CN220673380U - Protection device for arc and leakage faults - Google Patents

Abstract

Embodiments of the present disclosure provide a protection device for arc and leakage faults. The protection device comprises: the leakage detection circuit comprises a leakage signal acquisition unit for acquiring a first detection signal in a power supply line; the arc detection circuit comprises an arc signal acquisition unit for acquiring a second detection signal in the power supply line; a first processing unit coupled to the leakage detection circuit and configured to identify a leakage fault signal in the power supply line based on the first detection signal; a second processing unit coupled to the arc signal acquisition unit and configured to identify an arc fault signal in the power supply line based on the second detection signal; and an execution unit coupled to the first processing unit and the second processing unit and configured to open a switch located in the power supply line in response to at least one of the arc fault signal and the leakage fault signal. Thus, the detection of the leakage fault and the arc fault can be satisfied at the same time.

Description

Protection device for arc and leakage faults

Technical Field

Example embodiments of the present disclosure relate generally to the field of arc and leakage protection, and in particular, to a protection device for arc and leakage faults.

Background

With the continuous development of power electronics technology, while the degree of electrification is increasing, arc (i.e., discharge) and leakage faults are common safety issues in power systems and household electricity. It is important for the timely detection of these faults and therefore reliable protection devices need to be developed to identify them.

However, the conventional protector at present has only arc protection or leakage protection functions, and cannot meet the requirements of personal safety protection.

Disclosure of Invention

It is an object of the present disclosure to provide an arc and leakage fault protection device and electronic apparatus that at least partially address the above-identified and/or other potential problems with conventional protectors.

In a first aspect of the present disclosure, a protection device for arc and leakage faults is provided. The protection device comprises: the leakage detection circuit comprises a leakage signal acquisition unit, a detection unit and a detection unit, wherein the leakage signal acquisition unit is coupled with a phase line and a neutral line of a power supply line to acquire a first detection signal in the power supply line; the arc detection circuit comprises an arc signal acquisition unit which is coupled to a phase line of the power supply line to acquire a second detection signal in the power supply line; a first processing unit coupled to the leakage detection circuit and configured to identify a leakage fault signal in the power supply line based on the first detection signal; a second processing unit coupled to the arc signal acquisition unit and configured to identify an arc fault signal in the power supply line based on the second detection signal; and an execution unit coupled to the first processing unit and the second processing unit and configured to cause the execution unit to open a switch located in the power supply line in response to at least one of the arc fault signal and the leakage fault signal.

According to the embodiment of the disclosure, the protection device for the electric arc and the electric leakage faults can provide effective protection for the electric leakage faults on the premise of meeting the protection for the electric arc faults, so that the traditional electric arc protector and the electric leakage protector are skillfully integrated, the detection of faults caused by circuit electric leakage can be obviously improved, the tripping response time is greatly shortened, and the requirement for personal safety protection can be met. Other benefits will be described below in connection with the corresponding embodiments.

In some embodiments, the protection device further comprises: and a detection signal processing unit coupled between the arc detection circuit and the second processing unit and configured to filter and amplify the second detection signal for the processing unit to identify an arc fault signal.

In some embodiments, the first processing unit is coupled to the second processing unit and is configured to send the identified leakage fault signal to the second processing unit to generate a storage signal for recording the leakage fault.

In some embodiments, the leakage signal acquisition unit comprises a zero sequence current transformer.

In some embodiments, the arc signal acquisition unit includes a sampling resistor.

In some embodiments, the protection device further comprises: and a fault indication unit coupled to at least the second processing unit and configured to indicate different signals based on the difference between the arc fault signal and the leakage fault signal.

In some embodiments, the fault indication unit comprises: an indicator light that indicates the type of fault by at least one of flashing frequency or by flashing color.

In some embodiments, the protection device further comprises: the power supply unit is coupled with the leakage signal acquisition unit and the second processing unit of the leakage detection circuit.

In some embodiments, the protection device further comprises a thyristor having a control electrode coupled to the first processing unit and the second processing unit, and an anode coupled to the execution unit.

In some embodiments, the protection device further comprises a transistor having a base coupled to the second processing unit and a collector coupled to the control electrode of the thyristor.

In a second aspect of the present disclosure, a protective device is provided. The protection device comprises: the protection device according to the first aspect; and an execution unit coupled to the protection device and the power supply line, and for opening a switch of the power supply line according to at least one of the arc fault signal and the leakage fault signal.

