KR20170029765A - Apparatus for grounding and breaking leakage current non-ground concent - Google Patents

Apparatus for grounding and breaking leakage current non-ground concent

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Publication number
KR20170029765A
KR20170029765A KR1020150126763A KR20150126763A KR20170029765A KR 20170029765 A KR20170029765 A KR 20170029765A KR 1020150126763 A KR1020150126763 A KR 1020150126763A KR 20150126763 A KR20150126763 A KR 20150126763A KR 20170029765 A KR20170029765 A KR 20170029765A
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KR
South Korea
Prior art keywords
line
ground
grounding
voltage line
input side
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KR1020150126763A
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Korean (ko)
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KR101779363B1 (en
Inventor
신주현
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신주현
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Priority to KR1020150126763A priority Critical patent/KR101779363B1/en
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Application granted granted Critical
Publication of KR101779363B1 publication Critical patent/KR101779363B1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H01R13/652—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding   with earth pin, blade or socket
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/70—Structural association with built-in electrical component with built-in switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/70—Structural association with built-in electrical component with built-in switch
    • H01R13/713—Structural association with built-in electrical component with built-in switch the switch being a safety switch

Abstract

The present invention relates to an apparatus for grounding and earth leakage breaking for a non-grounded electrical outlet. The apparatus for grounding and earth leakage breaking for a non-grounded electrical outlet comprises: a non-grounded two-line (i.e., a voltage line and a ground line) input plug which is included in an input side, and which is connected to a non-grounded electrical outlet; a three-line (including a voltage line and a ground line) output electrical outlet which is included in a load side and which includes an outlet ground electrode connected to a plug; a ground switch which includes a first switching unit, configured to switch the voltage line of the input side with the ground line of the input side, and a second switching unit configured to have a structure enabling the outlet ground electrode to be connected to a common contact and configured to switch the voltage line of the load side with the ground line of the load side, which operates the first and second switching units in conjunction with each other based on button operation of a user, a state of which is switched over any one of a first state in which the voltage line of the input side is connected to the ground line of the load side and a second state in which the ground line of the input side is connected to the voltage line of the load side, and which maintains a grounded state through ground switching based on button operation of the user; and an electroscope which has an electrical connection to a common contact of the first switching unit, which detects a contact with a user body, which turns on or off and a lamp based on an electric potential difference between the user body (i.e., a ground) and a line of the input side connected via the first switching unit, and which determines whether a voltage line of the non-grounded electrical outlet is connected to the voltage line of the input side or to the ground line of the input side and whether a ground line of the non-grounded electrical outlet is connected to the voltage line of the input side or to the ground line of the input side. Accordingly, ground can be established through selection of a ground line from among two lines of 220 V, thereby providing an advantage in which both an existing non-grounded electrical outlet and a ground electrical outlet can be used.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a grounding and earth leakage circuit breaker,

The present invention relates to a grounding and earth leakage breaker for ungrounded outlets used in ungrounded outlets.

In general, ungrounded outlets have no grounding pole (or grounding wire), so if an outlet with a grounding pole is used, the grounding wire of the appliance is not normally connected and the earth leakage breaker does not operate or there is a danger of electromagnetic waves.

Therefore, in order to replace with a grounded outlet, an additional grounding work must be performed on the existing building, and the additional grounding work costs about 100,000 to 3,000,000 won per one household. Therefore, we have devised an electrical leak detection method and device for a grounded outlet that connects and disconnects the ground wire of two 220V lines supplied from KEPCO without additional grounding work. As shown in Fig. 1, (a) the grounding type outlets 200 and 210 are wired in three lines including the voltage line and the grounding line, and (b) the ungrounded outlets 250 and 260 are wired in two voltage lines.

According to the results of the research, 99% of the households surveyed about 2 million household electrical outlets in 1999, 70% or more of ungrounded outlets are used, so it is urgent to take measures against fire risk such as electric shock, electromagnetic wave exposure and static electricity. As a result of the study.

