Split-type measuring device

Abstract

To provide a split-type measuring device that can overcome the limitations of existing measurement accuracy. [Solution] A split-type measuring device comprising a first annular core consisting of a first upper core and a first lower core, which forms a magnetic closed circuit around a first power line, and a second annular core consisting of a second upper core and a second lower core, which forms a magnetic closed circuit around a second power line, and an upper module including an upper housing that accommodates the first upper core and the second upper core, and a lower module including a lower housing that accommodates the first lower core and the second lower core, which measures the current of the first power line using the first annular core and measures the current of the second power line using the second annular core, wherein a pair of first contact regions where the first upper core and the first lower core are in contact with each other, and a pair of second contact regions where the second upper core and the second lower core are in contact with each other are arranged to be separated from each other in the extension direction, which is the direction in which the first power line and the second power line are extended.

Description

Technical Field

[0001] The present invention relates to a split-type measuring device having a current measuring function, and further relates to a measuring device having a detachable temperature measuring module.

Background Art

[0002] In power measurement in switchboards and distribution boards, it was common to measure only the incoming end. Recently, however, the demand for branch circuit measurement has been increasing for precise management of the power system.

[0003] For such measurement, generally, a CT (Current Transformer) is installed for each branch circuit, and signal lines are connected from each CT to a central measuring device for measurement. However, the wiring complexity increases, and it is difficult to individually calibrate the CT modules, and there is a limit to improving the accuracy.

[0004] To overcome such limitations, it has evolved into a form in which a voltage measurement module for measuring voltage and a current measurement module for measuring current are separated, the voltage data measured by the voltage measurement module is transmitted to the current measurement modules provided in each branch circuit, and each current measurement module calculates power and the like using the transmitted voltage data.

[0005] As a current measurement module for measuring current, the split type is easy to manufacture panels and enables live work during alternation of power lines, so there are many demands from the field. According to the research of the present inventor, it has been found that the existing split-type current measurement modules have limitations in improving accuracy.

[0006] FIG. 1 is a conceptual diagram showing an example in which an existing split-type current measurement module is applied.

[0007] In each current measuring device 1, three busbars 3, which are connected to an MCCB (Molded Case Circuit Breaker) 2, pass through, and an annular core is placed around each busbar 3 for current measurement.

[0008] In the split-type current measuring device 1, the upper core and the lower core are in contact to form a closed loop, but the upper core and the lower core are in mutual contact in the contact area 1a. Because there is not much clearance space between the busbars, the cores become adjacent to each other, and in order to ensure a certain level of core cross-sectional size, the cores take on a shape that is longer in the longitudinal direction of the busbars.

[0009] In the Split Type current measuring device 1, this existing configuration was able to achieve a considerable level of measurement accuracy. However, according to the inventor's research, it became clear that when the contact areas 1a become adjacent to each other, there is a limit to the improvement of accuracy due to interference between adjacent cores. In a three-phase power line connected to the same MCCB, there is a distance d1 between the contact areas 1a of the cores for measuring adjacent power lines, and in a three-phase power line connected to different MCCBs, there is a distance d2 between the contact areas 1a of the cores for measuring adjacent power lines, and d1 and d2 are almost the same if the two MCCBs are configured adjacent to each other.

[0010] Because the upper and lower coils are in contact with each other, conventional split-type current measuring devices did not pose much of a problem in ensuring a reasonable level of accuracy. However, it was found that the proximity between the contact areas 1a becomes a problem when improving accuracy to ensure the highest level of precision. [Overview of the project] [Problems that the invention aims to solve]

[0011] This invention has been made in view of the problems of the prior art, and the object of this invention is to provide a split-type measuring device that can overcome the limitations of existing measurement accuracy.

[0012] Another object of the present invention is to provide a split-type measuring device with improved measurement accuracy.

[0013] Another object of the present invention is to provide a temperature measurement module and a split-type measurement device that enable easier temperature measurement. [Means for solving the problem]

[0014] A split-type measuring device according to one embodiment of the present invention comprises a first annular core consisting of a first upper core and a first lower core, forming a magnetic closed circuit around a first power line, and a second annular core consisting of a second upper core and a second lower core, wherein the device is capable of coupling and uncoupling between an upper module including an upper housing that accommodates the first upper core and the second upper core, and a lower module including a lower housing that accommodates the first lower core and the second lower core, and measures the current of the first power line using the first annular core and measures the current of the second power line using the second annular core.

[0015] The first annular core and the second annular core are arranged to be separated from each other in the extension direction, which is the direction in which the first power line and the second power line are extended.

[0016] The pair of first contact regions where the first upper core and the first lower core contact each other, and the pair of second contact regions where the second upper core and the second lower core contact each other, are arranged to be separated from each other in the extension direction, which is the direction in which the first power line and the second power line are extended.

[0017] In the split-type measuring device described above, the pair of first contact regions and the pair of second contact regions are rectangular in shape, but the width in the lateral direction perpendicular to the extension direction may be greater than 0.5 times the width in the extension direction and less than 2 times the width in the extension direction.

[0018] In the split-type measuring device described above, the width in the lateral direction may be the same as the width in the extension direction.

[0019] In the split-type measuring device described above, the separation distance L separated in the extension direction from the pair of first contact regions and the pair of second contact regions may be as large as 20 mm or more.

[0020] In the aforementioned split-type measuring device, the main body, to which the upper module and the lower module are connected, has protruding portions on both sides when viewed from above.

number

[0021] In the split-type measuring device described above, the main body to which the upper module and the lower module are joined has a protruding portion and a recessed portion continuously formed on the first side surface, and a protruding portion and a recessed portion continuously formed on the second side surface facing the first side surface, however, the recessed portion of the second side surface may be formed on the opposite side of the protruding portion of the first side surface, and the protruding portion of the second side surface may be formed on the opposite side of the recessed portion of the first side surface.

[0022] In the split-type measuring device described above, when the two main bodies are arranged adjacent to each other, the protruding portion of the second main body may be accommodated in the recessed portion of the first main body, and the protruding portion of the first main body may be accommodated in the recessed portion of the second main body.

[0023] In the split-type measuring device described above, with respect to a three-phase four-wire power line, the first main body can perform current measurement on two of the four power lines, and the second main body can perform current measurement on the remaining two of the four power lines.

[0024] In the split-type measuring device described above, a part of the first annular core can be located inside the protruding portion of the first side surface, and a part of the second annular core can be located inside the protruding portion of the second side surface.

[0025] In the split-type measuring device described above, by performing current measurement on two adjacent power lines of two pairs of single-phase power lines using the first annular core and the second annular core respectively, current measurement on the two pairs of single-phase power lines can be performed at once.

[0026] In the split-type measuring device described above, by performing current measurement on two adjacent power lines in a three-phase four-wire power line using the first annular core and the second annular core respectively, current measurement on a three-phase three-wire power line can be performed.

[0027] In the split-type measuring device described above, on the upper part of the lower housing, there may be formed a first cylindrical wall body standing upright in a square cylinder shape surrounding a first - 1 contact area close to the side surface among the pair of first contact areas, and a second cylindrical wall body standing upright in a square cylinder shape surrounding a second - 1 contact area close to the side surface among the pair of second contact areas.

