A circuit breaker capable of monitoring power lines

Abstract

The application relates to a circuit breaker capable of monitoring power lines, which is provided with a power line monitoring circuit comprising a leakage current detection circuit and a state judgment circuit, and is capable of monitoring the on-off state of the shielded wire of the power line. When leakage current appears between the phase line and the zero line of the power line or the shielded wire is disconnected, the circuit breaker can automatically cut off the connection between the electric appliance and the power source, so as to avoid the occurrence of electric shock and fire accidents.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power safety protection, in particular to a circuit breaker capable of monitoring power lines. BACKGROUND

[0002] In daily power use, some arc fault fire events caused by damaged, aged, poorly insulated, and overheat carbonized power lines occur from time to time.

[0003] The Chinese patent bulletin discloses a leakage detection circuit breaker device (CN204928073U) for detecting leakage current between phase lines and zero lines of power lines, preventing leakage current between phase lines and zero lines due to aging and poor insulation, but since the leakage current value is generally small, it is not enough to cause overload protector and short circuit protector to act, thus, the device is needed to detect and protect, preventing electrical fire events. The device is mainly made into a circuit breaker with a plug power line, used to detect whether leakage current occurs between phase lines, zero lines and shielding net conductors in the power line between the power plug and the electrical appliance, if abnormal signals are detected, the circuit breaker is tripped to prevent fire events. However, the device has the following shortcomings: the shielding net conductors for detection are not monitored, if the shielding net conductors are partially broken, the device can still work normally, but it cannot provide detection protection for the broken part of the power line, if the part of the power line has arc fault, electrical fire accidents may still occur. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a circuit breaker capable of monitoring power lines, which can not only detect leakage current between phase lines and zero lines of power lines, but also monitor the on-off state of shielding net conductors of the power lines.

[0005] The technical solution provided by the present application is as follows:

[0006] A circuit breaker capable of monitoring power line, comprising a housing, a plug pin, a power line, a rectifier circuit, an electromagnetic tripping and locking device, the electromagnetic tripping and locking device comprising an electromagnetic coil and switch contacts, a test circuit, a first trigger drive circuit, the power line comprising a phase line and its insulation protective layer, a zero line and its insulation protective layer, and a woven shielding mesh conductor, the first trigger drive circuit comprising a first thyristor, a first resistor, and a second resistor, and further comprising a power line monitoring circuit; the power line monitoring circuit comprising a third resistor, a fourth resistor, a leakage current detection circuit, and a state judgment circuit; the state judgment circuit comprising a first terminal, a second terminal, and a third terminal; one end of the third resistor, one end of the electromagnetic coil, the first terminal of the state judgment circuit, and the anode terminal of the first thyristor are connected in parallel, the other end of the third resistor, one end of the fourth resistor, the second terminal of the state judgment circuit, and one end of the leakage current detection circuit are connected in parallel to form a first junction; the other end of the fourth resistor, one end of the first resistor, the third terminal of the state judgment circuit, and the other end of the leakage current detection circuit are connected in parallel to form a second junction; the other end of the first resistor, the control terminal of the first thyristor, and one end of the second resistor are connected in parallel; the cathode terminal of the first thyristor, the other end of the second resistor, and the power supply terminal of the rectifier circuit are connected in parallel.

[0007] The state judgment circuit comprises a second thyristor, the first terminal of the state judgment circuit is the anode terminal of the second thyristor, the second terminal of the state judgment circuit is the control terminal of the second thyristor, and the third terminal of the state judgment circuit is the cathode terminal of the second thyristor.

[0008] The state judgment circuit comprises a triode.

[0009] The triode is an NPN triode, the first terminal of the state judgment circuit is the collector terminal of the NPN triode, the second terminal of the state judgment circuit is the base terminal of the NPN triode, and the third terminal of the state judgment circuit is the emitter terminal of the NPN triode.

