微型斷路器滅弧系統(tǒng)對短路分斷能力影響的研究
董愛麗
(北京北元電器有限公司,北京 101105)
摘 要:短路分斷能力是微型斷路器 (MCB) 的一項重要的技術(shù)指標(biāo),影響該指標(biāo)的因素很多。通過對分斷試驗樣機燒蝕的情況——動觸頭引弧板頂部電弧停滯時間長、燒蝕嚴重及滅弧柵片未被有效利用進行分析,結(jié)合理論提出優(yōu)化方案并進行試驗驗證,得出優(yōu)化引弧板設(shè)計、滅弧室設(shè)計以及出氣口結(jié)構(gòu)有利于縮短電弧停滯時間,加快電弧的引弧速度,提高柵片切弧利用率,以增加電弧電壓,進而提高 MCB 的分斷性能。
關(guān)鍵詞: 微型斷路器;短路分斷能力;引弧板;滅弧系統(tǒng)
中圖分類號:TM561 文獻標(biāo)識碼:A 文章編號:1007-3175(2024)01-0050-05
Research on Effects of MCB Arcing Systems on the
Short-Circuit Breaking Capacity
DONG Ai-li
(Beijing Beiyuan Electric Appliance Co., Ltd, Beijing 101105, China)
Abstract: The short-circuit breaking capacity is an important technical index of Miniature Circuit Breakers(MCB), and there are many factors affecting this capacity. According to the analysis of the breaking experimental prototype burning, the arc plate top of movable contacts has long-time arc stagnation and serious ablation, and the arc extinguishing grid is not utilized efficiently, so this paper puts forward an optimization scheme based on some theories and makes the correspondent experimental verification. The optimized designs of arc plates, arc extinguishing chambers and air outlets are beneficial to shorten the arc stagnation time, increase the arc striking speed, improve the utilization rate of grid cutting arc to increase the arc voltage, thus improving the short-circuit breaking capacity of MCB.
Key words: miniature circuit breaker; short-circuit breaking capacity; arc plate; arc extinguishing system
參考文獻
[1] 楊宇,司鶯歌,尹冬梅. 小型斷路器滅弧結(jié)構(gòu)對短路分斷能力的影響[J] . 電器與能效管理技術(shù),2019(14) :82-85.
[2] 尹天文. 低壓電器技術(shù)手冊[M]. 北京:機械工業(yè)出版社,2014.
[3] 周榮偉,葛偉駿,徐迪安. 小型斷路器分斷電弧運動仿真分析[J] . 電器與能效管理技術(shù),2015(2) :38-41.
[4] 陳德桂. 低壓斷路器的開關(guān)電弧與限流技術(shù)[M]. 北京:機械工業(yè)出版社,2007.
[5] 葛偉駿,徐迪安,周榮偉. 小型斷路器滅弧區(qū)域氣流場的分析與研究[J]. 電器與能效管理技術(shù),2016(8):42-45.
[6] 熊德智,陳向群,楊杰,等. 微型斷路器滅弧失效分析及性能優(yōu)化設(shè)計[J].電工技術(shù)學(xué)報,2019,34(11) :2333-2341.