JP4875872B2 - Protective device and protective device deterioration detection system using the same - Google Patents

Description

  The present invention relates to a protector with a deterioration state detection function for remotely monitoring a deterioration state of a protector that protects equipment and the like from lightning surges, and a protector deterioration detection system using the same.

  In the power line and the communication line, a protector is disposed to protect equipment and the like from an overcurrent lightning surge. The protector is composed of, for example, an arrester, a varistor, or the like, and operates to discharge a lightning surge entering the power line or the communication line to the ground (ground). When arresters, varistors, etc. deteriorate due to repeated energization of excessive current, the function is lost and the equipment and the like are not protected. Therefore, a protector with a deterioration detection function has been proposed in order to perform maintenance (maintenance inspection) such as periodically checking the performance of the protector and replacing it as necessary.

  This type of protector has a structure in which a deterioration state is detected by a leakage current, and the detection result is turned on by a display unit such as a light emitting diode (LED) provided in the protector housing, or a lightning surge is received. There are those that count (count) the number of times and display the count number on a display unit provided in the protector housing.

  However, in this kind of protector, since the deterioration state is confirmed by visually observing the display part of the protector, there are the following problems. That is, the maintenance person moves to a place where the protector is set and checks the display unit of the protector. There are cases where a large number of protective devices are accommodated in multiple stages vertically and horizontally in a large storage rack, etc. In this case, when checking the upper protective device, prepare a stepladder and go up the stepladder to display the protective device. There is an inconvenience that the part must be visually checked, and the work is troublesome and time-consuming. Also, when the protector is installed in a narrow place where people cannot enter or is integrated with other devices, it takes time to check the display of the protector.

  Therefore, in order to eliminate such inconvenience, for example, in Patent Documents 1 to 3 below, a protective device is provided with a communication function, deterioration information is transmitted to the outside, and this is received by an external monitoring device for security. The deterioration state of the vessel is monitored.

JP-A-8-178990 JP 2001-23479 A JP 2004-37169 A

  However, the conventional protector with a communication function as disclosed in Patent Documents 1 to 3 and the protector deterioration detection system using the same have the following problems (a) to (c).

  (A) In a conventional protective device with a communication function, if the protective device itself such as an arrester or a varistor deteriorates, the entire protective device with a communication function must be replaced. It is complicated.

  (B) Some external monitoring devices, for example, have a configuration that collects deterioration information from all the protectors by performing 1: 1 wireless communication with the protectors. However, in such a system, it is difficult to reach the radio. Deterioration information when there is a protector in place (for example, when the protector is installed inside a metal cubicle etc. and shielded, or behind a device or wall, etc., wireless communication is not possible) There are concerns about the collection omission.

  (C) In the conventional protector deterioration detection system, it is difficult to collect deterioration information from the protector with a relatively simple configuration, reliability, and efficiency.

  The protector according to the first aspect of the present invention includes a jack connected to a track of a protected device, a plug detachably attached to the jack, and a detachably attached to the plug. A wireless control unit.

  The plug includes a safety circuit that discharges a lightning surge entering the line to the ground, and a deterioration detection circuit that detects a deterioration state of the safety circuit based on a control signal and outputs the deterioration information. Further, the wireless control unit receives a data request signal sent from outside by radio waves, and when the data request signal is addressed to itself, gives the control signal to the deterioration detection circuit and outputs it from the deterioration detection circuit The deteriorated information is transmitted to the outside by radio, and when the data request signal is not addressed to itself, the received data request signal is transferred to the outside by radio.

  The protector of the invention according to claim 2 includes a jack connected to the line of the protected device, and a safety circuit that is detachably attached to the jack and discharges a lightning surge entering the line to the ground. A plug and a wireless control unit detachably attached to the plug are provided.

  The wireless control unit receives a deterioration detection circuit that detects a deterioration state of the security circuit based on a control signal and outputs the deterioration information, and a data request signal transmitted from outside by radio waves, and the data request signal Is sent to the degradation detection circuit by giving the control signal to the degradation detection circuit, and when the data request signal is not addressed to the self, A wireless unit that wirelessly transfers a data request signal to the outside.

  A protector deterioration detection system according to a third aspect of the invention includes the protector according to the first or second aspect and an operation terminal. The operation terminal is a terminal that, when collecting the deterioration information in the protector, transmits the data request signal wirelessly and receives the deterioration information returned wirelessly in response thereto.

  The protector deterioration detection system of the invention according to claim 4, when collecting the deterioration information in the protector according to claim 1 or 2 and the protector, wirelessly transmits the data request signal and responds thereto An operation terminal that receives the deterioration information sent back wirelessly and a relay terminal that receives the data request signal and the deterioration information sent wirelessly and transfers them wirelessly.

  In the protector deterioration detection system according to the fifth aspect of the present invention, ad-hoc communication or multi-hop communication is used as the wireless communication method according to the third or fourth aspect.

  According to the first and second aspects of the invention, the maintenance person can collect the deterioration information of the protective device remotely from the remote terminal without going to the vicinity of the protective device, for example. Since the protectors that must be identified can be identified, maintenance time can be greatly reduced. In particular, if the deterioration detection is performed when there is a data transmission request from the outside, it is possible to suppress the deterioration of the protector, reduce the power consumption, and the like. Further, when a plug having a security circuit deteriorates, it can be easily repaired by simply pulling out the plug from the jack and inserting a new plug into the jack. At this time, as long as the jack and the wireless control unit are not broken, they can be used as they are, so there is no waste.

  According to the inventions according to claims 3, 4 and 5, the deterioration information of all the protectors is transmitted from the operation terminal directly or via the relay terminal to the protectors having the wireless communication function arranged in a plurality of places. Since the information is collected, deterioration information from all the protectors can be collected with a relatively simple configuration, high reliability, and efficiency. In particular, if the information is transmitted by ad hoc communication or multi-hop communication, even if there is a wireless communication obstacle on the transmission path, the information can be received via an intermediate protector or relay terminal. The collection omission can be greatly reduced.

  In the protector deterioration detection system, when collecting the deterioration information in the protector having a wireless communication function and the protector, the data request signal is transmitted wirelessly, and the wirelessly returned data is returned in response to the data request signal. An operation terminal that receives deterioration information, and a relay terminal that receives the data request signal and the deterioration information transmitted wirelessly and transfers them wirelessly.

