JP5629222B2 - Protective device, protective device panel using the protective device, protective device monitoring unit and protective device monitoring system - Google Patents

Description

  The present invention relates to a surge protection device (hereinafter referred to as “SPD”) for protecting a protected device such as a power supply device from a surge current such as lightning induced in a power line, a communication line or the like. In particular, a protective device having an operation display device that displays an operation state of a protection circuit provided in the protective device, a protective device panel including a plurality of the protective devices, and the protective device panel. The present invention relates to a protector monitoring system that remotely monitors and monitors the operating state of the protector.

  A conventional protector has, for example, a protection circuit, a display for displaying a deterioration state of the protection circuit, and the like as described in Patent Documents 1 and 2 below. When a surge current such as lightning enters the protector from a line such as a power supply line, the surge current is discharged to the ground line side by the protection circuit, and protected equipment such as power supply equipment connected to the line is protected.

  The protection circuit includes, for example, protection elements such as arresters that are lightning arresters and varistors that are non-linear resistance elements. When the characteristics of the protective element deteriorate as the number of operations increases due to surge current, the protective element may generate heat and burn out. Therefore, a deterioration display unit for displaying the deterioration state of the protection element is provided in the protector.

  In the protector of patent document 1, the deterioration display part is comprised with the thermo label. The thermo label is affixed to the lightning protection element. Since the color of the thermolabel changes due to heat generated by the operation of the lightning arrester, the color change can be visually confirmed.

  In the protector of Patent Document 2, the deterioration display portion is formed of a colored member, and further, when the protection element is deteriorated, a separation portion for separating the protection element from the protection circuit is provided. When the separation part operates, the coloring member rotates and the color of the display member changes by a slide or swing mechanism, so that the color change can be visually confirmed from the display window. It is configured.

JP 2005-150657 A JP 2006-059888 A

  However, the conventional protectors described in Patent Documents 1 and 2 have the following problems (1) and (2).

(1) Problem of the protector of Patent Document 1 The thermo label constituting the deterioration display unit does not react to a small surge current because of the degree of heat generation. The color of the thermolabel does not return to its original state after the reaction and needs to be replaced. The number of surge current intrusions cannot be determined. Furthermore, the operation and deterioration states of a plurality of protectors cannot be monitored collectively.

(2) Problem of the protector of Patent Document 2 Since the number of parts constituting the deterioration display unit is large, the structure is complicated. Since many deterioration display components are accommodated in the protector, it is difficult to reduce the size of the protector. When trying to reduce the size of the protector, the display portion of the deterioration display portion becomes small, and visual inspection from the outside becomes difficult. Furthermore, the operation and deterioration states of a plurality of protectors cannot be monitored collectively.

  The protector of the first invention of the present invention is a case provided with a plurality of external terminals to be connected to a track, and is accommodated in the case, and is connected to the plurality of external terminals via conductors, A protection circuit that suppresses a surge current that enters the conductor, and a built-in inside of the case or externally attached to the outside of the case, detects the surge current that flows through the conductor, and displays the operating state of the protection circuit An operation display device.

The operation display device is disposed in the vicinity of the conducting wire, and has a detection unit that outputs an induced current induced by the surge current flowing through the conducting wire, and converts the induced current into a voltage to perform deformation processing. a waveform processing section for outputting a waveform, and a control unit for determining the surge current calculation results from the voltage value of the deformation process the waveform is controlled by the control unit, in a visually recognizable manner from the outside, and displays the surge current calculation results And a display unit . The detection coil is a core coil in which a winding is wound around an iron core, and is arranged in the vicinity of the conducting wire so that a winding direction of the winding is substantially perpendicular or substantially parallel to the conducting wire. . The waveform processing unit converts the induced current into a voltage to generate a detection voltage, and performs a process of extending the voltage waveform of the detection voltage with respect to a time axis to output the deformation processing waveform A time constant circuit. Furthermore, the control unit calculates the surge current calculation result by calculating the current value of the surge current from the voltage value of the deformation processing waveform based on the correlation data.

  A protector panel according to a second aspect of the present invention is a storage box in which one or a plurality of the protectors according to the first aspect of the present invention are stored, and is disposed in the storage box, and performs wired communication or wireless communication with the protector. And a center unit for storing the operation state and operation history of the protector.

  According to a third aspect of the present invention, there is provided a guard panel comprising: a housing box in which one or more of the guards of the first invention are housed; and a housing box that is disposed in the housing box and communicates with the guard device via a transmission line. And a center unit for storing the operation state and operation history of the protector. The transmission path is disposed in the device mounting rail for detachably mounting the protector and the center unit, and electrically connects the protector and the center unit. And a base for connection.

  The protector monitoring unit of the fourth invention is disposed in the vicinity of the one or more protectors of the first invention and the protector, performs wired communication or wireless communication with the protector, and And a center unit for storing the operation state and operation history of the device.

  The protector monitoring unit according to a fifth aspect of the present invention is disposed in the vicinity of the one or more protectors according to the first aspect of the present invention, and communicates with the protector via a transmission line. And a center unit for storing the operation state and operation history of the protector. The transmission path is disposed in the device mounting rail for detachably mounting the protector and the center unit, and electrically connects the protector and the center unit. And a base for connection.

  The protector monitoring system of the sixth invention communicates with the protector panel of the second or third invention installed at one or a plurality of locations, and remotely communicates with the protector panel. And a monitoring device for monitoring.

  A protector monitoring system according to a seventh aspect of the present invention is the protector monitoring unit according to the fourth or fifth aspect of the invention installed at one or a plurality of locations, communicating with the protector monitoring unit, and the protector monitoring unit. And a monitoring device for remotely monitoring.

According to the protector of the first invention, the following effects (1) to (3) are obtained.
(1) A detection coil is arranged in the vicinity of the conducting wire, the surge current flowing through the conducting wire is detected, the waveform waveform of the detected voltage is extended with respect to the time axis by the waveform processing unit, and then the surge current is produced by the control unit. Therefore, a surge current with a small impulse can be detected with high accuracy.

  (2) By detecting the surge current using the detection coil and storing the detection result in the control unit, the number of occurrences and the magnitude of the surge current can be grasped.

  (3) Since the number of parts constituting the operation display device is small, the structure is simple. Since a small number of parts constituting the operation display device are accommodated in the protector or are externally attached, it is easy to reduce the size of the protector. Since the operation state of the protector is displayed by the display unit, even if the protector is downsized, it is easy to see from the outside.

  According to the protector panel of the second invention and the protector monitoring unit of the fourth invention, the center unit communicates with the protector, and the operation state and operation history of the protector are stored in the center unit. Therefore, it becomes easy to monitor the operation and the deterioration state of the protector collectively. In particular, when the protector and the center unit are configured to perform wireless communication, the wiring in the protector panel or the protector monitoring unit can be simplified.

  According to the protector panel of the third invention and the protector monitoring unit of the fifth invention, there are substantially the same effects as the second and fourth inventions. Particularly, since the protector and the center unit are detachably attached to the equipment mounting rail provided with the base, it is possible to add a plug and play function. Thereby, the wiring in a protector board or a protector monitoring unit can be simplified.

  According to the protector monitoring system of the sixth and seventh inventions, since the monitor device is configured to remotely monitor the protector via the protector panel or the protector monitoring unit, the operating state of the protector And the operation history can be easily and accurately monitored remotely.

FIG. 1 is a schematic configuration diagram showing a protector in Embodiment 1 of the present invention. FIG. 2A is a circuit diagram showing a configuration example of the protection circuit 40 (= 40-1, 40-2, 40-3) in FIG. FIG. 2B is a circuit diagram showing a configuration example of the protection circuit 40 (= 40-1, 40-2, 40-3) in FIG. FIG. 2C is a circuit diagram showing a configuration example of the protection circuit 40 (= 40-1, 40-2, 40-3) in FIG. FIG. 3 is a schematic configuration diagram showing the motion display device 100 in FIG. FIG. 4 is a circuit diagram showing a configuration example of the operation display device 100 of FIG. FIG. 5 is a schematic configuration diagram showing the detection coil 111 in the detection unit 110 in FIG. FIG. 6 is a diagram showing a correlation value between the surge current flowing through the grounding conductor 35 in FIGS. 4 and 5 and the voltage value of the deformation processing waveform S125 output from the waveform processing unit 120. FIG. 7A is a schematic perspective view showing a structural example of the protector 1 in FIGS. 1, 2C and 3 of the first embodiment. FIG. 7B is a schematic perspective view when the protector of FIG. 7A is viewed obliquely from below. FIG. 7C is a schematic front view of the protector of FIG. 7A when viewed from the front. FIG. 7D is a perspective view of the device mounting rail in FIG. 7C. FIG. 8 is a flowchart showing processing after wake-up of the control unit 130 in FIG. FIG. 9A is a diagram showing a waveform of the detection voltage S122 in FIG. FIG. 9B is a diagram showing a waveform of the starting voltage S164 in FIG. FIG. 9C is a diagram showing a voltage change of the deformation processing waveform S125 in FIG. FIG. 10 is a diagram showing a display example of the display unit 140 in FIG. FIG. 11 is a flowchart showing a processing example of the control unit 130 when the confirmation button 136 in FIG. 4 is pressed. FIG. 12 is a diagram illustrating another processing example of the control unit 130 when the confirmation button 136 in FIG. 4 is pressed. FIG. 13A is a perspective view showing a modification of the detection coil 111 of FIG. FIG. 13B is a perspective view showing a modification of the detection coil 111 of FIG. The figure is a perspective view showing another modification of the detection coil 111 of FIG. FIG. 15A is a schematic perspective view showing a modification of the protector 1 in FIGS. 7A, 7B, and 7C of the first embodiment. FIG. 15B is a schematic perspective view when the protector of FIG. 15A is viewed obliquely from above. FIG. 15C is a schematic front view of the protector of FIG. 15A when viewed from the front. FIG. 15D is a perspective view of a DIN rail which is a device mounting rail in FIGS. 15B and 15C. FIG. 16A is a schematic configuration diagram illustrating an overview of a protector monitoring system according to Embodiment 2 of the present invention. FIG. 16B is a schematic configuration diagram showing the center unit in FIG. 16A. FIG. 16C is a schematic configuration diagram showing the monitoring device in FIG. 16A. FIG. 17 is a diagram showing a display example of the display unit 316 in the center unit 310 of FIG. 16B. 18 is a diagram showing a display example of the display unit 436 in the monitoring device 430 of FIG. 16C. FIG. 19 is a configuration diagram showing a modification of the center unit 310 of FIG. 16B. FIG. 20 is a schematic configuration diagram showing an outline of the protector monitoring system according to the third embodiment of the present invention. FIG. 21 is a schematic configuration diagram showing an outline of a protector monitoring system in Embodiment 4 of the present invention. FIG. 22A is a schematic perspective view showing an installation state of the four protectors in FIG. FIG. 22B is a schematic plan view of FIG. 22A. FIG. 23 is a flowchart showing processing of the plug and play function.

