PROTECTIVE RELAY DEVICE

PURPOSE:To eliminate a setting error, a mistake of a subject relay of setting, etc., control a setting, and facilitate setting at site by providing an input part for inputting the relay setting, a display part, a memorizing part, and a control part or the like. CONSTITUTION:An input part 2 inputs a relay setting, a display part 4 displays the inputted value, and a memorizing part 5 memorizes the inputted value. A control part 3 detects a difference by the sort or level of a transmitted/ received signal, and sends a control signal or an alarm display signal to a device. A level detecting part 19 for detecting an input level is connected with the part 2, a determining part 17 for comparing the setting memorized at the part 5 with the detected level at the part 9 is connected with the part 19, and an outputting part 18 for giving an alarming output when an abnormality is determined is connected with the part 17. When a signal from a relay setter is received, a device number is recognized first, and when it is different from a value set by the setter, receiving action is stopped. As a result, a relay setting error or the like is eliminated, and control of the settings or the like is facilitated.