| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a power quality abnormality alarm system, which can be specialized in detecting whether there is any variation in voltage such as spontaneous voltage drop in supplied power, to allow a manufacturing device or the like for which much expense can not be spent to grasp the occurrence of the power quality abnormality and which can be introduced simply, inexpensively and easily. <P>SOLUTION: The alarm system for reporting the occurrence of power quality abnormality by monitoring the quality of supplied power is equipped with a voltage inputting section 11 for inputting the supplied power to be monitored, an abnormality detecting section 13 for detecting the abnormality in the supplied power by being applied with the supplied power input into the voltage inputting section, and an abnormality reporting section 15 for reporting the occurrence of the voltage quality abnormality detected by the abnormality detecting section. As the abnormality detecting section, an AC relay, which promptly switches a contact point by the voltage change in the applied voltage, is used to detect the abnormality of the supplied power. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