  Modes for carrying out the present invention will become apparent from the following description of the preferred embodiments when read in light of the accompanying drawings. However, the drawings are only for explanation and do not limit the scope of the present invention.

(Configuration example of protector of Example 1)
FIG. 1 is a schematic configuration diagram showing a protector in Embodiment 1 of the present invention.

  The protector 1 has a separate or integrated case 10 for housing equipment. In the case 10, as a plurality of external terminals, for example, two line side terminals 21 and 22 connected to a power line, a communication line, etc., and two connected to a protected apparatus side such as a power supply device and a communication apparatus Device side terminals 23 and 24, a ground terminal 25 connected to the ground GND, and the like are provided. Other external terminals (not shown) but not a battery built-in type, a power supply terminal for applying a DC power supply voltage VCC from the outside, a communication terminal for communicating with an external device, due to deterioration of internal components An exchange identification terminal or the like for outputting a protector exchange identification signal is provided as necessary.

  The case 10 includes a protection circuit 40 that suppresses surge current such as lightning that enters from the outside, and an operation display device 100 that displays an operation state of the protection circuit 40.

  The protection circuit 40 includes, for example, line-side terminals 41 and 42 connected to line-side terminals 21 and 22 that are external terminals via conductors 31 and 32, and conductors 33 to equipment-side terminals 23 and 24 that are external terminals. , 34, and device-side terminals 43, 44 connected to each other, and a ground terminal 45 connected to a ground terminal 25, which is an external terminal, via a grounding conductor 35. Between these terminals 41, 42, 43, 44, and 45, protective elements such as arresters, varistors, and semiconductor elements for suppressing surge currents entering from the outside are connected.

  The operation display device 100 detects, for example, a surge current flowing in the grounding conductor 35 and displays the operation state of the protection circuit 40. The operation display device 100 includes a detection unit 110, a waveform processing unit 120, a control unit 130, and a display unit 140. Etc.

  The detection unit 110 includes a detection coil, and the detection coil is disposed in the vicinity (that is, nearest) of the grounding conductor 35 and outputs an induced current induced by a surge current flowing through the grounding conductor 35. The waveform processing unit 120 is connected to the output side. The waveform processing unit 120 converts the input induced current into a voltage to generate a detection voltage, and further performs a process of extending the voltage waveform of the detection voltage with respect to the time axis to output an analog deformation processing waveform S125. The control unit 130 is connected to the output side.

  The control unit 130 receives an analog deformation processing waveform S125, converts the deformation processing waveform S125 into a digital signal, calculates a current value of a surge current from the voltage value of the digital signal, and obtains a surge current calculation result. It has a function, a control function, etc., and is configured by a microcontroller (for example, Peripheral Interface Controller, hereinafter referred to as “PIC”). The PIC is used for controlling the connection of peripheral devices of a computer, and includes a central processing unit (hereinafter referred to as “CPU”) having an arithmetic function and a control function, and a random access memory (hereinafter referred to as “RAM”). ), A read only memory (hereinafter referred to as “ROM”), an input / output (hereinafter referred to as “I / O”) port, and the like are accommodated in one chip, and the program written in the ROM It is controlled by. A display unit 140 is connected to the output side of the control unit 130.

  The display unit 140 is, for example, disposed on the side wall in the case 10 and is controlled by the control function of the control unit 130 to display the surge current calculation result in a state visible from the outside. A light emitting diode as a light emitting element for lighting and displaying the current calculation result, hereinafter referred to as “LED”. ). The operation display device 100 may be externally attached outside the case 10.

  2A, 2B, and 2C are circuit diagrams illustrating configuration examples of the protection circuit 40 (= 40-1, 40-2, and 40-3) in FIG.

  The protection circuit 40-1 shown in FIG. 2A has four diodes 51, 52, 53, 54 that determine the direction in which the surge current flows, and two arresters 55, 56. Between one line side terminal 41 and the other line side terminal 42, a forward direction diode 51 and a reverse direction diode 52 are connected in series by a conducting wire. Between one device side terminal 43 and the other device side terminal 44, a diode 53 in the reverse direction and a diode 54 in the forward direction are connected in series by a conducting wire. Arrestors 55 and 56 are connected in series by a conducting wire between the connection point of the diodes 51 and 52 and the connection point of the diodes 53 and 54. The connection point of the arresters 55 and 56 is connected to the ground terminal 45 by the grounding conductor 35.

  For example, when a positive surge voltage is applied between the line-side terminal 41 and the line-side terminal 42 and the ground, the arrester 55 is discharged, and the lightning surge current flowing from the line-side terminal 41 is converted to the diode 51. The lightning surge current flowing from the line side terminal 42 is discharged to the ground terminal 45 via the diode 52 and the arrester 55. When a negative surge voltage is applied between the line side terminal 41 and the line side terminal 42 and the ground, the arrester 56 is discharged, and the lightning surge current flowing in from the ground terminal 45 becomes the arrester 56 and the diode 53. Is discharged to the line side terminal 41, and is discharged to the line side terminal 42 via the arrester 56 and the diode 54. In this way, the protected device connected to the device side terminals 43 and 44 is protected.

  When a surge voltage is applied between the lines and a surge current is input to the line side terminal 41, the arresters 55 and 56 are discharged, and the surge current passes through the diode 51, the arresters 55 and 56, and the diode 54. As a result, the protected device connected to the device side terminals 43 and 44 is protected. When a surge voltage is applied between the lines and a surge current is input to the line side terminal 42, the arresters 55 and 56 are discharged, and the surge current passes through the diode 52, the arresters 55 and 56, and the diode 53. The protected device connected to the device side terminals 43 and 44 flows to the line side terminal 41 and is protected.

  When detecting the surge current between the ground and the ground, the detection unit 110 is disposed in the immediate vicinity of the grounding conductor 35 connected to the ground terminal 45 as indicated by a triangle (Δ) in FIG. 2A. On the other hand, when detecting a surge current between lines, the detection unit 110 is arranged at a desired position. The desired position is, for example, the position of the conductive wire between the connection point of the diodes 51 and 52 and the arrester 55, or the connection between the arrester 56 and the diodes 53 and 54, as indicated by diamonds (形) in FIG. This is the position of the conductor between the points.

  The protection circuit 40-2 illustrated in FIG. 2B includes one arrester 61, two resistors 62 and 63, and one Zener diode 64. Between one line side terminal 41 and the other line side terminal 42, an arrester 61 is connected by a conductive wire, and a ground electrode of the arrester 61 is connected to a ground terminal 45 by a grounding conductive wire 35. A Zener diode 64 is connected by a conducting wire between one device side terminal 43 and the other device side terminal 44. A resistor 62 is connected between one line side terminal 41 and the equipment side terminal 43 by a conducting wire. A resistor 63 is also connected between the other line side terminal 42 and the equipment side terminal 44 by a conductive wire.

  The Zener diode 64 is for suppressing the line voltage generated when there is an unbalance between the line and the device. The resistors 62 and 63 suppress the current flowing through the Zener diode 64. If the resistance values of the resistors 62 and 63 are increased, the Zener diode 64 is not easily destroyed even with a long-term surge voltage, but the loss with respect to the transmission signal is increased.

  For example, when a surge voltage such as lightning is applied between the ground and the surge current is input to the line side terminal 41, the arrester 61 is discharged, and the surge current is discharged to the ground terminal 45 via the arrester 61. Thus, the protected device connected to the device side terminals 43 and 44 is protected. When a surge current is input to the line-side terminal 42, the arrester 61 is discharged, and the surge current is discharged to the ground terminal 45 via the arrester 61 and is connected to the device-side terminals 43 and 44. Is protected.

  Further, when a surge voltage is applied between the lines and a surge current is input to the line side terminal 41, the arrester 61 is discharged, and the surge current flows to the line side terminal 42 via the arrester 61, and the device side The protected device connected to the terminals 43 and 44 is protected. When a surge current is input to the line side terminal 42, the arrester 61 is discharged, the surge current flows to the line side terminal 41 via the arrester 61, and the protected device connected to the device side terminals 43 and 44. Is protected.

