KR102581728B1 - Switchboard with energy-harvesting module with leakage and over-temperature alarms - Google Patents

Abstract

The present invention relates to a switchboard equipped with an alarm type energy harvesting module to prevent electrical leakage and overheating, and includes a ZCT housing; An energy harvesting module housing in which a core bridge is formed to secure the separation distance between the ZCT core and the CT core; It is a flat plate with a metal thin film formed on the insulating layer, and is characterized by including a flat electrostatic sensor that is coupled to the lower surface of the core bridge and transmits case charging information of the switchgear to the control circuit unit.
According to the present invention, a switchgear equipped with a leakage and overheating prevention alarm type energy harvesting module is provided, which is modularized into a single device by combining ZCT, CT, energy harvesting technology, and technology for detecting the safety status of the switchboard or distribution board case. There is an advantage.

Description

Switchboard with energy-harvesting module with leakage and over-temperature alarms}

The present invention relates to a switchgear equipped with an energy harvesting module that prevents electrical leakage and overheating, and collects and stores the energy required for power consumption devices by combining a ZCT (Energy Zero Crossing Transducer) and a CT (Current Transformer) to charge the case. It concerns electrical technology that can promote user safety, including devices that sense status.

Both ZCT (Energy Zero Crossing Transducer) and CT (Current Transformer) are devices used to measure current.

ZCT generates a voltage signal when the current approaches 0V, that is, at the Zero Crossing point, and is also used as a voltage detector.

On the other hand, CT is used to measure current, and is a current transformer installed around the circuit where the current is measured, and is usually used in power meters, power monitoring systems, etc.

ZCT and CT are used as power metering devices, and can be used in combination with one or more energy storage devices, which can charge the energy storage devices and use the stored energy to drive power consumption devices, so they are mainly used as wireless sensors , It is used as an energy harvesting device used in fields such as smart grid and smart home.

In other words, by combining ZCT and CT to create an energy harvesting device, the energy required for power consumption devices can be collected and stored, thereby achieving energy savings and reduced power consumption.

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Energy harvesting devices using CT are technologies that can promote energy conservation and power efficiency, and the application fields of energy harvesting technology using this are becoming increasingly diverse and practical.

In this way, in order to effectively integrate energy harvesting devices using ZCT or CT or technology that detects the grounding status of a switchboard or distribution panel case, modularization technology that solves the difficulty of implementation must be supported.

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The present invention combines ZCT, CT, energy harvesting technology, and technology for detecting the safety status of a switchboard or distribution board case, modularizing it into a single device, and is equipped with a leakage and overheating prevention alarm type energy harvesting module that improves the difficulty of implementation. The purpose is to provide a receiving and distribution board.

In order to achieve the above object, the present invention is a switchgear, which is installed on an internal power line and is formed of a large ring housing portion in which a ZCT core into which a multi-phase or single-phase line is inserted is embedded and a support portion extending downward from the large ring housing portion. ZCT housing; A small ring housing portion containing a CT core into which one of the lines is inserted; a core bridge formed below the small ring housing and securing a separation distance between the ZCT core and the CT core; A temperature sensor formed on the core bridge to measure the temperature of the line passing through the small ring housing portion; An energy harvesting circuit formed inside the core bridge, which harvests the magnetic flux energy induced in the CT, and a temperature measurement circuit that measures the temperature sensor value with power obtained from the energy harvesting circuit unit and wirelessly transmits it to the outside. An energy harvesting module housing formed of a control circuit part formed, and a leg forming a space on the lower surface of the core bridge; A flat plate with a thin metal film formed on the insulating layer, and a flat electrostatic sensor that is inserted into the lower space of the core bridge formed by the legs and transmits case charging information of the switchgear to the control circuit unit. The technical point is a switchgear equipped with an overheating prevention alarm type energy harvesting module.

In the present invention, the control circuit unit includes a ground electrode grounded to the case of the switchgear through the lower surface of the core bridge; It is preferable that the switchboard is equipped with an energy harvesting module that prevents electrical leakage and overheating, and includes a charged electrode connected to the metal thin film.

