KR100580594B1 - The current transformer with capacitive voltage detector - Google Patents

The current transformer with capacitive voltage detector

Info

Publication number
KR100580594B1
KR100580594B1 KR1020040078802A KR20040078802A KR100580594B1 KR 100580594 B1 KR100580594 B1 KR 100580594B1 KR 1020040078802 A KR1020040078802 A KR 1020040078802A KR 20040078802 A KR20040078802 A KR 20040078802A KR 100580594 B1 KR100580594 B1 KR 100580594B1
Authority
KR
South Korea
Prior art keywords
current transformer
voltage
voltage detecting
voltage detection
primary winding
Prior art date
Application number
KR1020040078802A
Other languages
Korean (ko)
Other versions
KR20060029934A (en
Inventor
김연수
Original Assignee
동우전기공업(주)
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 동우전기공업(주) filed Critical 동우전기공업(주)
Priority to KR1020040078802A priority Critical patent/KR100580594B1/en
Publication of KR20060029934A publication Critical patent/KR20060029934A/en
Application granted granted Critical
Publication of KR100580594B1 publication Critical patent/KR100580594B1/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/20—Instruments transformers
    • H01F38/22—Instruments transformers for single phase ac
    • H01F38/28—Current transformers
    • H01F38/30—Constructions
    • 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
    • G01R15/04—Voltage dividers
    • G01R15/06—Voltage dividers having reactive components, e.g. capacitive transformer
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • H01F27/402—Association of measuring or protective means

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transformers For Measuring Instruments (AREA)
  • Gas-Insulated Switchgears (AREA)

Abstract

본 발명은 전압검출형 변류기에 관한 것으로, 보다 상세하게는 고전압 수배전반내에 설치되는 변류기의 내부에 전압검출용소자(Capacitive voltage detector)를 내장시켜 고압충전부와 소자사이의 정전용량(Capacitance)에 의해 전압을 검출해서 선로의 활선 여부와 결상등, 선로의 상태를 파악하여 전력의 원활한 수급과 보수 및 점검시 안전관리에 중요한 역할을 하는 전압검출용 변류기에 관한 것이다. The present invention relates to a voltage detection type current transformer, and more particularly, a voltage detection element (capacitive voltage detector) is built into the current transformer installed in the high-voltage switchgear, the voltage by the capacitance (Capacitance) between the high-voltage charging unit and the device The present invention relates to a current transformer for voltage detection, which plays an important role in safety management during power supply, maintenance, and inspection by detecting the condition of a line, phase loss, and the like.

전압검출용소자, 변류기Voltage detection element, current transformer

Description

전압 검출형 변류기{THE CURRENT TRANSFORMER WITH CAPACITIVE VOLTAGE DETECTOR} Voltage Sensing Current Transformers {THE CURRENT TRANSFORMER WITH CAPACITIVE VOLTAGE DETECTOR}             

도 1은 종래의 지지애자형 전압검출기의 정단면도,1 is a sectional front view of a conventional insulator type voltage detector;

도 2는 종래의 전압 검출 기능이 없는 변류기의 정단면도,Figure 2 is a front sectional view of a current transformer without a conventional voltage detection function,

도 3은 본 발명에 따른 전극(electrode)형의 전압검출소자가 내장된 변류기의 정단면도,3 is a front sectional view of a current transformer in which an electrode-type voltage detecting device is incorporated according to the present invention;

도 4는 도 3의 변류기에 내장된 전극(electrode)형의 금속 또는 반도전성 합성수지로된 전압 검출 소자의 사시도,4 is a perspective view of a voltage detecting element made of an electrode-type metal or semiconductive synthetic resin embedded in the current transformer of FIG. 3;

도 5는 본 발명에 따른 환형의 전압검출소자가 내장된 변류기의 정단면도,5 is a front sectional view of a current transformer with a ring-shaped voltage detecting device according to the present invention;

도 6은 도 5의 변류기에 내장된 환형의 금속 또는 반도전성 합성 수지로된 전압검출소자의 사시도,6 is a perspective view of a voltage detecting element made of an annular metal or semiconductive synthetic resin embedded in the current transformer of FIG. 5;

도 7은 본 발명에 따른 원통형의 전압검출소자가 내장된 변류기의 정단면도,7 is a front sectional view of a current transformer incorporating a cylindrical voltage detecting device according to the present invention;

도 8은 도7의 변류기에 내장된 원통형의 금속 또는 반도전성 합성수지로 된 전압 검출 소자의 사시도,8 is a perspective view of a voltage detecting element made of a cylindrical metal or semiconductive synthetic resin embedded in the current transformer of FIG.

