如果通过24.1.4规定的循环周期的测试，则允许保护电子电路中的部件动作。
However, components in protective electronic circuits are allowed to operate provided they are tested for the number of cycles of operation specified in 24.1.4.
介绍一种便携式保护继电器测试装置的设计及实用电路和主要功能。
This paper introduces the portable protection relay detecting device and the practical circuit, as well as the major functions.
工业机械电气设备保护接地电路的连续性必须进行测试并满足一定要求。
The continuance of protective grounding circuits of industrial electro mechanical equipment must be tested and satisfy with the national standard.
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