Current and voltage monitoring apparatus for a transformer for preventing drop wire damage

Abstract

A current and voltage monitoring device for a transformer is provided, capable of transmitting a low current and voltage converted from the current flowing through the secondary down line of a transformer in a utility pole to a meter. The monitoring device includes: i) a current conversion unit that wraps the down line so that the secondary down line of the transformer penetrates inside, converts the current flowing through the down line into a low current with a reduced numerical value, and transmits it to an external meter; ii) a probe pin that contacts the conductor of the down line to transmit the voltage of the conductor to the meter; and iii) a fastening unit that selectively fixes the down line to prevent it from detaching from the current conversion unit, and contacts the conductor to the probe pin when fixing the down line. The current conversion unit includes: i) a mounting bracket for mounting the down line; ii) a support bracket that wraps the lower side of the down line at a predetermined distance; and iii) a cover bracket that wraps the upper side of the down line at a predetermined distance and is rotatably connected to the support bracket.

Description

Technology Field

[0001] The present invention relates to a current and voltage monitoring device for a transformer. More specifically, the present invention relates to a current and voltage monitoring device for a transformer capable of transmitting a low current and voltage, converted from the current flowing through the secondary down line of a transformer on a utility pole, to a meter. Background Technology

[0002] Wireless load monitoring devices and DCU voltage probes used to monitor the overload of existing overhead transformers are configured by inserting a needle into the wire. While the pin inserting the needle into the wire comes into contact with the wire's conductor, there is currently no device to secure the wire and the probe pin. Consequently, the wire shakes during operation, causing poor contact between the probe point and the conductor, making it impossible to acquire stable voltage information.

[0003] In addition, the probe pins of the monitoring device are formed from materials such as stainless steel, and since their material differs from that of the wire conductor, corrosion progresses due to aging, which presents a problem in that voltage information cannot be accurately acquired.

[0004] In addition, the current transformer (CT) of the DCU probe differs in its current transformation method using the Rogowski method, making it impossible to use in the AMIGO meter, which has enhanced features such as real-time measurement of recent electricity usage, provision of electricity usage information, protection of personal information, and prevention of hacking such as intrusion into the power grid.

[0005] Therefore, it is necessary to develop dedicated equipment for a transformer monitoring device utilizing AMIGO for utility pole transformers to acquire current and voltage information from the transformer and send the acquired current and voltage values ​​to an AMIGO meter to check the transformer overload and the condition of the wires. Prior art literature

[0006] Korean Registered Patent No. 1,548,178 The problem to be solved

[0007] The present invention aims to provide a transformer current and voltage monitoring device that fixes the secondary down line of a transformer in a utility pole and transmits the converted low current and voltage flowing through the down line to a meter to check whether the transformer is in a normal or abnormal state, such as overload. means of solving the problem

[0008] A current and voltage monitoring device for a transformer according to one embodiment of the present invention can transmit a low current and voltage, converted from the current flowing through the secondary down line of a transformer on a utility pole, to a meter. The monitoring device includes: i) a current conversion unit that wraps the down line so that the secondary down line of the transformer penetrates inside, converts the current flowing through the down line into a low current with a reduced numerical value, and transmits it to an external meter; ii) a probe pin that contacts the conductor of the down line to transmit the voltage of the conductor to the meter; and iii) a fastening unit that selectively fixes the down line to prevent it from detaching from the current conversion unit, and contacts the conductor to the probe pin when fixing the down line. The current conversion unit includes: i) a mounting bracket for mounting the down line; ii) a support bracket that wraps the lower side of the down line at a predetermined distance; and iii) a cover bracket that wraps the upper side of the down line at a predetermined distance and is rotatably connected to the support bracket.

[0009] The support bracket includes a first conductor whose ends extend upward from the lower portion and extend along the interior of the support bracket, exposed on the upper surface of both ends of the support bracket. The cover bracket includes a second conductor whose ends extend downward from the upper portion and extend along the interior of the cover bracket, exposed on the lower surface of both ends of the cover bracket. When the cover bracket is rotated to be spaced apart from the support bracket, the down line can be mounted on the mounting bracket. When the cover bracket is rotated to contact the support bracket, the second conductor contacts the first conductor and conducts current.

