某新型塑壳断路器扩容可行性分析及验证
张威
北京正北元电器有限公司,北京 101105
摘 要:分析了某新型塑壳断路器由250A壳架扩容到320A壳架的可行性,并根据分析结果对额定电流发热、电寿命以及短路分断能力进行试验验证。试验数据表明,扩容后断路器必须保证热脱扣时间且转子、罩壳等关键零件要改用耐热能力更好的材料。
关键词:塑壳断路器;扩容;电寿命
中图分类号:TM561 文献标识码:B 文章编号: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