those of a conventional insulator gas circuit breaker. 
         [0033]    Herein, reference numeral  13  denotes a connection lead, reference numeral  14  denotes a terminal for electrically connecting the connection lead  13  with the electrode units  10   a  and  10   b , reference numeral  15  denotes a terminal cover for protecting the terminal  14 . Further, reference numeral  17  denotes an insulating nozzle arranged so as to cover an outer periphery of the fixed contact  11 , reference numeral  19  denotes an operation piston supported by the terminal  14  of the lower electrode unit  10   b,  reference numeral  20  denotes a buffer cylinder forming a buffer chamber to which the movable contact  12  and the insulating nozzle  17  are mounted and which is swallowed by the operation piston  19 . Still further, reference numeral  21  denotes an insulating operation rod for integrally moving the movable contact  12 , the insulating nozzle  17 , and the buffer cylinder  20  in the up and down direction to perform the switching operation on the fixed contact  11  and the movable contact  12 , reference numeral  22  denotes a switch operation mechanism, reference numeral  23  denotes a slide contact unit, reference numeral  24  denotes a CT (Current Transformer), reference numeral  25  denotes an electric/optical (E/O) transducer, and reference numeral  26  denotes an optical/electric (O/E) transducer. 
         [0034]    As illustrated in  FIG. 1 , in the temperature sensor attached IC tag application insulator gas circuit breaker  1 A, an active type temperature sensor attached IC tag  30 A is mounted to the electrode unit  10   a . Further, in the temperature sensor attached IC tag application insulator gas circuit breaker  1 A, in order that a high electric field is not applied to a part to which the temperature sensor attached IC tag  30 A is mounted, an electrostatic shielding member  31  is utilized to achieve the electrostatic shielding. 
         [0035]    That is, the electrostatic shielding member  31  is mounted to an outer side of the temperature sensor attached IC tag  30 A, and the temperature sensor attached IC tag  30 A is covered so that a surface of the electrostatic shielding member  31  becomes smooth shape such as an egg shape. The electrostatic shielding member  31  is formed of a semiconductor material. In this manner, as the electrostatic shielding member  31  is utilized for the electrostatic shielding on the temperature sensor attached IC tag  30 A, the temperature sensor attached IC tag  30 A is not applied with the electric field. 
         [0036]    The semiconductor material utilized for the electrostatic shielding member  31  has a time constant represented by a product of an electric resistivity and a dielectric constant is equal to or lower than 1/10 6  second (micro second) so that the semiconductor material shows a sufficiently metallic characteristic to an electromagnetic wave of 1 MHz which is utilized as a commercial frequency or generated by the thunder. It should be noted that the time constant of the semiconductor material is equal to or larger than an inverse number of the communication frequency in order that the frequency utilized for the communication of the temperature sensor attached IC tag  30 A (communication frequency) can transmit therethrough. 
         [0037]    For example, if the frequency used for the communication of the temperature sensor attached IC tag  30 A is 1 GHz, the time constant of the semiconductor material used for the electrostatic shielding member  31  is set to 1/10 9  second (nano second) or larger but 1/10 6  second or smaller. In other words, a semiconductor material, in which an inverse number of the time constant is 1 MHz or larger but 1 GHz or smaller, is utilized for the electrostatic shielding member  31 . 
         [0038]    As a result of covering the temperature sensor attached IC tag  30 A with the electrostatic shielding member  31  which is formed of the semiconductor material having a characteristic as mentioned above, it is possible to prevent the high electric field from being applied to the temperature sensor attached IC tag  30 A and the temperature sensor attached IC tag  30 A is possible to communicate with the IC tag reader located outside a space shielded by the electrostatic shielding member  31  without disturbing the communication with the IC tag reader. That is, even in a situation where a voltage of a commercial frequency or a lightning surge (which means a surge voltage generated by the thunder) enters into the line, no negative influences are affected on the communication with the IC tag reader. In addition, it is possible to suppress a destruction of the temperature sensor attached IC tag  30 A and a partial discharge generated in the vicinity of temperature sensor attached IC tag  30 A. 
