KR102380282B1 - Apparatus for diagnosing leakage current and measuring insulation aging for transformer bushing using bushing adapter - Google Patents

Abstract

The present invention provides an apparatus for diagnosing a leakage current and measuring insulation aging for a transformer bushing using a bushing adaptor. The apparatus includes: an adapter including a tab branch portion branched in three directions and provided with a first body having a tab portion formed at a branch end, a tab coupling portion having a lower coupling tab formed on a lower end thereof to protrude upward from the first body and be electrically coupled to the first body, and having an upper coupling tab formed on an upper end thereof so that the upper end is electrically coupled to a bushing tab provided on one side of a transformer bushing, a leakage current diagnosis portion electrically coupled to the first body in orthogonal to the tab coupling portion and coupled in an 'L' shape to diagnose a leakage current, and an insulation aging measurement portion electrically coupled to the first body in orthogonal to the leakage current diagnosis portion to measure insulation aging; an insulation aging measurement device connected to each of the insulation aging measurement unit and a connector of the bushing connected to a transformer lead wire; and a leakage current diagnosis device connected to the leakage current diagnosis portion to diagnosis the leakage current of the bushing, wherein the tab branch portion, the tab coupling portion, the leakage current diagnosis portion, and the insulation aging measurement portion are provided with conductive member at the center of an inside of the leakage current diagnosis portion, and the insulation aging measurement portion, respectively, so that the leakage current diagnosis portion, and the insulation aging measurement portion are electrically connected and coupled to each other.

Description

Device for diagnosing leakage current and measuring insulation deterioration of transformer bushings using bushing adapters

The present invention relates to a device for both diagnosing leakage current and measuring insulation deterioration of a transformer bushing using a bushing adapter. It relates to a device for both diagnosing leakage current of a transformer bushing and measuring insulation deterioration using an improved bushing adapter to enable leakage current diagnosis and insulation deterioration measurement.

Recently, the use of ultra-high voltage equipment in the domestic power system is increasing, and the failure of a transformer among these equipment causes great social and economic damage such as large-scale power outages and fires.

The transformer transforms a high voltage into a low voltage for transmission and distribution, and a bushing for drawing out a terminal of a winding coil provided therein is installed on one side of the transformer to the outside.

In addition, the failure due to the natural deterioration of the bushing is continuously occurring at least one per year.

In order to prevent such failure of bushings, the diagnosis methods of bushings include insulation deterioration measurement (once/3 years), insulation oil gas analysis (once/year), and leakage current diagnosis method, and a substation comprehensive preventive diagnosis system is established. Thus, the bushing leakage current is monitored in real time.

In addition, the transformer bushing leakage current diagnosis device is installed in the bushing of the power input transformer, and analyzes and diagnoses the insulation state of the bushing with the leakage current value changing in real time.

Such a transformer bushing leakage current diagnosis apparatus is shown in FIG. 1 .

Referring to FIG. 1 , the transformer bushing leakage current diagnosis device 20 is connected to an adapter 10 for diagnosing leakage current installed on a bushing tap provided on one side of the bushing 1 to change the real-time leakage current of the bushing 1 . Analyze and diagnose the insulation state of the bushing with the value.

And in FIG. 1 , the local unit 30 acquires and processes the signal data detected by the leakage current sensor (not shown).

In addition, the transformer whose leakage current is measured by the transformer bushing leakage current diagnosis device 20 of FIG. 1 is installed with a transformer bushing insulation degradation measuring device as shown in FIG. 2 for measuring insulation degradation of the bushing 1, and bushing insulation A degradation measurement is performed.

Referring to FIG. 2, the transformer bushing insulation deterioration measuring device includes an adapter for measuring insulation deterioration installed on the bushing tap of the bushing 1, and an insulation deterioration measuring device connected to the adapter for measuring insulation deterioration (10a) 40 ) is included.

And the method of measuring insulation deterioration of the bushing 1 through the transformer bushing insulation deterioration measuring apparatus of FIG. 2 is shown in FIG.

Referring to FIG. 3, first, in order to measure the insulation degradation, the adapter 10 for diagnosing leakage current of FIG. 1 is separated from the bushing tap (step 51).