  When detecting a surge current between the ground and the ground, the detection unit 110 is disposed in the immediate vicinity of the grounding conductor 35 connected to the ground terminal 45 as indicated by a triangle (Δ) in FIG. 2B. On the other hand, when detecting a surge current between lines, the detection unit 110 is arranged at a desired position. The desired position is, for example, the position of the conductive wire between the line-side terminal 41 and the arrester 61, or the conductive wire between the line-side terminal 42 and the arrester 61, as indicated by a rhombus (◇) in FIG. 2B. Is the position.

  The protection circuit 40-3 illustrated in FIG. 2C includes two varistors 71 and 72 and one arrester 73. Between one line side terminal 41 and the other line side terminal 42, a varistor 71, an arrester 73, and a varistor 72 are connected in series by a conductive wire, and a ground electrode of the arrester 73 is connected to a ground terminal 45 by a grounding conductive wire 35. It is connected to the.

  For example, when a surge voltage such as lightning is applied between the ground and the surge current is input to the line side terminal 41, the arrester 73 is discharged, and the surge current passes through the varistor 71 and the arrester 73 to the ground terminal. The device to be protected discharged to 45 and connected to the device side terminals 43 and 44 is protected. When the surge current is input to the line side terminal 42, the arrester 73 is discharged, and the surge current is discharged to the ground terminal 45 via the varistor 72 and the arrester 73 and connected to the equipment side terminals 43 and 44. Protected equipment is protected.

  When a surge voltage is applied between the lines and a surge current is input to the line side terminal 41, the arrester 73 is discharged, and the surge current passes through the varistor 71, the arrester 73, and the varistor 72 to the line side terminal. The protected device connected to the device side terminals 43 and 44 is protected. When the surge current is input to the line side terminal 42, the arrester 73 is discharged, and the surge current flows to the line side terminal 41 via the varistor 72, the arrester 73, and the varistor 71, and then to the device side terminals 43 and 44. The connected protected equipment is protected.

  The reason why the arrester 73 and the varistors 71 and 72 are used in combination as protective elements is as follows.

  For example, when only the arrester 73 is used as the power line, after the arrester 73 is discharged by an impulse surge current, a continuation phenomenon occurs in which the discharge continues due to the alternating current even after the impulse current disappears. It may be shortened or burnt out. The arrester 73 and the varistors 71 and 72 are combined in series in order to interrupt such a continuous flow. In addition, when only the varistors 71 and 72 are used for the power supply line, if the characteristics deteriorate as the number of operations increases due to the impulse current, the leakage current increases, and eventually it may be burned out. The arrester 73 is connected in series with the varistors 71 and 72 in order to cut off the leakage current.

  When detecting a surge current between the ground and the ground, the detection unit 110 is disposed in the immediate vicinity of the grounding conductor 35 connected to the ground terminal 45 as indicated by a triangle (Δ) in FIG. 2C. On the other hand, when detecting a surge current between lines, the detection unit 110 is arranged at a desired position. The desired position is, for example, the position of the conductive wire between the varistor 71 and the arrester 73, or the position of the conductive wire between the varistor 72 and the arrester 73, as shown by a diamond (形) in FIG. 2C. .

  Note that the varistors 71 and 72 in the protection circuit 40-3 may be heated and burnt if they are deteriorated by an excessive surge current or the like. Therefore, in order to separate the varistors 71 and 72 from the circuit and prevent smoke and ignition, a separation unit (not shown) and a sensor 138 for detecting that the separation unit has been operated may be provided in the protection circuit 40-3. is there.

FIG. 3 is a schematic configuration diagram showing the motion display device 100 in FIG.
The detection unit 110 of the operation display device 100 includes a detection coil 111, and the detection coil 111 is disposed in the immediate vicinity of the grounding conductor 35 provided in the case 10 of the protector 1. In addition to the detection unit 110, the waveform processing unit 120, the control unit 130, and the display unit 140, the operation display device 100 includes a power supply terminal 101 to which the power supply voltage VCC is applied, a ground terminal 102 connected to the ground GND, and an internal A replacement identification terminal 103 is provided for outputting identification information for replacement of the protector due to component deterioration. Further, a confirmation button 136 and a communication unit 137 are provided, and these are connected to the control unit 130. When the sensor 138 in FIG. 2C for detecting the separation state of the protection element is provided, the sensor 138 is connected to the control unit 130, for example.

  The confirmation button 136 is a switch that protrudes on, for example, the upper surface of the case 10 of the protector 1 and is pressed to confirm the operation state of the protection circuit 40 from the outside. The communication unit 137 is controlled by the control unit 130, has a modulation and demodulation function for transmitting / receiving data to / from an external device, etc., and uses a power line as a communication line (Power Line Communication) In the case of performing “PLC”), the power supply terminal 101 is connected.

  The control unit 130 includes a CPU 131 having an arithmetic function and a control function, a memory 132 such as a ROM and a RAM that are accessed by the CPU 131, an input port 133, an I / O port 134, an output port 135, and the like that are controlled by the CPU 131. ,have. The input port 133 performs analog / digital conversion (hereinafter referred to as “A / D conversion”) in which an analog deformation processing waveform S125 output from the waveform processing unit 120 is input and converted into a digital signal, and a confirmation button 136 is also input. And the output signal of the sensor 138 are input.

  The I / O port 134 has a function of outputting an output signal of the sensor 138 to the exchange identification terminal 103 via the CPU 131 and delivering data to the communication unit 137. The output port 135 has a digital / analog conversion (hereinafter referred to as “D / A conversion”) function that converts a surge current calculation result of a digital signal output from the CPU 131 into an analog signal and supplies the analog signal to the display unit 140. . The display unit 140 includes, for example, two LEDs 141 and 142 for lighting and displaying the surge current calculation result converted into the analog signal.

FIG. 4 is a circuit diagram showing a configuration example of the operation display device 100 of FIG.
In the operation display device 100, the waveform processing unit 120 is connected to the output side of the detection unit 110 having the detection coil 111 via the overvoltage suppression circuit 150. The overvoltage suppression circuit 150 is a circuit that suppresses the maximum voltage value between the two output terminals of the detection coil 111 to a certain value or less (for example, 30 V or less), and includes two Zener diodes 151 and 152. The two Zener diodes 151 and 152 are connected in series in the opposite direction between the two output terminals of the detection coil 111.

The waveform processing unit 120 includes a full-wave rectifier circuit 121 connected to the output side of the overvoltage suppression circuit 150 and a current / voltage (hereinafter referred to as “I / V”) connected to the output side of the full-wave rectifier circuit 121. The resistor 122, a rectifying diode 123, a time constant circuit 124, and a resistor 125 are used as a conversion unit .

  The full-wave rectifier circuit 121 is a circuit that converts an induced current induced in the detection coil 111 into a direct current, and includes four diodes 121a, 121b, 121c, and 121d. A resistor 122 for I / V conversion is connected between the two output terminals of the full-wave rectifier circuit 121. The resistor 122 for I / V conversion converts the output current of the full-wave rectifier circuit 121 into a voltage to generate a detection voltage S122, and a time constant is provided on the output side via a rectifier diode 123. A circuit 124 is connected.

  The time constant circuit 124 is a circuit that extends the voltage waveform of the detection voltage S122 generated by the resistor 122 with respect to the time axis and outputs an analog deformation processing waveform S125. The time constant circuit 124 includes a resistor 124a having a large time constant and It is configured by a series circuit of a capacitor 124b. A resistor 125 is connected between the two electrodes of the capacitor 124b. A connection point between the capacitor 124b and the resistor 125 is connected to the power supply terminal 101 to which the power supply voltage VCC is applied via a forward diode 126. A connection point between the capacitor 124 b and the resistor 125 is further connected to an input port 133 in the control unit 130.

  A voltage limiting voltage circuit 160 is connected to a connection point between the cathode of the diode 121a and the anode of the diode 123 in the full-wave rectifier circuit 121 through a resistor 127 that steps down the detection voltage S122. The voltage limiting circuit 160 is a circuit that limits the voltage stepped down by the resistor 127 to a certain voltage value or less, and the LED 161 connected in the forward direction between the resistor 127 and the ground terminal 102 connected to the ground GND. The diode 161 is connected in parallel to the LED 161 in the reverse direction. At the connection point between the anode of the LED 161 and the cathode of the diode 16, the maximum voltage value Vmax is limited to, for example, 2.0 V or less by the threshold voltage Vf of the LED 161. The anode of the diode 164 and the input port 133 in the control unit 130 are connected to a connection point between the anode of the LED 161 and the cathode of the diode 162 via a resistor 163. The cathode of the diode 164 is connected to the power supply terminal 101 on the power supply voltage VCC side. The anode voltage of the diode 164 is applied to the input port 133 in the control unit 130 as the starting voltage S164.

In the control unit 130, the confirmation button 136 connected to the input port 133 is a normally-off type switch connected between the input port 133 and the power supply terminal 101 on the power supply voltage VCC side. The electrode on the input port 133 side of the confirmation button 136 is connected to the ground terminal 102 on the ground GND side via a resistor 145. The control unit 130 includes a ground terminal VSS, a power supply terminal VDD, and the like. The ground terminal VSS is connected to the ground terminal 102 on the ground GND side, and the power supply terminal VDD is connected to the power supply terminal 101 on the power supply voltage VCC side. ing. The power supply terminal 101 is further connected to the ground terminal 102 on the ground GND side via a capacitor 146 for preventing noise.

  One end of two resistors 143 and 144 is connected to the output port 135 in the control unit 130, and the other end of each of the resistors 143 and 144 is connected to the anode of each LED 141 and 142 in the display unit 140. Yes. The cathodes of the LEDs 141 and 142 are connected to the ground terminal 102 on the ground GND side.