[0028] In the split-type measuring device described above, on the upper part of the lower housing, there may be formed a third cylindrical wall body standing upright in a square cylinder shape surrounding a first - 2 contact area which is a contact area in the center among the pair of first contact areas and a second - 2 contact area which is a contact area in the center among the pair of second contact areas.

[0029] In the split-type measuring device described above, an insertion portion is provided at the lower part of the upper housing, which is inserted into and aligned with the third cylindrical wall and erected downwards. Inside the third cylindrical wall, a key piece is provided, which is erected perpendicular to the third cylindrical wall. The key piece is inserted into the key groove of the insertion portion to assist in the alignment between the upper module and the lower module.

[0030] In the split-type measuring device described above, the coupled upper housing and lower housing have a first line through-hole through which the first power line passes and a second line through-hole through which the second power line passes. The upper module is housed in the upper housing and may further include a first temperature sensor positioned above the first line through-hole to sense the temperature of the first power line, and a second temperature sensor housed in the upper housing and positioned above the second line through-hole to sense the temperature of the second power line.

[0031] The split-type measuring device described above may include a first temperature measuring module that is detachably coupled to the upper module on a first side surface of the upper module and senses the temperature of an adjacent power line that does not penetrate it, and a second temperature measuring module that is detachably coupled to the upper module on a second side surface opposite to the first side surface of the upper module and senses the temperature of an adjacent power line that does not penetrate it.

[0032] In the split-type measuring device described above, each of the first temperature measuring module and the second temperature measuring module may include a module connection pin that can be connected to the main body connection pin of the upper module, a temperature sensor that can slide laterally to move its position and sense the temperature of the power line downwards, and an FPCB interposed between the temperature sensor and the module connection pin to form a path for electrical signals.

[0033] The split-type measuring device described above may include a sliding module on which the temperature sensor is mounted and which has a window or lens on its lower surface that allows sensing light to pass through, and a guide case that guides the sliding of the sliding module.

[0034] In the split-type measuring device described above, the guide case is configured with a flange extending vertically from around the module connection pin, and the upper housing is configured with a trench around the main body connection pin that aligns with the flange, and the first temperature measuring module or the second temperature measuring module can be mounted by sliding the flange into the trench from bottom to top.

[0035] The split-type measuring device described above may include a plurality of microgrooves formed on the upper surface of the sliding module in the lateral direction, and a cantilever configured on the upper part of the guide case, extending in the lateral direction, with a projection formed at the lower part of its tip that attaches to one of the microgrooves.

[0036] In the split-type measuring device described above, multiple characters representing the MCCB standard are printed or engraved on the upper surface of the sliding module next to the multiple micro-grooves, and a viewing window is formed on the upper part of the guide case in which one of the multiple characters is exposed. [Effects of the Invention]

[0037] According to the split-type measuring device of the present invention, it is easy to arrange the core contact areas so that they are sufficiently spaced apart from each other, thereby minimizing interference between the contact areas and with the power line. This has the effect of further improving measurement accuracy compared to conventional split-type measuring devices. Therefore, it has the effect of overcoming the limitations of measurement accuracy that exist in existing split-type measuring devices.

[0038] According to the split-type measuring device of the present invention, it is possible to make the contact surface between the upper core and the lower core a square or a shape with a small difference in size between the width and height, which has the effect of further improving measurement accuracy compared to conventional split-type measuring devices.

[0039] According to the split-type measuring device of the present invention, the cylindrical walls formed on both sides of the power line ensure clearance between the power line and the contact area (core), providing perfect insulation and maximizing electrical safety.

[0040] According to the split-type measuring device of the present invention, protruding and recessed portions are formed on the lateral side surface, but each protruding portion is configured to align with the recessed portion on the opposite side, which has the effect of allowing multiple split-type measuring devices to be easily applied in close contact in the lateral direction.

[0041] According to the split-type measuring device and temperature measuring module of the present invention, since the user can configure the temperature measuring module in a detachable manner, it is possible to sense the temperature even for adjacent power lines that do not penetrate the main body, and even in applications where the temperature measuring module is removed and the main body is arranged in a continuous manner, it can be applied as the same main body.

[0042] According to the split-type measuring device and temperature measuring module of the present invention, the position of the temperature sensor extended from the main unit can be adjusted, which has the effect of being able to sense the temperature of the external power line in accordance with various standards of power line spacing (various standards of MCCBs).

[0043] The split-type measuring device and temperature measuring module of the present invention have the advantage of easily setting the position of the temperature sensor in accordance with the MCCB standard and easily aligning the temperature sensor so that it is precisely above the power line. [Brief explanation of the drawing]

[0044] [Figure 1] This is a conceptual diagram showing an example where an existing split-type current measurement module is applied. [Figure 2] This is an external perspective view showing a split-type measuring device according to one embodiment of the present invention. [Figure 3] This is an external perspective view showing a split-type measuring device according to one embodiment of the present invention. [Figure 4] This is an external perspective view showing the upper module, lower module, and temperature measurement module separated from each other. [Figure 5] This is an external perspective view showing the upper module, lower module, and temperature measurement module separated from each other. [Figure 6] This is an exploded perspective view showing the temperature measurement module and upper module in a split-type measuring device according to one embodiment of the present invention. [Figure 7] This is an exploded perspective view showing the temperature measurement module and upper module in a split-type measuring device according to one embodiment of the present invention. [Figure 8] This is an exploded perspective view showing the lower module of a split-type measuring device according to one embodiment of the present invention. [Figure 9] This is an exploded perspective view showing the lower module of a split-type measuring device according to one embodiment of the present invention. [Figure 10] This is a perspective view showing a temperature measurement module according to one embodiment of the present invention. [Figure 11] This is a perspective view showing a disassembled temperature measurement module according to one embodiment of the present invention. [Figure 12] This is a perspective view showing a disassembled temperature measurement module according to one embodiment of the present invention. [Figure 13] This diagram schematically shows a split-type measuring device according to one embodiment of the present invention. [Figure 14] This diagram schematically shows a split-type measuring device according to one embodiment of the present invention mounted on a three-phase three-wire power line. [Figure 15](a) A schematic diagram showing a split-type measuring device according to one embodiment of the present invention installed on two single-phase power lines. (b) A schematic diagram showing a split-type measuring device according to one embodiment of the present invention installed on a three-phase four-wire power line. [Figure 16] This diagram schematically shows a split-type measuring device according to one embodiment of the present invention, with a temperature measurement module attached to the main body. Figures 16(a) and 16(b) show different examples of installation on a three-phase three-wire power line, while Figure 16(c) shows an example of installation on two pairs of single-phase power lines. [Figure 17] This is a diagram showing the simulation status. [Figure 18] Figure 18 is a visual representation of the magnetic flux density (peak value) in adjacent core CTs, and is a diagram showing the arrangement (lateral separation) of Figure 17(a). [Figure 19] Figure 19 is a visual representation of the magnetic flux density (peak value) in adjacent core CTs, and is based on the arrangement (spacing in the extension direction) of Figure 17(b). [Figure 20] Figure 20 is a graph showing the crosstalk ratio for different separation distances between core CTs, and is a diagram of the arrangement (lateral separation) as in Figure 17(a). [Figure 21] This graph shows the crosstalk ratio for different separation distances between core CTs, and Figure 21 is a diagram based on the arrangement (extension direction separation) of Figure 17(b). [Figure 22] This diagram shows the simulation conditions implemented to investigate the separation distance at which crosstalk has minimal effect. [Figure 23] This table shows the output voltage and crosstalk ratio. [Modes for carrying out the invention]

[0045] Figures 2 and 3 are external perspective views showing a split-type measuring device according to one embodiment of the present invention. Figures 4 and 5 are external perspective views showing the upper module, lower module, and temperature measuring module separated from each other.