Next, the adapter 10a for measuring insulation deterioration of FIG. 2 is installed on the bushing tab of the bushing 1. (Step 53)

And the insulation deterioration of the bushing is measured through the insulation deterioration measuring device 40 of the bushing 1 of FIG. 2 (step 55).

Also, after measuring the insulation deterioration of the bushing 10, the adapter 10a for measuring insulation deterioration is removed from the bushing tab (step 57).

Next, the adapter 10 for diagnosing leakage current is installed again on the bushing tab of the bushing 1. (Step 59)

As described above, the conventional method for measuring insulation deterioration of a bushing using a transformer bushing insulation deterioration measuring apparatus is performed by repeatedly performing the steps of FIG. 3 .

However, by repeating the steps as shown in FIG. 3, that is, by repeatedly separating and installing the adapters 10 and 10a, the screw threads of the bushing tab 1a of the bushing 1 may be damaged, so that the insulating oil may leak, There is a problem that leakage may cause insulation breakdown of the bushing (1) and even fire of the transformer.

In addition, since the separation and installation of the adapters 10 and 10a, which are unstable high-place work for measuring the insulation deterioration of the bushing 1, must be performed, the possibility of a safety accident increases.

In addition, an additional confirmation process of checking whether the adapter 10 for diagnosing leakage current is normally connected is required every time the adapter 10 is detached, thereby causing work inefficiency.

The present invention was created to solve the above problems, and it is a bushing that enables leakage current diagnosis and insulation deterioration measurement of a bushing by using an adapter that does not need to repeat the work of removing and installing the adapter from the bushing tab of the bushing. An object of the present invention is to provide a device for diagnosing leakage current of a transformer bushing using an adapter and measuring insulation deterioration.

A device for diagnosing leakage current and measuring insulation deterioration of a transformer bushing using the bushing adapter of the present invention for achieving the above object,

A tab branching part having a first body branched in three directions and having a tab part formed at the branching end, and a lower coupling tab protruding upward from the first body and electrically coupled to the first body are formed at the lower end of the transformer, A tab coupling portion having an upper coupling tab formed at the top portion so that the top portion is electrically coupled to the bushing tab provided on one side of the bushing, and electrically coupled to the first body to be orthogonal to the tab coupling portion to form an 'L' shape An adapter comprising: a leakage current diagnosis unit coupled to perform leakage current diagnosis; and an insulation deterioration measuring unit electrically coupled to the first body orthogonally to the leakage current diagnosis unit to measure insulation degradation; ;

an insulation deterioration measuring device connected to the insulation deterioration measuring unit and a connector of the bushing connected to the transformer lead wire, respectively, and measuring insulation deterioration of the bushing;

A leakage current diagnosis device connected to the leakage current diagnosis unit to diagnose the leakage current of the bushing;

The tab branching unit, the tab coupling unit, the leakage current diagnosis unit, and the insulation deterioration measuring unit are characterized in that a conductor member is provided at the center of each inside so that the electrical connection is made and coupled to each other.

In the present invention, doedoe electrically coupled to the insulation deterioration measuring unit, and detachably coupled to further include a protection unit protecting the insulation deterioration measuring unit, wherein the protection unit is electrically coupled to the insulation deterioration measuring unit and has a hat shape And a waterproof cap made of; A short cap installed in the inner space of the waterproof cap and provided to be electrically connected to the insulation deterioration measuring unit, wherein the short cap includes: a case provided to be coupled to the third body; a fifth body installed in the case; and a fifth conductor member installed inside the fifth body and electrically connected to the third conductor member.

In the present invention, the tab coupling part is installed on the upper portion of the first body, the leakage current diagnosis part is installed on one side of the first body, the insulation deterioration measuring part and the protection part is a front surface of the first body installed in the department

In the present invention, a spacer occupying a certain space is formed at a coupling portion where the tap coupling unit and the leakage current diagnosis unit are coupled.

In the present invention, an elastic part formed as an empty space and resiliently provided therein is formed at the coupling end at which the tap coupling part and the conductor member of the leakage current diagnosis part are coupled to each other, and a conductor is formed in the empty space inside the elastic part. A spring is provided.

