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通钢集团板石矿业公司上青矿板石变电所于2006年进行了自动化改造。在改造中主变的后备保护、线路保护、电动机保护全部采用了 SEL551继电器,因此,对此继电器的了解程度及如何正确使用和维护就显得格外重要。(1)SEL551继电器可在线修改定值,不仅提高了供电可靠性,同时给现场调试和维护带来方便。
Tonghua Iron and Steel Group slab mining company on the green mine slab substation in 2006 for automation transformation. In the transformation of the main transformer backup protection, line protection, motor protection all use SEL551 relay, therefore, the understanding of the relay and how to properly use and maintain it is particularly important. (1) SEL551 relay can modify the setting online, which not only improves the power supply reliability, but also brings convenience to on-site debugging and maintenance.