KR20000060638A - Multi-stress bdv cell - Google Patents

Multi-stress bdv cell Download PDF

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Publication number
KR20000060638A
KR20000060638A KR1019990009124A KR19990009124A KR20000060638A KR 20000060638 A KR20000060638 A KR 20000060638A KR 1019990009124 A KR1019990009124 A KR 1019990009124A KR 19990009124 A KR19990009124 A KR 19990009124A KR 20000060638 A KR20000060638 A KR 20000060638A
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South Korea
Prior art keywords
cell
stress
insulator
oil
bdv
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KR1019990009124A
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Korean (ko)
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KR100290274B1 (en
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하영길
이상진
이수길
김영성
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권문구
엘지전선 주식회사
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/02—Measuring force or stress, in general by hydraulic or pneumatic means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/26—Auxiliary measures taken, or devices used, in connection with the measurement of force, e.g. for preventing influence of transverse components of force, for preventing overload

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Relating To Insulation (AREA)
  • Housings And Mounting Of Transformers (AREA)

Abstract

PURPOSE: A multi stress BDV cell is provided to safely measure insulation breaking voltage of an insulation element before breaking environmental medium by changing a stress state of the insulation element by the medium such as a buried metal element and the applying voltage. CONSTITUTION: A multi stress BDV cell includes upper and lower cells(19,20) formed with an insulator(13) on a partition, a buried metal element(16) penetrating the upper and lower cells and having an upper part applied to an upper electrode(15) and a lower part applied to an insulating element(17) and a lower electrode(18), and high and low temperature oil tubs(11,12) for supplying oil to the upper and lower cells, wherein high temperature oil in the high temperature oil tub is supplied to the upper cell by a pump(13) and low temperature oil in the low temperature oil tub is supplied to the lower cell by the pump.

Description

멀티 스트레스 절연파괴전압 측정용 셀 {Multi-stress BDV Cell}Multi-stress breakdown voltage measurement cell {Multi-stress BDV Cell}

본 발명은 에폭시 절연체의 절연파괴 전압을 측정하는데 있어서, 전기적 절연강도를 열에 의한 기계적인 응력의 변화를 측정할 수 있도록 한 장치에 관한 것이다.The present invention relates to an apparatus for measuring the change in mechanical stress caused by heat in electrical insulation strength in measuring the breakdown voltage of an epoxy insulator.

종래의 기술은 절연체의 절연내력을 평가하기 위한 원판형의 시료를 상부의 구 전극과 하부의 평판전극 사이에 설치하고 전압을 인가하여 파괴전압 또는 내전압을 측정하고, 고체 절연체는 액체나 기체에 비해 파괴 강도가 높아 고체 절연파괴 이전에 주변 매질의 파괴가 국부적으로 일어나 그것에 의해 고체 절연 파괴가 유기되는 경우가 있으므로 보통 시편 시험의 경우 기중으로의 파괴를 방지 하기 위하여 절연유 속에 담궈서 시험한다. 이때도 마찬가지로 전극, 절연체 절연유의 3중점에서 파괴가 일어나 실제 절연체의 정확한 절연내력을 평가하기 어렵고, 실제 사용상에 있어서 열에 의한 많은 응력을 받는 절연물에 대해서 평가 시험이 불가능하다. 즉 에폭시 절연체의 절연파괴전압 측정방법으로는 절연유에서 절연파괴가 먼저 발생하는 경우가 많고 이에 따라서 실제 절연체의 전기적 특성에 의한 정확한 파괴전압 데이터를 구할 수 없었으며, 에폭시 절연체를 사용할 때는 금속전극을 절연체 내에 매입하는데 매입된 전극의 열팽창율과 에폭시절연체의 열팽창율이 서로 달라서 금속전극과 에폭시 계면에 기계적 응력이 발생하여 절연내력을 상승 또는 저하시키는 문제점이 있었다.In the conventional technology, a disc shaped sample for evaluating the dielectric strength of an insulator is installed between an upper sphere electrode and a lower plate electrode, and a breakdown voltage or breakdown voltage is measured by applying a voltage, and the solid insulator is compared with liquid or gas. Since the breakdown medium has a high breakdown strength and local breakdown of the surrounding medium occurs before the solid breakdown, the solid breakdown may be induced by it. In the case of the specimen test, it is usually immersed in insulating oil to prevent breakdown into air. In this case as well, breakdown occurs at the triple points of the electrode and the insulator insulating oil, so that it is difficult to evaluate the exact dielectric strength of the actual insulator, and it is impossible to evaluate the insulator that is subjected to a lot of stress due to heat. In other words, as the method of measuring the breakdown voltage of epoxy insulator, the breakdown occurs frequently in the insulating oil. Accordingly, accurate breakdown voltage data due to the electrical characteristics of the insulator could not be obtained. Since the thermal expansion rate of the embedded electrode and the thermal expansion rate of the epoxy insulator are different from each other, mechanical stress occurs at the metal electrode and the epoxy interface to increase or decrease the dielectric strength.