In the present invention, the leakage current diagnosis unit comprises: a connection member electrically connected to a side tab protruding from the first body; and a leakage current diagnosis member electrically connected to the other end of the connection member and provided with a connector to be connected to the leakage current diagnosis device so that the leakage current diagnosis is made at the other end thereof.

In the present invention, the connection member comprises: a fourth body having a fourth tab having one end connected to the side tab and a flange portion having the other end coupled to the leakage current diagnosis member; a fourth conductor member installed therein in the longitudinal direction of the fourth body; and a fourth insulating member installed between the fourth conductor member and the fourth body to insulate the fourth conductor member.

In the present invention, the leakage current diagnosis member comprises: a coupling body having one end coupled to the connecting member and the other end coupled to the connector; a protection circuit installed inside the coupling body, one end electrically connected to the fourth conductor member inside the connecting member, and the other end connected to the connector; and a filling insulating material filled inside the coupling body to surround and insulate the outside of the protection circuit.

In the present invention, the insulation deterioration measuring unit, one end is installed on the front portion of the inside of the first body, the third body is installed to protrude to the front portion; a third conductor member protruding parallel to the third body therein in the longitudinal direction of the third body to be connected to an insulation deterioration measuring device; wherein the third conductor member is electrically connected to the horizontal conductor member is connected, and an insulating member is installed between the third conductor member and the third body to achieve insulation.

According to an embodiment of the present invention, by applying a device for both diagnosing leakage current of a transformer bushing using a bushing adapter and measuring insulation deterioration, it is possible to measure insulation deterioration and diagnose leakage current of a bushing in the field without removing the adapter from the bushing.

Therefore, by improving the durability of the bushing, leakage of insulating oil is prevented as before, insulation breakdown of the bushing and fire of the transformer can be prevented, and the occurrence of safety accidents can be reduced.

In addition, work efficiency can be improved by shortening the adapter inspection process.

1 is a schematic diagram of a conventional transformer bushing leakage current diagnosis apparatus.
Figure 2 is a schematic diagram of a conventional transformer bushing insulation deterioration measuring device.
3 is a flowchart sequentially showing a method for measuring insulation deterioration of a bushing through a transformer bushing insulation deterioration measuring device.
4 is an overall configuration diagram of an apparatus for diagnosing leakage current and measuring insulation deterioration of a transformer bushing using a bushing adapter according to the present invention.
5 is a perspective view showing the overall configuration of an adapter for diagnosing leakage current and measuring insulation deterioration of the transformer bushing of FIG. 4;
Fig. 6 is a front view of Fig. 5;
Fig. 7 is a bottom view of Fig. 5;
Fig. 8 is a partial cross-sectional view of Fig. 6;
9 is a detailed exploded view in which the tab branching part and the tab coupling part are disassembled in FIG.
10 is a detailed exploded view in which the tab branch, the insulation deterioration measuring part, and the protection part are disassembled in FIG.
11 is a detailed sectional view of the leakage current diagnosis unit of FIG. 8;
12 is a plan view showing a state in which the adapter for diagnosing leakage current and measuring insulation deterioration of the bushing of FIG. 4 is installed on the transformer bushing;

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

4 is a block diagram showing the overall configuration of an apparatus for diagnosing leakage current of a transformer bushing and measuring insulation deterioration using a bushing adapter according to the present invention.

5 is a perspective view showing the overall configuration of the adapter for diagnosing leakage current and measuring insulation deterioration of the transformer bushing of FIG. 4 .

And, the front view of FIG. 5 is shown in FIG. 6, and the bottom view of FIG. 5 is shown in FIG.

In addition, FIG. 8 is a partial cross-sectional view of FIG. 6 , and FIG. 9 is a detailed exploded view of the tab branching part and the tab coupling part disassembled in FIG. 8 .

And, FIG. 10 is a detailed exploded view of the tab branching part, the insulation deterioration measuring part, and the protection part in FIG. 8 .

Also, FIG. 11 is a detailed sectional view of the leakage current diagnosis unit of FIG. 8 .

And, FIG. 12 is a plan view showing a state in which the adapter for diagnosing leakage current and measuring insulation deterioration of the transformer bushing of FIG. 4 is installed on the transformer bushing.

