A New Approach to Low-Voltage Circuit Breaker Short-Circuit Selective Coordination

被引：0

作者：

Larsen, Ed ^{[1
]}

机构：

[1] Sq D Schneider Elect, Cedar Rapids, IA 52404 USA

来源：

CONFERENCE RECORD 2008 IEEE INDUSTRIAL & COMMERCIAL POWER SYSTEMS TECHNICAL CONFERENCE | 2008年

关键词：

Circuit breakers; coordination; discrimination; fault currents; overcurrent protection; selective coordination; selectivity;

D O I：

暂无

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

The expanded requirements in the 2005 NFC for selective coordination have prompted many engineers to question if selective coordination can be achieved with low-voltage circuit breakers. This is a valid question as the time-current curves of low-voltage circuit breakers often suggest that coordination can only be achieved in the overload and low level fault current zones. Therefore, how time-current curves are developed and their limitations are discussed. A new way for system designers to evaluate the level of selective coordination between low-voltage circuit breakers is introduced, indicating that higher levels of coordination can be achieved than those shown by the use of time-current curves alone.

引用

页码：130 / 136

页数：7