(Configuration of Example 1)
FIGS. 1A to 1D are schematic configuration diagrams of a protector with a deterioration state detection function showing a first embodiment of the present invention. FIG. 1A is an overall circuit diagram, FIG. ) Is a circuit diagram of the safety circuit in FIG. 1A, FIG. 1C is a circuit diagram of a deterioration detection circuit in FIG. 1A, and FIG. 1D is a control in FIG. It is a circuit diagram of a circuit.

  A protector 1 with a deterioration state detection function shown in FIG. 1A is a power line or a communication line (hereinafter simply referred to as “line”) in order to protect a protected device (for example, equipment) from a lightning surge. Connected to L1 and L2, for example, comprises a safety circuit 10, a deterioration detection circuit 20, a control circuit 30, and a radio 40.

  The safety circuit 10 is a circuit that discharges a lightning surge entering the lines L1 and L2 to the ground, and a deterioration detection circuit 20 is connected to the safety circuit 10. The deterioration detection circuit 20 is a circuit that detects the deterioration state of the safety circuit 10 based on a control signal supplied from the control circuit 30 and outputs the deterioration information when a data request is received from the outside. A radio device 40 is connected to the circuit 20 via a control circuit 30. The control circuit 30 is a circuit that controls the deterioration detection circuit 20 and the wireless device 40, and includes a low power consumption type one-chip microcomputer (hereinafter referred to as “one-chip microcomputer”).

  The wireless device 40 is not a normal 1: 1 wireless communication method, but, for example, an ad hoc wireless communication method or a multi-hop wireless communication method using a reactive or proactive routing protocol. When the data request signal sent from the outside is received by the antenna 41 and the data request signal is addressed to itself, the deterioration information output from the deterioration detection circuit 20 is transmitted to the outside, and the data request signal is not addressed to itself. Sometimes it is a circuit that forwards (relays) the received data request signal to the outside, and is a small and low power consumption radio circuit (for example, radio frequency is 2.45 GHz, radio wave reach is about 10 meters in line of sight) It is configured.

  The safety circuit 10 shown in FIG. 1 (A) is composed of various circuits such as arresters and varistors, and operates to discharge a lightning surge to the ground. This circuit configuration example is shown in FIG. 1 (B). Has been. The safety circuit 10 in FIG. 1B is constituted by an arrester 11 connected between the lines L1 and L2, and this arrester 11 is connected to the ground by a ground wire G. When a lightning surge enters the lines L1 and L2, this lightning surge current is discharged to the ground by the ground wire G to protect equipment not shown.

  The degradation detection circuit 20 shown in FIG. 1A is a Zp type that detects degradation by disconnection of a fuse, or counts the number of operations that have been operated in response to a lightning surge and displays the count as degradation information. The circuit is composed of various circuits such as a surge counter type, and an example of this circuit structure is shown in FIG. The deterioration detection circuit 20 of FIG. 1C is a Zp type circuit, and a fuse 21 is connected in series to the ground wire G, and a series circuit of a resistor 22 and a battery 23 is connected in parallel to the fuse 21. It is connected. In this type of deterioration detection circuit 20, when the arrester 11 deteriorates and exceeds an allowable value, the fuse 21 connected to the arrester 11 is cut, so that the arrester 11 is detected from the detection voltage Vout = 0 that is the voltage difference between both ends of the fuse 21. It is possible to detect the deterioration state.

  A control circuit 30 shown in FIG. 1A is a circuit that controls the radio device 40 and the like according to a communication protocol of an ad hoc radio communication system or a multi-hop radio communication system. An example of this circuit configuration is shown in FIG. ing. The control circuit 30 shown in FIG. 1D is composed of a one-chip microcomputer. This one-chip microcomputer has an internal bus 31, by which a central processing unit (hereinafter referred to as “CPU”) 32 and a nonvolatile memory for storing data (for example, 256 bytes of electrical erasable are possible). EEPROM 33), an analog / digital converter (hereinafter referred to as "A / D converter") 34, an input port 35, and an output port 36 are connected to each other.

  The CPU 32 controls the radio device 40 according to the communication protocol stored in the memory 33. The A / D converter 34 is a circuit that is controlled by the CPU 32 and converts an analog deterioration detection voltage Vout = 0, which is deterioration information output from the deterioration detection circuit 20, into a digital value. The input port 35 is controlled by the CPU 32 and inputs a data request signal and the like received by the wireless device 40 to the control circuit 30. The output port 36 is controlled by the CPU 32 and outputs the internal data of the control circuit 30 to the wireless device 40.

(Operation of Example 1)
In FIG. 1C, when a high-voltage lightning surge enters the lines L 1 and L 2, the arrester 11 operates and the lightning surge current is discharged to the ground via the ground wire G and the fuse 21. Therefore, equipment (not shown) connected to the lines L1 and L2 is protected from lightning surge. The arrester 11 deteriorates depending on the number of operations. When the deterioration state of the arrester 11 exceeds the allowable value, the fuse 21 connected thereto is cut. When the fuse 21 is disconnected, the degradation detection voltage Vout is difference in voltage across the fuse 21 becomes E _0.

When there is a data request from an external wireless terminal or the like in order to collect the deterioration information of the protector 1, this data request signal is received by the wireless device 40 via the antenna 41 and demodulated, and input to the control circuit 30. It is sent to the CPU 32 via the port 35. The CPU 32 operates the A / D converter 34 in response to the demodulated data request signal. The analog deterioration detection voltage Vout = E ₀ is converted into a digital value = 1 by the A / D converter 34, and this digital value = 1 is stored in the memory 33. The CPU 32 reads the digital value stored in the memory 33, detects that the arrester 11 has deteriorated when this digital value is 1, and outputs this deterioration information from the output port 36.

  The deterioration information output from the output port 36 is modulated by the radio device 40 and transmitted from the antenna 41. By receiving this transmission signal by an external wireless terminal or the like, deterioration information of the protector 1 can be collected at a remote place.

(Effect of Example 1)
For example, the maintenance person can collect the deterioration information of the protector 1 from a remote terminal without going to the vicinity of the protector 1, and can identify the protector 1 that needs to be replaced immediately. Therefore, maintenance time can be greatly shortened. In particular, if the deterioration detection is performed when there is a data request from the outside, it is possible to suppress the deterioration of the protector 1, reduce the power consumption, reduce the capacity of the memory 33, and the like.

  2A and 2B are other circuit configuration diagrams of the safety circuit and the deterioration detection circuit in the protector showing the second embodiment of the present invention, and FIG. 2A is a circuit diagram of the safety circuit, and FIG. FIG. 5B is a circuit diagram of the deterioration detection circuit.

  A safety circuit 10A shown in FIG. 2A includes an arrester 11 and a varistor 12, and the arrester 11 and the varistor 12 are connected in series between the lines L1 and L2.

