JP2005191399A - Measured-conductor positioning adaptor for clamping sensor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an adaptor for a clamping sensor whereby, when measuring a current by introducing to the inside of a space portion surrounded by a sensor portion a measured conductor brought into a live line, the position of the measured conductor is regulated rapidly and surely to enhance the current measurement accuracy. <P>SOLUTION: To a clamping sensor 91 is formed to introduce in a removable way a measured conductor L to the inside of a space S surrounded by a sensor 93, comprising a pair of opening/closing arms 94, 94, a measured-conductor positioning adaptor 11 is disposed via the space S. Further, the adaptor 11 has an opened/closed hole 50 for introducing thereto in a removable way the measured conductor L, and is formed in an freely/detachably from the side of the sensor 93. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention forcibly regulates the position of a conductor to be measured when measuring the current by introducing the conductor to be measured in a live line state into a space formed by a sensor unit that can be opened and closed by a clamp sensor. This is a technique related to a measured conductor positioning adapter for a clamp sensor that can obtain accurate measurement values.

  FIG. 12 is an explanatory view schematically showing an example of a conventional clamp sensor, of which (a) is an overall front view at the time of non-measurement, and (b) is an overall front view at the time of measurement. Show. In this case, the clamp sensor 1 includes a holding holder portion 2 and a sensor portion 3 having a substantially annular shape that is opened and closed by operating an operation lever (not shown) provided in the holder portion 2.

  In this example, the sensor unit 3 is composed of a pair of opening and closing arms 4 and 5 that surround and form the space S when the sensor unit 3 is closed. It can be introduced inside.

  In this case, if the conductor L to be measured can be positioned in a predetermined calibration position C where the magnetic flux from the sensor unit 3 is made uniform in the space S, the measurement is performed with high accuracy. Will be able to.

  However, it is difficult to accurately fix the measured conductor L at the calibration position C due to space limitations of the measurement location and the wiring location. As shown, it tends to be measured at a position deviating from the calibration position C. Therefore, in the initial calibration work, although it is considered that the calibration value determined by the relationship with the calibration position C can be obtained and corrected, the position in the space portion S that is out of the calibration position C is actually measured. As a result of the measurement, an error occurs between the calibration value and the actual measurement value, resulting in a problem that the measurement accuracy is lowered and the reliability is impaired.

As a solution to the above-mentioned problems found in the prior art, for example, separately prepare a positioning jig that can arrange the measured conductor at the center position in the space portion surrounded by the sensor portion, A current sensor mounting apparatus has been already proposed in which the current measurement accuracy is improved by preventing the conductor under measurement from deviating from the calibration position (see Patent Document 1).
Japanese Patent Laid-Open No. 11-121253

  However, depending on the disclosed technique of Patent Document 1, there is a problem that the above apparatus must be reattached for each measurement for each conductor to be measured, and a problem in work efficiency remains. In addition, the attachment of the above apparatus has a problem from the viewpoint of ensuring work safety because it must be fixed manually to the measurement lead wire with an adhesive tape or the like.

  In view of the above-mentioned problems found in the prior art, the present invention introduces a conductor to be measured in a live line state into a space formed by a sensor unit that can be opened and closed of a clamp sensor, and measures current. An object of the present invention is to provide a measured conductor positioning adapter for a clamp sensor that can quickly and surely regulate the position of the measured conductor to increase measurement accuracy.

The present invention has been made in order to achieve the above object, and for a clamp sensor that can freely introduce a conductor to be measured into a space portion surrounded by a sensor portion comprising a pair of opening and closing arms. A measured conductor positioning adapter disposed via a space,
The adapter is characterized in that it is provided with a positioning hole that can be freely opened and closed for introduction of the conductor to be measured, and that it can be freely attached to and detached from the sensor unit side.

