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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ZW8-12型户外高压真空断路器

2014-9-17 9:54:09点击:
ZW8-12型户外高压真空断路器概述
  ZW8-12型户外高压真空断路器(以下简称断路器),是三相交流50Hz、12KV的户外高压配电设备,用于开断、关合电力系统中的负荷电流、过载电流和短路电流,更适用于频繁操作的场所。
  断路器配用CT23弹簧操动机构,可实现电动储能、电动分合闸,也可手动储能和“四遥”监控。   断路器是城乡电网无油化改选的最佳设备。 2.正常使用条件 a)
海拔:不超过1000m; b) 周围空气温度:上限+40oC,下限-40oC; c) 风压不超过700Pa(相当于风速34m/s); d)
空气污移程度(等级),不大于Ⅲ级; e) 超出以上条件的要求,由用户同制造单位协定。 3 主要技术参数 3.1 断路器技术参数序号 参数名称 单位 数 据
12.5KA 16KA 20KA 1   额定电压 kV 12 2   额定绝缘水平 1min工频耐压 干试 相间、对地42,断口48 湿试 对地外绝缘34
雷电冲击耐压(峰值) 相间、对地75,断口85 3   额定频率 Hz 50 4   额定电流 A 630 5   额定短路开断电流 kA 12.5 16 20
6   额定短路关合电流(峰值) 31.5 40 50 7   额定峰值耐受电流 31.5 40 50 8   4S额定短时耐受电流 12.5 16 20 9
  额定操作顺序 分-0.3s-合分-180s-合分 10   合闸时间/分闸时间 ms 25~50/15~50 11   额定短路开断电流开断次数 次 30
12   机械寿命 10000 13   控制回路及辅助回路1min工频耐压 V 2000 14   额定操作电压及辅助回路额定电压 DC220;AC220
15   过电流脱扣器 额定电流 A 5 脱扣电流准确度 % ±10 3.2 隔离开关技术参数序 号 参 数 名 称 单 位 数 据 1   触头开距 mm
11±1 2   触头接触行程 2+1/-0.3 3   相间中心距离 260±1.5 4   平均合闸速度 m/s 0.6±0.2 5   平均分闸速度
1.2±0.3 6   触头合闸弹跳时间 ms ≤2 7   三相分合闸同期性 ≤2 8   每相回路电阻 μΩ ≤120