  In this type of safety circuit 10A, for example, the line L2 is connected to the ground, and a lightning surge that has entered the line L1 is discharged to the ground via the arrester 11 and the varistor 12. Even if such a safety circuit 10A is mounted on the safety device 1 of FIG. 1A, the same effects as those of the safety device 1 of the first embodiment can be obtained.

  A deterioration detection circuit 20A shown in FIG. 2B is a surge counter type circuit, and a lightning surge current detection coil 24 wound around a ground wire G and a lightning surge current detected by the coil 24 are detected. It comprises a resistor 25 that outputs in the form of a detection voltage Vout.

  When this type of deterioration detection circuit 20A is mounted on the protector 1 of FIG. 1A, for example, the detection voltage Vout is converted into a digital value by the A / D converter 34 in the control circuit 30, and the CPU 32 The number of operations is counted by comparison with a reference value, and this count value is stored in the memory 33. When there is a data request from the outside, the CPU 32 reads the count value in the memory 33, detects that the arrester 11 has deteriorated when this count value exceeds the allowable value, and outputs this deterioration information. Output from port 36. Thereby, the effect similar to the protector 1 of Example 1 is acquired.

(Configuration of Example 3)
3 (A) to 3 (C), FIG. 4, FIG. 5 (A), (B), and FIG. 6 are configuration diagrams showing specific structural examples of the protector showing Embodiment 3 of the present invention. Elements common to those in FIGS. 1 and 2 showing the first and second embodiments are denoted by the same reference numerals.

  3-6 of the present Example 3 show the specific structural example of the protector 1 of FIG. 1 (A). 3A to 3C are configuration diagrams of the appearance of the protector 1 of FIG. 1A, where FIG. 3A is a front view, FIG. 3B is a plan view, and FIG. FIG. 3C is a left side view. FIG. 4 is a separation view of FIG. 5 (A) and 5 (B) are separated views of FIG. 3 (A), FIG. 5 (A) is a partially cutaway view of FIG. 3 (A), and FIG. 5 (B) is a right side view. It is.

  The protector 1 according to the third embodiment includes a jack 50 connected to the lines L1 and L2 and the ground wire G, a plug 70 that is removably inserted into the jack 50, and an insert into the plug 70. It is comprised by the radio | wireless control part 90 inserted detachably.

  The jack 50 has, for example, a case body 51 for housing components mounted on the DIN rail 2, and an opening is provided on one side surface of the case body 51. A printed circuit board 52 is provided in the case body 51, and a terminal block 53 and a connector 54 for inserting a terminal portion on the plug 70 side are attached on the printed circuit board 52. The terminal block 53 is provided with a plurality of terminals for the lines L1 and L2, the lines T1 and T2, and the ground wires G and G. On the side surface of the terminal block 53, a terminal display nameplate 53a and a ground terminal display nameplate 53b are provided. It is attached. A ground plate 55 and a rail stopper 56 for attaching to the DIN rail 2 are provided on the bottom side of the case body 51, and the rail stopper 56 and the ground plate 55 are in contact via a spring 57.

  On the printed circuit board 52, resistors 58 and 59 are mounted and a ground wire 60 is connected. The resistor 58 is connected between the line L1 terminal and the line T1 terminal, and electrodes at both ends of the resistor 58 are connected to the connector 54. The resistor 59 is connected between the line L2 terminal and the line T2 terminal, and electrodes at both ends of the resistor 59 are connected to the connector 54. A ground wire 60 connects the ground wire G, the terminal for G, and the connector 54. The opening of the case body 51 for storing them is closed by a lid 61 fixed with screws.

  The plug 70 has a case body 71 that houses the safety circuit 10 and a part of the deterioration detection circuit 20 in FIG. 1A, and a printed circuit board 72 is fixed in the case body 71 by a tapping screw 73. . A terminal portion 72a for insertion into the connector 54 on the jack 50 side protrudes from the lower end portion of the printed circuit board 72, and a contact pin on the wireless control unit 90 side is inserted into the upper end portion of the printed circuit board 72. A receptacle 74 is attached. On the printed circuit board 72, the arrester 11 constituting the safety circuit 10, the fuses 21 and 75, the resistor 76 and the Zener diodes 77 to 80 constituting a part of the deterioration detection circuit 20 are mounted.

  The electrodes at both ends of the arrester 11 are connected to the terminal portion 72 a, and the ground-side electrode of the arrester 11 is connected to the terminal portion 72 a through one electrode of the fuse 21 and the other electrode of the fuse 21. . One electrode of the fuse 21 is connected to one electrode of the fuse 75, and the other electrode of the fuse 75 is connected to the terminal portion 72 a via two-stage series Zener diodes 77 and 78, and It is connected to the terminal portion 72a via serial Zener diodes 79 and 80. The other electrode of the fuse 21 is connected to the receptacle 74 via the resistor 76, and the other electrode of the fuse 75 is connected to the receptacle 74.

  The wireless control unit 90 includes a case body 91 that houses a part of the deterioration detection circuit 20 in FIG. 1A, the control circuit 30, the wireless device 40, and the antenna 41. Is attached. On the printed circuit board 92, a contact pin 93 for insertion into the receptacle 74 on the plug 70 side, a battery 23 for power supply that constitutes a part of the deterioration detection circuit 20, resistors 94 to 96, a comparator circuit 97, and a control A circuit 30 and a radio device 40 with an antenna 41 are mounted.

  The negative electrode of the battery 23 is connected to the contact pin 93, and the positive electrode of the battery 23 is one electrode of the resistor 94, one electrode of the resistor 96, the power supply electrode of the comparator circuit 97, the power supply electrode of the control circuit 30, and the radio device. It is connected to 40 power electrodes. The other electrode of the resistor 94 is connected to the contact pin 93 via the resistor 95 and also connected to one input terminal of the comparator circuit 97. The other electrode of the resistor 96 is connected to the contact pin 93 and also connected to the other input terminal of the comparator circuit 97. The comparator circuit 97 is a circuit that obtains a difference between voltages input from two input terminals and outputs a detection voltage Vout for detecting deterioration of the arrester 11 due to cutting of the fuse 21 to the control circuit 30. 97 and the control circuit 30 are constituted by, for example, a one-chip microcomputer 30A.

