小型断路器过载保护可靠性的快速试验方法研究
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摘要
对小型断路器在不同过载电流倍数下的动作时间进行研究,建立过载试验电流倍数与动作时间的关系模型。分段处理不同过载倍数下动作特性,并应用回归分析方法识别模型参数,得到不同过载倍数下动作特性。根据小型断路器在不同过载倍数下动作时间之间的关系,提出采用高过载倍数下过载试验替代标准过载特性试验的等效试验方法,有效降低了小型断路器的可靠性试验时间。试验结果表明,不同过载倍数下小型断路器的动作时间之间具有较强的相关性,高过载倍数下过载试验可以替代标准过载特性试验。
The action time of miniature circuit breaker was studied under different overload current multiples,and the relational model between current multiples of overload test and the action time was established. Operation characteristic under different overload multiples was obtained by periods processing and using the regression analysis method to identify the parameters of the model. According to the relationship between the action time under different overload multiples of the miniature circuit breaker,the equivalent test method under overload test with high overload multiple was proposed to substitute the standard overload characteristic test,which effectively reduces the reliability test time of miniature circuit breaker. The test result shows that there is a strong correlation between the action time of miniature circuit breaker under different overload multiples,and the standard overload characteristic test can be substituted by the overload test under high overload multiple.
The action time of miniature circuit breaker was studied under different overload current multiples,and the relational model between current multiples of overload test and the action time was established. Operation characteristic under different overload multiples was obtained by periods processing and using the regression analysis method to identify the parameters of the model. According to the relationship between the action time under different overload multiples of the miniature circuit breaker,the equivalent test method under overload test with high overload multiple was proposed to substitute the standard overload characteristic test,which effectively reduces the reliability test time of miniature circuit breaker. The test result shows that there is a strong correlation between the action time of miniature circuit breaker under different overload multiples,and the standard overload characteristic test can be substituted by the overload test under high overload multiple.
引文
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[2]何瑞华.我国低压电器新产品主要特征、发展思路及关键技术[J].电力设备,2008(2):1-5.
[3]LU J G,DU T H,LUO Y Y.Study on theinstantaneous reliability of low voltage circuit breakers[J].Journal of Zhejiang University SCIENCE A,2007,8(3):370-377.
[4]THURIES E,EBERSOHL G,DUPRAZ J P,et al.Improvement of high voltage switchgear reliability[C]∥The 4th International Conference on Trends in Distribution Switchgear,London,UK:IEE Conference Publication,1994,400:145-149.
[5]张兰晶.小型断路器发展与研究的探讨[J].低压电器,2013(12):1-4,24.
[6]骆燕燕,陆俭国,李志刚.小型断路器可靠性试验及抽样方案的研究[J].机床电器,2000(3):8-10.
[7]LI K,LU J G,WU Y,et al.Research on overload protection reliability of moulded case circuit-breakers and its test device[J].Journal of Zhejiang University Science A,2007,8(3):453-458.
[8]姚芳,姚倩云,李啸.小型断路器热双金属片对过载保护特性影响的研究[C]∥第五届电工产品可靠性与电接触国际会议,2014:283-287.
[9]邵东阳.热双金属元件在小型断路器中的应用分析[J].江苏电器,2005(2):17-18.
[10]许志红.电器理论基础[M].北京:机械工业出版社,2014.
[11]徐晖.对塑壳断路器热脱扣器特性整定试验若干问题的分析[J].低压电器,1992(4):11-14.
[12]迟长春.过载保护数学模型及其算法的研究[D].天津:河北工业大学,2008.
[13]汪奇生.线性回归模型的总体最小二乘平差算法及其应用研究[D].云南:昆明理工大学,2014.
[14]设备可靠性试验总要求:GB 5080:1—1986[S].
[15]家用和类似用途的过电流保护断路器的可靠性试验方法:GB/Z 22203—2008[S].北京:中国国家标准化管理委员会,2008.