Contactor

Abstract

The utility model provides a contactor, and relates to the technical field of low-voltage electric appliances. The contactor comprises a shell, a moving contact, a static contact and an arc baffle. The shell is provided with a first wiring port and an accommodating cavity. The moving contact is movably mounted in the accommodating cavity; the static contact is fixedly installed in the accommodating cavity, and one side of the static contact can be in contact with the moving contact. The wiring terminal is installed in the accommodating cavity, the wiring terminal is provided with a second wiring port, the second wiring port is communicated with the first wiring port and the accommodating cavity, and part of the static contact extends into the second wiring port to be electrically connected with the power supply line; the arc baffle is arranged in the shell and can cut off communication between the containing cavity and the first wiring port. According to the contactor provided by the invention, communication between the accommodating cavity and the first wiring port can be cut off through the arc baffle arranged in the accommodating cavity, so that the possibility that an electric arc is discharged out of the shell from the first wiring port is reduced, and the use safety and the use reliability of the contactor are ensured.

Description

Technical Field

[0001] This application relates to the field of low-voltage electrical technology, and more particularly to a contactor. Background Technology

[0002] A contactor is an automatic switching device that uses electromagnetic principles to control circuits. By controlling the energization state of the coil in the contactor, the contact state between the moving and stationary contacts in the contact mechanism can be changed, thereby protecting the circuit connected to the contactor.

[0003] Based on the existing contactor structure, an electric arc is generated between the moving and stationary contacts during the separation process. This arc can be ejected from the housing through the arc-dissipating channel inside the contactor, which may affect the personal safety of the operator and makes the contactor less safe to use. Utility Model Content

[0004] This application provides a contactor that, by using an arc-blocking plate disposed within the receiving cavity, isolates the connection between the receiving cavity and the first wiring port, thereby reducing the possibility of an electric arc exiting the housing from the first wiring port and ensuring the safety and reliability of the contactor in use.

[0005] In a first aspect, this application provides a contactor, comprising a housing, a moving contact, a stationary contact, and an arc-blocking plate. The housing has a first wiring port and a receiving cavity. The moving contact is movably installed into the receiving cavity. The stationary contact is fixedly installed into the receiving cavity, and one side of the stationary contact can contact the moving contact. A wiring terminal is installed into the receiving cavity, and the wiring terminal has a second wiring port, which connects the first wiring port and the receiving cavity. A portion of the stationary contact extends into the second wiring port for electrical connection with a power supply line. The arc-blocking plate is disposed within the housing, and the arc-blocking plate can isolate the connection between the receiving cavity and the first wiring port.

[0006] In this application example, the housing provides installation space for the stationary contact, terminal block, and arc baffle. The terminal block, in conjunction with part of the stationary contact, enables the electrical connection between the power supply line and the contactor. During the operation of the stationary contact, an electric arc is generated at the stationary contact. This arc can move within the receiving cavity. In this application example, the arc baffle is installed within the receiving cavity and can isolate the receiving cavity from the first terminal. Therefore, as the arc travels from the receiving cavity to the first terminal, it is blocked by the arc baffle, preventing the arc from exiting the housing from the first terminal. This reduces the possibility of the arc exiting the housing from the first terminal posing a risk to the operator's safety, ensuring the contactor's operational safety. Furthermore, the inability of the arc to exit the housing from the first terminal also reduces the possibility of the arc exiting the housing from the first terminal damaging other electrical appliances, thereby ensuring the contactor's operational reliability.

[0007] Furthermore, during the movement of the electric arc within the housing, the arc can easily burn the housing or other structures of the contactor, generating particulate matter. In this application example, since the arc-blocking plate separates the receiving cavity from the first wiring port, the particulate matter generated by the arc burning other structures during its movement cannot be discharged from the housing through the first wiring port, reducing the possibility of particulate matter discharged from the housing affecting other structural components, and at the same time reducing the impact of particulate matter on the atmospheric environment.

[0008] In some possible implementations, the terminal block includes a cooperating adjusting screw and a first terminal frame. The adjusting screw cooperates with the bottom wall of the first terminal frame to form a second terminal port. The adjusting screw cooperates with the side wall of the first terminal frame to form a cooperation gap. The cooperation gap connects the first terminal port and the receiving cavity. An arc-blocking plate is provided on the side of the first terminal frame away from the first terminal port, and the arc-blocking plate blocks the cooperation gap to isolate the connection between the receiving cavity and the first terminal port.

[0009] In this application example, the adjusting screw and the side wall of the first wiring frame cooperate to form a fitting gap, which connects the receiving cavity and the first wiring port. An arc-blocking plate is provided on the side of the first wiring frame away from the first wiring port. The arc-blocking plate blocks the fitting gap, which can isolate the connection between the receiving cavity and the first wiring port, so that the electric arc in the receiving cavity cannot be discharged from the housing at the first wiring port, thus ensuring the safety and reliability of the contactor.

[0010] In addition, the adjusting screw and the bottom wall of the first wiring frame cooperate to form a second wiring port. The stationary contact extends into the second wiring port. The adjusting screw, the first wiring frame and the stationary contact can cooperate to clamp the power supply line, which can realize the electrical connection between the power supply line and the stationary contact.

[0011] In some possible implementations, the stationary contact includes a stationary contact plate, and the terminal block includes a second terminal frame. The second terminal frame is movably connected to the first terminal frame, and the second terminal frame and the first terminal frame cooperate to form a second terminal port. The second terminal frame includes a baffle wall, which abuts against the stationary contact and blocks the mating gap to isolate the connection between the receiving cavity and the first terminal port. The baffle wall is an arc-blocking plate.

[0012] In this application example, the second wiring frame includes a baffle that can abut against the stationary contact and block the mating gap to isolate the connection between the receiving cavity and the first wiring port, thereby reducing the possibility of the electric arc in the receiving cavity being discharged from the housing at the first wiring port and ensuring the safety and reliability of the contactor.

[0013] Furthermore, in this example, the arc baffle is part of the second wiring frame. The second wiring frame is connected to the first wiring frame by adjusting screws, which makes the connection between the second wiring frame and the first wiring frame more reliable. This makes the reliability of the arc baffle in blocking the fit gap formed by the first wiring frame and the adjusting screw higher, further reducing the possibility of the electric arc in the cavity being discharged from the housing at the first wiring port, and ensuring the safety and reliability of the contactor.

