摘要
通过对低压配电线路过载保护的公式的含义进行解读,指出出现持续的过电流而又小于可靠动作电流的情况下,过载电流公式不能提供完全的过载保护,不适用于电子式脱扣器的断路器。提出了电子式脱扣器和热脱扣器的断路器作为过载保护电器时能够提供完全过载保护的基本公式。
This paper explained the meaning of the overload protection formulas for low voltage distribution lines,and points out the cases that formulas may not ensure overload protection when sustained overload current is less than I2,are not suitable to the circuit breaker with electronic tripping device. Formulas for the circuit breaker with electronic tripping device or with thermal overload release are given,overload protection according with those formulas is ensured.
出处
《现代建筑电气》
2015年第7期34-37,42,共5页
Modern Architecture Electric
关键词
低压配电线路
低压断路器
过载保护
热脱扣器
电子式脱扣器
low voltage distribution circuit
low voltage circuit breaker
overload protection
thermal overload release
electronic tripping device
