Outlet assembly having leakage current recovery function

Abstract

According to one aspect of the present invention, an outlet assembly which is connected to a secondary side of a three-phase three-wire transformer without a neutral line and on which an outlet is mounted is provided, the outlet assembly comprising: an outlet mounting body; a leakage current induction member provided in the outlet mounting body so as to induce leakage current; and a leakage current recovery unit for allowing the leakage current induced by the leakage current induction member to flow to the secondary side of the transformer.

Description

Assembly for outlet with leakage current recovery function

[0001] The present invention relates to an outlet assembly having a leakage current recovery function, and more particularly, to an outlet assembly having a leakage current recovery function that can prevent fire and electric shock accidents caused by leakage current by recovering leakage current even when leakage current occurs in an outlet, and that can operate normally even when the outlet is submerged, and that can be applied when there is no neutral wire in a three-phase, three-wire transformer secondary side.

[0002] Electric shock is a phenomenon in which the human body reacts when the leakage current flowing from the power source through the human body to the ground exceeds a certain level.

[0003] Typically, a leakage current of 15 mA or more causes convulsions, and a current of 50 mA or more can lead to death. The main cause of death is cardiac arrest, which occurs when the heart stops functioning due to the current flowing through the heart damaging nerves. The risk of electric shock is related to the body's resistance at the time of application, which is largely influenced by the condition of the skin.

[0004] Meanwhile, as is well known, an outlet is a device that electrically connects a power cable that supplies external commercial power to a plug equipped on a home appliance, etc., so that external power can be supplied to the home appliance. There is a built-in type that is installed embedded in the wall, and a separate type called a 'multi-tap' that is connected to another outlet so that more plugs can be connected.

[0005] An outlet is a device that electrically connects a power cable supplied with an external commercial power source and a plug of an electrical device, etc. If there is an overload or current leakage on the load side (electrical device side), leakage current may occur, causing an electrical fire or electric shock.

[0006] In fact, according to the National Fire Agency's statistical yearbook, electrical fires caused by leakage from electrical outlets account for approximately 25% of all fires.

[0007] In order to solve the problem caused by this leakage current, some outlets are equipped with leakage alarms that detect the leakage current and notify the user with a flashing lamp or buzzer when the standard is exceeded, and cut off the power output from the outlet when necessary. However, there are still many shortcomings in terms of actively and quickly responding to leakage current.

[0008] In particular, when a person comes into contact with the water or the conductive parts of a submerged electrical outlet, current will flow from the exposed conductors of the electrical equipment through the water and the person to the ground. This situation is extremely dangerous, as the human skin is prone to getting wet and contact resistance is extremely low.

[0009] A short circuit between power lines occurs when the insulation between the two wires decreases, increasing electrical conductivity. This causes a rapid current flow, potentially causing fires, short circuits, or other equipment damage. Air generally has very high insulating properties, so electrical insulation is maintained between the two wires through the air.

[0010] However, if a highly conductive fluid fills the space between the two lines due to flooding or other reasons, the current between the phases increases rapidly, causing a short circuit.

[0011] As a related technology, a prior art having a leakage current limiting device is described with reference to Fig. 1. Fig. 1 is a schematic diagram of a three-phase, four-wire interphase current and leakage current limiting device of an electrical facility according to the prior art.

[0012] As illustrated in FIG. 1, Korean Patent Publication No. 10-2023-0061805 discloses a three-phase, four-wire interphase current and leakage current limiting device for a submerged electrical facility, which is connected to a distribution line of the electrical facility and prevents electric shock in the event of submergence of the electrical facility or other electrical facilities located nearby by being electrically connected to the electrical facility, wherein one end is provided with a three-phase line terminal (12a, 12b, 12c) electrically connected to the three-phase lines (2a, 2b, 2c) of the distribution line, and the other end is provided with a phase line portion (22a, 22b, 22c) that is not surrounded by an insulator and is electrically connected to the electrical facility (200). One end is provided with a neutral line terminal (14a, 14b, 14c) electrically connected to the neutral line (4) of the distribution line, and the other end is provided with an internal neutral line (34a, 34b, 34c) electrically connected to an electrical facility (200) and a tubular line (26a, 26b, 26c) made of a conductive material that surrounds the phase line section (22a, 22b, 22c); One end is provided with a grounding line terminal (16a, 16b, 16c) electrically connected to a grounding line (6) of a distribution line, and the other end is electrically connected to an electrical facility (200), and is formed of an insulator and has a housing ground (28a, 28b, 28c) with a ground wire provided on the inner surface of the housing that surrounds the cylindrical line (26a, 26b, 26c) and an internal grounding line (36a, 36b, 36c) electrically connected to each other; A three-phase, four-wire interphase current and leakage current limiting device for a submerged electrical facility is disclosed, which can limit a sudden current increase of the electrical facility to prevent electric shock, and which includes an insulating tube (24a, 24b, 24c) which is respectively placed between the internal phase lines (32a, 32b, 32c) and the tubular lines (26a, 26b, 26c) and surrounds the internal phase lines (32a, 32b, 32c).

