KR101778154B1 - Transducer of current transfermer protection - Google Patents

Transducer of current transfermer protection Download PDF

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Publication number
KR101778154B1
KR101778154B1 KR1020150186376A KR20150186376A KR101778154B1 KR 101778154 B1 KR101778154 B1 KR 101778154B1 KR 1020150186376 A KR1020150186376 A KR 1020150186376A KR 20150186376 A KR20150186376 A KR 20150186376A KR 101778154 B1 KR101778154 B1 KR 101778154B1
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KR
South Korea
Prior art keywords
terminal
housing
socket device
transducer
fixing screw
Prior art date
Application number
KR1020150186376A
Other languages
Korean (ko)
Other versions
KR20170076290A (en
Inventor
서봉원
Original Assignee
한전케이피에스 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 한전케이피에스 주식회사 filed Critical 한전케이피에스 주식회사
Priority to KR1020150186376A priority Critical patent/KR101778154B1/en
Publication of KR20170076290A publication Critical patent/KR20170076290A/en
Application granted granted Critical
Publication of KR101778154B1 publication Critical patent/KR101778154B1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/20—Modifications of basic electric elements for use in electric measuring instruments; Structural combinations of such elements with such instruments
    • G01R1/22—Tong testers acting as secondary windings of current transformers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/22—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-emitting devices, e.g. LED, optocouplers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/24—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices
    • G01R15/248—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices using a constant light source and electro-mechanically driven deflectors

Abstract

This technique discloses a transducer of a current transformer. According to the concrete example of the present invention, since the socket device and the socket device are separated or combined in a plug-in manner, the process due to the short circuit of the current transformer and the power supply is removed during the separation work for calibration or replacement of the transducer, It is easy to perform the calibration and replacement process of the transducer by the operation of releasing the opening portion and the shorting switch and the reliability of the instrument is improved because the prevention of the disturbance of the instrument due to the calibration change during normal operation and the elimination of the feeding are improved, The terminal is automatically disengaged from the inside, so that it is possible to remove the trip of the unit due to the ground fault or opening when the conventional cable is disconnected.

Description

TRANSDUCER OF CURRENT TRANSFERMER PROTECTION < RTI ID = 0.0 >

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transducer of a current transformer, and more particularly, to a technique for facilitating calibration or replacement of a transducer during normal operation as a transducer of a current transformer is separated or combined.

In general, a current transformer (CT) is a device used to convert a high current (30 A to 100,000 A) of an electric wire to a current of about 5 A or about 1A by reducing a current to operate an instrument, a relay and the like. Therefore, the current transformer is divided into two types of current transformers according to the purpose of use. The first one is a current transformer for measuring the amount of power of ammeter and meter, the second is a current transformer for ground relay, It is used to protect line, breaker, transformer and so on.

This transformer is made by winding a primary winding (primary side) with a small number of windings and a secondary winding (secondary side) with a large number of windings in a stratified iron core such as a transformer. The primary circuit to be measured is connected to the primary side, , A power meter, and a relay.

Since the high voltage and high current flows in the primary side of the current transformer like this, when the secondary side is opened while the primary side current is flowing, the line current (primary side current) becomes all the exciting current and the iron core is saturated and the heat is generated. There is a risk of being damaged or the transformer burning or exploding.

Therefore, if a fault occurs in the current transformer, the shorting jumper cable should be installed by loosening the terminal fixing bolt of the current transformer. However, unit trip can be continued in the process of wiring, and even if the short circuit operation is completed, A unit trip can be continued due to a ground or an open when disconnecting the cable of the terminal to which the power cable and the two strands are connected.

Accordingly, the present invention provides a structure in which the transducer and the terminal block are coupled to each other by a plug-in socket type, so that when the transducer is detached from the terminal block, the terminal is automatically detached from the terminal block, We propose a way to remove the unit trip.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a transducer and a terminal block in a plug- The present invention is intended to provide a transducer of a current transformer capable of eliminating a trip of a unit due to a ground fault or opening when an existing cable is disconnected as the terminal is automatically disconnected.

According to an aspect of the present invention, there is provided a transducer of a current transformer,

A male socket device integrally provided with the transducer and having a terminal projected to the outside; And

And a female socket device for inserting the terminal therein to connect the contacts,

And the terminal of the male socket device and the female socket device are coupled or separated by a plug-in method.