As shown in Fig. 2, (a) no grounding type multi-outlet has no grounding pole, and (b) a grounding type multi-outlet has an earthing pole. If you connect an additional multi-tap to an existing outlet, you will not be able to ground it because the grounding wire is not connected if a grounding-type outlet is used in combination with ungrounded multi-tap.

Likewise, a grounded multi-tap can not be grounded in a conventional ungrounded outlet. As such, most people mistakenly use the grounding pole of an outlet without distinguishing it, and are exposed to electric shock and electric shock risk in the event of a short circuit.

In particular, in order to prevent electric shock and to block electromagnetic waves during a short circuit such as a dryer, a washing machine, or a microwave oven, a grounding outlet, a grounding multi-tap, and a grounding plug must be used. However, most people do not distinguish between grounded and ungrounded outlets. Case 1 in Fig. 3 uses a grounded multi-tap or a grounding plug in a grounded outlet, Case 2 uses a grounded outlet to ground the building, but uses a grounding plug There is a danger of electric shock because ground line is not connected.

According to the Electricity Disaster Statistical Analysis published by Korea Electric Safety Corporation in 1997, there were 177 deaths among the 972 cases of electric shock deaths and injuries. In addition, 571 people were injured in an electric shock during the year 2012, and two electric shocks were reported per day. In particular, the number of electric shock accident casualties caused by high-voltage and extra-high voltage electricity stood at 168, while the number of deaths from electric shocks related to low-voltage electric shocks such as 220V used at home was 403, 37.8% at factories and 27.8% It was ranked second, and it was found that there is a high risk of electric shock in the home.

The present invention relates to a method for improving the problem of the ungrounded outlet, and a solution for use as the performance of a grounded outlet without additional grounding work.

Specifically, one of the key tasks to be solved in the present invention is as follows: First, one of the 220V 2 lines of the KEPCO has a common ground (ground reference), the KEPCO ground is commonly used as a ground (without additional grounding) Third, the grounded outlet is not shielded by electromagnetic waves because there is no grounding line, and the leakage breaker is not normally operated in the case of a short circuit. The grounding line is connected to the grounding line of the power line. And to provide a grounding and earth leakage breaker for ungrounded outlets for improving the problem that is not caused by the earth leakage.

According to the present invention, the grounding method and the grounding standard of the Korean are supplied from the extra high voltage line through the transformer 10 as shown in FIG. One line of 220V line (40, blue line) is grounded (20) to the customer side and one line of the 220V line is supplied to the customer side while being grounded. According to the IEC standard (IEC 60364, etc.), which is the international electric equipment standard, the grounding method is divided into TN, TT and IT. In Korea, TN grounding method is used for protection against electric shock, and in particular, electrical equipment technical standards specify that KEPCO ground 20 and customer ground 100 are shared.

Particularly, since 2002, a separate grounding (100) is required for building expansion and contraction. However, according to the electrical equipment technical standards, if customer's ground (100) is difficult, it is possible to share with KEPCO ground wire (20), but not to use it because 1 line of 220V 2 KEPCO supply does not know the ground wire And a separate ground is provided on the side of the ground. Therefore, the present invention is based on the fact that the 220V that enters the household from KEPCO is two wires (voltage line, ground wire), and one of them is grounded at the KEPCO side. It is a solution that can ground without additional ground work.

Fig. 5 is an analysis of a case where the earth leakage breaker is not operated in a grounding outlet and a non-grounding outlet. When a grounded outlet is used, the leakage current flows to the earth electrode during a leak, and the earth leakage breaker operates normally. However, when the grounding receptacle 250 is used, as shown in FIG. 5 (a), there is a problem that the earth leakage breaker is not operated because the grounding plug 250 is not normally connected through the grounding plug 210 of the dryer. The detection principle of the earth leakage breaker is to measure the difference between the currents of the voltage line and the ground line by passing the voltage line and the ground line through the video current transformer 330. The difference is 0 (leakage current is 0) because the current of the incoming voltage line is the same as the current of the incoming voltage line. However, if the grounding outlet is used (300) The grounding plug 210 and the grounding receptacle 200 are connected to each other so that a current difference between two lines is generated in the video current transformer 330 of the earth leakage breaker 80. If a difference in leakage current occurs through the grounding line at this time, The breaker is operated. However, when the ungrounded type socket outlet 310 is used, leakage current can not be transmitted through the ground line between the grounding plug 90 and the non-grounding receptacle 250 during a short circuit.