In addition, the control circuit unit measures the amount of current flowing in the line through the CT, and when the current flowing in the line is 0, it checks the case charging information of the switchboard and wirelessly outputs the case safety status information of the switchboard. and an overheating prevention alarm type energy harvesting module.

According to the present invention described above, a leakage and overheating prevention alarm type energy harvesting module that improves the difficulty of implementation by combining ZCT, CT, energy harvesting technology, and technology for detecting the safety status of the switchboard or distribution board case into a single device. There is an advantage in that a switchboard equipped with a is provided.

1 is a wiring circuit diagram of a low-voltage switchboard of the present invention.
Figure 2 is a circuit diagram of the motor control panel wiring of the present invention.
Figure 3 is a high-voltage switchboard wiring circuit diagram of the present invention.
Figure 4 is a cross-sectional structural diagram of the energy harvesting housing portion of the present invention.
Figure 5 is a perspective view of the lower part of the energy harvesting housing of the present invention.
Figure 6 is an overall top perspective view of the present invention
Figure 7 is a perspective view of the upper part of the energy harvesting housing of the present invention

The present invention will be reviewed below with reference to the drawings. In describing the present invention, if it is determined that a detailed description of related known technology or configuration may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. will be.

In addition, the terms described below are terms defined in consideration of the functions in the present invention, and may vary depending on the intention or custom of the user or operator, so the definitions should be made based on the content throughout the specification explaining the present invention.

Figure 1 below is a wiring circuit diagram of a low-voltage switchboard of the present invention, Figure 2 is a wiring circuit diagram of a motor control panel of the present invention, Figure 3 is a wiring circuit diagram of a high-voltage switchgear of the present invention, and Figure 4 is a cross-section of the energy harvesting housing portion of the present invention. It is a structural diagram, Figure 5 is a lower perspective view of the energy harvesting housing of the present invention, Figure 6 is an overall upper perspective view of the present invention, and Figure 7 is a perspective view of the upper energy harvesting housing of the present invention.

As shown in the drawing, the present invention relates to a device that is coupled to the inside of a case of a switchgear and can monitor the electrostatic charging state of the case. The ZCT housing is largely formed of a large ring housing part 11 and a support part 12 ( 10); An energy harvesting housing (20) in which a small ring housing portion (21) and a core bridge (22) are formed; An electrostatic sensor 40 formed with an insulating layer 42 and a metal thin film 41; and a control circuit unit 30.

The ZCT housing 10 and the energy harvesting housing 20 form a ZCT core module with an energy harvesting circuit parallel as shown in FIGS. 6 and 7.

The ZCT housing 10 of the present invention is a part of the ZCT device where the ZCT core through which a multi-phase or single-phase line passes is installed, and is divided into a large ring housing part 11 and a support part 12, and the large ring housing part 11 ) is an insulated casing part in which a ZCT core made of a ring-shaped iron core into which a multi-phase or single-phase line is inserted is embedded.

In the present invention, the large ring housing part 11 is supported by a support part 12 with a fastening groove 13 formed at the bottom, and is fixed in the installation position with a screw fastened to the fastening groove 13.

In the embodiment of FIG. 6, the fastening hole 13 is formed as a U-shaped groove in the wing formed below the support portion 12, but may be formed as a through hole, and when fastened through the fastening hole 13, the ZCT housing ( 10) is noteworthy in that the position is fixed at the fastening position.

As shown in FIG. 7, the core bridge 22 is a support portion formed below the small ring housing portion 21, and has a separation distance (a) between the large ring housing portion 11 and the small ring housing. It is formed so that the ZCT core and CT core are installed with a predetermined separation distance.

In this regard, an energy harvesting circuit part that harvests magnetic flux energy induced in the CT may be built inside the core bridge 22, and an electrode 24 may be formed on the outside.

At this time, when the ZCT core and the CT core are adjacent, physical changes occurring in the ZCT core affect the CT core, control circuit, and temperature sensor with noise such as eddy currents, increasing heat generation and reducing energy harvesting efficiency. Therefore, it is necessary to secure a separation distance that minimizes the influence between the ZCT core and the CT core.

