KR102623469B1 - Sensor housing disconnection detection and switchboard monitoring system - Google Patents

Abstract

The present invention operates with electrical energy generated using energy harvesting to detect whether the sensor housing coupled to the busbar mounted inside the distribution board is separated, and detects whether the sensor housing is separated using energy harvesting to monitor the distribution board. and a switchboard monitoring system.
In addition, when it is detected that the fastening member that connects the sensor housing to the busbar is separated or spaced from the busbar, the separation signal of the fastening member is notified to the outside so that action can be taken, improving the accuracy and reliability of various data measured by the sensor housing. You can do it.

Description

Sensor housing disconnection detection and switchboard monitoring system using energy harvesting { Sensor housing disconnection detection and switchboard monitoring system }

The present invention relates to a system for detecting whether a sensor housing mounted on a busbar is separated, and in particular, detecting whether a sensor housing coupled to a busbar mounted inside a distribution board is separated using electrical energy generated using energy harvesting. , It is about a switchboard monitoring system that detects whether the sensor housing is separated and uses energy harvesting to monitor the switchboard.

In general, since the voltage applied to the primary side after switchboard construction is high voltage (22900V), there is a disadvantage that in order to enter the switchboard and check its operating status, the applied voltage must be blocked and checked with the naked eye.

In addition, accidents such as short circuits, overcurrents, arcs, and electric leaks occur in switchboards, resulting in power outages and electrical accidents without warning, so a system is needed to continuously check the status of the switchboard and warn before accidents occur.

For this purpose, various sensors, including temperature sensors, are installed on the busbar installed inside the switchboard.

However, for various reasons, it often happens that the temperature sensor mounted on the busbar is separated or loosely spaced, and in this case, an error may occur in measuring the actual temperature of the busbar from the temperature sensor.

Public patent 10-2020-0132456 Public patent 10-2019-0088264

The present invention is intended to solve the above-mentioned problems, and is a sensor housing using energy harvesting that can quickly determine whether the sensor installed on the busbar is correctly installed on the busbar and prevent errors from occurring in the measurement data through the sensor. The purpose is to provide a separation detection and distribution board monitoring system.

In order to achieve the above object, the system for detecting whether a sensor housing is separated and monitoring a switchboard using energy harvesting of the present invention includes a busbar disposed inside the switchboard; A sensor housing mounted on the busbar; a temperature sensor unit mounted on the sensor housing to measure the temperature of the busbar; a transmitter mounted on the sensor housing and wirelessly transmitting data measured by the temperature sensor unit; a self-generating module mounted on the sensor housing to generate electrical energy by collecting leakage magnetic fields around the busbar; a fastening member that couples the sensor housing to the busbar; a fastening detection sensor coupled to the sensor housing to detect whether the fastening member is coupled to the busbar; a receiver that wirelessly receives data transmitted from the transmitter; a display externally displaying the data received from the receiver and the live state of the busbar; and a control unit that controls the temperature sensor unit and the transmitter, wherein the temperature sensor unit and the transmitter are operated with electrical energy generated by the self-generating module, and the fastening member is coupled to the busbar in the fastening detection sensor. When detected, the control unit operates the temperature sensor unit and the transmitter, and when the fastening detection sensor detects that the fastening member is separated or spaced from the busbar while the temperature sensor unit and the transmitter are operating, the control unit Sends a separation signal of the fastening member to the receiver through the transmitter, and the display externally displays the separation signal of the fastening member received through the receiver.

The fastening detection sensor protrudes from the sensor housing in the direction of the busbar. When the fastening member is coupled to the busbar, the fastening detection sensor is turned on while in contact with the busbar and detects that the fastening member is coupled to the busbar. .

It further includes an earthquake detection sensor mounted on the sensor housing, wherein when the fastening detection sensor detects that the fastening member is coupled to the busbar, the control unit operates the earthquake detection sensor.

and a humidity sensor mounted on the sensor housing to measure humidity inside the switchboard. When the measured value measured by the humidity sensor exceeds a preset reference value, the control unit detects excessive moisture inside the switchboard. A signal is transmitted to the receiver through the transmitter.

The fastening member consists of a band that penetrates the sensor housing.