[0010] The power line is provided with a woven shielding mesh conductor, which comprises a phase line shielding mesh conductor wrapped around the outer surface of the phase line insulation protective layer and a zero line shielding mesh conductor wrapped around the outer surface of the zero line insulation protective layer.

[0011] At least one of the outer surfaces of the phase line shielding mesh conductor and the zero line shielding mesh conductor is provided with an insulation protective layer; the leakage current detection circuit comprises the zero line shielding mesh conductor and the phase line shielding mesh conductor connected in series, one end of the leakage current detection circuit is one end of the zero line shielding mesh conductor, the other end of the zero line shielding mesh conductor and the other end of the phase line shielding mesh conductor are connected in series, and one end of the phase line shielding mesh conductor is the other end of the leakage current detection circuit.

[0012] The signal wire with an insulation protective layer is arranged in the power line; the leakage current detection circuit is formed by connecting the zero line shielding net wire and the phase line shielding net wire in parallel and then connecting the signal wire in series; one end of the zero line shielding net wire and one end of the phase line shielding net wire are connected in parallel to form one end of the leakage current detection circuit, the other end of the zero line shielding net wire, the other end of the phase line shielding net wire and the other end of the signal wire are connected in parallel, and one end of the signal wire is the other end of the leakage current detection circuit.

[0013] The shielding net wire with a woven shape is arranged in the power line, and the shielding net wire with a woven shape is composed of a common shielding layer wire wrapping at least the outer surface of the phase line insulation protective layer and the outer surface of the zero line insulation protective layer; the signal wire with an insulation protective layer is arranged in the power line; one end of the common shielding layer wire is one end of the shielding net wire with a woven shape in the power line, and the other end of the common shielding layer wire is the other end of the shielding net wire with a woven shape in the power line; one end of the shielding net wire with a woven shape in the power line is one end of the leakage current detection circuit, the other end of the shielding net wire with a woven shape in the power line and the other end of the signal wire are connected in series, and one end of the signal wire is the other end of the leakage current detection circuit.

[0014] Compared with the prior art, the present application has the following remarkable effects:

[0015] In addition to detecting the abnormal leakage current arc fault between the phase line and the zero line of the power line and automatically tripping off the power, the circuit breaker can also detect and monitor the shielding net wire of the power line, and will automatically trip off the power if the leakage current detection circuit is disconnected; meanwhile, through the ingenious arrangement of the leakage current detection circuit, the third resistor, the fourth resistor and the state judgment circuit, the circuit breaker can be produced at a lower cost, the production process is simplified, and the reliability of the product is improved, and the circuit breaker can maximize the avoidance of the occurrence of electrical fire accidents.

[0016] The circuit breaker is mainly formed in the form of a plug power line product with a circuit breaker function, and is applied in a household appliance as a power supply line of the electrical appliance. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the external view of the circuit breaker for monitoring the power line.

[0018] Figure 2 is the first embodiment circuit principle schematic diagram of the circuit breaker for monitoring the power line.

[0019] Figure 3 is Figure 2 the cross-sectional structure schematic diagram of the power line.

[0020] Figure 4 is a second embodiment circuit principle diagram of a circuit breaker capable of monitoring power line of the present application.

[0021] Figure 5 is Figure 4 a cross-sectional structure diagram of the power line shown.

[0022] Figure 6 is a third embodiment circuit principle diagram of a circuit breaker capable of monitoring power line of the present application.

[0023] Figure 7 is Figure 6 a cross-sectional structure diagram of the power line shown. DETAILED DESCRIPTION

[0024] The present application is further illustrated by the following examples.

