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
新闻动态 News
搜索 Search
你的位置:首页 > 新闻动态 > 行业新闻

频率继电器特点

2013/12/18 13:32:46点击:

频率继电器(frequency relay )是以电压或电流为输入量(激励量)并对输入量的频率做出相应动作的一种继电器。 频率继电器通过检测电源频率而进行控制的量度继电器,利用频率继电器的特点,对传统时间原则控制的绕线电机转子电阻切换进行革命的改变,改为速度原则切换,使切换准确可靠,减少电动机冲击,延长电动机及机械寿命。

频率继电器特点
  •   1. 频率继电器为数字式频率显示及异常检测器

      2.可设置手工或自动复归,自动复归 延迟时间为可设置为1秒至10秒。

      3.频率过高及过低延迟时间可设置为 1秒至10秒。

      4.可设置频率过高不检测或频率过低 不检测。

      5.可作频率过高检测50~99Hz及频率过 低检测10~60Hz。

      6. 使用石英震荡器 + 数字IC组成,可进行高精度频率检测,检测精度在 0.1Hz以内。

               频率继电器特点