The fastening member includes a coupling surface coupled to the sensor housing; It includes a pair of close contact portions protruding in the direction of the busbar on both sides of the engaging surface portion, and in a state where the busbar is inserted and disposed between the engaging surface portion and the close contact portion, the end of the close contact portion is a fixing member. They are fixedly coupled to each other to prevent the fastening members from being separated from the busbar.

The close contact portion is rotatably coupled to both sides of the engaging surface portion, and the fastening member has one end coupled to the engaging surface portion and the other end coupled to the close contact portion, as long as it is disposed inside the engaging surface portion and inside the close contact portion. It further includes a pair of first wires, and when the busbar is inserted and disposed inside the coupling surface portion and the close contact portion, the first wire is bent while in contact with the outer peripheral surface of the busbar so that the close contact portion moves in the direction of the busbar. Rotate it so that it adheres tightly.

The close contact portion is rotatably coupled to both sides of the coupling surface portion, and the fastening member includes a rack gear that penetrates the coupling surface portion in a vertical direction and has gears formed on both sides; a pinion gear disposed on both sides of the rack gear, engaged with the rack gear, and rotatably coupled to the engaging surface; a torsion spring mounted on a rotation hinge point of the coupling surface portion and the close contact portion to apply a force to rotate the close contact portion inward; It further includes a second wire, one end of which is coupled to the pinion gear and the other end of which is coupled to the close contact portion, wherein the busbar protrudes downward when the busbar is inserted and disposed between the engaging surface portion and the close contact portion. The rack gear rotates the pinion gear while being pushed up by the busbar, and as the second wire wound around the pinion gear is released by the rotation of the pinion gear, the close contact portion is moved to the booth by the elastic restoring force of the torsion spring. It rotates in the direction of the bar and comes into close contact with the outer peripheral surface of the busbar.

The fastening detection sensor detects whether the rack gear is raised or lowered. When the rack gear is pushed up by the busbar, the fastening detection sensor detects that the fastening member is coupled to the busbar, and when the rack gear is lowered, the fastening detection sensor detects whether the rack gear is raised or lowered. It is detected that the fastening member is separated or spaced from the busbar.

The fastening member further includes a first spring that pushes the rack gear downward, wherein the first spring is compressed when the rack gear is raised, and the elasticity of the first spring is increased when the busbar is separated. The rack gear descends due to the restoring force.

According to the system for detecting whether the sensor housing is separated and monitoring the distribution board using energy harvesting of the present invention as described above, the following effects are achieved.

The present invention allows the sensor housing to operate automatically when mounted on the busbar, and displays externally when the sensor housing is separated or spaced from the busbar, so that workers or managers can immediately identify this and take action. You can.

Through this, errors can be prevented from occurring in various data (temperature, etc.) measured while the sensor housing is mounted on the busbar, and the accuracy and reliability of the measured data can be improved.

1 is a cross-sectional view of the sensor housing according to the first embodiment of the present invention mounted on a busbar;
2 is a cross-sectional structural diagram of a sensor housing according to a second embodiment of the present invention;
3 is a cross-sectional structural diagram of a sensor housing according to a third embodiment of the present invention;
Figure 4 is a cross-sectional view of the sensor housing of Figure 3 mounted on a busbar;
Figure 5 is a cross-sectional structural diagram of a sensor housing according to a modified third embodiment of the present invention;
6 is a cross-sectional structural diagram of the sensor housing according to the fourth embodiment of the present invention;
Figure 7 is a cross-sectional view of the sensor housing of Figure 6 mounted on a busbar;

First embodiment

Figure 1 is a cross-sectional view of the sensor housing according to the first embodiment of the present invention mounted on a busbar.

As shown in FIG. 1, the system for detecting whether the sensor housing is separated and monitoring the distribution board using energy harvesting of the present invention includes a busbar (1), a sensor housing (10), a temperature sensor unit (11), It includes a transmitter 12, a self-generating module 13, a fastening member 20, a fastening detection sensor 30, a receiver 42, a display 45, and a control unit 40.

The busbar 1 is disposed inside the switchboard.

The sensor housing 10 is mounted on the busbar 1.

The temperature sensor unit 11 is mounted inside the sensor housing 10 and measures the temperature of the busbar 1.

The transmitter 12 is mounted inside the sensor housing 10 and wirelessly transmits data measured by the temperature sensor unit 11 to the receiver 42.

The self-power generation module 13 is mounted inside the sensor housing 10 and collects leakage magnetic fields around the busbar 1 to generate electrical energy.