도 9는 본 발명에 따른 원통-메쉬(Mesh)형의 전압검출소자가 내장된 변류기의 정단면도,9 is a front sectional view of a current transformer with a cylindrical mesh-type voltage detecting device according to the present invention;

도 10은 도 9의 변류기에 내장된 원통 Mesh 형태의 금속 Screen 전압 검출 소자의 사시도.FIG. 10 is a perspective view of a metal screen voltage detection device having a cylindrical mesh shape built into the current transformer of FIG. 9; FIG.

※도면의 주요 부호 설명※ Explanation of main symbols in drawings

10, 13, 15, 17 : 에폭시 수지 성형부10, 13, 15, 17: epoxy resin molded part

20 : 변류기의 고압측 1차 단자20: high voltage side primary terminal of current transformer

30 : 변류기의 고압측 1차 권선30: primary winding of the high voltage side of the current transformer

40 : 변류기의 저압측 2차 권선 및 철심40: Secondary winding and iron core of low pressure side of current transformer

50 : 전압 검출 소자50: voltage detection element

60 : 전압 검출 단자60: voltage detection terminal

70 : 접지단자70: ground terminal

본 발명은 고전압 수배전반내에 설치되는 변류기의 내부에 전압 검출용 소자(Capacitive voltage dector)를 내장하여 전압 검출과 변류기의 기능을 일체화한 변류기에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a current transformer incorporating a capacitive voltage dector inside a current transformer installed in a high voltage switchgear, integrating the function of voltage detection and current transformer.

종래의 기술로, 도 1은 종래의 지지애자형 전압검출기의 정단면도를 도시한 것이고, 도 2는 종래의 전압 검출 기능이 없는 변류기의 정단면도를 도시한 것이다. 도2에서 12는 에폭시수지 성형부이고, 22는 고압측1차단자이고, 32는 1차권선이고, 42는 2차권선이된 철심이다. In the prior art, FIG. 1 shows a front sectional view of a conventional insulator type voltage detector, and FIG. 2 shows a front sectional view of a current transformer without a conventional voltage detection function. In FIG. 2, 12 is an epoxy resin molded part, 22 is a high-pressure side primary terminal, 32 is a primary winding, and 42 is a secondary winding iron core.

도1 및 도2에서 도시한 바와같이, 지지애자형 전압검출기와 일반 변류기로 구분되어 수배전반에 각각 설치되므로 2중의 설치공간과 기기비용이 소요되고, As shown in Figures 1 and 2, it is divided into a support insulator type voltage detector and a general current transformer are installed in the switchgear each takes a double installation space and equipment cost,

특히 지지애자형 전압검출기는 내장된 세라믹 캐패시터(Ceramic Capacitor)(51)가 온도 변화에 따른 용량의 변화폭이 커서 정밀한 용도로 사용이 어려운 문제점이 있었다. 또한 세라믹 캐패시터(Ceramic capacitor)(51)와 기기를 성형하는데 사용되는 에폭시수지(11)의 선팽창계수가 현저하게 달라 세라믹 캐패시터(Ceramic capacitor)의 계면(52)이 이완되어 부분 방전이 발생하므로 절연이 파괴되는 위험성이 있었다.In particular, the support insulator type voltage detector has a problem in that it is difficult to use the ceramic ceramic capacitor 51 having a large change in capacity according to temperature change for precise use. In addition, the coefficient of linear expansion of the ceramic capacitor 51 and the epoxy resin 11 used to mold the device is remarkably different, so that the interface 52 of the ceramic capacitor is relaxed, so that partial discharge occurs. There was a risk of destruction.

또한, 고압 권선의 고주파 과도 전압으로 인한 고전위의 발생시 저압 권선 으로 고주파 전원의 커플링 효과가 야기되어, 고압 권선과 저압 권선 사이의 절연이 파괴될 경우 고압 변류기의 파손을 가져오는 문제점이 있었다.In addition, when a high potential is generated due to the high frequency transient voltage of the high voltage winding, the coupling effect of the high frequency power supply is caused by the low voltage winding, and when the insulation between the high voltage winding and the low voltage winding is broken, there is a problem of breaking the high voltage current transformer.

