Mike Krzyzewski is really a famous coach of Dream Team. She has coached north america men's basketball team for some time, that's clinched numerous medals for his country. Following Londonfl jerseys supplyn Olympic was over, Krzyzewski told The Associated Press that this game will be his final one as national coach, a job he's held for seven years. He had left open the possibility of swomen nfl jerseystaying with the team beyond the London Games, when practice on Saturday said these will be his last Olympics.When asked if he was sure, Krzyzewski didn't hesitate before again saying, "yecheap nfl jerseys wholesales," this will be his last game "If we could win it, then it might be three major championships in a row, i always do not know when that has been done because we haven't usually won http://govoriotkrito.bg/libs/nflcn08.htmthe globe championships," Krzyzewski said. "It becomes an enormous thing for the program." Whatever, he's an awesome coach. His achievement are going to be remembered by the country.cheap nfl jerseys
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电压回路断相闭锁继电器的原理分析与应用

2013/12/18 14:14:52点击:

DB-1型、LB-1A型断相闭锁断电器的原理,指出了它们在工程的实际应用,及应注意的问题。

闭锁继电器电力系统中电压互感器是一个内阻极小的电压源,正常运行时负载阻抗很大,相当于开路状态,二次仅有很小负载电流。当二次短路时,负载阻抗为零,产生很大的电流,会将PT烧坏。闭锁继电器因此通常在电压互感器二次回路加装熔断器或快速自动开关,当二次短路时,熔断器熔断或自动开关脱扣器