KR101926763B1 - Probe unit for pole transformer - Google Patents

Abstract

According to the present invention, a probe unit for a pole transformer comprises: a support fixture having a mounting groove which is opened upwardly and back and forth formed thereon and a plurality of engagement grooves formed on the opposite outer side of the mounting groove with a gap from one end toward the other end; a connecting pin in which an insertion tip is provided so as to protrude upwardly in the mounting groove and made of a conductor; a gasket fitted in the insertion tip so as to protrude upward from the insertion tip; and a lid part detachably fixed to the other end of the support by wrapping around the wire located on a connection pin in a state where the lid part is selectively engaged with any one of the plurality of engagement grooves and configured to press the wire so that the insertion tip penetrates through the coating of the wire and contacts the core wire and allow a gasket to stick to seal the portion of penetrated through by the insertion tip. Therefore, it is possible to increase the reliability of the PLC communication due to the perfect connection between the connection pin and a secondary drop wire to firmly fix the secondary drop wire of various diameters. Further, not only the contact resistance can be reduced by the multiple connection pins and the multiple insertion tips, but also the contact reliability can be increased. It is possible to prevent the deterioration of the connecting portion by implementing a waterproof structure for the contact portion of the secondary drop wire by the connection pin.

Description

[0001] PROBE UNIT FOR Pole Transformer [0002]

The present invention relates to a probe unit for a punch transformer, and more particularly to a probe unit for a punch transformer, which enables complete connection between a connecting pin and a secondary cut-off wire, stably secures a secondary cut wire of various diameters, And a probe unit for a pillar transformer having a waterproof structure with respect to a contact part of a secondary lower wire.

Generally, a pillar transformer is a device for reducing pressure-converted high-voltage power supplied from a substation in a fixed state using a fixing band or bolt and screw or the like to a usable voltage at a point of use (consumer) Is connected to a power supply line for supplying power to the power use point.

The pole transformer is connected to DCU (Data Concentration Unit), which is the main material of AMI (Advanced Metering Infrastructure) system, to supply power to DCU, to transmit PLC (Power Line Communication) signal, And a probe unit (probe unit) for measuring the current.

A conventional probe unit is disclosed in Korean Patent No. 10-1548178 entitled " Voltage and Current Measurement Probe for a Pole Transformer Distribution Line, "which comprises a lower bracket for forming a wire insertion port to be exposed at an upper center portion, An upper bracket connected to the upper side of the lower bracket by a hinge to be locked while being opened and closed, and a measuring pin provided at the lower bracket so that the leading end of the lower bracket is protruded from the wire inserting hole, for measuring the voltage and current of the pole transformer distribution line The probe includes a pushing member which is vertically movably inserted into a vertically upper portion of a center portion of the upper bracket, and a pushing member which is screwed vertically into the center of the upper portion of the upper bracket, As the pushing-adjusting member is tightened, the pushing- And the measuring pin is vertically positioned at the center of the inner bottom of the lower bracket so that the distal end of the measuring pin protrudes perpendicularly to the wire inserting hole, So that the wire contacts the measuring pin when pressed.

However, since such a conventional technique is used for a wire having a certain thickness, it is unstable or impossible to fix the wire having various thicknesses (22 to 150 mm 2), and therefore, due to the connection failure to the wire of the wire, The signal transmission becomes impossible and even if it is correctly installed, the connection part to the core wire of the electric wire due to the elapse of time has a problem of causing contact failure due to vibration or shaking.

Also, in the prior art, due to the structure of contacting the core wire through the coating of the wire, moisture penetrates into the open portion of the coating with time, thereby increasing the contact resistance, thereby lowering the reliability of the measurement .

