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KR100965818B1 - Clamp-type current sensor with a rogowski coil - Google Patents

Clamp-type current sensor with a rogowski coil Download PDF

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Publication number
KR100965818B1
KR100965818B1 KR1020080044003A KR20080044003A KR100965818B1 KR 100965818 B1 KR100965818 B1 KR 100965818B1 KR 1020080044003 A KR1020080044003 A KR 1020080044003A KR 20080044003 A KR20080044003 A KR 20080044003A KR 100965818 B1 KR100965818 B1 KR 100965818B1
Authority
KR
South Korea
Prior art keywords
coil
current sensor
core
logo
housing
Prior art date
Application number
KR1020080044003A
Other languages
Korean (ko)
Other versions
KR20090118298A (en
Inventor
조원장
Original Assignee
태화트랜스 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 태화트랜스 주식회사 filed Critical 태화트랜스 주식회사
Priority to KR1020080044003A priority Critical patent/KR100965818B1/en
Priority to PCT/KR2008/004294 priority patent/WO2009139521A1/en
Publication of KR20090118298A publication Critical patent/KR20090118298A/en
Application granted granted Critical
Publication of KR100965818B1 publication Critical patent/KR100965818B1/en

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    • 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
    • G01R15/186—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using current transformers with a core consisting of two or more parts, e.g. clamp-on type
    • 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
    • G01R15/181—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using coils without a magnetic core, e.g. Rogowski coils

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

The present invention can be easily installed and dismantled on the conductor through which the current to be measured flows, and the noise caused by the capacitance between the core core and the coil, the coil and the coil between the coil and the influence of the coil by the external magnetic field can be minimized. A split clamp current sensor having a Rogowski coil.

In the split clamp type current sensor having a logo ski coil according to the present invention, a logo ski coil formed by winding a coil around a flexible concentric core and one end of semi-circular first and second housing members are connected by a hinge part. And an opening and closing housing formed therein, wherein the logo ski coil is accommodated therein, and coupling portions for retaining a ring shape are formed at the other ends of the first and second housing members, respectively, and the first and second housing members. It comprises a shielding cover coupled to the open top of the. The Roskoski coil is preferably formed by winding the end of the coil through a flexible concentric core after winding of the coil to be parallel to the start of the coil and connecting to the neutral terminal and wrapping the outer circumferential surface of the coil with the shielding cable. Roskiski coil wrapped with cable is preferably inserted into the protective tube.

Split clamp current sensor, Logo ski coil, Retractable housing, Shield cover, Shield cable

Description

Split clamp type current sensor with Rogo ski coil {CLAMP-TYPE CURRENT SENSOR WITH A ROGOWSKI COIL}

The present invention relates to a current sensor having a Rogowski coil.

Conventionally, current transformers (CTs) using magnetic coils have been used as means for measuring load currents and fault currents in power devices such as switchboards and various high voltage switch gears. Recently, many current sensors using Rogowski coils have been used.

Rogowski coils are excited by using a plastic bobbin made of a special material that forms an air core instead of a magnetic core, unlike a general current converter. If it flows, a voltage proportional to the current of the conductor is induced in the coil wound around the core core by the current, and based on this, the current flows through the conductor.

Rogowski coil has the characteristics that there is no over-current damage due to iron core saturation, it is generally effectively applied to high-voltage current flowing devices such as air circuit breaker, gas insulated load switch.

1 is an exploded perspective view of a current sensor 100 having a logo ski coil according to the prior art.

As shown in FIG. 1, the current sensor 100 having a logo ski coil according to the related art has a coil 113 in a ring-shaped concentric core 111 through which a conductor (not shown) through which a current to be measured flows is passed. Rogoski coil (110), which is formed by winding) and a conductor (not shown) through which a current to be measured flows, is formed in a ring shape, and the Rogoski coil (except for the connecting end 113a of the coil 113) It comprises a housing 120 for receiving the 110, and the epoxy molding 130 for sealing the Rogo ski coil 110 accommodated in the housing 120.

However, in the case of the current sensor 100 having a Rogowski coil according to the prior art, there is a problem in that it is not easy to install or dismantle onto a conductor through which a current to be measured flows as it is formed as a ring shape that cannot be opened and closed as a whole.

In addition, since the logo ski coil 110 is formed in a form in which the coil 113 is wound around the core core 111, the noise or the coil 113 and the coil due to the capacitance between the core core 110 and the coil 111 are coiled. Noise is generated due to capacitance between the coil 113 is affected by the external magnetic field.

An object of the present invention is to provide a split clamp type current sensor having a logo ski coil which can be easily installed and easily dismantled on a conductor through which a current to be measured flows.