(Operation of Example 3)
In the protector 1 of the third embodiment, when a high-voltage lightning surge enters the lines L1 and L2, the arrester 11 operates, and the lightning surge current is discharged to the ground through the fuse 21 and the ground wires 60 and G. And flows to the lines L1 and L2 via the fuse 75 and the zener diodes 79-80. Therefore, equipment (not shown) connected to the lines L1 and L2 is protected from lightning surge. When the deterioration state of the arrester 11 exceeds an allowable value, the fuses 21 and 75 connected thereto are cut. When the fuses 21 and 75 are cut, the detection voltage Vout applied between the two input terminals of the comparator circuit 97 is detected and held by the comparator circuit 97.

  When there is a data request from an external wireless terminal or the like to collect the deterioration information of the protector 1, the data request signal is received by the wireless device 40 via the antenna 41 and sent to the CPU 32. The CPU 32 operates the A / D converter 34 in response to the data request signal. The analog detection voltage Vout held in the comparator circuit 97 is converted into a digital value by the A / D converter 34 and stored in the memory 33. The CPU 32 reads the digital value stored in the memory 33, detects that the arrester 11 has deteriorated from this digital value, and outputs this deterioration information from the output port 36. Since the deterioration information is modulated by the radio 40 and transmitted from the antenna 41, the deterioration information of the protector 1 can be collected at a remote place by receiving this transmission signal by an external wireless terminal or the like.

(Effect of Example 3)
In the case of the third embodiment, the same effects as in the first embodiment can be obtained, and when the plug 70 having the arrester 11, the fuses 21, 75, etc. deteriorates, the plug 70 is pulled out from the jack 50 and a new plug is attached. Simply plug it into the jack 50 and you can easily repair it. At this time, as long as the jack 50 and the wireless control unit 90 are not broken down, they can be used as they are, so there is no waste.

(Configuration of Example 4)
FIGS. 7-9 is a schematic block diagram which shows the structural example of the protector degradation detection system in Example 4 of this invention using the protector 1 of Example 1, 2 or 3. FIG. These FIG. 7 to FIG. 9 show system diagrams for collecting deterioration information of a plurality of protectors 1-1 to 1-9 installed in an information machine room or the like using the operation terminal 100, for example. Yes.

  In the protector deterioration detection system of FIG. 7, each protector 1-1 to 1-9 has the same configuration as the protector 1 of FIG. 1 (A), and responds to a data request from the operation terminal 100, Deterioration information (for example, serial number (S / N), date of manufacture, date of installation, maintenance history, etc.) stored in the memory 33 by operating the ad hoc communication protocol or multi-hop communication protocol on the one-chip microcomputer 30A. Is transmitted to the operation terminal 100. The maintenance history includes a maintenance date, deterioration detection history (OK / NG, surge count number that is the number of operations, leakage current value, etc.), operator identification (ID) number, and the like. The serial number (S / N) is necessary for determining communication order and for data management because a plurality of terminals try to communicate at the same time.

  The operation terminal 100 receives and collects deterioration information sent from the protectors 1-1 to 1-9 and the like, and the collected deterioration information is connected to a personal computer (hereinafter referred to as “personal computer”) via a serial communication connector or the like. Is a portable device that can be transmitted to an external device, and is provided with an operation unit 101 such as a keyboard and a display unit 102 such as a liquid crystal screen on the outside, and is configured by a microcomputer having a communication device and a nonvolatile memory such as a flash memory inside. A communication control circuit and the like are provided. By operating the operation unit 101, data of a specific serial number (S / N) and deterioration of all the protectors 1-1 to 1-9 in a service area (hereinafter simply referred to as “area”) that is a communicable area. Information (OK, NG, etc.) can be selected and collected, and deterioration information after collection can be displayed on the screen of the display unit 102. In the operation terminal 100, for example, an ad hoc communication protocol or a multi-hop communication protocol is operated on a microcomputer, and the collected deterioration information is stored in an internal memory.

  In the protector deterioration detection system of FIG. 8, for example, radio waves do not reach directly from the operation terminal 100 to the protectors 1-4 to 1-7 housed in a metal casing 110 such as a cubicle. Degradation information is collected via.

  The relay terminal 120 is a device that relays data by installing it at an appropriate location when radio communication is obstructed due to the radio wave being blocked due to the location of the protectors 1-4,. The communication control circuit includes a communication device that performs wireless communication with other terminals, a non-volatile memory such as a flash memory (a storage capacity of, for example, 256 bytes), and a microcomputer. In this relay terminal 120, for example, an ad hoc communication protocol or a multi-hop communication protocol is operated on the microcomputer, and relaying is performed to send deterioration information sent from the protectors 1-4,... To the operation terminal 100. . The serial number (S / N), date of manufacture, date of installation, etc. are stored in the memory in the repeater 120.

  In the protector deterioration detection system of FIG. 9, for example, due to the structure of an information machine room or the like, even when the protectors 1-6 to 1-9 are shielded by the shield 111 and the radio waves do not reach directly from the operation terminal 100, The deterioration information of the protectors 1-6 to 1-9 can be collected through the protectors 1-1 and 1-4. When radio interference occurs, the relay terminal 120 may be installed near the shield 111.

(Operation of Example 4)
(1) Operation when data is requested from the operation terminal A to all the protectors B,..., X FIG. 10 is a flowchart showing processing of each protector in FIG. 11 (1) to 11 (6) are explanatory diagrams when data is requested from the operation terminal A to all the protectors B,.

  In FIG. 11A, A corresponds to the operation terminal 100, and B to X correspond to the protectors 1-1 to 1-23, respectively. When operating the operation terminal A to collect deterioration information of all the protectors B to X, a data request signal is transmitted from the operation terminal A to the protectors B,. On the way, the protectors C,... Return deterioration information if they are data requests addressed to themselves, and if they are not addressed to themselves, store the request number in the memory 33 and transmit the same data request signal.

The communication data and format example at this time are as follows, for example.
Request signal + request number + request source ID + request destination ID + transit route + request details
Re (Request) 0001 A ALL (all) Data request
An (Answer) 0001 AD BC NG

  The protector B,... (Or the relay terminal) has, for example, a 256-byte memory and stores a request number. If a data request with the same request number is received again, nothing is done.

Hereinafter, it demonstrates in detail, referring FIG. 10, FIG. 11 (1)-(6).
First, in FIG. 11 (1), when the following data request signal is transmitted from the operation terminal A, the protectors B, G, and H existing in the same area as the operation terminal A receive.
Request signal + request number + request source ID + request destination ID + transit route + request content
Re (Request) 0001 A ALL Data request

  Since the request destination is ALL (all), the protectors B, G, and H return their own deterioration information. After that, the same data request is retransmitted with its own ID added to the passage route.

