电流互感器现场高压介损测量

高压介损能灵敏反映电流互感器的绝缘状况,预试中当tanδ超标或怀疑有其它绝缘缺陷时,需进行高电压下的tanδ测量,同时注意相应电容量的变化。串联补偿法用于电流互感器高压介损测量是解决现场试验电源问题有效方法,在现场进行高压介损测量时,特别要注意高压引线及强电场干扰的影响。对测量结果要进行综合分析。

High-voltage Dielectric Loss Measurement for Current Transformer on Site

The insulation condition of current transformer can be reflected sensitively by the high-voltage dielectric loss.When the tanδ exceeds standard or other insulation defect is suspected in the preventive test,it is necessary to measure the tanδ under high-voltage,and pay attention to the capacitance variation.The series-compensated method is an effective method to measure high-voltage dielectric loss in field test.Attention should be paid to the influence of the high-voltage leading wire and the electric field interference on the field test.Moreover,comprehensive analysis of measurement results should be conducted.