KR100527032B1 - Receptacle - Google Patents

Abstract

A receptacle having two test buttons to detect ground faults and arc faults is disclosed. The receptacle includes an insulated enclosure. A cover is installed on top of the insulated enclosure. First and second test buttons are disposed inside the insulating enclosure. The lower ends of the first and second test buttons press a trip switch installed at the bottom of the insulated enclosure. Upper ends of the first and second test buttons are exposed through the cover. The first and second test buttons are returned to their original positions by springs. In addition, a reset button is disposed inside the insulating enclosure, and the top of the reset button is also exposed through the cover. Press the reset switch on the bottom of the insulated enclosure at the bottom of the reset button. The receptacle further includes an apparatus for selectively locking the reset button in association with the trip operation of the first and second test buttons.

Description

Receptacle {RECEPTACLE}

The present invention relates to a receptacle for use in a power distribution system.

Switchboards in certain areas, such as urban, industrial or commercial areas, typically use low voltage networks of 600 volts or less. In particular, cables in the network are buried underground and are generally designed to flow in at more than one point. Such cables can cause defects due to various causes, such as thermal degradation, aging, moisture or damage by animals such as mice.

Circuit breakers or receptacles are used to protect the network from such causes. In order to insulate the faulty cable and to minimize network disruption, a disconnect device is required across the cable that can disconnect the cable, such as a fuse. Cable disconnect devices are devices that can safely act on phase-to-phase faults, such as high voltage and low impedance faults.

On the other hand, in order to prevent fire or electric shock, at home, a circuit breaker and an earth leakage breaker are used. The circuit breaker is used for the purpose of protecting the electric wire. First, when the current exceeds the rated value while the load is in use, the current flowing inside the breaker becomes higher than normal to generate heat. This heat causes the internal bimetal to bend, thereby interrupting the operation of the electrical appliance. The second case is a short circuit between phases caused by a power tool or other metal object on the load side. In this case, since a high current is generated instantaneously, the inner magnet is operated before the bimetal is heated and the electric appliance is operated. Shut off the operation of electrical appliances. Such a high current generates a lot of magnetic fields, and accordingly the magnet inside the electric appliance is operated.

In the case of an earth leakage circuit breaker, the circuit breaker has a function of protecting the user by detecting a circuit and shutting off the power when the electric shock occurs while the user is using the electric device.

One type of ground fault breaker includes a ground fault protection receptacle having a high sensitivity ground fault detection function. The ground fault protection receptacle is disclosed in Korean Patent No. 087029 (Invention: Ground Fault Protection Receptacle). .

FIG. 1 shows a front view of the ground fault protection receptacle disclosed in the above registered patent. Referring to FIG. 1, the receptacle 10 has an insulating enclosure 15. Enclosure 15 includes a front cover 20, a back cover (not shown), and a base (not shown), each formed of an insulating material. The mounting yoke 30 in the form of a metal plate is coupled between the base constituting the enclosure 15 and the front cover 20. In addition, the ground terminals extend inwardly from the mounting yoke 30 into the base and enter and exit through an arc-shaped opening 25 among the openings 25. In addition, the ground terminal screw 35 is coupled with the side extension of the mounting yoke 30 for the connection of the external ground wire.

In this case, the center of the front cover 20 is provided with a reset button 40 for returning the operation of the receptacle 10 and a ground test button 45 for testing a ground fault.

However, although the conventional receptacle 10 having the above-described configuration can detect and test ground faults, mechanical and electrical stress due to insulation and wiring breakdown, overuse or overcurrent, connection defects, and excessive resistance to insulation and wiring There is a problem that an arc fault caused by mechanical damage or the like cannot be detected or tested.

In addition, the conventional receptacle also has a problem that the reset operation is very complicated after a defect test.

It is a first object of the present invention to provide a receptacle capable of detecting and testing arc defects that cannot be detected by conventional techniques.

It is a second object of the present invention to provide a receptacle which can be reset by simple operation after a defect test.