  As shown in FIG. 11 (2), the protector H returns its own deterioration information (steps S1, S2, S3, S5 and S6 in FIG. 10), and further adds its own ID (H) to the progress information. Add and retransmit (steps S1, S2, S3, S5, S6, S14, S7 in FIG. 10).

That is, since the request destination ID is ALL, the protector H puts its own ID in the request destination ID and returns the data based on the request as follows.
Request signal + request number + request source ID + request destination ID + transit route + request details
An (Answer) 0001 AHH data

  The reply data of the protector H is received by the operation terminal A and the protectors B, C, G, I, M, N, and O existing in the same area. The protectors B, C, G, I, M, N, and O do nothing because the request signal is An and there is no ID in the passage route (steps S1, S2, S8, S10, and S13 in FIG. 10). ). The operation terminal A receives the deterioration information because the request signal is An and the request source is itself.

Since the requester ID is ALL, the protector H puts its own ID in the passage route and re-transmits as follows.
Request signal + request number + request source ID + request destination ID + transit route + request content
Re (Request) 0001 A ALL H Data request

  The retransmitted data of the protector H is received by the operation terminal A and the protectors B, C, G, I, M, N, and O existing in the same area. Since the operation terminal A and the protectors B and G are already processed request numbers, nothing is done (steps S1, S2, S3 and S4 in FIG. 10). Since the request destinations are ALL, the protectors C, I, M, N, and O return their own deterioration information (steps S1, S2, S3, S5, and S6 in FIG. 10), and then use their own IDs as a passage route. Add and retransmit (steps S1, S2, S3, S5, S6, S14, S7 in FIG. 10).

  As shown in FIG. 11 (3), the protector O returns its own deterioration information (steps S1, S2, S3, S5, and S6 in FIG. 10), and further adds its own ID (O) to the progress information. Add and retransmit (steps S1, S2, S3, S5, S6, S14, S7 in FIG. 10).

That is, since the request destination ID is ALL, the protector O puts its own ID into the request destination ID and returns data based on the request as follows.
Request signal + request number + request source ID + request destination ID + transit route + request details
An (Answer) 0001 AOHO data

  The reply data of the protector O is received by the protectors H, I, J, N, P, T, U, and V existing in the same area. Since the request signal is ALL, the protector O replies with its own ID as the request destination ID. The protector H re-transmits the deterioration information as it is because the request signal is An and its own ID is in the passage route (steps S1, S2, S8, S10, S11, S12 in FIG. 10). The protectors I, J, N, P, T, U, and V do nothing because the request signal is An and there is no ID in the passage route (steps S1, S2, S8, S10, and S13 in FIG. 10). ).

Since the requester ID was ALL, the protector O puts its ID in the passage route and re-transmits as follows.
Request signal + request number + request source ID + request destination ID + transit route + request content
Re (Request) 0001 A ALL HO Data request

  The retransmitted data of the protector O is received by the protectors H, I, J, N, P, T, U, and V existing in the same area. Since the protectors H, I and N are already processed request numbers, nothing is done (steps S1, S2, S3 and S4 in FIG. 10). Since the request destinations of the protectors J, P, T, U, and V are ALL, after returning their own data (steps S1, S2, S3, S5, and S6 in FIG. 10), their own IDs are added to the passage route. And re-transmitting (steps S1, S2, S3, S5, S6, S14, S7 in FIG. 10).

  As shown in FIG. 11 (4), the protector V returns its own deterioration information (steps S1, S2, S3, S5 and S6 in FIG. 10), and further, its own ID (V) is added to the progress information. Add and retransmit (steps S1, S2, S3, S5, S6, S14, S7 in FIG. 10).

That is, since the request destination ID is ALL, the protector V puts its own ID in the request destination ID and returns the data based on the request as follows.
Request signal + request number + request source ID + request destination ID + transit route + request details
An (Answer) 0001 AV HO V data

  The reply data of the protector V is received by the protectors O, P, Q, U, and W existing in the same area. Since the request signal is An and there is its own ID in the passage route, the protector O retransmits the data as it is (steps S1, S2, S8, S10, S11, S12 in FIG. 10). The protectors P, Q, U, and W do nothing because the request signal is An and there is no ID in the passage route (steps S1, S2, S8, S10, and S13 in FIG. 10).

Since the request destination ID is ALL, the protector V puts its ID in the passage route and re-transmits as follows.
Request signal + request number + request source ID + request destination ID + transit route + request content
Re (Request) 0001 A ALL HOV Data request

  The retransmitted data of the protector V is received by the protectors O, P, Q, U, and W existing in the same area. Since the protectors O, P, U are already processed request numbers, nothing is done (steps S1, S2, S3, S4 in FIG. 10). Since the request destinations are ALL, the protectors Q and W send back their own deterioration information (steps S1, S2, S3, S5, and S6 in FIG. 10), and then retransmit by adding their IDs to the passage route. (Steps S1, S2, S3, S5, S6, S14, S7 in FIG. 10).

  As shown in FIG. 11 (5), the protector W returns its own deterioration information (steps S1, S2, S3, S5, and S6 in FIG. 10), and further adds its own ID (W) to the progress information. Add and retransmit (steps S1, S2, S3, S5, S6, S14, S7 in FIG. 10).

That is, since the request destination ID is ALL, the protector W puts its own ID in the request destination ID and returns data based on the request as follows.
Request signal + request number + request source ID + request destination ID + transit route + request details
An (Answer) 0001 AW HOV W data

  The reply data of the protector W is received by the protectors P, Q, R, V, and X existing in the same area. The protector V retransmits the deterioration information as it is because the request signal is An and its ID is in the passage route (steps S1, S2, S8, S10, S11, S12 in FIG. 10). The protectors P, Q, R, and X do nothing because the request signal is An and there is no ID in the passage route (steps S1, S2, S8, S10, and S13 in FIG. 10).

Since the request destination ID is ALL, the protector W puts its ID in the passage route and re-transmits as follows.
Request signal + request number + request source ID + request destination ID + transit route + request content
Re (Request) 0001 A ALL HOVW Data request

  The retransmitted data of the protector W is received by the protectors P, Q, R, V, and X existing in the same area. Since the protectors P, Q, and V are already processed request numbers, nothing is done (steps S1, S2, S3, and S4 in FIG. 10). Since the request destinations are ALL, the protectors R and X return their own degradation information (steps S1, S2, S3, S5, and S6 in FIG. 10), and then retransmit the ID by adding their ID to the passage route. (Steps S1, S2, S3, S5, S6, S14, S7 in FIG. 10).