4 to 12, the apparatus for both diagnosing leakage current and measuring insulation deterioration of a transformer bushing using a bushing adapter according to the present invention includes an adapter 200 coupled to the bushing tab 1a of the bushing 1 and, It is configured to include a leakage current diagnosis device 20 connected to the adapter 200 , and an insulation deterioration measuring device 40 connected to the bushing 1 and the adapter 200 .

More specifically, the adapter 200 includes a tab branching part 230 having a first body 231 that is branched in three directions and having tab parts 237 and 239 formed at branching ends, and the tab branching part 230 . A lower coupling tab 251b is formed at the lower end so as to protrude upward and to be electrically coupled to the first body 231 of the first body 231 of the A tab coupling part 250 having an upper coupling tab 251a formed on the top part so that the top part is electrically coupled, and the first body 231 being electrically coupled to the first body 231 orthogonally to the tab coupling part 250, the 'L' shape It is configured to include a leakage current diagnosis unit 210 that is coupled to form a leakage current diagnosis unit.

In addition, the adapter 200 for both diagnosing leakage current of a transformer bushing and measuring insulation deterioration according to the present invention, in particular, as shown in FIGS. ) is electrically coupled to the body of an insulation deterioration measuring unit 270 provided to measure insulation deterioration, and electrically coupled to the insulation deterioration measuring unit 270 and detachably coupled to the insulation deterioration measuring unit 270 It is configured to include a protection unit 290 to protect the.

In addition, as shown in FIGS. 8 and 10, the tab branching unit 230, the tab coupling unit 250, the leakage current diagnosis unit 210, the insulation deterioration measuring unit 270 and the protection unit 290 are, Conductive members 215, 233, 235, 253, 277, and 297 are provided at the center of each inside so that electrical connection is made and coupled to each other.

In addition, each body (213,231,251,271,295) of the tab branching part 230, the tap coupling part 250, the leakage current diagnosis part 210, the insulation deterioration measuring part 270 and the protection part 290 is installed in the center, Between the conductor member 215,233,235,253,277,297 and the tab branching part 230, the tab coupling part 250, the leakage current diagnosis part 210, the insulation deterioration measuring part 270 and the body 213,231,251,271,295 of the protection part 290, in the drawing Although not shown, insulating members 217 and 255 for insulation are provided.

And the tab coupling part 250 is installed on the first body 231 of the tab branching part 230, and the leakage current diagnosis part 210 is installed on one side of the first body 231, and the tap coupling part is installed. It is installed in an 'L' shape together with the part 250 , and the insulation deterioration measuring part 270 and the protection part 290 are installed on the front part (or the back part) of the first body 231 .

That is, the tab branching part 230 includes a first body 231 , an upper tab 237 protruding above the first body 231 to be coupled to the tab coupling part 250 , and the first body 231 . A side tab 239 protruding from one side of the body 231 to be coupled to the leakage current diagnosis unit 210, and a tab installed in the center of the first body 231 and protruding outside the upper tab 237 The vertical conductor member 235 electrically coupled to the coupling part 250 and the side tab 239 installed in the inner center of the first body 231 are protruded to the outside and electrically coupled to the leakage current diagnosis part 210 It is configured to include a horizontal conductor member (233).

In addition, an insulating member (not shown) is provided inside the first body 231 , the upper tab 237 , and the side tab 239 to surround the vertical conductor member 235 and the horizontal conductor member 233 to form insulation. provided

In particular, since the tap coupling unit 250 and the leakage current diagnosis unit 210 are coupled to the tab branching unit 230 , the overall shape is 'L'.

As such, the adapter 200 is provided with the tab branch 230, so that the tab branch 230 has an 'L' shape horizontally and vertically, so that the overall length of the bushing adapter 200 applied to the present invention is reduced, and the overall structure becomes very simple.

In addition, spacers 209, 219, 257a, and 257b occupying a certain space are formed at the coupling portion where the tab coupling unit 250 and the leakage current diagnosis unit 210 are coupled.

The formation of the spacers 209, 219, 257a, and 257b makes it possible to properly couple and disassemble the internal conductor members 215 and 253 or the insulating members 217 and 255, and enable flexibility in operation.