[0014] In some possible implementations, the stationary contact includes a stationary contact plate, which includes a fixed section, a connecting section, and a wiring section. The fixed section is fixedly connected to the housing, the connecting section connects the fixed section and the wiring section, and the wiring section extends into the second wiring port and is electrically connected to the power supply line. An arc-blocking plate is located on the side of the terminal block opposite to the first wiring port. The arc-blocking plate can abut against the fixed section to isolate the receiving cavity from the first wiring port, or the arc-blocking plate can abut against the wiring section to isolate the receiving cavity from the first wiring port.

[0015] In this example, since the fixed section is fixedly connected to the housing and is part of the stationary contact plate, the stationary contact plate can be fixedly connected to the housing, ensuring the reliability of the connection between the stationary contact plate and the housing. The connecting section can connect the fixed section and the wiring section, and the wiring section can extend into the second wiring frame and be electrically connected to the power supply line.

[0016] Since both the fixed section and the wiring section are part of the stationary contact plate, whether the arc baffle plate abuts against the fixed section or the arc baffle plate abuts against the wiring section, the arc baffle plate can abut against the stationary contact plate, cutting off the connection between the receiving cavity and the first wiring port, reducing the possibility of the electric arc in the receiving cavity being discharged from the first wiring port, thereby ensuring the safety and reliability of the contactor in use.

[0017] In some possible implementations, the arc-blocking plate and the housing are an integral structure. Alternatively, the two opposite side walls of the housing are each provided with a slot, into which the arc-blocking plate is engaged.

[0018] In this application example, when the arc baffle and the housing are integrally formed, the connection reliability between the arc baffle and the housing is high, and the possibility of separation between the arc baffle and the housing is low, resulting in high reliability of the contactor. When the arc baffle is snapped onto the housing via a slot, if either the housing or the arc baffle is damaged during the use of the contactor, only the damaged one needs to be replaced, which can reduce the operating and maintenance costs of the contactor.

[0019] In some possible implementations, the arc-blocking plate is a ferromagnetic component.

[0020] In this example, by setting the arc-blocking plate to be a ferromagnetic component, the speed at which the arc leaves the moving contact and the stationary contact can be accelerated, thereby improving the arc extinguishing efficiency.

[0021] In some possible implementations, the receiving cavity includes a first receiving cavity, an arc-extinguishing cavity, and a second receiving cavity that are connected to each other. The second receiving cavity has a first wiring port on the side opposite to the arc-extinguishing cavity. The moving contact is located in the first receiving cavity. The stationary contact passes through the first receiving cavity, the arc-extinguishing cavity, and the second receiving cavity. The wiring terminal is located in the second receiving cavity. The arc-blocking plate is located in the second receiving cavity and / or the arc-extinguishing cavity.

[0022] In this example, since the moving contact is movably disposed in the first receiving cavity, and the stationary contact passes through the first receiving cavity, the arc-extinguishing cavity, and the second receiving cavity, the moving contact and the stationary contact can contact or separate within the first receiving cavity. During the separation of the moving contact and the stationary contact, an electric arc is generated between them. Due to the high temperature of the electric arc, the gas in the first arc-extinguishing cavity expands due to heat, making the gas pressure in the first receiving cavity greater than the gas pressure in the arc-extinguishing cavity and the second receiving cavity. The gas in the first receiving cavity moves towards the arc-extinguishing cavity and the second receiving cavity, which can accelerate the speed at which the electric arc leaves the first receiving cavity, thereby improving the arc-extinguishing efficiency of the contactor.

[0023] In some possible implementations, the top wall of the housing is provided with an adjustment hole through which the adjusting screw of the terminal can be adjusted. An arc-crossing gap is provided between the arc-blocking plate and the top wall of the housing, and the arc-crossing gap, the adjustment hole, and the arc-extinguishing cavity are connected.

[0024] In this example, an arc-passing gap is provided between the arc-blocking plate and the top wall of the housing. The arc-passing gap, the adjustment hole, and the arc-extinguishing cavity are connected. The second receiving cavity is connected to the arc-extinguishing cavity and the first receiving cavity to form an arc-dissipating channel. Therefore, the electric arc generated in the first receiving cavity can be discharged to the outside of the housing through the arc-extinguishing cavity, the arc-passing gap, and then through the adjustment hole, reducing the possibility of the electric arc accumulating in the first receiving cavity and the arc-extinguishing cavity, thereby damaging other structures of the contactor.

[0025] Furthermore, since the arc-blocking plate separates the receiving cavity from the first wiring port, preventing particulate matter from being discharged from the first wiring port, and because there is an arc-crossing gap between the arc-blocking plate and the top wall of the shell, the particulate matter generated by the arc burning the cavity wall and other structures within the arc-extinguishing cavity during its movement within the arc-extinguishing cavity may fall to the bottom of the second receiving cavity due to impact with the arc-blocking plate, or it may fall to the bottom of the second receiving cavity due to gravity during its movement. This reduces the possibility of particulate matter being discharged from the regulating hole to the outside of the shell, further reducing the possibility of particulate matter discharged from the shell affecting other structural components, and at the same time reducing the impact of particulate matter on the atmospheric environment.

[0026] In some possible implementations, the contactor also includes a partition plate, which, together with the arc-blocking plate, forms an arc-crossing gap. The partition plate is located in the second receiving cavity, or the partition plate is located in the arc-extinguishing cavity.

[0027] Compared to the method where the electric arc is directly discharged from the gap between the arc-blocking plate and the housing, in this example, by setting a partition and forming an arc-crossing gap with the arc-blocking plate, the electric arc is discharged from the arc-crossing gap to the outside of the housing. This extends the path of the electric arc to the outside of the housing, thereby reducing the temperature of the electric arc discharged to the outside of the housing, reducing the possibility of the electric arc affecting the personal safety of the operator, ensuring the safety of the contactor, and also reducing the possibility of the electric arc damaging other electrical appliances, thus ensuring the reliability of the contactor.