[0010] The probe pin is positioned extending upward through the mounting bracket so as to be located below the downline when the downline is mounted on the mounting bracket. The fastening unit is positioned within the support bracket so as to be located above the downline; a portion is fastened to be fixed to the support bracket, while the other portion presses the downline downward to cause the probe pin to penetrate the sheath of the downline and come into contact with the conductor wire.

[0011] A current and voltage monitoring device for a transformer according to one embodiment of the present invention further includes a damper unit for preventing oscillation and damage to a down line mounted on a current conversion unit. The damper unit includes i) a base damper positioned on a support bracket and supporting to surround the lower part of the down line, and ii) an upper damper positioned on the lower side of a fastening unit and supporting the upper part of the down line. A barrier portion is formed in the base damper to surround the side of the down line to prevent oscillation of the down line.

[0012] The probe pin extends from the support bracket through the base damper and protrudes upward from the base damper. The fastening unit presses the down line downward through the upper damper, causing the probe pin protruding upward from the base damper to penetrate the sheath of the down line and come into contact with the conductor line.

[0013] The fastening unit includes i) an outer nut having screw threads formed on its inner surface, and ii) an inner nut having a threaded portion formed on its outer surface that meshes with the screw threads, which is inserted into the outer nut and rotated to move up or down. The outer nut is detachably fastened to a support bracket and, when fastened to the support bracket, applies primary downward pressure to the down line. When the inner nut is rotated to move down within the outer nut, it applies secondary downward pressure to the down line, causing the probe pin to penetrate the sheath of the down line and come into contact with the conductor wire.

[0014] A guide portion into which an outer nut is inserted and fastened is formed on the inner surface of both ends of the support bracket. A flange is formed on the outer surface of the outer nut, protruding outward and fastened to the guide portion.

[0015] Multiple guide sections are provided. The multiple guide sections are arranged vertically on the inner surfaces of both ends of the support bracket. The flange of the outer nut is selectively fastened to any one of the multiple guide sections.

[0016] A support bracket is formed with a bulkhead portion that is disposed between a plurality of guide portions and provides a bulkhead inclined surface that protrudes inwardly at an angle in one direction from the inner surface of the support bracket. The flange of the outer nut rotates in one direction to slide along the bulkhead inclined surface, engages with the bulkhead portion, and is fastened to the guide portion.

[0017] The upper damper includes i) a base that supports to surround the upper part of the lower line, and ii) a fastening rod that extends upward from the base and has a plurality of fastening tips formed at the upper end. The inner nut includes a wrench hole forming part that forms a wrench hole into which a wrench is inserted inside the upper part, and a fastening hole formed at the lower end through which the fastening rod passes and the fastening tip is mounted.

[0018] In the upper damper, a stepped portion is formed that provides a stepped inclined surface protruding upwardly and inclinedly in one direction from the base. In the lower portion of the inner nut, a locking portion is formed that protrudes downwardly in a shape corresponding to the stepped portion. The inner nut is allowed to rotate in the other direction so as to descend within the outer nut as the locking portion slides along the stepped inclined surface. The inner nut is prevented from rotating in one direction so as to ascend within the outer nut as the locking portion engages with the stepped portion.

[0019] The base damper is formed from TPU (thermoplastic polyurethane) material. The upper damper is formed from LDPE (low density polyethylene) or PP (Polypropylene) material.

[0020] A current and voltage monitoring device for a transformer according to one embodiment of the present invention further includes a cable connecting a first conductor and a probe pin to conduct electricity with a meter.