In addition, at the coupling end at which the tab coupling part 250 and the conductor members 215 and 253 of the leakage current diagnosis part 210 are coupled to each other, an elastic part formed as an empty space inside and resiliently provided is formed, and the elastic part A conductor spring 220 is provided in the empty space inside.

More specifically, as shown in FIGS. 8 and 9 , the tab coupling part 250 includes a second body 251 and a second conductor member 253 installed at the center of the second body 251 . ) and a second insulating member 255 installed between the second conductor member 253 and the second body 251 to provide insulation.

In addition, spacers 257a and 257b are formed in upper and lower portions of the second conductor member 253 .

In addition, the second conductor member 253 and the vertical conductor member 235 are electrically coupled to both coupling ends of the second conductor member 253 and are connected to a terminal (not shown) of the bushing tab 1 . A first elastic part 253a is formed for this purpose, and a conductor spring 220 is provided in the empty space 253b inside the first elastic part 253a to connect the vertical conductor member 235 and the terminal and facilitate separation.

In addition, as shown in FIGS. 5, 7 and 10 , the insulation deterioration measuring unit 270 has one end installed on the front side of the inside 230a of the first body 231 of the tab branching part 230 . However, the third body 271 protruding from the front portion and the third body 271 protruding in parallel with the third body 271 inside in the longitudinal direction of the third body 271 to be connected to the insulation deterioration measuring device 40 It is configured to include the provided third conductor member 277 .

And the third conductor member 277 is electrically connected to the horizontal conductor member 233, and an insulating member (not shown) is installed between the third conductor member 277 and the third body 271 to insulate. let it go

Accordingly, the insulation degradation measuring unit 270 can also be electrically connected to the leakage current diagnosis unit 110 .

In addition, as shown in FIGS. 5, 8 and 11 , the leakage current diagnosis unit 210 includes a side tab 239 protruding from the first body 231 of the tab branching unit 230 and an electrical A connector ( 210a ) that is connected and connected to the connector ( 211) is configured to include a leakage current diagnosis member 210b.

In addition, the connecting member 210a has a fourth tab portion 213c having one end connected to the side tab 239 of the tab branching portion 230 and a flange portion having the other end coupled to the leakage current diagnosis member 210b. A fourth body 213 provided with 213a, a fourth conductor member 215 installed therein in the longitudinal direction of the fourth body 213, and an outer surface of the fourth conductor member 215 It is configured to include a fourth insulating member 217 installed between the fourth body 213 to insulate the fourth conductor member 215 .

And a second elastic part 215a is provided at the end of the fourth conductive member 215 to be electrically coupled to the horizontal conductive member 233, and an empty space inside the second elastic part 215 ( 215b) is provided with a conductor spring 220 to facilitate coupling and separation between the fourth conductor member 215 and the horizontal conductor member 233 .

In addition, the leakage current diagnosis member 210b includes a coupling body 201 having one end coupled to the connecting member 210a and the other end coupled to the connector 211, and the coupling body 201 inside. installed so that one end is electrically connected to the fourth conductor member 215 inside the connection member 210a, and the other end is filled with a protection circuit 205 connected to the connector 211 and the coupling body 201 inside. It is configured to include a filling insulating material 203 that surrounds and insulates the outside of the protection circuit 205 .

In addition, the connector 211 is an N-type connector applied and is connected to a coaxial cable (not shown) having a shielding function, and the coaxial cable is a lead wire connected to the rear end of the adapter 200, and the bushing (1) It is connected to the leakage current diagnosis device 20 (refer to FIG. 1).

In addition, the connector 211 is provided with a lead terminal 211a on the opposite side to which the coaxial cable is connected, and the lead terminal 211a is connected to the protection circuit 205 .

In addition, the protection circuit 205 is connected to the extension portion 215c of the fourth conductor member 215 of the connection member 210a.

The protection circuit 205 and the lead terminal 211a and the extension part 215c may be connected in the same way as soldering.

In addition, as shown in FIG. 11 , a spacer 219 is formed around the second elastic portion 215a of the fourth conductor member 215 to provide a fourth conductor member 215 and a fourth insulating member 217 . allows for proper bonding and disassembly, and flexibility of operation.

