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

A leakage protection plug, live ground wire technology, applied in the direction of automatic disconnection of emergency protection devices, emergency protection circuit devices, circuits, etc. problems to avoid electrical accidents

Inactive Publication Date: 2011-07-06
刘睿刚
5 Cites 3 Cited by

AI-Extracted Technical Summary

Problems solved by technology

Although this universal leakage protection plug is provided with a test circuit on the zero-sequence current transformer between the phase and neutral wires, it is used as a regular check to monitor the working ability of the zero-sequence current transformer, but it cannot Regularly check and monitor the working ability of the ground wire live detection sensor, so that once the ground wire live detection sensor fails during use (for example: the connection point of the secondary output end of the ground wire live de...
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Abstract

The invention discloses an all-round leakage protection plug for monitoring the live detectability of a ground wire. A series loop comprising a current-limiting resistor and a monitoring switch is connected between an internal phase line contact circuit and zero line contact circuit of the all-round leakage protection plug, and the series loop passes through a ground wire live detection inductor. When the ground wire live detection inductor passed by the ground wire has a fault, an all-round leakage protector having a fault can be found in time before an electrical hazard happens through periodical detection by a monitoring circuit, thus the fault can be eliminated in time, and the happening of the electrical hazard can be avoided.

Application Domain

Technology Topic

InductorPhase lead +4

Image

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

Examples

  • Experimental program(1)

Example Embodiment

[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.
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Description & Claims & Application Information

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