본 고안은 상기와 같은 문제점을 해결하기 위해 안출된 것으로, 전압 검출용 소자(Capacitive voltage dector)를 변류기에 내장하여 변류기로서 전압 검출 기능이 있는 2가지 기능을 갖도록 구성하고, 전압 검출용 소자를 전극(electrode)형, 환형, 원통형, 원통-메쉬(Mesh)형태로 구성함으로서, 비용도 저렴하고, 절연 성능및 신뢰성이 우수한 변류기를 제공하는데 그 목적이 있다.
The present invention has been made to solve the above problems, and built a voltage detection element (Capacitive voltage dector) in the current transformer to configure two functions with a voltage detection function as a current transformer, the voltage detection element It is an object of the present invention to provide a current transformer which is low in cost, excellent in insulation performance, and reliable by being configured in an electrode type, an annular shape, a cylindrical shape, and a cylindrical mesh type.

상기와 같은 목적을 달성하기 위해 본 발명의 전압검출형 변류기는, In order to achieve the above object, the voltage detection current transformer of the present invention,

변류기의 상부에 고압측 1차단자(20)가 고정되어 내부로 1차권선(30)이 연결되고, 2차 권선이된 철심(40)과 전압 검출 소자(50)를 1차 권선이 관통하는 구조로 형성하고, 외측에 전압 검출 단자(60)와 접지단자(70)를 형성하고, 그 전압 검출 단자(60)와 접지단자(70)사이에 계측기나 경보기, 표시등이 연결되도록 구성된다.The high voltage side primary terminal 20 is fixed to the upper portion of the current transformer, and the primary winding 30 is connected therein, and the primary winding penetrates the iron core 40 and the voltage detecting element 50 which become secondary windings. It is configured to have a structure, the voltage detection terminal 60 and the ground terminal 70 is formed on the outside, and the instrument, alarm, and indicator light is connected between the voltage detection terminal 60 and the ground terminal 70.

그리고, 전압 검출용 소자는 내장된 변류기로서 고압측 1차권선과 2차 권선이된 철심사이에 고압측 연결부와 접지측이 대칭의 형상인 전극(electrode)형, 환형, 원통형, 원통-메쉬(Mesh)형으로 구성되고, In addition, the voltage detecting element is a built-in current transformer, an electrode-type, annular, cylindrical, cylindrical-mesh having a symmetrical shape between the high voltage side connection part and the ground side between the high voltage side primary winding and the secondary winding core. Mesh),

그 재료는 구리(Cu), 은(Ag) 또는 알루미늄(Al)과 같은 양질의 도전성 재료를 바탕으로 형성된 금속 또는 반도전성 합성수지로 성형되는 것을 특징으로 한다.The material is characterized in that it is molded from a metal or semiconductive synthetic resin formed on the basis of a high quality conductive material such as copper (Cu), silver (Ag) or aluminum (Al).

여기서, 반도전성 합성수지는 3.7~4.5(60Hz)의 유전율을 갖는 에폭시(Epoxy)수지로 성형한다.Here, the semiconducting synthetic resin is molded from an epoxy resin having a dielectric constant of 3.7 to 4.5 (60 Hz).

이하, 본 발명의 바람직한 실시예들을 첨부 도면에 따라 상세히 설명한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 3 및 도4는 본 발명에 따른 전극(electrode)형의 전압검출소자가 내장된 변류기의 정단면도 및 사시도를 도시한 것으로, 이는 변류기의 상부에 고압측 1차단자(23)가 고정되어 내부로 1차권선(33)이 연결되고, 2차 권선이된 철심(43)를 1차 권선이 관통되도록 구성하고, 상기 고압측 1차단자와 2차 권선이된 철심사이의 1차 권선 일측이 전극(electrode)형의 전압검출소자(53)의 접지측과 연결되고, 그 전극형의 전압검출소자의 고압측 연결부(54)이 외측에 형성된 전압검출단자(63)와 연결된다. 3 and 4 illustrate a cross-sectional view and a perspective view of a current transformer in which an electrode-type voltage detecting device is built according to the present invention, and the high-voltage side primary terminal 23 is fixed to an upper portion of the current transformer. The primary winding 33 is connected to the secondary winding, and the primary winding is configured to pass through the iron core 43 which is the secondary winding, and one side of the primary winding between the high voltage side primary terminal and the iron core that is the secondary winding is It is connected to the ground side of the electrode-type voltage detection element 53, and the high voltage side connection portion 54 of the electrode-type voltage detection element is connected to the voltage detection terminal 63 formed on the outside.