[0028] In some possible implementations, the stationary contact includes a stationary contact plate and a stationary contact point. The stationary contact point is connected to a first end of the stationary contact plate, which passes through a receiving cavity. The first end of the stationary contact plate can contact the moving contact. The second end of the stationary contact plate extends into a second wiring port and is electrically connected to the power supply line.

[0029] In this example, the first end of the stationary contact plate can contact the moving contact, which is movably mounted within the receiving cavity. Therefore, the moving contact and the stationary contact can contact or separate within the receiving cavity to protect the circuit. The second end of the stationary contact plate is provided to extend into the second wiring port, where the stationary contact plate is electrically connected to the power supply line, thereby achieving the electrical connection between the power supply line and the contactor. Attached Figure Description

[0030] Figure 1 This is a first-view structural schematic diagram of a contactor provided as an example of this application.

[0031] Figure 2 This is a structural schematic diagram of a contactor from a second perspective, provided as an example of this application.

[0032] Figure 3 for Figure 2 Sectional view along the middle AA.

[0033] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle.

[0034] Figure 5 This is a schematic diagram of the structure of a stationary contact provided as an example of this application.

[0035] Figure 6 This is a schematic diagram of a terminal block provided as an example of this application.

[0036] Explanation of reference numerals in the attached figures:

[0037] 100. Contactor; 110. Housing; 111. First wiring port; 112. Adjustment hole; 113. Receiving cavity; 1131. First receiving cavity; 1132. Arc extinguishing cavity; 1133. Second receiving cavity; 114. Partition; 120. Arc blocking plate; 130. Stationary contact; 131. Stationary contact plate; 1311. Fixed section; 1312. Connecting section; 1313. Wiring section; 132. Stationary contact; 140. Moving contact; 150. Wiring terminal; 151. Second wiring port; 152. Adjusting screw; 153. First wiring frame; 154. Second wiring frame; 1541. Baffle. Detailed Implementation

[0038] To make the purpose, technical solutions, and advantages of the examples in this application clearer, the technical solutions in the examples of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described examples are only a part of the examples in this application, not all of them. Based on the examples in this application, all other examples obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terms used herein in the description of the application are for the purpose of describing particular examples only and are not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the description, claims and drawings of this application are intended to cover non-exclusive inclusion.

[0040] In this document, the term "example" means that a particular feature, structure, or characteristic described in connection with the example can be included in at least one example of this application. The appearance of the phrase "example" in various places in the specification does not necessarily refer to the same example, nor is it a separate or alternative example mutually exclusive with other examples. It will be explicitly and implicitly understood by those skilled in the art that the examples described herein can be combined with other examples.

[0041] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists, A and B exist simultaneously, or B exists. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0042] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the contactor in this application.

[0043] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0044] In the description of this application, unless otherwise stated, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more (including two groups).

[0045] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection, such as a fixed connection, for example, a connection fixed by a partition, such as a connection fixed by screws, bolts, or other partitions; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0046] A contactor is an automatic switching device that uses electromagnetic principles to control circuits. By controlling the energization state of the coil in the contactor, the contact state between the moving and stationary contacts in the contact mechanism can be changed, thereby protecting the circuit connected to the contactor.

[0047] In the prior art, the contactor includes a terminal block, which specifically includes a terminal frame and an adjusting screw. Some stationary contacts can extend into the terminal frame and be electrically connected to the power supply line.

[0048] Based on existing technology, during the separation of the moving contact and the stationary contact, an electric arc will be generated between the moving contact and the stationary contact. The electric arc can be directly ejected from the housing through the gap between the wiring frame and the wiring screw, which may affect the personal safety of the operator and make the contactor less safe to use.

[0049] Based on the above, this application provides an example of a contactor.

[0050] To enable those skilled in the art to better understand the present application, the contactor provided in the example of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0051] For example, this application provides a contactor. Figure 1 This application provides a first-view structural schematic diagram of a contactor as an example. Figure 2 This application provides a schematic diagram of a contactor from a second perspective. Figure 3 for Figure 2 Sectional view along the middle AA. Figure 4 for Figure 3 A magnified view of a portion of point A in the middle.

[0052] Please refer to Figures 1-4 The contactor 100 includes a housing 110, a moving contact 140, a stationary contact 130, and an arc-blocking plate 120. The housing 110 has a first wiring port 111 and a receiving cavity 113. The moving contact 140 is movably installed into the receiving cavity 113. The stationary contact 130 is fixedly installed into the receiving cavity 113, and one side of the stationary contact 130 can contact the moving contact 140. A wiring terminal 150 is installed into the receiving cavity 113, and the wiring terminal 150 has a second wiring port 151, which connects the first wiring port 111 and the receiving cavity 113. A portion of the stationary contact 130 extends into the second wiring port 151 for electrical connection with a power supply line. The arc-blocking plate 120 is located within the housing 110 and can isolate the receiving cavity 113 from the first wiring port 111.

[0053] The housing 110 is made of insulating material, such as polyvinyl chloride, polycarbonate (also known as PC plastic), etc.

[0054] The housing 110, made of insulating material, can reduce the possibility of current escaping from the housing 110 to the outside, thereby ensuring the safety of the contactor 100.

[0055] The receiving cavity 113 may include only one receiving cavity 113, or it may include multiple interconnected sub-receiving cavities. This application example does not impose specific limitations on this.

[0056] The moving contact 140 is movably mounted within the receiving cavity 113. Exemplarily, the moving contact 140 can be connected to the receiving cavity 113 via an elastic element. The stationary contact 130 can be fixedly connected to the receiving cavity 113 by means of threaded connection, riveting, fusion connection, etc.

[0057] The contactor 100 also includes an electromagnetic mechanism. When the electromagnetic mechanism is energized, it generates a magnetic field, which drives the moving contact 140 to move, causing the moving contact 140 to contact the stationary contact 130 (in this application example, the moving contact 140 is a normally open moving contact, and the stationary contact 130 is a normally open stationary contact). When the electromagnetic mechanism is de-energized, the magnetic field generated by the electromagnetic mechanism disappears, the force acting on the moving contact 140 disappears, and the moving contact 140 separates from the stationary contact 130.