[0025] Example 1:

[0026] Referring to Figs. Figure 1 , 2 , 3, a circuit breaker capable of monitoring power line 1, comprising a housing, a plug pin, a power line 1, a rectifier circuit 3, an electromagnetic tripping and locking device, the device comprising an electromagnetic coil and switch contacts, a test circuit 6, a first trigger drive circuit 4, the power line 1 comprising a phase line 1-1 and its insulating protective layer 1-1-1, a zero line 1-2 and its insulating protective layer 1-2-1, a woven shielding mesh wire 53-1, the first trigger drive circuit 4 comprising a first thyristor 4-1, a first resistor 4-2, a second resistor 4-3, and further comprising a power line monitoring circuit 5; the power line monitoring circuit 5 is composed of a third resistor 51-1, a fourth resistor 51-2, a leakage current detection circuit 53 and a state judgment circuit 52; the state judgment circuit 52 is provided with a first foot end 52-2, a second foot end 52-3, and a third foot end 52-4; one end of the third resistor 51-1, one end of the electromagnetic coil 2, the first foot end 52-2 of the state judgment circuit 52, and the anode end of the first thyristor 4-1 are connected in parallel, the other end of the third resistor 51-1, one end of the fourth resistor 51-2, the second foot end 52-3 of the state judgment circuit 52, and one end 53-2 of the leakage current detection circuit 53 are connected in parallel to form a first junction 51-3; the other end of the fourth resistor 51-2, one end 4-4 of the first resistor 4-2, the third foot end 52-4 of the state judgment circuit 52, and the other end 53-3 of the leakage current detection circuit 53 are connected in parallel to form a second junction 51-4; one end of the second resistor 4-3, the control end of the first thyristor 4-1, and the other end of the first resistor 4-2 are connected in parallel; the cathode end of the first thyristor 4-1, the other end of the second resistor 4-3, and the power supply end 3-1 of the rectifier circuit 3 are connected in parallel.

[0027] In the embodiment, the state judging circuit 52 is composed of a second controllable silicon 52-1, the first pin end 52-2 of the state judging circuit 52 is the anode end of the second controllable silicon 52-1, the second pin end 52-3 is the control end of the second controllable silicon 52-1, and the third pin end 52-4 is the cathode end of the second controllable silicon 52-1.

[0028] Alternatively, the state judging circuit 52 can also be composed of a triode to replace, as shown in Figure 4 or Figure 6 The triode is an NPN triode 52-5, the first pin end 52-2 of the state judging circuit 52 is the collector end of the NPN triode 52-5, the second pin end 52-3 is the base end of the NPN triode 52-5, and the third pin end 52-4 is the emitter end of the NPN triode 52-5.

[0029] In the embodiment, the test circuit 6 is a test button, one end and the other end of which are connected in parallel with one end and the other end of the third resistor 51-1, respectively.

[0030] Alternatively, the electrical connection mode of the test circuit 6 can be changed as follows: one end and the other end of the test circuit 6 are connected in parallel with the phase line 1-1 and the other end of the third resistor 51-1, respectively, as shown in Figure 4 .

[0031] Alternatively, the electrical connection mode of the test circuit 6 can be changed as follows: one end and the other end of the test circuit 6 are connected in parallel with the phase line 1-1 and the other end of the third resistor 51-1, respectively, as shown in Figure 6 In the embodiment, the power line 1 is provided with a braided shielding mesh wire 53-1, which is composed of a braided phase line shielding mesh wire 1-1-2 wrapped on the outer surface of the phase line insulation protective layer 1-1-1 and a braided zero line shielding mesh wire 1-2-2 wrapped on the outer surface of the zero line insulation protective layer 1-2-1.

[0032] In the embodiment, at least one of the outer surfaces of the phase wire shielding net conductor 1-1-2 and the zero wire shielding net conductor 1-2-2 is provided with an insulation protective layer. In this embodiment, the outer surface of the phase wire shielding net conductor 1-1-2 is provided with an insulation protective layer 1-1-3 wrapping the phase wire shielding net conductor. The leakage current detection circuit 53 is formed by connecting the zero wire shielding net conductor 1-2-2 and the phase wire shielding net conductor 1-1-2 in series. One end 53-2 of the leakage current detection circuit 53 is connected to one end of the zero wire shielding net conductor 1-2-2. The other end of the zero wire shielding net conductor 1-2-2 is connected to the other end of the phase wire shielding net conductor 1-1-2. One end of the phase wire shielding net conductor 1-1-2 is the other end 53-3 of the leakage current detection circuit 53.

