某新型塑殼斷路器擴容可行性分析及驗證 

張威 
北京正北元電器有限公司，北京 101105 
 

摘 要：分析了某新型塑殼斷路器由250A殼架擴容到320A殼架的可行性，并根據分析結果對額定電流發熱、電壽命以及短路分斷能力進行試驗驗證。試驗數據表明，擴容后斷路器必須保證熱脫扣時間且轉子、罩殼等關鍵零件要改用耐熱能力更好的材料。 

關鍵詞：塑殼斷路器；擴容；電壽命

中圖分類號：TM561 文獻標識碼：B 文章編號：1007-3175(2013)04-0046-03

Capacity Expansion Feasibility Analysis and Verification of Certain New Type of Molded Case Circuit Breaker 

ZHANG Wei 
Beijing Zhengbeiyuan Electrical Appliance Co., Ltd, Beijing 101105, China 
 

Abstract: Analysis was made to the feasibility of certain new type of molded case circuit breaker with case frame expanded from 250 A to 320 A. According to the analysis result, test and verification was carried out for rated current heating, electrical life and short circuit breaking capacity. Test data shows that after capacity expansion, the circuit breaker has to ensure the thermal tripping time, at the same time the rotor, case cover etc key parts have to use better heat-resisting materials.
Key words: molded case circuit breaker; capacity expansion; electrical life