Since it is sufficient to use a conventionally known structure for the specific structure of the self-power generation module 13, a detailed description thereof will be omitted.

The electric energy generated by the self-generating module 13 is supplied to the temperature sensor unit 11, the transmitter 12, etc. to operate.

The self-power generation module 13 includes a battery to store the generated electrical energy.

The fastening member 20 couples the sensor housing 10 to the busbar 1.

The fastening detection sensor 30 is coupled to the sensor housing 10 and detects whether the fastening member 20 is coupled to the busbar 1.

The receiver 42 wirelessly receives data transmitted from the transmitter 12.

The display 45 externally displays data received from the receiver 42 and the live state of the busbar.

The status inside the switchboard can be monitored through the display 45.

The control unit 40 controls the temperature sensor unit 11 and the transmitter 12.

When the coupling detection sensor 30 detects that the coupling member 20 is coupled to the busbar 1, the control unit 40 operates the temperature sensor unit 11 and the transmitter 12.

Therefore, it is possible to prevent the battery constituting the self-power generation module 13 from being consumed unnecessarily when the sensor housing 10 of the present invention is not mounted on the busbar 1, and the fastening member 20 When the sensor housing 10 is fastened to the busbar 1, various parts mounted inside the sensor housing 10 are automatically operated by the fastening detection sensor 30 and the control unit 40. Make it as convenient as possible to use.

And, when the fastening detection sensor 30 detects that the fastening member 20 is separated or spaced from the busbar 1 while the temperature sensor unit 11 and the transmitter 12 are operating, the control unit (40) transmits a separation signal of the fastening member (20) to the receiver (42) through the transmitter (12).

The signals and data transmitted to the receiver 42 are transmitted to the display 45, and the display 45 externally displays the separation signal of the fastening member 20 received through the receiver 42.

Through this, the manager can quickly and easily determine whether the sensor housing 10, while fastened to the busbar 1, is spaced or separated due to external force, etc., preventing the temperature of the busbar 1 from being accurately measured. You can.

The engagement detection sensor 30 may have various shapes and structures.

In this embodiment, the engagement detection sensor 30 protrudes from the sensor housing 10 toward the busbar 1.

When the fastening member 20 is coupled to the busbar 1, the fastening detection sensor 30 is turned on while in contact with the busbar 1, and the fastening member 20 is coupled to the busbar 1. I sense that it has been done.

And, when the fastening detection sensor 30 is suddenly turned OFF from the ON state, the control unit 40 determines that the fastening member 20 is separated or spaced from the busbar 1, and the transmitter 12 ) to send a separation signal of the fastening member 20 to the receiver 42.

The present invention can be achieved by further including an earthquake detection sensor 14 and a humidity sensor 15.

The earthquake detection sensor 14 is mounted on the sensor housing 10.

When the coupling detection sensor 30 detects that the coupling member 20 is coupled to the busbar 1, the control unit 40 operates the earthquake detection sensor 14.

The earthquake detection sensor 14 detects vibration transmitted through the busbar 1, and when an earthquake is detected, transmits related information to the receiver 42 through the transmitter 12, so that the manager can can be detected and dealt with in advance.

The humidity sensor 15 is mounted on the sensor housing 10 and measures the humidity inside the switchboard.

If the humidity inside the switchboard becomes high and this is prevented, there is a high risk of malfunction of the temperature sensor unit 11 or electric shock due to electricity flowing from the busbar 1.

In the present invention, the humidity sensor 15 is mounted inside the switchboard, and when the measured value measured by the humidity sensor 15 exceeds a preset reference value, the control unit 40 detects excessive moisture inside the switchboard. A signal is transmitted to the receiver 42 through the transmitter 12.

Through this, the manager can easily determine the humidity inside the switchboard, and if moisture flows into the switchboard exceeding the standard value, the temperature sensor unit 11 of the present invention may malfunction, or the busbar 1 may malfunction. Preliminary measures can be taken to prevent electric shock caused by electricity flowing in the area.

In this embodiment, the fastening member 20 is made of a band that penetrates the sensor housing.

The band-type fastening member 20 surrounds the busbar 1 and is firmly coupled.

As described above, the present invention allows the sensor housing 10 to operate automatically when mounted on the busbar 1, and immediately detects when the sensor housing 10 is separated or spaced from the busbar 1. You can take action.