It should be understood that what is described in this section of the disclosure is not intended to limit key features or essential features of the embodiments of the disclosure, nor is it intended to limit the scope of the disclosure. Other features of the present disclosure will become apparent from the following description.

Drawings

The above and other features, advantages and aspects of embodiments of the present disclosure will become more apparent by reference to the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, wherein like or similar reference numerals denote like or similar elements, in which:

FIG. 1 illustrates an architectural diagram for detecting arc and leakage faults according to some embodiments of the present disclosure;

FIG. 2 illustrates a circuit schematic of a first processing unit coupled to a second processing unit in accordance with some embodiments of the present disclosure;

FIG. 3 illustrates a circuit schematic of an LED indicator light according to some embodiments of the present disclosure;

fig. 4 illustrates a circuit schematic of a protection device according to some embodiments of the present disclosure.

Reference numerals illustrate:

100 protecting the device; 110 a power supply unit; a second processing unit 120; 123 triode; 130 an arc signal acquisition unit; 140 a detection signal processing unit; 150 a leakage signal acquisition unit; 160 a first processing unit; 163MOS transistors; 170 execution unit; 171 thyristors; 173 capacitance; 175 trip coil; 176 freewheeling diode; 180 a fault indication unit; 183 first LED indicator light; 184 a second LED indicator; 190 sample resistance; 191 zero sequence current transformer; 192 switches; 111. 112, 122, 161, 162, 164, 172, 181, 182 resistance; 121. 165, 174 diodes.

Detailed Description

Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present disclosure have been illustrated in the accompanying drawings, it is to be understood that the present disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but rather, these embodiments are provided so that this disclosure will be more thorough and complete. It should be understood that the drawings and embodiments of the present disclosure are for illustration purposes only and are not intended to limit the scope of the present disclosure.

In describing embodiments of the present disclosure, the term "comprising" and its like should be taken to be open-ended, i.e., including, but not limited to. The term "based on" should be understood as "based at least in part on". The term "one embodiment" or "the embodiment" should be understood as "at least one embodiment". The term "some embodiments" should be understood as "at least some embodiments". Other explicit and implicit definitions are also possible below. The terms "first," "second," and the like, may refer to different or the same object. Other explicit and implicit definitions are also possible below.

As mentioned briefly above, in daily life, as the electrification degree is higher and higher, an electric fire occurs at the time of occurrence, and an arc is analyzed according to the cause of the fire to be the main cause of the electric fire. Along with the long-term work and the careless maintenance of many electric equipment, the aged circuit is visible everywhere, and not only can fire disaster be possibly caused, but also the danger of electric shock is brought to the daily use of people.

Arc faults are typically caused by wear, loosening or damage to equipment such as contactors, plugs, sockets, and the like, and by line breaks. When an abnormal discharge phenomenon occurs between the two conductors, sparks or flashes are generated, which may cause a fire, explosion or damage or even destroy the equipment and threaten personal safety.

On the other hand, the leakage fault is mainly caused by an abnormal flow path between the load portion and the ground due to insulation failure or equipment breakage. Leakage may occur when insulation ages, humidity is too high, or an external object pierces the insulation. Touch-sensitive injuries and life-threatening situations can result if a device with leakage is touched.

In consideration of safe power utilization, arc protection and leakage protection are required for a power supply line, electric equipment and the like. The purpose of arc protection is to disconnect the supply line in time when an arc fault occurs, thereby avoiding damage to the load due to overvoltage or overcurrent, while reducing the risk of causing a fire. The purpose of the leakage protection is to cut off the current loop of the power supply circuit in time when the leakage occurs in the equipment or the circuit, thereby avoiding the electric shock of human body and protecting the personal safety.

Arc faults and leakage faults are often caused by different causes and require protection by different methods. Arc faults and leakage faults have different characteristics and manifestations. Arc faults are typically manifested in the form of sparks, flashes, etc. that are visible or audible, while leakage faults involve abnormal flow paths that cause current to leak to ground. For conventional protectors, it is desirable to quickly and accurately identify an event that is occurring in order to respond to a potentially dangerous situation in time and prevent the situation from deteriorating. Due to the difference in the monitored parameters required for arc and earth leakage faults (e.g., analysis for sparks, flashing versus monitoring), conventional protectors are unable to detect and handle both types of faults at the same time. Accordingly, an arc protector for an arc fault and a leakage protector for a leakage fault are generally provided in a distribution box of a power supply line, respectively. The arc protector and the earth leakage protector are provided independently of each other, thereby causing a problem that the protector occupies a large space in the distribution box.