FIG. 5 is a schematic configuration diagram showing the detection coil 111 in the detection unit 110 in FIG.
The detection coil 111 is a core coil in which a winding 111b is wound around an iron core 111a. The detection coil 111 is disposed in the immediate vicinity of the grounding conductor 35 so that the winding direction of the winding 111b is substantially perpendicular to the grounding conductor 35.

The specification of the detection coil 111 is set as follows, for example.
・ Length of detection coil 111: 10 mm
・ Length of iron core 111a; 20mm
-Diameter of the iron core 111a; 1mm
-Number of turns of winding 111b (number of turns);
When the surge current to be detected is 100 A to 1 kA; 120 turns When the surge current to be detected is 1 kA to 10 kA; 30 turns

The installation position of the detection coil 111 is set as follows, for example.
・ Distance from grounding conductor 35; 5 mm or less
Installed perpendicular to the grounding conductor 35

  FIG. 6 is a diagram showing a correlation value between the surge current flowing in the grounding conductor 35 in FIGS. 4 and 5 and the voltage value of the deformation processing waveform S125 output from the waveform processing unit 120.

  In FIG. 6, for example, the correlation value when the winding 111b in the detection coil 111 is measured as 120 turns is shown. This correlation value is stored in advance in the memory 132 in the control unit 130 in FIGS.

(Structure example of the protector of Example 1)
FIG. 7A is a schematic perspective view illustrating a structural example of the protector 1 in FIGS. 1, 2C, and 3 of the first embodiment. FIG. 7B is a schematic perspective view when the protector of FIG. 7A is viewed obliquely from below. FIG. 7C is a schematic front view of the protector of FIG. 7A when viewed from the front. 7D is a perspective view of the device mounting rail in FIG. 7C.

  7A, 7B, and 7C, only the main part of the protector 1 is schematically illustrated. As shown in FIG. 2C, the detector 110 of the protector 1 is disposed in the immediate vicinity of the grounding conductor 35 between the arrester 73 and the grounding terminal 45 in order to detect a surge current between ground. .

  The protector 1 shown in FIGS. 7A, 7B, and 7C includes a jack board 2 and an SPD plug 3, and the case 10 of the protector 1 includes a jack case 10-1 on the jack board 2 side and an SPD plug. It is divided into a three-side plug case 10-2. The SPD plug 3 has a structure that can be inserted into and removed from the jack board 2 as indicated by an arrow in FIG. 7A.

  The jack case 10-1 on the jack board 2 side includes a substantially box-shaped base part 11 and a pair of side wall parts 12-1 and 12-2 extending upward from both side surfaces of the base part 11. It is comprised by. A plug housing portion 13 for housing the SPD plug 3 so as to be insertable and detachable is formed by a region surrounded by the base portion 11 and the side wall portions 12-1 and 12-2. A fixed claw 15 and a moving claw 16 as a rail stopper are provided on the bottom surface of the base portion 11 so as to face each other at a predetermined distance. The moving claw 16 is biased toward the fixed claw 15 by a spring (not shown). With these fixed claws 15 and moving claws 16, mounting rails for devices (for example, DIN rails) 50 shown in FIG. 7D are sandwiched, and the jack panel 2 can be detached from the DIN rails 50. It has a fixed structure.

  The DIN rail 50 is a device mounting bracket having a width of 35 mm, for example, defined by the DIN standard. The DIN standard stipulates equipment mounting rails for mounting electrical equipment such as switches and industrial terminal blocks used at AC 1000 V or less or DC 1500 V or less. An insulating base 51 is disposed in the DIN rail 50. On the base 51, a plurality of power terminals 52 each including a pair of concave positive power terminal 52a and negative power terminal 52b are provided at a predetermined interval. Each power supply terminal 52 is electrically connected by a conductive pattern (not shown) formed on the base 51.

  On the bottom surface of the base portion 11 of the jack board 2, a power terminal 101 including a pair of convex positive power terminal 101 a and negative power terminal 101 b is attached between the fixed claw 15 and the movable claw 16. Yes. The power terminal 101 on the jack board 2 side is detachably inserted into the power terminal 52 on the DIN rail 50 side.

  One electric wire introduction hole 13-1 is provided in the outer surface of one side wall part 12-1. One terminal opening 14-1 is formed on the upper surface of the side wall 12-1. A screw-shaped line side terminal 21 is attached in the terminal opening 14-1. A terminal portion of the line (not shown) inserted into the electric wire introduction hole 13-1 is fixed by the line side terminal 21.

  Similarly, one electric wire introduction hole (not shown) is provided on the outer surface of the other side wall 12-2. One terminal opening 14-2 is formed on the upper surface of the side wall 12-2. A screw-shaped ground terminal 25 is attached in the terminal opening 14-2. A terminal portion of a line (not shown) inserted into the electric wire introduction hole on the side wall portion 12-2 is fixed by a ground terminal 25.

  An exchange identification terminal 103 is detachably inserted at a position below the electric wire introduction hole 13-1 on the outer surface of one side wall 12-1.

  The plug case 10-2 on the SPD plug 3 side has a substantially rectangular parallelepiped shape, and the protection circuit 40 and the operation display device 100 are provided therein. The display unit 140 of the operation display device 100 is disposed in the upper part of the plug case 10-2, and two LEDs 141 and 142 constituting the display unit 140 are attached in a state that is visible from the outside. A confirmation button 136 protrudes from the upper surface of the plug case 10-2.

(Operation of Example 1)
For example, in the protector 1 shown in FIGS. 1 and 7A, an operation when a surge voltage is generated between the line-side terminal 21 and the ground terminal 25 due to a lightning strike or the like will be described.

  When a surge voltage is generated between the line side terminal 21 and the ground terminal 25 of the protector 1 shown in FIG. 1, the arrester 73 between the line side terminal 41 and the ground terminal 45 of the protection circuit 40 shown in FIG. Then, the surge current is discharged from the line side terminal 41 to the ground terminal 45 via the varistor 71, the arrester 73 and the grounding conductor 35. Thereby, the to-be-protected apparatus connected to the apparatus side terminals 23 and 24 of the protector 1 is protected.

  When a surge current flows through the grounding conductor 35, an induced current is induced in the detection coil 111 of the detection unit 110 arranged in the immediate vicinity of the grounding conductor 35 in the operation display device 100 shown in FIG. 4. The induced current induced in the detection coil 111 is full-wave rectified by the full-wave rectifier circuit 121 in the waveform processing unit 120 via the overvoltage suppression circuit 150.

  The full-wave rectified induced current is converted into a voltage by the resistor 122 to generate a detection voltage S122. The generated voltage waveform of the detection voltage S122 is extended with respect to the time axis in the time constant circuit 124 via the diode 123 to generate a deformation processing waveform S125, and passes through the connection point of the resistor 125 and the diode 126. Then, it is sent to the input port 133 in the control unit 130.

  On the other hand, the full-wave rectified induced current has its maximum voltage value limited to a certain value or less by the voltage limiting circuit 160 via the resistor 127, and the starting voltage S 164 is generated by the resistor 163 and the diode 164. The generated startup voltage S164 is sent to the input port 133 in the control unit 130, and the CPU 131 in the sleep state starts up (wakes up). The CPU 131 is always in a sleep state in order to reduce power consumption, and wakes up by the input of the activation voltage S164.

FIG. 8 is a flowchart showing processing after wake-up of the control unit 130 in FIG.
When the CPU 131 in the control unit 130 wakes up from the sleep state, the following processing in steps ST1 to ST10 is performed in the control unit 130.

  In step ST <b> 1, the deformation processing waveform S <b> 125 is input to the input port 133 in the control unit 130. In step ST <b> 2, the input port 133 converts the input deformation processing waveform S <b> 125 into a digital signal under the control of the CPU 131 and sends the digital signal to the CPU 131. In step ST3, the CPU 131 refers to the correlation value of FIG. 6 stored in the memory 132, calculates the current value of the surge current from the voltage value of the deformation processing waveform S125 converted into a digital signal, and obtains the surge current calculation result. Then, it is determined whether or not the surge current calculation result is equal to or greater than a certain value (for example, 100 A). If the result is smaller than the certain value (NO), the process proceeds to step ST10, enters the sleep state, and ends the process. .

  In step ST3, when it is above a certain value (YES), the process proceeds to step ST4. In step ST4, the CPU 131 increments the count value (count number) by +1, stores it in the memory 132, and proceeds to step ST6. In step ST6, the CPU 131 determines whether or not the calculated surge current calculation result is the maximum current so far. If the determination result is not the maximum current (NO), the process proceeds to step ST9, where the determination result is the maximum current. In the case of (YES), the process proceeds to step ST7.

  In step ST7, the CPU 131 sets the maximum current value, proceeds to step ST8, stores it in the memory 132, and proceeds to step ST9. In step ST9, the CPU 131 displays on the LEDs 141 and 142 of the display unit 140 via the output port 135 and the resistors 143 and 144 based on the surge current calculation result stored in the memory 132, and then proceeds to step ST10. The process enters the sleep state and ends.

9A, FIG. 9B, and FIG. 9C are diagrams showing signal waveforms at various parts in FIG.
FIG. 9A is a diagram illustrating a waveform example of the detection voltage S122 when a surge current flows through the grounding conductor 35 in FIG. The horizontal axis of FIG. 9A is time T (10 μS / 1 scale), and the vertical axis is voltage V (1 V / 1 scale).

