（保护用电流互感器的）准确度限定的额定一次电流。

Rated accuracy limit primary current (of a protective current transformer)

为了使一次电流在零状态时减小到零后不再反方向流动，在两个滞后管中分别串入一个二极管。

In order to prevent the primary current from flowing in the reverse direction during zero state, two diodes are added in series with the lagging switches respectively.

研究了基于一次电流转移的限流器方案，它由快速开关和PTC电阻并联组成。

The FCL is composed of a fast switch and a PTC resistor connected in parallel.