[0046] One embodiment of the split-type measuring device 10 is installed in a distribution board or switchboard for each branch circuit, and the central measuring device and each split-type measuring device 10 are connected by a data communication line. After receiving voltage data from the central measuring device, each device calculates a power value using the current value it has measured and transmits the calculated power value to the central measuring device.

[0047] A split-type measuring device 10 according to one embodiment of the present invention includes an upper module 100 and a lower module 200, as well as a first temperature measuring module 300 and a second temperature measuring module 400. As its name suggests, the split-type measuring device 10 according to one embodiment of the present invention allows the user to separate and combine the upper module 100 and the lower module 200. The upper module 100 and the lower module 200 constitute the main body 11 of the split-type measuring device.

[0048] The interconnected upper module 100 and lower module 200 are formed with a first line through-hole T1 through which a power line such as a busbar or electric wire passes, and a second line through-hole T2 through which another power line passes. The housing is formed with a first line through-hole T1 through which the first power line passes, and a second line through-hole T2 through which the second power line passes.

[0049] A split-type measuring device according to one embodiment of the present invention can be installed by having two power lines (busbars or wires) pass through it, attaching the lower module 200 to the panel of a distribution board or switchboard using bolts P2, P3 or pieces, then placing the power lines in the areas that will become the line penetration holes T1 and T2, and then connecting the upper module 100 onto the lower module 200 using bolts P1.

[0050] The line through-holes T1 and T2 are formed in the main body 11 in the direction in which the power line extends (hereinafter also referred to as the "extension direction") (X direction), and are composed of roughly rectangular prism-shaped open spaces in the extension direction. Although not exposed in the external appearance of the joined main body, as will be described later, a first annular core is arranged around the first line through-hole T1, and a second annular core is arranged around the second line through-hole T2. The main body 11 includes the first annular core, the second annular core, and a housing, etc.

[0051] In particular, there is a step on the side perpendicular to the extension direction (X direction) of the main body 11 and in the direction that crosses the two power lines (Y direction). The first side consists of the 1-1 side S11 and the 1-2 side S12, with a step between the 1-1 side S11 and the 1-2 side S12. The second side consists of the 2-1 side S21 and the 2-2 side S22, with a step between the 2-1 side S21 and the 2-2 side S22.

[0052] The first-second side surface S12 forms a recessed portion laterally to the first-second side surface S12 at a position that is recessed compared to the first-first side surface S11. The second-second side surface S22 forms a recessed portion laterally to the second-second side surface S22 at a position that is recessed compared to the second-first side surface S21.

[0053] When viewed upside down, the first-first side S11 protrudes beyond the first-second side S12, and the main body forms a protruding portion leading to the first-first side S11. The second-first side S21 protrudes beyond the second-second side S22, and forms a protruding portion leading to the second-first side S21. The first-second side S12 meets the first track penetration hole T1 and is cut in its middle section, and the second-second side S12 meets the second track penetration hole T2 and is cut in its middle section.

[0054] On the first and second sides, the recessed and protruding portions are perpendicular to the extension direction, and in the vertical direction (Z direction) where they extend upwards and downwards, they extend with the same profile.

[0055] Connectors 171 and 172 for power supply and transmission of communication signals are exposed on the upper surface of the upper module 100. A first temperature measurement module 300 may be mounted on the first side (specifically, the first-to-second side S12), and a second temperature measurement module 400 may be mounted on the second side (specifically, the second-to-second side S22).

[0056] The upper module 100 and the lower module 200 are essential components, but the first temperature measurement module 300 and the second temperature measurement module 400 may both be included, only one of them may be included, or neither may be included.

[0057] The temperature measurement modules 300 and 400 can be used for temperature measurement of adjacent power lines that do not penetrate the main body 11. When the temperature measurement modules are used, they are fitted into the main body (upper module) from below using a sliding mechanism and then fixed in place.

[0058] If the first temperature measurement module 300 is not configured, the first cover 510 is fitted onto the upper module 100 in a sliding manner, sealing the portion where the first temperature measurement module 300 is connected. If the second temperature measurement module 400 is not configured, the second cover 520 is fitted onto the upper module 100 in a sliding manner, sealing the portion where the second temperature measurement module 400 is connected.

[0059] The first temperature measurement module 300 is detachably connected to the upper module 100 on the first side of the main body 10 (specifically, the upper module 100) and senses the temperature of adjacent power lines that do not pass through it. The second temperature measurement module 400 is detachably connected to the upper module 100 on the second side opposite to the first side of the main body 10 (specifically, the upper module 100) and senses the temperature of other adjacent power lines that do not pass through it.

[0060] Figures 6 and 7 are exploded perspective views showing the temperature measurement module and upper module in a split-type measuring device according to one embodiment of the present invention. Figures 8 and 9 are exploded perspective views showing the lower module in a split-type measuring device according to one embodiment of the present invention.

[0061] The upper module 100 includes a first upper core 111, a second upper core 121, a first upper bobbin 112, a second upper bobbin 122, an upper PCB assembly 130, a first upper housing 140, a second upper housing 150, a first leaf spring 181, a second leaf spring 182, an upper cover 160, and a main PCB assembly 170.

[0062] The lower module 200 includes a first lower core 211, a second lower core 221, a first lower bobbin 212, a second lower bobbin 222, a first lower PCB assembly 240, a second lower PCB assembly 250, a first lower housing 260, and a second lower housing 270.

[0063] The housing of the main body 11 includes a first upper housing 140, a second upper housing 150, a first lower housing 260, and a second lower housing 270. The upper housing houses a first upper core and a second upper core, and includes the first upper housing 140 and the second upper housing 150. The lower housing houses a first lower core and a second lower core, and includes the first lower housing 260 and the second lower housing 270.

[0064] The first upper core 111 and the first lower core 211, which are in contact with each other, constitute a first annular core, which constitutes a magnetically closed circuit around the first power line that penetrates the first line through hole T1. The first upper core 111 and the first lower core 211 have a rectangular cross-section, which is extended so that the rectangular cross-section forms a closed loop. The first annular core is aligned such that its central through-hole eventually coincides with the first line through-hole T1.

[0065] When the upper module 100 and the lower module 200 are joined together, the first upper core 111 and the first lower core 211 come into contact with each other, forming a pair of rectangular first contact regions.

[0066] One of the first contact regions is the region where one end of the first upper core 111 and one end of the first lower core 211 are in contact, and the other of the first contact regions is the region where the other end of the first upper core 111 and the other end of the first lower core 211 are in contact.

[0067] The first upper bobbin 112 surrounds the first upper core 111 at its upper part and provides a frame on which the first upper coil (not shown) can be wound and provides insulation from the first upper coil. The first lower bobbin 212 surrounds the first lower core 211 at its lower part and provides a frame on which the first lower coil (not shown) can be wound and provides insulation from the first lower coil.