[0013] In this technology, the leakage current is limited by allowing the current flowing through the cylindrical line (26a, 26b, 26c) to flow to the ground via the internal ground line (36a, 36b, 36c) through the housing ground (28a, 28b, 28c) by combining the limited phase current and the current flowing from the electric load to the internal neutral line (34a, 34b, 34c).

[0014] However, since the housing ground is grounded to the ground of the third type, there is a resistance of approximately 100 ohms between the ground and the housing ground. Therefore, if a pedestrian touches a streetlight pole that has been grounded to the housing during flooding, there is a risk of electric shock.

[0015] Meanwhile, in the past, when there was no neutral wire on the secondary side of the transformer, only the third-class grounding work was performed on the load electrical equipment. Therefore, even if leakage current flows in the electrical equipment when touching the electrical equipment in normal times, the leakage current flows to the ground, so there is no risk of electric shock. However, when touching the electrical equipment during flooding, there is a problem that the leakage current that should flow to the ground flows to the human body, exposing one to the risk of electric shock.

[0016] Accordingly, the purpose of the present invention to solve the above-mentioned conventional problems is to provide an outlet assembly having a leakage current recovery function that can prevent fire and electric shock accidents caused by leakage current by recovering it to the power source even when leakage current occurs in the outlet, and that can enable the outlet to operate normally even when the outlet is submerged.

[0017] In addition, the present invention can be applied to a distribution line in which there is no neutral wire of a three-phase, three-wire system on the secondary side of a transformer, and another purpose of the present invention is to provide an assembly for an outlet having a leakage current recovery function that is provided in the form of a kit that fits the terminal port of the outlet so that it can be easily assembled and applied to an existing outlet.

[0018] The problems solved by the present invention are not limited to those mentioned above, and other problems not mentioned can be clearly understood by those skilled in the art from the description below.

[0019] According to one aspect of the present invention for achieving the above objects and other features of the present invention, there is provided an outlet assembly which is connected to the secondary side of a three-phase, three-wire transformer without a neutral line and on which an outlet is mounted, the outlet assembly comprising: an outlet mounting body; a leakage current inducing member provided in the outlet mounting body and configured to induce a leakage current; and a leakage current recovery unit configured to cause the leakage current induced by the leakage current inducing member to flow to the secondary side of the transformer.

[0020] According to the present invention, an assembly for an outlet having a leakage current recovery function provides the following effects.

[0021] First, the present invention has the effect of preventing fire accidents and electric shock accidents caused by leakage current by recovering it to the power source side and preventing it from being transmitted to the outside even when leakage current occurs in the outlet.

[0022] Second, the present invention has the effect of enabling the outlet to operate normally even when the outlet is submerged.

[0023] Third, the present invention has the effect of being universal in that it can be applied to not only single-phase but also three-phase three-wire distribution lines.

[0024] Fourth, the present invention not only can be provided as an integrated outlet, but also has the effect of being able to be easily assembled into an existing outlet to convert it into an outlet with a leakage current recovery function.

[0025] The effects of the present invention are not limited to those mentioned above, and other problems not mentioned can be clearly understood by those skilled in the art from the description below.

[0026] Figure 1 is a schematic diagram of a three-phase, four-wire interphase current and leakage current limiting device of an electrical facility according to the prior art.

[0027] Fig. 2 is a perspective view showing an assembly for an outlet having a leakage current recovery function according to the present invention.