Korea Patent Registration No. 10-1847456 (Aug. 04, 04.) 'Probe unit for pillar transformer'

In order to solve the problems and necessities of the related art as described above, the present invention improves the reliability of the PLC communication due to the perfect connection between the connection pin and the secondary lower line, and firmly secures the secondary lower line of various diameters Not only reduces the contact resistance to the core wire of the secondary reduction wire but also improves the contact reliability and improves the deterioration of the connection point to the core wire of the secondary wire due to the waterproof structure against the contact portion of the secondary wire by the connecting pin And a probe unit for a pneumatic transformer.

In order to achieve the above object, a probe unit for a pneumatic transformer according to the present invention has a mounting groove which is opened upwardly and backward and forward, and a plurality of fastening members are provided on an opposite outer surface of the mounting groove, A support for forming a groove; A connection pin provided so as to protrude upward from the insertion tip in the mounting groove, the connection pin comprising a conductor; A gasket fitted to the insertion tip to be installed in the mounting groove such that the insertion tip protrudes upward; And a plurality of latching grooves, the end of which is selectively detachably attached to the other end of the support rod while wrapping the electric wire located on the connection pin in a state of being selectively engaged with the plurality of engagement grooves, thereby pressing the electric wire, A cover which penetrates through the cover so as to be brought into contact with the core wire and which allows the gasket to adhere to the penetration portion of the cover by the insertion tip for sealing; Wherein the body is fixed to a side of the support, and a groove is formed in the body so as to allow the electric wire to pass therethrough so as to be opened upward and forward and backward, and a cover is coupled to the upper side of the body so as to open and close the groove, Wherein the CT unit is provided with a CT so as to allow current measurement for the main body, and the support is formed with a slit between the main body and the main body such that the cover is inserted to engage with the latching groove, Wherein each of the engagement grooves is formed in a radial direction with respect to a center of curvature of the mounting groove, and the connection pins are provided in the support base in a plurality of widthwise directions, and the gasket is provided in each of the engagement pins, And the lid part is formed with a hook part at one end so as to be caught in any one of the plurality of latching grooves And a clamping piece for being fastened with screws or bolts to the support base is hinged at the other end, and the connecting piece is hinged to one end of the clamping piece in the mounting groove direction And a second cylindrical hole having a diameter larger than the diameter of the first cylindrical hole, and connecting the first cylindrical hole and the second cylindrical hole to each other, A first protrusion hole penetrating through the first protrusion; A threaded portion formed at the open end of the second cylindrical hole and in the inner diameter portion in a two-line threading manner; A blocking portion provided at an open end of the second cylindrical hole by screwing the thread in a two-row threading manner; The one end of the small diameter inserted through the second cylindrical hole protrudes in the direction of the mounting groove through the first cylindrical hole and the other of the jaws having a large diameter is inserted into the second cylindrical hole, A contact portion that does not pass through the hole and moves linearly along the longitudinal direction in the second cylindrical hole; A spring portion inserted in the second cylindrical hole and installed in the second cylindrical hole by the blocking portion to apply an elastic force to the jaw portion of the contact portion to move the contact portion in the direction of opening the first cylindrical hole; . ≪ / RTI >

According to the present invention having the above configuration, the reliability of the PLC communication can be improved due to the perfect connection between the connection pin and the secondary lower wire, and the secondary lower wire of various diameters can be firmly fixed, The reliability of the PLC signal transmission and the voltage measurement can be improved irrespective of the number of the connection pins. In addition to the contact with the secondary wire of the secondary wire by the multiple connection pins, Due to the contact, the contact resistance can be reduced, and the contact reliability can be improved. Also, due to the waterproof structure of the contact portion of the secondary lower wire by the connecting pin, water inflow to the secondary wire contact portion of the lower wire Thereby preventing deterioration of a connection point.