[0068] The second upper core 121 and the second lower core 221, which are in contact with each other, form a second annular core, which forms a magnetically closed circuit around the second power line that penetrates the second line through hole T2. The second upper core 121 and the second lower core 221 have a rectangular cross-section, which is extended so that the rectangular cross-section forms a closed loop. The second annular core is aligned so that its central through-hole eventually coincides with the second line through-hole T2.

[0069] When the upper module 100 and the lower module 200 are joined together, the second upper core 121 and the second lower core 221 come into contact with each other, forming a rectangular second contact area.

[0070] One of the second contact regions is the region where one end of the second upper core 121 and one end of the second lower core 221 are in contact, and the other of the second contact regions is the region where the other end of the second upper core 121 and the other end of the second lower core 221 are in contact.

[0071] The second upper bobbin 122 surrounds the second upper core 121 at its upper part and provides a frame on which the second upper coil (not shown) can be wound and provides insulation from the second upper coil. The second lower bobbin 222 surrounds the second lower core 221 at its lower part and provides a frame on which the second lower coil (not shown) can be wound and provides insulation from the second lower coil.

[0072] The first leaf spring 181 has a plate-shaped central portion 181a around which wing portions 181b and 181c descend downward from both sides, and is positioned above the first upper bobbin 112. By pressing the first upper bobbin 112 downward, it aims to create a tight seal between the first upper core and the first lower core. The second leaf spring 182 has a plate-shaped central portion 182a around which wing portions 182b and 182c descend downward from both sides, and is positioned above the second upper bobbin 122. By pressing the second upper bobbin 122 downward, it aims to create a tight seal between the second upper core and the second lower core.

[0073] The upper housing consists of a first upper housing 140 and a second upper housing 150, and houses various components that make up the upper module 100, with the first upper core 111, the second upper core 121, the first upper bobbin 112, the second upper bobbin 122, the first leaf spring 181, the second leaf spring 182, and the upper PCB assembly 130 housed in the internal space of both.

[0074] The first upper housing 140 has an outer contour

number

[0075] The second upper housing 150 has a first upper plug portion 153 and a second upper plug portion 154 that extend downward.

[0076] The first upper plug portion 153 includes a first plug block 153a, which has a roughly short rectangular prism-shaped outer shell; a first core through hole 153b, which is a rectangular prism-shaped space formed in the first plug block 153a through which the first upper core 111 passes; and a first pogo pin through hole 153c, which is a cylindrical space formed in the first plug block 153a through which the first upper pogo pin 133 passes.

[0077] The second upper plug portion 154 includes a second plug block 154a, which has a roughly short rectangular prism-shaped outer shell; a second core through hole 154b, which is a rectangular prism-shaped space formed in the second plug block 154a through which the second upper core 121 passes; and a second pogo pin through hole 154c, which is a cylindrical space formed in the second plug block 154a through which the second upper pogo pin 134 passes.

[0078] The first upper housing 140 forms a first upper space E1 that houses the first upper core 111, the second upper core 121, the first upper bobbin 112, the second upper bobbin 122, and the upper PCB assembly 130, centered around the housing partition wall 141, and a second upper space E2 that houses the upper PCB assembly 130.

[0079] The upper PCB assembly 130 is housed in the first upper space E1 and includes a PCB board 137, a first temperature sensor 131, a second temperature sensor 132, upper pogo pins 133, 134, body connection pins 135, 136, a first upper socket 139a, a second upper socket 139b, and connecting pins 138.

[0080] The upper pogo pins 133 and 134 are mounted from the bottom of the PCB board 137 and transmit signals to the first lower PCB assembly 240 and the second lower PCB assembly 250, respectively. The main body connection pins 135 and 136 are mounted on the top surface of the PCB board 137 and transmit signals to the first temperature measurement module 300 and the second temperature measurement module 400. The first upper socket 139a is connected to both ends of the first upper coil, and the second upper socket 139b is connected to both ends of the second upper coil. The connecting pin 138 transmits signals to the main PCB assembly 170.

[0081] The first temperature sensor 131 is housed in the housing (upper housing) and is positioned above (or below) the first line penetration hole T1 to sense the temperature of the first power line. The first temperature sensor 131 is mounted on the underside of the PCB substrate 137 and allows sensing light to pass through a window A formed in the second upper housing 150.

[0082] The first temperature sensor 131 measures the temperature of the first power line that penetrates the first line penetration hole T1 at the top of the first upper trench t1.

[0083] The second temperature sensor 132 is housed in the housing (upper housing) but is positioned above (or below) the second line penetration hole T2 to sense the temperature of the second power line. The second temperature sensor 132 is mounted on the underside of the PCB substrate 137 and allows sensing light to pass through a window formed in the second upper housing 150. The second temperature sensor 132 measures the temperature of the second power line passing through the second line penetration hole T2 at the top of the second upper trench t2.

[0084] A lens may be provided in window A, or between the temperature sensor and window A. The lens is used to focus the sensing light, narrowing the angle (range) that the temperature sensor senses, and accurately sensing only the power lines. A filter may be provided in window A, or between the temperature sensor and window A. The filter is used to allow a portion of the sensing light (e.g., the central portion) to pass through, narrowing the angle (range) that the temperature sensor senses, and accurately sensing only the power lines.

[0085] The temperature sensors 131 and 132 are non-contact temperature sensors, such as infrared temperature sensors.

[0086] The main PCB assembly 170 is housed in the second upper space E2 and includes the PCB 173, as well as the first connector 171, second connector 172, and third connector 174 mounted on the PCB 173. The upper cover 160 covers the exposed second upper space E2 of the first upper housing 140.

[0087] The first connector 171 and the second connector 172 may be used to transmit power and communication signals to the daisy-chain topology. The third connector 174 may be used to connect additional sensor modules, for example, to connect a ZCT module to a split-type measuring device (main unit).

[0088] Although the split-type measuring devices are divided into two types, they can be used separately as a main split-type measuring device and a sub-split-type measuring device. The main split-type measuring device can be connected in a daisy-chain topology using the first connector 171 and the second connector 172, and the sub-split-type measuring device can be connected to the main split-type measuring device using the third connector 174. For example, when measuring a three-phase four-wire power line as shown in Figure 15(b), one of the two split-type measuring devices can be used as a main split-type measuring device and the other as a sub-split-type measuring device.

[0089] The lower housing consists of a first lower housing 260 and a second lower housing 270, and houses the components that make up the lower module, specifically the first lower core 211, the second lower core 221, the first lower bobbin 212, the second lower bobbin 222, the first lower PCB assembly 240, and the second lower PCB assembly 250.

[0090] The second lower housing 270 has an outline that

number

[0091] The first lower PCB assembly 240 includes a PCB 241, a first lower socket 243 into which both ends of a first lower coil (not shown) are connected, and a first lower pogo pin 242 in contact with a first upper pogo pin. The second lower PCB assembly 250 includes a PCB 251, a second lower socket 253 into which both ends of a second lower coil (not shown) are connected, and a second lower pogo pin 252 in contact with a second upper pogo pin.

[0092] At the top of the lower housing (specifically, the first lower housing 260), a third cylindrical wall 262 is erected in a rectangular cylindrical shape, surrounding the first-to-second contact area, which is the central contact area of ​​a pair of first contact areas, and the second-to-second contact area, which is the central contact area of ​​a pair of second contact areas.