[0033] Alternatively, the outer surface of the zero wire shielding net conductor 1-2-2 is provided with an insulation protective layer 1-2-3 wrapping the zero wire shielding net conductor 1-2-2. Alternatively, the outer surfaces of the phase wire shielding net conductor 1-1-2 and the zero wire shielding net conductor 1-2-2 are both provided with insulation protective layers wrapping the shielding net conductors.

[0034] Figure 3 Fig. 1-1 is a schematic diagram of the cross-sectional structure of the power line 1 in the embodiment, in which the outer surface of the phase wire shielding net conductor 1-1-2 is provided with an insulation protective layer 1-1-3 wrapping the shielding net conductor. In the embodiment, the zero wire shielding net conductor 1-2-2 is not provided with an insulation protective layer for reducing the cost of the product. 1-5 represents the insulation protective layer of the power line 1. 1-1-3 represents the insulation protective layer of the phase wire shielding net conductor 1-1-2. 1-1-1 represents the insulation protective layer of the phase wire 1-1. 1-2-1 represents the insulation protective layer of the zero wire 1-2. 1-3-1 represents the insulation protective layer of the ground wire 1-3.

[0035] The monitoring process of the shielded wire 53-1 of the power line is as follows: when the circuit breaker is reset and powered on, the fourth resistor 51-2 in the power line monitoring circuit 5 supplies power to the leakage current detection circuit 53 and checks the state of the leakage current detection circuit 53. If the connection between the phase line shielded wire 1-1-2 and the zero line shielded wire 1-2-2 is complete, the leakage current detection circuit 53 is a complete path state, the voltage across the leakage current detection circuit 53 is zero volts, the voltage between the first node 51-3 and the second node 51-4 is clamped to zero volts, and the voltage between the second terminal 52-3 and the third terminal 52-4 of the state judgment circuit 52 is also clamped to zero volts, so that the second thyristor 52-1 of the state judgment circuit 52 and the first thyristor 4-1 of the first trigger drive circuit 4 are in cut-off, and the circuit breaker remains reset and powered on. If any of the phase line shielded wire 1-1-2 or the zero line shielded wire 1-2-2 is open, the leakage current detection circuit 53 is an open circuit state, a signal will be generated across the leakage current detection circuit 53, and the fourth resistor 51-2 connected in parallel between the first node 51-3 and the second node 51-4 can adjust the size of the signal and make the second thyristor 52-1 of the state judgment circuit 52 and the first thyristor 4-1 of the first trigger drive circuit 4 conductive to trip the circuit breaker and terminate the use of the circuit breaker in the case of a fault in the shielded wire 53-1 causing the leakage current detection circuit 53 to be open, thereby avoiding the occurrence of an electrical fire.

[0036] The principle and technology of detecting the leakage current between the phase line, zero line, etc. in the power line are known and will not be described here.

[0037] Example 2

[0038] Referring to Figure 1 , 4 , 5, compared with example 1, the difference between this embodiment is that the structure of the power line 1 and the electrical connection mode of the zero line shielded wire 1-2-2 and the phase line shielded wire 1-1-2 in the leakage current detection circuit 53 are changed. In this embodiment, the zero line shielded wire 1-2-2 and the phase line shielded wire 1-1-2 are connected in parallel, so the outer surface of the zero line shielded wire 1-1-2 and the outer surface of the phase line shielded wire 1-1-2 do not need to be wrapped with an insulating protective layer.

[0039] In this embodiment, the power line 1 is provided with a woven shielded wire 53-1, which is composed of a woven phase line shielded wire 1-1-2 wrapped around the outer surface of the phase line insulating protective layer 1-1-1 and a woven zero line shielded wire 1-2-2 wrapped around the outer surface of the zero line insulating protective layer 1-2-1.