그리고, 전압 검출 단자(63)와 접지단자(73)사이에 계측기나 경보기, 표시등을 연결하여 활선 여부를 확인하고, 보수 및 점검시 안전 확보를 위한 전압검출 기능을 제공할 수가 있게 된다.In addition, a measuring instrument, an alarm, and an indicator may be connected between the voltage detecting terminal 63 and the ground terminal 73 to check whether the wire is live and provide a voltage detection function for ensuring safety during maintenance and inspection.

이러한 전극(electrode)형의 전압검출소자(53)는 상기 고압권선과 일정한 간격(10~20mm)을 유지시키고, 고전위 발생시 1차 권선을 따라 흐르는 고주파 전계를 고압측 연결부(54)와 접지측이 대칭의 형상을 통해 효율적으로 완화시킬수 있어 전기적 절연 성능을 향상시키는 효과가 있다.The electrode-type voltage detecting element 53 maintains a constant distance (10 to 20 mm) from the high voltage winding, and when a high potential occurs, a high frequency electric field flowing along the primary winding is connected to the high voltage side connecting portion 54 and the ground side. This symmetrical shape can be effectively alleviated, improving the electrical insulation performance.

또한, 전극(electrode)형의 전압검출소자(53)는 3.7~4.5(60Hz)의 유전율을 갖는 에폭시(Epoxy)수지 및 구리(Cu), 은(Ag) 또는 알루미늄(Al)과 같은 양질의 도전성 재료를 바탕으로 형성된 금속으로 성형됨으로서, 내부 구조물이 안정적으로 고정되어 정전 용량이 균일한 효과를 얻을 수 있다.In addition, the electrode-type voltage detecting element 53 has a high-quality conductivity such as epoxy resin and copper (Cu), silver (Ag), or aluminum (Al) having a dielectric constant of 3.7 to 4.5 (60 Hz). By molding with a metal formed on the basis of the material, the internal structure can be stably fixed to obtain an effect of uniform capacitance.

도 5 및 도6는 본 발명에 따른 환형의 전압검출소자가 내장된 변류기의 정단면도 및 사시도를 도시한 것으로, 이는 변류기의 상부에 고압측 1차단자(25)가 고정되어 내부로 1차권선(35)이 연결되고, 2차 권선이된 철심(45)과 환형의 전압 검출 소자(55)를 1차 권선이 관통되도록 구성하고, 그 환형의 전압검출소자 일측이 외측에 형성된 전압검출단자(65)와 연결된다. 5 and 6 illustrate a cross-sectional view and a perspective view of a current transformer in which an annular voltage detecting device is built according to the present invention, in which a high-voltage side primary terminal 25 is fixed to an upper portion of the current transformer, and a primary winding inwards. 35 is connected, the secondary core of the core 45 and the annular voltage detecting element 55 is configured to pass through the primary winding, one side of the annular voltage detecting element formed on the outside of the voltage detecting terminal ( 65).

그리고, 전압 검출 단자(65)와 접지단자(75)사이에 계측기나 경보기, 표시등을 연결하여 활선 여부를 확인하고, 보수 및 점검시 안전 확보를 위한 전압검출 기능을 제공할 수가 있게 된다.In addition, a measuring instrument, an alarm, and an indicator may be connected between the voltage detection terminal 65 and the ground terminal 75 to check whether the wire is live, and provide a voltage detection function for ensuring safety during maintenance and inspection.

이러한 환형의 전압검출소자는 상기 고압권선과 일정한 간격(10~20mm)을 유지시키고, 고전위 발생시 1차 권선을 따라 흐르는 고주파 전계를 환형의 구조를 통해 효율적으로 완화시킬수 있어 전기적 절연 성능을 향상시키는 효과가 있다.The annular voltage detecting device maintains a constant distance (10-20 mm) from the high voltage winding, and can efficiently alleviate the high frequency electric field flowing along the primary winding through the annular structure when the high potential occurs to improve electrical insulation performance. It works.