1 is a perspective view showing an open state of a probe unit for punching transformer according to an embodiment of the present invention.
2 is a perspective view showing an open state of a probe unit for pillar transformer according to another embodiment of the present invention.
3 is a plan view showing a probe unit for pillar transformer according to another embodiment of the present invention.
4 is a side view showing the use of the probe unit for pillar transformer according to another embodiment of the present invention.
5 is a side view showing another use of the probe unit for punching transformer according to another embodiment of the present invention.
6 is an AA sectional view for explaining a configuration of a connection pin according to an embodiment of the present invention.
And
Fig. 7 is a side sectional view for explaining the configuration of the pushing portion according to the embodiment of the present invention. Fig.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and will be described in detail in the detailed description. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated and described in detail in the drawings. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but is to be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention, And the scope of the present invention is not limited to the following examples.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings, wherein like or corresponding elements are denoted by the same reference numerals, and redundant explanations thereof will be omitted.

1 is a perspective view showing an open state of a probe unit for punching transformer according to an embodiment of the present invention.

1, a probe unit 100 for a pillar transformer according to an embodiment of the present invention may include a support 130, a connection pin 140, a gasket 150, and a cover 160, A structure in which the secondary winding of the pneumatic transformer is not separated but is firmly attached to the electric wire by each phase is provided so as not to be undesirably detached after attachment and the covering of the secondary winding cut line of the pillar transformer is removed by the connecting pin 140 It can be connected to the core wire and can support the connection with the power line of 120SQ or more and can be configured to meet the dustproof and waterproof grade (protection class: IP56, test standard: IEC 60529).

The probe unit for a pneumatic transformer according to embodiments of the present invention may be configured as either a voltage-free probe unit without a CT or a CT-type probe unit, depending on whether or not a CT (Current Transformer) is provided. The probe unit 100 for a pillar transformer according to an embodiment of the present invention corresponds to a voltage type probe unit without a CT (Current Transformer) and is connected to a secondary cut-off line of a pillar transformer to a distribution line, (Not shown) through a connection pin 140 for voltage measurement from a secondary cut-off line of a pillar transformer. The voltage measurement, DCU power supply, PLC signal can be applied. Here, the lead wire 170 can be drawn out from the support stand 130, and the lead wire 170 is electrically connected or connected to the connection pin 140 for power supply and signal application to the DCU and the like. At the end of the lead wire 170, a connector for connection with the DCU may be provided.

The support base 130 is formed with a mounting groove 135 which is open upward and forward and backward and a plurality of latching grooves 131, 132 and 133 may be formed on the opposite outer surface of the mounting groove 135 with a gap from one end toward the other end . The support base 130 may be made of a material such as an insulating synthetic resin or the like. For example, as in the present embodiment, the support base 130 may be formed in a "U" shape, and each of the engagement grooves 131, 132, Respectively, thereby facilitating formation and compactness of each of the plurality of latching grooves 131, 132, and 133 and enabling a stable latching thereof.

The connection pin 140 is formed to protrude upward from the insertion tip 141 in the mounting groove 135, and may be formed of a conductor. The connection pin 140 may be directly connected to the lead wire 170 through the inside of the support member 130 in the case of a voltage type probe unit without CT (Current Transformer) as in the present embodiment.

A plurality of, for example, two, connection pins 140 may be installed in the support base 130 in the width direction, and gaskets 150 may be installed on the support pins 130, respectively. The connecting pin 140 may also be formed with a plurality of, for example, three, insertion tips 141 along the circumference of the wire 10 (see FIG. 4) in the mounting groove 135. 4) along the longitudinal direction at the wire 10 by the plurality of connecting pins 140 as well as the number of the plurality of insertion tips 141 The connection and the reliability of the connection to the electric wire 10 can be enhanced by making the electric wire 10 in multiple contact with the core wire 11 along the circumferential direction. That is, the insertion tip 141 is configured to act like a blade, and the cover 12 is pierced so that the connection pin 140 is smoothly connected to the core wire 11.

It is a matter of course that one or more than one connection pin 140 may be provided in the longitudinal direction and the width direction of the electric wire 10, respectively.