The present invention ensures this separation distance with the length a of the core bridge 22.

The separation distance varies depending on the installation environment constant set for each installed device, the size of power, and noise.

In other words, the minimum separation distance required between the ZCT core and the CT core is affected by the installation environment, so even if the devices are installed in the same switchgear, there is a problem in that the minimum separation distance is not the same depending on the installation environment of the device.

In order to solve this problem, the present invention fixes the position of the ZCT housing 10 by screwing it into the fastening hole 13 formed at the bottom of the support, as shown in FIGS. 6 and 7, and the energy harvesting module housing (20) is screwed into the long hole 23 formed on the side of the core bridge 22 so that the position can be varied by the length L of the long hole, and then the ZCT core and the Allows additional adjustment of the separation distance between CT cores.

According to the present invention, there is an advantage in providing a device that can improve the output efficiency of the energy harvesting circuit part and optimally attenuate the noise response of the control circuit part by adjusting the separation distance.

As shown in Figure 7, the energy harvesting housing 20 is divided into a small ring housing part 21 and a core bridge 22, and the small ring housing part 21 has a built-in CT core and a small ring housing part 21. One of a single-phase or multi-phase line is inserted inside, forming an energy harvesting device including a circuit that obtains energy from a magnetic field induced in a coil wound around the CT core when a current flows through the line.

The core bridge 22 is also provided with a temperature sensor 35 that is in close contact with the line passing through the small ring housing portion 21 and measures the line temperature.

Accordingly, the control circuit unit 30 formed inside the core bridge 22 measures the temperature sensor value with an energy harvesting circuit that harvests the magnetic flux energy induced in the CT and the power obtained from the energy harvesting circuit unit. It is composed of a temperature measurement circuit that transmits the temperature wirelessly to the outside.

The control signal output from the control circuit unit 30 causes the status to be output through the wireless earth leakage alarm 300 installed in the switchboard as shown in FIGS. 1 to 3.

Therefore, according to the present invention, the measured value of the temperature sensor 35 can output the temperature measurement value even when the power to the switchboard is cut off, so the internal safety status before opening the switchboard due to an accident, etc. is output through the wireless earth leakage alarm. Let it happen.

The core bridge 22 is coupled to the inner bottom of the case 50 of the switchboard while securing the separation distance between the ZCT core and the CT core.

At this time, an insulating layer 42 is formed on the lower surface of the core bridge 22 in a portion that contacts the case 50 of the distribution board, and a flat metal electrostatic sensor is formed on the upper side of the insulating layer 42. (40) are combined.

To this end, in the present invention, as shown in FIGS. 4 and 5, a leg 25 is formed on the bottom of the core bridge 22 to secure the installation space t of the flat electrostatic sensor 40 by separating it from the floor. The space for combining the flat electrostatic sensor 40 is secured.

The flat electrostatic sensor 40 can be easily formed using a PCB board on which a metal thin film is formed, and a coupling slot for fixing the flat electrostatic sensor 40 to the bottom of the core bridge 22 is provided on the leg. You can consider forming them together.

The flat electrostatic sensor 40 combined as described above is inserted into the space below the core bridge 22 as shown in FIG. 4 to obtain case charging information of the switchboard and transmit it to the control circuit unit 30.

Therefore, the control circuit unit 30 further includes a circuit that obtains charging information of the metal thin film 41, calculates and outputs charging information on the case of the switchboard.

In addition, an electrode 24 connected to the control circuit 30 is formed outside the core bridge 22 to transmit the charging signal of the metal thin film 41 to the outside.

The control circuit unit 30 may be configured to include an energy harvesting circuit that harvests the magnetic flux energy induced in the CT, but is not necessarily limited thereto, and is connected to the outside of the core bridge 22 through the electrode 24. It is also possible to form an energy harvesting circuit and transfer energy.

