低压进线断路器保护定值整定方法的研究与应用  

Research and application of adjust method for protection setting of low-voltage incoming circuit breaker

作　　者：李海存 LI Haicun(Yunnan Tian’an Chemical Co., Ltd., Anning, Yunnan, 650309, China)

机构地区：[1]云南天安化工有限公司,云南安宁650309

出　　处：《硫酸工业》2023年第1期62-66,共5页Sulphuric Acid Industry

摘　　要：主要论述了配电变压器低压侧0.4 kV进线断路器的保护定值整定方法和应用。基于三段式保护设定方法,论证了取消速断保护的必要性,详解给出了选择性速断保护和过载保护的整定计算原则。通过实例计算和实际应用验证了0.4 kV进线断路器的保护定值整定方法的正确性。The protection setting method and application of 0.4 kV incoming circuit breaker at the low voltage side of distribution transformer are mainly discussed.Based on the three-section protection setting method,the necessity of canceling quick-break protection is demonstrated,and the setting calculation principles of selective quick-break protection and overload protection are given in detail.The correctness of the protection setting method of 0.4 kV incoming circuit breaker is verified by case calculation and practical application.

关 键 词：瞬时短路保护 选择性短路保护 过载保护 短路电流 

分 类 号：TQ111.16[化学工程—无机化工]