  As shown in FIG. 11 (6), the protector X returns its own deterioration information (steps S1, S2, S3, S5, and S6 in FIG. 10), and further adds its own ID (X) to the progress information. Add and retransmit (steps S1, S2, S3, S5, S6, S14, S7 in FIG. 10).

That is, since the request destination ID is ALL, the protector X puts its own ID in the request destination ID and returns the data based on the request as follows.
Request signal + request number + request source ID + request destination ID + transit route + request details
An (Answer) 0001 AX HOVW X data

  The reply data of the protector X is received by the protectors Q, R, and W existing in the same area. The protector W re-transmits the data as it is because the request signal is An and its ID is in the passage route (steps S1, S2, S8, S10, S11, S12 in FIG. 10). The protectors Q and R do nothing because the request signal is An and there is no ID in the passage route (steps S1, S2, S8, S10, and S13 in FIG. 10).

Since the requester ID is ALL, the protector X puts its ID in the passage route and re-transmits as follows.
Request signal + request number + request source ID + request destination ID + transit route + request content
Re (Request) 0001 A ALL HOVWX Data request

  The retransmitted data of the protector X is received by the protectors Q, R, and W existing in the same area. Since the protectors Q, R, W are already processed request numbers, nothing is done (steps S1, S2, S3, S4 in FIG. 10).

(2) Operation when data is requested from the operation terminal A to the protector X FIGS. 12 (1) to (6) and FIGS. 13 (1) to (4) are shown in FIG. It is explanatory drawing in the case of requesting data.

First, in FIG. 12 (1), when the following data request signal is transmitted from the operation terminal A, the protectors B, G, and H existing in the same area as the operation terminal A receive.
Request signal + request number + request source ID + request destination ID + transit route + request content
Re (Request) 0002 AX data transmission request

  Since the protectors B, G, and H are not addressed to themselves, their own IDs are added to the passage route and retransmitted (steps S1, S2, S3, S5, and S7 in FIG. 10).

As shown in FIG. 12 (2), the protector H is not a request addressed to itself, and therefore retransmits with its own ID (H) added to the route as follows.
Request signal + request number + request source ID + request destination ID + transit route + request content
Re (Request) 0002 AXH data transmission request

  The retransmitted data of the protector H is received by the operation terminal A and the protectors B, C, G, I, M, N, and O existing in the same area. Since the operation terminal A and the protectors B and G are already processed request numbers, nothing is done (steps S1, S2, S3 and S4 in FIG. 10). Since the protectors C, I, M, N, and O are not addressed to themselves, they enter their IDs in the passage route and retransmit (steps S1, S2, S3, S5, and S7 in FIG. 10).

As shown in FIG. 12 (3), the protector O is not a request addressed to itself, and therefore retransmits with its own ID (O) added to the route as follows.
Request signal + request number + request source ID + request destination ID + transit route + request content
Re (Request) 0002 AX HO Data transmission request

  The retransmitted data of the protector O is received by the protectors H, I, J, N, P, T, U, and V existing in the same area. Since the protectors H, I and N are already processed request numbers, nothing is done (steps S1, S2, S3 and S4 in FIG. 10). Since protectors J, P, T, U, and V are not addressed to themselves, they put their IDs in the passage route and retransmit (steps S1, S2, S3, S5, and S7 in FIG. 10).

As shown in FIG. 12 (4), the protector V is not a request addressed to itself, and therefore retransmits with its own ID (V) added to the route as follows.
Request signal + request number + request source ID + request destination ID + transit route + request content
Re (Request) 0002 AX HOV Data transmission request

  The retransmitted data of the protector V is received by the protectors O, P, Q, U, and W existing in the same area. Since the protectors O, P, U are already processed request numbers, nothing is done (steps S1, S2, S3, S4 in FIG. 10). Since the protectors Q and W are not addressed to themselves, the protectors Q and W add their IDs to the passage route and retransmit (steps S1, S2, S3, S5 and S7 in FIG. 10).

As shown in FIG. 12 (5), the protector W is not a request addressed to itself, so adds its own ID (W) to the route and retransmits as follows.
Request signal + request number + request source ID + request destination ID + transit route + request content
Re (Request) 0002 AX HOVW Data transmission request

  The retransmitted data of the protector W is received by the protectors P, Q, R, V, and X existing in the same area. Since the protectors P, Q, and V are already processed request numbers, nothing is done (steps S1, S2, S3, and S4 in FIG. 10). Since the protector R is not addressed to itself, the protector R adds its own ID to the passage route and retransmits (steps S1, S2, S3, S5, and S7 in FIG. 10). Since the protector X is addressed to itself, data is returned based on the request contents (steps S1, S2, S3, S5 and S6 in FIG. 10).

Since the protector X is a request addressed to itself as shown in FIG. 12 (6), the data is replied with data (for example, 1234567890) as shown below.
Request signal + request number + request source ID + request destination ID + transit route + request content
An (Answer) 0002 AX HOVW 1234567890

  The reply data of the protector X is received by the protectors Q, R, and W existing in the same area. Since the request signal is An and there is W in the passage route, the protector W retransmits as it is (steps S1, S2, S8, S10, S11, S12 in FIG. 10). The protectors Q and R do nothing because the request signal is An and there is no ID in the passage route (steps S1, S2, S8, S10, and S13 in FIG. 10).

In the protector W, as shown in FIG. 13 (1), since the request signal is An and its own ID is in the passage route, it retransmits as it is as follows.
Request signal + request number + request source ID + request destination ID + transit route + request content
An (Answer) 0002 AX HOVW 1234567890

  The retransmitted data of the protector W is received by the protectors P, Q, R, V, and X existing in the same area. Since the protector X has already been processed, it does nothing (steps S1, S2, S8, S9 in FIG. 10). Since the request signal is An and its own ID is in the passage route, the protector V retransmits it as it is (steps S1, S2, S8, S10, S11, S12 in FIG. 10). The protectors P, Q, and R do nothing because the request signal is An and there is no ID in the passage route (steps S1, S2, S8, S10, and S13 in FIG. 10).

In the protector V, as shown in FIG. 13 (2), since the request signal is An and there is its own ID in the passage route, it retransmits as it is as follows.
Request signal + request number + request source ID + request destination ID + transit route + request content
An (Answer) 0002 AX HOVW 1234567890

  The retransmitted data of the protector V is received by the protectors O, P, Q, U, and W existing in the same area. Since the protector W has already processed the request number, nothing is done (steps S1, S2, S8, S9 in FIG. 10). Since the request signal is An and there is its own ID in the passage route, the protector O retransmits it as it is (steps S1, S2, S8, S10, S11, S12 in FIG. 10). The protectors U, P, and Q do nothing because the request signal is An and there is no ID in the passage route (steps S1, S2, S8, S10, and S13 in FIG. 10).

