基于關(guān)鍵試驗(yàn)的斷路器質(zhì)量改進(jìn)方法研究
叢林1,范學(xué)銘2,信天1,趙毅1
(1 山東省產(chǎn)品質(zhì)量檢驗(yàn)研究院,山東 濟(jì)南 250102;2 中國質(zhì)量認(rèn)證中心,北京 100070)
摘 要:塑料外殼式斷路器(MCCB)廣泛應(yīng)用于輸配電和供電用電系統(tǒng)中,起保護(hù)作用。在GB/T 14048.2—2008國家標(biāo)準(zhǔn)中,規(guī)定了斷路器的基本要求和試驗(yàn)方法,介紹了MCCB的脫扣極限和特性及額定極限短路分?jǐn)嗄芰蓚€(gè)關(guān)鍵試驗(yàn),結(jié)合產(chǎn)品質(zhì)量監(jiān)督抽查檢驗(yàn)結(jié)果,對(duì)斷路器質(zhì)量問題進(jìn)行了分析,繪制了用于質(zhì)量改進(jìn)方法研究的排列圖,為進(jìn)行斷路器質(zhì)量改進(jìn)和性能優(yōu)化及其可靠性研究提供了理論依據(jù),實(shí)例驗(yàn)證表明,該方法是有效可行的。
關(guān)鍵詞:斷路器;脫扣極限和特性;額定極限短路分?jǐn)嗄芰?;質(zhì)量改進(jìn);排列圖
中圖分類號(hào):TM561 文獻(xiàn)標(biāo)識(shí)碼:A 文章編號(hào):1007-3175(2019)11-0049-04
Research on Circuit Breaker Quality Improvement Method Based on Critical Test
CONG Lin1, FAN Xue-ming2, XIN Tian1, ZHAO Yi1
(1 Shandong Institute of Inspection on Product Quality, Jinan 250102, China;2 China Quality Certification Center, Beijing 100070, China)
Abstract: MCCB is widely used in power transmission and distribution of electricity and power supply system. It is the main component of circuit protection. GB/T 14048.2-2008 provides the basic requirements and test methods for circuit breaker. This paper focused on two key tests of tripping limit and characteristics, rated limit and short-circuit breaking capacity of MCCB. The quality problems were analyzed according to the inspection results of product quality supervision and spot check. A pareto diagram for the study of quality improvement method was presented, which provides a theoretical basis for the quality improvement, performance optimization and reliability study of the circuit breaker. An example shows that this method is effective and feasible.
Key words: circuit breaker; trip limit and characteristic; rated ultimate short-circuit breaking capacity; quality improvement; pareto diagram
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