[0028] Figure 3 is a perspective view showing an exploded view of an assembly for a receptacle having a leakage current recovery function according to the present invention.

[0029] FIG. 4 is a perspective view of an upper side of an outlet assembly having a leakage current recovery function according to the present invention with the cover body removed.

[0030] FIG. 5 is a perspective view of a lower side of an outlet assembly having a leakage current recovery function according to the present invention with the cover body removed.

[0031] FIG. 6 is a perspective view showing a mounting body of a socket mounting body included in an assembly for a socket having a leakage current recovery function according to the present invention.

[0032] Fig. 7 is a perspective view showing a leakage current induction member included in an assembly for an outlet having a leakage current recovery function according to the present invention.

[0033] FIG. 8 is a perspective view showing a leakage current induction member and a leakage current recovery unit included in an assembly for an outlet having a leakage current recovery function according to the present invention.

[0034] Figure 9 is a perspective view showing a state in which a receptacle is integrally assembled into an assembly for a receptacle having a leakage current recovery function according to the present invention.

[0035] FIG. 10 is a circuit diagram showing one embodiment of a leakage current recovery circuit of a leakage current recovery unit included in an outlet assembly having a leakage current recovery function according to the present invention.

[0036] FIG. 11 is a circuit diagram showing another embodiment of a leakage current recovery circuit of a leakage current recovery unit included in an outlet assembly having a leakage current recovery function according to the present invention.

[0037] FIG. 12 is a circuit diagram showing another embodiment of a leakage current recovery circuit of a leakage current recovery unit included in an assembly for an outlet having a leakage current recovery function according to the present invention.

[0038] Figures 13 to 15 are photographs of an assembly for an outlet having a leakage current recovery function according to the present invention.

[0039] Additional objects, features and advantages of the present invention can be more clearly understood from the following detailed description and accompanying drawings.

[0040] Before going into a detailed description of the present invention, it should be understood that the present invention can be modified in various ways and can have various embodiments, and that the examples described below and illustrated in the drawings are not intended to limit the present invention to specific embodiments, but include all modifications, equivalents, and substitutes included in the spirit and technical scope of the present invention.

[0041] In addition, when describing with reference to the attached drawings, identical components will be assigned the same reference numerals regardless of the drawing numbers, and redundant descriptions thereof will be omitted. When describing the present invention, if a detailed description of a related known technology is judged to unnecessarily obscure the gist of the present invention, such detailed description will be omitted.

[0042] Hereinafter, a detailed description will be given of an outlet assembly having a leakage current recovery function according to a preferred embodiment of the present invention and an outlet including the same with reference to the attached drawings.

[0043] FIG. 2 is a perspective view showing an assembly for an outlet having a leakage current recovery function according to the present invention, FIG. 3 is an exploded perspective view showing an assembly for an outlet having a leakage current recovery function according to the present invention, FIG. 4 is a perspective view seen from above with a cover body included in the assembly for an outlet having a leakage current recovery function according to the present invention removed, and FIG. 5 is a perspective view seen from below with a cover body included in the assembly for an outlet having a leakage current recovery function according to the present invention removed. FIG. 6 is a perspective view showing a mounting body of a mounting body for an outlet included in the assembly for an outlet having a leakage current recovery function according to the present invention, and FIG. 7 is a perspective view showing a leakage current inducing member included in the assembly for an outlet having a leakage current recovery function according to the present invention, and FIG. 8 is a perspective view showing a leakage current inducing member and a leakage current recovery unit included in the assembly for an outlet having a leakage current recovery function according to the present invention. FIG. 9 is a perspective view showing a state in which an outlet is integrally assembled in an outlet assembly having a leakage current recovery function according to the present invention, FIG. 10 is a circuit diagram showing one embodiment of a leakage current recovery circuit part of a leakage current recovery unit included in an outlet assembly having a leakage current recovery function according to the present invention, FIG. 11 is a circuit diagram showing another embodiment of a leakage current recovery circuit part of a leakage current recovery unit included in an outlet assembly having a leakage current recovery function according to the present invention, and FIG. 12 is a circuit diagram showing still another embodiment of a leakage current recovery circuit part of a leakage current recovery unit included in an outlet assembly having a leakage current recovery function according to the present invention. FIGS. 13 to 15 are photographs each showing an outlet assembly having a leakage current recovery function according to the present invention.