The gasket 150 is fitted in the mounting groove 135 by being fitted to the outer surface of the insertion tip 141 and the connection pin 140 so that the insertion tip 141 and the connection pin 140 protrude upward. The gasket 150 is brought into close contact with the sheath 12 (see FIG. 4) of the wire 10 (see FIG. 4) so that the perforated portion of the sheath 12 is sealed by the insertion tip 141, And can be made of various materials such as rubber, urethane or synthetic resin material having excellent elasticity.

The lid portion 160 may be formed to cover an electric wire 10 (see FIG. 4) positioned on the connection pin 140 while being selectively engaged with any one of the plurality of latching grooves 131, 132 and 133, So that the insertion tip 141 is brought into contact with the core wire 11 (see FIG. 4) through the cover 12 (see FIG. 4) in the wire 10, The gasket 150 is brought into close contact with the penetrating portion of the sheath 12 (see FIG. 4) of the wire 10 by the insertion tip 141 for sealing.

The lid portion 160 is formed with a ring portion 161 at one end so as to be caught in any one of the engagement grooves 131, 132 and 133, and is pressurized to provide a pressing force by surface contact with the electric wire 10 And a fastening piece 163 for fastening a screw 165 or a bolt to the support base 130 can be hinged to the other end. The fastening piece 163 may be formed with a fastening hole 164 for fastening the screw 165. A threaded groove 134 for fastening the screw 165 may be formed on the upper surface of the other end of the supporter 130.

The operation of the probe unit 100 for a pillar transformer according to one embodiment of the present invention having such a structure will be described in the corresponding portion of the probe unit 200 for pillar transformer according to another embodiment of the present invention.

3 is a plan view showing a probe unit for a pneumatic transformer according to another embodiment of the present invention, and FIG. 4 is a plan view showing a probe unit for a pillar transformer according to another embodiment of the present invention. Fig. 6 is a side view showing the use of the probe unit for punching transformer according to another embodiment of the present invention. Fig.

2 to 4, the pillar transformer probe unit 200 according to another embodiment of the present invention includes a support base 130, a connection pin 140, a gasket 150, a cover 160, 110 and a cover 120. The CT section 110,

When the probe unit 200 for a pillar transformer according to another embodiment of the present invention is constructed as a CT type, the probe unit 200 is coupled to each phase of the secondary winding of the pillar transformer in the distribution line, and the current and voltage measurement, DCU (Data Concentration Unit) Supply and PLC (Power Line Communication) signal application. It is also possible to perform voltage measurement by the connection pin 140, and to enable current measurement by the CT units 110 and 120 , But can be configured to support current measurements of full transformer capacity (10kVA to 150kVA) without structural modification. Here, the lead wire 170 may be drawn from the main body 110 to supply power and apply a signal to the DCU. At the end of the lead wire 170, a connector for connection with the DCU may be provided.

The support pin 130, the connection pin 140, the gasket 150, and the cover 160 in the pillar transformer probe unit 200 according to another embodiment of the present invention may be used for a pillar transformer The same reference numerals as those of the probe unit 100 (see FIG. 1) are used, so that duplicate descriptions are omitted. The connection pin 140 may be connected to the lead wire 170 drawn out from the main body 110 via a separate measuring part inside the CT units 110 and 120 in the case of the CT type probe unit as in the present embodiment .

The CT units 110 and 120 have a body 110 fixed to the side of the support 130 and a groove 111 opened upward and forward and rearward to allow the wire 10 to pass through the body 110. The body 110, A cover 120 is coupled to the upper portion of the main body 110 and the cover 120 so as to be able to open and close the groove portion 111. A CT (Current Transformer) . Here, the CT includes, for example, a coil for measuring a current or an element having the same or similar function.

The main body 110 may be made of a material composed of any one material selected from among synthetic materials such as synthetic resin, leather, cloth, wood, stone, rubber, . In this embodiment, the support base 130 may be formed with a slit 136 between the support base 130 and the main body 110 so that the cover 160 is inserted to engage with the engagement grooves 131, 132, and 133.

