| 摘要 |
<p>PURPOSE: An electric safety monitoring device is provided to prevent a power supply which flows to a load side by opening a preventing switch of an electric line when a composition leakage current is detected, thereby preventing leakage fire and electric shock caused by sensitivity current even though a circuit breaker is not operated. CONSTITUTION: A monitoring unit comprises a receiving unit(31); a calculating unit(32); and a comparing unit(34). The receiving unit receives a leakage current signal outputted from a leakage breaker. The calculating unit determines whether the received leakage current is a composition leakage current or a resistibility leakage current or not and calculates leakage power and sensitivity current according to a determination result. The comparing unit outputs a controlling signal for alarm signal output to an alarm outputting unit(40). [Reference numerals] (31) Leakage current signal receiving unit; (32) 1. lg calculating unit, 2. lgr calculating unit, 3. Pgr calculating unit; (33) Reference value; (34) Comparing unit; (AA) Information display; (BB) Alarm device</p> |