[0058] Terminal 150 can be formed by an adjusting screw and a wiring frame, forming a second wiring port 151. A portion of the stationary contact 130 extends into the second wiring port 151. In this case, the width of the arc-blocking plate 120 can be equal to the distance between the two side walls of the contactor 100, or the sum of the width of the arc-blocking plate 120 and the thickness of the two side walls of the wiring frame can equal the distance between the two side walls of the contactor 100. Alternatively, terminal 150 can be formed by an adjusting screw and two mating wiring frames, which are relatively movable. In this case, the two wiring frames form the second wiring port 151, and the stationary contact 130 extends into the second wiring port 151. In this case, the width of the arc-blocking plate 120 can be equal to the distance between the two side walls of the contactor 100, or the sum of the width of the arc-blocking plate 120 and the thickness of the two side walls of the wiring frame can equal the distance between the two side walls of the contactor 100.

[0059] There may be only one arc-blocking plate 120, or there may be multiple arc-blocking plates 120. This application example only describes one arc-blocking plate 120.

[0060] The arc-blocking plate 120 can be made of insulating materials such as polyvinyl chloride and polycarbonate, or ferromagnetic materials such as iron and iron-nickel alloys, or gas-generating materials such as polyamide-66, polyoxymethylene, and melamine. This application example does not impose specific limitations in this regard.

[0061] The arc baffle 120 may be part of the terminal block 150, or it may be a structure independent of the terminal block 150. This application example does not specifically limit this.

[0062] The arc baffle 120 can be fixedly installed inside the housing 110, and the arc baffle 120 can also move inside the housing 110, as long as the arc baffle 120 can isolate the receiving cavity 113 from the first wiring port 111, so that the receiving cavity 113 and the first wiring port 111 are not connected.

[0063] In this example, the housing 110 provides installation space for the stationary contact 130, the terminal block 150, and the arc baffle 120. The terminal block 150, in conjunction with a portion of the stationary contact 130, enables electrical connection between the power supply line and the contactor 100. During the operation of the stationary contact 130, an electric arc is generated at the stationary contact 130, and the arc can move within the receiving cavity 113. In this example, the arc baffle 120 is installed within the receiving cavity 113, and the arc baffle 120 can isolate the receiving cavity 113 from the first terminal block 111. Therefore, during the process of the arc traveling from the receiving cavity 113 to the first terminal block 111, the arc is blocked by the arc baffle 120, thereby preventing the arc from exiting the housing 110 from the first terminal block 111. This reduces the possibility that the arc exiting from the first terminal block 111 to the housing 110 may affect the personal safety of the operator, ensuring the safe use of the contactor 100. Furthermore, the arc cannot escape from the first terminal 111 to the housing 110, which can reduce the possibility of the arc escaping from the first terminal 111 to the housing 110 damaging other electrical appliances, thereby ensuring the reliability of the contactor 100.

[0064] Furthermore, during the movement of the electric arc within the housing 110, the arc can easily burn the housing 110 or other structures of the contactor 100, generating particulate matter. In this example, since the arc baffle 120 separates the receiving cavity 113 from the first wiring port 111, the particulate matter generated by the arc burning other structures during its movement cannot be discharged from the housing 110 through the first wiring port 111, reducing the possibility of particulate matter discharged from the housing 110 affecting other structural components, and also reducing the impact of particulate matter on the atmospheric environment.

[0065] Please refer to Figure 3 and Figure 4 The receiving cavity 113 includes a first receiving cavity 1131, an arc-extinguishing cavity 1132, and a second receiving cavity 1133 that are connected to each other. The second receiving cavity 1133 has a first wiring port 111 on the side opposite to the arc-extinguishing cavity 1132. A moving contact 140 is provided in the first receiving cavity 1131. A stationary contact 130 passes through the first receiving cavity 1131, the arc-extinguishing cavity 1132, and the second receiving cavity 1133. A wiring terminal 150 is provided in the second receiving cavity 1133. An arc-blocking plate 120 is provided in the second receiving cavity 1133 and / or the arc-extinguishing cavity 1132.

[0066] The housing 110 is provided with a receiving cavity 113, which includes a first receiving cavity 1131, an arc-extinguishing cavity 1132, and a second receiving cavity 1133 spaced apart, and the first receiving cavity 1131, the arc-extinguishing cavity 1132, and the second receiving cavity 1133 are connected. The housing 110 of the contactor 100 is an axisymmetric structure. Specifically, the housing 110 may include two symmetrically arranged first receiving cavities 1131, two second arc-extinguishing cavities 1132, and a second receiving cavity 1133. Since the structures of the two first receiving cavities 1131, the two second arc-extinguishing cavities 1132, and the second receiving cavity 1133 are similar, this application example only describes one first receiving cavity 1131, arc-extinguishing cavity 1132, and second arc-extinguishing cavity 1132 as an example.

[0067] The first receiving cavity 1131, the arc extinguishing cavity 1132, and the second receiving cavity 1133 are all sub-receiving cavities mentioned above.

[0068] An arc-extinguishing component is provided inside the receiving cavity 113. The arc-extinguishing component can separate the first receiving cavity 1131 and the arc-extinguishing cavity 1132. The arc-extinguishing component is provided with a through hole, through which the arc-extinguishing cavity 1132 and the first receiving cavity 1131 are connected.

[0069] A plate-like structure may be provided between the arc-extinguishing cavity 1132 and the second receiving cavity 1133. The plate-like structure is spaced apart from the arc-extinguishing component, and a gap is provided between the plate-like structure and the housing 110. The arc-extinguishing cavity 1132 communicates with the second receiving cavity 1133 through the gap.

[0070] The stationary contact 130 and the moving contact 140 cooperate to form a contact mechanism. Similar to the axisymmetric structure of the housing 110, the contact mechanism is also axisymmetric. The moving contact 140 is movably installed into the first receiving cavity 1131, and a moving contact point is provided at the end of the moving contact 140 near the stationary contact 130. In this application example, both ends of the moving contact 140 may be provided with moving contacts, one moving contact point is located in one first receiving cavity 1131, and the other moving contact point is located in the other first receiving cavity 1131. There may be two stationary contacts 130, which are symmetrically arranged in the receiving cavities 113. The stationary contact 130 includes a stationary contact point 132, which can contact the moving contact point. For the specific structure of the stationary contact 130, please refer to the relevant description below. This application example will not be described in detail here.