In particular, after installing the sensor housing 10 on the busbar 1, the manager can check whether the sensor housing 10 is properly installed on the busbar 1 through the fastening detection sensor 30. You can easily figure it out without visiting in person and checking with the naked eye.

Through this, the accuracy and reliability of various data (temperature, etc.) measured while the sensor housing 10 is mounted on the busbar 1 can be improved.

In addition, by installing the earthquake detection sensor 14, it is possible to detect in advance earthquakes transmitted through the busbar 1, etc., and by installing the humidity sensor 15, moisture flowing into the switchgear can cause damage to parts. Malfunction or electric shock can be prevented.

Second embodiment

Figure 2 is a cross-sectional structural diagram of a sensor housing according to a second embodiment of the present invention.

The second embodiment has a difference in the fastening member 20 compared to the first embodiment, and the description will focus on this.

As shown in FIG. 2, the fastening member 20 consists of a coupling surface portion 21 and a close contact portion 22.

The coupling surface portion 21 is coupled to one surface of the sensor housing 10.

The close contact portions 22 are comprised of a pair and protrude from both sides of the engaging surface portion 21 in the direction of the busbar 1.

In a state where the busbar 1 is inserted and disposed between the engaging surface portion 21 and the close contact portion 22, the ends of the close contact portion 22 are fixedly coupled to each other by the fixing member 50. It prevents the member 20 from being separated from the busbar 1.

At this time, the fixing member 50 may be made of various fixing means such as wire, bolt, and nut.

In this embodiment, the coupling surface portion 21 and the close contact portion 22 are made of an integrated leaf spring made of an insulating material.

The pair of close contact portions 22 arranged to face each other are inclined in a direction facing each other.

When the busbar 1 is inserted into the fastening member 20, the fastening member 20 made of a leaf spring is forcibly expanded.

When the busbar 1 passes between a pair of mutually spaced close contact portions 22, the close contact portions 22 are forcibly elastically deformed in a direction away from each other due to the diameter of the busbar 1. When the busbar 1 is placed inside the fastening member 20, the elastically deformed close contact portion 22 is restored and comes into close contact with the outer peripheral surface of the busbar 1.

Through this, the fastening member 20 can be brought into close contact with the busbar 1.

Thereafter, the ends of the spaced apart portions 22 are connected to each other using the fixing member 50 to prevent the fastening member 20 from being separated from the busbar 1.

In the present invention, the sensor housing 10 can be easily fastened to the busbar 1 by the fastening member 20, and the sensor can be easily fastened to the busbar 1 by the fastening member 20. It can be easily seen that the housing 10 is separated or spaced apart from the busbar 1.

Since other matters are similar to the first embodiment, detailed description thereof will be omitted.

Third embodiment

Figure 3 is a cross-sectional structural diagram of the sensor housing according to the third embodiment of the present invention, Figure 4 is a cross-sectional view of the sensor housing of Figure 3 mounted on a busbar, and Figure 5 is a modified third embodiment of the present invention. This is a cross-sectional structure of the sensor housing.

The third embodiment has a difference in the fastening member 20 compared to the first embodiment, and the description will focus on this.

As shown in FIGS. 3 and 4, the fastening member 20 includes a coupling surface portion 21, a close contact portion 22, and a first wire 23.

The coupling surface portion 21 is coupled to one surface of the sensor housing 10.

The close contact portions 22 are comprised of a pair and protrude from both sides of the engaging surface portion 21 in the direction of the busbar 1.

This pair of close contact portions 22 are rotatably coupled to both sides of the engaging surface portion 21.

The first wire 23 is made up of a pair, one end of each of which is coupled to the coupling surface 21 and the other end of each of which is coupled to the close contact part 22, and the inside of the coupling surface 21 is in close contact with the first wire 23. It is disposed inside the part 22.

In this structure, when the busbar 1 is inserted and placed inside the coupling surface portion 21 and the close contact portion 22, the first wire 23 inside it is It is bent while in contact with the outer peripheral surface of the busbar (1) so that the close contact portion (22) rotates in the direction of the busbar (1) to come into close contact with it.

Thereafter, the ends of the close contact portions 22 are fastened to each other with the fixing members 50.