To address or at least partially address the above-described problems, or other potential problems, with conventional protector devices, embodiments of the present disclosure provide a solution for an arc and leakage fault protection device. In the protection device, a first processing unit recognizes a leakage fault signal in a power supply line according to a first detection signal in a leakage detection circuit, and sends an instruction to an execution unit to turn off a switch positioned in the power supply line. The second processing unit recognizes an arc fault signal in the power supply line according to a second detection signal in the arc detection circuit, and sends an instruction to the execution unit to turn off a switching component in the power supply line. The switching component can disconnect the power supply line, namely, disconnect the connection between the load and the power supply line according to the arc fault signal and/or the leakage fault signal detected by the protection device, so that the electricity utilization safety is ensured. The first processing unit sends the identified leakage fault signal to the second processing unit for recording and storing. The protection device in the embodiment of the disclosure can reliably detect whether arc faults exist in the power supply line or not, can detect whether leakage faults exist or not, and can cut off the power supply before danger occurs.

An exemplary structure and operation of the protection device 100 will be described below in conjunction with fig. 1-4. As shown in fig. 1, the protection device 100 according to the embodiment of the present disclosure generally includes a leakage detection circuit, an arc detection circuit, a first processing unit 160, a second processing unit 120, and an execution unit 170. In some embodiments, the protection device 100 may further include a detection signal processing unit 140, a fault indicating unit 180, and a power supply unit 110. For example, the detection signal processing unit 140 is coupled between the arc detection circuit and the second processing unit 120 for filtering and amplifying the second detection signal, and the second processing unit 120 recognizes an arc fault signal in the power supply line according to the signal filtered and amplified by the second detection signal and sends an instruction to the execution unit 170 to open the switch 192 located in the power supply line. The fault indication unit 180 is coupled to the second processing unit 120 for indicating signals of different fault types. The power supply unit 110 is coupled to the leakage signal acquisition unit 150 and the second processing unit 120 of the leakage detection circuit, and is used for providing a low voltage power required by the units to operate, such as an operating voltage required by the units, for example, 5V, 12V, 24V, etc. In an embodiment of the present disclosure, the leakage detection circuit, the second processing unit 120, and the execution unit 170 are coupled to the first processing unit 160 (may also be referred to as a leakage chip), and the first processing unit 160 identifies a leakage fault signal in the power supply line according to a first detection signal in the leakage detection circuit, and sends an instruction to the execution unit 170 to open the switch 192 located in the power supply line. The first processing unit 160 sends the identified leakage fault signal to the second processing unit 120 for recording and storing. The arc fault protection performed by the second unit has been described above and will not be described in detail here. The execution unit 170 is coupled to both the first processing unit 160 and the second processing unit 120 and drives the switch 192 in the power supply line on and off in response to at least one of the arc fault signal and the leakage fault signal.

The arc and leakage protection apparatus 100 according to the embodiment of the present disclosure performs arc protection and leakage protection using separate processing units, respectively, that is, the leakage operation is directly controlled by the first processing unit 160, and the arc fault is controlled using the second processing unit 120, so that it is possible to effectively prevent a series arc generated due to aging of a power supply line or poor contact of the power supply line, a parallel arc generated between the power supply line and the ground, while ensuring control reliability and independence. In this way, the accuracy, reliability, and real-time response capability of the protection device 100 can be improved, and the volume and footprint of the electrical box can be saved while manufacturing costs can be saved.

The specific architecture of the protection device 100 will be described below in conjunction with fig. 1. As shown in fig. 1, in the embodiment of the present disclosure, the leakage detection circuit includes a leakage signal acquisition unit 150 coupled to the phase line L and the neutral line N of the power supply line for acquiring a first detection signal of the power supply line, for example, an imbalance signal in the power supply line. The leakage signal acquisition unit 150 may be, for example, a zero sequence current transformer 191. When the power supply line works normally, i.e. no leakage or electric shock occurs, the vector sum of the currents of each phase on the primary side (also called the high-voltage side or the upstream side) of the zero-sequence current transformer 191 is equal to zero, i.e. I _N +I _L =0. At this time, the zero sequence current transformer 191 generates no induced electromotive force on the secondary side (which may also be referred to as a low voltage side or a downstream side), and thus an unbalanced signal existing in the power supply line is not acquired. In case of leakage or electric shock of the power supply line, the vector of each phase current of the phase line L and the neutral line N at the primary side of the zero sequence current transformer 191The sum of the amounts is not equal to zero, and the secondary side of the zero sequence current transformer 191 generates induced electromotive force at this time, so that an unbalanced signal in the power supply line can be obtained. It should be noted that the two-wire system shown in fig. 1 is merely exemplary, and the arc and leakage protection device 100 according to the embodiments of the present disclosure is also applicable to other types of power supply systems, such as three-phase four-phase systems, and the like. It should also be noted that references herein to "a first detection signal" and "a second detection signal" are merely for convenience of description to distinguish between the different detection signals.