  In this case, the adapter can be constituted at least by a one-side adapter part and an other-side adapter part that are opened and closed so as to form a positioning hole between the adapters when the adapter is closed. At least one or more sub-adapter prepared separately is provided in the adapter with a through hole that can be freely attached / detached through the positioning hole and can be freely opened and closed to introduce the conductor to be measured. Can be combined.

  The adapter includes an outer adapter portion having a substantially weight shape that has an open portion that opens in the center and opens to the center, and is detachably attached to the sensor portion side, and the outer adapter. And an inner adapter portion that is similar in shape to the inner space and is freely arranged to rotate in the circumferential direction in the inner space. The outer adapter portion and the inner adapter portion include the inner adapter portion. The positioning hole may be freely formed between the outer adapter portion and the outer adapter portion when rotated along the circumferential direction of the inner space. In this case, the adapter is provided with a positioning small hole that can be freely attached to and detached from the notch portion located at a position where the positioning hole is formed, and that can freely open and close the introduction of the conductor to be measured. It is also possible to combine at least one or more sub adapters separately prepared under a nested structure.

  According to the present invention, the measured conductor positioning adapter can be easily attached to and detached from the clamp sensor via the space formed by the sensor portion. In addition, since the adapter can be provided with a positioning hole that can be opened and closed in the space portion, the measurement hole can be opened with a simple operation of opening the positioning hole and introducing the conductor to be measured. The conductor can be arranged at a predetermined position. Therefore, measurement of the conductor to be measured can be performed quickly and reliably in a state where the accuracy of measurement is increased while reliably regulating the position, ensuring high reliability and safety and smoothing the measurement work. Can be accomplished.

  Further, when at least one sub adapter is combined with the adapter under a nested structure, a positioning small hole having an optimum inner diameter that can correspond to the outer diameter of the conductor to be measured at that time is appropriately formed. Therefore, even individual conductors to be measured having different outer diameters can be easily introduced into the positioning small holes to perform measurement with higher accuracy.

  FIG. 1 is an explanatory view schematically showing a clamp sensor equipped with a measured conductor positioning adapter (hereinafter simply referred to as “adapter”) according to the present invention, of which (a) is a non-measurement time. (B) shows the state at the time of introduce | transducing a to-be-measured conductor to the space part side by opening operation of a sensor part, respectively.

  According to these drawings, the clamp sensor 91 includes at least a holding holder portion 92 and a sensor portion 93 having a substantially annular shape that is opened and closed by operating an operation lever (not shown) provided in the holder portion 92. Is formed. The sensor portion 93 is composed of a pair of open / close arms 94 and 94 which surround and form the space portion S when closed, and thereby, the measured conductor L which is in a live state at the time of measurement is opened to the open space 98. Through the space S. In addition, the calibration position C is usually adjusted in the space S so that the magnetic flux interlinking with a sensor comprising a ring-shaped coil or Hall element (not shown) built in the sensor 93 is substantially uniform. For example, it is set based on the positional relationship shown in FIG.

  On the other hand, the adapter 11 assembled on the sensor unit 92 side through the space S is composed of the one-side adapter unit 12 and the other-side adapter unit 12 as shown in FIGS. As shown in FIG. 1B, a positioning hole 50 for freely opening and closing the conductor L to be measured is provided, and the sensor portion 92 is freely detachable.

  FIG. 2 is an overall perspective view showing a specific example of the adapter 11, and FIGS. 3A and 3B are explanatory views showing the open / closed state of the adapter 11. According to these figures, the adapter 11 having a well-known bobbin shape as a cylindrical shape with a collar portion is provided with a one-side adapter portion arranged along the outer peripheral surface 13 along the inner side surface 95 of one opening / closing arm 94. 12, and the other side adapter portion 22 disposed along the outer peripheral surface 23 along the inner side surface 95 of the other opening / closing arm 94. The one side adapter portion 12, the other side adapter portion 22, Are connected to each other in a freely openable and closable manner by a hinge 21 interposed between the opposed edges 14a and 24a of the flat surfaces 14 and 24 provided at a portion facing the top portion 92a of the holder portion 92 shown in FIG.