- 발명의 목적-Purpose of the invention

종래의 파괴 전압의 측정시험은 절연물이 상. 하 전극에 직접 밀착되어 인가된 전압에 의해 일정한 온도에서의 파괴를 측정하는 것이였으나, 절연물의 일정한 온도에 이르기 전에 주변 매질이 파괴되어 순수한 절연물의 파괴온도를 측정하기 어려운 점을 고려한 것이므로, 에폭시 절연체 내에 형성된 고온의 셀과 저온의 셀에 한 개의 매입금구를 형성하고 고온의 매입금구에는 금속전극을 매입하고 저온의 매입금구에는 절연물과 금속전극을 매입한 후, 고온의 셀에는 고온의 오일을 주입하고 저온의 셀에는 저온의 오일을 주입하여 매입금구와 절연물의 필요 온도에서 전압은 인가하고 파괴전압을 안전하고 정확하게 측정할 수 있는 장치를 제공하는데 그 목적이 있다Conventional breakdown voltage measurement tests have an insulator. Although the breakdown at constant temperature was measured by the voltage applied in close contact with the lower electrode, it was considered that it is difficult to measure the breakdown temperature of the pure insulator because the surrounding medium is destroyed before reaching the constant temperature of the insulator. One buried bracket is formed in the hot and cold cells formed therein, the metal electrode is buried in the hot buried bracket, the insulator and the metal electrode are buried in the hot buried bracket, and hot oil is injected into the hot cell. The purpose is to provide a device that can inject low-temperature oil into the low-temperature cell to apply voltage at the required temperature of the buckle and insulator and to measure the breakdown voltage safely and accurately.

- 기술적과제-Technical task

본 발명은 절연물의 응력(변화하고자하는힘) 발생의 구성에서 시작된다. 상기와 같이 절연물의 응력을 구성하기 위하여, 2개의 셀을 상. 하로 형성하고 상기 셀과 셀 사이에는 단열재를 형성한다. 상. 하셀에 한 개의 매입금구를 형성하여 상부는 전극을 인가할 수 있게 형성하고 하부는 절연물과 밀착 결합되게 구성하여 매입금구를 전극과 절연물 사이에 위치시킨다.The present invention begins with the construction of the generation of stress (force to change) of an insulation. In order to construct the stress of the insulator as described above, two cells are phased. And a heat insulating material between the cell and the cell. Prize. One buried bracket is formed in the lower cell so that the upper part is formed so that the electrode can be applied and the lower part is tightly coupled with the insulator, thereby placing the buried bracket between the electrode and the insulator.

또한 고온(상부)셀과 저온(하부)셀에 기름을 유입시키는 유조는 그 차이에 의해 매입금구에 연계된 절연물의 응력이 발생할 수 있는 온도가 지속적으로 유지될 수 있도록 구성되어야 한다.In addition, the oil tank that introduces oil into the high temperature (upper) cell and the low temperature (lower) cell should be constructed so that the temperature at which the stress of the insulator connected to the buried tool can be continuously maintained by the difference.

도 1은 종래의 BDV 장치1 is a conventional BDV device

도 2는 본 발명의 BDV 장치2 is a BDV device of the present invention.