Next, in the embodiment of the present disclosure, the leakage signal collection unit 150 is coupled to the first processing unit 160, and according to the first detection signal obtained as described above, the first processing unit 160 identifies whether there is a leakage fault signal in the power supply line, and if the first processing unit 160 identifies that there is a leakage fault signal according to the first detection signal, the first processing unit 160 sends an instruction to the execution unit 170 to open the switch 192 in the power supply line in response to the leakage fault signal. Otherwise, the execution unit 170 does not execute the opening of the switch 192 in the power supply line. In some embodiments, one of the leakage signal acquisition unit 150 or the first processing unit 160 may include a filtering processing module to filter the first detection signal. The first detection signal is filtered by the leakage signal acquisition unit 150 and then transmitted to the first processing unit 160 to identify whether the first detection signal is a leakage fault signal. For example, the first detection signal after the filtering process may be processed into an actual leakage value by the first processing unit 160. When the actual leakage value is greater than the preset leakage value, the first processing unit 160 sends an instruction to the execution unit 170 to open the switch 192 in the power supply line in response to the leakage fault signal. While the first processing unit 160 transmits the leakage fault signal to the second processing unit 120 for storing the recorded fault type. This function may be implemented by coupling a metal-oxide-semiconductor field effect transistor (which may also be referred to as a MOS transistor 163 or MOSFET) between the first processing unit 160 and the second processing unit 120. For example, referring to fig. 2, the gate of the N-type MOS transistor 163 is coupled to the first processing unit 160 (e.g., SCR terminal shown IN fig. 2) via a resistor 161, and the gate is connected to the virtual ground (e.g., GND terminal) of the circuit board via a resistor 162, the source is coupled to the second processing unit 120 (e.g., RCB IN terminal shown IN fig. 2), and the source is coupled to the power supply terminal (e.g., DVCC terminal shown IN fig. 2) via a resistor 164, and the drain is connected to the virtual ground (e.g., GND terminal) of the circuit board. When the first processing unit 160 recognizes the leakage fault signal, a high level signal is output at the SCR terminal, and the MOS tube 163 is turned on, so as to achieve the purpose of transmitting the leakage fault signal from the first processing unit 160 to the second processing unit 120. The purpose of the second processing unit 120 to record the leakage fault signal is to, after the line is powered off due to the leakage fault, drive the fault indication unit 180 to indicate the fault type by the second processing unit 120 when the power supply line is powered on again, so as to help the user to know that the reason of the previous power failure is due to the leakage fault. The fault indication unit 180 will be described in detail below.

As shown in fig. 1, in an embodiment of the present disclosure, the arc detection circuit includes an arc signal acquisition unit 130 coupled to the phase line L of the power supply line for acquiring a second detection signal in the power supply line. It should be appreciated that the two-wire system shown in fig. 1 is merely exemplary, and that the arc and leakage fault protection device 100 according to embodiments of the present disclosure may be adapted for use with other types of power supply systems as well. In some embodiments, the arc signal collecting unit 130 may include a sampling resistor 190, and may sample with a resistor made of constantan wire, which is not only low in cost but also saves the structural space of the protection device 100 greatly.