And the protection unit 290 is electrically coupled to the insulation degradation measuring unit 270 and is installed in a waterproof cap 291 in the form of a cap, and in the internal space 291a of the waterproof cap 291 . and a short cap 290a provided to be electrically connected to the third conductor member 277 .

In addition, the short cap 290a includes a case 293 provided to be coupled to the third body 271 , a fifth body 295 installed in the case 293 , and the fifth body 295 . It is configured to include a fifth conductor member 297 installed therein to be electrically connected to the third conductor member 277 .

And the waterproof cap 291 made of a hat shape is made of a metal material to prevent foreign substances (eg, rain) from penetrating into the short cap 290a (waterproof function), and the short cap 290a is removed from the outside. Protects against impact.

And, as shown in FIG. 4 , the leakage current diagnosis device 20 is connected to the connector 211 of the leakage current diagnosis unit 210 of the adapter 200 to diagnose the leakage current of the bushing 1 .

In addition, the insulation deterioration measuring device 40 is connected to the third conductor member 277 of the insulation deterioration measuring unit 270 of the adapter 200 and the connector 1b of the bushing connected to the transformer lead, respectively, and the bushing ( 1) Measure insulation degradation.

Meanwhile, reference numerals 233a and 235b not described in FIGS. 9 and 10 denote protrusions protruding from the ends of the horizontal conductor member 233 and the vertical conductor member 235, and the first elastic parts 253a and 2 It is a coupling portion coupled to the elastic portion (215a).

In addition, reference numeral 203, which is not described in FIGS. 5 to 9, denotes a nut member that is fastened to the tab portion of each member and connects the members.

In addition, reference number 207 shows a bolt or screw for fastening each member.

And reference numeral 209, which is not described in FIG. 11, denotes a spacer.

The operation of the device for both diagnosing leakage current and measuring insulation deterioration of a transformer bushing using a bushing adapter according to the present invention having the above configuration will be described as follows.

Prior to the explanation, the current domestic and overseas power facility preventive diagnosis market is growing rapidly, and in Korea, power facility failure prevention is prevented through real-time status diagnosis of power facilities. A diagnostic system is being applied to major substations, and there is a plan to expand to all substations.

In addition, the currently operated bushing insulation deterioration measurement should be checked once every three years, and the bushing leakage current online diagnosis system should be checked at least once a year, and all leakage current sensors are checked by injecting current. .

In addition, in order to calibrate the bushing insulation deterioration measurement and diagnosis system in the field environment where the power facility is installed, it is necessary to remove the adapter and reinstall it. has occurred, and there is always a possibility of increasing the failure of power facilities, so improvement measures are urgently needed.

That is, as shown in FIGS. 1 and 2 , in the case of the conventional adapters 10 and 10a, the bushing tab 1a of the bushing 1 is used to measure insulation deterioration of the bushing 1 and to calibrate the leakage current diagnosis device. ), there was a problem that the test could be performed only by removing the adapters 10 and 10a.

The present invention has solved all the problems as described above, so that it is possible to easily check the insulation deterioration measurement of the bushing 1 and the inspection during calibration of the leakage current diagnosis device in the field.

More specifically, the method for diagnosing leakage current and measuring insulation deterioration of a bushing to which the apparatus for measuring leakage current of a transformer bushing using a bushing adapter according to the present invention and measuring insulation deterioration is applied will be sequentially described as follows.

First, the waterproof cap 291 coupled to the first body 231 of the tab branch 230 of the adapter 200 is separated.

Next, the short cap 290a provided to be electrically connected to the third conductor member 277 of the insulation degradation measuring unit 270 is separated.

In addition, after the short cap 290a is separated, the insulation deterioration measuring device 40 is connected to be electrically connected to the third conductor member 277 to measure the insulation deterioration of the bushing 1 .

After the insulation degradation measurement is finished, the short cap 290a is connected again.

Next, the waterproof cap 291 is coupled to the short cap 290a.

As described above, the present invention can prevent accidents due to assembly defects occurring in the process of repeatedly assembling the adapters 10 and 10a and the coaxial cable as in the prior art.