[0040] In the embodiment, the power line 1 is also provided with a signal wire 1-4 with an insulating protective layer; the leakage current detection circuit 53 is connected in series by connecting the zero line shielding net wire 1-2-2 and the phase line shielding net wire 1-1-2 in parallel first, and then connecting the signal wire 1-4; one end of the zero line shielding net wire 1-2-2 and one end of the phase line shielding net wire 1-1-2 are connected in parallel to form one end 53-2 of the leakage current detection circuit 53, the other end of the zero line shielding net wire 1-2-2, the other end of the phase line shielding net wire 1-1-2 and the other end of the signal wire 1-4 are connected in parallel, and one end of the signal wire 1-4 is the other end 53-3 of the leakage current detection circuit 53.

[0041] In the embodiment, the zero line shielding net wire 1-2-2 and the phase line shielding net wire 1-1-2 are connected in parallel, when any one of the zero line shielding net wire 1-2-2 and the phase line shielding net wire 1-1-2 is disconnected, the circuit breaker cannot trip and power off, but the function of detecting the leakage current protection can still be provided, when the detected leakage current is abnormal, the circuit breaker will automatically trip; when the zero line shielding net wire 1-2-2 and the phase line shielding net wire 1-1-2 are disconnected or the signal wire 1-4 is disconnected, the circuit breaker will automatically trip.

[0042] In the embodiment, the state judgment circuit 52 is composed of an NPN transistor, the selected transistor is an NPN transistor 52-5, the first pin end 52-2 of the state judgment circuit 52 is the collector end of the NPN transistor 52-5, the second pin end 52-3 is the base end of the NPN transistor 52-5, and the third pin end 52-4 is the emitter end of the NPN transistor 52-5.

[0043] As shown in Figure 2 As shown in

[0044] In the embodiment, one end and the other end of the test circuit 6 are connected in parallel with the zero line 1-2 and the other end of the third resistor 51-1, respectively.

[0045] As shown in Figure 2

[0046] ​Optionally, the electrical connection of the test circuit 6 can also be modified as follows: one end of the test circuit 6 is connected in parallel with the phase line 1-1 and the other end of the third resistor 51-1, instead of being connected in series with the phase line 1-1 and the other end of the third resistor 51-1, as shown in Figure 6

[0047] Figure 5 is a schematic diagram of the cross-sectional structure of the power line 1 of the present embodiment, wherein 1-5 represents the insulating protective layer of the power line 1; 1-1-2 represents the phase line shielding net conductor, 1-1-1 represents the insulating protective layer of the phase line 1-1, 1-2-2 represents the zero line shielding net conductor, 1-2-1 represents the insulating protective layer of the zero line 1-2, 1-3-1 represents the insulating protective layer of the ground line 1-3, and 1-4-1 represents the insulating protective layer of the signal conductor 1-4.

[0048] The circuit structure principle of the leakage current detection circuit 53 and the state judgment circuit 52 for monitoring the power line 1, and the working process of detecting the leakage current between the phase line and the zero line of the power line 1 are the same as those of Embodiment 1, and thus will not be described here again.

[0049] Embodiment 3

[0050] Referring to Figure 1 , 6 , 7, compared with Embodiment 1, the present embodiment changes the electrical connection between the shielding net conductor 53-1 in the leakage current detection circuit 53 and the signal conductor 1-4 with an insulating protective layer on the basis of Embodiment 1.

[0051] The power line 1 is further provided with a signal conductor 1-4 with an insulating protective layer; the woven shielding net conductor 53-1 in the power line 1 is composed of a common shielding layer conductor 1-6 wrapped around the outer surfaces of the insulating protective layer 1-1-1 of the phase line 1-1 and the insulating protective layer 1-2-1 of the zero line 1-2; one end of the common shielding layer conductor 1-6 is one end of the shielding net conductor 53-1, and the other end of the common shielding layer conductor 1-6 is the other end of the shielding net conductor 53-1; one end of the shielding net conductor 53-1 is one end 53-2 of the leakage current detection circuit 53, the other end of the shielding net conductor 53-1 is connected in series with the other end of the signal conductor 1-4, and one end of the signal conductor 1-4 is the other end 53-3 of the leakage current detection circuit 53.