The cover 120 can be pivotably coupled to the main body 110 and the hinge coupling part 121 at one side and the other end can be detached and attached by the fixing band 113 and the coupling part 122, Possibly combined. For example, the fixing band 113 may be formed of a cicadic ring, may be provided at the other end of the main body 110, and the locking part 122 may be formed at the other end of the cover 120, However, the fixing band 113 and the engaging part 122 may be reversed in position. Further, the cover 120 may be formed with a groove 123 opened downward and forward and backward to face the groove 111 of the main body 110.

The operation of the pillar transformer probe unit according to another embodiment of the present invention will now be described.

2, when the lid part 160 is opened on the support pin 130, the electric wire 10 is placed on the connection pin 140 on the mounting groove 135 as shown in Fig. 4 Considering that the wire 10 is relatively large in diameter, the hook 160 of the cover 160 is hooked to the hooking groove 131 closest to one end of the support 130, The insertion tip 141 is pressed against the support wire 130 by the screw 165 so that the insertion tip 141 is covered with the cover wire 160 12 to be connected to the core wire 11. At this time, when the electric wire 10 is positioned in the groove 111 of the main body 110 and the groove 123 of the cover 120, the fixing band 113 is hooked on the engaging portion 122, So that the cover 120 is positioned around the electric wire 10 while being coupled to each other.

5, when the diameter of the electric wire 20 is relatively small, the hook 161 of the lid 160 may be appropriately selected among a plurality of the engagement grooves 131, 132, and 133 considering the small diameter of the electric wire 20, And then the connecting piece 163 of the lid part 160 is fixed to the supporting table 130 with the screw 165 while the electric wire 10 is pressed by the lid part 160 , So that the insertion tip 141 penetrates the sheath 21 of the wire 20 and is connected to the core wire 22 by such a pressing force.

In this manner, the wires 10 and 20 having various thicknesses are securely fixed, so that the connection pins 140 and the core wires 11 and 22 of the wires 10 and 20, Ensure that the connection between the core wires is maintained firmly and stably. The connecting pin 140 can easily penetrate the sheaths 12 and 21 of the electric wires 10 and 20 and easily contact the core wires 11 and 22 by the fixing operation of the cover 160 by fastening the screws 165. [ .

In addition, by the multiple connection pin 140 connection structure and the multiple insertion tip 141 connection structure, it is possible to have three points, for example, three points in one connection pin 140 and two or four or six connection pins There may be an improvement in the contact reliability between the connection pin 140 and the core of the transformer secondary cut line and the contact resistance is greatly reduced due to the 6-point or 12-point or 18-point connection.

The peripheral portion of the connection pin 140 is sealed by the gasket 150 so as to be waterproofed so that the insertion tip 141 penetrates through the covering 12, 22 of the electric wire 10, So that it is possible to implement a simple waterproof function without requiring a separate sealing member or the like.

However, as time elapses, the sharpness of the end of the connection pin 140 becomes dull due to the own weight of the electric wire 10, vibration generated by the surroundings, vibration generated by rain, wind or the like, There is a problem that the reliability is lowered and the contact resistance is greatly increased.

Therefore, even if the sharpness of the end portion of the connection pin 140 becomes dull due to the lapse of time or the weight and vibration of the electric wire 10, or the contact position is changed or deviated, the reliability of the contact can be continuously maintained and the contact resistance can be continuously reduced It is a technical matter of the present invention.

6 is a cross-sectional view taken along the line A-A for explaining a configuration of a connection pin according to an embodiment of the present invention.

The connecting pin 140 according to the present invention includes a first cylindrical hole 1010, a second cylindrical hole 1020, and a first projection hole 1040, a blocking portion 1050, a contact portion 1060, and a spring portion 1070.