[도면의주요부분에대한부호의설명][Description of the symbols on the main parts of the drawings]

11 : 고온유조 12 : 저온유조11: high temperature oil tank 12: low temperature oil tank

13 : 펌프 14 : 단열재13: pump 14: heat insulating material

15 : 상부전극 16 : 매입금구15: upper electrode 16: embedding bracket

17 : 절연물 18 : 하부전극17: insulator 18: lower electrode

19 : 고온셀 20 : 저온셀19: high temperature cell 20: low temperature cell

- 발명의구성-Composition of Invention

본 발명은 고온과 저온으로 온도를 유지시킬 수 있는 유조(11,12)와 상기 유조(11,12)의 오일을 순환시키는 펌프(13)와 상. 하 칸막이가 단열재(14)로 구성된 고온셀(19)과 저온셀(20), 상기 2개의 셀(19,20)의 상. 하에 걸쳐 설치된 매입금구(16)와 상기 매입금구(16) 상. 하에 절연물(17)을 측정하기 위한 상부전극(15)과 하부전극(18)으로 구성되는 것을 특징으로 한다.The present invention relates to an oil tank (11, 12) capable of maintaining temperature at high and low temperatures and a pump (13) for circulating oil in the oil tank (11, 12). The upper partition of the lower cell is composed of a heat insulating material (14), the cold cell (20), the two cells (19, 20). Over the purchase bracket 16 and the purchase bracket 16 installed over the bottom. It is characterized by consisting of an upper electrode 15 and a lower electrode 18 for measuring the insulator 17 under.

- 발명의작용-Action of the invention

도 1은 종래의 절연파괴전압을 측정하기 위한 구성을 도시하기 위한 것이며, 도 2는 본 발명의 절연물 파괴 전압을 측정하기 위한 장치의 구성을 도시하기 위한 것이다.FIG. 1 is a diagram showing a configuration for measuring a conventional breakdown voltage, and FIG. 2 is a diagram showing a configuration of a device for measuring an insulation breakdown voltage of the present invention.

단열재(14)로 칸막이를 형성한 상. 하셀(19,20)에 도 2에 도시된 것과 같이 상. 하로 매입금구(16)가 설치된다. 상부셀(19)의 매입금구(16)에는 상부전극(15)이 결합할 수 있도록 형성되고 하부셀(20)의 매입금구(16)에는 절연물(17)과 하부전극(200이 결합 형성된다. 또한 상기 셀(19,20)의 일측에 고온유조(11)와 저온유조(12)가 설치되고 고온유조(11)의 오일은 상부셀(19)에 공급하도록 형성되고 저온유조(12)의 오일은 하부셀(20)에 공급하도록 형성되며 상기 유조(11,12)와 셀(19,20)의 사이에는 오일을 순환시키는 펌프(13)가 형성된다.The image which formed the partition by the heat insulating material 14. Phase as shown in FIG. 2 in Hassel (19, 20). The purchase bracket 16 is provided below. The upper electrode 15 is formed to be coupled to the upper electrode 15 so that the upper electrode 15 may be coupled thereto, and the insulator 17 and the lower electrode 200 may be formed to be coupled to the embedded metal outlet 16 of the lower cell 20. In addition, the high temperature oil tank 11 and the low temperature oil tank 12 are installed at one side of the cells 19 and 20, and the oil of the high temperature oil tank 11 is formed to supply the upper cell 19 and the oil of the low temperature oil tank 12. Is formed to supply to the lower cell 20 and a pump 13 for circulating oil is formed between the oil tanks 11 and 12 and the cells 19 and 20.

