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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时间继电器的接线方法

2013/11/14 10:12:46点击:
时间继电器的主要功能是作为简单程序控制中的一种执行器件,当它接受了启动信号后开始计时,计时结束后它的工作触头进行开或合的动作,从而推动后续的电路工作。

  那么它是如何接线的呢?又有哪些方式呢?

  时间继电器的接线方法:

  第一、控制接线:你把它看成直流继电器来考虑。3、7用来接12V控制电压;2、7用来接24V控制电压。其中的7当成直流电的负极,使用时接到零线。2接220V的火线。

  第二、工作控制:虽然控制电压接上了,但是是否起控制作用,由面板上的计时器决定。

  第三、功能理解:它就是一个开关,单刀双掷的,有一个活动点活动臂,就像常见的闸刀开关的活动刀臂一样。8是活动点,5是常闭点,继电器不动时,他们两个相连。动作时,8、6相连。

  第四:负载接线:电源的零线或负极接用电器的零线或负极端。电源的火线或正极接8脚,用电器的火线端或正极接6脚,5脚空闲不用。

  第五、工作原理:计时无效期间,8、5相连,相当于我们平常电灯开关断开状态。有效时,继电器动作,8、6相连,用电器得电工作,相当于我们平常电灯开关接通状态。

  时间继电器的电气控制系统中是一个非常重要的元器件。一般分为通电延时和断电延时两种类型。