         [0039]      FIG. 2  is a schematic diagram illustrating configuration diagrams of a sensor attached IC tag  30  of the sensor attached IC tag application high voltage equipment according to the present invention and an IC tag reader-writer  33  which performs a wireless communication with the sensor attached IC tag  30  to read information from the sensor attached IC tag  30  or write information to the sensor attached IC tag  30 . It should be noted that in the IC tag  30 , solid lines illustrated in the IC tag reader-writer  33  represent flows of information and broken lines represent flows of energy. 
         [0040]    As illustrated in  FIG. 2 , the sensor attached IC tag  30  is provided with an antenna  35  for transmitting and receiving an electromagnetic wave including a signal or information (hereinafter simply referred to as “communication signal”)  34  for the communication with the IC tag reader-writer  33 , a modulation and demodulation unit  36  for performing modulation and demodulation on the electromagnetic wave received via the antenna  35 , a sensor  37  for detecting and obtaining a physical quantity of a detection target, a memory  38  for storing information obtained by the sensor  37 , a clock  39  having a built-in timer, a power source unit  40  for supplying operation electric power, a buttery  41  for supplying electric power to the power source unit  40 , and a control unit  42  for controlling the sensor attached IC tag  30 . 
         [0041]    The modulation and demodulation unit  36  has functions of performing an appropriate conversion such as recording and transmission with respect to the transmitting and receiving signal  34  (a modulation function and a demodulation function) as well as a filter function for the communication signal  34 , whereby it is possible to remove the noise component superposed on the communication signal  34 . The memory  38  is, for example, a memory medium composed of a non-volatile memory. The control unit  42  has, for example, information necessary to control information storage procedure of the memory  38  or the like and performs a computation process. 
         [0042]    It should be noted that the sensor attached IC tag  30  adopts an active type IC tag having the built-in battery  41 , for example. Therefore, before the battery  41  is consumed up, the sensor attached IC tag  30  itself is assumed to be replaced by a new IC tag on a periodic basis. In usual cases, such a configuration is adopted if the reading signal  34  is not received from the IC tag reader-writer  33 , and the information such as the measurement result is not transmitted. 
         [0043]    On the other hand, the IC tag reader-writer  33  is provided with an antenna  45  for transmitting and receiving the communication signal  34  with the sensor attached IC tag  30 , a modulation and demodulation unit  46  for performing modulation and demodulation on the electromagnetic wave received via the antenna  45 , a power source unit  47  for supplying operation electric power, and a control unit  48  for controlling the IC tag reader-writer  33 . 
         [0044]    It should be noted that the sensor attached IC tag  30  and the IC tag reader-writer  33  perform frequency modulation or digital modulation on the electromagnetic wave to transmit and receive various signals such as data read out instruction signal and measurement results. This configuration is adopted to facilitate the distinction between the noise due to the partial discharge or the like and the necessary signal or information. 
         [0045]    In addition, the antenna  45 , the modulation and demodulation unit  46 , the power source unit  47 , and the control unit  48  of the IC tag reader-writer  33  are components performing substantially the same operation as those of the antenna  35 , the modulation and demodulation unit  36 , the power source unit  40 , and the control unit  42  of the sensor attached IC tag  30 . 
         [0046]    When the IC tag reader-writer  33  transmits the read signal serving as communication signal  34  from to the sensor attached IC tag  30 , the IC tag reader-writer  33  performs the wireless communication with the sensor attached IC tag  30  and thus can read the information from the memory  38  of the sensor attached IC tag  30 . Further, when the IC tag reader-writer  33  transmits the write signal serving as communication signal  34  from to the sensor attached IC tag  30 , the IC tag reader-writer  33  can write the information to the memory  38  of the sensor attached IC tag  30 . That is, the IC tag reader-writer  33  has both a function as an IC tag reader to read the information from the IC tag  30  and a function as an IC tag writer to write the information to the sensor attached IC tag  30 . 
         [0047]    The measurement data received by the IC tag reader-writer  33  from the sensor attached IC tag  30  is input to an upstream apparatus  50  such as a computer via a cable or a portable storage memory. 