To this end, the present invention provides a three-wire (voltage line, ground wire) output receptacle comprising an ungrounded two-wire (voltage line, ground wire) input plug connected to a non-grounding receptacle on the input side and an outlet earth pole connected to the load side plug A first switching unit configured to change a voltage line and a ground line on the input side and a second switching unit configured to change a voltage line and a ground line on the load side with a configuration in which the outlet earth electrode is connected to a common contact, A first state in which the first switching unit and the second switching unit are interlocked and connected to a ground line on the input side and a ground line on the load side and a second state connected to a ground line on the input side and a voltage line on the load side, A ground changeover switch for maintaining the grounded state in accordance with the user's key operation and grounding, (Ground) and an input side line connected through the first switching unit, and is turned on or off according to a potential difference between the detected user human body (ground) and the input side line through the first switching unit, And a checker for verifying whether or not each of the voltage lines and the grounding line of each of the plurality of lines is connected to the same line or between the other lines.

Preferably, a circuit breaker is provided between the input plug and the output receptacle and has a connection configuration between the voltage line and the ground line, and operates in accordance with leakage current of the device connected to the plug, And a control unit for controlling a leakage current cutoff operation of the breaker based on the current difference information detected by the image current transformer, wherein the image current transformer comprises a secondary side voltage line and a ground line of the circuit breaker, And a grounding line connected to an earth grounding electrode of the outlet of the grounding changeover switch is formed so as to penetrate in a direction opposite to a K, L direction with a secondary grounding line of the circuit breaker, When the information of occurrence of the difference between the currents is inputted By sensing the former, characterized in that that the short-circuit breaking operation of the breaker.

According to the present invention, the "grounding-type earth-leakage circuit breaker-built-in receptacle" according to the present invention is simply connected to a conventional grounding-type power outlet without grounding. The principle of the present invention is to find a grounded line in the 220V 2-line KEPCO to confirm whether it is normally grounded. At this time, if the indicator is not lit, press the ground changeover switch and the lamp of the detector will be turned on and it will be normally grounded. Therefore, it is advantageous to use both existing grounded and grounded outlets because it finds and grounds grounding line of 220V 2 lines.

Especially, since there is no grounding wire (grounding pole) due to the problem of ungrounded outlets, leakage current can not be flowed to ground at the time of leakage current. Therefore, there is a danger that the earth leakage breaker is not operated, static electricity is generated, It has the advantage of being able to safely prevent electric shock, electromagnetic wave, static electricity and the like by the same effect as a grounding outlet.

FIG. 1 is a view showing a difference between a grounding-type outlet and a grounding-type outlet according to the present invention.
FIG. 2 is a view showing a non-grounded type and a grounded type multi-outlet comparison point according to the present invention.
3 is a view showing an ungrounded state due to misuse of the receptacle according to the present invention.
4 is a view illustrating a Korean grounding method according to the present invention.
5 is a diagram showing an example of the operation of the earth leakage breaker according to the present invention.
6 is a diagram illustrating the configuration of a grounding and earth leakage preventing device for a grounded outlet according to the present invention.
7A to 7C are views illustrating a method of using a grounding and earth leakage preventing device for a grounded outlet according to the present invention.
FIG. 8 is a view sequentially showing the operation of the earth and earth leakage preventing device for a ungrounded outlet according to the present invention.

6 is a diagram illustrating the configuration of a grounding and earth leakage preventing device for a grounded outlet according to the present invention.

As shown in Fig. 6, the apparatus is constituted in a non-grounded two-wire (voltage line, ground wire) input plug 401 connected to a non-grounded receptacle on the input side, A voltage line, and a grounding line). A ground changeover switch 430 for changing a voltage line and a grounding line in the apparatus, and a detector 440 and 450 for notifying the user of the grounded state of the apparatus connected to the ungrounded outlet.