In addition, as described above, if the device for both diagnosing leakage current and measuring insulation deterioration of a transformer bushing using a bushing adapter according to the present invention is applied, the insulation deterioration of the bushing in the field without removing the adapter 200 from the bushing 1 is applied. Measurement and leakage current diagnosis are possible.

And the adapter 200 of the device for both diagnosing leakage current of a transformer bushing and measuring insulation deterioration using the bushing adapter according to the present invention has a tap branch unit 230 having a simple configuration and structure, and an insulation deterioration measuring unit 270 here. was configured.

Accordingly, the problem of the existing adapters 10 and 10a protruding out of the bushing flange due to the increased length was solved.

And FIG. 12 shows a state in which a device for both diagnosing leakage current and measuring insulation deterioration of a transformer bushing using a bushing adapter according to the present invention in the field is installed on the bushing tap 1a of the bushing 1, which is improved unlike the existing one. The adapter 200 does not protrude out of the flange of the bushing 1 .

In addition, by providing the leakage current diagnosis unit 210 in the device for both diagnosing leakage current and measuring insulation deterioration of a transformer bushing using the bushing adapter according to the present invention, the protection unit 290 is normally provided to the insulation deterioration measuring unit 270 to allow leakage current to flow through the adapter 200 .

And when there is a need to open the leakage current circuit such as insulation degradation measurement, the third conductor member 277 and the exposed third conductor member 277 are tested by separating the protection part 290 from the first body 231 of the tab branching part 230 . terminals can be connected.

Therefore, when the device for both diagnosing leakage current and measuring insulation deterioration of a transformer bushing using the bushing adapter according to the present invention is applied, the adapter 200 is removed from the bushing 1 during insulation deterioration measurement and leakage current diagnosis of the bushing 1 as in the prior art. no need to separate

That is, in the prior art, by repeatedly separating and fastening the adapters 10 and 10a from the bushing 1 to the bushing 1 at the time of measuring insulation deterioration and diagnosing leakage current of the bushing 1, the adapter 10 due to poor assembly ,10a) or the screw thread of the bushing tap (1a) was defective, and the coaxial cable was not properly connected, so there were cases where it came loose.

By applying the device for both diagnosing leakage current of a transformer bushing and measuring insulation deterioration using a bushing adapter according to the present invention, the conventional problems can be solved.

As described above, the present invention has been described with reference to one embodiment shown in the drawings, but this is merely exemplary, and various modifications and equivalent embodiments are possible therefrom by those skilled in the art. will understand

Accordingly, the true protection scope of the present invention should be defined only by the appended claims.

1. Bushing
1a. bushing tap
20. Leakage Current Diagnosis Device
40. Insulation deterioration measuring equipment
200. adapter
210. Leakage current diagnosis unit
230. Tap branch
231. 1st body
250. Tap coupling part
270. Insulation deterioration measuring part
290. Department of Protection

Claims (10)