Preferably, the socket-

A housing having an outer circumferential surface formed of an insulator; A fixing screw fixed to an inner wall surface of the housing; A shorting portion fixed to the groove between the header and the shaft of the fixing screw and having a ring shape provided on the wall surface of the housing and a protruding terminal protruding integrally with the ring;

A housing having an outer circumferential surface formed of an insulator; A fixing screw fixed to an inner wall surface of the housing; An opening portion fixed to the groove between the header and the shaft of the fixing screw and having a ring shape provided on the wall surface of the housing and a protruding terminal protruding integrally with the ring,

And an insertion groove into which the short-circuit portion and the open-circuit terminal are housed and into which the female socket-type terminal block is inserted when the fastening screw of the short-circuit portion and the open portion is tightened.

Preferably, the socket-

And a protrusion provided at a central portion of the insertion groove to maintain a connection between the terminal of each of the shorting portion and the opening portion and the female socket device.

Preferably, the female socket device comprises:

A housing provided on the outer circumferential surface thereof as an insulator, for receiving a terminal of a short-circuit portion of the socket device and receiving the same; A terminal block which is provided in an opposing housing of the terminal of the shorting portion and inserts and fixes the terminal of the shorting portion by a force applied by tightening the fixing screw of the shorting portion; And a fixing screw provided at a lower portion of the terminal block to fix the terminal block,

A housing provided on the outer circumferential surface thereof as an insulator, for receiving a terminal of an opening portion of the socket device and receiving the terminal; A terminal block which is provided inside the housing facing the terminal and inserts and fixes the terminal by a force applied by tightening a fixing screw; And a fixing screw provided at a lower portion of the terminal block to fix the terminal block,

And a contact switch which is provided at a position opposite to the protrusion of the socket and is provided inside the housing for retracting the protrusion to receive the protrusion and deliver the short circuit current to the opening when the protrusion is retracted have.

Preferably, the contact switch includes:

A tear-shaped bobbin connected to a terminal provided on a bottom surface of the housing by pressing operation of the protrusion; A winding member wound on an outer peripheral surface of the bobbin to energize when the bobbin is pressed; And one end is fixedly coupled between the head and the shaft of the fixing screw of the shorting portion and the opening portion of the female socket device and the other end is extended between the one inner side wall face of the housing of the shorting portion and the opening portion of the female socket device and the one outer wall face of the housing And a fixing member having a separation prevention protrusion on the upper surface of the header of the bobbin in order to prevent the bobbin from being released to the outside of the housing when each terminal of the shorting portion and the opening portion of the socket device is detached from the terminal at the end thereof .

Preferably, the contact switch further includes a display member which is provided at the header of the bobbin and is turned on when the winding member is energized.

As described above, according to the present invention, since the male socket device and the female socket device are separated or combined by the plug-in method, the process due to the short circuit of the current transformer and the power supply pressure is removed during the separation work for calibration or replacement of the transducer The short-circuit part and the open-part contact, and the short-circuiting switch operation are easy to perform, and the reliability of the instrument is improved because the prevention of disturbance of the instrument due to the calibration change during normal operation and elimination of the power supply .

In addition, when the transducer is calibrated or replaced, the terminal is automatically disengaged from the inside, so that the tripping of the unit due to the grounding or opening of the existing cable can be eliminated.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description of the invention given below, serve to further understand the technical idea of the invention. And should not be construed as limiting.
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a front and rear view of a socket device of a transducer of a current transformer according to an embodiment of the present invention; FIG.
2 is a front and rear view of a female socket device of a transducer of a current transformer according to an embodiment of the present invention.
3 is a view showing a combined state of the male and female socket devices of the transducer of the current transformer according to the embodiment of the present invention.
4 is a view showing a detailed configuration of a socket receptacle of a transducer of a current transformer according to an embodiment of the present invention.
FIG. 5 is a view showing a detailed configuration of a female socket device of a transducer of a current transformer according to an embodiment of the present invention.
FIG. 6 is a view showing a current flow of a transducer of a current transformer according to an embodiment of the present invention before coupling between a socket device and a socket device. FIG.
7 is a view showing a current flow during coupling between a male and female socket devices of a transducer of a current transformer according to an embodiment of the present invention.
8 is a view showing a current flow after coupling the male and female socket devices of the transducer of the current transformer according to the embodiment of the present invention.