         [0048]      FIG. 3  is an explanatory diagram for describing an example of an information configuration stored in the memory  38  of the sensor attached IC tag  30 . 
         [0049]    Examples of information stored in the memory  38  include, as illustrated in  FIG. 3 , data maximum capacity, the number of storage data, date and time of previous data deletion, a serial number (No.), the number of data storage areas (for example, 1024 areas), and identification information on the IC tag (an ID number of the IC tag). 
         [0050]    For example, in the case of the memory the memory  38  of the temperature sensor attached IC tag  30 A illustrated in  FIG. 1 , the storage is performed in such a manner that the temperature sensor is associated with one serial number, and the result of the temperature measurement at one data storage area corresponding to this serial number is associated with one serial number. In a case of the memory  38  illustrated in  FIG. 3 , as 1024 measurement results can be stored in one data storage area, it is possible to store data pieces of 1024 areas×1024 pieces if all the data storage areas are utilized. 
         [0051]    Next, a description will be given of the actions of the temperature sensor attached IC tag application insulator gas circuit breaker  1 A. 
         [0052]    First, when the contact part becomes conductive due to the switching operation of the breaker  1 A, a current I flows into the electrode units  10   a  and  10   b  (electric resistance R) connecting the breaker  1 A with another equipment. Then, an ohmic loss (resistive loss) RI 2  is caused, a temperature of the electrode units  10   a  and  10   b  is increased. As illustrated in  FIG. 1 , in the temperature sensor attached IC tag application insulator gas circuit breaker  1 A, the temperature sensor attached IC tag  30 A is mounted to the electrode unit  10   a . Therefore, the temperature sensor attached IC tag  30 A measures and obtains the temperature of the electrode unit  10   a.    
         [0053]    In the temperature sensor attached IC tag  30 A, as illustrated in  FIG. 2 , the control unit  42  controls the memory  38  to store the temperature information detected by the sensor  37  at regular time intervals through the operation with a built-in timer of the clock  39  in the memory  38  together with time information (for example, a clock time). 
         [0054]    Herein, if the memory capacity is exceeded when the information on the thus obtained physical quantities is stored as a result of the storage of the measurement results in the memory  38 , the control unit  42  controls the memory  38  to store the information on the physical quantities in accordance with previously determined certain rules. For example, in a case where 1024 (maximum number) temperature measurement results are stored, the control unit  42  performs such a control that the oldest temperature measurement result in the data storage area for the temperature measurement results is deleted and a new temperature measurement result is stored. 
         [0055]    As in the example of  FIG. 3 , when IC tag identification information (an ID number of the IC tag) is stored in the memory  38 , the IC tag reader-writer  33  permits the read or write of the physical quantity (the information of the measurement result) stored in the memory  38  on condition that one or both of the identification information of the IC tag identification information and the identification information of the IC tag reader-writer  33  are matched. 
         [0056]    That is, when the IC tag reader-writer  33  supplies the electromagnetic wave serving as a high frequency signal (communication signal)  34  from an outside of the temperature sensor attached IC tag application insulator gas circuit breaker  1 A to the temperature sensor attached IC tag  30 A, the information transmission and reception with the IC tag reader-writer  33  can be performed. In this manner, as it is possible to obtain the information of the temperature measurement result stored in the memory  38  of the temperature sensor attached IC tag  30 A by performing a remote operation for transmitting the communication signal  34  from a remote place, a user can measure the temperature and monitor the temperature sensor attached IC tag application insulator gas circuit breaker  1 A without changing the state of the temperature sensor attached IC tag application insulator gas circuit breaker  1 A. 
         [0057]    According to the temperature sensor attached IC tag application insulator gas circuit breaker  1 A, when the increase in the resistance value (the increase in the ohmic loss) due to rust or slackness of the electrode units  10   a  and  10   b  is found out by performing the monitoring on the temperature of the electrode units  10   a  and  10   b  in the switching operation, even in the high voltage hot line state, it is possible to read out the measurement results by using the IC tag reader from a place away from a critical distance (which means a distance where an electrical shock or an insulation destruction is generated) or longer. Therefore, a risk of giving the electrical shock to an inspector (user) or the like is eliminated and the safety can be increased as compared with the conventional technology. 
