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本文通过 7SJ551多功能保护继电器在内蒙古化肥厂的应用对 7SJ551多功能继电器的特点、功能、原理、使用情况做了较为全面的论述说明
In this paper, 7SJ551 multi-function protection relay in the fertilizer plant in Inner Mongolia on the 7SJ551 multi-function relay features, functions, principles, the use of a more comprehensive discussion of the instructions