[0052] In the present embodiment, the common shielding layer conductor 1-6 is wrapped around the outer surfaces of the insulating protective layer 1-4-1 of the signal conductor 1-4 and the insulating protective layer 1-3-1 of the ground line 1-3 in addition to being wrapped around the outer surfaces of the insulating protective layer 1-1-1 of the phase line 1-1 and the insulating protective layer 1-2-1 of the zero line 1-2.​

[0053] Alternatively, the power cord can also be designed as follows: the common shielding layer wire 1-6 only wraps the outer surface of the phase wire 1-1 insulation protection layer 1-1-1 and the outer surface of the zero wire 1-2 insulation protection layer 1-2-1, and the signal wire 1-4 and its insulation protection layer 1-4-1, the ground wire 1-3-1 and its insulation protection layer 1-3-1 are arranged outside the outer surface of the common shielding layer wire 1-6 but inside the insulation protection layer 1-5 of the power cord 1.

[0054] In the embodiment, the state judgment circuit 52 is composed of a transistor, and the transistor is an NPN transistor 52-5. The first terminal 52-2 of the state judgment circuit 52 is the collector terminal of the NPN transistor 52-5, the second terminal 52-3 is the base terminal of the NPN transistor 52-5, and the third terminal 52-4 is the emitter terminal of the NPN transistor 52-5.

[0055] Alternatively, as shown in FIG. 6, the state judgment circuit 52 is composed of a second thyristor 52-1 to replace the transistor, and the first terminal 52-2 of the state judgment circuit 52 is the anode terminal of the second thyristor 52-1, the second terminal 52-3 is the control terminal of the second thyristor 52-1, and the third terminal 52-4 is the cathode terminal of the second thyristor 52-1. Figure 2 In the embodiment, one end and the other end of the test circuit 6 are connected in parallel with the phase wire 1-1 and the other end of the third resistor 51-1, respectively.

[0056] Alternatively, the electrical connection of the test circuit 6 can also be changed as follows: one end and the other end of the test circuit 6 are connected in parallel with one end and the other end of the third resistor 51-1, respectively, to replace the original connection, as shown in FIG. 7.

[0057] Figure 2

[0058] Alternatively, the electrical connection of the test circuit 6 can also be changed as follows: one end and the other end of the test circuit 6 are connected in parallel with the zero wire 1-2 and the other end of the third resistor 51-1, respectively, to replace the original connection, as shown in FIG. 8. Figure 4

[0059] Figure 7 FIG. 5 is a schematic diagram of the cross-sectional structure of the power cord 1 of the embodiment, wherein 1-5 represents the insulation protection layer of the power cord 1, 1-6 represents the common shielding layer wire, 1-1-1 represents the insulation protection layer of the phase wire 1-1, 1-2-1 represents the insulation protection layer of the zero wire 1-2, 1-3-1 represents the insulation protection layer of the ground wire 1-3, and 1-4-1 represents the insulation protection layer of the signal wire 1-4.

[0060] ​​​The circuit structure principle of the leakage current detection circuit 53 and the state judging circuit 52 for monitoring the power line 1 and the working process of detecting the leakage current between the phase line and the zero line of the power line 1 are the same as those of Embodiment 1, and thus will not be described again.