In this embodiment as above, when the busbar 1 is inserted and placed inside the fastening member 20, the close contact portion 22 rotates by the first wire 23 and the busbar 1 It can be brought into close contact with the outer peripheral surface of the busbar 1, and through this, the ends of the pair of close contact parts 22 in close contact with the outer peripheral surface of the busbar 1 can be easily fastened with the fixing member 50.

At this time, the first wire 23 is made of an elastic material and expands when the busbar 1 is inserted into the fastening member 20, and the busbar 1 is connected to the fastening member 20. ), it can be restored to its original state and the close contact portion 22 can be automatically opened to its original position.

Additionally, as shown in FIG. 5, the pair of first wires 23 may be arranged to cross each other.

That is, the middle portions of the pair of first wires 23 cross each other, and one end connected to the coupling surface portion 21 and the other end connected to the close contact portion 22 are disposed far from each other.

With this structure, when the busbar 1 is inserted into the fastening member 20, the close contact portion 22 can be brought into closer contact with the outer peripheral surface of the busbar 1.

Since other matters are similar to the first embodiment, detailed description thereof will be omitted.

Embodiment 4

Figure 6 is a cross-sectional structural diagram of the sensor housing according to the fourth embodiment of the present invention, and Figure 7 is a cross-sectional view of the sensor housing of Figure 6 mounted on a busbar.

The fourth embodiment has a difference in the fastening member 20 compared to the first embodiment, and the description will focus on this.

As shown in FIGS. 6 and 7, the fastening member 20 includes an engaging surface portion 21, a close contact portion 22, a rack gear 24, a pinion gear 25, and a torsion spring 26. ) and a second wire 27.

The coupling surface portion 21 is coupled to one surface of the sensor housing 10.

The close contact portions 22 are comprised of a pair and protrude from both sides of the engaging surface portion 21 in the direction of the busbar 1.

This pair of close contact portions 22 are rotatably coupled to both sides of the engaging surface portion 21.

The rack gear 24 penetrates the engaging surface portion 21 in the vertical direction and has gears formed on both sides.

The rack gear 24 is mounted to move in the vertical direction while penetrating the engaging surface portion 21.

The pinion gear 25 is disposed on both sides of the rack gear 24, meshes with the rack gear 24, and is rotatably coupled to the engaging surface portion 21.

The torsion spring 26 is mounted on the rotational hinge point of the engaging surface portion 21 and the close contact portion 22 and applies force so that the close contact portion 22 rotates in the inward direction of the fastening member 20. do.

One end of the second wire 27 is coupled to the pinion gear 25 and the other end is coupled to the close contact portion 22.

At this time, one end of the second wire 27 is wound around the outer peripheral surface of the pinion gear 25.

When the busbar 1 is inserted and disposed between the engaging surface portion 21 and the close contact portion 22, the rack gear 24 protruding downward as shown in FIG. 7 is disposed on the busbar. It is pushed upward by (1), and as the rack gear 24 rises, the pinion gear 25 geared to both sides of the rack gear 24 rotates.

As the second wire 27 wound around the pinion gear 25 is released by the rotation of the pinion gear 25, the close contact portion 22 is connected to the bus bar by the elastic restoring force of the torsion spring 26. It rotates in the direction (1) and comes into close contact with the outer peripheral surface of the busbar (1).

In this embodiment, the fastening member 20 may be fixed to the busbar 1 in the above state, or the fastening member 50 mentioned in the first embodiment may be additionally combined and fixed.

Meanwhile, the fastening detection sensor 30 can detect whether the fastening member 20 is coupled to the busbar 1 in various ways. In this embodiment, the fastening detection sensor 30 is connected to the rack. By detecting whether the gear 24 is raised or lowered, it is possible to detect whether the fastening member 20 is coupled to the busbar 1.

Specifically, the fastening detection sensor 30 detects whether the rack gear 24 is raised or lowered.

When the rack gear 24 is pushed up by the busbar 1, the fastening detection sensor 30 detects that the fastening member 20 is coupled to the busbar 1, and the rack gear 24 ) falls, the fastening detection sensor 30 detects that the fastening member 20 is separated from the busbar 1.

At this time, the fastening member 20 may further include a first spring 28 that pushes the rack gear 24 downward.

When the rack gear 24 rises, the first spring 28 is compressed, and when the busbar 1 is separated, the rack gear 24 is automatically compressed by the elastic restoring force of the first spring 28. It goes down.