또한, 환형의 전압검출소자는 3.7~4.5(60Hz)의 유전율을 갖는 에폭시(Epoxy)수지 및 구리(Cu), 은(Ag) 또는 알루미늄(Al)과 같은 양질의 도전성 재료를 바탕으로 형성된 금속으로 성형됨으로서, 내부 구조물이 안정적으로 고정되어 정전 용량이 균일한 효과를 얻을 수 있다.In addition, the annular voltage detection element is a metal formed based on epoxy resin having a dielectric constant of 3.7 to 4.5 (60 Hz) and a high-quality conductive material such as copper (Cu), silver (Ag), or aluminum (Al). By being molded, the internal structure can be stably fixed to obtain a uniform effect of capacitance.

도 7 및 도8는 본 발명에 따른 본 발명에 따른 원통형의 전압검출소자가 내장된 변류기의 정단면도 및 사시도를 도시한 것으로, 이는 변류기의 상부에 고압측 1차단자(27)가 고정되어 내부로 1차권선(37)이 연결되고, 2차 권선이된 철심(47)과 원통형의 전압 검출 소자(57)를 1차 권선이 관통되도록 구성하고, 그 원통형의 전압검출소자 일측이 외측에 형성된 전압검출단자(67)와 연결된다. 7 and 8 illustrate a front sectional view and a perspective view of a current transformer incorporating a cylindrical voltage detection device according to the present invention, which is fixed inside the high voltage side primary terminal 27 at an upper portion of the current transformer. Primary windings 37 are connected to each other, and the core winding 47 and the secondary voltage winding element 47 are configured to pass through the primary winding, and one side of the cylindrical voltage detection element is formed outside. It is connected to the voltage detection terminal 67.

그리고, 전압 검출 단자(67)와 접지단자(77)사이에 계측기나 경보기, 표시등을 연결하여 활선 여부를 확인하고, 보수 및 점검시 안전 확보를 위한 전압검출 기능을 제공할 수가 있게 된다.In addition, a measuring instrument, an alarm, and an indicator may be connected between the voltage detecting terminal 67 and the ground terminal 77 to check whether the wire is live and provide a voltage detection function for ensuring safety during maintenance and inspection.

이러한 원통형의 전압검출소자는 상기 고압권선과 일정한 간격(10~20mm)을 유지시키고, 고전위 발생시 1차 권선을 따라 흐르는 고주파 전계를 원통형의 구조를 통해 효율적으로 완화시킬수 있어 전기적 절연 성능을 향상시키는 효과가 있다.The cylindrical voltage detecting device maintains a constant distance (10-20mm) from the high voltage winding, and can effectively relax the high frequency electric field flowing along the primary winding when the high potential occurs through the cylindrical structure to improve electrical insulation performance. It works.

또한, 원통형의 전압검출소자는 3.7~4.5(60Hz)의 유전율을 갖는 에폭시(Epoxy)수지 및 구리(Cu), 은(Ag) 또는 알루미늄(Al)과 같은 양질의 도전성 재료를 바탕으로 형성된 금속으로 성형됨으로서, 내부 구조물이 안정적으로 고정되어 정전 용량이 균일한 효과를 얻을 수 있다.In addition, the cylindrical voltage detection element is a metal formed from an epoxy resin having a dielectric constant of 3.7 to 4.5 (60 Hz) and a high-quality conductive material such as copper (Cu), silver (Ag), or aluminum (Al). By being molded, the internal structure can be stably fixed to obtain a uniform effect of capacitance.

도 9 및 도10은 본 발명에 따른 원통-메쉬(Mesh)형의 전압검출소자가 내장된 변류기의 정단면도 및 사시도를 도시한 것으로, 이는 변류기의 상부에 고압측 1차단자(20)가 고정되어 내부로 1차권선(30)이 연결되고, 2차 권선이된 철심(40)과 원통-메쉬(Mesh)형의 전압 검출 소자(50)를 1차 권선이 관통되도록 구성하고, 그 원통-메쉬(Mesh)형의 전압검출소자 일측이 외측에 형성된 전압검출단자(60)와 연결된다. 9 and 10 illustrate a cross-sectional view and a perspective view of a current transformer in which a cylindrical mesh-type voltage detecting device is built according to the present invention, in which the high voltage side primary terminal 20 is fixed to an upper portion of the current transformer. The primary winding 30 is connected to the inside thereof, and the core winding 40 and the cylindrical mesh-type voltage detection element 50 having the secondary winding are configured to penetrate the primary winding. One side of the mesh type voltage detecting element is connected to the voltage detecting terminal 60 formed on the outside.