The input plug 401 is an ungrounded two-wire (voltage line, ground wire) input plug. Specifically, a 220V power supply is configured to receive two lines (voltage line, ground line) and is configured as a plug or an input terminal.

The output receptacle 402 is a three-wire (voltage line, including ground wire) output receptacle having an outlet earth electrode connected to a plug (e.g., a grounding plug).

The grounding switch 430 has a first switching unit for changing the input voltage line and a grounding line and a second switching unit for changing the voltage line and the grounding line of the load with the connection of the outlet earth electrode to the common contact, A first state in which the first switching unit and the second switching unit are interlocked and connected to a voltage line on the input side and a ground line on the load side and a second state connected to a ground line on the input side and a voltage line on the load side, And the ground state is maintained by switching to the ground according to the user key operation.

The detectors 440 and 450 have an electrical connection configuration with the common contact of the first switching unit and sense the user's human body contact and are turned on by the potential difference between the sensed user's body (ground) and the input side line connected through the first switching unit Otherwise, it is checked whether the ungrounded outlet and each of the voltage lines and the ground line on the input side are connected to one another or between different lines. The detectors 440 and 450 are provided with a detection sensor 440 for detecting a user's body contact and a display unit 440. The detection unit 440 detects the user's body (ground) The display member is turned off when a line-to-line potential difference is generated, and when the potential difference between the user's body (ground) sensed by the detection sensor and the input side line connected through the first switching unit has not yet occurred, And a detection and detection judging unit 450 for checking whether the grounding sockets and the respective voltage lines and the grounding lines on the input side are connected to one another or between other lines.

The circuit breaker 410 is installed between the input plug 401 and the output receptacle 402 and has a connection structure between the voltage line and the ground line. Under the control, the earth leakage cutoff operation is performed.

The video current transformer 330 detects the current difference between the voltage line of the circuit breaker 410 and the ground line. The ground bridge of the circuit breaker 410 is connected to the ground line connected to the earth grounding terminal of the outlet of the grounding switch 430. The grounding line of the grounding line of the circuit breaker 410 is connected to the secondary side voltage line of the circuit breaker 410, Leakage is detected by penetrating the ground wire in the opposite direction to the K and L directions.

The control unit 420 controls the electric leakage current cutoff operation of the circuit breaker 410 based on the current difference information detected by the video current transformer 330. When the control unit 420 receives the current difference information between the secondary side voltage line of the video current transformer 330 and the ground line connected to the outlet earth electrode, the control unit 420 senses a short circuit and performs an earth leakage cutoff operation of the circuit breaker 410. When the controller 420 receives the ON command of the breaker 410 in a state in which the detectors 440 and 450 are turned off, the control unit 420 detects the current between the secondary voltage line of the video current transformer 330 and the ground line When it is confirmed that the difference between the secondary side voltage line of the video current transformer 330 and the ground line connected to the grounding electrode is generated, the circuit breaker 410 is forcibly turned off, Protection process.

The test button 470 is a button for testing whether the breaker 410 operates normally.

The leakage resistor 480 is connected to the voltage line and the earth electrode of the bridge transformer 330 so that the leakage resistor 480 operates according to the difference between the currents and tests whether the breaker 410 is normally operated. In this case, when the test button 470 is pressed, when the control unit 420 receives the current difference information between the secondary side voltage line of the video transformer 330 and the ground line connected to the earth ground of the outlet by the leakage resistor 480, And turns on the leakage current interruption operation of the circuit breaker 410. [

7A to 7C are diagrams for explaining the operation of the earth and earth leakage preventing device for a grounded outlet according to the present invention.

7A, when the touch sensor 440 is touched while the ungrounded outlet 250 and the input plug 401 are normally connected to the voltage line and the ground line, the lamp 450 of the detector is turned on Normally, the ground wire is connected to the earth pole. If the earth leakage breaker is ON, the ground wire is normally supplied to the output socket.