[0093] Inside the third cylindrical wall 262, there is a key piece D which is roughly triangular in shape and is erected perpendicular to the space between the third cylindrical wall and the floor. The key piece D is inserted into the keyway F of the insertion section 151 and helps to align the upper module 100 and the lower module 200.

[0094] The first cylindrical wall 261 is erected in a rectangular cylindrical shape, surrounding the 1-1 contact region, which is closer to the side of the pair of first contact regions, and the second cylindrical wall 264 is erected in a rectangular cylindrical shape, surrounding the 2-1 contact region, which is closer to the side of the pair of second contact regions.

[0095] The end of the first upper core 111 and the first upper plug 153 are housed inside the first cylindrical wall 261 from the open top, and the end of the second upper core 121 and the second upper plug 154 are housed inside the second cylindrical wall 264 from the open top.

[0096] The first cylindrical wall 261 completely surrounds the first contact area (specifically the 1-1 contact area), ensuring complete insulation and clearance from the first power line, and also ensuring complete insulation and clearance from other adjacent power lines, although it does not penetrate the split-type measuring device. The second cylindrical wall 264 completely surrounds the second contact area (specifically the 2-1 contact area), ensuring complete insulation and clearance from the second power line, and also ensuring complete insulation and clearance from other adjacent power lines, although it does not penetrate the split-type measuring device.

[0097] The third cylindrical wall 262 completely surrounds the first-to-second contact area and the second-to-second contact area, thereby ensuring complete insulation and clearance between the first power line and the second power line.

[0098] According to the split-type measuring device of the present invention, the cylindrical walls formed on both sides and in the center of the power line ensure clearance between the power line and the contact area (core), providing perfect insulation and maximizing electrical safety.

[0099] The lower part of the upper housing is configured with an insertion portion 151 that is inserted into and aligned with the third cylindrical wall. The insertion portion 151 is a plug shape that is erected downward between the first upper trench t1 and the second upper trench t2, but allows the first upper core and the second upper core to pass through. The side surface of the insertion portion 151 is provided with a keyway F into which a key piece D is inserted. The lateral depth of the keyway F narrows from bottom to top, corresponding to the narrowing of the triangular plate-shaped key piece D from bottom to top.

[0100] Figure 10 is a perspective view showing a temperature measurement module according to one embodiment of the present invention. Figures 11 and 12 are perspective views showing the temperature measurement module according to one embodiment of the present invention in an exploded view.

[0101] Since the structures of the first temperature measurement module 300 and the second temperature measurement module 400 are identical, only the "temperature measurement module 300" will be described below. The temperature measurement module 300 includes a temperature sensor module 310, connecting means 320, 321, 322, sliding modules 330, 340, and guide cases 350, 360.

[0102] The temperature sensor module 310 has a temperature sensor 311 mounted on the underside of the PCB board 312, and the temperature sensor 311 faces downward through the window 343 of the sliding module. The temperature sensor module 310 (and temperature sensor 311), which is fixedly mounted on the sliding module, can slide laterally in the Y direction together with the sliding modules 330 and 340, allowing for relative positional movement between it and the main body 10 (upper module 100). The temperature sensor 311 faces downward to sense the temperature of the power line and is a non-contact type, such as an infrared temperature sensor.

[0103] The connecting means 320, 321, and 322 include the module connection pin 322 and the FPCB 321, etc., as means for electrically connecting the temperature sensor 311 and the main unit connection pins 135 and 136.

[0104] The FPCB321 interposes between the temperature sensor 311 and the module connection pin 322 to form an electrical signal path, and can be flexibly bent even when the temperature sensor 311 and sliding modules 330 and 340 move. The module connection pin 322 has multiple spring pins 322a on its side facing the main body 10, and transmits electrical signals by elastically connecting one-to-one with the spring pins configured on the main body connection pins 135 and 136.

[0105] The sliding modules 330 and 340 are equipped with a temperature sensor 311 and have a window 343 on their underside that allows sensing light to pass through. A lens may be provided in the window 343 or between the window 343 and the temperature sensor 311. The lens is used to focus the sensing light and narrow the angle (range) that the temperature sensor 311 senses, thereby accurately sensing only the power lines. The sliding module is provided with a first guide projection 342 that points downward from its bottom and a second guide projection 332 that points upward from its top. A gripping projection 341 is formed at the end of the sliding module to make it easier for the user to hold.

[0106] Guide cases 350 and 360 guide the sliding of the sliding module and include an upper guide case 350 and a lower guide case 360. The sliding module is mounted between the upper guide case 350 and the lower guide case 360 ​​and is configured to slide laterally (in the Y direction).

[0107] The second guide projection 332 of the sliding module is secured to the second guide groove 352 that penetrates the upper surface of the upper guide case 350, allowing the sliding module to move in a straight line within a defined range, and the first guide projection 342 of the sliding module is secured to the first guide groove 362 that penetrates the lower surface of the lower guide case 360, allowing the sliding module to move in a straight line within a defined range.

[0108] Guide cases 350 and 360 are configured with flanges (303:353 and 363) that extend vertically from around the module connection pin 322. Flange 303 has the same thickness, extends vertically (Z direction) and contacts the flange, and has a groove on its inside that extends vertically (Z direction).

[0109] Furthermore, around the main unit connection pins 135 and 136, trenches 143a and 143b are formed in the upper housing 100 of the main unit 10 that are aligned with flanges (303, 353 and 363). The lower ends of the trenches 143a and 143b are open at the entrance, and the upper ends are closed. Therefore, the temperature measurement module can be mounted by sliding the flange 303 into the trench from below, starting from the lower end of the open trench 143a and 143b. A hook 354 is provided on the upper part of the main unit side of the upper case 350. When the flanges 353 and 363 are fully fitted into the trench, the hook 354 is secured to the hook grooves 144a and 144b of the upper housing 140, thereby preventing the temperature sensor module from detaching downwards.

[0110] If the temperature measurement modules 300 and 400 are not configured, the cover can be attached by sliding the cover flanges 510a and 520a into the trenches from the bottom end of the open trenches 143a and 143b (see Figures 4 and 5). The cover is provided with cover hooks 510b and 520b, and when the cover flanges 510a and 520a are fully fitted into the trenches, the cover hooks 510b and 520b are secured to the hook grooves 144a and 144b of the upper housing 140, thereby preventing the cover from detaching downwards.

[0111] Micro-grooves 331 are formed on the upper surface of the sliding module, with multiple grooves formed in the lateral direction (Y direction). Multiple letters representing the MCCB standard are printed or engraved next to the multiple micro-grooves 331 on the upper surface of the sliding module, with the same number of letters as the number of micro-grooves 331. For example, the letters are engraved as 60A, 125A, and 250A, respectively.

[0112] Furthermore, a cantilever 351 is formed on the upper part of the guide case, but the cantilever 351 is also extended in the lateral direction (Y direction), and a projection 351a is formed on the lower part of its tip, which is fixed into one of the micro grooves 331. When the user adjusts the position of the sliding module, the projection 351a of the cantilever 351 is positioned into one of the micro grooves 331.

[0113] Furthermore, a confirmation window 356 is formed at the top of the guide case, in which one of several characters is exposed. For example, depending on the micro-groove 331 to which the projection 351a is attached, one of 60A, 125A, and 250A will be visible through the confirmation window 356.