In order to achieve the above-mentioned first and second objects of the present invention, the receptacle according to the present invention includes an insulating enclosure. A cover is installed on top of the insulated enclosure. First and second test buttons are disposed inside the insulating enclosure. The lower ends of the first and second test buttons press a trip switch installed at the bottom of the insulated enclosure. Upper ends of the first and second test buttons are exposed through the cover. The first and second test buttons are returned to their original positions by springs. In addition, a reset button is disposed inside the insulating enclosure, and the top of the reset button is also exposed through the cover. Press the reset switch on the bottom of the insulated enclosure at the bottom of the reset button. The receptacle further includes an apparatus for selectively locking the reset button in association with the trip operation of the first and second test buttons.

According to the receptacle according to the present invention, by providing separate first and second test buttons, it is possible to provide a ground fault, mechanical and electrical stress due to insulation and wiring breakdown, overuse or overcurrent, connection defect, and excessive insulation and wiring. It is possible to detect and test arc defects generated by mechanical damage or the like that cannot be detected by conventional techniques. In addition, the locking of the reset button is released in response to the trip operation by the first and second test buttons, thereby facilitating the initialization of the receptacle by the reset button.

Hereinafter, a receptacle according to exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Example 1

2 is a plan view of a receptacle according to Embodiment 1 of the present invention. Referring to FIG. 2, the receptacle 100 is disposed inside the insulation enclosure 105, the cover 110 coupled to the upper portion of the insulation enclosure 105, and the insulation enclosure 105 so that the top is exposed through the cover 110. First and second test buttons 121 and 122, and reset buttons 115 disposed inside the insulating enclosure 105 and exposed at the top thereof through the cover 110. The first and second test buttons 121 and 122 press the trip switch 175 (see FIG. 3) disposed on the bottom of the insulating enclosure 105, and the reset button 115 is disposed on the bottom of the insulating enclosure 105. The reset switch 187 (see FIGS. 6 and 7) is pressed.

The cover 110 has upper ends of the first and second test buttons 121 and 122 exposed to the outside, respectively, so that the first and second button holes 131 and 132 can be operated by the user so as to operate the first and second test buttons 121 and 122. Is formed. Meanwhile, the reset button 115 is positioned between the first and second test buttons 121 and 122. The reset button 115 is used to return the circuit again when a fault such as a short circuit occurs and the circuit is cut off. In addition, the cover 110 is formed with a connector 125 corresponding to the three-phase outlet, to accommodate the three-phase outlet to be connected to the circuit inside the insulating enclosure (105).

The yoke 135 is coupled between the insulating enclosure 105 and the cover 110. Coupling holes 140 are formed at one side and the other side of the yoke 135 so that the receptacle 100 can be easily fixed by using a bolt, a screw, or the like at an inner wall of the building to be wired.

The first test button 121 serves as an arc test button for detecting and testing an arc defect, and the second test button 122 serves as a ground test button for detecting and testing a ground defect.

3 is a cross-sectional view taken along line III-III of FIG. 2. 2 and 3, first and second button receiving parts 151 and 152 for receiving the first and second test buttons 121 and 122 are formed at both sides of the insulating enclosure 105. That is, the first and second test buttons 121 and 122 are inserted into the first and second button holes 131 and 132 formed in the cover 110, and the first and second button receiving parts 151 and 152 formed in the insulating enclosure 105. Through) is mounted inside the receptacle 100. In this case, the first and second test buttons 121 and 122 are formed in a shape corresponding to the inner wall of the cover 110 and the insulating enclosure 105, and extend to the trip switch 175 below the insulating enclosure 105.

4 is an enlarged perspective view illustrating the first and second test buttons of FIG. 2. 2 to 4, the first and second test buttons 121 and 122 have a symmetrical shape, and a pressing switch 145 and a trip switch under the insulating enclosure 105 coupled to the cover 110. And a contact portion 155 contacting the contact portion 175, and a connection portion 160 connecting the pressing portion 145 and the contact portion 155.