In order to properly detect the charging signal of the metal thin film 41 in the control circuit unit 30, as shown in FIG. 4, a ground electrode 31 is connected to the case 50 of the switchgear through the bottom of the core bridge 22. ) and a charged electrode 32 connected to the metal thin film 41.

By the ground electrode 24, the control circuit unit 30 ensures circuit grounding and at the same time can detect charging information of the metal thin film 41 through the charging electrode 32.

As shown in FIG. 4, it may be considered to form a through hole 43 in the electrostatic sensor 40 to connect the ground electrode, but it is not necessarily limited to this and may be grounded along another ground path. .

As described above, the present invention provides a device that can obtain charging information on the case 50 of a switchboard or distribution board from a device that modularizes the ZCT and energy harvesting device, and calculates and outputs a safety status signal to the user.

The safety status signal is generated in the control circuit unit, measures the amount of current flowing in the line through the CT, and when the current flowing in the line is 0, the case charging information of the switchboard is checked to calculate the case safety status information of the switchboard and wirelessly transmitted. It can be output, and it can be output externally through the wireless earth leakage alarm 300 installed in the switchboard as shown in FIGS. 1 to 3.

As described above, the present invention has the advantage of being easily applied to switchboards by modularizing the ZCT, energy harvesting device, temperature sensor, and electrostatic sensor into one device.

In addition, as shown in FIG. 3, ZCT is generally not applied to high-voltage switchboards, but if a module formed separately from the ZCT housing 10 and the energy harvesting module housing 20 is used as in the present invention, it can also be used in high-voltage switchboards. As shown in Figure 3, there is an advantage of performing an alarm function to prevent electrical leakage and overheating by installing only the energy harvesting module housing 20.

The above description is merely an illustrative explanation of the technical idea of the present invention, and various modifications and variations will be possible to those skilled in the art without departing from the essential characteristics of the present invention.

Therefore, the present invention is not limited to the above-described embodiments, and as claimed in the following claims, anyone skilled in the art can make various changes without departing from the gist of the invention. It will be said that the technical spirit of the present invention exists to the extent possible.

10: ZCT housing
11: Large ring housing part
12: support part
20: Energy harvesting housing
21: Small ring housing part
22: core bridge
24: electrode
30: control circuit part
31: ground electrode
32: charged electrode
35: Temperature sensor
40: electrostatic sensor
41: metal thin film
42: insulation layer
50: Case of switchboard

Claims (3)

In the distribution board,
It is installed on the internal power line.
A ZCT housing formed of a large ring housing portion in which a ZCT core into which a multi-phase or single-phase line is inserted is embedded, and a support portion extending downward from the large ring housing portion;
A small ring housing portion containing a CT core into which one of the lines is inserted; a core bridge formed below the small ring housing and securing a separation distance between the ZCT core and the CT core; A temperature sensor formed on the core bridge to measure the temperature of the line passing through the small ring housing portion; An energy harvesting circuit formed inside the core bridge, which harvests the magnetic flux energy induced in the CT, and a temperature measurement circuit that measures the temperature sensor value with power obtained from the energy harvesting circuit unit and wirelessly transmits it to the outside. It consists of an energy harvesting module housing formed of a control circuit part formed,
Legs forming a space on the lower surface of the core bridge;
A flat plate-type electrostatic sensor, which is a flat plate with a metal thin film formed on the insulating layer, is inserted into the space below the core bridge formed by the legs and transmits case charging information of the switchgear to the control circuit unit;
A switchboard equipped with a short circuit and overheating prevention alarm type energy harvesting module.
The method of claim 1, wherein the control circuit unit includes
a ground electrode grounded to the case of the switchgear through the lower surface of the core bridge; A switchgear equipped with an alarm type energy harvesting module to prevent leakage and overheating, comprising: a charged electrode connected to the metal thin film.
The method of claim 1, wherein the control circuit unit includes
Measure the amount of current flowing in the line through the CT,
A switchgear equipped with a short circuit and overheating prevention alarm type energy harvesting module, characterized in that when the current flowing in the line is 0, the case charging information of the switchboard is inspected and the case safety status information of the switchboard is wirelessly output.