[0071] The second receiving cavity 1133 has a first wiring port 111 on the side opposite to the arc-extinguishing cavity 1132. The wiring terminal 150 is installed in the second receiving cavity 1133. The wiring terminal 150 includes a second wiring port 151. A part of the structure of the stationary contact 130 extends into the second wiring port 151, so that the power supply line can extend into the second wiring port 151 through the first wiring port 111 and be electrically connected to the stationary contact 130, thereby realizing the power supply line to the contactor 100.

[0072] The arc-blocking plate 120 can be installed in the second receiving cavity 1133, or it can be installed in the arc-extinguishing cavity 1132. Multiple arc-blocking plates 120 can be provided, with some in the second receiving cavity 1133 and others in the arc-extinguishing cavity 1132. This is as long as the arc-blocking plate 120 does not interfere with the electrical connection between the power supply line and the terminal block 150 and the stationary contact 130.

[0073] In this example, since the moving contact 140 is movably disposed in the first receiving cavity 1131, and the stationary contact 130 passes through the first receiving cavity 1131, the arc-extinguishing cavity 1132, and the second receiving cavity 1133, the moving contact 140 and the stationary contact 130 can contact or separate within the first receiving cavity 1131. During the separation of the moving contact 140 and the stationary contact 130, an electric arc is generated between them. Due to the high temperature of the electric arc, the gas in the first arc-extinguishing cavity 1132 expands due to heat, making the gas pressure in the first receiving cavity 1131 greater than the gas pressure in the arc-extinguishing cavity 1132 and the second receiving cavity 1133. The gas in the first receiving cavity 1131 moves towards the arc-extinguishing cavity 1132 and the second receiving cavity 1133, which can accelerate the speed at which the electric arc leaves the first receiving cavity 1131, thereby improving the arc-extinguishing efficiency of the contactor 100.

[0074] Based on the contactor 100 provided in the above example, the top wall of the housing 110 is provided with an adjustment hole 112, through which the adjustment screw 152 of the terminal 150 can be adjusted. An arc-crossing gap is provided between the arc-blocking plate 120 and the top wall of the housing 110, and the arc-crossing gap, the adjustment hole 112, and the arc-extinguishing cavity 1132 are connected.

[0075] Since the terminal block 150 is located in the second receiving cavity 1133, and the adjusting screw 152 is part of the terminal block 150, the adjusting hole 112 communicates with the second receiving cavity 1133.

[0076] The arc-blocking plate 120 can have an arc-crossing gap directly between it and the top wall of the housing 110. Alternatively, the top wall of the housing 110 can have a protrusion extending toward the arc-blocking plate 120, with the arc-blocking plate 120 and the protrusion engaging to form an arc-crossing gap. The protrusion and the arc-blocking plate 120 can be staggered or aligned; this application example does not impose specific limitations on this.

[0077] In this example, an arc-passing gap is provided between the arc-blocking plate 120 and the top wall of the housing 110. The arc-passing gap, the adjustment hole 112, and the arc-extinguishing cavity 1132 are connected. The second receiving cavity 1133 is connected to the arc-extinguishing cavity 1132 and the first receiving cavity 1131 to form an arc-dissipating channel. Therefore, the electric arc generated in the first receiving cavity 1131 can reach the second receiving cavity 1133 through the arc-extinguishing cavity 1132 and the arc-passing gap, and then be discharged to the outside of the housing 110 through the adjustment hole 112. This reduces the possibility of the electric arc accumulating in the first receiving cavity 1131 and the arc-extinguishing cavity 1132, thereby damaging other structures of the contactor 100.

[0078] Furthermore, since the arc-blocking plate 120 separates the receiving cavity 113 from the first wiring port 111, preventing particulate matter from being discharged from the first wiring port 111, and since there is an arc-crossing gap between the arc-blocking plate 120 and the top wall of the housing 110, particulate matter generated by the arc burning the cavity wall of the arc-extinguishing cavity 1132 and other structures within the arc-extinguishing cavity 1132 during its movement within the arc-extinguishing cavity 1132 may fall to the bottom of the second receiving cavity 1133 due to impact with the arc-blocking plate 120 during its movement towards the arc-crossing gap, or it may fall to the bottom of the second receiving cavity 1133 due to gravity during its movement. This reduces the possibility of particulate matter being discharged from the regulating hole 112 to the outside of the housing 110, further reducing the possibility of particulate matter discharged from the housing 110 affecting other structural components, and also reducing the impact of particulate matter on the atmospheric environment.

[0079] Based on the contactor 100 provided in the example above, please refer to... Figure 4 The contactor 100 also includes a partition 114, which is disposed in the receiving cavity 113 and forms an arc clearance with the arc-blocking plate 120.

[0080] The partition 114 can be integrally formed with the shell 110, or the partition 114 can be connected to the shell 110 by means of bonding, snap-fitting, or fusion bonding.

[0081] The partition 114 and the arc-blocking plate 120 can be arranged alternately, or they can be located on the same plane, as long as the partition 114 and the arc-blocking plate 120 can cooperate to form an arc-crossing gap. This application example does not impose specific restrictions on this.

[0082] Compared to the direct discharge of the electric arc from the gap between the arc-blocking plate 120 and the housing 110 to the housing 110, in this example, by setting a partition 114, and the partition 114 and the arc-blocking plate 120 forming an arc-passing gap, the electric arc in the receiving cavity 113 is discharged from the arc-passing gap and the adjusting hole 112 to the outside of the housing 110 via the path H. This can extend the path of the electric arc to the outside of the housing 110, thereby reducing the temperature of the electric arc discharged to the outside of the housing 110, reducing the possibility of the electric arc affecting the personal safety of the operator, ensuring the safety of the contactor 100, and also reducing the possibility of the electric arc damaging other electrical appliances, thereby ensuring the reliability of the contactor 100.