  The waveform of the detection voltage S122 is, for example, an 8/20 μS waveform. When an impulsive surge current flows through the grounding conductor 35, the detection voltage S122 rises rapidly, reaches a maximum voltage value of 5 V after a time of 8 μS, and then drops. The detection voltage S122 decreases to 50% (= 2.5V) of the maximum voltage value of 5V after 20 μS from the rising edge.

  FIG. 9B is a diagram illustrating a waveform example of the starting voltage S164 in FIG. The horizontal axis in FIG. 9B is time T (10 μS / 1 scale), and the vertical axis is voltage V (500 mV / 1 scale).

  In the waveform of the starting voltage S164, the maximum voltage value Vmax is limited to 2.0V or less by the threshold voltage Vf of the LED 161. When a surge current flows through the grounding conductor 35, the starting voltage S164 output from the voltage limiting circuit 160 via the resistor 163 rises to the maximum voltage value Vmax (for example, 2.0 V or less), and the CPU 131 in the sleep state wakes up. Up.

  FIG. 9C is a diagram showing a voltage change of the deformation processing waveform S125 in FIG. The horizontal axis in FIG. 9C is time T (10 μS / 1 scale), and the vertical axis is voltage V (200 mV / 1 scale).

  The deformation processing waveform S125 rises with the rise of the detection voltage S122, and reaches the maximum voltage value of 800 mV until the time 10 μS. After that, it falls and decreases to a minimum voltage value of 300 mV or less around the time 20 μS to 30 μS. It rises again and reaches a voltage value of about 700 mV around time 47 μS. It decreases again, and the voltage value reaches 600 mV around time 55 μS. Thereafter, the deformation processing waveform S125 enters a stable region where the voltage value of 600 mV is maintained. Therefore, the CPU 131 reads the voltage value 600 mV of the deformation processing waveform S125 as a digital signal at the input port 133 with the reading point P when the deformation processing waveform S125 is in the stable region after 100 μS of time, and reads the memory 132. 6 (starting voltage 2.0 V, voltage value 650 mV of deformation processing waveform S125, surge current 400 A) stored in FIG. 6 and using the proportional expression, the voltage value of deformation processing waveform S125 is 600 mV. The current value of the surge current (= 600 mV × 400 A / 650 mV≈369.23) is calculated to obtain the surge current calculation result.

  As described above, the CPU 131 in the control unit 130 is normally kept in a sleep state in order to reduce power consumption. On the other hand, the generation time of an impulsive surge current waveform is extremely short. Therefore, the waveform processing unit 120 extends the wave tail of the detection voltage S122 waveform with respect to the surge current waveform to generate the deformation processing waveform S125. Thereby, even if the CPU 131 reads the deformation processing waveform S125 slowly after wake-up, the CPU 131 can accurately calculate the magnitude of the surge current.

FIG. 10 is a diagram showing a display example of the display unit 140 in FIG.
For example, when the surge current is 0 A or more and less than 100 A, the LEDs 141 and 142 in the display unit 140 are both kept off. When the surge current is 100 A or more and less than 300 A, only one LED 141 is lit for a moment. When the surge current is 300 A or more and less than 700 A, only the other LED 142 is lit for a moment. When the surge current is 700 A or more and less than 1000 A, both the LEDs 141 and 142 are lit for a moment. From the on / off state of the LEDs 141 and 142, the magnitude of the generated surge current can be visually recognized from the outside.

  The reason why the LEDs 141 and 142 are lit for a moment is to reduce power consumption when, for example, a battery built in the protector 1 is used as the power source of the protector 1.

  In order to confirm the operation history of the surge current, the confirmation button 136 in FIG. 4 is pressed. When the confirmation button 136 is pressed, the CPU 131 operates the LEDs 141 and 142 of the display unit 140 based on the surge current operation history stored in the memory 132. Thereby, the operation history of the surge current can be confirmed from the outside.

  FIG. 11 is a flowchart illustrating a processing example of the control unit 130 when the confirmation button 136 in FIG. 4 is pressed.

For example, when the number of detected surge currents in the past is as follows, the number of detections is stored in the memory 132.
(Small) Number of detected surge currents from 100 (A) to less than 300 (A): 3 times (Medium) Number of detected surge currents from 300 (A) to less than 700 (A): 5 times (Large) 700 (A) The number of times of detecting a surge current of not less than 1000 and less than 1000 (A); 1 time (the total number of detected large, medium and small) surge currents: 9 times

  When the confirmation button 136 is pressed, the following processing in steps ST20 to ST27 is performed in the control unit 130.

  When the confirmation button 136 is pressed in step ST20, this ON signal is sent to the CPU 131 via the input port 133, and the process proceeds to step ST21. In step ST21, the CPU 131 determines whether or not the confirmation button 136 is pressed once based on the sent ON signal. If the confirmation button 136 is pressed once (YES), the process proceeds to step ST22 and is pressed once. If not (NO), the process proceeds to step ST23. In step ST <b> 22, the CPU 131 causes the display unit 140 to display the maximum surge current value (700 (A) or more to less than 1000 (A)) stored in the memory 132. In this case, for example, the two LEDs 141 and 142 blink simultaneously once.

  In step ST23, the CPU 131 determines whether or not the confirmation button 136 is pressed twice. When the confirmation button 136 is pressed twice, the CPU 131 proceeds to step ST24. When the confirmation button 136 is not pressed twice, the CPU 131 proceeds to step ST23. Proceed to ST25. In step ST <b> 24, the CPU 131 displays the total number of surge current detections stored in the memory 132 on the display unit 140. In this case, for example, the LED 142 blinks nine times. If the total number of surge current detections is 21, the LED 141 blinks twice and then the LED 142 blinks once.

  In step ST25, the CPU 131 determines whether or not the confirmation button 136 is long-pressed. If long press (YES), the process proceeds to step ST26, and if not long press (NO), the process proceeds to step ST27. In step ST26, the CPU 131 erases (resets) the data stored in the memory 132. In step ST27, the CPU 131 enters a sleep state and ends the process.

  FIG. 12 is a diagram illustrating another processing example of the control unit 130 when the confirmation button 136 in FIG. 4 is pressed.

Similarly to the above, for example, when the number of detections of the surge current generated in the past is as follows, the number of detections is stored in the memory 132.
(Small) Number of detected surge currents from 100 (A) to less than 300 (A): 3 times (Medium) Number of detected surge currents from 300 (A) to less than 700 (A): 5 times (Large) 700 (A) No more than 1000 to less than 1000 (A) detection of surge current; Once

  When the confirmation button 136 is pressed, the CPU 131 reads the data stored in the memory 132 and causes the LEDs 141 and 142 of the display unit 140 to blink as follows.

  LED 141 blinks 3 times, indicating that the number of surge current detections of 100 (A) or more to less than 300 (A) was 3 times, LED 142 blinks 5 times, 300 (A) or more to 700 (A) ) Indicates that the number of detections of surge current less than 5 has occurred, LED 141 and 142 blink once at the same time, and the number of detections of surge current from 700 (A) to less than 1000 (A) is 1 time. It is displayed that there was.

  Further, the surge current operation history data stored in the memory 132 is read by the CPU 131 in response to a request from an external device (not shown) and sent from the I / O port 134 to the communication unit 137. The communication unit 137 performs modulation processing on the received operation history data, generates a transmission signal, and transmits the transmission signal to an external device. When performing PLC, the transmission signal generated by the communication unit 137 is transmitted to the external device via the base 51 in the DIN rail 50 of FIG. 7D connected to the power supply terminal 101.

  In the case where the sensor 138 is provided, the sensor 138 detects the separation state of the protection element in the protection circuit 40 and outputs it from the replacement identification terminal 103 to the outside via the control unit 130. .

(Effect of Example 1)
According to the protector 1 of the first embodiment, there are the following effects (a) to (d).

  (A) In order to detect the surge current between the ground and the ground, the detection coil 111 is disposed in the immediate vicinity of the grounding conductor 35 shown in FIG. 2C, the surge current flowing through the grounding conductor 35 is detected, and the waveform processing unit 120 Thus, the voltage waveform of the detected voltage is extended with respect to the time axis, and then the current value of the surge current is calculated by the CPU 131 in the control unit 130, so that a surge current having a small impulse can be detected with high accuracy. When detecting the surge current between the lines, the detection coil 111 may be disposed in the vicinity of a desired conductor other than the grounding conductor 35 in FIGS. 2A, 2B, and 2C.

  (B) Since the surge current is detected using the detection coil 111 and the detection result is stored in the memory 132 in the control unit 130, the number of detected surge currents, the magnitude, and the like can be grasped.

  (C) Since the number of parts constituting the motion display device 100 is small, the structure is simple. Since a small number of parts constituting the operation display device 100 are accommodated in the protector 100 or externally attached, the protector 1 can be easily downsized. Since the operation state of the protector 1 is displayed by the LEDs 141 and 142 constituting the display unit 140, visual observation from the outside is easy even if the protector 1 is downsized.

  (D) Since the communication unit 137 and the exchange identification terminal 103 are configured to output the data of the operation and deterioration state of the protector 1 to the outside, the plurality of protectors 1 installed at a plurality of positions respectively. The operation and the deterioration state can be collectively monitored by an external monitoring device or the like. The configuration of this protector monitoring system will be described in Example 2 etc. described later.

(Modification of the detection coil of Example 1)
13A, 13B, and 14 are perspective views showing modifications of the detection coil 111 in FIG.

FIG. 13A is a perspective view illustrating a state in which the detection coil 112 according to the modification is opened.
The detection coil 112 has a plate-like iron core 112a having elasticity, and a winding 112b made of an insulated wire covered with insulation is wound around the iron core 112a. The winding 112b is wound so as to be substantially parallel to the grounding conductor 35 or other conductors, and is disposed in the immediate vicinity of the grounding conductor 35 or other conductors.