In order to fully understand the present invention and operational advantages of the present invention and the objects attained by the practice of the present invention, reference should be made to the accompanying drawings and the accompanying drawings which illustrate preferred embodiments of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the preferred embodiments of the present invention with reference to the accompanying drawings. Like reference symbols in the drawings denote like elements.

1 and 2 are views illustrating a detailed configuration of a transducer 100 and a terminal block 300 of a current transformer according to an embodiment of the present invention. FIG. 5 is a view showing a state in which the transducer 100 and the terminal block 300 are coupled. 1 to 3, a current transformer according to an embodiment of the present invention is provided with a socket socket device and a socket socket device in a plug-in type structure, and the transducer of the current transformer includes a terminal A transducer (100) comprising: And an arm socket type terminal block 300 in which terminals are detached or detached.

In the present invention, the transducer including the receptacle device 100 and the female socket device 300 is provided with an analog type secondary side signal of high voltage and current in order to display state information of the power system and the electric system on the central monitoring panel For example, when the operation connected to the current transducer (CT) is carried out, the current transformer (CT) 2 of the current transducer (CT) The car side must be short-circuited. That is, when the secondary side is opened, vaporization is carried into the terminal, and a high pressure is induced in the secondary side winding, and when the high pressure is generated, the insulation is broken and the unit is tripped.

Accordingly, since the transducers 100 and 300 must be short-circuited to the terminals during the calibration or replacement work, the conventional serial-type transducer is connected to the receptacle device 100 shown in FIG. And is configured to couple the illustrated female socket device 300 in a plug-in manner, as shown in FIG.

That is, referring to FIG. 3, the transducer includes a female socket device 300 shown in FIG. 2 disposed on the upper side of the male socket device 100 shown in FIG. 1, When the breakwater socket device 100 is detached from the female socket device 300, the terminal of the male socket device 100 is separated from the female socket device 300 so that the break contact is automatically separated.

The short circuit portion and the open portion of the socket device 100 in which the terminals of the male socket device 100 are separated from the female socket device 300 and the shorting contacts are opened and the details of the shorting portion and the open portion of the female socket device 300 The configuration is as shown in Figs. 4 and 5.

Fig. 4 is a detailed view showing the detailed construction of the contacts of the short-circuit portion and the open portion of the socket device 100 shown in Fig. 1, Fig. 5 is a cross-sectional view of the short-circuit portion and the open portion of the female socket device 300 shown in Fig. FIG.

4, the socket device 100 includes a housing 111 having an outer circumferential surface formed of an insulator, a fixing screw 131 fixed to an inner wall surface of the housing 111, And a terminal 151 integrally projected from an annular terminal provided on a wall surface of the housing 111 and fixed to the groove.

The socket 100 includes a housing 112 having an outer circumferential surface formed of an insulator, a fixing screw 132 fixed to an inner wall surface of the housing 112, And an opening 152 which is coupled and integrally protruding from an annular terminal provided on a wall surface of the housing 112. [

The male threaded socket device 100 further includes an insertion slot 170 into which the terminals 151 and 152 are received and into which the female socket type terminal block 300 is inserted when the set screws 131 and 132 are fastened, And a protrusion 190 provided at a central portion of the groove 170 to maintain the engagement between the terminals 151 and 152 and the female socket device 300.

On the other hand, the female socket device 300 includes a housing 311 provided on the outer circumferential surface thereof as an insulator to receive and store the terminal 151 therein, and a fixing screw (not shown) provided inside the housing 311 opposed to the terminal 151 A terminal block 321 for inserting and fixing the terminal 151 by a force applied by tightening the terminal block 321 and a shorting portion including a fixing screw 331 provided at the lower portion of the terminal block 321 for fixing the terminal block 321 do.

The female socket device 300 further includes a housing 313 which is provided as an insulator on the outer circumferential surface and accommodates the terminal 152 and accommodates the terminal 152 therein and a fixing screw 132 provided inside the housing 313 facing the terminal 152, A terminal block 322 for inserting and fixing the terminal 152 by a force applied by tightening the terminal block 322 and an opening portion including a fixing screw 332 provided under the terminal block 322 to fix the terminal block 322.

