| 引用本文: | 戴 超,庄劲武,杨 锋,陈 搏,王 晨,江壮贤.大电流电弧触发式混合限流熔断器分析与设计[J].电力自动化设备,2011,31(10): |
| DAI Chao,ZHUANG Jinwu,YANG Feng,CHEN Bo,WANG Chen,JIANG Zhuangxian.Analysis and design of high-current arc-triggering hybrid current-limiting fuse[J].Electric Power Automation Equipment,2011,31(10): |
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| 摘要: |
| 为解决电弧触发式混合限流熔断器在大电流场合下的应用问题，针对其关键技术开展了深入研究，重点对电弧触发器进行了优化设计。通过建立电弧触发器的热电耦合模型，分析了熔体结构尺寸对其温升和弧前特性的影响，旨在提高其熔体的载流密度，在满足温升要求的前提下缩短其熔断时间，提高故障检测速度。研制了2000 A／640 V工程样机，额定通流功耗144 W。在预期电流峰值100 kA、时间常数4.17 ms的短路试验中，电弧触发器在短路后700 μs熔断起弧，整机弧前时间1.1 ms，全分断时间仅为1.85 ms，短路电流峰值19kA，弧前焦尔积分值仅为同规格快速熔断器的1／28。 |
| 关键词: 大电流 混合限流熔断器 电弧触发 热电耦合模型 耦合 模型 熔断器 设计 |
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| 基金项目:国家自然科学基金资助项目（50877078） |
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| Analysis and design of high-current arc-triggering hybrid current-limiting fuse |
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DAI Chao, ZHUANG Jinwu, YANG Feng, CHEN Bo, WANG Chen, JIANG Zhuangxian
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Naval University of Engineering，Wuhan 430033，China
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| Abstract: |
| For the high-current applications of arc-triggering hybrid current-limiting fuse，the key technologies are deeply studied and the design of arc-trigger is optimized. To shorten its fusing time with allowed temperature rise，the effect of physical dimension of fuse on the temperature rise and pre-arcing characteristics is analyzed with its thermoelectric coupling model. A 2000A／640V prototype is developed and its rated power is 144W. The results of short-circuit test with prospective peak current 100kA and time constant 4.17ms show that，the arc trigger burns out in 700μs after short-circuit fault，the pre-arcing time is 1.1ms，the clear time is 1.85ms，the fault current is limited to 19kA，and the melting joule integral is only 1／28 of the rapid fuse with same specifications. |
| Key words: high current hybrid current-limiting fuse arc-triggering thermoelectric coupling model couplings models electric fuses design |