  FIG. 13B is a perspective view showing a state in which the detection coil 112 of FIG. 13A is closed in a ring shape and arranged around the grounding conductor 35 or other conductors.

  If the detection coil 112 is opened as shown in FIG. 13A, brought into contact with the grounding conductor 35 or another conductor, closed in a ring shape and fixed with an adhesive tape or the like, the detection coil 112 is shown in FIG. 13B. Can be mounted on the outer periphery of the grounding conductor 35 or another conductor. Even if the structure of the ring-shaped detection coil 112 is modified, a surge current flowing through the grounding conductor 35 or other conductor can be detected with high accuracy.

  FIG. 14 is a perspective view showing a state in which the shield member 113 is provided on the outer periphery of the ring-shaped detection coil 112 of FIG. 13B.

  When a plurality of protectors 1 are arranged close to each other, the ring-shaped detection coils 112 provided in the adjacent protectors 1 interfere with each other and are adjacent to each other due to the influence of the detection coils 112 that detect the surge current. The other detection coil 112 may react. In such a case, as shown in FIG. 14, if the outer periphery of the ring-shaped detection coil 112 is electromagnetically shielded by the shield member 113 made of a magnetic metal, the above-described problem of mutual interference can be solved.

(Modification of the protector of Example 1)
FIG. 15A is a schematic perspective view illustrating a modified example of the protector 1 in FIGS. 7A, 7B, and 7C of the first embodiment. FIG. 15B is a schematic perspective view of the protector of FIG. 15A as viewed obliquely from above. FIG. 15C is a schematic front view of the protector of FIG. 15A when viewed from the front. Further, FIG. 15D is a perspective view of a DIN rail which is a device mounting rail in FIGS. 15B and 15C.

  In FIG. 15A, FIG. 15B, and FIG. 15C, only the principal part of the protector 200 is typically illustrated.

  Unlike the PLC-type protector 1 shown in FIGS. 7A, 7B, and 7C, the protector 200 of this modification has a non-PLC-type structure in which a power line and a communication line are separated.

  Like the protector 1, the protector 200 includes a jack panel 2 and an SPD plug 3. The protector 200 has a case 10 on the jack panel 2 side and an SPD plug 3 side. It is divided into a plug case 10-2. In the protector 200, similarly to the protector 1, a fixed claw 15 and a moving claw 16 are provided on the bottom surface of the jack case 10-1. The DIN rail 250 shown in FIG. 15D is sandwiched between the fixed claw 15 and the moving claw 16, and the jack board 2 is detachably fixed to the DIN rail 250.

  In the protector 200, between the fixed claw 15 and the moving claw 16, a pair of convex positive side communication is provided in the vicinity of the power terminal 101 including the pair of convex positive power source terminals 101 a and 101 b. The point from which the communication terminal 201 which consists of the terminal 201a and the negative electrode side communication terminal 210b is added differs from the protector 1. FIG. An insulating base 251 is disposed in the DIN rail 250 shown in FIG. 15D. On the base 251, from a pair of concave positive power terminal 252 a and negative power terminal 252 b, and a pair of concave positive communication terminal 253 a and negative communication terminal 253 b disposed in the vicinity thereof. A plurality of communication terminals 253 are provided at predetermined intervals. The plurality of power supply terminals 252 and the plurality of communication terminals 253 are connected to a conductive pattern (not shown) formed on the base 251.

  The power terminal 101 and the communication terminal 201 on the jack board 2 side are detachably inserted into the power terminal 252 and the communication terminal 253 on the DIN rail 250 side, respectively. In the protector 200, in the operation display device 100 shown in FIG. 3, the communication unit 137 is connected to the communication terminal 201 instead of the power supply terminal 101. The other structure of the protector 200 is the same as that of the protector 1.

  Such a non-PLC protector 200 also has substantially the same operational effects as the PLC protector 1.

(Configuration of Example 2)
FIG. 16A is a schematic configuration diagram illustrating an overview of a protector monitoring system according to Embodiment 2 of the present invention. FIG. 16B is a schematic configuration diagram showing the center unit in FIG. 16A. Further, FIG. 16C is a schematic configuration diagram showing the monitoring device in FIG. 16A.

  As shown in FIG. 16A, the protector monitoring system includes a plurality of protector panels 300 (for example, 300-1, 300-2, 300-3) installed at a plurality of monitoring locations. Each protector panel 300 is a device that protects a protected device 401 connected to a plurality of lines 400 such as a power line or a communication line at each monitoring point from intrusion of a surge current such as lightning. Each security device panel 300 is connected via each transmission device 410 (for example, 410-1, 410-2, 410-3) such as a router which is a communication device for interconnecting communication networks (networks). It is connected to a network 420 that is a communication path. A monitoring device 430 for remotely monitoring each security device panel 300 is connected to the network 420 via a transmission device 421 such as a router.

  Each protector panel 300 has a housing box 301 for housing the device. In each housing 301, a terminal board 302 connected to a plurality of lines 400 (for example, four lines) 400 and FIG. 15A for suppressing surge currents such as lightning entering each line of the lines 400 are respectively shown. The four protectors 200 shown (for example, 200-1, 200-2, 200-3, 200-4) and the operation states, operation histories, and the like of these four protectors 200-1 to 200-4 are counted. A center unit 310 for countering is provided.

  The terminal board 302 has four terminals 302a, 302b, 302c, and 302d connected to the four lines 400. The line side terminals 21 of the protectors 200 (= 200-1 to 200-4) are connected to the terminals 302a to 302d, respectively. The ground terminal 25 of each protector 200 is connected to a collective ground line 304 via a common ground line 303, and the collective ground line 304 is connected to the ground GND. Furthermore, the communication terminal 201 of each protector 200 is connected to the center unit 310 via each communication line 305 as a transmission path. An instrumental current transformer (Current Transformer, hereinafter referred to as “CT”) 306 for detecting surge current is attached to the collective ground line 304, and this CT 306 is connected to the center unit 310.

  The center unit 310 is, for example, approximately the same size as the protector 200 shown in FIG. 15A and has a structure that can be attached to the DIN rail 250 shown in FIG. 15D. As shown in FIG. 16B, in the center unit 310, a control unit 311 constituted by a CPU and the like, a memory 312 controlled by the control unit 311, an input unit 313, a detection unit 314, and an I / O port 315 are provided. , A display unit 316, a communication unit 317, and the like. The memory 312 is a storage device that stores data and programs, and is read / written (accessed) by the control unit 311. The input unit 313 inputs an operation signal or the like to the control unit 311 and includes a display button or the like. The detection unit 314 detects a surge current such as lightning flowing through the collective ground line 304 from the output current of the CT 306, and supplies this detection voltage to the control unit 311.

  The display unit 316 and the communication unit 317 are connected to the control unit 311 via the I / O port 315. The display unit 316 displays data and the like under the control of the control unit 311 and includes a liquid crystal display. The communication unit 317 transmits and receives data and the like with each protector 200 via the communication line 305.

  As shown in FIG. 16C, the monitoring device 430 monitors the operation state, operation history, and the like of the protectors 200-1 to 200-4 in each distant protector panel 300. The monitoring device 430 includes a control unit 431 configured by a CPU and the like, and a memory 432, an input unit 433, an output unit 434, an I / O port 435, a display unit 436, and a communication unit 437 controlled by the control unit 431. Etc., and is composed of a personal computer (hereinafter referred to as “PC”).

  The input unit 433 includes input devices such as a keyboard and a mouse. The output unit 434 includes an output device such as a printer. The display unit 436 is controlled by the control unit 431 via the I / O port 435, and includes a display device for displaying data and the like. The communication unit 437 is controlled by the control unit 431 via the I / O port 435 and transmits / receives data and the like to / from the outside.

  It should be noted that the number of lines 400, the number of protection device panels 300 installed, or the number of protection devices 200 provided in each protection device panel 300 can be changed to any number.

(Operation of Example 2)
For example, in each of the protectors 200 (= 200-1 to 200-4) provided in the protector panel 300-1, in the operation display device 100 shown in FIG. 3, the following (1) to (3) Perform proper processing.

  (1) When a surge current such as lightning flows through the grounding conductor 35 in the protector 200, this surge current is detected by the detection coil 111, and the current value is calculated by the control unit 130 via the waveform processing unit 120. And turn on the LEDs 141 and 142. Further, the calculated current value is stored in the memory 132 under the control of the control unit 130.

  (2) When the confirmation button 136 is pressed, the control unit 130 refers to the data stored in the memory 132 and performs the lighting process of the LEDs 141 and 142.

  (3) When an inquiry about the presence or absence of surge current is received from the communication unit 317 of the center unit 310 via the communication line 305, the CPU 131 in the control unit 130 refers to the data in the memory 132 and The presence / absence of a surge current and the current value are returned to the communication unit 317 of the center unit 310 via the port 134, the communication unit 137, and the communication line 305.

The center unit 310 performs the following processes (a) and (b).
(A) When a surge current flows through the collective grounding wire 304, the surge current is detected by the CT 306 and the detection unit 314, the current value is calculated by the control unit 311 and the current value is stored in the memory 312. Also set (time stamp).

