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This paper presents a reliable, fast and simple system to detect and recover faults in computer networks at control center of power automation system. There is no way to get the information of the remote devices when networked system at control center is failed. The proposed system makes use of the insertion of smart switch (SS) into the ordinary automation system of power utilities to keep the network devices work properly. The suggested system overcomes the drawbacks associated with another propose system dealing with the same problem.