[0083] Figure 5 For a structural schematic diagram of a stationary contact provided as an example in this application, please refer to... Figure 4 and Figure 5 The stationary contact 130 mentioned in the above example includes a stationary contact plate 131 and a stationary contact point 132. The stationary contact point 132 is connected to the first end of the stationary contact plate 131. The stationary contact plate 131 passes through the receiving cavity 113, and the first end of the stationary contact plate 131 can contact the moving contact 140. The second end of the stationary contact plate 131 extends into the second wiring port 151 and is electrically connected to the power supply line.

[0084] The stationary contact 130 includes a stationary contact plate 131 and a stationary contact point 132. The stationary contact plate 131 passes through the first receiving cavity 1131, the arc extinguishing cavity 1132, and the second receiving cavity 1133. The stationary contact point 132 is located at one end of the stationary contact plate 131 near the moving contact 140 and is located in the first receiving cavity 1131. The stationary contact point 132 can contact the moving contact point, thereby realizing the contact between the moving contact 140 and the stationary contact 130.

[0085] The second end of the stationary contact plate 131 is located in the second receiving cavity 1133, and the second end of the stationary contact plate 131 can extend into the second wiring port 151, so that the power supply line can extend from the first wiring port 111 into the second wiring port 151 and be electrically connected to the stationary contact plate 131.

[0086] The stationary contact plate 131 can be a flat plate structure or a bent plate structure. The specific structure of the stationary contact plate 131 is not limited in the example of this application.

[0087] In this example, the first end of the stationary contact plate 131 can contact the moving contact 140, which is movably mounted within the receiving cavity 113. Therefore, the moving contact 140 and the stationary contact 130 can contact or separate within the receiving cavity 113 to protect the circuit. The second end of the stationary contact plate 131 is provided to extend into the second wiring port 151, where the stationary contact plate 131 is electrically connected to the power supply line, thereby achieving the electrical connection between the power supply line and the contactor 100.

[0088] Based on the contactor 100 provided in the example above, Figure 6 Please refer to the structural schematic diagram of a terminal block provided as an example of this application. Figure 3 , Figure 4 as well as Figure 6 The terminal block 150 includes a cooperating adjusting screw 152 and a first terminal frame 153. The adjusting screw 152 and the bottom wall of the first terminal frame 153 cooperate to form a second terminal port 151. The adjusting screw 152 and the side wall of the first terminal frame 153 cooperate to form a cooperation gap. The cooperation gap connects the first terminal port 111 and the receiving cavity 113. The arc baffle 120 is provided on the side of the first terminal frame 153 away from the first terminal port 111, and the arc baffle 120 blocks the cooperation gap to isolate the connection between the receiving cavity 113 and the first terminal port 111.

[0089] The first wiring frame 153 includes a top wall and a bottom wall that are arranged opposite to each other, and two side walls that are arranged opposite to each other. The top wall, one side wall, the bottom wall and the other side wall are connected end to end to form the first wiring frame 153. The space enclosed by the different walls of the first wiring frame 153 is connected to the first wiring port 111.

[0090] An adjusting screw 152 passes through the first terminal frame 153, and the adjusting screw 152 cooperates with the bottom wall of the first terminal frame 153 to form a second terminal opening 151. The adjusting screw 152 is movable relative to the bottom wall of the first terminal frame 153, that is, the size of the second terminal opening 151 can be adjusted. When the adjusting screw 152 moves towards the bottom wall of the second terminal frame 154, the size of the second terminal opening 151 decreases until the adjusting screw 152 directly or indirectly abuts against the stationary contact 130, at which point the adjusting screw 152 and the first terminal frame 153 can clamp the power supply wire. When the adjusting screw 152 moves away from the bottom wall of the second terminal frame 154, the size of the second terminal opening 151 increases, the effect of the adjusting screw 152 and the second terminal frame 154 on the power supply wire disappears, and the power supply wire can be detached from the second terminal opening 151, thus separating the power supply wire from the first terminal frame 153.

[0091] The adjusting screw 152 engages with the side wall of the first wiring frame 153 to form a mating gap. The mating gap can be connected to the second wiring port 151, or it can be isolated from the second wiring port 151. This application example does not impose specific limitations on this.

[0092] An arc-blocking plate 120 is disposed on the side of the first wiring frame 153 opposite to the first wiring port 111. The arc-blocking plate 120 can be integrally disposed with the first wiring frame 153. In this case, a through hole is provided between the arc-blocking plate 120 and the bottom wall of the first wiring frame 153 so that the stationary contact 130 can pass through the through hole to the second wiring port 151. After the stationary contact 130 passes through the through hole, the fitting gap between the stationary contact 130 and the through hole can be minimized to reduce the possibility that the electric arc will reach the second wiring port 151 through the through hole and then be discharged from the first wiring port 111 to the housing 110.

[0093] The arc baffle 120 can also be two independent structures from the first wiring frame 153. In this case, the arc baffle 120 can be installed in the receiving cavity 113. The arc baffle 120 can abut against the side of the stationary contact 130 facing the moving contact 140 to block the mating gap between the first wiring frame 153 and the adjusting screw 152, thereby cutting off the connection between the receiving cavity 113 and the first wiring port 111, so as to reduce the possibility that the electric arc reaches the second wiring port 151 through the perforation and then is discharged from the first wiring port 111 to the housing 110.

[0094] In this application example, the adjusting screw 152 and the side wall of the first wiring frame 153 cooperate to form a fitting gap. The fitting gap connects the receiving cavity 113 and the first wiring port 111. An arc-blocking plate 120 is provided on the side of the first wiring frame 153 away from the first wiring port 111. The arc-blocking plate 120 blocks the fitting gap and can isolate the connection between the receiving cavity 113 and the first wiring port 111, so that the electric arc in the receiving cavity 113 cannot be discharged from the housing 110 from the first wiring port 111, thus ensuring the safety and reliability of the contactor 100.

[0095] In addition, the adjusting screw 152 cooperates with the bottom wall of the first wiring frame 153 to form a second wiring port 151. The stationary contact 130 extends into the second wiring port 151. The adjusting screw 152, the first wiring frame 153 and the stationary contact 130 can cooperate to clamp the power supply line, so as to realize the electrical connection between the power supply line and the stationary contact 130.