  In addition, the one-side adapter part 12 and the other-side adapter part 22 face each other when closed, and can form a positioning hole 50 for the conductor L to be measured at a site corresponding to the calibration position C. Circular recesses 15 and 25 are provided separately.

  Further, the outer peripheral surface 13 of the one-side adapter portion 12 and the outer peripheral surface 23 of the other-side adapter portion 22 are respectively engaged with the inner peripheral edges 96 of the pair of opening / closing arms 94 and 94 shown in FIG. As shown in FIG. 2, rib-like ribs 16, 26 that are prevented from falling off are provided continuously, and if necessary, are provided separately.

  Further, in the one-side adapter portion 12 and the other-side adapter portion 22, either one of the opposed end surfaces 17 and 27 that are located on the distal end side and come in contact with or separated from each other, in the example of FIG. The end face 17 is provided with a pair of holes 18, 18, and a pair of protrusions 28, 28 that are fitted to the holes 18, 18 are provided at the corresponding positions of the opposite end face 27 located on the left side. This ensures that the closed state can be maintained.

  FIG. 4 is an overall perspective view showing another example of the adapter 11 similarly having a bobbin shape, and FIG. 5 is a view showing the one-side adapter part 12 and the other-side adapter part 22 divided into two parts with the same structure. Among them, FIG. 4 is an overall perspective view of the one-side adapter portion 12 located on the lower side, and FIGS. 6A and 6B are explanatory views showing the open / closed state of each other.

  According to these drawings, the adapter 11 includes a one-side adapter portion 12 having a semicircular shape arranged along the outer peripheral surface 13 along the inner side surface 95 of one opening / closing arm 94 shown in FIG. The open / close arm 94 is composed of an inner adapter 95 having a semicircular shape arranged along the outer peripheral surface 23 along the inner surface 95.

  In addition, the one-side adapter portion 12 and the other-side adapter portion 22 are circular when they are closed and face each other, and a positioning hole 50 for the conductor L to be measured is formed at a position corresponding to the calibration position C. The semicircular recesses 15 and 25 that can be formed are provided separately.

  Further, the outer peripheral surface 13 of the one-side adapter portion 12 and the outer peripheral surface 23 of the other-side adapter portion 22 are respectively engaged with the inner peripheral edges 96 of the pair of opening / closing arms 94 and 94 shown in FIG. As shown in FIG. 4, rib-like ribs 16, 26 that are prevented from falling off are provided continuously, and if necessary, are discontinuous.

  Further, the one-side adapter portion 12 and the other-side adapter portion 22 have a pair of hole portions 18 and 18 and a pair of projecting portions 28 and 28 that are fitted to each other on one facing end surfaces 17 and 27 that face each other when they are closed. However, the other opposing end surfaces 19 and 29 are provided with a pair of protrusions 20 and 20 and a pair of holes 30 and 30 which are fitted to each other. Further, the one-side adapter part 12 and the other-side adapter part 22 are substantially the same as each other in the facing end faces 17, 27 and 19, 29, for example, when the clamp sensor 91 shown in FIG. As shown in FIG. 6A, an open space 98 for introducing the conductor L to be measured is secured, and the closed state can be reliably maintained during the measurement. ing.

  7 is an overall perspective view showing an arrangement relationship between the adapter 11 shown in FIG. 4 and a sub-adapter combined with the adapter 11 under a nested structure, and FIG. 8 is a lower portion as one of them. 9 (a) and 9 (b) are explanatory views showing the open / close state of each other.

  According to these drawings, the sub-adapter 31 can be freely attached and detached through the positioning hole 50, and the positioning small hole 51 that can be freely opened and closed at the portion corresponding to the calibration position C. It is prepared separately by forming so that it may become a shape similar to the adapter 11.