Claims

1. A circuit breaker capable of monitoring a power line, comprising a housing, a plug pin, a power line, a rectifier circuit, and an electromagnetic tripping and locking device, wherein the electromagnetic tripping and locking device comprises an electromagnetic coil and two switch contacts, a rectifier circuit, and a first trigger drive circuit, wherein the other end of the electromagnetic coil and the common terminal of the rectifier circuit are respectively connected to the output terminals of the two switch contacts, the power line comprises a phase wire and its insulating protective layer, a neutral wire and its insulating protective layer, and a braided shielded wire, and the first trigger drive circuit comprises a first thyristor, a first resistor, and a second resistor, characterized in that: The power line monitoring circuit is composed of a third resistor, a fourth resistor, a leakage current detection circuit and a state judgment circuit; the state judgment circuit is provided with a first terminal, a second terminal and a third terminal; one end of the third resistor, one end of the electromagnetic coil, the first terminal of the state judgment circuit and the anode terminal of the first thyristor are connected in parallel, the other end of the third resistor, one end of the fourth resistor, the second terminal of the state judgment circuit and one end of the leakage current detection circuit are connected in parallel to form a first junction; the other end of the fourth resistor, one end of the first resistor, the third terminal of the state judgment circuit and the other end of the leakage current detection circuit are connected in parallel to form a second junction; the other end of the first resistor, the control terminal of the first thyristor and one end of the second resistor are connected in parallel; the cathode terminal of the first thyristor, the other end of the second resistor and the power terminal of the rectifier circuit are connected in parallel.

2. The circuit breaker capable of monitoring a power line according to claim 1, characterized in that: The state judgment circuit is composed of a second thyristor, the first terminal of the state judgment circuit is the anode terminal of the second thyristor, the second terminal is the control terminal of the second thyristor and the third terminal is the cathode terminal of the second thyristor.

3. The circuit breaker capable of monitoring a power line according to claim 1, wherein: The state judgment circuit is composed of a triode.

4. The circuit breaker capable of monitoring a power line according to claim 3, wherein: The triode is an NPN triode, the first terminal of the state judgment circuit is the collector terminal of the NPN triode, the second terminal is the base terminal of the NPN triode and the third terminal is the emitter terminal of the NPN triode.

5. The circuit breaker capable of monitoring a power cord of claim 1, wherein: The power line is provided with a shielding net conductor in a woven form, which is composed of a phase line shielding net conductor wrapped in a woven form on the outer surface of the phase line insulation protective layer and a zero line shielding net conductor wrapped in a woven form on the outer surface of the zero line insulation protective layer.

6. The circuit breaker capable of monitoring a power line according to claim 1 or 5, characterized in that: At least one of the outer surfaces of the phase line shielding net conductor and the zero line shielding net conductor is provided with an insulation protective layer; the leakage current detection circuit is composed of the zero line shielding net conductor and the phase line shielding net conductor in series, one end of the leakage current detection circuit is one end of the zero line shielding net conductor, the other end of the zero line shielding net conductor and the other end of the phase line shielding net conductor are connected in series, and one end of the phase line shielding net conductor is the other end of the leakage current detection circuit.

7. The circuit breaker capable of monitoring a power line according to claim 1 or 5, characterized in that: The power line is further provided with a signal conductor with an insulation protective layer; the leakage current detection circuit is composed of the zero line shielding net conductor and the phase line shielding net conductor connected in parallel first and then connected in series with the signal conductor; one end of the zero line shielding net conductor and one end of the phase line shielding net conductor are connected in parallel to become one end of the leakage current detection circuit, the other end of the zero line shielding net conductor, the other end of the phase line shielding net conductor and the other end of the signal conductor are connected in parallel, and one end of the signal conductor is the other end of the leakage current detection circuit.

8. The circuit breaker capable of monitoring a power line according to claim 1, wherein: The power line is provided with a woven shielding net conductor, which is composed of a common shielding layer conductor wrapping the outer surface of the phase line insulating protective layer and the outer surface of the zero line insulating protective layer; the power line is also provided with a signal conductor with an insulating protective layer; one end of the common shielding layer conductor is one end of the woven shielding net conductor in the power line, and the other end of the common shielding layer conductor is the other end of the woven shielding net conductor in the power line; one end of the woven shielding net conductor in the power line is one end of the leakage current detection circuit, and the other end of the woven shielding net conductor in the power line and the other end of the signal conductor are connected in series, and one end of the signal conductor is the other end of the leakage current detection circuit.

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