试论降低电磁式电流互感器设计容量的必要性

Discuss on the Necessity of the Reduction of Current Transformer's Capacity

随着测量技术和继电保护技术的发展,数字化、智能化仪表以及微机化保护装置的大量采用,供电系统中电磁式电流互感器二次侧的负荷已大大降低。但供电系统用电流互感器的设计标准至今未变,即仍要求生产厂家沿用多年前制定的相关标准中规定的额定容量来制造电磁式电流互感器,而该额定容量比现在的实际负荷要大很多。本文讨论二次侧负荷减小对电磁式电流互感器的影响,经过分析和论证,进而提出在电磁式电流互感器设计制造上应降低其二次侧额定容量的建议。

With the development of measurement technique and relay protection technology, as well as the digital intel- ligent instrument and protection equipment widely used, the burden of the current transformers have been decreased. However, until now the manufacturers are still following the traditional design standard, in which the rated capacity is much higher than the actual value. In this paper, the influence of the reduction burden on the current transformer is discussed firstly, and then the rated capacity of current transformer should be reduced is orooosed at last.