In this case, first and second spring grooves 171 and 172 are formed at one side of the connection portion 160 of the first and second test buttons 121 and 122, respectively. Both sides of the first spring 165 are coupled to the first and second spring grooves 171 and 172, respectively, to impart restoring force to the first and second test buttons 121 and 122, respectively. That is, when the user presses the first or second test buttons 121 and 122 downward to test an arc or ground fault, the contact portions 155 of the first and second test buttons 121 and 122 are lower than the insulating enclosure 105. By contacting the trip switch 175, the first and second test buttons 121 and 122 are returned to their original positions by the elastic force of the first spring 165 after the arc or ground fault is tested. In this case, in order to easily mount the spring 165 in the narrow space inside the insulating enclosure 105, the spring 165 is preferably a leaf spring.

In the first embodiment, although the first and second test buttons 121 and 122 are shown to extend to the lower portion of the insulating enclosure 105 in correspondence with the inner wall of the cover 110 and the insulating enclosure 105, the receptacle ( The first and second test buttons 121 and 122 may be formed in various shapes so that the first and second test buttons 121 and 122 may be mounted in correspondence to design conditions of circuits and components coupled to the inside of the apparatus 100.

Meanwhile, the reset button and the locking device are shown in detail in FIG. 5, which is a cross-sectional view taken along the line VV of FIG. 2. Referring to FIG. 5, the reset button 115 is disposed in the insulating enclosure 105 so as to be elevated in the longitudinal direction. An upper end of the reset button 115 is exposed upward through the cover 110, and a lower end of the reset button 115 is disposed adjacent to the reset switch 187 (see FIGS. 6 and 7). The reset button 115 is elastically supported upward by the second spring 117.

6 is a view showing only the reset button and the locking device, Figure 7 is a perspective view showing in detail the pressing boss of the reset button. 6 and 7, the reset button 115 is supported to be liftable by the reset guide 180. That is, the reset button 115 is fitted to the reset guide 180 so as to be movable. On the other hand, the reset guide 180 has a locking passage 181 formed through the horizontal direction in the middle. A locking groove 116 is formed on an outer circumferential surface of the reset button 115 positioned in the locking passage 181. The reset guide 180 has a pressing boss 185 integrally formed on the side. The lower end of the press boss 185 is disposed adjacent to the reset switch 187.

The reset button 115 is selectively locked according to the operation of the first and second test buttons 121 and 122, and a locking device for this is shown in detail in FIGS. 5 to 7. 5 to 7, the locking device includes a solenoid 193 that operates by receiving a signal from the trip switch 175. That is, the solenoid 193 is magnetized by the trip switch 175 being pressed by the first and second test buttons 121 and 122.

A plunger 190 reciprocating along the horizontal direction is disposed along the horizontal direction on the side of the reset button 115 by the selective magnetization of the solenoid 193. That is, the plunger 190 moves in the direction opposite to the reset button 115 by the magnetization of the solenoid 193. The third spring 192 for returning the plunger 190 moved in the above direction to its original position elastically supports the plunger 190 in the direction of the reset button 115.

A ratchet 194 that selectively locks the reset button 115 is connected to the plunger 190 via a bracket 191. The ratchet 194 is disposed to be movable in the horizontal direction in the locking passage 181 of the reset guide 180. Since the ratchet 194 is selectively caught by the locking groove 116 of the reset button 115, the lifting operation of the reset button 115 is selectively locked.

On the other hand, the receptacle according to the present invention has a plurality of LED lamps so that the user can identify each button position and the current state of the receptacle at a glance. 8 is a perspective view showing an arrangement position of the LED lamp having the same function as described above.

With reference to FIGS. 2 and 8, two defect indicator lamps 106, 107 are disposed in the insulating enclosure 105 and exposed through the cover 110. For example, the defect indicator lamps 106 and 107 emit green when the receptacle is normal, and emit red when the receptacle has a defect. Therefore, when the user looks at the colors of the defect indicator lamps 106 and 107, it is possible to immediately recognize whether the receptacle is defective.

