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
你的位置:首页 > 新闻动态 > 公司新闻

人民电气说一说断路器合闸电阻的作用

2020/12/8 15:55:52      点击:

断路器合闸电阻的作用

电力系统中的投、切空载线路,会产生操作过电压。为此,要在断路器上装设合闸电阻,释放电网的能量,从而保护电网电气设备。

合闸电阻在主断口(灭弧室)合闸前的几个毫秒投入,在主断口合上若干毫秒后自动切除。

合闸电阻作用是断路器在断开时在主触头合上前先退出,在合闸时合闸电阻先投入,当主触头合上时被短接退出,这样做可以防止操作过电压。