  That is, as is apparent from FIGS. 7 and 8, the sub-adapter 31 is a one-side sub-adapter part that exhibits a semicircular shape arranged along the outer peripheral surface 33 of the concave part 15 of the one-side adapter part 12. 32 and the other side sub-adapter part 42 which exhibits the semicircle arrange | positioned along the outer peripheral surface 43 in the recessed part 25 of the other side adapter part 22. As shown in FIG.

  In addition, the one-side sub-adapter part 32 and the other-side sub-adapter part 42 become circular when closed and face each other, and positioning small holes for positioning the conductor L to be measured at a position corresponding to the calibration position C The semicircular recesses 34 and 44 capable of forming 51 are provided separately.

  Further, as shown in detail in FIG. 8, both the outer peripheral surface 33 of the one-side adapter portion 32 and the outer peripheral surface 43 of the other-side sub-adapter portion 42 are provided on both sides of the concave portion 15 of the one-side adapter portion 12. A hook-like rib 35 that engages with the groove 15a provided on the peripheral edge side and the groove 25a provided on both peripheral edge sides of the concave portion 25 of the other-side adapter part 22 and prevents the drop-off. , 45 are continuously provided as shown in FIG. 7 and are provided separately from each other if necessary.

  Further, the one side sub-adapter part 32 and the other side sub-adapter part 42 have a pair of holes 37 and 37 and a pair of protrusions 47 that are fitted to each other on one opposing end face 36 and 46 that face each other when closed. 47, and the other opposed end faces 38, 48 are provided with a pair of projections 39, 39 and a pair of holes 49, 49, respectively. In addition, the one side sub-adapter part 32 and the other side sub-adapter part 42 are arranged such that, for example, when the opening operation on the sensor part 93 side of the clamp sensor 91 shown in FIG. As shown in FIG. 9A, an open space 98 for introducing the conductor L to be measured is secured, and the closed state is reliably ensured during the measurement. It can be maintained.

  FIG. 10 is an explanatory view showing still another specific example of the adapter 11, in which (a) is an overall perspective view showing a state before the positioning hole is formed, (b) is a side view thereof, ( c) is an overall perspective view showing a state in which the positioning hole is formed, and (d) is a side view thereof.

  According to these figures, the adapter 11 has an open portion 59 that opens in the peripheral direction and extends in the center direction, and has a substantially weight shape that can be freely attached to and detached from the sensor portion 63 shown in FIG. And an inner adapter portion 62 that has a shape similar to that of the outer adapter portion 52 and can be freely rotated in the inner space 58 in the circumferential direction.

  Among these, the outer adapter part 52 is formed under a structure that can be attached to and detached from the sensor part 93 shown in FIG. Specifically, a tubular portion 53 having a cut-out portion 54 in a direction orthogonal to the circumferential direction and having a substantially C-shape, and formed on both side surfaces of the tubular portion 53 and opening the cut-out portion 54 side. By providing each side plate portion 55 having a notch portion 56 extending in the center direction and forming a rib 57, an internal space 58 having an open portion 59 composed of the cut portion 54 and the notch portion 56 is provided. The entire outer adapter portion 52 is formed. Further, at least one of the side plate portions 56 includes a guide hole 60 having a semicircular shape that is drilled so as to secure a required length along the circumferential direction.

  Further, the inner adapter portion 62 is disposed in the inner space 58 of the outer adapter portion 52 so as to freely rotate in the circumferential direction, and the shape thereof is substantially similar to the outer adapter portion 52. . That is, the inner adapter part 62 is formed on the both sides of the small-diameter cylindrical part 63 and the small-diameter cylindrical part 63 having a cut-out part 64 in a direction orthogonal to the circumferential direction and having a substantially C-shape. By providing each side plate part 65 having a notch part 66 that opens to the center part 64 side and that forms a rib 67, an open part composed of the cut part 64 and the notch part 66 is provided. An internal space 68 having 69 is defined to form the whole.

