All-round leakage protection plug for monitoring live detectability of ground wire

[0010] The present invention is further described in detail through the following examples.

[0011] See figure 1 As shown, an all-around leakage protection plug with the ability to monitor the ground wire charging detection capability includes an all-around leakage protection plug 7. The plug is provided with a ground wire charging detection sensor 4 through which the ground wire passes, a phase wire and a zero The zero-sequence current transformer 6 through which the line passes, the test circuit 5 set on the zero-sequence current transformer 6, the phase line contact 8, the neutral line contact 9, the ground line contact 10, and the free tripping breaker . The series circuit composed of the current-limiting resistor 1, the monitoring switch 2, the wires 3, 11 is connected between the phase line contact 8 line and the neutral line contact 9 line, and the wire 3 passes through the ground line detection sensor 4 to form a pair The monitoring circuit of the working capability of the ground wire live detection sensor 4 in the all-round leakage protection plug 7.

[0012] When in use, the phase line contact 8, the neutral line contact 9, and the ground line contact 10 in the all-around leakage protection plug 7 are closed and connected. When the working capacity of the ground line detection sensor 4 needs to be monitored, press The monitoring switch 2 on the monitoring circuit mounted on the housing is closed and turned on, thereby forming a current path: phase contact 8--wire 11---current limiting resistor 1---monitoring switch 2---wire 3- --Neutral line contact 9, the current of the current path passes through the ground wire live detection sensor 4 to simulate an unexpected ground current through the ground wire live detection sensor 4, the all-around leakage protection plug 7 receives the ground wire live detection After the output signal of the sensor 4, it will trip instantly, and all three poles of the phase line contact 8, the neutral line contact 9 and the ground line contact 10 are disconnected, so that it can be judged that the ground line is charged to detect the sensor 4 and then the all-round leakage The working state of the protective plug 7 is normal, and it can be safely and safely put into normal operation after the regular inspection and monitoring are completed. If the all-around leakage protection plug 7 cannot be tripped after the monitoring switch 2 is pressed, it can be judged that the ground wire live detection sensor 4 or the all-around leakage protection plug 7 has failed. In this case, stop using it immediately and notify the professionals. Check and solve. By regularly operating the monitoring switch 2 on the monitoring circuit, the working capacity of the ground wire detection sensor 4 can be monitored, so that if the ground wire detection sensor 4 fails, accidental charging or accidents can occur on the ground wire. It is excluded and resolved in time before occurrence to ensure safe use.