7B, when the voltage line and the ground line of the ungrounded socket 250 are touched with the contact line sensor 440 while the voltage line of the input plug 401 and the ground line are different from each other, It does not light up. The reason for this is that the detection lamp is not turned on because the detector 450 is connected to the earth electrode of the unground earthing receptacle 250. At this time, the earthing electrode is connected to the voltage line in a state where the power is off (OFF) The safety device is configured such that the circuit breaker trips (automatically turns off) by a short circuit.

7C, when the input plug of the apparatus is connected to the ungrounded receptacle 250 and the ground changeover switch 430 is pressed in a state in which the detector is not lit, the input side voltage line and the ground line are changed It lights up on the detector. In addition, since the breaker load side voltage line and the ground line are changed and connected at this time, it is configured to be able to be grounded safely.

8 is a view illustrating an operation of a grounding and earth leakage preventing device for a grounded outlet according to the present invention.

As shown in FIG. 8, the grounding and earth leakage breaker for a grounded outlet according to the present invention connects the apparatus to a grounded outlet and judges whether or not the ground wire is normally connected to a lamp light state of the detector.

That is, when the touch sensor senses a touch of a human body (hand) and a potential difference occurs between the sensed user's body (ground) and the input-side line (specifically, the input-side line connected through the first switching unit) In the lamp light condition of the detector, it is judged that the ungrounded outlet and each voltage line of the input side and the ground wire are normally connected to the same line. On the other hand, when the detected voltage difference between the user's body (ground) and the input line is not detected, the voltage of the ungrounded outlet and the input voltage line are changed and connected to each other, that is, (S81 to S83).

When the switchgear is turned on, the grounding line switch is maintained in the current state since the grounding line of the breaker secondary grounding line is normally connected to the grounding electrode of the outputting outlet through the contact of the grounding switching switch (S84).

Further, if the lamp of the detector is turned on, the circuit breaker is turned on (S85) so that the power is normally output to the outlet (S86).

On the other hand, when the lamp of the detector is turned off, press the ground changeover switch (S87) to change the voltage line and the ground line to secure the ground connection. At this time, the lamp of the detector turns on, and the ground wire is normally connected.

In this state, the secondary side voltage line and the ground line of the circuit breaker are passed through the ZCR (Zero Phase Transformer) to detect the leakage current, and the ground line from the ground changeover switch is further reversed to the K and L direction And the leakage current is detected.

At this time, since the leakage current is 0 (A) because there is no leakage current of the earth electrode in the steady state, and the current of the voltage line and the ground line are the same, the detection current of the video current transformer is also 0 (A). However, in case of leakage from the load side, the current of the voltage line is divided into the current of the ground line and the current of the earth electrode, and since the direction of the current of the ground line and the earth electrode is opposite, Current - Current of ground wire ".

When the current difference between two lines is generated, that is, when the current difference information between the secondary side voltage line of the video transformer and the ground line connected to the grounding electrode of the outlet is inputted, the controller detects the short circuit and turns on the circuit breaker operation of the circuit breaker. .

On the other hand, when the earth leakage breaker is turned ON in the state that the lamp of the detector is turned off (S90), since the earth electrode is connected to the voltage line, the earth leakage breaker is tripped by the leakage current (S91).

That is, when a command to turn on the ground fault interrupter is inputted in a state where the lamp of the detector is turned off, the control unit checks the current difference information between the secondary voltage line of the video surge transformer and the ground line connected to the grounded earth electrode, When the occurrence of a difference in current between the secondary side voltage line of the video current transformer and the ground line connected to the outlet earth electrode is detected, the circuit breaker is forcibly turned off. That is, since the earth electrode is connected to the voltage line, the leakage circuit breaker is tripped by the leakage current.

When the earth leakage line is normally connected and the earth leakage test button is pressed in the earth leakage test section (S88), the earth leakage breaker is leaked by the leakage resistance, so that the normal operation state can be known.

That is, when the test button is pressed to test whether the breaker is normally operated in a state that the ground wire is normally connected, a difference in current is generated by the voltage line from the image current transformer and the leakage resistance connected to the earth electrode, When the difference information of the current generated by the current transformer is inputted from the image transformer, that is, when the current difference information between the secondary side voltage line of the video transformer and the ground line connected to the earth ground of the outlet is inputted, ) (S89).