Through this, when the busbar 1 is separated from the fastening member 20, the rack gear 24 is lowered by the first spring 28, and the fastening detection sensor 30 is lowered. By detecting the rack gear 24, it is possible to detect that the fastening member 20 is separated or spaced from the busbar 1.

And, due to the lowering of the rack gear 24 by the first spring 28, the pinion gear 25 rotates in reverse and winds the second wire 27, which causes the second wire ( The close contact portion 22 connected to 27) rotates outward and opens to its original state.

Since other matters are similar to the first embodiment, detailed description thereof will be omitted.

The present inventor's system for detecting separation of a sensor housing and monitoring a switchboard using energy harvesting is not limited to the above-described embodiments, and can be implemented with various modifications within the scope of the technical spirit of the present invention.

1: busbar,
10: Sensor housing, 11: Temperature sensor unit, 12: Transmitter, 13: Self-generation module, 14: Earthquake detection sensor, 15: Humidity sensor,
20: fastening member, 21: coupling surface portion, 22: close contact portion, 23: first wire, 24: rack gear, 25: pinion gear, 26: torsion spring, 27: second wire, 28: first spring,
30: fastening detection sensor,
40: control unit, 42: receiver, 45: display,
50: Fixing member.

Claims (10)

A busbar disposed inside the switchboard; A sensor housing mounted on the busbar; a temperature sensor unit mounted on the sensor housing to measure the temperature of the busbar; a transmitter mounted on the sensor housing and wirelessly transmitting data measured by the temperature sensor unit; a self-generating module mounted on the sensor housing to generate electrical energy by collecting leakage magnetic fields around the busbar; a fastening member that couples the sensor housing to the busbar; a fastening detection sensor coupled to the sensor housing to detect whether the fastening member is coupled to the busbar; a receiver that wirelessly receives data transmitted from the transmitter; a display externally displaying the data received from the receiver and the live state of the busbar; It includes a control unit that controls the temperature sensor unit and the transmitter,
The fastening member is,
a coupling surface coupled to the sensor housing; a pair of close contact parts protruding from both sides of the coupling surface in the direction of the busbar and rotatably coupled to both sides of the coupling surface; A pair of first wires, one end of which is coupled to the coupling surface and the other end of which is coupled to the close contact, are disposed inside the coupling surface and inside the close contact,
In a state where the busbar is inserted and disposed between the coupling surface portion and the close contact portion, the ends of the close contact portion are fixed and coupled to each other by a fixing member to prevent the fastening member from being separated from the busbar,
When the busbar is inserted and disposed inside the coupling surface portion and the close contact portion, the first wire is bent while in contact with the outer peripheral surface of the busbar so that the close contact portion is rotated in the direction of the busbar and is in close contact,
The temperature sensor unit and transmitter operate with electrical energy generated by the self-generating module,
When the fastening detection sensor detects that the fastening member is coupled to the busbar, the control unit automatically operates the temperature sensor unit and the transmitter,
When the connection detection sensor detects that the connection member is separated or spaced from the busbar while the temperature sensor unit and the transmitter are operating, the control unit sends a separation signal of the connection member to the receiver through the transmitter. The display is a system for detecting separation of a sensor housing and monitoring a switchgear using energy harvesting, characterized in that the separation signal of the fastening member received through the receiver is externally displayed. In claim 1,
The engagement detection sensor protrudes from the sensor housing in the direction of the busbar,
When the fastening member is coupled to the busbar, the fastening detection sensor is turned on while in contact with the busbar and detects that the fastening member is coupled to the busbar. Detection of separation of the sensor housing and monitoring of the distribution board using energy harvesting. system. In claim 1,
It further includes an earthquake detection sensor mounted on the sensor housing,
When the fastening detection sensor detects that the fastening member is coupled to the busbar, the control unit operates the earthquake detection sensor. In claim 1,
A humidity sensor mounted on the sensor housing to measure humidity inside the switchboard,
When the measurement value measured by the humidity sensor exceeds a preset reference value, the control unit transmits a signal that there is excessive moisture inside the distribution board to the receiver through the transmitter. Sensor housing using energy harvesting Disconnection detection and distribution board monitoring system. In claim 1 or claim 2,
The fastening member is a system for detecting whether the sensor housing is separated and monitoring the distribution board using energy harvesting, characterized in that the fastening member is made of a band that penetrates the sensor housing. delete delete delete delete delete