In the protector O, as shown in FIG. 13 (3), since the request signal is An and its own ID is in the passage route, it retransmits as it is as follows.
Request signal + request number + request source ID + request destination ID + transit route + request content
An (Answer) 0002 AX HOVW 1234567890

  The retransmitted data of the protector O is received by the protectors H, I, J, N, P, T, U, and V existing in the same area. Since the protector V has already been processed, it does nothing (steps S1, S2, S8, S9 in FIG. 10). Since the request signal is An and there is its own ID in the passage route, the protector H retransmits it as it is (steps S1, S2, S8, S10, S11, S12 in FIG. 10). The protectors I, J, N, P, T, and U do nothing because the request signal is An and there is no ID in the passage route (steps S1, S2, S8, S10, and S13 in FIG. 10).

In the protector H, as shown in FIG. 13 (4), since the request signal is An and its own ID is in the passage route, it retransmits as it is as follows.
Request signal + request number + request source ID + request destination ID + transit route + request content
An (Answer) 0002 AX HOVW 1234567890

  The retransmitted data of the protector H is received by the protectors O, P, Q, U, and W existing in the same area. Since the protector O is a request number already processed, nothing is done (steps S1, S2, S8, S9 in FIG. 10). The protectors B, C, G, I, M, and N do nothing because the request signal is An and there is no ID in the passage route (steps S1, S2, S8, S10, and S13 in FIG. 10). Since the request signal is An and the request source is A, the operation terminal A receives the deterioration information and ends. In this way, the deterioration information of the protector X is transmitted to the operation terminal A.

(3) Operation of data request from operation terminal 100 via relay terminal 120-1,... FIG. 14 shows a direct or relay terminal (for example, 120-1, 120-2, 120-3) from operation terminal 100. It is explanatory drawing when a data request | requirement is carried out with respect to protector A ...... X.

  For example, when data is requested from the operation terminal 100 to a plurality of protectors 1-1 to 1-24 (indicated by reference characters A to X in FIG. 14), the plurality of protectors A to X communicate with each other. Can be divided into a plurality of areas 200-1 to 200-3, and relay terminals 120-1 to 120-3 are installed in the respective areas 200-1 to 200-3.

  FIG. 15 is a flowchart showing a processing procedure for collecting deterioration information of the protector F in the area 200-1 in FIG.

  The operation is started, and the serial number (S / N) of the protector F is input to the screen of the operation terminal 100 to select the protector F, or the protectors A to X (or serial numbers) are displayed on the screen. A list is displayed and the protector F is selected therefrom (step S20). Then, the data request signal with which the protector F reacts is transmitted from the operation terminal 100 (step S21). The reachable range of the data request signal is the area 200-1, and the protector F existing in the area 200-1 responds, and the deterioration information is returned from the protector F to the operation terminal 100 (step S22). ). At this time, the other protectors A to E, G, H and the repeater 120-1 in the area 200-1 do not respond. The operating terminal 100 responds to the reply from the protector F, the deterioration information of the protector F is displayed on the display unit 102 of the operating terminal 100 (step S23), and the operation ends.

  FIG. 16 is a flowchart illustrating a processing procedure in the case of collecting deterioration information of the protector L in the area 200-2 in FIG.

  The operation is started, and the serial number (S / N) of the protector L is input to the screen of the operation terminal 100 to select the protector L, or the protectors A to X (or the serial number) are displayed on the screen. A list is displayed and the protector L is selected therefrom (step S30). Then, the data request signal which the protector L reacts is transmitted from the operating terminal 100 (step S31). Since the protector L does not exist in the area 200-1 of the reachable range of the data request signal, the operation terminal 100 does not respond (step S32).

  The operation terminal 100 transmits a radio signal for searching for the relay terminal 120-1 in the area 200-1 (step S33). Then, the relay terminal 120-1 reacts and returns a radio signal to the operation terminal 100 (step S34). The operation terminal 100 transmits an instruction signal to search for the protector L to the relay terminal 120-1 (step S35). The relay terminal 120-1 transmits a radio signal for searching for the protector L (step S36). Thereby, the protector L reacts and returns the deterioration information to the relay terminal 120-1 (step S37).

  The relay terminal 120-1 transmits the deterioration information of the protector L to the operation terminal 100 (step S38). The operation terminal 100 reacts to the reply from the relay terminal 120-1, the deterioration information of the protector L is displayed on the display unit 102 of the operation terminal 100 (step S39), and the operation is finished.

  FIG. 17 is a flowchart showing a processing procedure for collecting deterioration information of the protector R in the area 200-3 in FIG.

  The operation is started, and the serial number (S / N) of the protector R is input to the screen of the operation terminal 100 to select the protector R, or the protectors A to X (or serial numbers) are displayed on the screen. When the list is displayed and the protector R is selected from the list, a data request signal to which the protector R reacts is transmitted from the operation terminal 100 (step S40). Since the protector R does not exist in the area 200-1 of the reach range of the data request signal, the operation terminal 100 does not respond. The operation terminal 100 transmits a radio signal for searching for the relay terminal 120-1 in the area 200-1 (step S41).

  Since relay terminal 120-1 reacts and returns a radio signal to operation terminal 100, operation terminal 100 transmits an instruction signal to search for protector R to relay terminal 120-1 (step S42). The relay terminal 120-1 transmits a radio signal for searching for the protector R (step S43). Since the protector R does not exist in the area 200-2 of the relay terminal 120-1, the protector R does not react to the radio signal of the relay terminal 120-1 (step S44).

  Relay terminal 120-1 replies to operation terminal 100 that there is no protector R (step S45). The operation terminal 100 transmits a radio signal instructing the search for the relay terminal 120-2 in the area 200-2 to the relay terminal 120-1. The relay terminal 120-1 transmits a radio signal for searching for the relay terminal 120-2 (step S46). Thereby, the relay terminal 120-2 reacts and returns a radio signal to the relay terminal 120-1 (step S47). Relay terminal 120-1 replies to operation terminal 100 that relay terminal 120-2 is present (step S48).

  The operation terminal 100 transmits an instruction signal “to search for the protector R by the relay terminal 120-2” to the relay terminal 120-1 (step S49). Since relay terminal 120-1 transmits an instruction signal to search for protector R to relay terminal 120-2, a radio signal for relay terminal 120-2 to search for protector R in area 200-3. Is transmitted (step S50).

