This paper presents a new method for an automated weak spot detection of the protection system of electrical energy systems. The intent was to find a fast and holistic approach. To fulfill the holistic requirement the settings of all relays should be analyzed in detail. A fuzzy system was developed therefore. The use of a fuzzy system enables the possibility of integration in an automated application. To prove the benefit a comparison has been done between the fuzzy system and the commonly proofed method finger-print analysis. This paper demonstrates the capability of the presented fuzzy system to detect weak spots globally, to identify the reasons in detail and to calculate the result very fast.