In addition, a test lamp 108 is installed on the bottom surface of the insulation enclosure 105 which is the lower portion of the first and second test buttons 121 and 122. The test lamp 108 emits green when the test buttons 121 and 122 are not operated, for example, and then emits red by pressing the test buttons 121 and 122. In particular, the first and second test buttons 121 and 122 may be transparent materials such as acrylic, which transmits light emitted from the test lamp 108, so that the user may accurately recognize the positions of the test buttons 121 and 122 even at night. Is preferably.

In addition, the reset lamp 109 is provided on the bottom surface of the insulating enclosure 105 which is the lower portion of the reset button 115. The reset lamp 109 also functions as the test lamp 108, and thus, repeated description thereof will be omitted. In addition, like the first and second test buttons 121 and 122, the reset button 115 is preferably made of a transparent material.

Hereinafter, a process in which the receptacle according to the first embodiment configured as described above performs a test operation and a reset operation will be described in detail.

When the defect indicator lamps 106 and 107 that emit green color are turned red due to a defect in the receptacle, the user performs a test operation and a tripping operation. On the other hand, it is well known that the tripping operation may be automatically performed by an electrical signal from the defect indicator lamps 106 and 107 in addition to forcing the user to press the test buttons 121 and 122. Here, an example of a user performing a tripping operation will be described. When the user presses the first or second test buttons 121 and 122, the first or second test buttons 121 and 122 press the trip switch 175 disposed on the bottom surface of the insulating enclosure 105, thereby performing a tripping operation. do. At this time, the green test lamp 108 emits red color, and the red light is transmitted through the first and second test buttons 121 and 122 made of a transparent material, so that the user may check the first and second test buttons ( The operation of 121, 122 can be immediately confirmed.

At this time, when the trip switch 175 is pressed, an electrical signal is transmitted from the trip switch 175 to the solenoid 193, and the solenoid 193 is magnetized. The magnetization of the solenoid 193 causes the plunger 190 to move in the opposite direction of the reset button 115 while compressing the third spring 192. Therefore, since the ratchet 194 which is caught in the locking groove 116 is moved in the same direction as the plunger 190, the reset button 115 is moved upward by the second spring 117.

When the test operation is completed and the force held by the first or second test buttons 121 and 122 is removed, the first and second test buttons 121 and 122 are returned to their original positions by the first spring 165. At the same time, since the solenoid 193 loses its magnetism, the plunger 190 is moved back to the reset button 115 by the third spring 192. At this time, the ratchet 194 is also elastically supported in the reset button 115 direction.

Subsequently, in order to reset, when the reset button 115 is pressed, the reset button 115 descends and the ratchet 194 that is being elastically supported enters the locking groove 116. Therefore, the reset button 115 is lowered together with the ratchet 194, thereby lowering the reset guide 180 as well. Therefore, the push boss 185 integrated in the reset guide 180 descends to press the reset switch 187. In this case, the reset lamp 109 that emits red color is switched to green by the trip operation, and the green light is transmitted through the reset button 115 made of a transparent material, so that the user may determine whether the reset button 115 is operated. You can check immediately. Here, the reset lamp 109 may be emitted by the pressing operation of the reset button 115, but may be automatically emitted by an electrical reset signal from the outside, for example, an electrical signal from the test lamp 108. There will be.

Example 2

9 shows a plan view of a receptacle according to Embodiment 2 of the present invention. Referring to FIG. 9, the receptacle 200 according to the second embodiment is disposed inside the insulation enclosure 205, the cover 210 coupled to the upper portion of the insulation enclosure 205, and the insulation enclosure 205 so that the top is covered. First and second test buttons 221 and 222 exposed through the 210, and the reset button 215 disposed inside the insulating enclosure 205 and exposed through the cover 210.

In this case, upper ends of the first and second test buttons 221 and 222 are exposed to the outside of the cover 210 so that the user can operate the first and second test buttons 221 and 222, respectively. 231,232 are formed. In addition, the cover 210 has a connector 225 corresponding to the three-phase outlet is formed to accommodate the three-phase outlet to be connected to the circuit inside the insulating enclosure 205.