         [0058]    Further, according to the temperature sensor attached IC tag application insulator gas circuit breaker  1 A, in the sensor attached IC tag  30 , if data obtained by superposing time information on the electromagnetic wave for the data communication irradiated from the IC tag reader-writer  33  to the sensor attached IC tag  30  is transmitted as the communication signal  34 , the control unit  42  can recognize the time information received via the antenna  35  and the modulation and demodulation unit  36  to generate a signal for correcting the clock  39  and transmit the signal to the clock  39 . Therefore, each time the information read or write is performed at the IC tag reader-writer  33 , the time recognized by the clock  39  can be corrected to the accurate time. 
         [0059]    Furthermore, as the electromagnetic waves for the communication signal  34  such as the start instruction signal from the IC tag reader-writer  33  at the read time to the sensor attached IC tag  30  and the data from the sensor attached IC tag  30  to the IC tag reader-writer  33  are subjected to the frequency modulation or the digital modulation, the distinction between the noise due to the partial discharge or the like and the necessary signal or information can be facilitated. 
         [0060]    Next, a description will be given of another example of the temperature sensor attached IC tag application insulator gas circuit breaker  1 A. It should be noted that the same reference numerals are allocated to components substantially similar to those of the temperature sensor attached IC tag application insulator gas circuit breaker  1 A and the descriptions thereof will omitted. 
         [0061]      FIG. 4  is a vertical cross-sectional view of a temperature sensor attached IC tag application insulator gas circuit breaker  1 B according to another example (second embodiment) of the present invention. 
         [0062]    In the temperature sensor attached IC tag application insulator gas circuit breaker  1 B illustrated in  FIG. 4 , a mounting hole  55  formed into a groove shape for mounting the temperature sensor attached IC tag  30 A is provided to the electrode unit  10   a . Then, the temperature sensor attached IC tag  30 A is detachably mounted to the mounting hole  55 . Further, as illustrated in  FIG. 4 , in the temperature sensor attached IC tag application insulator gas circuit breaker  1 B, the electrostatic shielding member  31  is not mounted, and the temperature sensor attached IC tag  30 A does not have the electrostatic shield by the electrostatic shielding member  31 . 
         [0063]    According to the temperature sensor attached IC tag application insulator gas circuit breaker  1 B, even when a high voltage is applied to the breaker unit  2  during the closing (connecting) operation through the mounting of the temperature sensor attached IC tag  30 A to the mounting hole  55 , it is possible to prevent the high electric field from being applied to the antenna  35  of the temperature sensor attached IC tag  30 A. Therefore, the generation of the partial discharge starting from the antenna  35  of the temperature sensor attached IC tag  30 A can be avoided. 
         [0064]    In addition, as the electromagnetic wave serving as the communication signal  34  can be propagated through the mounting hole  55 , the temperature sensor attached IC tag  30 A can perform the communication with the IC tag reader-writer  33  located outside of the temperature sensor attached IC tag application insulator gas circuit breaker  1 B. It should be noted that other effects are similar to those of the above-mentioned case of the temperature sensor attached IC tag application insulator gas circuit breaker  1 A. 
         [0065]      FIG. 5  is a vertical cross-sectional view of a temperature sensor attached IC tag application insulator gas circuit breaker  1 C according to another example (third embodiment) of the present invention. 
         [0066]    As illustrated in  FIG. 5 , in the temperature sensor attached IC tag application insulator gas circuit breaker  1 C, the mounting hole  55  of the temperature sensor attached IC tag application insulator gas circuit breaker  1 B is provided to the lower electrode unit  10   b  as well. Further, the temperature sensor attached IC tag application insulator gas circuit breaker  1 C is constructed in such a manner that the electrostatic shielding member  31  is mounted in the vicinity of the entrance of the mounting hole  55  so that the temperature sensor attached IC tag  30 A is covered and the mounting hole  55  is clogged. 
