The maloperation of directional high-frequency relay composed of CKF integrated circuit protective device and receiving-trans mitting unit is analyzed with examples.

• 对由CKF集成电路保护装置与收发信机构成的方向高频保护误动进行了具体的实例分析，找出了误动的原因是保护装置出口延时太短和收发信机存在收信间断问题。