[0021] The current conversion unit converts the current of the down line by a factor of 1 / 120 and transmits it to the meter. Effects of the invention

[0022] It secures the secondary down line of the utility pole's transformer and can transmit the converted low current and voltage flowing through the secondary down line to the meter. By monitoring the current and voltage transmitted to the meter, it is possible to verify whether the transformer is in a normal or abnormal state, such as overload. It can simultaneously perform the functions of both a metering current transformer and a metering transformer. The down line can be easily connected to and disconnected from the monitoring device. Simply connecting the down line to the monitoring device allows it to make contact with the conductor wire to ensure current and voltage flow. By securing the down line, it prevents it from swaying due to external factors such as wind. It also prevents damage to the down line during the securing process. Installation time for the monitoring device is reduced, and the installation method is simplified. Worker safety is ensured because the monitoring device is installed on the secondary down line with the current transformer. It improves construction quality by preventing poor contact and corrosion of the probe pins. Brief explanation of the drawing

[0023] FIG. 1 is a perspective view of a monitoring device with a lowering line connected according to one embodiment of the present invention. Figure 2 is an exploded perspective view of the configuration of the monitoring device of Figure 1. Figure 3 is a drawing showing the current conversion unit and damper unit of the monitoring device of Figure 1. Figure 4 is a side cross-sectional view of the monitoring device of Figure 1. FIGS. 5 and 6 are drawings showing the fastening unit and damper unit of the monitoring device of FIG. 1. Figures 7 and 8 are drawings showing the down line being connected to the current conversion unit and the damper unit by the connecting unit of the monitoring device of Figure 1. Specific details for implementing the invention

[0024] The technical terms used herein are for the reference of specific embodiments only and are not intended to limit the invention. The singular forms used herein include plural forms unless phrases clearly indicate otherwise. The meaning of "comprising" as used in the specification specifies a particular characteristic, area, integer, step, action, element, and / or component, and does not exclude the presence or addition of other particular characteristic, area, integer, step, action, element, component, and / or group.

[0025] Unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as generally understood by those skilled in the art to which this invention pertains. Terms defined in commonly used dictionaries are further interpreted to have meanings consistent with relevant technical literature and the present disclosure, and are not interpreted in an ideal or highly formal sense unless otherwise defined. For example, the term “applied” described below is interpreted to include both the state in which it is appropriately used and the state prior to appropriate use.

[0026] Expressions described in the singular in this specification may be interpreted as singular or plural unless explicit expressions such as "one" or "single" are used.

[0027] In this specification, terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but said components are not limited by said terms. Such terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present disclosure, the first component may be named the second component, and similarly, the second component may be named the first component.

[0028] In the flowchart described with reference to the drawings in this specification, the order of operations may be changed, several operations may be merged or some operations may be divided, and certain operations may not be performed.

[0029] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein.

[0030] FIGS. 1 to 4 are schematic diagrams showing the shape of a current and voltage monitoring device (10) of a transformer (hereinafter referred to as the monitoring device (10)) according to an embodiment of the present invention. Specifically, FIG. 1 shows the overall appearance of the monitoring device (10), FIGS. 2 and FIGS. 3 show the configuration of the monitoring device (10), and FIG. 4 shows a side cross-sectional view of the monitoring device (10). The monitoring device (10) of FIGS. 1 to 4 is merely for illustrating the present invention and is not limited thereto. Accordingly, it may be modified differently.

[0031] As illustrated in FIG. 1, the monitoring device (10) can fix the secondary down line (W) of the transformer (T) of the utility pole (P) and transmit the converted low current and voltage flowing through the secondary down line (W) to an external meter (M). The user can determine whether the transformer (T) is in a normal or abnormal state, such as overload, by identifying the current and voltage transmitted to the meter (M). Meanwhile, the meter (M) connected to the monitoring device (10) in this embodiment includes an AMIGO meter (M) with enhanced functions for measuring electricity usage in real time, providing electricity usage information, protecting personal information, and blocking hacking such as intrusion into the power grid.

[0032] As illustrated in FIGS. 1 to 4, the monitoring device (10) transmits a low current and voltage, converted to a lower numerical value, to a meter (M) and includes a current conversion unit (100), a probe pin (200), a fastening unit (300), a damper unit (400), and a cable (500).