  Furthermore, the side plate portion 65 of the inner adapter portion 62 that is in a positional relationship facing the guide hole 60 of the side plate portion 65 has an operation protrusion 70 that can close the cut portion 54 of the outer adapter portion 52 with the small diameter cylindrical portion 63. The top part 70a protrudes from the guide hole 60 having a semicircular shape.

  For this reason, in the adapter 11 shown in FIG. 10, the top part 70a of the operation protrusion 70 is sandwiched so that the inner adapter part 62 is located on the opposite side of the cut part 54 of the outer adapter part 52, By making a half turn along the guide hole 60, the positioning hole 50 can be formed between the outer adapter part 52 as shown in FIGS. 10 (c) and 10 (d). .

  FIG. 11 is an explanatory diagram showing an example in which a sub-adapter is further arranged in a nested structure with respect to the adapter 11 shown in FIG. In this case, the sub-adapter 71 has a small shape, but is composed of an outer adapter portion 72 and an inner adapter portion (not shown), similar to the adapter 11 shown in FIG. 10, and extends along a semicircular guide hole 73. Since the positioning small hole 51 can be formed by pinching the top portion 74a of the operation projection 74 on the inner adapter portion side and making a half turn, detailed description thereof will be omitted.

  Next, taking the adapter 11 shown in FIG. 2 as an example, the operation and effect of the present invention will be described with reference to FIG. 1. The clamp sensor 91 opens a pair of opening and closing arms by opening an operation lever (not shown). For example, the open space 98 as shown in FIG. 1 (b) can be secured between the sensor unit 63 having 64 and 65 in the open state.

  The adapter 11 sends the part where the hinge 21 is located into the sensor part 63 through the open space 98 in a positional relationship toward the top part 92a side of the holder part 92, and then closes the sensor part 63. As shown in FIG. 1A, it can be disposed on the clamp sensor 91 side.

  At this time, when the one-side adapter portion 12 and the other-side adapter portion 22 are provided with ribs 16 and 26 that engage with the inner peripheral edge 96 of the sensor portion 93, the clamp sensor 91 side is prevented from falling off and is surely secured. Can be assembled to.

  Moreover, when the one-side adapter portion 12 and the other-side adapter portion 22 are contacted and closed, the positioning hole 50 for the conductor L to be measured that has a positional relationship corresponding to the preset calibration position C. As shown in FIG. 1 (b), the positioning formed by the recesses 15 and 25 through the open space 98 secured when the sensor portion 93 and the adapter 11 are opened. The conductor L to be measured can be easily introduced into the hole 50 side.

  After the conductor L to be measured is introduced to the positioning hole 50 in this way, the conductor L to be measured positioned without greatly deviating from the calibration position C can be obtained by closing the sensor portion 93 and the adapter 11. It can be measured accurately. At this time, when the hole 18 and the projection 28 that are fitted to each other are provided on the opposing end surfaces 17 and 27 of the one-side adapter part 12 and the other-side adapter part 22, A closed state with the other side adapter part 22 can be maintained reliably. Such a series of actions and effects can be obtained in the same manner by using the adapter 11 shown in FIG.

  In addition, when the adapter 11 shown in FIGS. 2 and 4 is used, even if the conductor L to be measured has a small diameter, the sub-adapter 31 is incorporated under a nested structure as shown in FIG. Since the positioning small hole 51 can be formed in the corresponding part of the calibration position C as shown in FIG. 9B, it can be easily handled. Further, the sub adapter 31 can be securely attached by preventing the drop off by engaging the ribs 35 and 45 with the groove portions 15a and 25a formed in the concave portions 15 and 25 on the adapter 11 side.

