Search results with tag "Selective coordination"
Fault Current Calculations and NEC Requirements
www.cce.umn.edu• Do short-circuit current study and coordination study • Use time current curves to identify types and options of CBs required to achieve selective coordination (select breaker needed eliminate overlap of curves for fault current available) • Even small changes in fault current can result in lack of compliance Short-Circuit Current Study By
Fuse의 원리 및 선정 방법 - 도일코리아
www.dokor.comSelective Coordination (CB로 회로보호) Fuse 선정 MCCB 90A & 400A로 보호 •MCCB의 기계적인 구조로 인해 접점걸쇠 풀림에서 차단까지 긴 시간이 소요. •하위 차단기가 고장전류를 차단하기 전에 전단의 차단기가 OPEN 가능성 •단락의 경우에 부적합한 조합
Understanding Time Current Curves - Maverick Technologies
www.mavtechglobal.comThe curves allow the power system engineer to graphically represent the selective coordination of overcurrent devices in an electrical system. Modern power system design software packages such as EasyPower, SKM Power Tools, and Etap contain graphical libraries of curves to allow the power system engineer the ability to plot, analyze and print
FUSEOLOGY - Littelfuse Fuse
www.littelfuse.comis pulse cycle withstand capability and the second is selective coordination. 2. Pulse Cycle Withstand Capability Electrical pulses produce thermal cycling and possible mechanical fatigue that could affect the life of the fuse. For this reason, it is important to know the pulse cycle withstand capability of the fuse, which is defined as the ...
Selective Coordination - Cooper Industries
www.cooperindustries.com©2005 Cooper Bussmann 93 Example — Fuse Selective Coordination Review the one-line diagram of the fusible system. All the fuses are Low-Peak Fuses.
Selective Coordination - Cooper Industries
www.cooperindustries.com96 ©2005 Cooper Bussmann Simple Method To Check Circuit Breaker Coordination The previous discussion and curve illustrated two molded case circuit breakers (90A and 400A) with the unlatching characteristics for both shown on one
Selective Coordination - Cooper Industries
www.cooperindustries.com96 ©2005 Cooper Bussmann Simple Method To Check Circuit Breaker Coordination The previous discussion and curve illustrated two molded case circuit breakers (90A and 400A) with the unlatching characteristics for both shown on one
Selective Coordination - Cooper Industries
www.cooperindustries.com90 ©2005 Cooper Bussmann Fuse Curves The figure to the right illustrates the time-current characteristic curves for two sizes of time-delay, dual-element fuses in series, as depicted in the one-line