摘要
Ｔ Ｔ 系统和 Ｔ Ｎ－ Ｃ 系统是低压保护接线的两种常见形式，对其应用于低压电动机的保护特性进行了比较，并结合保护元件 Ｎ Ｔ， Ｒ Ｔ Ｏ 熔断器和断路器的安秒特性，进一步阐明几种保护元件在低压系统典型接线中的保护特点．对于普通的电动机保护可采用 Ｈ Ｔ 熔断器，对重要的电动机进行保护时， Ｔ Ｔ 系统应选择带零序保护的断路器， Ｔ Ｎ－ Ｃ
TT and TN-C system are typical of wiring of low voltage protection.This paper presents the idea to apply the two systems in low voltage electric motor protection,and compares two styles to show their advantages and shortcomings.Based on the wiring connections, with the “Ampere Second” characteristic of the protection component HT、RTO fusion and circuit breaker,further anaylyze the protection characteritics of the several protection component in typical low voltage wiring.NT fusion is fit for the ordinary electric motor protection;when the TT system is used for the protection of important electric motor,the circuit breakr with zero-sequence protection should be selected.But for the TN-C system,circuit breaker is enough .
出处
《郑州工业大学学报》
1999年第3期98-100,共3页
Journal of Zhengzhou University of Technology
基金
橡塑模具国家工程研究中心建设项目
关键词
低压
电动机
保护接地
断路器
熔断器
短路保护
low voltage motor
protection wiring
circuit breaker
fuse
short circuit protection
