KR910007692B1 - Cable connecting insulated unit detecting system and method - Google Patents

Cable connecting insulated unit detecting system and method Download PDF

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KR910007692B1
KR910007692B1 KR1019890007418A KR890007418A KR910007692B1 KR 910007692 B1 KR910007692 B1 KR 910007692B1 KR 1019890007418 A KR1019890007418 A KR 1019890007418A KR 890007418 A KR890007418 A KR 890007418A KR 910007692 B1 KR910007692 B1 KR 910007692B1
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electrode
insulating
insulator
test
unit
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KR900018691A (en
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권혁삼
전승익
양지성
이광철
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금성전선 주식회사
홍종선
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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

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  • General Physics & Mathematics (AREA)
  • Testing Relating To Insulation (AREA)

Abstract

The testing apparatus tests the withstand-voltage and fracture strength of polyethylene high-voltage cables. The testing apparatus of insulated unit comprises cylinderical insulated box (4) provided for cover (3) on the insulating member (2), circular insulated-supporter (6) formed with concave groove at upper parts, electrode rod (9) and shield ring (11). The inner of insulated box (4) includes insulating gas or oil in vacuum state.

Description

케이블 접속부용 절연유니트의 시험장치 및 그 방법Testing apparatus and method for insulation unit for cable connection

제1도는 본 발명 시험장치의 종단면 구성도.1 is a longitudinal cross-sectional view of the test apparatus of the present invention.

제2도는 본 발명에 적용되는 절연유니트의 일부단면 구성도.2 is a partial cross-sectional view of an insulation unit applied to the present invention.

제3도는 종래 절연유니트의 시험상태를 나타낸 절연접속부 구조의 일부단면 구성도.3 is a partial cross-sectional view of an insulated joint structure showing a test state of a conventional insulated unit.

* 도면의 주요 부분에 대한 부호의 설명* Explanation of symbols for the main parts of the drawings

1 : 전극장치 2 : 절연기판1 electrode device 2 insulating board

4 : 절연체통 6 : 절연지지부4: insulator cylinder 6: insulation support

7 : 금속접지전극 9 : 전극봉7: metal ground electrode 9: electrode

11 : 실드링11: shield ring

본 발명은 폴리에틸렌 절연고압케이블의 직선접속부에 사용되는 절연유니트에 있어서, 절연유니트의 시험장치 및 그 방법에 관한 것으로 특히, 내전압 및 파괴강도 시험을 위한 시험장치 및 방법을 개선하여 보다 간편 용이하게 시험을 행하도록 하려는 것이다.The present invention relates to a testing apparatus and a method of the insulating unit in the insulation unit used in the linear connection of the polyethylene insulated high-voltage cable, and in particular, to improve the test apparatus and method for the breakdown voltage and breakdown strength test more easily and easily To do it.

일반적으로 폴리에틸렌 절연 고압케이블 테이프 몰드 방식의 절연접속부에서 외부차폐층간의 절연을 위하여 사용되는 절연유니트의 전기적 성능평가를 위한 시험에는 재료물성, 내전압 및 파괴강도에 의한 시험이 있으나, 이중 그 기능에 대한 가장 유효한 시험은 내전압 및 파괴강도에 의한 시험이다.In general, a test for electrical performance evaluation of an insulation unit used for insulation between external shielding layers in an insulation connection of a polyethylene insulated high voltage cable tape mold type includes a test based on material properties, withstand voltage, and breaking strength. The most valid tests are those withstand voltage and breaking strength.

그러나 내전압 및 파괴강도에 의한 시험을 행하기 위해서는 제3도 실제 케이블 포설시와 같이 케이블 절연체와 미가교 테이프로 형성시킨 절연부(20)에 절연유니트(21)를 삽입하고 테이프 몰딩을 하여 절연접속부(22)를 조립한 후, 도체(23)에서 외부차폐층(24)(24')간에 전압을 걸리게 하면 전압은 점선수치와 같이 분포하게 된다.However, in order to perform the test according to the breakdown voltage and the breakdown strength, the insulating unit 21 is inserted into the insulating unit 20 formed of the cable insulator and the uncrosslinked tape as in the actual cable installation of FIG. After assembling (22), when the voltage is applied between the outer shielding layers 24 and 24 'in the conductor 23, the voltage is distributed like a dotted line value.

즉, 실제로 시험을 행할 때 절연유니트 부분에 가해지는 전압은 도체(23)와 외부차폐층(24)(24')간에 인가된 시험 전압의 10% 미만의 낮은 전압치만 걸리게 됨에도 불구하고 이를 행하기 위해서는 절연접속부 및 전압인가용 단말을 완전히 조립하여야 하는 제약조건이 수반되어 다음과 같은 많은 문제점이 내재되는 것이었다.That is, the voltage applied to the insulation unit when actually performing the test is performed even though only a low voltage value of less than 10% of the test voltage applied between the conductor 23 and the external shield layer 24, 24 'is applied. In order to do this, there are many problems inherent in the following, which are accompanied by the constraint that the insulation connection and the terminal for voltage application are completely assembled.