- 실시예에 의한 작용의설명-Description of the action by the embodiment

고온유조(11)의 오일을 펌프(13)에 의해 상부셀(19)에 공급하여 고온으로 상부셀(19)의 매입금구(16)를 가열하고, 저온유조(12)의 오일을 펌프(13)에 의해 하부셀(20)에 공급하여 상부 매입금구(16)는 고온으로 일정시간동안 응력상태 까지 가열한다. 또한 하부 매입금구(16)는 저온으로 일정시간동안 응력상태 까지 냉각시킨다. 따라서 하부셀(20)의 매입금구(16)가 냉각되면 절연물(17)도 냉각되므로 절연물(17) 역시 응력상태가 된다.The oil of the high temperature oil tank 11 is supplied to the upper cell 19 by the pump 13, and the embedding opening 16 of the upper cell 19 is heated at high temperature, and the oil of the low temperature oil tank 12 is pumped 13 By supplying to the lower cell 20 by the upper buried bracket 16 is heated to a stress state for a predetermined time at a high temperature. In addition, the lower buried bracket 16 is cooled to a stress state for a predetermined time at a low temperature. Therefore, when the buckle 16 of the lower cell 20 is cooled, the insulator 17 is also cooled, so that the insulator 17 is also in a stressed state.

상기와 같이 절연물(17)이 응력상태가 되었다고 인식되면 상부전극(15)과 하부전극(18)에 전압을 인가하여 절연물(17)의 절연파괴전압을 측정한다.When it is recognized that the insulator 17 is in a stress state as described above, a voltage is applied to the upper electrode 15 and the lower electrode 18 to measure the breakdown voltage of the insulator 17.

본 발명에 의한 측정장치는 매입금구와 같은 매개물에 의해 절연물을 응력상태 까지 변화시키고 전압이 인가되는 것이므로 주위의 매개물 파괴 이전에 안전하게 절연물의 절연파괴전압을 측정할 수 있다.In the measuring apparatus according to the present invention, the insulation is changed to a stress state by a medium such as a buckle, and a voltage is applied, so that the breakdown voltage of the insulation can be safely measured before the surrounding medium is destroyed.

Claims (2)

에폭시유니트의 절연물의 절연파괴전압의 측정에 있어서, 칸막이에 단열재(13)를 형성한 상. 하셀(19,20)과 상기 상. 하셀(19,20)을 관통하여 상부는 상부전극(15)에 하부는 절연물(17)과 하부전극(18)에 인가되는 매입금구(16)와 상기 상. 하셀(19,20)에 오일을 공급하는 유조(11,12)로 구성되는 것을 특징으로 하는 멀티 스트레스 BDV 측정용 셀(Multi stress BDV cell)The phase in which the heat insulating material 13 was formed in the partition in the measurement of the dielectric breakdown voltage of the insulator of an epoxy unit. Hassel (19, 20) and the phase. Through the lower cells (19, 20), the upper portion of the upper electrode (15) and the lower portion of the insulator (17) and the lower electrode (18) is applied to the buckle 16 and the image. Multi stress BDV cell, characterized in that consisting of oil tanks (11, 12) for supplying oil to the lower cell (19, 20) 제1항에 있어서, 유조(11,12)는 고온유조(11)와 저온유조(12)로 형성되고 고온유조(11)의 고온오일은 펌프(13)에 의해 상부셀(19)에 공급되고 저온유조(12)의 저온오일은 펌프(13)에 의해 하부셀(20)에 공급되는 것을 특징으로 하는 멀티 스트레스 BDV 측정용 셀(Multi stress BDV cell)The oil tank (11, 12) is formed of a hot oil tank (11) and a low temperature oil tank (12) and the hot oil of the hot oil tank (11) is supplied to the upper cell (19) by a pump (13) The low stress oil in the low temperature oil tank 12 is supplied to the lower cell 20 by the pump 13 (Multi stress BDV cell)
KR1019990009124A 1999-03-18 1999-03-18 Multi-stress BDV Cell KR100290274B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100435066B1 (en) * 2001-10-17 2004-06-09 엘지전선 주식회사 The apparatus measuring dielectric strength of insulating material
KR100454676B1 (en) * 2002-03-14 2004-11-05 엘지전선 주식회사 The multi-electrode cells for measurement of the dielectric strength

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101723198B1 (en) 2017-01-20 2017-04-05 세아전설(주) Insulation breakdown test equipment using paschens law and method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100435066B1 (en) * 2001-10-17 2004-06-09 엘지전선 주식회사 The apparatus measuring dielectric strength of insulating material
KR100454676B1 (en) * 2002-03-14 2004-11-05 엘지전선 주식회사 The multi-electrode cells for measurement of the dielectric strength

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