[0033] The current conversion unit (100) wraps around the down line (W) so that the secondary down line (W) of the transformer (T) penetrates inside, converts the current flowing through the down line (W) into a low current with a reduced numerical value, and transmits it to an external meter (M) through a cable (500). For example, the first conductor (121) and the second conductor (131) inside the current conversion unit (100) form an annular closed circuit to convert the current flowing through the down line (W) into a low current with a lower numerical value and transmit it to the meter (M) through the cable (500). That is, the current conversion unit (100) of this embodiment functions as a current transformer (CT).

[0034] The current conversion unit (100) converts the current of the down line (W) by a factor of 1 / 120 and transmits it to the meter (M) through the cable (500). For example, the current conversion unit (100) converts the 600A current of the secondary down line (W) to 5A and transmits it to the meter (M) through the cable (500). The current conversion unit (100) includes a mounting bracket (110), a support bracket (120), a cover bracket (130), and a hinge part (140).

[0035] The mounting bracket (110) supports the lowering line (W). For example, the mounting bracket (110) extends upward on both sides from the support bracket (120) and wraps around the side of the lowering line (W) to make contact. A through hole (111) through which a probe pin (200) passes is formed on the lower surface of the mounting bracket (110).

[0036] The support bracket (120) wraps around the lower side of the lower line (W) at a predetermined distance. For example, the support bracket (120) has a “C” shape with an open top, with both ends extending upward from the lower end. The support bracket (120) includes a first conductor (121), and a guide portion (122) and a partition portion (123) are formed in the support bracket (120).

[0037] The first conductor (121) extends along the interior of the support bracket (120) and is exposed on the upper surface of both ends of the support bracket (120). That is, the first conductor (121) is positioned inside the support bracket (120) in a shape corresponding to that of the support bracket (120), and both ends of the first conductor (121) are exposed on the upper surface of both ends of the support bracket (120). The first conductor (121) includes an iron core through which electricity is conducted.

[0038] When the first conductor (121) is rotated so that the cover bracket (130) contacts the support bracket (120), the second conductor (131) inside the cover bracket (130) contacts the first conductor (121) and conducts electricity. That is, when the cover bracket (130) is rotated so that it contacts the support bracket (120), the first conductor (121) and the second conductor (131) form an annular closed circuit, converting the current flowing through the down line (W) into a low current with a lower numerical value.

[0039] Meanwhile, the guide portion (122) and bulkhead portion (123) of the support bracket (120) will be described later together with the fastening unit (300) and damper unit (400) of FIGS. 5 and 6.

[0040] As illustrated in FIGS. 1 to 4, the cover bracket (130) wraps around the upper side of the lower line (W) at a predetermined distance. For example, the cover bracket (130) has a “C” shape with an open bottom, with both ends extending downward from the upper end.

[0041] The cover bracket (130) is rotatably connected to the support bracket (120) via a hinge portion (140). That is, when the cover bracket (130) is rotated upward so as to be spaced apart from the support bracket (120), the down line (W) can be mounted on the mounting bracket (110). When the down line (W) is mounted on the mounting bracket (110), the cover bracket (130) can be rotated downward so as to contact the support bracket (120) to secure the down line (W).

[0042] The cover bracket (130) includes a second conductor (131). The second conductor (131) extends along the interior of the cover bracket (130) and is exposed on the lower surface of both ends of the cover bracket (130). That is, the second conductor (131) is positioned inside the cover bracket (130) in a shape corresponding to that of the cover bracket (130), and both ends of the second conductor (131) are exposed on the lower surface of both ends of the cover bracket (130). The second conductor (131) includes an iron core through which electricity is conducted.

[0043] When the cover bracket (130) is rotated to contact the support bracket (120), the second conductor (131) contacts the first conductor (121) within the support bracket (120) and conducts current. That is, when the cover bracket (130) is rotated to contact the support bracket (120), the first conductor (121) and the second conductor (131) form an annular closed circuit, converting the current flowing through the down line (W) into a low current with a lower numerical value. The first conductor (121) and the second conductor (131) are electrically connected to the cable (500).