The first projection hole 1040 is formed with a first cylindrical hole 1010 and a second cylindrical hole 1020 having a diameter larger than that of the first cylindrical hole 1010. The first cylindrical hole 1010, The two cylindrical holes 1020 are connected to each other in a penetrating manner and penetrated in the direction of the mounting groove 135 to open one side.

The screw thread 1030 is formed in a two-row threaded manner on the end inner diameter wall surface through which the second cylindrical hole 1020 is passed through the other side in the circumferential outward direction of the support rod.

The blocking portion 1050 is fixed to the open end of the second cylindrical hole 1232 by screwing the thread 1030 in a two-line threaded manner.

The contact portion 1060 is inserted through the second cylindrical hole 1020. One end of the smaller diameter protrudes through the first cylindrical hole 1010 and the other of the larger diameter jaws is inserted into the second cylindrical hole 1020 And does not pass through the first cylindrical hole 1010 and moves linearly in the second cylindrical hole 1020 along the longitudinal direction.

Here, one end of the contact portion 1060 having a small diameter may be formed by mixing any one of a blade shape or a tapered shape or a blade shape and a tapered shape.

The spring portion 1070 is inserted into the second cylindrical hole 1020 and is installed inside the second cylindrical hole 1020 by the blocking portion 1050 and exerts an elastic force on the jaw portion of the contact portion 1060, (1060) in the direction of the opening of the first cylindrical hole (1010) toward the mounting groove (135). The gasket 150 is fixed to the inner surface of the support base 130 which has a circular arc shape and is formed around the contact point 1060 protruding in the direction of the mounting groove 135 of the support base 130.

Therefore, even if the sharpness of the end portion of the connection pin 140 becomes dull or the contact position is fluctuated or deviated due to a long use time or due to the own weight of the electric wire 10 and vibration applied from the outside, the reliability of the contact is continuously maintained, There is an advantage that contact resistance for PLC communication is reduced.

Fig. 7 is a side sectional view for explaining the configuration of the pushing portion according to the embodiment of the present invention. Fig.

Referring to all the drawings, the lid portion 160 further includes a pressing portion 2000 at a portion where the lid portion 160 is in contact with the electric wire 10.

The pressing portion 2000 includes a pressing spring 2010 and a pressing plate 2020. [

The pressing spring 2010 is fixed at one end in the direction in which the pressing piece 162 presses the electric wire 10 while the pressing plate 2020 is fixed to the other end of the pressing spring 2010, ).

The average thickness of the pressing plate 2020 is set to a thickness corresponding to a value selected from a range of 1/2 to 1/3 of the maximum thickness value of the pressing piece 162, It is advantageous that the lid 160 can apply pressure to the surface of the wire 10 evenly.

That is, when the value is larger than 1/2, the pressure is concentrated on a part of the surface of the electric wire, so that the electric wire is irregularly collapsed so that the number of connection points or contact area The pressing plate 2020 is bent along the surface of the electric wire 10 to form the sheath 12 of the electric wire 10 as the sheath of the electric wire 10, Is not increased.

On the other hand, the thickness of the pressing plate 2000 preferably has a value selected from the range of 2 to 5 millimeters (mm). It is preferable for the pressure increase to use a thickness of 3 millimeters, And may be made of any one selected from among woods, metals, and stones, or a mixture of any selected materials. Here, the mixed material is preferably a structure in which each selected material is sliced and each material is strongly bonded by an industrial adhesive in an alternating state.

It is preferable that the thickness of the pressing piece 162 is doubled to correspond to the thickness value of the pressing plate 2020 and that the material thereof is made of the same material as the pressing plate 2020.

Therefore, when the lid 160 covers the electric wire 10, the pressing plate 2020, which receives the elastic force of the pressing spring 2010 while pressing the electric wire 10 in the direction of the supporting stand 130, 130). Therefore, even when a long period of time has elapsed or vibrations of various directions generated in the surroundings are applied, the electric wire 10 is firmly pressed and pressed so as not to be rocked.