Next, in the embodiment of the present disclosure, a detection signal processing unit 140 is coupled between the arc signal acquisition unit 130 and the second processing unit 120 of the arc detection circuit, and the detection signal processing unit 140 may filter and amplify the second detection signal acquired by the arc signal acquisition unit 130 for the second processing unit 120 to recognize the arc fault signal. For example, after the second detection signal in the power supply line is collected by the arc signal collecting unit 130, the second detection signal is amplified by the detection signal processing unit 140 and then is processed in two paths, and one path of the second detection signal is processed by a passive low-pass filter (a resistor-capacitor filter or an RC filter may be adopted) and then is transmitted to the second processing unit 120, so as to obtain the current value and the low-frequency characteristic of the second detection signal. The other path is to separate the high frequency component from the current signal by an active high pass filter, and usually, the second detection signal carries a large amount of high frequency harmonic components, and then the second processing unit 120 analyzes according to the current magnitude, the low frequency characteristic, the high frequency characteristic and the voltage signal, and determines whether the current signal is an arc fault signal. If the fault signal is judged to belong to the arc fault signal, the second processing unit 120 is enabled to drive the execution unit 170 to perform action protection, the current fault type is recorded, and the fault indication unit 180 is driven to perform action to distinguish the fault types when the power supply line is powered next time.

In some embodiments, as mentioned previously, the arc and leakage protection device 100 further includes a fault indication unit 180. The fault indication unit 180 indicates different signals according to the difference between the arc fault signal and the leakage fault signal.

For example, the fault indication unit 180 may include an indication lamp. The indicator light may be an LED indicator light. The second processing unit 120 sends out different control signals to the indicator lamp according to the determined fault type, so that the indicator lamp indicates the fault type, for example, by at least one of a flashing frequency or by a flashing color. For example, in some embodiments, the indicator light may be a bi-color indicator light, and the earth leakage protection may be indicated by a red light flash, and the arc fault protection may be indicated by a yellow light flash. Referring to fig. 3, the first LED indicator 183 and the second LED indicator 184 are connected in parallel, one end of the first LED indicator 183 is grounded, and after the resistor 181 is connected in series with the other end of the second LED indicator 184 and the resistor 182 is connected in series with the other end of the first LED indicator 183, the other ends of the resistor 181 and the resistor 182 are connected to the second processing unit 120, so as to perform fault type indication under the control of the second processing unit 120. In this way, the type of fault or the cause of the fault that causes the switch 192 on the supply line to open or trip can be more intuitively indicated to the user or service person, thereby facilitating corresponding measures to be taken against faults occurring in the supply line. The types of faults in embodiments of the present disclosure may include, but are not limited to, the following types: string arc trip fault, parallel arc trip fault, leakage trip fault, overvoltage trip fault, and device internal detection fault.

In some embodiments, as mentioned previously, the arc and leakage protection device 100 further comprises a power supply unit 110. The power supply unit 110 may be coupled to at least one of the second processing unit 120 and the leakage signal acquisition unit 150 of the leakage detection circuit to provide the leakage signal acquisition unit 150 and the second processing unit 120 with a low voltage required for operation, such as an operation voltage required for these units, for example, 5V, 12V, 24V, etc. When the power supply line has an arc fault or a leakage fault, the first processing unit 160 or the second processing unit 120 drives the executing unit 170 to turn off the switch 192 of the power supply line, and at this time, the second processing unit 120 cannot obtain electric quantity from the power supply line, so that the power supply unit 110 supplies power to the second processing unit 120, so that the second processing unit 120 can continue to work normally. The power supply unit 110 may employ resistance-capacitance voltage reduction, so as to protect the leakage fault and the arc fault while satisfying the protection device 100, and also greatly reduce the cost of the protection device 100.

In order to more clearly understand the operation of the arc and leakage fault protection device 100 according to the embodiments of the present disclosure, the following description is made in detail with reference to fig. 1 and 4. The protection device 100 in the embodiments of the present disclosure may monitor the power supply line in real time. The following describes only the process of the first processing unit 160 and the second processing unit 120 driving the execution unit 170 to turn off the switch 192 in the power supply line with reference to fig. 4.

Any one of arc fault protection and leakage fault protection can drive the execution unit 170 to switch off the switch 192 of the power supply line, as shown in fig. 4, which is an example circuit of the protection device. In the example circuit shown in fig. 4, the cathode of the thyristor 171 is connected to, for example, a virtual ground (e.g., GND terminal) of the circuit board, the anode is connected to the trip coil 175 via the cathode of the diode 174, the anode is connected to the trip coil 175, and the control electrode (i.e., gate) of the thyristor is connected to the collector of the transistor 123 via the resistor 172, the control electrode of the thyristor is connected to the virtual ground (e.g., GND) of the circuit board via the capacitor 173, the collector of the transistor 123 is connected to the virtual ground (e.g., GND) of the circuit board via the resistor 111, the emitter of the transistor 123 is connected to the power supply line (e.g., DVCC terminal shown in fig. 4), the base of the transistor is connected to the anode of the diode 121 via the resistor 122, and the cathode of the diode 121 is connected to the second processing unit 120 (e.g., DIN 1 terminal shown in fig. 4). Resistor 112 is connected in parallel between the emitter and base of transistor 123. When the arc fault protection driving circuit operates, the second processing unit 120 pulls down the voltage of the diode 121, so that the triode 123 turns on to drive the thyristor 171 to operate, and the switch 192 for turning off the power supply line is performed.