[0114] According to one embodiment of the present invention, the temperature measurement module allows the position of the temperature sensor 311, which extends from the main body 10, to be adjusted, thereby enabling sensing of the power line temperature in accordance with various standards of power line spacing (various standards of MCCBs).

[0115] Furthermore, according to one embodiment of the present invention, the temperature measurement module has the advantage of easily setting the position of the temperature sensor 311 in accordance with the MCCB standard and easily aligning the temperature sensor 311 so that it is precisely above the power line.

[0116] Figure 13 is a schematic diagram showing a split-type measuring device according to one embodiment of the present invention. Figure 14 is a schematic diagram showing the split-type measuring device according to one embodiment of the present invention mounted on a three-phase three-wire power line. Figure 15(a) is a schematic diagram showing the split-type measuring device according to one embodiment of the present invention mounted on two single-phase power lines, and Figure 15(b) is a schematic diagram showing the split-type measuring device according to one embodiment of the present invention mounted on a three-phase four-wire power line.

[0117] The split-type measuring device 10 measures the current of the first power line (4A in Figure 14(a), 4B in Figure 14(b)) using the first annular core consisting of the first upper core 111 and the first lower core 211, and measures the current of the second power line (4B in Figure 14(a), 4C in Figure 14(b)) using the second annular core consisting of the second upper core 122 and the second lower core 221.

[0118] The first upper core 111 and the first lower core 211 are in contact with each other, forming a pair of first contact regions 11a and 11b, and the second upper core 122 and the second lower core 221 are in contact with each other, forming a pair of second contact regions 12a and 12b, which are arranged to be separated from each other in the extension direction (X direction), which is the direction in which the first power line and the second power line are extended.

[0119] A pair of first contact regions 11a, 11b include a 1-1 contact region 11a near the first side surface and a 1-2 contact region 11b inside it (i.e., in the center), and a pair of first contact regions formed on the same annular core are naturally located in the same position in the extension direction (X direction). A pair of second contact regions 12a, 12b include a 2-1 contact region 12a near the second side surface and a 2-2 contact region 12b inside it (i.e., in the center), and a pair of second contact regions formed on the same annular core are naturally located in the same position in the extension direction (X direction).

[0120] Furthermore, preferably, the first-to-second contact area 11b and the second-to-second contact area 12b are located in the same position in the lateral direction (Y direction). As can be seen with reference to Figure 7, the fact that the first-to-second contact area 11b and the second-to-second contact area 12b are located in the same position in the lateral direction (Y direction) simplifies the design of the insertion section 151 and optimizes the lateral width of the device.

[0121] As shown in Figure 13, the first contact region and the second contact region are sufficiently separated by a distance L in the extension direction, and such a separated arrangement can be easily realized with the split-type measuring device of the present invention.

[0122] In a split-type measuring device according to one embodiment of the present invention, the first annular core and the second annular core are arranged to be spaced apart from each other in the extension direction (X direction), which is the direction in which the first power line and the second power line are extended.

[0123] As shown in Figure 1, according to the existing split-type measuring device, the three annular cores are not separated at all in the extension direction (X direction) and are located at the same position in the extension direction (X direction).

[0124] According to the split-type measuring device of the present invention, it is easy to arrange the core contact areas so that they are sufficiently separated from each other and not adjacent to one another. This minimizes interference between contact areas and with power lines, resulting in improved measurement accuracy compared to conventional split-type measuring devices. Therefore, it has the effect of overcoming the limitations of measurement accuracy of existing split-type measuring devices.

[0125] According to the split-type measuring device of the present invention, the pair of first contact regions 11a, 11b and the pair of second contact regions 12a, 12b are rectangular in shape, but the width W1 in the lateral direction perpendicular to the extension direction is preferably greater than 0.5 times the width W2 in the extension direction and less than twice the width in the extension direction, and more preferably the width W1 in the lateral direction is the same as the width W2 in the extension direction.

[0126] In a split-type measuring device according to one embodiment of the present invention, the separation distance L between a pair of first contact regions and a pair of second contact regions in the extension direction is made 3.4 times or more larger than the width W1 in the lateral direction perpendicular to the extension direction between the first contact regions and the second contact regions.

[0127] Figure 17 is a diagram showing the simulation situation, where Figure 17(a) shows two cores (and therefore CTs) separated laterally, similar to the prior art, and Figure 17(b) shows two core CTs separated in the longitudinal direction, as in an embodiment of the present invention.

[0128] The current flowing through the power line (busbar) is 60A, the lateral separation distance between cores (and therefore the separation distance between contact areas) M1 in Figure 17(a) is 5mm, the longitudinal separation distance between cores (and therefore the separation distance between contact areas) M2 in Figure 17(b) is 5mm, the cross-sectional size of the core and contact area is 6×6mm, the core height H1 is 51.3mm, the core width H2 is 31.0mm, the winding turn count is 1500 turns, and the winding diameter is 0.16mm.

[0129] Figures 18 and 19 visually show the magnetic flux density (peak value) in adjacent core CTs. Figure 18 is based on the arrangement shown in Figure 17(a) (lateral separation), and Figure 19 is based on the arrangement shown in Figure 17(b) (extensional separation).

[0130] Figures 20 and 21 are graphs showing the crosstalk ratio for different separation distances between core CTs. Figure 20 is based on the arrangement shown in Figure 17(a) (lateral separation), and Figure 21 is based on the arrangement shown in Figure 17(b) (extensional separation).

[0131] For the same spacing between cores, the crosstalk ratio is lower when the two cores are positioned longitudinally (front-to-back) than when they are positioned laterally. For all spacings, including 5mm, 10mm, 20mm, 30mm, and 40mm, the longitudinal arrangement is far superior to the lateral arrangement in terms of crosstalk ratio. The crosstalk ratio is lower when two CTs are positioned longitudinally than when they are positioned laterally, at the same spacing between CTs. When two CTs are positioned longitudinally (front-to-back) relative to each other, the crosstalk ratio becomes very low, between approximately 0.165% and 0.17%, when the spacing between CTs is 20mm or more.

[0132] Figure 22 is a diagram showing the simulation conditions performed to investigate the separation distance at which the effects of crosstalk are minimal. Figures 22(a) and 22(b) show a pair of core CTs arranged in the longitudinal direction, with the power line passing through the left core CT in Figure 22(a) and the power line passing through the right core CT in Figure 22(b). Figures 22(c) and 22(d) show diagrams with only one core CT, with Figure 22(c) showing the power line passing through the core CT and Figure 22(d) showing the simulation conditions where the power line is located in space without a core CT.

[0133] In the simulation, the current flowing through the power line (busbar) is 60A, and all other conditions are the same as those in Figure 17.

[0134] Figure 23 is a table showing the output voltage and crosstalk ratio, where the table in Figure 23(a) shows the output voltage and crosstalk ratio obtained from the configurations in Figures 22(a) and 22(b), and the table in Figure 23(b) shows the output voltage and crosstalk ratio obtained from the configurations in Figures 22(c) and 22(d).

