KR100536106B1 - Power switching device for preventing error operation by high frequency current contact and device cut off leakage of electricity therefor - Google Patents

Abstract

The present invention is the time difference between the N-phase and R-phase of the power line when the power supply is initially supplied from the earth leakage breaker that cuts off the power when the leakage voltage or the flooding occurs over the set voltage to electrical structures such as street lights, traffic lights, poles, etc. Therefore, the present invention relates to an electronic switch for preventing high frequency malfunction, and a circuit breaker using the same, and a method of preventing the power supply from being cut off due to a malfunction caused by a high frequency current.

The earth leakage circuit breaker of the present invention detects the current state of the commercial power supply from the outside and blocks the commercial power supply when an overcurrent or ground fault current flows, and receives a power supplied through the circuit breaker for a predetermined time. A street lamp lighting controller for outputting a street lamp lighting control signal and a street lamp lighting control signal for each time; an image transformer for detecting leakage current from each of the electric loads; and when the image transformer detects a leakage current, the AC power is cut off. And a relay for sequentially generating the switching-on signals of the N-phase and the R-phase of the AC power supply with a preset time difference when the streetlight lighting control signal is generated from the streetlight lighting controller, and the switching-on signal output from the relay. First mag connecting the switching contact of N phase of AC power And then by a bit switch and the switching-on signal output from the relay connected to the contacts of the first switch, a magnet and a second magnet switch for connecting the switch contacts on the AC power supply R.

According to the present invention, when the lamp is turned on by supplying power every time set to a load such as a street lamp, the switch contact of the R phase of the AC power is connected before the switch contact of the N phase due to a defect of the magnet switch, and thus a leakage current is generated due to high frequency. The magnet switch is turned off to prevent the power supply from being cut off.

Description

Electronic Switching Device for High Frequency Malfunction Prevention and Earth Leakage Breaker Using the Same {POWER SWITCHING DEVICE FOR PREVENTING ERROR OPERATION BY HIGH FREQUENCY CURRENT CONTACT AND DEVICE CUT OFF LEAKAGE OF ELECTRICITY THEREFOR}

The present invention relates to a ground fault interrupting device, and in particular, a power line when the power supply is initially supplied by a ground fault interrupting device which cuts off the power when a leakage voltage or a flood occurs above a set voltage in an electric structure such as a street light, a traffic light, a pole, etc. The present invention relates to an electronic switchgear for preventing high-frequency malfunctions and an earth leakage circuit breaker using the same, in which the N-phase is preferentially contacted due to a difference in contact time between the N-phase and the R-phase.

In general, when leakage current and leakage voltage flow to the outside of electric structures such as street lamps and traffic signals installed on roads, various industrial equipment used in factories and houses, bathroom outlets, washing machines, refrigerators, etc. In the event of flooding or flooding, the power supply must be shut off to prevent electric shock.

An electric shock accident prevention apparatus for shutting off power to prevent an electric shock accident when flooding occurs such as a street light or a traffic signal is disclosed in Korean Patent Application Publication No. 10-2004-41001 filed by the present applicant.

Referring to FIG. 1, a main circuit breaker 12 which detects a current state of a commercial power source introduced through the meter 10 from the outside and blocks the commercial power supply when an overcurrent or ground fault current flows, and the main circuit breaker ( 12) A sub-circuit breaker for disconnecting the power supply when an overcurrent or ground current flows from each electric load, and supplies the AC power to each general electric load by being branched from the wire. (16), and a streetlight lighting controller (14) for receiving a power supplied through the main circuit breaker (12) and outputting a streetlight lighting control signal and a streetlight lighting control signal every predetermined time, and a leakage current from each of the electric loads. When the image current transformer 18 and the image current transformer 18 detect the leakage current, the AC power supply cuts off the AC power. A relay 20 for controlling and cutting off the AC power when an overcurrent is detected from the current transformer 21, and a magnet switch 22 for cutting off the AC power by the AC power cutoff control signal from the relay 20; In addition, the electric shock output unit 24 is configured to receive an AC output from each of the relays 20 and generate a ground fault current when a leakage voltage of more than a set voltage is generated.