Another object of the present invention is to minimize the noise caused by the capacitance between the core core and the coil, the noise caused by the capacitance between the coil and the coil, and the effect of the coil by the external magnetic field, thereby enabling more precise current monitoring. It is to provide a split clamp type current sensor having a.

An object of the present invention described above is a Rogo-Ski formed by winding a coil around a flexible core core in a current sensor including a Rogo-Ski coil installed around a conductor through which a current to be measured flows and detecting a current flowing through the conductor. One end of the coil and the semicircular first and second housing members are connected to each other by a hinge portion to be opened and closed, and the Rogowski coil is accommodated therein, and the other end of the first and second housing members has a ring shape. This is achieved by providing a split-clamp type current sensor comprising an openable housing each having a coupling portion to be maintained, and a logo ski coil comprising a shielding cover coupled to an open upper end of the first and second housing members. .

According to a preferred feature of the present invention, the Rogosky coil is located after the coil is wound through the end of the coil through the co-core core side by side with the starting end of the coil connected to the neutral terminal and the outer peripheral surface of the shielded cable as Is formed.

According to a more preferred feature of the invention, the logo ski coil wrapped with the shielding cable is inserted into the protective tube.

According to a more preferable feature of the present invention, it further comprises a connector which is formed to protrude to one side of the first or second housing member and the coil end of the Rogowski coil.

According to an even more preferable feature of the present invention, it further comprises a cushion member coupled to the inner circumferential surface of the first and second housing member forming a ring by the coupling portion to be stably installed on the conductor.

According to the clamp-type current sensor provided with a logo ski coil according to the present invention, the flexible logo ski coil is embedded in a ring-shaped opening and closing housing can be easily installed onto a conductor through which the current under measurement flows and the current under measurement flows. There is an excellent effect that can be easily dismantled from the conductor.

In the manufacture of Rogowski coils, after winding of the coil, the end of the coil penetrates through the flexible core core and is positioned side by side with the beginning of the coil. Noise due to capacitance between coils, noise due to capacitance between coils and coils, and effects of coils due to external magnetic fields can be minimized to enable more accurate current monitoring.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, which are intended to describe in detail enough to be easily carried out by those skilled in the art to which the present invention pertains. This does not mean that the technical spirit and scope of the present invention is limited.

2 is a perspective view of a clamp type current sensor having a logo ski coil according to the present invention, Figure 3 is an exploded perspective view of a clamp type current sensor having a logo ski coil according to the present invention, Figure 4 In the clamp type current sensor having a logo skicoil according to the present invention, a cross-sectional structural view of the logo ski coil is shown, and FIGS. 5A to 5I show a manufacturing process of a clamp type current sensor having a logo ski coil according to the present invention. Is shown.

Clamp-type current sensor 1 having a Rogowski coil according to the present invention, can be easily installed and dismantled on the conductor (not shown) through which the current to be measured flows, the flexible core core 11 and To minimize the influence of noise due to capacitance between the coil 13, between the coil 13 and the coil 13 and the influence of the coil 13 by the external magnetic field to enable more accurate current monitoring, FIG. As shown in FIGS. 2 to 5I, the logo ski coil 10 formed by winding the coil 13 around the flexible concentric core 11 and the semi-circular first and second housing members 21 and 23 are formed. One end is connected by the hinge portion 25 is formed to be opened and closed, the logo ski coil 10 is accommodated therein, the other end of the first and second housing members (21, 23) the coupling to maintain the ring shape Opening and closing how each part 27 is formed It comprises a shielding cover 30 is coupled to the open upper end of 20 and the first and second housing members (21, 23).

Here, the Rogowski coil 10 measures the current flowing through the conductor by using an induced voltage induced in the coil 13 by the measured current when the current under flow flows through the conductor (not shown). The coil 13 is wound around the flexible core core 11 having a predetermined length.

The core applied to the Rogowski coil 10 is preferably a flexible core core 11, which is preferably formed of a flexible material so that it can be flowed in accordance with the opening and closing of the openable housing 20, which will be described later. Since the core core 11 is formed of a tube shape made of synthetic resin or rubber instead of a metal material, it is preferable that there is no iron core saturation as in the iron core core, so that high current measurement is possible.

In addition, the Rogo ski coil 10 is passed through the end of the coil 13 through the flexible concentric core 11 after the winding of the coil 13 at the time of the neutral terminal (not shown) placed side by side with the start end of the coil And the outer circumferential surface is wrapped with a shielding cable 15 to remove the influence of the external magnetic field, between the flexible core core 11 and the coil 13, between the coil 13 and the coil 13 The noise due to the capacitance is removed, and at the same time, it is formed in a structure that minimizes the influence of the external magnetic field on the coil 13.