그리고, 전압 검출 단자(60)와 접지단자(70)사이에 계측기나 경보기, 표시등을 연결하여 활선 여부를 확인하고, 보수 및 점검시 안전 확보를 위한 전압검출 기능을 제공할 수가 있게 된다.In addition, a measuring instrument, an alarm, and an indicator may be connected between the voltage detection terminal 60 and the ground terminal 70 to check whether the wire is live, and provide a voltage detection function for ensuring safety during maintenance and inspection.

이러한 원통-메쉬(Mesh)형의 전압검출소자는 상기 고압권선과 일정한 간격(10~20mm)을 유지시키고, 고전위 발생시 1차 권선을 따라 흐르는 고주파 전계를 원통-메쉬(Mesh)형의 얇은 금속 스크린(Screen)구조를 통해 효율적으로 완화시 킬수 있어 전기적 절연 성능을 향상시키는 효과가 있다.The cylindrical mesh-type voltage detecting device maintains a constant distance (10-20 mm) from the high-voltage winding and transmits a high-frequency electric field flowing along the primary winding when a high potential occurs, and is a thin metal mesh-shaped mesh. Screen structure can be effectively alleviated to improve electrical insulation performance.

또한, 원통-메쉬(Mesh)형의 전압검출소자는 3.7~4.5(60Hz)의 유전율을 갖는 에폭시(Epoxy)수지 및 구리(Cu), 은(Ag) 또는 알루미늄(Al)과 같은 양질의 도전성 재료를 바탕으로 형성된 금속으로 성형됨으로서, 내부 구조물이 안정적으로 고정되어 정전 용량이 균일한 효과를 얻을 수 있다.In addition, the cylindrical mesh-type voltage detector is a high-quality conductive material such as epoxy resin and copper (Cu), silver (Ag), or aluminum (Al) having a dielectric constant of 3.7 to 4.5 (60 Hz). By being formed of a metal formed on the basis of the structure, the internal structure can be stably fixed to obtain an effect of uniform capacitance.

이처럼, 종래에 수배전반내에 지지애자형 전압 검출기와 변류기를 별개로 설치하므로 설치개소 및 기기비용이 2중으로 소요되었으나, 본 발명은 변류기 내부에 전압 검출 기능을 내장하므로 설치공간을 감소시키고, 변류기와 전압 감지기를 일체화 하므로 기기의 원가를 절감시킬수가 있다.As described above, since the support insulator type voltage detector and the current transformer are separately installed in the switchgear, the installation place and the equipment cost are doubled. However, the present invention reduces the installation space because the voltage detection function is built into the current transformer. By integrating the detector, the cost of the device can be reduced.

이상에서 본 발명의 특정 실시예를 예시하여 본 발명의 기술적 사상을 설명하였다. 그러나, 본 발명의 기술적 사상이 상기 실시예에 한정되는 것이 아니며, 첨부된 등록청구범위에 의해 결정되는 것이다.The technical spirit of the present invention has been described above by exemplifying specific embodiments of the present invention. However, the technical idea of the present invention is not limited to the above embodiment, but is determined by the appended claims.

이상에서 설명한 바와 같이 종래에는 지지애자형 전압검출기를 단독으로 사용하고 있으나 본 발명은 전압 검출용 소자(Capacitive voltage dector)를 변류기에 내장하여 변류기로서 전압 검출 기능이 있는 2가지 기능을 일체화한 경제적인 기기인 것이며, 특히 종래에는 전압 검출용 소자로 Ceramic Capacitor를 사용하므로 Epoxy 수지와 물리적, 기계적 특성의 차이로 절연내력이 저하되어 신뢰성에 문 제가 있으나, 본 발명은 반도전성 합성수지 또는 Mesh형태의 금속 Screen을 사용하므로 종래 기기의 문제를 개선하였으며 본 발명 기기에 사용되는 Epoxy 수지는 온도 특성이 우수하여 검출 전압이 안정적이므로 정밀기기용으로 활용할 수 있는 좋은 효과가 있다.As described above, in the related art, the support insulator type voltage detector is used alone, but the present invention integrates two functions having a voltage detection function as a current transformer by embedding a capacitive voltage dector in the current transformer. In particular, since a ceramic capacitor is used as a device for voltage detection, the insulation strength is lowered due to the difference between the epoxy resin and the physical and mechanical properties. However, the present invention is a semi-conductive synthetic resin or a mesh-type metal screen. Since the problem of the conventional device is improved, the epoxy resin used in the device of the present invention has excellent temperature characteristics, and thus has a good effect that can be utilized for precision devices because the detection voltage is stable.