[0044] The assembly for an outlet having a leakage current recovery function according to the present invention largely includes an outlet mounting body (100), a leakage current induction member (200), and a leakage current recovery unit (300), as shown in FIGS. 2 to 15.

[0045] Specifically, the assembly for an outlet having a leakage current recovery function according to the present invention includes, as shown in FIGS. 2 to 15, an outlet mounting body (100) on which an outlet (10) is mounted while the plug connection portion (11) of the outlet (10) is exposed to the outside; a leakage current inducing member (200) provided in the outlet mounting body (100) and configured to induce leakage current generated in the outlet (10); and a leakage current recovery unit (300) provided on one side of the outlet mounting body (100) and configured to recover leakage current induced by the leakage current inducing member (200) so that the leakage current is not transmitted to the outside of the outlet (10).

[0046] The outlet mounting body (100) is a component in which an outlet (10) having a predetermined number of plug connection portions (11) is mounted, and is a component formed of an insulating material such as plastic.

[0047] Specifically, the outlet mounting body (100) includes a mounting body (110) of an upper and lower open type formed with a mounting portion in which the outlet (10) is mounted or fixed, and a cover body (120) detachably provided on the open upper and lower surfaces of the mounting body (110).

[0048] The mounting body (110) includes a body part (111) in the shape of a square frame with upper and lower open parts, and a mounting part (112) provided parallel to the inside of the body part (111) and to which the bracket (12) of the outlet (10) is fixed.

[0049] A leakage current recovery unit (300) is provided on one side of the body portion (111) of the mounting body (110).

[0050] The mounting portion (112) includes a “U”-shaped mounting portion (112a), and a fixing portion (112b) that extends from the upper end of the mounting portion (112a) to both sides and is integrally formed on the inner wall of the body portion (111).

[0051] In other words, the mounting part (112) is " " can be formed in the form of.

[0052] Here, the upper surface of the mounting portion (110) is formed to be positioned lower than the upper end of the body portion (111). In other words, the height between the upper surface of the mounting portion (112) and the upper end of the body portion (111) is preferably formed to be equal to or greater than the thickness of the upper side leakage current induction member (210) of the leakage current induction member (200) described below, taking into account the thickness of the upper side leakage current induction member (210).

[0053] Continuing, the cover body (120) detachably provided on the open upper and lower surfaces of the mounting body (110) includes an upper cover body (121) that detachably covers the open upper surface of the mounting body (110) and has an opening formed therein through which a plug of an electronic product or electrical equipment can be connected to a plug connection portion (11) of an outlet (10) mounted on the mounting body (110), and a lower cover body (122) that detachably covers the open lower surface of the mounting body (110).

[0054] Next, the leakage current induction member (200) is provided in the outlet mounting body (100) and is a component configured to induce leakage current generated in the outlet (10). It is a component made of an electrically conductive material such as metal, and induces leakage current generated in the outlet (10) so that it is recovered in the leakage current recovery section of the circuit module of the leakage current recovery unit (300).

[0055] Specifically, the leakage current induction member (200) may include a leakage current induction member (210) provided on the upper surface of the outlet (10) to induce leakage current occurring at the upper side or the outer side of the outlet (10), and a leakage current induction member (220) provided inside the outlet mounting body (110) to induce leakage current occurring at the lower side or the inner side of the outlet (10) and electrically connected to the upper side leakage current induction member (210).

[0056] The upper leakage current induction member (210) has one or more openings (201) formed so that a plug of an electronic product or electrical equipment can be connected to the plug connection portion (11) of the outlet (10) mounted on the mounting body (110), and is provided on the front (exposed surface) of the outlet (10).

[0057] For example, the upper leakage current induction member (210) includes a plate-shaped portion (211) having an opening (201) formed therein and provided on the front (exposed surface) of the outlet (10), an outlet coupling extension portion (212) that is bent downwardly and extended from the inside of the opening (201) on both ends and is fixed to a bracket (12) of the outlet (10), and one or more connection extension portions (first connection extension portions) (213) that are extended downwardly from the outside of one end of the plate-shaped portion (211) and are connected to the lower leakage current induction member (220) through a first connection terminal (320) of a leakage current recovery unit (300) to be described below.