[0044] As illustrated in FIGS. 3 and 4, the probe pin (200) contacts the conductor wire (W1) of the down line (W) to transmit the voltage of the conductor wire (W1) to the meter (M) through the cable (500). The probe pin (200) has the shape of a pin extending in the vertical direction and is electrically connected to the cable (500). That is, the probe pin (200) of this embodiment functions as a potential voltage transformer (T) (PT). The probe pin (200) is formed of a brass material that facilitates current conduction, just like the conductor wire (W1) of the down line (W).

[0045] The probe pin (200) is positioned to extend upward through the through hole (111) of the mounting bracket (110) so as to be located on the lower side of the down line (W) when the down line (W) is mounted on the mounting bracket (110). Additionally, the probe pin (200) is extended from the support bracket (120) to protrude upward from the base damper (410) by passing through the through hole (412) of the base damper (410) of the damper unit (400). The down line (W) is pressed downward by the fastening unit (300), and the probe pin (200) penetrates the sheath (W2) of the down line (W) and contacts the conductor line (W1). The configuration in which the fastening unit (300) presses the down line (W) downward will be described later.

[0046] The cable (500) connects the first conductor (121) and the probe pin (200) to the meter (M) to conduct electricity. That is, the cable (500) is electrically connected to the first conductor (121), the second conductor (131), and the probe pin (200), and extends downward from the support bracket (120) to connect to the meter (M). Meanwhile, the cable (500) is also electrically connected to the terminal block TTB prior to the meter (M).

[0047] FIGS. 5 and 6 are schematic drawings showing the shapes of the fastening unit (300) and the damper unit (400) of the monitoring device (10). That is, FIGS. 5 and 6 show the configuration of the fastening unit (300) and the damper unit (400). The fastening unit (300) and the damper unit (400) of FIGS. 5 and 6 are merely for illustrating the present invention and are not limited thereto. Therefore, they can be modified differently.

[0048] As illustrated in FIGS. 3 to 6, the fastening unit (300) selectively secures the down line (W) to prevent the down line (W) from detaching from the current conversion unit (100). The fastening unit (300) is positioned within a support bracket (120) so as to be located above the down line (W).

[0049] The fastening unit (300) contacts the conductor wire (W1) with the probe pin (200) when fixing the down wire (W). For example, the fastening unit (300) presses the down wire (W) downward through the upper damper (420) to make the probe pin (200), which protrudes above the base damper (410), contact the conductor wire (W1) by penetrating the sheath (W2) of the down wire (W). The fastening unit (300) includes an outer nut (310) and an inner nut (320).

[0050] The outer nut (310) is detachably fastened to the guide portion (122) of the support bracket (120), and when fastened to be fixed to the guide portion (122), it first presses the lower line (W) downward through the upper damper (420). On the outer surface of the outer nut (310), a flange (312) is formed that protrudes outward and is fastened to the guide portion (122) of the support bracket (120).

[0051] Referring again to FIGS. 3 and FIGS. 5, a guide portion (122) into which an outer nut (310) is inserted and fastened is formed on the inner surface of both ends of the support bracket (120). A plurality of guide portions (122) are provided, and the plurality of guide portions (122) are arranged in an up-and-down direction on the inner surface of both ends of the support bracket (120).

[0052] The flange (312) of the outer nut (310) is selectively fastened to one of the plurality of guide parts (122). That is, the flange (312) of the outer nut (310) can be selectively fastened in the up and down direction to fit the lowering line (W) having various sizes and thicknesses.

[0053] In the support bracket (120), a partition section (123) is formed that is disposed between a plurality of guide sections (122) and provides a partition inclined surface (123a) that protrudes inwardly in a unidirectional manner from the inner surface of the support bracket (120).

[0054] The flange (312) of the outer nut (310) is rotated in one direction (e.g., clockwise) so as to slide along the inclined surface (123a) of the bulkhead portion (123), and is engaged with the bulkhead portion (123) and fastened to the guide portion (122). In this way, as the flange (312) of the outer nut (310) is fastened to the guide portion (122), the lower line (W) is first pressed downward through the upper damper (420). A screw thread (311) is formed on the inner surface of the outer nut (310), and the screw thread (311) engages with the screw portion (321) of the inner nut (320).

