RESIDUAL CURRENT PROTECTION DEVICE

摘要

A residual current protection device, comprising: a first detection magnetic core (107) and a second detection magnetic core (108) which are borne around a conducting wire of a main loop; a first fault current detection circuit (102) coupled with the first detection magnetic core (107), wherein the first fault current detection circuit (102) is dependent on a grid voltage and conducts full current sampling on the main loop, so as to detect a high-frequency alternating current fault residual current, a pulse direct current residual current and a smooth direct current residual current; a second fault current detection circuit (103) coupled with the second detection magnetic core (108), wherein the second fault current detection circuit (103) conducts electromagnetic current sampling on the main loop independent of the grid voltage, so as to detect a power-frequency alternating current residual current and a pulse direct current residual current; a drive circuit (104), wherein the input thereof is connected to the first fault current detection circuit (102) and the second fault current detection circuit (103), and the output thereof is connected to an executing mechanism (106) to trigger the executing mechanism (106) to act; and a bipolar power source module (105) connected to the main loop and the first fault current detection circuit (102).