The main circuit breaker 12 and the sub-circuit breaker 14 may be composed of, for example, a MULTED CASE CIRCUIT BRAKER (MCCB) or an EARTH LEAKAGE CIRCUIT BREAKER (ELCB), which may be an apartment, officetel, or building. It is applied to power circuit breaker used for power load and line protection of buildings, etc. The structure of MCCB or ELCB circuit breaker such as single phase 220V has 2 input terminal and 2 output terminal in the case of single phase MCCB (MOULDED CASE) CIRCUIT BRAKER) is used as a circuit breaker for overload overcurrent protection and ELCB (EARTH LEAKAGE CIRCUIT BRAKER) is used as a circuit breaker for short circuit and overload overcurrent protection. The circuit breaker can be switched off in case of overload and over current of the load. ON SWITCHING can be used.

In addition, ELCB (aka ELB) has a function that uses ZCT (Image Current Transformer) 18 to detect and switch the difference between input current and output current when there is leakage and leakage current in the load. have.

The electric shock prevention unit 24 is installed at a position spaced apart from the ground (for example, 50 mm) on a pontoon such as a street lamp, a traffic light, or a pole, and an immersion sensing rod for detecting an inundation state, and one sensing rod embedded in the ground And another leak detection rod connected to the pontoon, a leak detection rod for detecting a submerged state from the immersion detection rod, and detecting whether a leakage voltage above a set voltage is generated by the leak detection rod; When the leakage voltage and the submerged state is detected from the leakage voltage and immersion detection unit is provided with a power off signal generator for controlling to generate the ground current, over current, short circuit current in sequence.

The electric shock prevention unit 24 connects the R phase and the N phase of the AC power source to which the immersion and leakage voltages are to be sensed so that an overcurrent is generated, and the magnet switch 22, the main circuit breaker 12, and the sub circuit breaker 16 It is to prevent the contact damage of the lamp and the coil burnout of the transformer installed in the pole. The electric shock prevention unit 24 cuts off the AC power by opening the contacts of the magnet switch 22, the main circuit breaker 12, the sub circuit breaker 16, and the like when a short circuit (SHORT) current is generated.

In addition, the streetlight lighting controller 14 has a built-in timer to control the lamp to turn off during the day, and to control the lamp to turn on at night. The street lamp lighting controller 14 may vary according to the season. However, for example, the street lamp lighting controller 14 may turn off the street lamp from 05:30 to 20:00, and 20:01 to 05:29 am. Lights up until. The streetlight lighting controller 14 outputs a streetlight lighting control signal to the relay 20 every day at 20:01 pm. Then, the relay 20 causes the current to flow in the magnet coil MC of the magnet switch 22 to turn on the switches SW1 and SW2 so that the street lamp is turned on. At this time, the switches SW1 and SW2 should be turned on at the same time, but the R phase is turned on first and the N phase is turned on first without being turned on at the same time due to the structure of the switches SW1 and SW2, and the N phase is turned on first and the R phase is turned on.

2 is a cross-sectional view of the magnet switch 22 of FIG.

The flow guide 30 for pressing the switches SW1 and SW2 when the current flows in the magnet coil MC, and when the flow guide 30 is pressed, is compressed and the switch flow guide 30 is not pressed. A first switch contact driver 34 connected to one side of the spring 32 which is elongated and connected to one side of the flow guide 30 to connect or open the switch contact of R of the AC power source, and the switch flow guide 30 The second switch contact driver 36 is connected to the other side of the switch to connect or open the N-phase switch contact of the AC power source.

