用于测量电网和配电网中地磁感应电流 [GIC] 的直流电流传感器

产品优势

• 高分辨率（1000:1）
• 低残留偏移
• 分体式铁芯
• 双向
• 非接触式
• 输入/输出隔离
• 低功耗
• 户外安装
• 温度范围广
• 导管附件（刚性 1/2” 12.7 毫米直径）

描述

CTH-GIC transducers are able to measure DC currents including very low frequency ac, in the presence of higher levels of AC current at the power frequency. The CTH-GIC effectively attenuates the power frequency current allowing the DC and 'VLF' AC currents to be measured. This enables accurate measurement of Geomagnetically Induced Currents (GIC) on power grids and DC components potentially harming and degrading distribtion equipment. The device operates over a wide dynamic range and maintains low-level accuracy even after a large over-range. The GIC’s inherently low residual effect eliminates the need to degauss in all but extreme circumstances. The split-core enclosure, with captive hardware and outdoor rating, makes installation easy and does not require circuit interruption.

为什么要测量地磁感应电流 (GIC)

地磁感应电流 (GIC) 可能由地磁风暴引起，地磁风暴​​是一种太空天气事件，地球磁场受到太阳磁性物质的干扰。大多数 GIC 是由日冕物质抛射 (CME) 引发的，日冕物质抛射与地球周围的磁场相互作用，导致地球磁场暂时“震颤”。快速变化的磁场会在长电导体装置（如电网和配电网络）中电磁感应出电流。GIC 还可以流过铁轨、地下管道和电网。在极端情况下，它们可能会导致停电，如电压降低，有时甚至会造成停电。