  Further, the control unit 311 inquires each of the protectors 200 (= 200-1 to 200-4) about the presence or absence of surge current via the I / O port 315, the communication unit 317, and the communication line 305. . Thereafter, the control unit 311 stores the response contents (for example, presence or absence of surge current, current value, etc.) from each protector 200 in the memory 312. At the same time, the control unit 311 sends information including a time stamp to the response content from each protector 200 via the communication unit 317, the transmission device 410-1, the network 420, and the transmission device 421. Notify the communication unit 437.

  (B) When a display command is issued from the control unit 311 to the display unit 316 by pressing a display button of the input unit 313, the control unit 311 displays various information of each protector 200 stored in the memory 312. (For example, the date and time of operation history, current value, etc.) are displayed on the display unit 316.

  FIG. 17 is a diagram showing a display example of the display unit 316 in the center unit 310 of FIG. 16B.

  When the display button of the input unit 313 is pressed, the display unit 316 displays a history No. “No. 32”, date and time “2010/10/31, 18:30”, current value, total (CU) “700 (A)”, protector 200-1 “180 (A)”, protector 200- 2 "160 (A)", protector 200-3 "190 (A)", protector 200-4 "170 (A)" are displayed.

  Next, when the previous history button of the input unit 313 is pressed, a history No. is displayed on the display unit 316. “No. 31”, date and time “2010/10/20, 17:50, as current values, total (CU)“ 200 (A) ”, protector 200-1“ 80 (A) ”, protector 200-2 “No display”, protector 200-3 “50 (A)”, protector 200-4 “70 (A)” are displayed.

  In the display on the display unit 316, the “current value” may not be a numerical value. For example, “present” and “no” may be displayed, or “large”, “medium”, and “small” may be displayed. Further, the “current value” may display the “maximum current value” so far.

FIG. 18 is a diagram illustrating a display example of the display unit 436 in the monitoring apparatus 430 in FIG. 16C.
The display unit 436 includes a monitoring place “protector board 300-1”, “history No.”, “date / time”, “current value” as operation history information, and center unit 310 and protectors 200-1, 200 as various information. “Installation date” of “−2, 200-3, 200-4”, “maximum current value → protector replacement necessity”, “protector deterioration signal presence → protector replacement necessity” are displayed.

(Effect of Example 2)
According to the second embodiment, a plurality of (for example, four) protectors 200-1 to 200-4 and a center unit 310 are accommodated in each protector panel 300. The operation states and operation histories of the protectors 200-1 to 200-4 are counted. Therefore, by transmitting the count result to the external monitoring device 430, the monitoring device 430 side can easily monitor the operations and deterioration states of the plurality of protectors 200-1 to 200-4 collectively. .

(Modification of center unit of embodiment 2)
FIG. 19 is a configuration diagram showing a modification of the center unit 310 of FIG. 16B.
In the center unit 320 of this modification, the display unit 316 in the center unit 310 of FIG. 16B is omitted, and a plurality of display connection terminals 321 and 322 are provided instead of the display unit 316, and the connection terminals 321 and 322 are provided. Are connected to the I / O port 315. Other configurations are the same as those of the center unit 310 in FIG. 16B.

  In the center unit 320, for example, a portable display device 330 is connected to the connection terminal 321, and the operation state and operation history of each protector 200 are confirmed on the display screen of the display device 330. Alternatively, a portable PC 331 is connected to the connection terminal 322, and the operation state and operation history of each protector 200 are confirmed on the screen of the PC 331.

  According to the center unit 320 of this modified example, since the display unit is omitted, the size and cost can be further reduced. Also, for example, when performing maintenance on a device, it is common practice to connect a tester to the device to check. From the same idea, the display unit 330 and the PC 331 can be connected to the center unit 320 to check the operation state, operation history, and the like of each protector 200, which is convenient.

(Configuration of Example 3)
FIG. 20 is a schematic configuration diagram illustrating an overview of the protector monitoring system according to the third embodiment of the present invention. In FIG. 20, elements common to those in FIGS. 16A and 16B showing the second embodiment are denoted by common reference numerals.

  The protector monitoring system according to the third embodiment includes a plurality of protector panels 500 (for example, 500-1, 500-2, 500-3) installed at a plurality of monitoring locations. As in the second embodiment, each protector panel 500 is a device that protects a protected device 401 connected to a plurality of lines 400 at each monitoring location from intrusion of surge current such as lightning. Similarly to the second embodiment, each protector panel 500 is connected to the network 420 via each transmission device 410 (for example, 410-1, 410-2, 410-3). As in the second embodiment, a monitoring device 430 is connected to the network 420 via the transmission device 421.

  In each housing box 501 of each protector panel 500, there are four protectors 510 (for example, 510-1, 510) having different configurations from the terminal board 302 similar to the second embodiment and the protector 200 of the second embodiment. -2, 510-3, 510-4) and a center unit 520 having a configuration different from that of the center unit 310 of the second embodiment is provided.

  Each protector 510 includes a line-side terminal 21 and a ground terminal 25 similar to the protector 200 of the second embodiment, and a wireless communication unit 511 different from the communication terminal 201 of the second embodiment. The line side terminal 21 of each protector 510 is connected to the terminal board 302 as in the second embodiment. Similarly to the second embodiment, the ground terminal 25 of each protector 510 is connected to the collective ground line 304 via the common ground line 303, and the collective ground line 304 is connected to the ground GND. Further, unlike the wired communication of the second embodiment, the wireless communication unit 511 of each protector 500 is configured to transmit / receive data and the like to / from the center unit 520 by wireless communication. That is, the wireless communication unit 511 in the protector 500 of the third embodiment is provided in the operation display device 100 instead of the communication unit 137 in FIG.

  As with the center unit 310 of the second embodiment, the center unit 520 is, for example, approximately the same size as the protector 200 shown in FIG. 15A and can be mounted on the DIN rail 250 shown in FIG. 15D. Yes. The center unit 520 of the third embodiment is different from the second embodiment in that a wireless communication unit 521 is provided instead of the communication unit 317 in the center unit 310 of the second embodiment. The wireless communication unit 521 of the center unit 520 has a function of transmitting and receiving data and the like wirelessly to the wireless communication unit 511 on each protector 510 side. Other configurations are the same as those of the second embodiment.

  As in the second embodiment, the number of lines 400, the number of protector panels 500 installed, or the number of protectors 510 provided in each protector panel 500 can be changed to any number.

(Operation of Example 3)
In each protector 510, when the wireless communication unit 521 of the center unit 520 receives an inquiry about the presence or absence of surge current wirelessly, the wireless communication unit 521 of the center unit 520 wirelessly checks whether or not there is a surge current. Answer the current value.

  The center unit 520 makes an inquiry about the presence or absence of surge current to each protector 510 wirelessly. After that, the center unit 520 saves the response contents from each protector 510 as well as the second embodiment, and transmits information with a time stamp to the response contents from each protector 510, the transmission device 410-1, The monitoring device 430 is notified via the network 420 and the transmission device 421.

(Effect of Example 3)
According to the third embodiment, there are almost the same effects as the second embodiment. In particular, in the third embodiment, each protector 510 and the center unit 520 are configured to transmit and receive data and the like wirelessly, so that the wiring in each protector panel 500 can be simplified.

(Configuration of Example 4)
FIG. 21 is a schematic configuration diagram showing an outline of a protector monitoring system according to the fourth embodiment of the present invention. 22A is a schematic perspective view showing an installation state of the four protectors in FIG. 21. FIG. 22B is a schematic plan view of FIG. 22A. In FIG. 21, FIG. 22A and FIG. 22B, the same reference numerals are given to the same elements as those in FIG. 16A, FIG. 16B and FIG.

  The protector monitoring system according to the fourth embodiment includes a plurality of protector panels 600 (for example, 600-1, 600-2, 600-3) installed at a plurality of monitoring locations. As in the second embodiment, each protector panel 600 is a device that protects a protected device 401 connected to a plurality of lines 400 at each monitoring point from intrusion of surge current such as lightning. Similarly to the second embodiment, each protector panel 600 is connected to the network 420 via each transmission device 410 (for example, 410-1, 410-2, 410-3). As in the second embodiment, a monitoring device 430 is connected to the network 420 via the transmission device 421.

  Similarly to the second embodiment, the terminal box 302 and the four protectors 200 (for example, 200-1, 200-2, 200-3, 200-4) are placed in the housing box 601 of each protector panel 600. And a center unit 310 are provided.

  Each protector 200 has a line-side terminal 21 and a ground terminal 25 similar to those in the second embodiment. The line-side terminal 21 is connected to a terminal board 302, and the ground terminal 25 connects a common ground line 303. To the collective ground line 304.

  The four protectors 200-1 to 200-4 and the center unit 310 are detachably attached to the DIN rail 250 of the second embodiment shown in FIG. 15D, as shown in FIG. 16A of the second embodiment. Different. The power terminals 101 and communication terminals 201 of the four protectors 200-1 to 200-4 and the power terminals and communication terminals (not shown) of the center unit 310 are the power terminal 252 and the communication on the base 251 of the DIN rail 250. The four protectors 200-1 to 200-4 and the center unit 310 are connected to the terminals 253, respectively, and are connected to each other. Other configurations are the same as those of the second embodiment.

  As in the second embodiment, the number of lines 400, the number of protector panels 600 installed, or the number of protectors 200 provided in each protector panel 600 can be changed to any number.

(Operation of Example 4)
In each protector 200, when an inquiry about the presence or absence of surge current is received from the communication unit 317 of the center unit 310 via the DIN rail 250, the communication unit 317 of the center unit 310 is connected to the communication unit 317 via the DIN rail 250. Answer the presence or absence of surge current and current value.