Although the present invention has been described with reference to the accompanying drawings, it is to be understood that various changes and modifications may be made without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art.

10,20: Wire 11,21: Core wire
12: 22: cloth 110:
111: groove portion 113: fixed band
120: cover 121: hinge coupling part
122: engaging portion 123:
130: support base 131, 132, 133:
134: screw groove 135: mounting groove
136: Slit 140: Connection pin
141: Insertion tip 150: Gasket
160: lid part 161:
162: pressing piece 163:
164: fastening hole 165: screw
170: Lead wire

Claims (1)

And a plurality of latching grooves are formed on the opposite outer side surfaces of the mounting grooves so as to be spaced apart from one end toward the other end; A connection pin provided so as to protrude upward from the insertion tip in the mounting groove, the connection pin comprising a conductor; A gasket fitted to the insertion tip to be installed in the mounting groove such that the insertion tip protrudes upward; And a plurality of latching grooves, the end of which is selectively detachably attached to the other end of the support rod while wrapping the electric wire located on the connection pin in a state of being selectively engaged with the plurality of engagement grooves, thereby pressing the electric wire, A cover which penetrates through the cover so as to be brought into contact with the core wire and which allows the gasket to adhere to the penetration portion of the cover by the insertion tip for sealing; Wherein the body is fixed to a side of the support, and a groove is formed in the body so as to allow the electric wire to pass therethrough so as to be opened upward and forward and backward, and a cover is coupled to the upper side of the body so as to open and close the groove, Wherein the CT unit is provided with a CT so as to allow current measurement for the main body, and the support is formed with a slit between the main body and the main body such that the cover is inserted to engage with the latching groove, Wherein each of the engagement grooves is formed along a radial direction with respect to a center of curvature of the mounting groove, and the connection pins are provided in the support base in a plurality of widthwise directions, and the gasket is provided in each of the engagement pins, And the lid part is formed with a hook part at one end so as to be caught by any one of the plurality of latching grooves A probe unit for a pneumatic transformer in which a pressing piece is fixed to a central portion to provide a pressing force by surface contact with the electric wire and the other end is hinged to a fastening member for fastening with screws or bolts,
The connecting pin
A first cylindrical hole having one end opened in a mounting groove direction and a cylindrical shape and a second cylindrical hole having a diameter larger than the diameter of the first cylindrical hole are formed and each of the first cylindrical hole and the second cylindrical hole is connected A first projection hole penetrating the support base in a mounting groove direction;
A threaded portion formed at the open end of the second cylindrical hole and in the inner diameter portion in a two-line threading manner;
A blocking portion provided at an open end of the second cylindrical hole by screwing the thread in a two-row threading manner;
The one end of the small diameter inserted through the second cylindrical hole protrudes in the direction of the mounting groove through the first cylindrical hole and the other of the jaws having a large diameter is inserted into the second cylindrical hole, A contact portion that does not pass through the hole and moves linearly along the longitudinal direction in the second cylindrical hole; And
A spring portion inserted in the second cylindrical hole and installed in the second cylindrical hole by the blocking portion to apply an elastic force to the jaw portion of the contact portion to move the contact portion in the direction of opening the first cylindrical hole; , ≪ / RTI &
An end portion of the contact portion forms a blade shape,
The lid portion further includes a pressing portion at a portion in contact with the electric wire,
The pressing portion includes a pressing spring and a pressing plate,
The pressing spring is fixed at one end in a direction in which the pressing piece presses the wire,
The pressing plate is fixed to the other end of the pressing spring while receiving the elastic force of the pressing spring,
Wherein the average thickness of the pressing plate is a thickness corresponding to 1/2 of the maximum thickness value of the pressing piece, and the average thickness of the pressing plate is 3 millimeters.

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