exclusiveness

The current protection relay can operate properly when its setting value is less than the accurate limit current.

在通过互感器电流达到准确限值电流后继续增大,二次电流虽然不能与一次电流成比例变化,但其值(含有效值、平均值及由傅氏算法求出的基波值)却还是呈上升趁势。

The paper also presents drawing method of relation curve of accuracy limit factor and secondary burden.

分析了电流互感器复合误差所涉及到的各个方面,从应用层面说明了互感器对复合误差的要求,进而介绍复合误差的直接测量法和间接测量法,文中提到的两种方法都是实用、易行的,并且叙述了电流互感器准确限值系数与二次负荷关系曲线的绘制方法,另外还列举出实例进行说明。

So that to decrease the accuracy limit factor an idea to take the protective duty of internal faults cooperating with unclosed differential protections of the generator transformer/main transformer and the relay protection special for the excitation transformer is presented.

提出利用发电机变压器组的不完全接线差动保护和励磁变压器专用保护共同分担整个励磁变压器保护 ,以便降低对其高压侧电流互感器准确限值系数要求 ,并对励磁变压器高压侧电流互感器额定电流比选择给出参考意见。