A yoke 235 is coupled between the insulating enclosure 205 and the cover 210. In this case, coupling holes 240 are formed at both sides of the yoke 235 so that the receptacle 200 can be easily fixed by using a bolt, a screw, or the like at an inner wall of the building to be wired. In addition, the defect indicator lamps 206 and 207 are exposed through the cover 210.

10 is a cross-sectional view taken along the line VII-VII of FIG. 9. 9 and 10, first and second button receiving parts 251 and 252 may be formed at both sides of the insulating enclosure 205 to accommodate the first and second test buttons 221 and 222. That is, the first and second test buttons 221 and 222 are inserted into the first and second button holes 231 and 232 formed in the cover 210 and the first and second button receiving parts 251 and 252 formed in the insulating enclosure 205. It is disposed in the receptacle 200 through). In this case, the first and second test buttons 221 and 222 are formed in a shape corresponding to the inner wall of the cover 210 and the insulating enclosure 205 and extend to the lower portion of the insulating enclosure 205. In this case, the first and second tap buttons 281 and 282 are respectively coupled between the first and second test buttons 221 and 222 and the trip switch 275 under the insulating enclosure 205.

FIG. 11 is an enlarged perspective view of the first and second test buttons in the receptacle of FIG. 9. 9 to 11, the first and second test buttons 221 and 222 have shapes that are symmetrical with each other, and the push part 245 and the trip switch under the insulating enclosure 205 coupled to the cover 210. Contact portion 255 in contact with 275, and connecting portion 260 connecting the pressing portion 245 and the contact portion 255.

In this case, first and second spring grooves 271 and 272 are formed at one side of the connection part 260 of the first and second test buttons 221 and 222, respectively. Both sides of the first spring 265 are coupled to the first and second spring grooves 271 and 272, respectively, to impart restoring force to the first and second test buttons 221 and 222. That is, when the user presses the first or second test buttons 221 and 222 downward to test an arc or ground fault, the contact portions 255 of the first and second test buttons 221 and 222 are lower than the insulating enclosure 205. By operating the first and second tap buttons 281 and 282 between the trip switch 275 and the contact 255 of the first and second springs, respectively, by the elastic force of the first spring 265 after testing the arc or ground fault. 2 The test buttons 221 and 222 return to their original positions. In this case, in order to easily mount the first spring 265 in a narrow space inside the insulation enclosure 205, the first spring 265 is preferably a leaf spring.

As described above, according to the receptacle according to the present invention, by providing separate first and second test buttons, mechanical and electrical stress due to insulation and wiring breakdown, overuse or overcurrent, connection failure and insulation and wiring, including grounding fault It can detect and test arc faults that could not be detected by ground-coupled protection receptacles, for example, due to excessive mechanical damage to the device.

In addition, the first and second test buttons for testing ground and arc faults operate separate first and second tap buttons mounted to the first and second test buttons, respectively, without shorting the direct circuit. As a result, tests can be performed more safely.

Furthermore, the first and second test buttons can be integrally formed extending from the top to the bottom of the receptacle to reduce the size of the receptacle, so that it can be easily installed during use.

In particular, there is an advantage that the reset operation is simply performed by the reset button and the locking device.

In the above, the receptacles according to the preferred embodiments of the present invention have been described and illustrated, but the present invention is not limited to the above-described embodiments, and the present invention without departing from the gist of the present invention as claimed in the following claims. Anyone with ordinary knowledge in the field will understand that various changes are made.

1 is a front view of a conventional ground fault protection receptacle.

2 is a plan view of a receptacle according to Embodiment 1 of the present invention;

3 is a cross-sectional view taken along the line III-III of FIG.

4 is an enlarged perspective view of the first and second test buttons in the receptacle of FIG. 2;

5 is a cross-sectional view taken along the line VV of FIG.

FIG. 6 shows only the reset button and locking device in FIG. 5; FIG.

