POWER SUPPLY MONITORING SYSTEM

摘要

A METHOD FOR DETECTING PREDETERMINED FAULT CONDITIONS ASSOCIATED WITH THE SUPPLY OF AC ELECTRICAL POWER TO A CONSUMER, THE SUPPLY HAVING AN ACTIVE CONDUCTOR (14) AND A NEUTRAL CONDUCTOR (16) WITH THE NEUTRAL CONDUCTOR BEING CONNECTED TO EARTH. THE METHOD COMPRISES PROVIDING A FIRST CURRENT DETECTOR ASSOCIATED WITH THE ACTIVE CONDUCTOR; PROVIDING A SECOND CURRENT DETECTOR ASSOCIATED WITH THE NEUTRAL CONDUCTOR; PROVIDING A VOLTAGE DETECTOR TO DETECT VOLTAGE THE ACTIVE CONDUCTOR AND THE NEUTRAL CONDUCTOR; AND CHECKING A CURRENT RATIO OF NEUTRAL CURRENT TO ACTIVE CURRENT WHEREBY THE CURRENT RATIO IS PREDETERMINED FAULT CONDITION. ALSO DISCLOSED IS A METHOD OF CHECKING THE CONDITION OF SUPPLY LINE ACTIVE AND NEUTRAL CONDUCTORS IN A CONSUMER?S SUPPLIED PREMISES INCLUDING DETERMINING THE IMPEDANCE OF THE ACTIVE CONDUCTOR AND THE IMPEDANCE OF THE NEUTRAL CONDUCTOR TO INDICATE THE CONDITION OF EACH OF THE ACTIVE AND NEUTRAL CONDUCTORS.