In addition, it is preferable that the logo ski coil 10 wrapped with the shielding cable 15 is inserted into the protection tube 17. The protection tube 17 is kept logo wrapped with the shield cable 15 and at the same time. It serves to prevent damage to the coil 10, in particular damage to the shielded cable (15).

The above-mentioned logo ski coil 10 is accommodated in the retractable housing 20 and installed around the conductor through which the current to be measured flows. The retractable housing 20 forms a protective case in which the logo ski coil 10 is embedded. At the same time, to facilitate the installation and disassembly of the clamp-type current sensor 1 having the Rogowski coil according to the present invention with respect to the conductor, one end and the semicircle of the semi-circular first housing members 21 are opposed to each other. One end of the second housing member 23 of the shape is connected by the hinge portion 25 is formed in a structure that can be opened and closed during installation and dismantling.

The openable housing 20 has one end of the first housing member 21 and the second housing member 23 connected by the hinge portion 25 so that the logo ski coil 10 may be embedded therein. The other ends of the two ends of the logo ski coil 10 are formed in a closed shape. The openable housing 20 is preferably injection molded with a synthetic resin such as epoxy resin.

In addition, the other end of the first housing member 21 and the second housing member 23 is formed with a coupling portion 27 to maintain the ring shape of the open and close housing 20 when installed on the conductor, this coupling portion ( 27, the first and second threaded holes 27a, 27b formed at the other ends of the first housing member 21 and the second housing member 23 and communicating with each other, and the screw holes ( 27a, 27b) may be formed as a fastening screw, and according to the exemplary embodiment, respectively, formed at the other ends of the first housing member 21 and the second housing member 23 and detachable from each other with a snap coupler or press-fit coupler. Can also be formed.

The shielding cover 30 is coupled to an open upper end of the first housing member 21 and the second housing member 23 described above, and the shielding cover 30 is an open / closed housing 20 having a logo ski coil 10 therein. ) To close the logo ski coil 10 from the external magnetic field by closing the open top of the), injection molded into a synthetic resin such as epoxy resin to open the first housing member 21 and the second housing member 23 It is preferable to be integrally coupled to the top.

In addition, the connector 40 is formed on one side of one of the first housing member 21 and the second housing member 23 to protrude to one side, the connector 40 is the current measured by the Rogowski coil (10) In order to transmit a signal, both ends of the coil 13 wound around the flexible core core 11 are coupled to the connector 40. The connector 40 is preferably formed of an N-shaped coaxial cable connector.

The split clamp type current sensor 1 having a logo ski coil according to the present invention has a first housing member 21 and a second housing member 23 that form a ring by a coupling part 27 when installed onto a conductor. It is preferable that the cushion members 50 are respectively coupled to the inner circumferential surface of the).

The cushion member 50 has its inner circumferential surface in contact with the conductor through which the current to be measured flows, so that the split clamp type current sensor 1 having the logo ski coil according to the present invention can be stably installed around the conductor and by external force. It serves to mitigate the shock that can be transmitted between the split clamp type current sensor 1 and the conductor having a logo ski coil according to the present invention, it is preferably formed of a semi-circular rubber, silicone, urethane material The inner peripheral surfaces of the first housing member 21 and the second housing member 23 are adhered or fused.

Hereinafter, referring to Figures 5a to 5i, the manufacturing process of the split clamp current sensor 1 having a logo ski coil according to the present invention will be described as follows:

First, as shown in FIG. 5A, the coil 13 is wound around the flexible core core 11 having a predetermined length, and the end portion thereof is passed through the flexible core core 11 to be positioned side by side with the starting end.

Next, as shown in FIG. 5B, the outer surface of the coil 13 is wrapped with the shielding cable 15, and then as shown in FIG. 5C, the logo ski coil 10 is inserted into the protective tube 17. Complete the manufacture of

Next, as shown in FIG. 5D, the Rosko ski coil 10 manufactured as described above is embedded in the open / closed housing 20 having one side open, and as shown in FIG. 5E, the connector ( 40), the shield cover 30 is integrally coupled to the open top of the first housing member 21 and the second housing member 23, as shown in FIGS. 5F and 5G.

Next, insert an open and closed housing 20 in which one side of a conductor (not shown) through which a current to be measured flows is opened, and as shown in FIG. 5H, by fastening and coupling the coupling part 17 to the open and closed housing 20. In this case, as shown in FIG. 5I, the cushion member 50 is coupled to the inner circumferential surfaces of the first housing member 21 and the second housing member 23 so that the logo according to the present invention can be obtained. It is preferable that the clamp type current sensor 1 having a ski coil can be stably installed around the conductor.

