现代建筑电气
現代建築電氣
현대건축전기
MODER ARCHITECTURE ELECTRIC
2015年
5期
38-40
,共3页
余昌松%殷春生%裘文君%王华卿
餘昌鬆%慇春生%裘文君%王華卿
여창송%은춘생%구문군%왕화경
互电阻%接地电阻%直线法%等腰三角形法
互電阻%接地電阻%直線法%等腰三角形法
호전조%접지전조%직선법%등요삼각형법
mutual resistance%ground resistance%straight-line method%isosceles triangular method
根据电磁学原理和互电阻理论,建立电压降法测量防雷接地电阻时三个电极位置关系的数学公式。分析认为三个电极相对位置的不确定性是接地电阻测量中产生误差的主要原因,电极的位置关系满足特定的公式是消除测量误差的必要条件。分析了接地电阻的两种测量方法,建议采用直线法对防雷装置接地电阻进行检测,以满足检测结果的精度要求。
根據電磁學原理和互電阻理論,建立電壓降法測量防雷接地電阻時三箇電極位置關繫的數學公式。分析認為三箇電極相對位置的不確定性是接地電阻測量中產生誤差的主要原因,電極的位置關繫滿足特定的公式是消除測量誤差的必要條件。分析瞭接地電阻的兩種測量方法,建議採用直線法對防雷裝置接地電阻進行檢測,以滿足檢測結果的精度要求。
근거전자학원리화호전조이론,건립전압강법측량방뢰접지전조시삼개전겁위치관계적수학공식。분석인위삼개전겁상대위치적불학정성시접지전조측량중산생오차적주요원인,전겁적위치관계만족특정적공식시소제측량오차적필요조건。분석료접지전조적량충측량방법,건의채용직선법대방뢰장치접지전조진행검측,이만족검측결과적정도요구。
According to the principles of electromagnetism and mutual resistance theory,a mathematical formula of three-electrodes positional relationship were built when the voltage drop method was used to measure the grounding resistors of lightning protection.The analysis results show that the relative position uncertainty of the three electrodes is the main reason of the measurement error,and the positional relationship which meets specific formula the between the electrodes is a necessary condition to eliminate measurement errors.The two measurement methods of ground resistance were analyzed.It is suggested that the straight-line method is used to measure the ground resistance of lightning protection device ,which meets the accuracy of detection results.