첫째 : 시험을 행하기 위한 부수적인 시험공사가 커지게 되어 이에 따른 시험비용이 많이 소요됨.First: As the additional test work to conduct the test grows, the test cost is high.

둘째 : 시험공사의 준비시간이 길어짐.Second: The preparation time for the test construction is longer.

셋째 : 절연접속부 및 전압인가용 단말내에서 절연유니트의 테이프가 같이 몰드되어 버리기 때문에 파괴시 절연유니트 외의 다른 요인에 의한 파괴가 일어날 가능성이 높게 됨과 아울러 파괴원인이 분석도 복잡해짐.Third: Since the tape of the insulation unit is molded together in the insulated connection part and the terminal for voltage application, the possibility of destruction by other factors besides the insulation unit increases, and the cause of failure is complicated.

이같은 제반 문제점에 의하여 기존의 내전압 및 파괴 강도에 의한 시험은 경제성 및 작업성면에서 매우 부적합한 것이었다.Due to these problems, the existing tests based on the breakdown voltage and breaking strength were very inadequate in terms of economy and workability.

따라서 본 발명은 이같은 제반 문제점을 해결하기 위하여 절연유니트의 시험에 수반되는 시험비용과 시간의 소모등 내전압 및 파괴강도 시험의 비효율성을 개선하기 위하여 절연접속부에서와 같은 전계 분포를 형성한 전극장치를 모의 제작하고 이를 이용하여 절연유니트의 단품상태에서 내전압 및 파괴강도에 의한 시험을 행하려 함에 그 목적이 있는 것이다.Therefore, in order to solve such problems, the present invention provides an electrode device having the same electric field distribution as that of an insulation connection in order to improve the inefficiency of the breakdown voltage test and the breakdown strength test, such as the test cost and time consumption associated with the test of the insulation unit. The purpose is to simulate and fabricate the insulation unit in a single unit with the test of the breakdown voltage and breaking strength.

이하 본 발명을 실시하기 위한 시험장치 및 시험방법을 첨부된 도면과 관련하여 상세히 설명하면 다음과 같다.Hereinafter, a test apparatus and a test method for carrying out the present invention will be described in detail with reference to the accompanying drawings.

제1도는 본 발명 시험장치의 종단면 구성도로서 절연기판(2)상에 덮개(3)가 구비된 절연체통(4)이 고정되어지고, 그 내측으론 상단으로 요입홈(5)이 형성된 원통형 절연지지부(6)를 절연기판(2)상에 취부시키되, 절연지지부(6)의 외측으로는 지지부의 외주면과 약간의 간격을 두고 금속접지전극(7)이 하부플랜지(8)에 의해 절연기판(2)상에 고정되도록 하였으며, 금속접지전극(7)의 정중앙으로는 절연체통(4)의 덮개(3)를 관통한 전극봉(9)을 삽설하여 전극장치(1)가 형성되게 한 것이되, 전극봉(9)은 전계집중을 고려하여 이를 회피할 수 있도록 낮은 전계가 형성될 수 있게 한 것으로 도면중 미설명 부호 (10)은 도선, (11)은 실드링, (12)는 절연기체(절연유), (13)은 절연유니트, (14)는 절연유니트 절연부, (15)는 절연유니트 반도전부이다.1 is a longitudinal cross-sectional view of the test apparatus according to the present invention. A cylindrical insulating paper having an insulator tube 4 having a cover 3 fixed thereon on an insulating substrate 2, and having a recessed groove 5 formed at an upper end thereof. The branch 6 is mounted on the insulating substrate 2, but the outer side of the insulating support 6 has the metal grounding electrode 7 formed by the lower flange 8 at a distance from the outer circumferential surface of the supporting portion. 2) to be fixed on the center of the metal ground electrode (7) to insert the electrode rod (9) penetrating through the cover (3) of the insulator barrel (4) to form the electrode device (1), The electrode 9 has a low electric field that can be avoided in consideration of electric field concentration. In the drawing, reference numeral 10 denotes a conductor, 11 a shield ring, and 12 an insulating gas (insulating oil). ) And 13 are insulation units, 14 are insulation unit insulation parts, and 15 are insulation unit semiconducting parts.

위와 같이 구성된 본 발명 전극장치로 시험을 행하기 위한 시험방법(실시예)을 설명하면 다음과 같다.Referring to the test method (example) for performing the test with the present invention electrode device configured as described above are as follows.