In addition, the female socket device 300 is provided inside the housing 312, which is provided at the opposite position of the protrusion 190 and accommodates the protrusion 190 for receiving the protrusion 190 therein, and is energized when the protrusion 190 is inserted And a contact switch 340.

The contact switch 340 is housed in a housing 312 provided at a position where the protrusion 190 is opposed to the contact switch 340 so that the contact switch 340 is pressed by the protrusion 190 when the protrusion 190 is inserted, A winding member 343 which is wound on the outer circumferential surface of the bobbin 342 so as to energize the bobbin 351 when the bobbin 351 is pressed and a winding member 343 having one end fixed to the fixing screws 331 and 332 And the other end extends between the one inner side wall surface of the housing 311 and the outer one side wall surface of the housing 312 and the bobbin 342 And a securing member 345 having an escape prevention protrusion 344 on the upper surface of the header of the bobbin 342 to prevent the protrusion 342 from being detached to the outside of the housing 312.

The contact switch 340 may further include a display member 346 which is provided at the header of the bobbin 342 and is turned on when the winding member 343 is energized.

According to this configuration, the terminals 151 and 152 are fastened to the terminal block 321 of the female socket device 300 by the fastening operation of the fastening screws 131 and 132 of the short- (Not shown). Whereby the contacts of the shorting portion and the opening portion are short-circuited.

The protrusion 190 of the male socket device 100 pushes the bobbin 342 of the contact switch 340 and the contact switch 340 is coupled as the terminal of the bobbin 342 is connected to the terminal 341 .

When the short circuit portion and the open portion of the male socket transducer 100 are connected to the contact portion of the short circuit portion and the open portion of the female socket device 300 and when the short circuit portion 341 of the contact switch 340 is connected, Is as follows.

6 to 8 are views showing a contact process of the socket device 100 and the socket device 300 shown in FIGS. 4 and 5. FIG. 6 is a view showing a socket device 100 and a socket device The current of the current transformer passes through the fastening screw 331 of the short circuit portion of the female socket device 300 and the terminal block 321 and the bobbin 342 to be opened And flows to the terminal block 322 and the fixing screw 332.

7, on the road where the male socket device 100 and the female socket device 300 are contact-coupled and the current flows in a state in which the terminal 341 of the contact switch 340 is not connected, The current of the current transformer flows through the fastening screw 331 of the short circuit portion of the female socket device 300, the terminal block 321 and the bobbin 342 and flows in the order of the terminal block 322 of the opening portion and the fixing screw 332.

The current that has passed through the fixing screw 331 and the terminal block 321 of the shorting part is electrically connected to the terminal 151 of the short circuit part of the socket device 100, the fixing screw 131, the central monitoring part XDCR, (132) and the terminal (152).

8 is a view showing a current flow in a state in which the socket device 100 and the socket device 300 are contact-coupled and the terminal 341 of the contact switch 340 is connected, The current passed through the fixing screw 331 and the terminal block 321 of the shorting portion is transmitted to the terminal 151 of the socket unit 100 by the shorting portion, the fixing screw 131, the central monitoring portion XDCR, (132) and the terminal (152).

At this time, the display member 346 of the header of the bobbin 342 is turned on, so that the connection of the contact switch 340 can be intuitively confirmed.

According to the embodiment of the present invention, since the socket device and the socket device are separated or combined by the plug-in method, the process of shorting the current transformer and the power supply is removed during the separation work for calibration or replacement of the transducer, It is easy to calibrate and replace the transducer by the operation of releasing the contact portion and the shorting switch, and preventing the disturbance of the instrument due to the calibration change during the normal operation and eliminating the power supply, thereby improving the reliability of the instrument.

Also, when the transducer is detached from the terminal block, the terminal is automatically detached from the inside of the terminal block, so that it is possible to remove a trip of the unit due to a ground fault or opening when the conventional cable is disconnected.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Since the male and female socket devices are separated or combined in a plug-in manner, the process due to the short circuit of the current transformer and the power supply pressure is removed during the separation operation for calibration or replacement of the transducer, and the short- Since the deviation operation makes it easy to calibrate and replace the transducer and prevents the disturbance of the instrument due to the calibration change during normal operation and eliminates the power supply, reliability of the instrument is improved, and when the transducer is detached from the terminal, Will automatically make a great progress in terms of operational accuracy and reliability for transducers of a system current transformer that can eliminate the tripping of the unit due to ground or opening in case of detaching the existing cable, In addition to being able to market or operate a current transformer, This is an invention that is industrially applicable because it can be practically done.