The tab branching part 230 having a first body 231 branched in three directions and having tab parts 237 and 239 formed at the branching ends, and protruding upward from the first body 231, the first body 231 A lower coupling tab 251b is formed at the lower end so as to be electrically coupled to the The coupling part 250 and the tap coupling part 250 are electrically coupled to the first body 231 and are coupled to form an 'L' shape so that the leakage current diagnosis is made. An adapter 200 including a 210 and an insulation deterioration measuring unit 270 provided to measure insulation deterioration by being electrically coupled to the first body 231 orthogonally to the leakage current diagnosis unit 210 . )Wow;
an insulation deterioration measuring device 40 connected to the insulation deterioration measuring unit 270 and a connector 211 of the bushing 1 connected to a transformer lead wire, respectively, for measuring insulation deterioration of the bushing 1;
a leakage current diagnosis device 20 connected to the leakage current diagnosis unit 210 to diagnose the leakage current of the bushing;
A protection unit 290 electrically coupled to the insulation deterioration measuring unit 270 and detachably coupled to protect the insulation deterioration measuring unit 270;
The tab branching part 230, the tab coupling part 250, the leakage current diagnosing part 210 and the insulation deterioration measuring part 270 are electrically connected to each other and have a conductor member ( 215,233,235,253,277,297) is provided,
The tab branch 230 is,
a first body 231;
an upper tab 237 protruding upward from the first body 231 to be coupled to the tab coupling part 250;
a side tab 239 protruding from one side of the first body 231 to be coupled to the leakage current diagnosis unit 210;
a vertical conductor member 235 installed in the inner center of the first body 231 and protruding to the outside of the upper tab 237 and electrically coupled to the tab coupling part 250;
and a horizontal conductor member 233 installed in the inner center of the first body 231 and protruding to the outside of the side tab 239 and electrically coupled to the leakage current diagnosis unit 210,
The protection unit 290,
a waterproof cap 291 electrically coupled to the insulation degradation measuring unit 270 and formed in a hat shape;
A short cap (290a) installed in the inner space of the waterproof cap (291) to be electrically connected to the insulation deterioration measuring unit (270);
The short cap 290a is,
a case 293 provided to be coupled to the third body 271;
a fifth body 295 installed in the case 293;
a fifth conductor member 297 installed inside the fifth body 295 and electrically connected to the third conductor member 277;
The leakage current diagnosis unit 210,
a connection member (210a) electrically connected to a side tab (239) protruding from the first body (231);
The leakage current diagnosis member 210b is electrically connected to the other end of the connection member 210a and provided with a connector 211 to be connected to the leakage current diagnosis device 20 so that the leakage current diagnosis is made at the other end thereof. ); including;
The insulation deterioration measuring unit 270,
a third body 271 having one end installed on the front portion of the interior of the first body 231 and protruding from the front portion;
A third conductor member 277 which protrudes in parallel with the third body 271 in the longitudinal direction of the third body 271 and is provided to be connected to the insulation deterioration measuring device 40; includes;
The third conductor member 277 is electrically connected to the horizontal conductor member 233, and an insulating member is installed between the third conductor member 277 and the third body 271 to provide insulation. A device for both diagnosing leakage current of transformer bushings and measuring insulation deterioration using bushing adapters. delete delete According to claim 1,
The tab coupling part 250 is installed on the upper part of the first body 231,
The leakage current diagnosis unit 210 is installed on one side of the first body 231,
The insulation deterioration measuring unit 270 and the protection unit 290 are installed on the front side of the first body (231). According to claim 1,
Spacers 209, 219, 257a, 257b occupying a certain space are formed at the coupling portion where the tap coupling unit 250 and the leakage current diagnosis unit 210 are coupled,
The tab coupling part 250 includes a second body 251 , a second conductor member 253 installed at the center of the second body 251 , the second conductor member 253 and the second body 251 . ) is installed between and configured to include a second insulating member 255 for insulation to be made,
Diagnosis and insulation of leakage current of a transformer bushing using a bushing adapter, characterized in that by forming the spacers (209, 219, 257a, 257b), the internal conductor members (215, 253) or the insulating members (217, 255) can be combined and disassembled A device for measuring deterioration. According to claim 1,
At the coupling end at which the tap coupling part 250 and the conductor members 215 and 253 of the leakage current diagnosis part 210 are coupled to each other, an elastic part is formed as an empty space therein and is provided elastically,
A device for diagnosing leakage current of a transformer bushing and measuring insulation deterioration using a bushing adapter, characterized in that a conductor spring 220 is provided in the empty space inside the elastic part. delete According to claim 1,
The connecting member (210a) is,
a fourth body 213 having a fourth tab portion 213c having one end connected to the side tab 239 and a flange portion 213a having the other end coupled to the leakage current diagnosis member 210b;
a fourth conductor member 215 installed therein in the longitudinal direction of the fourth body 213;
A bushing adapter comprising a; a fourth insulating member (217) installed between the fourth conductor member (215) and the fourth body (213) to insulate the fourth conductor member (215) A device for both diagnosing leakage current of transformer bushings and measuring insulation deterioration using According to claim 1,
The leakage current diagnosis member 210b,
a coupling body 201 having one end coupled to the connecting member 210a and the other end coupled to the connector 211;
a protection circuit 205 installed inside the coupling body 201, one end electrically connected to the fourth conductor member 215 inside the connecting member 210a, and the other end connected to the connector 211;
Diagnosis of leakage current and insulation deterioration of a transformer bushing using a bushing adapter, characterized in that it includes; Measuring device. delete

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