In the case of using the clamp type current sensor 1 having the Rogowski coil according to the present invention manufactured by the above-described process, the flexible Rogowski coil 10 is built into the ring-shaped open / closed housing 20. It can be easily installed on the conductor through which the measurement current flows and can be easily dismantled from the conductor through which the current to be measured flows, and the end of the coil 13 after the winding of the coil 13 in its manufacture of Rogowski coil 10 The part is passed through the flexible concentric core 11 to be positioned side by side with the start end of the coil 13, and then connected to the neutral terminal, and the outer circumferential surface thereof is wrapped with the shielding cable 17, so that the flexible concentric core 11 and the coil 13 are disposed. By minimizing the noise due to the capacitance between the), the noise due to the capacitance between the coil 13 and the coil 13 and the influence of the coil 13 by the external magnetic field, more accurate current monitoring is possible.

1 is an exploded perspective view of a current sensor having a Rogowski coil according to the prior art;

Figure 2 is a perspective view of a clamp type current sensor having a Rogowski coil in accordance with the present invention.

Figure 3 is an exploded perspective view of a clamp type current sensor having a Rogowski coil in accordance with the present invention.

Figure 4 is a clamp type current sensor having a logo skim coil according to the present invention, the cross-sectional structure of the logo skim coil.

Figures 5a to 5i is a manufacturing process diagram of a clamp type current sensor having a Rogowski coil in accordance with the present invention.

Explanation of symbols on the main parts of the drawings

1: clamp-type current sensor having a Rogowski coil according to the present invention

10: Rogo Ski Coil

11: flexible core core

13: coil

15: shielded cable

17: protective tube

20: retractable housing

21: first housing member

23: second housing member

25: hinge part

27: coupling part

30: shielding cover

40: connector

50: cushion member

100: current sensor having a Rogo ski coil according to the prior art

Claims (5)

A current sensor comprising a Rogowski coil installed around a conductor through which a current to be measured flows and detecting a current flowing through the conductor, Rogoski coil formed by winding a coil on the flexible core core; One end of the semi-circular first and second housing members are connected to each other by a hinge to be opened and closed, the logo ski coil is accommodated therein, and the other end of the first and second housing members maintains a ring shape. Opening and closing housings each of which is formed; And And a shielding cover coupled to an open upper end of the first and second housing members. The Rogo ski coil is formed by winding the coil through the end of the coil through a flexible concentric core and placed side by side with the start end, connected to the neutral terminal and wrapped around the outer peripheral surface with a shielding cable. Split clamp type current sensor that includes. Logo clamped coil wrapped with the shielded cable is a split clamp type current sensor comprising a logo ski coil, characterized in that inserted into the protective tube. The method according to claim 1 or 2, Split clamp type current sensor comprising a logo ski coil formed to protrude to one side of the first or second housing member and further comprises a connector coupled to the coil end of the logo ski coil. The method according to claim 3, Split clamps comprising a logo ski coil further comprises a cushion member coupled to the inner circumferential surfaces of the first and second housing members forming a ring by the coupling portion to be stably installed on the conductor. Type current sensor. delete
KR1020080044003A 2008-05-13 2008-05-13 Clamp-type current sensor with a rogowski coil KR100965818B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020080044003A KR100965818B1 (en) 2008-05-13 2008-05-13 Clamp-type current sensor with a rogowski coil
PCT/KR2008/004294 WO2009139521A1 (en) 2008-05-13 2008-07-23 Clamp type current sensor with rogowski coil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020080044003A KR100965818B1 (en) 2008-05-13 2008-05-13 Clamp-type current sensor with a rogowski coil

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KR20090118298A KR20090118298A (en) 2009-11-18
KR100965818B1 true KR100965818B1 (en) 2010-06-24

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Cited By (9)

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Publication number Priority date Publication date Assignee Title
KR101183625B1 (en) 2011-03-30 2012-09-18 제이앤디전자(주) Clamp-on flexible rogowski coil current transformer
CN105301331A (en) * 2015-11-24 2016-02-03 山东航天电子技术研究所 Novel Hall sensor skeleton
KR101696578B1 (en) * 2016-06-28 2017-01-13 송홍준 Illuminate device for electric cable manhole cover
KR101788472B1 (en) 2016-10-13 2017-10-19 송홍준 Image display device for Electric cable manhole cover
KR20180043709A (en) * 2016-10-20 2018-04-30 송홍준 Earthquake sensing device utilizing an electric cable leakage current
KR20180043710A (en) * 2016-10-20 2018-04-30 송홍준 Sinkhole sensing device utilizing an electric cable leakage current
KR101885433B1 (en) 2016-10-20 2018-08-03 송홍준 Sinkhole sensing device utilizing an electric cable leakage current
KR101889611B1 (en) 2016-10-20 2018-09-20 송홍준 Earthquake sensing device utilizing an electric cable leakage current
KR102121046B1 (en) * 2020-02-26 2020-06-17 주식회사 프로텍타코리아 Fault detector for composite transmission line

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