Claims (6)

delete A male socket device integrally provided with the transducer and having a terminal projected to the outside; And
And a female socket device for inserting the terminal therein to connect the contacts,
A male socket device for connecting or disconnecting a terminal of the male socket device and a female socket device by plug-
The socket-
A housing having an outer circumferential surface formed of an insulator; A fixing screw fixed to an inner wall surface of the housing; A shorting portion fixed to the groove between the header and the shaft of the fixing screw and having a ring shape provided on the wall surface of the housing and a protruding terminal protruding integrally with the ring;
A housing having an outer circumferential surface formed of an insulator; A fixing screw fixed to an inner wall surface of the housing; An opening portion fixed to the groove between the header and the shaft of the fixing screw and having a ring shape provided on the wall surface of the housing and a protruding terminal protruding integrally with the ring,
And an insertion groove into which the short-circuit portion and the open-circuit terminal are housed and into which the socket-like terminal block is inserted when the fastening screw of the short-circuit portion and the open portion is tightened.
The water socket apparatus according to claim 2,
And a protrusion provided at a central portion of the insertion groove to maintain a connection between the terminal of each of the shorting portion and the opening portion and the female socket device.
4. The socket apparatus according to claim 3,
A housing provided on the outer circumferential surface thereof as an insulator, for receiving a terminal of a short-circuit portion of the socket device and receiving the same; A terminal block which is provided in an opposing housing of the terminal of the shorting portion and inserts and fixes the terminal of the shorting portion by a force applied by tightening the fixing screw of the shorting portion; And a fixing screw provided at a lower portion of the terminal block to fix the terminal block,
A housing provided on the outer circumferential surface thereof as an insulator, for receiving a terminal of an opening portion of the socket device and receiving the terminal; A terminal block provided inside the housing facing the terminal of the opening portion and for inserting and fixing the terminal of the opening portion by a force applied by tightening the fixing screw; And a fixing screw provided at a lower portion of the terminal block to fix the terminal block,
And a contact switch provided at a position opposite to the projection of the socket device and provided inside the housing for retracting the protrusion into the interior of the housing and transmitting a current of the short circuit to the opening when the protrusion is retracted A transducer of a galvanic current transformer featuring.
5. The apparatus according to claim 4,
A tear-shaped bobbin connected to a terminal provided on a bottom surface of the housing by pressing operation of the protrusion;
A winding member wound on an outer peripheral surface of the bobbin to energize when the bobbin is pressed; And
One end is fixedly connected between the head and the shaft of the fixing screw of the shorting portion and the opening portion of the female socket device and the other end is extended between the one inner wall face of the housing of the shorting portion and the opening portion of the female socket device and the one outer wall face of the housing And a fixing member having a separation prevention protrusion on an upper surface of the header of the bobbin to prevent the bobbin from being detached to the outside of the housing when the terminal of each of the shorting portion and the opening portion of the socket device is detached at the terminal end. A transducer of a galvanic current transformer.
6. The apparatus according to claim 5,
And a display member which is provided at a header of the bobbin and lights up when the winding member is energized.
KR1020150186376A 2015-12-24 2015-12-24 Transducer of current transfermer protection KR101778154B1 (en)

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Application Number Priority Date Filing Date Title
KR1020150186376A KR101778154B1 (en) 2015-12-24 2015-12-24 Transducer of current transfermer protection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150186376A KR101778154B1 (en) 2015-12-24 2015-12-24 Transducer of current transfermer protection

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Publication Number Publication Date
KR20170076290A KR20170076290A (en) 2017-07-04
KR101778154B1 true KR101778154B1 (en) 2017-09-13

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3284854B2 (en) * 1995-10-25 2002-05-20 日新電機株式会社 Protective relay
KR100874194B1 (en) 2007-02-13 2008-12-15 이원재 Test terminal

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3284854B2 (en) * 1995-10-25 2002-05-20 日新電機株式会社 Protective relay
KR100874194B1 (en) 2007-02-13 2008-12-15 이원재 Test terminal

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