• 전기학회논문지
• /
• 제60권6호
• /
• pp.1239-1244
• /
• 2011

In our previous paper, we developed an insulator inspection robot system for a suspension insulator string in the 345kV power transmission line. However, this robot cannot be applied to a tension insulator string, because its constituent insulators are different in diameter and height from those of a suspension insulator string. To solve this problem, we developed a new live-line insulator inspection robot system that is applicable to both suspension and tension insulator strings. We confirmed its effectiveness through live-line performance tests.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2007년도 춘계학술대회 논문집
• /
• pp.864-874
• /
• 2007

Suspension insulator in Catenary Trolley Wire Systems must have two characteristics, electric insulation and mechanical endurance. Because suspension insulator is used in supporting and insulating position between power supply parts and earth conducted supporting parts. The insulator's electric characteristics can be influenced by surface pollution and damage from the environment such as humidity, dust, smoke, salt. etc. And, the insulating parts can be electrically short. These electrically damaged insulator can cause serious accidents that have far-reaching effect. So appropriate management basis of suspension insulator is needed. And we present appropriate cleaning and the changing period of suspension insulator on the basis of actual data.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 1996년도 하계학술대회 논문집 C
• /
• pp.1791-1793
• /
• 1996

This paper describes Thermal-Mechanical performance and Ultimate Mechanical-Strength test for the purpose of aging analysis of suspension insulator. The temperature difference of insulator surface according to the aging of suspension insulator brought out about $2^{\circ}C$ to $7-8^{\circ}C$ difference comparing with the atmospheric temperature. Quality standard and Mechanical-Strength of used suspension insulator deteriorate more remarkably than that of new suspension insulator. It is required that Thermal-Mechanical performance test standard be revised in the future. And it is described about the development prospect of polymer insulators

• 한국조명전기설비학회지:조명전기설비
• /
• 제10권4호
• /
• pp.85-92
• /
• 1996

본 논문에서는 현수애자의 경년변화 분석을 위해 과전파괴 시험과 장기강도 기계적 하중시험을 신품과 사용품에 대하여 비교, 시험하였다. 현수애자의 경년변화에 따라 애자표면 온도가 대기보다 약 2[$^{\circ}C$] 상승에서 약 7~8[$^{\circ}C$] 상승이 발생하였고, 접착제로 사용한 포틀랜드 시멘트의 오토크래브 팽창율도 경년변화 사고가 많은 시료(오토크래브 팽창율의 측정치 :0.37[%]) 가 사고가 적은 시료(오토크래브 팽창율 : 0.1[%])보다 높게 나타났다. 또한, 신품보다 사용품의 품질관리지수 Qs와 인장강도가 현저히 저하됨을 알 수 있어, 우리나라의 기후조건에 맞도록 경년변화 시험 기준 개정도 요구된다.

• 대한전기학회논문지:전기물성ㆍ응용부문C
• /
• 제51권2호
• /
• pp.80-84
• /
• 2002

This paper presents some of the results of current research on 400kN Suspension Insulator Design. In this paper, authors carried out 2-dimensional field calculation in order to analyse dielectric characteristics of the insulator unit and 3-dimensional field calculation in order to analyse dielectric characteristics of the insulator strings. And the results of puncture tests of insulators were compared with the required field intensity of the insulator As results, it was found that electric field on the insulator unit is severest between two triple junctions, dielectric characteristics of insulator strings are much influenced by the surrounding configuration and the manufactured insulators have good results of puncture tests.

• 한국정밀공학회지
• /
• 제24권11호
• /
• pp.66-75
• /
• 2007

To prevent an insulator failure, an automatic cleaning and inspection robot was developed for suspension insulator strings. The robot autonomously moves along the insulator string using the clamps installed on its two moving frames. Especially, unlike the existing cleaning robots using jets of water, the robot system adopts a dry cleaning method using rotating brushes and a circular motion guide. In addition, a mechanized brush bristles and a voltage-balancing contactor are devised to increase cleaning efficiency and to prevent arc generation under live-line conditions, respectively. We confirmed its effectiveness through experiments.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2001년도 추계학술대회 논문집 전기물성,응용부문
• /
• pp.149-151
• /
• 2001

This paper presents the results of characteristics of the solid-core and suspension insulators for the reliability estimation. The various analytic techniques. such as ICP, XRD, SEM, EDS, were applied for the purpose. The alumina content of solid-core insulator was less than that of suspension insulator The cristobolite was crystallized only in solid-core insulator. The average pore size of solid-core insulator was larger than that of suspension insulator. However, the numbers of pore were fewer in the solid-core insulator.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 1999년도 하계학술대회 논문집 E
• /
• pp.2047-2050
• /
• 1999

This paper presents some of the results of current research on 300 kN Suspension Insulator Design. In this paper, authors first used 2-dimensional field calculation to solve the electric field distribution of an insulator unit and insulator strings, and then 3-dimensional field calculation in order to overcome the shortcomings of 2-dimensional field calculation in which an axis-symmetrical coordinate has been used. And, it was found that the environmental configuration of 300 kN Suspension Insulator String gives great roles to the field distribution of the insulators.

• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 2006년도 추계학술대회 논문집
• /
• pp.9-10
• /
• 2006

• KIEE International Transactions on Electrophysics and Applications
• /
• 제3C권5호
• /
• pp.165-170
• /
• 2003

This paper presents development of solid core suspension disc insulators (cap and cap suspension disc insulator) for replacing cap and pin suspension disc insulators in overhead transmission and distribution lines which expose to lightning discharges. By this means the punctured problem caused by steep front surge voltage created by lightning discharge on the lines can be solved. The solid core suspension insulator was designed and constructed based on the dimensions of conventional suspension disc insulators (cap and pin insulators). The insulators are made of alumina porcelain. The electrical and mechanical characteristics of the solid core suspension insulators were carried out. The puncture test was performed in the air by applying steep front impulse voltage with amplitude about 2.5 per unit of 50% flashover (CFO) of the insulator unit at negative standard lightning impulse $1.2/50\;\mu\textrm{s}$ with steepness up to $9200\;kV/\mu\textrm{s}$. The testing results show that solid core suspension disc insulators are not punctured eventhough the steepness of the steep front impulse voltage was increased up to $9200\;kV/\mu\textrm{s}$.