Claims (8)

고전압 수배전반내에 설치되는 변류기에 있어서,In the current transformer installed in the high voltage switchgear, 변류기의 상부에 고압측 1차단자(20)가 고정되어 내부로 1차권선(30)이 연결되고, 2차 권선이된 철심(40)과 전압 검출용 소자(50)를 1차 권선이 관통되는 구조로 형성하고, 외측에 전압 검출 단자(60)와 접지단자(70)를 형성하여 그 전압 검출 단자(60)와 접지단자(70)사이에 계측기나 경보기, 표시등이 연결되도록 구성하는 것을 특징으로 하는 전압검출형 변류기.The high voltage side primary terminal 20 is fixed to the upper portion of the current transformer, and the primary winding 30 is connected therein, and the primary winding penetrates the iron core 40 and the voltage detecting element 50 which are secondary windings. And a voltage detecting terminal 60 and a ground terminal 70 formed on the outside thereof so that a measuring instrument, an alarm, and an indicator light are connected between the voltage detecting terminal 60 and the ground terminal 70. Voltage-detecting current transformer. 제1항에 있어서, 전압 검출용 소자는 내장된 변류기로서 고압측 1차권선과 2차 권선이된 철심사이에 접지측과 고압측 연결부(54)이 대칭의 형상인 전극(electrode)형(53)으로 구성되는 것을 특징으로 하는 전압검출형 변류기.The electrode for voltage detection according to claim 1, wherein the voltage detecting element is a built-in current transformer, in which an electrode type 53 having a symmetrical shape between the ground side and the high voltage side connection portion 54 is formed between the high voltage side primary winding and the secondary winding core. Voltage detection type current transformer, characterized in that consisting of. 제1항에 있어서, 전압 검출용 소자는 내장된 변류기로서 고압측 1차권선과 2차 권선이된 철심사이에 환형(55)으로 구성되는 것을 특징으로 하는 전압검출형 변류기.The voltage detecting type current transformer according to claim 1, wherein the voltage detecting element is a built-in current transformer having an annular shape (55) between the high voltage side primary winding and the iron core of the secondary winding. 제1항에 있어서, 전압검출용 소자는 내장된 변류기로서 고압측 1차권선과 2차 권선이된 철심사이에 원통형(57)으로 구성되는 것을 특징으로 하는 전압검출형 변류기.The voltage detection type current transformer according to claim 1, wherein the voltage detection element is a built-in current transformer and is formed in a cylindrical shape (57) between the high voltage side primary winding and the iron core of the secondary winding. 제1항에 있어서, 전압검출용 소자는 내장된 변류기로서 고압측 1차권선과 2차 권선이된 철심사이에 원통-메쉬(Mesh)형(50)으로 구성되는 것을 특징으로 하는 전압검출형 변류기.2. The voltage detecting current transformer according to claim 1, wherein the voltage detecting element is a built-in current transformer and has a cylindrical-mesh type 50 between the high-voltage primary winding and the iron core of the secondary winding. . 제1항 내지 제5항에 있어서, 전압 검출용 소자는 도전성 재료와 반도전성 합성수지로 성형되는 것을 특징으로 하는 전압검출형 변류기.The voltage detecting current transformer according to any one of claims 1 to 5, wherein the voltage detecting element is formed of a conductive material and a semiconductive synthetic resin. 제6항에 있어서, 도전성 재료는 구리(Cu), 은(Ag), 알루미늄(Al) 중 어느 1종이상 선택하여 성형하고, 반도전성 합성수지는 에폭시 수지로 성형하는 것을 특징으로 하는 전압검출형 변류기.7. The voltage detecting current transformer according to claim 6, wherein the conductive material is selected from at least one of copper (Cu), silver (Ag), and aluminum (Al), and the semiconductive synthetic resin is formed of an epoxy resin. . 제7항에 있어서, 에폭시 수지는 3.7~4.5(60Hz)의 유전율을 갖는 것을 특징으로 하는 전압검출형 변류기.8. The voltage detecting current transformer of claim 7, wherein the epoxy resin has a dielectric constant of 3.7 to 4.5 (60 Hz).
KR1020040078802A 2004-10-04 2004-10-04 The current transformer with capacitive voltage detector KR100580594B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020040078802A KR100580594B1 (en) 2004-10-04 2004-10-04 The current transformer with capacitive voltage detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020040078802A KR100580594B1 (en) 2004-10-04 2004-10-04 The current transformer with capacitive voltage detector