[0096] Based on the contactor 100 provided in the example above, please refer to... Figure 6 The stationary contact 130 includes a stationary contact plate 131, and the terminal block 150 also includes a second wiring frame 154. The second wiring frame 154 is movably connected to the first wiring frame 153. The second wiring frame 154 and the first wiring frame 153 cooperate to form a second wiring port 151. The second wiring frame 154 includes a baffle 1541. The baffle 1541 abuts against the stationary contact 130 and blocks the mating gap to isolate the communication between the receiving cavity 113 and the first wiring port 111. The baffle 1541 is an arc-blocking plate 120.

[0097] The bottom wall of the first wiring frame 153 and the bottom wall of the second wiring frame 154 can be fitted together to form the second wiring port 151.

[0098] The structure of the first wiring frame 153 can be the same as that of the second wiring frame 154, or the structure of the first wiring frame 153 can be different from that of the second wiring frame 154.

[0099] For example, the second wiring frame 154 may have four side walls, three side walls, two side walls or one side wall, as long as the side walls in the second wiring frame 154 include at least one capable of blocking the mating gap to isolate the connection between the receiving cavity 113 and the first wiring port 111, that is, the second wiring frame 154 includes at least one baffle 1541.

[0100] The second end of the stationary contact plate 131 can extend into the second wiring port 151 formed by the cooperation of the first wiring frame 153 and the second wiring frame 154. The power supply line can be electrically connected between the stationary contact plate 131 and the second wiring frame 154, and the power supply line can also be electrically connected between the stationary contact plate 131 and the first wiring frame 153.

[0101] In this application example, the second wiring frame 154 includes a baffle 1541, which can abut against the stationary contact 130 and block the mating gap to isolate the connection between the receiving cavity 113 and the first wiring port 111, thereby reducing the possibility that the electric arc in the receiving cavity 113 will be discharged from the housing 110 from the first wiring port 111, and ensuring the safety and reliability of the contactor 100.

[0102] Furthermore, in this example, the arc baffle 120 is part of the second wiring frame 154. The second wiring frame 154 is connected to the first wiring frame 153 by adjusting screw 152, making the connection between the second wiring frame 154 and the first wiring frame 153 more reliable. This makes the reliability of the arc baffle 120 in blocking the mating gap formed by the first wiring frame 153 and the adjusting screw 152 higher, further reducing the possibility of the electric arc in the receiving cavity 113 being discharged from the housing 110 from the first wiring port 111, and ensuring the safety and reliability of the contactor 100.

[0103] Based on the contactor 100 provided in the example above, please refer to... Figure 3 , Figure 4 and Figure 5The stationary contact 130 includes a stationary contact plate 131, which includes a fixed section 1311, a connecting section 1312, and a wiring section 1313. The fixed section 1311 is fixedly connected to the housing 110, the connecting section 1312 connects the fixed section 1311 and the wiring section 1313, and the wiring section 1313 extends into the second wiring port 151 and is electrically connected to the power supply line. An arc-blocking plate 120 is disposed on the side of the terminal 150 opposite to the first wiring port 111. The arc-blocking plate 120 can abut against the fixed section 1311 to isolate the receiving cavity 113 from the first wiring port 111, or the arc-blocking plate 120 can abut against the wiring section 1313 to isolate the receiving cavity 113 from the first wiring port 111.

[0104] The fixed section 1311 and the wiring section 1313 can cooperate to form an angle. The fixed section 1311 and the wiring section 1313 are basically parallel. The fact that the fixed section 1311 and the wiring section 1313 are basically parallel can be understood as the angle formed by the fixed section 1311 and the wiring section 1313 being less than or equal to 5°.

[0105] The fixed section 1311 and the connecting section 1312 can be basically perpendicular, that is, the included angle formed by the fixed section 1311 and the connecting section 1312 is greater than or equal to 85° and less than or equal to 95°.

[0106] The fixed section 1311 can be installed in the first receiving cavity 1131 and the arc extinguishing cavity 1132, the connecting section 1312 can be installed in the arc extinguishing cavity 1132, and the wiring section 1313 can be installed in the arc extinguishing cavity 1132 and the second receiving cavity 1133.

[0107] The fixed section 1311 can be fixedly connected to the housing 110 by snap-fit, threaded connection, or other connection methods. The wiring section 1313 extends into the second wiring port 151 and can be electrically connected to the power supply line. The end of the wiring section 1313 opposite to the connecting section 1312 is a free end. Based on this, the wiring section 1313 can undergo a larger deformation range, allowing it to better cooperate with the wiring to clamp the power supply line and ensure the reliability of the connection between the contactor 100 and the power supply line.

[0108] The terminal block 150 is located in the second receiving cavity 1133, and the arc-blocking plate 120 is located on the side of the terminal block 150 away from the second wiring port 151. That is, the arc-blocking plate 120 can be located in the second receiving cavity 1133 or in the arc-extinguishing cavity 1132. In this application example, the location of the arc-blocking plate 120 is not specifically limited, as long as the arc-blocking plate 120 can isolate the connection between the receiving cavity 113 and the first wiring port 111.

[0109] When the arc-blocking plate 120 is located in the arc-extinguishing cavity 1132, since both a portion of the fixed section 1311 and a portion of the wiring section 1313 are located in the arc-extinguishing cavity 1132, the arc-blocking plate 120 can abut against the fixed section 1311, or the arc-blocking plate 120 can abut against the wiring section 1313. When the arc-blocking plate 120 is located in the second receiving cavity 1133, since a portion of the wiring section 1313 is located in the second receiving cavity 1133, the arc-blocking plate 120 can abut against the wiring section 1313.

[0110] The arc baffle 120 is located on the side of the terminal block 150 away from the first terminal 111. Compared with the arc baffle 120 being located on the side of the terminal block 150 closer to the first terminal 111, the contact area between the terminal block 1313 and the power supply line is larger, making the connection between the power supply line and the terminal block 150 more reliable.

[0111] In this example, since the fixed section 1311 is fixedly connected to the housing 110, and the fixed section 1311 is part of the stationary contact plate 131, the stationary contact plate 131 can be fixedly connected to the housing 110, ensuring the reliability of the connection between the stationary contact plate 131 and the housing 110. The connecting section 1312 can connect the fixed section 1311 and the wiring section 1313, and the wiring section 1313 can extend into the second wiring frame 154 and be electrically connected to the power supply line.