[0055] As illustrated in FIGS. 4 to 6, the inner nut (320) has a threaded portion (321) formed on its outer surface that engages with the threads (311) of the outer nut (310), and is inserted into the outer nut (310) and rotated to rise or fall.

[0056] When the inner nut (320) is rotated to descend within the outer nut (310), the lowering line (W) is secondarily pressed downward through the upper damper (420) so that the probe pin (200) penetrates the sheath (W2) of the lowering line (W) and contacts the conductor line (W1).

[0057] The inner nut (320) includes a wrench hole forming part (322) that forms a wrench hole (322a) into which a wrench is inserted on the upper side. A separate wrench is inserted into the wrench hole (322a) of the wrench hole forming part (322) to rotate the inner nut (320) so that it rises or falls within the outer nut (310). A fastening hole (323) and a locking part (324) are formed on the lower part of the inner nut (320), and a detailed description thereof will be provided later.

[0058] Meanwhile, the mounting bracket (110), support bracket (120), and cover bracket (130) of the current conversion unit (100), and the outer nut (310) and inner nut (320) of the fastening unit (300) are formed of PA6 plastic material containing a UV blocking agent.

[0059] As illustrated in FIGS. 3 to 6, the damper unit (400) prevents oscillation and damage to the down line (W) mounted on the current conversion unit (100). That is, the damper unit (400) fixes the down line (W) to prevent the down line (W) from oscillating due to external wind or the like, and prevents the down line (W) from being damaged when the fastening unit (300) presses the down line (W) downward. The damper unit (400) includes a base damper (410) and an upper damper (420).

[0060] The base damper (410) is positioned on the upper surface of the lower part of the support bracket (120) and supports the lower part and side of the down line (W). A barrier part (411) is formed in the base damper (410) to surround the side of the down line (W) to prevent oscillation of the down line (W). That is, the mounting bracket (110) of the current conversion unit (100) supports the side of the down line (W), the base damper (410) supports the lower part of the down line (W), and the barrier part (411) supports the side of the down line (W) from the front of the mounting bracket (110). A through hole (412) through which a probe part passes is formed in the base damper (410).

[0061] The base damper (410) is formed from a thermoplastic polyurethane (TPU) material, which is a thermoplastic polyurethane elastomer. TPU is a plastic with rubber elasticity and is a material that possesses the best mechanical properties among thermoplastic elastomers, such as tensile strength, tear strength, and wear resistance. Therefore, the base damper (410) is flexible enough to wrap around a pull line (W) of various sizes and thicknesses, prevents the pull line (W) from swaying, and has high shock absorption capacity. Meanwhile, the base damper (410) can be formed from a material other than TPU.

[0062] As illustrated in FIGS. 4 to 6, the upper damper (420) is positioned on the lower side of the fastening unit (300) and supports to cover the upper part of the lower line (W). The upper damper (420) includes a base (421) and a fastening rod (422), and a stepped portion (423) is formed.

[0063] The base (421) supports the upper portion of the lower line (W) by wrapping around it. That is, the lower surface of the base (421) has a curved shape corresponding to the upper surface of the lower line (W). A stepped portion (423) is formed on the upper surface of the base (421) to engage with the locking portion (324) of the inner nut (320), and a detailed explanation thereof will be provided later.

[0064] The fastening rod (422) extends upward from the base (421), and a plurality of fastening tips (422a) are formed at the upper end. The inner nut (320) has a fastening hole (323) formed at the lower end through which the fastening rod (422) passes and the fastening tips (422a) are mounted. That is, the fastening tips (422a) of the fastening rod (422) are mounted in the fastening hole (323) of the inner nut (320) when the inner nut (320) rotates downward within the outer nut (310).

[0065] The step portion (423) provides a step inclined surface (423a) that protrudes upward in an inclined direction from the base (421). At the lower end of the inner nut (320), a sawtooth-shaped locking portion (324) is formed that protrudes downward in a shape corresponding to the step portion (423) of the upper damper (420).