Publications (2)

Publication Number Publication Date
KR20060029934A KR20060029934A (en) 2006-04-07
KR100580594B1 true KR100580594B1 (en) 2006-05-16

Family

ID=37140107

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020040078802A KR100580594B1 (en) 2004-10-04 2004-10-04 The current transformer with capacitive voltage detector

Country Status (1)

Country Link
KR (1) KR100580594B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111323630B (en) * 2018-12-14 2024-04-30 大连北方互感器集团有限公司 Current transformer capable of live-line actually-measured capacitance change
CN109448976A (en) * 2018-12-30 2019-03-08 无锡市电力滤波有限公司 A kind of compound mutual inductor and preparation method thereof being exclusively used in high pressure self healing capacitor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR930024034A (en) * 1992-05-30 1993-12-21 김승용 Sensor built-in transformer
JPH09113541A (en) * 1995-10-16 1997-05-02 Nissin Electric Co Ltd Voltage detecting device
KR200270823Y1 (en) 2001-12-21 2002-04-03 한국전력공사 Pole transformer for having a function sensing voltage and current
JP2003217955A (en) 2002-01-18 2003-07-31 Toshiba Corp Monitor for stationary induction apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR930024034A (en) * 1992-05-30 1993-12-21 김승용 Sensor built-in transformer
JPH09113541A (en) * 1995-10-16 1997-05-02 Nissin Electric Co Ltd Voltage detecting device
KR200270823Y1 (en) 2001-12-21 2002-04-03 한국전력공사 Pole transformer for having a function sensing voltage and current
JP2003217955A (en) 2002-01-18 2003-07-31 Toshiba Corp Monitor for stationary induction apparatus

Also Published As

Publication number Publication date
KR20060029934A (en) 2006-04-07

Similar Documents

Publication Publication Date Title
US8395397B1 (en) High voltage sensing capacitor and indicator device
US7064267B2 (en) Gas insulating apparatus and method for locating fault point thereof
US7027280B2 (en) Gas insulating apparatus and method for locating fault point thereof
CN105428007B (en) A kind of combined electrical apparatus of multigroup capacitance plate insulation core body
CN106716148A (en) Voltage sensing device
US20120098519A1 (en) Sensor assembly, trip unit including the same, and method of manufacturing a sensor assembly
US20180100878A1 (en) Sensing device for an electrical system
CN107957529B (en) Method and apparatus for testing current connections of a high voltage condenser bushing assembly
KR20170009904A (en) Sensored electrical jumper
CN202534496U (en) Electronic current-voltage transformer
EP0851442B1 (en) Lead-in insulator
WO2017148159A1 (en) Large-capacitance insulation core body, high-voltage electrical apparatus and multi-functional high-voltage bushing
JP5224825B2 (en) Insulation monitoring device
KR100580594B1 (en) The current transformer with capacitive voltage detector
CN104267235A (en) Hoop voltage sensing device
RU2640315C1 (en) Adjustable capacitive sensor of high voltage
CN114222925B (en) Measurement of voltage on metal-encapsulated switching devices
JP2006337357A (en) Voltage detection system
WO2015049725A1 (en) Partial discharge sensor
KR200440147Y1 (en) The current transformer with capacitive voltagedetector
CN217133245U (en) Conductive sleeve with temperature monitoring, current monitoring and voltage detection functions
JPS6111522B2 (en)
KR101175738B1 (en) Device for detecting leakage current of insulator
KR101053953B1 (en) Signal transmission device for high voltage power line communication
KR100490896B1 (en) Ceramic coupling capacitor for partial discharge measurement

Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20130506

Year of fee payment: 8

FPAY Annual fee payment

Payment date: 20140507

Year of fee payment: 9

FPAY Annual fee payment

Payment date: 20160504

Year of fee payment: 11

FPAY Annual fee payment

Payment date: 20170428

Year of fee payment: 12

FPAY Annual fee payment

Payment date: 20180503

Year of fee payment: 13

FPAY Annual fee payment

Payment date: 20190509

Year of fee payment: 14