  Since the protector R responds and transmits the deterioration information to the relay terminal 120-2, the relay terminal 120-2 transmits the deterioration information to the relay terminal 120-1 (step S51). The relay terminal 120-1 transmits the deterioration information of the protector R to the operation terminal 100 (step S52). The operation terminal 100 reacts to the reply from the relay terminal 120-1, the deterioration information of the protector R is displayed on the display unit 102 of the operation terminal 100 (step S53), and the operation ends.

(Effect of Example 4)
(A) For example, in the protector deterioration detection system as shown in FIG. 7, it is possible to collect deterioration information from all the protectors 1-1, 1-2,... However, in such a system, as shown in FIGS. 8 and 9, when the protectors 1-4,... Therefore, in the fourth embodiment, ad hoc communication or the like from the operation terminal 100 held by the maintenance person (user) to the protectors 1-1, 1-2,... Having wireless communication functions disposed at a plurality of locations. Degradation information of all the protectors 1-1, 1-2,... Is collected by performing multi-hop communication. Therefore, since information arrives via the protectors 1-2,... On the way, the risk of omission of collection of deterioration information is greatly reduced.

  (B) Since the radio wave does not reach from the outside to the protectors 1-4,... Arranged in the metal casing 110 as shown in FIG. 8, the relay terminal 120 is arranged in the metal casing 110. By doing so, wireless communication becomes possible. Further, the present embodiment is not limited to the case inside the metal housing 110, and even in the case of 1: 1 normal wireless communication, even when wireless communication is not possible due to the apparatus 111 and the shielding object 111 such as a wall as shown in FIG. In the ad hoc communication or multi-hop communication such as 4, the probability of successful wireless communication is improved by the radio waves of the surrounding protectors 1-1,.

  (C) Even if some protectors 1-2,... Fail due to excessive lightning surge, etc., information can be collected via other protectors 1-5,. While having a simple configuration, the reliability of the system can be improved, and deterioration information from the protectors 1-1,... Can be collected efficiently.

  In addition, this invention is not limited to the said Examples 1-4, A various deformation | transformation is possible. Examples of this modification include the following (A) to (C).

  (A) The protector 1 of Examples 1 to 3 can be variously changed to configurations other than those illustrated. For example, in FIG. 6, each circuit of the jack 50, the plug 70, and the wireless control unit 90 is changed to a circuit configuration other than that illustrated, resistors 94 to 96 are provided on the plug 70 side, or the plug 70 and the wireless control unit are controlled. The portion 99 may be integrated so that it can be inserted into and removed from the jack 50.

  (B) In the fourth embodiment, the deterioration information is transmitted by ad hoc communication or multi-hop communication. However, the operation flow is also changed to a processing procedure other than illustrated, or if it is an efficient communication method, Changes can be made to various algorithms.

It is a schematic block diagram of the protector with a degradation state detection function which shows Example 1 of this invention. It is another circuit block diagram of the safety | security circuit and the deterioration detection circuit in the protector which shows Example 2 of this invention. It is a block diagram which shows the specific structural example of the protector which shows Example 3 of this invention. FIG. 4 is a separation view of FIG. FIG. 4 is a separation view of FIG. It is a block diagram which shows the specific structural example of the protector which shows Example 3 of this invention. It is a schematic block diagram which shows the structural example of the protector degradation detection system in Example 4 of this invention. It is a schematic block diagram which shows the structural example of the protector degradation detection system in Example 4 of this invention. It is a schematic block diagram which shows the structural example of the protector degradation detection system in Example 4 of this invention. It is a flowchart which shows the process of each protector in FIG. It is explanatory drawing in case data is requested | required with respect to all the protectors B ...... X from the operating terminal A. FIG. It is explanatory drawing in the case of requesting data from the operating terminal A to the protector X. It is explanatory drawing in the case of requesting data from the operating terminal A to the protector X. It is explanatory drawing in the case of making a data request | requirement with respect to protector A, ..., X from the operating terminal 100 directly or via a relay terminal. It is a flowchart which shows the process sequence in the case of collecting the deterioration information of the protector F in the area 200-1 in FIG. It is a flowchart which shows the process sequence in the case of collecting the deterioration information of the protector L in the area 200-2 in FIG. It is a flowchart which shows the process sequence in the case of collecting the deterioration information of the protector R in the area 200-3 in FIG.

Explanation of symbols

1, 1-1, 1-2,... Protective device 10, 10A Safety circuit 11 Arrester 12 Varistor 20, 20A Degradation detection circuit 30 Control circuit 40 Radio 100 Operation terminal 120, 120-1, 120-2, 120 -3 Relay terminal

Claims (5)

A jack connected to the track of the protected device;
A safety circuit that is detachably attached to the jack and discharges a lightning surge entering the line to the ground, and a deterioration detection circuit that detects a deterioration state of the safety circuit based on a control signal and outputs the deterioration information A plug having
A data request signal that is detachably attached to the plug and that is sent from outside by radio waves is received, and when the data request signal is addressed to itself, the control signal is provided to the deterioration detection circuit and is sent from the deterioration detection circuit. A wireless control unit for transmitting the output degradation information to the outside wirelessly and transferring the received data request signal to the outside wirelessly when the data request signal is not addressed to itself,
A protector characterized by comprising A jack connected to the track of the protected device;
A plug having a safety circuit that is detachably attached to the jack and discharges a lightning surge entering the line to the ground,
A deterioration detection circuit that is detachably attached to the plug, detects a deterioration state of the safety circuit based on a control signal, and outputs the deterioration information, and receives a data request signal sent from outside by radio waves, When the data request signal is addressed to itself, the control signal is supplied to the deterioration detection circuit to transmit the deterioration information output from the deterioration detection circuit to the outside by radio, and when the data request signal is not addressed to itself, A wireless unit that wirelessly transfers the received data request signal to the outside, and a wireless control unit,
A protector characterized by comprising The protector according to claim 1 or 2,
When collecting the deterioration information in the protector, an operation terminal that transmits the data request signal wirelessly and receives the deterioration information returned wirelessly in response to the data request signal;
A protector deterioration detection system characterized by comprising: The protector according to claim 1 or 2,
When collecting the deterioration information in the protector, an operation terminal that transmits the data request signal wirelessly and receives the deterioration information returned wirelessly in response thereto;
A relay terminal that receives the data request signal and the deterioration information sent by wireless and transfers them wirelessly;
A protector deterioration detection system characterized by comprising:   The protector deterioration detection system according to claim 3 or 4, wherein the wireless communication method is ad hoc communication or multi-hop communication.

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