[0058] The connection extension (213) can be connected to the first connection terminal (320) of the leakage current recovery unit (300) described below by extending downwards in two parallel directions in the drawing.

[0059] And the lower side leakage current induction member (220) includes a base part (221), and a connection extension part (second connection extension part) (222) that is bent and extended from the base part (221) and is connected to the connection extension part (213) of the upper side leakage current induction member (210) through the first connection terminal (320) of the leakage current recovery unit (300) to be described below.

[0060] The lower leakage current induction member (220) is included in the leakage current recovery unit (300) to be described in detail below and can be formed in a form that surrounds the connection terminal (second connection terminal portion) (330) that is electrically connected to the outlet (10) via a cable (wire).

[0061] The leakage current induction member (200) may be made of a metal material having excellent conductivity, such as copper, copper alloy, aluminum, or aluminum alloy.

[0062] Next, the leakage current recovery unit (300) is provided on one side of the outlet mounting body (100) and is a component configured to recover leakage current induced by the leakage current induction member (200) so that the leakage current is not transmitted to the outside of the outlet (10).

[0063] Specifically, the leakage current recovery unit (300) includes a circuit board portion (310) provided in a mounting portion provided on one side of the outlet mounting body (100), a first connection terminal portion (320) electrically connected to the circuit board portion (310) and to which a connection extension portion (213) of an upper-side leakage current induction member (210) of a leakage current induction member (200) and a connection extension portion (222) of a lower-side leakage current induction member (220) are connected, a second connection terminal portion (330) electrically connected to the outlet (10) via a wire (or cable), and a leakage current recovery circuit portion (340) provided in the circuit board portion (310) and configured to recover leakage current induced by the upper-side leakage current induction member (210) and / or the lower-side leakage current induction member (220) of the leakage current induction member (200) to the power source side. In the drawing, 350 is a cover plate covering the upper part of the side where the leakage current recovery unit (300) is provided, and 351 is a finishing cover detachably coupled to the mounting body (110) of the outlet mounting body (100) at the upper part of the cover plate.

[0064] The leakage current recovery circuit (340) can be configured to be applied to a three-phase, three-wire power source (power line) without a neutral wire. For example, the leakage current recovery circuit (340) can be applied to a three-phase, three-wire power source without a neutral wire on the secondary side of a transformer, which is the power source side.

[0065] In other words, one embodiment of the leakage current recovery circuit unit (340) can be applied to the power line of a Y-△ transformer (401) in which the primary three phases are Y-connected and the secondary three phases are △-connected, as shown in FIG. 11. In addition, as shown in FIG. 12, another embodiment of the leakage current recovery circuit unit (340) can be applied to the power line of a YY transformer (401) in which the primary three phases are Y-connected and the secondary three phases are Y-connected. In addition, although not shown, as another example, the transformer is a △-△ transformer in which the primary three phases are △-connected and the secondary three phases are △-connected, or a △-Y transformer in which the primary three phases are △-connected and the secondary three phases are Y-connected. Here, three-phase means that the voltages of each phase are vr=sinwt, vs=sin(wt-120°), and vt=sin(wt-240°).

[0066] The leakage current recovery circuit unit (340) includes, as an embodiment, a power display unit (341) that displays an operating state including the power operation state of the outlet and the normal operating state of the leakage current recovery unit (300), and a leakage current recovery unit (342) that recovers and processes leakage current induced by the leakage current induction member (200). In the present invention, the power display unit may be optionally included.

[0067] A power display unit (341) according to one embodiment of the present invention may include at least one LED that is forward-connected from the power supply secondary side toward the first connection terminal unit (320). A power display unit (341) according to another embodiment of the present invention may be arranged to include LEDs that are forward-connected in parallel between the three-phase (RST) three strands of the power supply secondary side and the first connection terminal unit (320). Specifically, an eleventh resistor (R11), a first LED (LED1), and a first diode (D1) in series connection are arranged between the power secondary side R line and the first connection terminal unit (320). A twelfth resistor (R12), a second LED (LED2), and a second diode (D2) in series connection are arranged between the power secondary side S line and the first connection terminal unit (320). And between the secondary side T line of the power supply and the first connection terminal part (320), the 13th resistor (R13), the third LED (LED3), and the third diode (D3) are arranged in series connection. That is, one side of the power display part (341) is connected to the R line, the S line, and the T line, respectively, and the other side of the power display part (341) is commonly connected to the first common node (CN1). Accordingly, when power is applied to the secondary side, the first to third LEDs (LED1, LED2, LED3) emit light.