  On the other hand, the adapter 11 shown in FIG. 10 has an outer adapter portion 52 that can be freely attached to and detached from the sensor portion 63 side, and is similar to the outer adapter portion 52 in the circumferential direction in the inner space 68. It is comprised with the inner side adapter part 62 arrange | positioned freely. Therefore, after the adapter 11 is in the state shown in FIG. 10 (b), the conductor L to be measured is introduced into the open portions 59 and 69, and then the inner adapter portion 62 is sandwiched by the top portion 70 a of the operation protrusion 70. The conductor to be measured L is arranged in the positioning hole 50 where the calibration position C as shown in FIG. 10D exists between the outer adapter portion 52 and the outer adapter portion 52 by half-turning along the guide hole 60. Thus, the measurement work can be performed accurately.

  FIG. 11 is an explanatory diagram showing an example in which a sub-adapter is further arranged in a nested structure with respect to the adapter 11 shown in FIG. In this case, the sub-adapter 71 has a small shape, but is composed of an outer adapter portion 72 and an inner adapter portion (not shown), similar to the adapter 11 shown in FIG. 10, and extends along a semicircular guide hole 73. Since the positioning small hole 51 can be formed by pinching the top portion 74a of the operation projection 74 on the inner adapter portion side and making a half turn, detailed description thereof will be omitted.

  In addition, when the adapter 11 shown in FIG. 10 is used, even if the conductor L to be measured has a small diameter, as shown in FIG. Since the positioning small hole 51 can be formed in the site, it can be easily handled. Further, the sub-adapter 71 can be securely attached by preventing the drop-off by engaging the rib 75 side with the notch 56 formed on the both side plates 55 of the adapter 11 as shown in FIG. it can.

  Although the present invention has been described with reference to the illustrated examples, the specific contents of the present invention are not limited to the above-described embodiments. For example, each adapter 11 in the above embodiment is shown as having a substantially circular side shape, but is not limited to this, and matches the inner peripheral shape of the sensor portion of the clamp sensor. The design can be changed as appropriate as long as it has a side shape.

  Moreover, it is preferable to form the adapter 11 and the sub adapters 31 and 71 according to the present invention using an insulating elastic synthetic resin material or a hard synthetic resin material from the viewpoint of preventing a short circuit with the conductor L to be measured. However, as long as it is a nonmagnetic material having insulating properties, it can be formed using an appropriate material such as a rubber material or wood.

  Further, the position of the positioning hole 50 formed by the adapter 11 and the positioning small hole 51 formed by the sub-adapter 31, 71 is determined only in relation to the calibration position C, as shown in the illustrated example. The sensor portion 93 is formed not only at the center position of the space portion S but also at a predetermined portion determined by the relationship with the calibration position C determined as appropriate.

  Furthermore, if the adapter 11 is a parent and the sub-adapter 31 or 71 is a child, any number is combined, for example, a sub-adapter corresponding to at least a grandchild is further combined under a nested structure, although not shown. Therefore, it is possible to correspond to a conductor to be measured having a smaller diameter.

  The adapter according to the present invention is not only applied to a handy type clamp sensor having a pair of arms that can be freely opened and closed, but can be used for various clamp sensors as required, such as a stationary type clamp sensor. Can be applied.

It is explanatory drawing which showed typically the clamp sensor equipped with the adapter which concerns on this invention, (a) is a closed state at the time of non-measuring, (b) is a conductor to be measured by opening a sensor part Each of the states when introducing to the space part side is shown. The whole perspective view which shows the specific example of the adapter which concerns on this invention. Explanatory drawing which shows the open state of the adapter of FIG. 2 as (a), and shows a closed state as (b). The whole perspective view which shows the other specific example of the adapter which concerns on this invention. FIG. 5 is an overall perspective view showing one side of the adapter shown in FIG. 4. Explanatory drawing which shows the open state of the adapter shown in FIG. 4 as (a), and shows a closed state as (b). The whole perspective view which shows the application example of the adapter shown in FIG. The whole perspective view which shows one side of the adapter shown in FIG. Explanatory drawing which shows the open state of the adapter shown in FIG. 7 as (a), and shows a closed state as (b). It is explanatory drawing which shows the other specific example of the adapter which concerns on this invention, (a) is the whole perspective view which shows the state before forming a positioning hole, (b) is the side view, (c) ) Is an overall perspective view showing a state where positioning holes are formed, and (d) is a side view thereof. Explanatory drawing which shows the example which enabled the correspondence to a to-be-measured conductor of a smaller diameter by further arrange | positioning an auxiliary | assistant adapter with a nesting structure with respect to the adapter shown in FIG. It is explanatory drawing which shows an example of the conventional clamp sensor typically, (a) of them shows the whole front view at the time of non-measurement, (b) shows the whole front view at the time of measurement, respectively.