7 is a perspective view showing in detail the pressing boss of the reset button of FIG.

8 is a perspective view showing the positional relationship between the LED lamp and each button which is the main part of the present invention.

9 is a plan view of a receptacle according to Embodiment 2 of the present invention;

10 is a cross-sectional view taken along the line VII-VII of FIG. 5.

FIG. 11 is an enlarged perspective view of the first and second test buttons in the receptacle of FIG. 9; FIG.

-Explanation of symbols for the main parts of the drawing-

100,200: Receptacle 105,205: Receptacle body

110,210 ： Cover 115,215 ： Reset button

121,122: First and second test buttons 125,225: Connector

131,132: First and second button balls 135,235: York

140,240 ： Joining hole 145,245 ： Pressing part

151,152: 1st and 2nd button accommodation part 155,255: contact part

160,260 ： connection 165,265 ： first spring

171,172: First and second spring grooves 175, 275: Trip switch

180: reset guide 185: push boss

190: plunger 191: solenoid

192: third spring 194: ratchet

Claims (23)

Insulated enclosure with trip switch and reset switch on the bottom; A cover installed on an upper portion of the insulating enclosure; First and second test buttons disposed to be liftable inside the insulating enclosure, and having an upper end exposed through the cover and a lower end disposed adjacent to the trip switch; A first spring for imparting restoring force to the first and second test buttons; In the receptacle is arranged to be movable inside the insulating enclosure, the upper end is exposed through the cover, the lower end is composed of a reset button disposed adjacent to the reset switch, A solenoid on which the first or second test button is magnetized selectively by pressing a trip switch; A plunger that moves back and forth in the direction of the reset button by selective magnetization of the solenoid; A third spring for imparting restoring force to the plunger; And A ratchet installed on the plunger and selectively locking the reset button according to the moving direction of the plunger; And a locking device for selectively locking the reset button in conjunction with the lifting operation of the first and second test buttons. The receptacle of claim 1, wherein first and second button receiving portions are respectively formed in the insulating enclosure to accommodate the first and second test buttons. The receptacle according to claim 1, wherein the cover has first and second button holes for exposing upper ends of the first and second test buttons. 2. The receptacle of claim 1 wherein the first test button is an arc test button. 2. The receptacle of claim 1 wherein the second test button is a ground test button. The method of claim 1, wherein the first and second test button is A pressing part supported by the cover to be elevated; A contact portion to press the trip switch; And And a connecting portion connecting the pressing portion and the contact portion. 7. The receptacle of claim 6 wherein the contact has a tab button to substantially press the trip switch. 7. The receptacle of claim 6 wherein the first and second test buttons are arranged in a symmetrical shape. 2. The receptacle of claim 1 wherein said first spring is a leaf spring. 10. The receptacle of claim 9, wherein each of the first and second test buttons has spring grooves for receiving both sides of the leaf spring. 2. The receptacle of claim 1 wherein the first and second test buttons have first and second tap buttons to substantially press the trip switch. The receptacle of claim 1, further comprising a reset guide for guiding the lifting operation of the reset button. 13. The receptacle of claim 12 wherein the reset guide has a push boss that substantially presses the reset switch. 2. The receptacle of claim 1 further comprising a second spring resiliently supporting said reset button toward a cover. delete The receptacle according to claim 1, wherein a locking groove which enters and is caught by the ratchet is formed on an outer circumferential surface of the reset button. 2. The receptacle of claim 1 further comprising a defect indicator lamp disposed in the insulating enclosure and exposed through the cover. 2. The apparatus of claim 1, further comprising a test lamp disposed on a bottom portion of an insulating enclosure that is a lower end of the first and second test buttons, wherein the first and second test buttons are configured to transmit light emitted from the test lamp. Receptacle characterized in that the transparent material. The receptacle of claim 1, further comprising a reset lamp disposed on a bottom portion of the insulating enclosure, which is a lower end of the reset button, wherein the reset button is made of a transparent material to transmit light emitted from the reset lamp. delete delete delete delete