[0068] Here, the 11th to 13th resistors (R11, R12, R13) and the 1st to 3rd diodes (D1, D2, D3) are responsible for protecting the 1st to 3rd LEDs (LED1, LED2, LED3), respectively.

[0069] Continuing, the leakage current recovery unit (342) includes passive elements (e.g., resistors or inductors) connected in parallel between the three phase (RST) strands of the secondary side of the transformer and the first connection terminal portion (320). Specifically, a 21st resistor (R21) is arranged between the R line of the secondary side of the transformer and the first connection terminal portion (320). A 22nd resistor (R22) is arranged between the S line of the secondary side of the transformer and the first connection terminal portion (320). And a 23rd resistor (R23) is arranged between the T line of the secondary side of the transformer and the first connection terminal portion (320). That is, one side of the 21st resistor (R21), the 22nd resistor (R22), and the 23rd resistor (R23) is connected to the R line, the S line, and the T line, respectively, and the other sides of the 21st resistor (R21), the 22nd resistor (R22), and the 23rd resistor (R23) are commonly connected to the second common node (CN2).

[0070] Here, the resistance values ​​(e.g., 100 ohms) of the 21st to 23rd resistors (R21, R22, R23) must be the same. When the three-phase voltage is in a balanced state, no current flows through the second common node (CN2) neither toward the load (e.g., a load connected to an outlet) nor toward the secondary side of the transformer.

[0071]

[0072] An assembly for an outlet having a leakage current recovery function according to one embodiment of the present invention operates as follows.

[0073] In normal conditions where the outlet is not submerged, the two wires of the outlet are electrically separated, so the leakage current recovery function according to the present invention is not performed.

[0074] However, in an emergency where the outlet is submerged, if the plug connection (11) of the outlet is submerged in water, the water becomes a conductor and electrically connects the plug connection (11) and the upper leakage current inducing member (210) or the plug connection (11) and the lower leakage current inducing member (220). Then, the upper leakage current inducing member (210) is electrically connected to the first connection terminal (320) of the leakage current recovery unit (300), and the lower leakage current inducing member (220) is electrically connected to the second connection terminal (330) of the leakage current recovery unit (300). Accordingly, according to one embodiment of the present invention, the leakage current leaking from the plug connection portion (11) of the outlet flows to the power supply secondary side (401) through the second common node (CN2) of the leakage current recovery portion (342) and along the 21st to 23rd resistors (R21, R22, R23) and is recovered.

[0075]

[0076] As another embodiment, when the 21st to 23rd inductors (L21, L22, L23) are used as passive components, the inductance values ​​of the 21st to 23rd inductors (L21, L22, L23) must be the same.

[0077] In the present invention, since the grounding of the outlet is a third-class grounding, a grounding resistance value of less than 100 ohms exists between the grounding wire and the ground.

[0078] According to the present invention, the leakage current induction member (200) and the leakage current recovery unit (342) are electrically connected through the first full-speed terminal unit (320), so that the resistance value between the leakage current induction member (200) and the second common node (CN2) of the leakage current recovery unit (342) can be maintained at 0.1 ohm or less. Accordingly, when leakage current occurs in the outlet, most of the leakage current flowing through the terminal block flows toward the leakage current recovery unit (342).

[0079] Meanwhile, the leakage current recovery circuit (340) can be configured to be applied to a single-phase power supply (power line) as shown in Fig. 12.

[0080] Here, the leakage current recovery unit (300) may further include a switch unit (360) that is provided on the circuit board unit (310) and can switch the connection to the secondary side active line (L) and neutral line (N) of the power supply connected to the leakage current recovery unit (342) when the leakage current recovery circuit unit (330) is of a single-phase type.

[0081] And the power indicator (341) can be configured to light up when power is applied and when the leakage current recovery unit (342) and the neutral line (N) are connected.

