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安科瑞 须静燕
国际电工委员会(iec)对各接地方式供电系统的规定规定:(低压:交流1000V以下)
低压配电接地、接零系统分为IT、TT、TN三种基本形式。TN分为TN-C,TN-S,TN-C-S三种派生形式。
第一个字母表示电源中性点与地的状态: T—表示电源中性线工作直接接地; I —表示电源中性线不接地或采用高阻抗接地。
第二个字母表示负载侧与地的状态: T —电气装置外漏可导电部分直接接地,且接地点独立于电源端接地点; N
—电气装置的外露可导电部分与电源端接地点有直接电气连接
第三个字母C-表示中性线(N线)与保护零线(PE线)共用; 第四个字母S-表示中性线(N线)与PE线分开
IT系统 定义:电源不接地,设备外壳接地 保护:监测系统对地绝缘电阻
整柜:
一体式隔离电源柜 内置设备清单: 医用隔离电源系统 UPS不间断电源 谐波保护器 多功能表 触摸屏监控系统 选配: 双电源切换装置 蓄电池在线监测系统
医疗4件套
医疗IT5件套:
主要设备: 1)
AITR系列医用隔离变压器;2)AIM-M300医疗智能绝缘监测仪;3)AKH-0.66P26电流互感器;4)AID150外接报警与显示仪;5)HDR-60-24仪用电源。
医疗IT6件套:
)
AITR系列医用隔离变压器;2)AIM-M300/SG医疗智能绝缘监测仪;3)AKH-0.66P26电流互感器;4)AID150外接报警与显示仪;5)HDR-60-24仪用电源;6)AIL160-6绝缘故障定位仪。