  The center unit 310 inquires of each protector 200 about the presence or absence of surge current via the DIN rail 250. Thereafter, as in the second embodiment, the center unit 310 stores the response content from each protector 200 and transmits information with a time stamp added to the response content from each protector 200 to the transmission device 410-1, The monitoring device 430 is notified via the network 420 and the transmission device 421.

  The base 251 of the DIN rail 250 in the fourth embodiment has a configuration that does not use a PLC system in which a power line and a communication line are mounted. When the protector 200 is attached to the DIN rail 250, the power terminal 101 and the communication terminal 201 on the bottom surface of the protector 200 and the power terminal 252 and the communication terminal 253 of the base 251 are detachably inserted. Yes. In the case of such a structure, it becomes possible to add a plug and play function. In plug and play, a predetermined process is automatically performed when a device and a device are connected (for example, when a power source is energized between devices by connecting the device and the device). It is a function. That is, in the fourth embodiment, when the protector 200 is attached to the DIN rail 250, power is supplied to the protector 200, so that a plug and play function can be added.

FIG. 23 is a flowchart showing processing of the plug and play function.
In the process of the plug and play function, the process of steps ST30 to ST34 is performed on the protector 200 side, and the process of steps ST40 to ST44 is performed on the center unit 310 side.

  First, in step ST30 on the protector 200 side, when the protector 200 (for example, 200-1) is attached to the DIN rail 250 to which the center unit 310 is attached, the power supply terminal 101 on the protector 200-1 side and The communication terminal 201 is electrically connected to a power supply terminal and a communication terminal (not shown) on the center unit 310 side via the base 251 of the DIN rail 250. Thereby, the center unit 310 recognizes that the protector 200 is attached and automatically starts communication with the attached protector 200.

  In step ST31, protector 200-1 transmits a registration command (for example, a unique number such as an ID number of protector 200-1) from communication terminal 201. The transmitted registration command is sent to the center unit 310 via the base 251. Thereafter, in step ST32, the protector 200-1 waits for an answer indicating whether or not its registration command has been registered on the center unit 310 side.

  On the other hand, when the center unit 310 receives the registration command sent from the protector 200-1 in step ST40, the center unit 310 assigns the unique number of the attached protector 200-1 in step ST41, and the protector 200 -1 device ID is determined. Further, in step ST42, the center unit 310 registers the protector 200-1 as a monitoring target, and in step ST43, transmits information on registration completion including the device ID to the protector 200-1. Further, in step ST44, the center unit 310 transmits information indicating that the monitoring target has been added to the monitoring device 430. As a result, the monitoring device 430 stores the monitoring target in the memory 432 and adds it.

  When registration completion information including the device ID is transmitted to the protector 200-1 in step ST43, the protector 200-1 receives the device ID in step ST33, and then receives the device ID in step ST34. The ID is set by storing it in the memory 132 or the like. Thereby, the process of the plug and play function ends.

  7A, FIG. 7B, FIG. 7C, and FIG. 7D of the first embodiment, when the PLC type plug and play function is realized using the protector 1 and the DIN rail 50, the DIN rail 50 is provided. Communication may be performed between the protector 1 and the center unit 310 using the power line of the base 51.

(Effect of Example 4)
According to the fourth embodiment, there are almost the same effects as the second embodiment. In particular, in the fourth embodiment, the plurality of protectors 200 or the plurality of protectors 1 and the center unit 310 are provided on the DIN rail 250 provided with the base 251 or the DIN rail 50 provided with the base 51. Since it is configured to be detachable, a plug and play function can be added. Thereby, the wiring in each protector panel 600 can be simplified.

(Other variations)
The present invention is not limited to the above-described embodiments and modifications, and various other forms of use and modifications are possible. For example, the following forms (A) to (E) are used as the usage forms and modifications.

  (A) The protectors 1, 200 and 510 have a structure in which the jack panel 2 and the SPD plug 3 are separated, but the jack panel 2 and the SPD plug 3 may be modified into a single structure. . The protectors 1, 200 and 510 are structured to be mounted on the DIN rails 50 and 250, but may be changed to a structure that is attached to a member other than the DIN rail with a screw or the like.

  (B) The protectors 1, 200, 510 may be changed to a circuit configuration other than that shown in the figure.

  (C) In the protective device panels 300, 500, and 600, a plurality of internal protective devices 200 and 510 may be changed to an arrangement form other than that shown, or other circuit components may be added.

  (D) The protector monitoring system using a plurality of protector panels 300, 500, 600 may be changed to a form other than that shown in the figure.

  (E) The protectors 1, 200, 510 and the center units 310, 320, 520 may not necessarily be accommodated in the protector panels 300, 500, 600 or the accommodating boxes 301, 501, 601. For example, you may make it comprise the protector monitoring unit which consists of protector 1,200,510 and center unit 310,320,520.

1,200 (200-1, 200-2, 200-3, 200-4), 510 (510-1, 510-2, 510-3, 510-4) Guard 2 Jack panel 3 SPD plug 10 Case 40 , 40-1, 40-2, 40-3 Protection circuit 50, 250 DIN rail 51,251 Base 100 Operation display device 110 Detection unit 111, 112 Detection coil 113 Shield member 120 Waveform processing unit 130 Control unit 140 Display unit 141, 142 LED
300 (300-1, 300-2, 300-3), 500 (500-1, 500-2, 500-3), 600 (600-1, 600-2, 600-3) Guard plate 310, 320 520 Center unit 400 Line 401 Protected equipment 430 Monitoring device

Claims (13)

A case provided with a plurality of external terminals connected to the track;
A protection circuit that is housed in the case, connected to the plurality of external terminals via a conductor, and suppresses a surge current that enters the conductor; and
An operation display device that is built in the case or externally attached to the case and that detects the surge current flowing through the conductor and displays the operation state of the protection circuit;
A protector equipped with
The operation display device includes:
A detector having a detection coil disposed in the vicinity of the conducting wire and outputting an induced current induced by the surge current flowing through the conducting wire;
A waveform processing unit that converts the induced current into a voltage and outputs a deformation processing waveform;
A control unit for determining the surge current calculation results from the voltage value of the deformation process waveform,
The display is controlled by the control unit and is visible from the outside, and displays the surge current calculation result ,
The detection coil is
A core coil in which a winding is wound around an iron core, the winding direction of the winding being arranged in the vicinity of the conducting wire so as to be substantially perpendicular or substantially parallel to the conducting wire,
The waveform processing unit
A current / voltage conversion unit that converts the induced current into a voltage to generate a detection voltage;
A time constant circuit that extends the voltage waveform of the detection voltage with respect to the time axis and outputs the deformation processing waveform, and
The controller is
Based on the correlation data, calculating the current value of the surge current from the voltage value of the deformation processing waveform to obtain the surge current calculation result,
A protector characterized by. The detector is
The detection coil;
A shield member made of a magnetic metal surrounding the detection coil;
The protector according to claim 1, comprising: The bottom of the case is
The protector according to claim 1 or 2, wherein the protector has a structure that can be detachably attached to a device mounting rail. The line is a power line or a communication line and a ground line,
The said protection circuit is comprised so that any one of a single or several arrester, a single or several varistor, and the combination of an arrester and a varistor may be comprised. The protector according to any one of the above. The current / voltage conversion unit is configured by a resistor,
The time constant circuit is constituted by a series circuit of a resistor and a capacitor,
The protector of any one of Claims 1-4 characterized by the above-mentioned. The controller is
An input port for inputting the deformation processing waveform;
An output port for outputting the surge current calculation result to the display unit;
Input / output ports for signal input / output,
A memory for storing data including the correlation data between the voltage value of the deformation processing waveform and the current value of the surge current;
Based on correlation data, a central processing unit for calculating the current value of the surge current from the voltage value of the deformation processing waveform and obtaining the surge current calculation result,
The protector according to any one of claims 1 to 5, wherein the protector is configured by a microcontroller having the following. The protector according to any one of claims 1 to 6, wherein the display unit includes a light emitting element that lights and displays the surge current calculation result. A storage box in which one or more of the protectors according to any one of claims 1 to 7 are stored;
A center unit that is disposed in the housing box, performs wired communication or wireless communication with the protector, and stores an operation state and an operation history of the protector;
A protector panel characterized by comprising A storage box in which one or more of the protectors according to any one of claims 1 to 7 are stored;
A center unit that is disposed in the housing box, communicates with the protector via a transmission line, and stores an operation state and an operation history of the protector;
A security device board with
The transmission path is
A device mounting rail for detachably mounting the protector and the center unit;
A base for electrically connecting the protector and the center unit, disposed in the equipment mounting rail;
A protective device panel characterized by comprising: One or more protectors according to any one of claims 1 to 7;
A center unit that is disposed in the vicinity of the protector, performs wired communication or wireless communication with the protector, and stores an operation state and an operation history of the protector;
A protector monitoring unit characterized by comprising: One or more protectors according to any one of claims 1 to 7;
A center unit that is disposed in the vicinity of the protector, communicates with the protector via a transmission line, and stores an operation state and an operation history of the protector;
A protective device monitoring unit comprising:
The transmission path is
A device mounting rail for detachably mounting the protector and the center unit;
A base for electrically connecting the protector and the center unit, disposed in the equipment mounting rail;
A protector monitoring unit comprising: The protective device panel according to claim 8 or 9 installed at one or more places,
A monitoring device that communicates with the protective equipment panel and remotely monitors the protective equipment board;
A protector monitoring system characterized by comprising: The protective device monitoring unit according to claim 10 or 11 installed at one or a plurality of locations,
A monitoring device that communicates with the protector monitoring unit and remotely monitors the protector monitoring unit;
A protector monitoring system characterized by comprising:

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