Explanation of symbols

11 Measuring conductor positioning adapter 12 One side adapter 22 Other side adapter 13, 23 Outer peripheral surface 14, 24 Flat surface 14a, 24a Opposing edge 15, 25 Recess 15a, 25a Groove part 16, 26 Rib 17, 27 Opposing end face 18 Hole part 28 Protrusion 19, 29 Opposing end face 20 Protrusion
21 Hinge 30 Hole 31 Sub-adapter 32 One side sub-adapter 42 Other side sub-adapter 33, 43 Outer peripheral surface 34, 44 Recess 34a, 44a Groove 35, 45 Rib 36, 46 Opposing end face 37 Hole 47 Protruding part 38, 48 Opposing End face 39 Protruding part 49 Hole part 50 Positioning hole 51 Positioning small hole 52 Outer adapter part 62 Inner adapter part 53 Tubular part 63 Small diameter tubular part 54, 64 Cut part 55, 65 Side plate part 56, 66 Notch part 57, 67 Rib 58, 68 Internal space 59, 69 Open part 60 Guide hole 70 Operation protrusion 71 Sub adapter 72 Outer sub adapter 73 Guide hole 74 Operation protrusion 74a Top part 75 Rib 91 Clamp sensor 92 Holder part 92a Top part 93 Sensor part 94 Opening and closing arm 95 Inner circumference Surface 96 Inner peripheral edge 98 Open space C Calibration position L Conductor under test S Space

Claims (5)

This is a measured conductor positioning adapter disposed via the space for a clamp sensor that can be freely introduced into a space formed by a sensor composed of a pair of open / close arms. And
The adapter is provided with a positioning hole that can freely open and close the introduction of the conductor to be measured, and is formed to be freely attachable to and detachable from the sensor portion side. adapter.   2. The clamp sensor according to claim 1, wherein the adapter is formed of at least a one-side adapter portion and an other-side adapter portion that are substantially bobbin-shaped when being closed and are opened and closed so that the positioning holes can be formed therebetween. Measuring conductor positioning adapter for.   The adapter includes a positioning small hole that can be freely attached and detached through the positioning hole and that can freely open and close the introduction of the conductor to be measured. A measured conductor positioning adapter for a clamp sensor as claimed in claim 2 combined under the above. The adapter includes an outer adapter portion having an open portion that opens in the center direction and opens in the center direction, and is formed so as to be freely attachable to and detachable from the sensor portion side. It is constituted at least by an inner adapter part that exhibits a similar shape to the adapter part and is freely arranged to rotate in the circumferential direction in its internal space,
The outer adapter part and the inner adapter part are arranged such that the positioning hole can be freely formed between the outer adapter part and the outer adapter part when the inner adapter part is rotated along the circumferential direction of the inner space. A measured conductor positioning adapter for the clamp sensor according to claim 1. The adapter is separately prepared with a positioning small hole that can be freely attached to and detached from the notch portion located at a position where the positioning hole is formed, and that can freely open and close the introduction of the conductor to be measured. 5. The measured conductor positioning adapter for a clamp sensor according to claim 4, wherein at least one or more sub adapters are combined under a nested structure.

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