[0112] Since both the fixed section 1311 and the wiring section 1313 are part of the stationary contact plate 131, the arc-blocking plate 120 can abut against the fixed section 1311 or against the wiring section 1313, thus achieving the effect of the arc-blocking plate 120 abutting against the stationary contact plate 131, isolating the cavity 113 from the first wiring port 111, reducing the possibility of the electric arc in the cavity 113 being discharged from the first wiring port 111, and thus ensuring the safety and reliability of the contactor 100.

[0113] Based on the contactor 100 provided in the above example, the arc-blocking plate and the housing 110 are integrally formed. Alternatively, the two opposite side walls of the housing 110 are each provided with a slot, and the arc-blocking plate is engaged into the slot.

[0114] The arc-blocking plate can be integrally molded with the shell 110 through ordinary injection molding, two-color injection molding, or other methods.

[0115] When a slot is provided on the side wall of the housing 110, the end of the slot near the stationary contact 130 can be flush with the side of the stationary contact 130 facing the moving contact 140, or the end of the slot near the stationary contact 130 can be flush with the side of the stationary contact 130 away from the moving contact 140, so that when the arc baffle 120 is engaged with the slot, the arc baffle 120 can abut against the stationary contact 130.

[0116] In this application example, when the arc baffle plate and the housing 110 are integrally formed, the connection reliability between the arc baffle plate and the housing 110 is high, and the possibility of separation between the arc baffle plate and the housing 110 is low, resulting in high reliability of the contactor 100. When the arc baffle plate is snapped into the housing 110 via a slot, if either the housing 110 or the arc baffle plate is damaged during the use of the contactor 100, only the damaged one needs to be replaced, which can reduce the use and maintenance costs of the contactor 100.

[0117] Based on the contactor 100 provided in the above example, the arc baffle 120 is a ferromagnetic component.

[0118] The arc-blocking plate 120 can be made of ferromagnetic materials such as iron or iron-nickel alloy.

[0119] In this application example, by setting the arc-blocking plate 120 as a ferromagnetic component, the speed at which the arc leaves the moving contact 140 and the stationary contact 130 can be accelerated, thereby improving the arc extinguishing efficiency.

[0120] Finally, it should be noted that the above embodiments are merely specific implementations of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A contactor, characterized in that, include: The housing has a first wiring port and a receiving cavity; The moving contact is movably mounted into the receiving cavity; A stationary contact is fixedly installed inside the receiving cavity, and one side of the stationary contact can contact the moving contact; A terminal block is installed into the receiving cavity. The terminal block is provided with a second wiring port, which connects the first wiring port and the receiving cavity. Part of the stationary contact extends into the second wiring port to be electrically connected to the power supply line. An arc-blocking plate is disposed inside the housing, which isolates the accommodating cavity from the first wiring port.

2. The contactor according to claim 1, characterized in that, The terminal block includes a matching adjusting screw and a first wiring frame. The adjusting screw and the bottom wall of the first wiring frame cooperate to form a second wiring port. The adjusting screw and the side wall of the first wiring frame cooperate to form a fitting gap. The fitting gap connects the first wiring port and the receiving cavity. The arc-blocking plate is located on the side of the first wiring frame away from the first wiring port, and the arc-blocking plate blocks the fitting gap to isolate the connection between the receiving cavity and the first wiring port.

3. The contactor according to claim 2, characterized in that, The stationary contact includes a stationary contact plate; The terminal block further includes a second wiring frame, which is movably connected to the first wiring frame. The second wiring frame and the first wiring frame cooperate to form a second wiring port. The second wiring frame includes a baffle wall, which abuts against the stationary contact and blocks the mating gap to isolate the communication between the receiving cavity and the first wiring port. The baffle wall is the arc-blocking plate.

4. The contactor according to claim 1, characterized in that, The stationary contact includes a stationary contact plate, which includes a fixed section, a connecting section, and a wiring section. The fixed section is fixedly connected to the housing, the connecting section connects the fixed section and the wiring section, and the wiring section extends into the second wiring port and is electrically connected to the power supply line. The arc-blocking plate is located on the side of the terminal block away from the first terminal. The arc-blocking plate can abut against the fixed section to separate the receiving cavity from the first terminal. Alternatively, the arc-blocking plate can abut against the wiring section to separate the receiving cavity from the first terminal.

5. The contactor according to claim 4, characterized in that, The arc-blocking plate and the shell are an integral structure; or... The two opposite side walls of the housing are respectively provided with slots, and the arc-blocking plate is snapped into the slots.

6. The contactor according to any one of claims 1 to 5, characterized in that, The arc-blocking plate is a ferromagnetic component.

7. The contactor according to claim 1, characterized in that, The receiving cavity includes a first receiving cavity, an arc-extinguishing cavity, and a second receiving cavity that are connected to each other. The second receiving cavity has the first wiring port on the side opposite to the arc-extinguishing cavity. The moving contact is movably disposed in the first receiving cavity. The stationary contact passes through the first receiving cavity, the arc-extinguishing cavity, and the second receiving cavity. The wiring terminal is disposed in the second receiving cavity. The arc-blocking plate is disposed in the second receiving cavity and / or the arc-extinguishing cavity.

8. The contactor according to claim 7, characterized in that, The top wall of the housing is provided with an adjustment hole, through which the adjustment screw of the terminal can be adjusted; An arc-passing gap is provided between the arc-blocking plate and the top wall of the housing, and the arc-passing gap, the adjustment hole, and the arc-extinguishing cavity are connected.

9. The contactor according to claim 8, characterized in that, Also includes: A partition plate, in conjunction with the arc-blocking plate, forms the arc-crossing gap. The partition plate is located in the second receiving cavity, or the partition plate is located in the arc-extinguishing cavity.

10. The contactor according to claim 3 or 5, characterized in that, The stationary contact includes a stationary contact plate and a stationary contact point. The stationary contact point is connected to the first end of the stationary contact plate. The stationary contact plate passes through the receiving cavity. The first end of the stationary contact plate can contact the moving contact. The second end of the stationary contact plate extends into the second wiring port and is electrically connected to the power supply line.

Images