[0066] The inner nut (320) is allowed to be rotated in the other direction (e.g., counterclockwise) so as to descend within the outer nut (310) as the locking portion (324) slides along the stepped inclined surface (423a) of the stepped portion (423) of the upper damper (420). In this case, when the inner nut (320) is rotated to descend within the outer nut (310), the lowering line (W) is secondarily pressed downward through the upper damper (420) to cause the probe pin (200) to penetrate the sheath (W2) of the lowering line (W) and come into contact with the conductor line (W1).

[0067] Conversely, the inner nut (320) is prevented from rotating in one direction (e.g., clockwise) upward within the outer nut (310) as the locking portion (324) engages with the stepped portion (423) of the upper damper (420). That is, the inner nut (320) is prevented from rotating downward in a counterclockwise direction within the outer nut (310) and engaging with the stepped portion (423), and is prevented from rotating in a clockwise direction again, thereby preventing it from being released from the outer nut (310).

[0068] Accordingly, the outer nut (310) is fastened to the guide portion (122) of the support bracket (120) to first press the down line (W) downward through the upper damper (420), and the inner nut (320) presses the down line (W) downward through the upper damper (420) to secondarily press the down line (W) and firmly fix the down line (W), and the probe pin (200) penetrates the sheath (W2) of the down line (W) and comes into contact with the conductor wire (W1).

[0069] Additionally, when the inner nut (320) is rotated to descend within the outer nut (310), the inner nut (320) does not directly contact and press the lower line (W), but rather presses the lower line (W) downward through the upper damper (420), so that the upper surface of the lower line (W) is prevented from being damaged by the inner nut (320).

[0070] The upper damper (420) is formed from LDPE (low density polyethylene) or PP (polypropylene) material. LDPE is a synthetic resin manufactured by polymerizing ethylene into low-density polyethylene. LDPE has high flexibility and transparency. PP is a thermoplastic resin manufactured by polymerizing propylene into a solid. PP has excellent tensile strength, impact strength, and surface strength, and has high heat resistance and chemical resistance. In addition, among plastics, it is the lightest, has high mechanical strength, and has excellent heat resistance. Therefore, when the upper damper (420) is pressed downward by contact with the inner nut (320) of the fastening unit (300), the surface of the lower line (W) is prevented from being damaged, and the durability of the upper damper (420) itself can be maintained.

[0071] FIGS. 7 and 8 are schematic diagrams showing the appearance of a down line (W) being connected to a monitoring device (10). Specifically, FIGS. 7 and 8 show the down line (W) being connected to a current conversion unit (100) and a damper unit (400) by a connecting unit (300). The method of connecting the down line (W) in FIGS. 7 and 8 is merely for illustrating the present invention and is not limited thereto. Therefore, it can be modified differently.

[0072] As shown in FIGS. 7 and 8, in order to attach the down line (W) to the monitoring device (10), the cover bracket (130) is rotated upward so as to be spaced apart from the support bracket (120), and the down line (W) is mounted on the mounting bracket (110) and the base damper (410).

[0073] Meanwhile, the upper damper (420) and the outer nut (310) and inner nut (320) of the fastening unit (300) may be provided in a combined state so that the user can easily fasten the lowering line (W) to the monitoring device (10).

[0074] When the lowering line (W) is connected to the mounting bracket (110) and the base damper (410), the outer nut (310) of the connecting unit (300) is connected to the guide portion (122) of the supporting bracket (120) by rotating it clockwise. In this case, the outer nut (310) first presses the lowering line (W) downward through the upper damper (420).

[0075] A wrench is inserted into the wrench hole (322a) of the inner nut (320) to rotate the inner nut (320) so that it descends within the outer nut (310), thereby fixing the lowering line (W) by applying a second downward pressure through the upper damper (420), and the probe pin (200) penetrates the sheath (W2) of the lowering line (W) to contact the conductor line (W1).