         [0067]    According to the temperature sensor attached IC tag application insulator gas circuit breaker  1 C, the temperature sensor attached IC tag  30 A is physically covered by the electrostatic shielding member  31  to effect the electrostatic shielding, and therefore a higher electrostatic shielding effect is expected as compared with the temperature sensor attached IC tag application insulator gas circuit breaker  1 B. It should be noted that other effects are similar to those of the case of the temperature sensor attached IC tag application insulator gas circuit breaker  1 B. 
         [0068]      FIG. 6  is a vertical cross-sectional view of a temperature sensor attached IC tag application insulator gas circuit breaker  1 D according to another example (fourth embodiment) of the present invention. 
         [0069]    In comparison to the temperature sensor attached IC tag application insulator gas circuit breaker  1 A illustrated in  FIG. 1 , the temperature sensor attached IC tag application insulator gas circuit breaker  1 D is constructed in such a manner that instead of using the electrostatic shielding member  31 , the temperature sensor attached IC tag  30 A is covered with an electrostatic shielding member  58  processed into a special shape for the electrostatic shielding. 
         [0070]    The electrostatic shielding member  58  is made of a metal and constructed so that, as illustrated in  FIG. 6 , its distal end is processed to be rounded. Further, the electrostatic shielding member  58  is mounted to the upper electrode unit  10   a  with a clearance with respect to the upper electrode unit  10   a.    
         [0071]    According to the temperature sensor attached IC tag application insulator gas circuit breaker  1 D, as illustrated in  FIG. 6 , while the temperature sensor attached IC tag  30 A is covered with the metal electrostatic shielding member  58  processed into the special shape, even in a state where a voltage of a commercial frequency or lightning surge enters into the line, it is possible to prevent a high electric field from being applied to the temperature sensor attached IC tag  30 A. Therefore, the destruction of the temperature sensor attached IC tag  30 A and the generation of the partial discharge starting from the antenna  35  of the temperature sensor attached IC tag  30 A can be avoided. 
         [0072]    In addition, the electric wave can be propagated through the clearance between the electrostatic shielding member  58  and the upper electrode unit  10   a , the temperature sensor attached IC tag  30 A can communicate with the IC tag reader-writer  33  located outside the temperature sensor attached IC tag application insulator gas circuit breaker  1 D. 
         [0073]    As described above, according to the present invention, the sensor attached IC tag  30  detachably mounted in the present invention can transmit sensor output results serving as the measurement result stored in the memory  38  to the IC tag reader when the read out signal is received from the IC tag reader. Alternatively, upon receiving the read out signal from the IC tag reader, the sensor attached IC tag  30  detachably mounted in the present invention can transmit the information, detected the sensor output results and then stored the sensor output results with the time information in the memory  38  at certain time interval, to the IC tag reader. Thus, the risk of giving the electrical shock to the inspector (user) or the like is eliminated and the safety can be increased as compared with the conventional technology. In addition, the inspection time and the inspection costs can be reduced. 
         [0074]    Furthermore, the information where the progress data on the temperature or the partial discharge recorded up until this time point by the sensor attached IC tag  30  and stored in the memory  38  can be transmitted to the IC tag reader, and therefore the change in the electric contact state at the contact part can be checked during the routine inspections. 
         [0075]    Moreover, by using the sensor attached IC tag  30  additionally having a temperature sensor for measuring an atmospheric temperature in addition to the temperature sensor for measuring the temperature of the electrode unit  10   a , the temperature rise state can be determined on the basis of comparison with the two temperature sensors and the time series comparison can be performed. From this comparison result, as it is possible to understand whether the change is suddenly or gradually developed, the abnormal state can be diagnosed in detail. It should be noted that these pieces of information are transmitted and received by way of the electric waves, and even when the sensor is covered with the insulating member through which the electric waves transmit, the transmission of the measurement results of the temperature or the partial discharge can be performed. 
         [0076]    On the other hand, when a sensor for measuring the partial discharge is mounted as the sensor of the sensor attached IC tag  30 , unlike the conventional technology, a large scale apparatus does not need to be externally mounted for measuring the partial discharge, and the partial discharge measurement can be facilitated. Further, as the partial discharge can be measured at a large number of points at the same time, the partial discharge generation position can be easily identified by performing the switching operation. 