[0135] When one CT is removed, the crosstalk ratio is 0.161%, which is a situation where there is no influence from adjacent CTs. Incidentally, when two CTs are separated, the ratio is 0.166%, and according to the simulation results in Figure 21, it is lower than 0.17% when the distance between them is 20 mm or more. If that is the case, then it can be considered that adjacent CTs are hardly affected by crosstalk when the distance between two CTs is 20 mm or more. When two cores are arranged in the longitudinal direction of each other, adjacent cores are hardly affected by crosstalk when the distance between the cores is 20 mm or more.

[0136] As shown in Figure 1, in conventional split-type measuring devices, the width of the contact area in the lateral direction (see W0 in Figure 1) is limited to a narrow range. This raises concerns that even a slight misalignment between the upper and lower cores when joining the upper and lower modules can cause a significant reduction in the contact area.

[0137] In conventional split-type measuring devices, two contact areas had to be placed within the same space (lateral spacing) between two power lines. However, with the split-type measuring device of the present invention, only one contact area needs to be placed within the same space, which allows for a significant increase in the lateral width of the contact area.

[0138] Therefore, the split-type measuring device of the present invention has the advantage that it is easy to increase the lateral width of the contact area, and even if the alignment between the upper core and the lower core is misaligned, the reduction in the area of ​​the contact area can be significantly reduced.

[0139] As shown in Figure 14, the split-type measuring device (main unit) of the present invention is applied to two adjacent power lines in a three-phase three-wire power line, and current measurement for the three-phase three-wire power line is performed by using the first annular core and the second annular core, respectively.

[0140] As a single split-type measuring device proposed in the present invention, it is possible to measure the current of a 3-phase MCCB (power line connected to a 3-phase MCCB). Since the sum of the currents of the three phases is zero even if one phase is not measured, one phase can be calculated using two phases, thus eliminating the need for hardware to measure the remaining phase. Depending on the ease of the MCCB configuration, the measurement method shown in Figure 14(a) or the measurement method shown in Figure 14(b) can be selected and configured.

[0141] As shown in Figure 15(a), current measurements for two pairs of single-phase power lines connected to two MCCBs can be performed simultaneously by using the first and second annular cores, respectively, included in a single split-type measuring device, to measure the current for two adjacent power lines.

[0142] In a continuous single-phase MCCB configuration with the same capacity, a single split-type measuring device can measure the current of one circuit (power line) of each MCCB, effectively covering two single-phase MCCBs and offering the advantage of lowering panel manufacturing costs.

[0143] As shown in Figure 15(b), when using the split-type measuring device of the present invention, the first unit 10A can measure the current for two of the four power lines in a three-phase four-wire MCCB and power line, while the second unit 10B can measure the current for the remaining two power lines.

[0144] In a three-phase four-wire system, the current of all four circuits (power lines) must be measured independently. Therefore, measuring devices used for three-phase three-wire systems cannot be used, and conventionally, products for measuring three-phase four-wire systems had to be manufactured and supplied separately. However, the split-type measuring device proposed in this invention utilizes the same split-type measuring device applied to single-phase and three-phase three-wire circuits, but has the advantage of being able to handle three-phase four-wire configurations as two separate split-type measuring devices.

[0145] The main body 10, formed by the joining of the upper and lower modules, has protruding and recessed portions on both sides (lateral direction) when viewed from above.

number

[0146] Furthermore, as shown in the example in Figure 15(b), when the two main bodies 10A and 10B are arranged adjacent to each other, the protruding portion of the second main body is accommodated in the recessed portion of the first main body, and the protruding portion of the first main body is accommodated in the recessed portion of the second main body. Then, a part of the first annular core is located inside the protruding portion P1 of the first side surface, and a part of the second annular core is located inside the protruding portion P2 of the second side surface.

[0147] According to the split-type measuring device of the present invention, protruding and recessed portions are formed on the lateral side surface. However, each protruding portion is configured to align with the recessed portion on the opposite side. This has the effect of easily applying a large number of split-type measuring devices, such as when applying to a three-phase four-wire system or when multiple split-type measuring devices must be arranged consecutively.

[0148] Figure 16 is a schematic diagram showing a split-type measuring device according to one embodiment of the present invention, with a temperature measurement module attached to the main body. Figures 16(a) and 16(b) show different examples of installation on a three-phase three-wire power line, and Figure 16(c) shows an example of installation on two pairs of single-phase power lines.

[0149] A first temperature measurement module 300 may be attached (connected) to the first side of the main body 10, and a second temperature measurement module 400 may be attached (connected) to the second side.

[0150] As shown in Figure 16(a), for three-phase power lines that do not penetrate the main body 10, the temperature can be sensed using the temperature sensor 411 of the temperature measurement module 400, which is separately attached to the second side surface of power line 4C, or as shown in Figure 16(b), for three-phase power lines that do not penetrate the main body 10, the temperature can be sensed using the temperature sensor 311 of the temperature measurement module 300, which is separately attached to the first side surface of power line 4A.

[0151] As shown in Figure 16(c), of the two outer power lines that do not penetrate the main body 10 among the two pairs of single-phase power lines, the temperature of power line 5A is sensed using the temperature sensor 311 of the temperature measurement module 300 mounted on the first side, and the temperature of power line 5D is sensed using the temperature sensor 411 of the temperature measurement module 400 mounted on the second side.

[0152] According to one embodiment of the split-type measuring device, the user can configure a temperature measurement module in a detachable manner, so that temperature can be sensed even for adjacent power lines that do not penetrate the main body. In applications such as Figure 15(b), the temperature measurement module can be removed and the main body can be arranged in a continuous manner, and the same main body can be used in such applications. [Explanation of symbols]

[0153] 10: Split-type measuring device 100: Upper module 111: First upper core 121: Second upper core 112: First upper bobbin 122: Second upper bobbin 130: Upper PCB assembly 140: First upper housing 150: Second upper housing 160: Upper cover 170: Main PCB assembly 181: First leaf spring 182: Second leaf spring 200: Lower module 211: First lower core 221: Second lower core 212: First lower bobbin 222: Second lower bobbin 240: First lower PCB assembly 250: Second lower PCB assembly 260: First lower housing 270: Second lower housing 300, 400: Temperature measurement module; 310: Temperature sensor module 321, 322: Connecting means; 330, 340: Sliding modules 350, 360: Guide Case

Claims

1. The device comprises an upper module and a lower module, wherein the upper module and the lower module are connectable and detachable, and in the region where the upper module and the lower module are connected, a first line through-hole and a second line through-hole are formed, sandwiched between the upper module and the lower module and extending parallel to each other and apart from each other. A first annular core that vertically surrounds the first line through-hole, forming a magnetic closed circuit around the first power line passing through the first line through-hole, comprising a first upper core and a first lower core; and a second annular core that vertically surrounds the second line through-hole, forming a magnetic closed circuit around the second power line passing through the second line through-hole, comprising a second upper core and a second lower core. The upper module includes an upper housing that houses the first upper core and the second upper core, and the lower module includes a lower housing that houses the first lower core and the second lower core. A split-type measuring device that measures the current of the first power line using the first annular core and measures the current of the second power line using the second annular core, The first annular core and the second annular core are arranged to be separated from each other in the extension direction, which is the direction in which the first and second line through holes extend. Split-type measuring device.