In the drain fault protected drive circuit, the control electrode of the thyristor 171 is connected to the cathode of the diode 165, and the anode of the diode 165 is connected to the first processing unit 160 (e.g., SCR terminal shown in fig. 4). In this way, when a leakage fault occurs, the first processing unit 160 directly drives the thyristor 171 to operate via the diode 165, and turns off the switch 192 of the power supply line. Therefore, the driving circuits of arc fault protection and leakage fault protection are not affected, and can independently operate.

Referring to fig. 4, the execution unit 170 includes, for example, a trip coil 175 and a freewheel diode 176. If the first processing unit 160 sends a driving signal to the execution unit 170 according to the acquired leakage fault signal and drives the trip coil to open the switch 192 located on the power supply line, the leakage fault can be protected. Similarly, if the second processing unit 120 sends a driving signal to the execution unit 170 according to the obtained arc fault signal and drives the trip coil to open the switch 192 located on the power supply line, the arc fault can be protected.

The foregoing description of implementations of the present disclosure has been provided for illustrative purposes, is not exhaustive, and is not limited to the implementations disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various implementations described. The terminology used herein was chosen in order to best explain the principles of each implementation, the practical application, or the improvement of technology in the marketplace, or to enable others of ordinary skill in the art to understand each implementation disclosed herein.

Claims (10)

1. A protection device for arc and earth leakage faults, comprising:

the leakage detection circuit comprises a leakage signal acquisition unit (150) which is coupled to a phase line (L) and a neutral line (N) of a power supply line to acquire a first detection signal in the power supply line;

an arc detection circuit comprising an arc signal acquisition unit (130) coupled to the phase line (L) of the supply line to obtain a second detection signal in the supply line;

a first processing unit (160) coupled to the leakage detection circuit and configured to identify a leakage fault signal in the power supply line based on the first detection signal;

a second processing unit (120) coupled to the arc signal acquisition unit (130) and configured to identify an arc fault signal in the power supply line from the second detection signal; and

an execution unit (170) coupled to the first processing unit (160) and the second processing unit (120) and configured to open a switch located in the power supply line in response to at least one of the arc fault signal and the leakage fault signal.

2. The protection device of claim 1, further comprising:

a detection signal processing unit (140) coupled between the arc detection circuit and the second processing unit (120) and configured to filter and amplify the second detection signal for the second processing unit (120) to identify the arc fault signal.

3. The protection device according to claim 1, characterized in that the first processing unit (160) is coupled to the second processing unit (120) and is adapted to send the identified leakage fault signal to the second processing unit (120) for generating a storage signal for recording leakage faults.

4. The protection device according to claim 1, characterized in that the leakage signal acquisition unit (150) comprises a zero sequence current transformer (191).

5. The protection device according to claim 1, characterized in that the arc signal acquisition unit (130) comprises a sampling resistor (190).

6. The protection device of claim 1, further comprising:

a fault indication unit (180) is coupled to at least the second processing unit (120) and is configured to indicate different signals depending on the arc fault signal and the leakage fault signal.

7. The protection device according to claim 6, wherein the fault indication unit (180) comprises:

an indicator light that indicates the fault type by at least one of a flashing frequency or a flashing color.

8. The protection device of claim 1, further comprising:

and a power supply unit (110) coupled to the leakage signal acquisition unit (150) of the leakage detection circuit and the second processing unit (120).

9. The protection device of claim 1, further comprising:

-a thyristor (171), the control electrode of the thyristor (171) being coupled to the first processing unit (160) and the second processing unit (120), and the anode being coupled to the execution unit.

10. The protective apparatus of claim 9, further comprising:

-a transistor (123), the base of the transistor (123) being coupled to the second processing unit (120) and the collector being coupled to the control electrode of the thyristor (171).