Description of the Related Art [0002]
401: input plug 402: output outlet
410: breaker 420:
430: ground changeover switch 440:
450: Judgment and detection judgment unit 330:
470: Test button 480: Leakage resistance

Claims (5)

Ungrounded 2-wire (voltage line, ground wire) input plug that is configured on the input side and connected to a ungrounded outlet;
3-wire (voltage line, ground wire included) output receptacle with an outlet earth pole configured on the load side and connected to a plug;
And a second switching unit for changing a voltage line and a ground line on the load side, the first switching unit changing the voltage line and the ground line on the input side, and the second switching unit having a configuration in which the socket grounding electrode is connected to a common contact, The switching unit and the second switching unit are interlocked with each other to change a state between a first state connected to a voltage line on the input side and a ground line on the load side and a second state connected to a ground line on the input side and a voltage line on the load side, A ground changeover switch for performing a ground change according to an operation to maintain the ground state; And
(Ground) and an input side line connected through the first switching unit, and is turned on or off according to a potential difference between the detected human body (ground) and an input side line connected through the first switching unit, An unauthorized receptacle and a detector that verifies that each voltage line and ground line on the input side are connected in-line or between different lines;
And an earth leakage breaker for the ungrounded outlet. The method according to claim 1,
The above-
A detection sensor for detecting a human body contact; And
Wherein the display member is turned on when a potential difference is generated between a user's body detected by the detection sensor and an input side line connected through the first switching unit and the user's body detected by the detection sensor And when the potential difference between the input side lines connected through the first switching unit does not occur, the display member is turned off, and it is checked whether the voltage line and the ground line of the ungrounded outlet and the input side are connected to each other, Detection judgment unit;
And an earth leakage breaker for the ungrounded outlet. The method according to claim 1,
A circuit breaker installed between the input plug and the output receptacle and having a connection structure between the voltage line and the ground line, the circuit breaker corresponding to leakage current of the device connected to the plug;
A video current transformer for detecting a current difference between a voltage line and a ground line of the breaker; And
And a controller for controlling an electric leakage current interruption operation of the circuit breaker based on current difference information detected by the image current transformer
Including,

The image deflector includes:
And a grounding line connected to an earth grounded contact of the outlet of the grounding changeover switch is formed to penetrate in a direction opposite to the K and L directions with respect to the secondary grounding line of the circuit breaker,

Wherein,
Wherein the controller is configured to detect an electric leakage current when the voltage difference between the secondary side voltage transformer and the ground line connected to the grounding electrode is inputted to turn on the electric leakage cutoff operation of the circuit breaker. Earth leakage breaker. The method of claim 3,
Wherein,
The control unit checks the current difference information between the secondary side voltage line of the video current transformer and the ground line connected to the outlet earth electrode when the breaker ON command is inputted and if the secondary side voltage line of the video current transformer and the outlet earth electrode And when the occurrence of a difference in current between the grounding line connected to the grounding line is detected, the circuit breaker is forcibly tripped so that a safety protection process is performed. The method of claim 3,
A test button for testing whether the breaker operates normally; And
A leakage resistor connected to the voltage line and the earth electrode from the image current transformer and configured to operate according to a difference between the currents to test whether the breaker operates normally or not;
Wherein the grounding and earth leakage blocking device for a grounded electrical outlet.
KR1020150126763A 2015-09-08 2015-09-08 Apparatus for grounding and breaking leakage current non-ground concent KR101779363B1 (en)

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Publication number Priority date Publication date Assignee Title
WO2019009634A1 (en) * 2017-07-06 2019-01-10 주식회사 티피티 Non-grounding electric leakage prevention device
CN108022491A (en) * 2017-12-27 2018-05-11 国家电网公司 Energy saving experience apparatus, energy saving experience platform
CN108022491B (en) * 2017-12-27 2024-04-09 国家电网公司 Energy-saving experience device and energy-saving experience table
KR102118444B1 (en) * 2019-11-13 2020-06-03 박성욱 Cylindrical Multi-tap

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