         [0077]    It should be noted that according to the above description, the case where the sensor attached IC tag application high voltage equipment according to the present invention is the temperature sensor attached IC tag application insulator gas circuit breaker  1 A has been described, but a plurality of the sensor of the sensor attached IC tags of the same type may be mounted in some cases as illustrated in  FIG. 5 . In addition, the sensor may include the partial discharge alone or both the temperature sensors and the partial discharge. 
         [0078]    According to the above description, the case of the active type in which the sensor attached IC tag  30  is provided with the battery  41  has been described, but such a case is also considerable that instead of using the battery  41 , a large volume capacitor such as a high speed chargeable accumulator battery (rechargeable battery) or an electric double layer capacitor is used. When the sensor attached IC tag  30  is provided with the accumulator battery or the like, the charging can be performed through the periodic irradiation of the electromagnetic wave, and therefore it is possible to obtain the similar actions and effects to those of the active type in which the sensor attached IC tag  30  is provided with the battery  41 . 
         [0079]    In addition, the mounting position of the sensor attached IC tag  30 A may be different from the position illustrated in  FIG. 1  in some cases, but the similar effects are obtained. More specifically, the similar effects can be obtained even in a case where the sensor attached IC tag  30 A is mounted to the lower electrode unit  10   b  as illustrated in  FIG. 5 , a case where the sensor attached IC tag  30 A is mounted to the fixed contact  11  as the high voltage unit (fifth and sixth embodiments) as illustrated in  FIGS. 7 and 8 , and a case where the sensor attached IC tag  30 A is mounted to the slide contact unit  23  as the high voltage unit (seventh embodiment) as illustrated in  FIG. 9 . Here, the temperature sensor attached IC tag application insulator gas circuit breaker  1 C illustrated in  FIG. 7  is a fifth embodiment of the temperature sensor attached IC tag application insulator gas circuit breaker according to the present invention. Further, the temperature sensor attached IC tag application insulator gas circuit breaker  1 B illustrated in  FIG. 8  is a sixth embodiment of the temperature sensor attached IC tag application insulator gas circuit breaker. 
         [0080]    Furthermore, such a case is also considerable that the sensor attached IC tag application high voltage equipment is a disconnecting switch. The actions and effects are similar to those in the case of the temperature sensor attached IC tag application insulator gas circuit breaker  1 A. 
         [0081]    On the other hand, the sensor attached IC tag application high voltage equipment may be a high voltage equipment for an electric power which is not provided with the switching unit  2  for performing the electric path switching. However, the similar actions and effects to those of the temperature sensor attached IC tag application insulator gas circuit breaker  1 A can be obtained, for example, in a case where the sensor attached IC tag application high voltage equipment is a current extraction apparatus of the gas insulation bus (bushing)  1 F (first and second embodiments) as illustrated in  FIGS. 10 and 11  and in a case where the sensor attached IC tag application high voltage equipment is a lightning arrester  1 G having a lightning arrester element  60  that is a nonlinear resistor element arranged in the porcelain tube  3  as illustrated in  FIG. 12 . 
         [0082]    Herein, in  FIGS. 10 and 11 , reference numeral  61  denotes an insulating spacer, reference numeral  62  denotes a high voltage conductor, and reference numeral  63  denotes a metal sealed tank. Further, in  FIG. 12 , reference numeral  64  denotes an electrostatic shielding member and reference numeral  65  denotes a grounded conductor. 
         [0083]    It should be noted that according to the present invention, the write to the sensor attached IC tag  30  may not necessarily be performed. Therefore, the IC tag reader-writer  33  may be an IC tag reader that only reads out the information stored in the sensor attached IC tag  30 . 
         [0084]    Moreover, the present invention is not limited to the disclosed exemplary embodiments, and the components can be changed and embodied without departing the gist in the embodiment stages. That is, various inventions may be formed by appropriately combining some components disclosed in the respective embodiments or deleting some components from all the disclosed components.