[실시예]EXAMPLE

먼저 상기한 전계분포를 모의하여 제작한 전극장치(1)중 절연기판(2)상에 취부되어진 절연지지부(6)상의 요입홈(5)에 절연유니트(13)를 취부하되, 실드링(11)를 절연유니트(13)의 반도전부(15) 단부에 맞도록 설치하고, 다음 실드링(11)과 금속 접지전극(7)을 도선(10)을 이용하여 연결한 후, 절연체통(4)의 덮개(3)를 닫고 전극봉(9)을 관통시켜 전극봉(9)의 단부가 절연지지부(6)의 내면과 거의 맞닿게 한 상태에서 내부를 진공상태로 배기시켜, 절연체통(4) 내부로 절연기체(절연유)(12)를 봉입되게 하고, 전극봉(9)과 금속접지전극(7) 사이에 전압을 인가하여 내전압 및 파괴강도 시험을 행하게 되는 것이다.First, the insulating unit 13 is attached to the recessed groove 5 on the insulating support 6 mounted on the insulating substrate 2 of the electrode device 1 simulated by the electric field distribution. ) Is fitted to the end of the semiconducting portion 15 of the insulating unit 13, and then the shield ring 11 and the metal ground electrode 7 are connected using the conductive wire 10, and then the insulator tube 4 To close the cover 3 and penetrate the electrode rod 9 so that the end of the electrode rod 9 is almost in contact with the inner surface of the insulating support portion 6 to exhaust the interior in a vacuum state into the insulator tube 4. The insulating gas (insulating oil) 12 is sealed, and a voltage is applied between the electrode rod 9 and the metal ground electrode 7 to perform a breakdown voltage and breakdown strength test.

이상과 같은 본 발명은 시험전압으로 초고압을 인가하지 않게 됨과 아울러 전압인가용 단말 및 절연접속부 공사등의 복잡한 공사가 필요없게 되어 시험시간 및 시험비용이 크게 절감되어지는 것이며, 또한 절연유니트 단품만의 특성시험이 가능하게 되어 적은 용량의 시험설비로 내전압 및 파괴강도 시험을 행할 수 있어 경제성 및 작업성이 대폭 향상되어지는 등 본 발명에 의하여 달성되는 효과가 매우 큰 것이다.As described above, the present invention does not apply the ultra high voltage to the test voltage, and also eliminates the complicated construction such as the terminal for the voltage application and the insulation connection, thereby greatly reducing the test time and the test cost, and also for the insulation unit only. It is possible to perform the characteristic test, and with the small capacity test facility, the withstand voltage and breakdown strength test can be performed, and the economic and workability are greatly improved.

Claims (2)

절연기판(2)상에 덮개(3)가 구비된 절연체통(4)이 고정되어지고, 그 내측으론 상단으로 요입홈(5)이 형성된 원통형 절연지지부(6)를 절연기판(2)상에 취부시키되, 절연지지부(6)의 외측으로는 지지부의 외주면과 약간의 간격을 두고 금속접지전극(7)이 하부 플랜지(8)에 의해 절연기판(2)상에 고정되도록 하였으며, 금속접지전극(7)의 정중앙으로는 절연체통(4)의 덮개(3)를 관통한 전극봉(9)를 삽설하여 전극장치(1)를 형성하되, 전극봉은 전계 집중을 고려하여 보다 낮은 전계가 형성될 수 있게 함을 특징으로 하는 케이블 접속부용 절연유니트의 시험장치.An insulator cylinder 4 having a cover 3 is fixed on the insulator substrate 2, and a cylindrical insulation support 6 having a recessed groove 5 is formed on the insulator substrate 2. The metal ground electrode 7 is fixed on the insulating substrate 2 by the lower flange 8 at a distance from the outer circumferential surface of the support portion to the outside of the insulating support 6. In the center of 7), the electrode device 1 is formed by inserting the electrode rod 9 penetrating through the cover 3 of the insulator container 4, and the electrode rod is formed so that a lower electric field can be formed in consideration of the electric field concentration. Apparatus for testing the insulation unit for cable connection, characterized in that. 전계분포를 모의하여 제작한 전극장치(1)중 절연기판(2)상에 취부되어진 절연지지부(6)상의 요입홈(5)에 절연유니트(13)를 취부하되, 실드링(11)을 절연유니트(13)의 반도전부(15)에 단부에 맞도록 설치하고, 도선(10)을 이용하여 상기 실드링(11)과 금속접지전극(7)을 연결한 후, 절연체통(4)의 덮개(3)를 닫고 전극봉(9)을 관통시켜 전극봉(9)의 단부가 절연지지부(6)의 내면과 거의 맞닿게 한 상태에서 내부를 진공상태로 배기시켜, 절연체통(4) 내부로 절연기체(절연유)(12)를 봉입되게 하고, 전극봉과 금속접지전극 사이에 전압을 인가하여 내전압 및 파괴강도 시험을 행하게 됨을 특징으로 하는 케이블 접속부용 절연유니트의 시험방법.An insulating unit 13 is mounted in the recess 5 of the insulating support 6 mounted on the insulating substrate 2 of the electrode device 1 which simulates the electric field distribution, and insulates the shield ring 11. The semi-conductive part 15 of the unit 13 is fitted to the end, and the shield ring 11 and the metal ground electrode 7 are connected using the conductive wire 10, and then the cover of the insulator container 4 is attached. (3) is closed and the electrode 9 is penetrated so that the inside of the electrode 9 is almost in contact with the inner surface of the insulating support 6, and the inside is evacuated in a vacuum state to insulate the gas into the insulator cylinder 4. (Insulating oil) A test method for an insulation unit for cable connection, characterized in that the dielectric member and the breakdown strength test are performed by applying a voltage between the electrode rod and the metal ground electrode.
KR1019890007418A 1989-05-31 1989-05-31 Cable connecting insulated unit detecting system and method KR910007692B1 (en)

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