2. The device comprises an upper module and a lower module, wherein the upper module and the lower module are connectable and detachable, and in the region where the upper module and the lower module are connected, a first line through-hole and a second line through-hole are formed, sandwiched between the upper module and the lower module and extending parallel to each other and apart from each other. A first annular core that vertically surrounds the first line through-hole, forming a magnetic closed circuit around the first power line passing through the first line through-hole, comprising a first upper core and a first lower core; and a second annular core that vertically surrounds the second line through-hole, forming a magnetic closed circuit around the second power line passing through the second line through-hole, comprising a second upper core and a second lower core. The upper module includes an upper housing that houses the first upper core and the second upper core, and the lower module includes a lower housing that houses the first lower core and the second lower core. A split-type measuring device that measures the current of the first power line using the first annular core and measures the current of the second power line using the second annular core, The first upper core and the first lower core are in contact with each other, and the second upper core and the second lower core are in contact with each other, and the pair of first contact regions are in contact with each other, and are arranged to be separated from each other in the extension direction, which is the direction in which the first and second line through holes are extended. Split-type measuring device.

3. The pair of first contact regions and the pair of second contact regions are a pair of rectangular regions, and the width of the rectangular region in the lateral direction perpendicular to the extension direction is greater than 0.5 times the width of the rectangular region in the extension direction and less than 2 times the width of the rectangular region in the extension direction. The split-type measuring device according to claim 2.

4. The pair of first contact regions and the pair of second contact regions are a pair of rectangular regions, and the separation distance (L), which is the shortest distance in the extension direction between the side of the pair of first contact regions extending horizontally perpendicular to the extension direction and the side of the pair of second contact regions extending horizontally, is 20 mm or more. The split-type measuring device according to claim 2.

5. The main body formed by the joining of the upper module and the lower module is generally a rectangular parallelepiped, the top and bottom surfaces of the rectangular parallelepiped are in the extension direction and perpendicular to the extension direction and parallel to the lateral direction in which the first and second track through holes are separated, each of the four sides of the rectangular parallelepiped is parallel to either the extension direction or the lateral direction, and the two sides parallel to the extension direction have protruding portions from the rectangular parallelepiped, and the projection of the main body from the upper module side to the lower module side is [Math 1] Characterized by having the shape of, The split-type measuring device according to claim 1 or 2.

6. The main body formed by the joining of the upper module and the lower module is generally a rectangular parallelepiped, the upper and lower surfaces of the rectangular parallelepiped are perpendicular to the extension direction and parallel to the lateral direction in which the first and second track through-holes are separated, and each of the four sides of the rectangular parallelepiped is parallel to either the extension direction or the lateral direction. On a first side surface of the main body parallel to the extension direction, a protruding portion and a recessed portion are formed continuously in the extension direction, and on a second side surface facing the first side surface, a protruding portion and a recessed portion are formed continuously in the extension direction. A recessed portion of the second side surface is formed opposite to the protruding portion of the first side surface, and a protruding portion of the second side surface is formed opposite to the recessed portion of the first side surface. The split-type measuring device according to claim 1 or 2.

7. When the two aforementioned bodies are arranged adjacent to each other, The protruding portion of the second body is housed in the recessed portion of the first body, and the protruding portion of the first body is housed in the recessed portion of the second body. The split-type measuring device according to claim 6.

8. The lower housing is generally a rectangular parallelepiped, the upper and lower surfaces of the rectangular parallelepiped are perpendicular to the extension direction and parallel to the lateral direction in which the first and second line through holes are separated, and each of the four sides of the rectangular parallelepiped is parallel to either the extension direction or the lateral direction. The surface of the lower housing that connects with the upper housing includes the pair of first contact regions of the first lower core and the pair of second contact regions of the second lower core. The upper part of the lower housing having a surface that connects with the upper housing, A first cylindrical wall is erected in a rectangular cylindrical shape perpendicular to the surface that connects to the upper housing, surrounding the first-1 contact region, which is one of the two sides of the pair of first contact regions that are parallel to the extension direction and is closer to the side facing the first track penetration hole, A second cylindrical wall is erected in a rectangular shape perpendicular to the surface that connects to the upper housing, surrounding the second-first contact region, which is one of the two sides of the pair of second contact regions that are parallel to the extension direction and is closer to the side facing the second line through-hole, and connecting to the upper housing. The split-type measuring device according to claim 2.

9. The lower housing is generally a rectangular parallelepiped, the upper and lower surfaces of the rectangular parallelepiped are perpendicular to the extension direction and parallel to the lateral direction in which the first and second line through holes are separated, and each of the four sides of the rectangular parallelepiped is parallel to either the extension direction or the lateral direction. The surface of the lower housing that connects with the upper housing includes the pair of first contact regions of the first lower core and the pair of second contact regions of the second lower core. The upper part of the lower housing having a surface that connects with the upper housing, A third cylindrical wall is formed, erected in a rectangular cylindrical shape perpendicular to the surface that connects to the upper housing, surrounding the first-second contact region, which is one of the two sides of the pair of first contact regions that are parallel to the extension direction and is furthest from the side facing the first track through-hole, and the second-second contact region, which is one of the two sides of the pair of second contact regions that are furthest from the side facing the second track through-hole. The split-type measuring device according to claim 2.

10. The lower part of the upper housing that connects to the lower housing has an insertion portion that is inserted into and aligned with the third cylindrical wall and erected downwards. Inside the third cylindrical wall, a key piece is provided, which is erected perpendicular to the third cylindrical wall. The key piece is inserted into the key groove of the insertion part to facilitate alignment between the upper module and the lower module. The split-type measuring device according to claim 9.

11. The joined upper housing and lower housing have a first line through-hole and a second line through-hole formed therein. The aforementioned upper module is A first temperature sensor housed in the upper housing and positioned above the first power line penetration hole for sensing the temperature of the first power line, The upper housing further includes a second temperature sensor housed in the upper housing and positioned above the second power line penetration hole for sensing the temperature of the second power line, The split-type measuring device according to claim 1 or 2.

12. On the first side of the upper module, which is parallel to the extension direction and perpendicular to the surface that connects to the lower module, and which is the side facing the first line penetration hole, a first temperature measurement module is detachably connected to the upper module and senses the temperature of the first power line. The upper module includes a second temperature measuring module for sensing the temperature of the second power line, which is detachably coupled to the upper module at the second side of two sides parallel to the extension direction and perpendicular to the surface that connects to the lower module, on the side of the second line through-hole. The split-type measuring device according to claim 1 or 2.

13. Each of the first temperature measurement module and the second temperature measurement module is: The module connection pins that can be connected to the main body connection pins of the upper module, It can slide horizontally to move its position, and it is a temperature sensor that faces downwards to sense the temperature of the power line, This includes an electrical signal path interposed between the temperature sensor and the module connection pin, The split-type measuring device according to claim 12.

14. Each of the first temperature measurement module and the second temperature measurement module is: A sliding module is provided on which the temperature sensor is mounted, and on its lower surface there is a window or lens that allows sensing light for the temperature sensor to sense the temperature of the power line to pass through. Includes a guide case that guides the sliding of the sliding module, The split-type measuring device according to claim 13.

15. The upper surface of the sliding module is formed, and a plurality of microgrooves are formed in the lateral direction, The guide case includes a cantilever which is configured on the upper part, extends laterally, and has a projection formed at the lower part of its tip that is attached to one of the micro-grooves, The split-type measuring device according to claim 14.

Images