[0076] Referring again to FIGS. 1 and 2, the cover bracket (130) is rotated downward so as to contact the support bracket (120), thereby contacting and energizing the first conductor (121) of the support bracket (120) and the second conductor (131) of the cover bracket (130) to form an annular closed circuit. The current conversion unit (100) converts the current flowing through the down line (W) into a low current of a lower numerical value and transmits it to the meter (M) through the cable (500). That is, the current conversion unit (100) converts the current of the down line (W) by a factor of 1 / 120, for example, a current of 600A to 5A, and transmits it to the meter (M) through the cable (500). In addition, the voltage of the conductor line (W1) is transmitted to the meter (M) through the cable (500) by the probe pin (200). That is, the monitoring device (10) can transmit a lower current and voltage, converted to a lower value, to the meter (M) for the current flowing through the secondary down line (W) of the transformer (T). The user can determine whether the transformer (T) is in a normal or abnormal state, such as overload, by identifying the current and voltage transmitted to the meter (M).

[0077] Although the present invention has been described as previously stated, those skilled in the art will readily understand that various modifications and variations are possible without departing from the concept and scope of the claims set forth below. Explanation of the symbols

[0078] 10. Monitoring device 100. Current conversion unit 110. Mounting bracket 111. Penetrating hole 120. Support bracket 121. First conductor 122. Guide Section 123. Bulkhead 123a. Bulkhead slope 130. Cover bracket 131. Second conductor 140. Hinge part 200. Probe pin 300. Fastening Unit 310. Outer nut 311. Screw threads 312. Flange 320. Inner Nut 321. Screw section 322. Wrench hole forming part 322a. Wrench hole 323. Fastening hole 324. Hook 400. Damper Unit 410. Bass Damper 411. Barrier section 412. Through hole 420. Upper damper 421. Bass 422. Fastening rod 422a. Fastening tip 423. Step 423a. Step slope 500. Cable P. Jeonju T. Transformer W. Inhaseon W1. Conductor wire W2. Covering M. Meter

Claims

Claim 1 A current conversion unit that wraps the down line so that the secondary down line of the transformer penetrates internally, converts the current flowing through the down line into a low current with a reduced numerical value, and transmits it to an external meter; a probe pin that contacts the conductor of the down line to transmit the voltage of the conductor to the meter; and a fastening unit that selectively fixes the down line to prevent it from detaching from the current conversion unit and contacts the conductor to the probe pin when fixing the down line, wherein the current conversion unit includes a mounting bracket for mounting the down line, a support bracket that wraps the lower side of the down line at a predetermined distance, and a cover bracket that wraps the upper side of the down line at a predetermined distance and is rotatably connected to the support bracket, and further includes a damper unit that prevents oscillation and damage to the down line mounted on the current conversion unit, wherein the damper unit is disposed on the support bracket and includes a base damper that supports to wrap the lower part of the down line, and It includes an upper damper disposed on the lower side of the above-mentioned fastening unit and supporting the upper part of the lowering line, wherein the probe pin extends from the support bracket through the base damper and protrudes upward from the base damper, and the fastening unit presses the lowering line downward through the upper damper so that the probe pin protruding upward from the base damper penetrates the sheath of the lowering line and contacts the conductor line, wherein the base damper has a barrier portion formed thereon that surrounds the side of the lowering line to prevent oscillation of the lowering line, and the fastening unit includes an outer nut having screw threads formed on its inner surface, and an inner nut having a screw portion formed on its outer surface that meshes with the screw threads, and which is inserted into the outer nut and rotates to rise or fall, wherein the outer nut is detachably fastened to the support bracket and, when fastened to the support bracket, primarily presses the lowering line downward, and the inner nut is the When rotated to descend within the outer nut,A transformer current and voltage monitoring device that applies secondary downward pressure to the lowering line to cause the probe pin to penetrate the sheath of the lowering line and contact the conductor wire. Claim 2 A current and voltage monitoring device for a transformer according to claim 1, wherein the base damper is formed of TPU (thermoplastic polyurethane) material and the upper damper is formed of LDPE (low density polyethylene) or PP (Polypropylene) material.

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