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Application of 7RE2800 Voltage Block Relay
Author(s): 
Pages: 41-43
Year: Issue:  4
Journal: HYDROPOWER AUTOMATION AND DAM MONITORING

Keyword:  继电器误动作闭锁定子接地保护匝间短路保护;
Abstract: 小浪底水力发电厂3号、4号机组发变组保护,在运行的几年间,曾发生发电机工况正常定子接地及匝间保护因一次熔断器熔断误动出口的现象.文中介绍应用7RE2800电压闭锁继电器闭锁ELIN公司80%定子接地保护和匝间保护的交流输入端的方法,解决了一次熔断器熔断时80%定子接地保护和匝间保护误动的问题,并提出预防电压互感器二次电压回路断线导致误闭锁的措施.
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