DEVICE, METHOD, AND POWER DISTRIBUTION SYSTEM FOR PREVENTING ELECTRIC SHOCK AND FIRE IN CASE OF SHORT CIRCUIT AND GROUND FAULT

摘要

An electric shock and fire prevention device according to the present invention comprises: two or more power lines insulated from the ground with a resistance value equal to or greater than a predetermined ground resistance value; and one or more fault detectors including one end electrically connected to at least one of first neutral points having a potential between voltages of the two or more power lines and the other end electrically connected to the ground, wherein the fault detectors form a current path for a leakage current flowing to the ground from the first neutral points or the two or more power lines, so as to detect the leakage current. Accordingly, the present invention detects a leakage current between the ground and power lines which are insulated from the ground so as to supply power, and limits the leakage current to a level equal to or lower than a level of a dangerous current or blocks the leakage current from flowing to a human body or surrounding equipment, thereby preventing occurrence of electric shock and fire due to the leakage current.