RED670保护装置二次回路设计注意的两个问题

Two problems in the design of secondary loop of RED670 protection device

通过研究ABB公司RED670线路差动保护装置,发现该装置不自带防跳、SF6压力闭锁、双母线系统二次电压自动切换和控制回路断线监视等功能,通过探讨制定出有些功能由GIS内部实现,有些功能必须外加元件实现的方法,同时也使零序电压保护问题迎刃而解。

By studying the ABB RED670 line differential protection, it is found that the device does not bring the jump, SF6 pressure blocking, double busbar system secondary voltage automatic switching, control loop break monitoring functions, through the discussion, some function by the internal implementation of GIS, some functions must plus components to realize, and also the zero sequence voltage protection problem solved.