[0082] As described above, according to the present invention, the outlet assembly having a leakage current recovery function can prevent fire and electric shock accidents caused by leakage current by recovering it to the power source side and preventing it from being transmitted to the outside even when leakage current occurs in the outlet, and has the advantage of allowing the outlet to operate normally even when submerged.

[0083] In addition, the present invention can be applied to a three-phase, three-wire distribution line, and has the advantage of being able to be provided as an integrated outlet, and can be easily assembled into an existing outlet to convert it into an outlet with a leakage current recovery function.

[0084] The embodiments described in this specification and the attached drawings are merely illustrative of some of the technical concepts encompassed by the present invention. Therefore, the embodiments disclosed in this specification are intended to illustrate, rather than limit, the technical concepts of the present invention. Therefore, it is clear that the scope of the technical concepts of the present invention is not limited by these embodiments. All modifications and specific embodiments that can be easily inferred by those skilled in the art within the scope of the technical concepts contained in the specification and drawings of the present invention should be construed as being included within the scope of the rights of the present invention.

Claims

1. An assembly for a receptacle that is connected to the secondary side of a three-phase, three-wire transformer without a neutral wire and is equipped with a receptacle. Body with outlet; A leakage current induction member provided in the above outlet mounting body and configured to induce leakage current; and A leakage current recovery unit configured so that the leakage current induced by the leakage current induction member flows to the secondary side of the transformer. An assembly for a receptacle including:

2. In paragraph 1, The above outlet-mounted body The plug connection part of the above outlet is configured to be exposed to the outside and accommodated inside. Assembly for outlet.

3. In paragraph 2, The above outlet mounting body includes a mounting body having an upper and lower surface that is open and formed with a mounting portion on which the outlet is mounted, and a cover body that is detachably provided on the open upper and lower surfaces of the mounting body. The above leakage current recovery unit is characterized in that it is provided on one side of the mounting body. Assembly for outlet.

4. In paragraph 1, The above leakage current induction member An upper leakage current induction member provided on the upper side of the outlet provided in the above outlet mounting body; and It is characterized by including a lower side leakage current induction member connected to the upper side leakage current induction member and provided inside the outlet mounting body; Assembly for outlet.

5. In paragraph 4, The above upper leakage current induction member A plate-shaped portion formed with an opening and provided on the exposed surface of the outlet; A socket coupling extension extending from the inside of the opening of the above plate; and It is characterized by including a connecting extension extending from the outer side of one end of the above plate portion; Assembly for outlet.

6. In paragraph 4, The above lower leakage current induction member Base section; and characterized in that it includes a connecting extension extending from the base portion; Assembly for outlet.

7. In paragraph 1, The above leakage current recovery unit Circuit board section; A first connection terminal portion provided on the circuit board portion and electrically connected to the leakage current induction member; A second connection terminal electrically connected to the outlet; and It is characterized by including a leakage current recovery circuit part provided in the circuit board part and configured to recover the leakage current induced by the leakage current induction member; Assembly for outlet.

8. In paragraph 7, The above leakage current recovery circuit A first passive element placed between the secondary R line of a three-phase, three-wire power supply without a neutral line and a leakage current induction member; A second passive element placed between the S-line of the secondary side of a three-phase, three-wire power supply without a neutral line and a leakage current induction member; and A third passive element is characterized by including a third passive element placed between the secondary T-line of a three-phase, three-wire power supply without a neutral line and a leakage current induction member; Assembly for outlet.

9. In paragraph 8, The first to third passive elements are characterized in that they are resistors or inductors. Assembly for outlet.

10. In paragraph 8, The impedance values ​​of the first to third passive elements are characterized by being the same. Assembly for outlet.

11. In paragraph 7, The above leakage current recovery circuit It is characterized by further including a power display unit including an LED connected in the forward direction between the power secondary side and the leakage current induction member. Assembly for outlet.

12. In paragraph 11, The above power display unit, The 11th resistor and the 1st LED connected in series between the secondary R line of the above power supply and the leakage current induction member; A 12th resistor and a second LED connected in series between the S line of the secondary side of the power supply and the leakage current induction member; and It is characterized by including at least one of the 13th resistor and the 3rd LED in series connection between the secondary side T line of the power source and the leakage current induction member. Assembly for outlet.

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