The flow guide 30 flows in the vertical direction to press the switches SW1 and SW2 when a current flows in the magnet coil MC. At this time, the spring 32 is compressed when the flow guide 30 is pressed and is elongated when the flow guide 30 is not pressed. When the flow guide 30 is pressed, the first switch contact driver 34 connects the switch contact of the R phase of the AC power source. When the flow guide 30 is pressed, the second switch contact driver 36 connects the switch contact of the R phase of the AC power source. The first and second switch contact drivers 34 and 36 include a first spring 38 and a second spring 40. When the flow guide 30 is pressed, the first and second switch contact drivers 34 and 36 are pressed by the first spring 38 and the second spring 40 so that the R-phase and N-phase contacts of the AC power supply are closed. Each is connected.

In the conventional magnet switch 22 as described above, since the first and second switch contact drivers 34 and 36 are fixed to the flow guide 30 in the same size, the magnetic switch 22 may press the flow guide 30 to turn on the street lamp. In this case, the contacts of the R and N phases of AC power are not connected at the same time by the elastic force of the spring or the flow of the spring, and are connected at regular time intervals. Leakage current flows, the leakage current caused by the high frequency generated in the N-phase cable is amplified, and the ground fault circuit breaker and the magnet switch 22 provided in the relay 20 are turned down to cause a malfunction in which the street lamp is not turned on. There was a problem.

Accordingly, an object of the present invention is to provide a high-frequency malfunction prevention electronic switch for preventing the N-phase contact first due to the time difference between the N-phase and R-phase of the power line when supplying power to turn on the street lamp in the electric shock accident prevention device and the earth leakage breaker using the same In providing a device.

Another object of the present invention is to provide a high frequency malfunction prevention electronic switching device and a ground fault interrupting device using the same to prevent the power supply from being cut off by a malfunction caused by a high frequency overcurrent when the power is supplied by a magnet switch to light a street lamp.

An earth leakage circuit breaker according to an embodiment of the present invention for achieving the above object is a street lamp lighting controller for receiving a power supplied through a circuit breaker and outputs a street lamp lighting control signal and a street lamp lighting control signal every predetermined time; An image current transformer that detects leakage current from an electric load, and controls the image current transformer to cut off the AC power when detecting the leakage current, and sets a predetermined time difference when a street light lighting control signal is generated from the street lighting controller. A relay which sequentially generates the switching-on signals of the N-phase and the R-phase of the AC power, a first magnet switch connecting the switching contact of the N-phase of the AC power by the switching-on signal output from the relay, and an output from the relay. The contact of the first magnet switch is switched Connected after it, it characterized in that a second magnet switch for connecting the switch contacts on the AC power supply R.

The preset time difference of the relay is preferably 0.1 or 0.2 seconds.

According to another aspect of the present invention, an earth leakage circuit breaker includes an image current transformer configured to receive an AC power supplied from a circuit breaker and detect a leakage current flowing from an electric load, and when the image current transformer detects the leakage current, A relay for controlling to cut off power and generating a power switching on signal when a power supply control signal is generated from the outside, a timer for delaying and outputting a power switching on signal output from the relay for a set time, and from the relay Switching of the R phase of the AC power source after the contact of the first magnet switch is turned on by a power switching on signal delayed by a predetermined time from the timer and a first magnet switch connecting the N-phase switching contact point of the AC power to the output switching ON signal. A second magnet switch connecting the contacts All.

The circuit breaker is characterized in that the set time of the timer is 0.1 seconds or 0.2 seconds

An earth leakage circuit breaker according to another embodiment of the present invention for achieving the above object, the circuit breaker for detecting the current state of the commercial power supply from the outside to cut off the commercial power supply when an overcurrent or ground fault current flows, and An image current transformer that detects a leakage current flowing from the load, and controls the image current transformer to cut off the AC power when detecting the leakage current, and when a control signal for supplying power to the electric load from the outside is generated. A relay for generating a switching-on signal of the R-phase and N-phase of the power supply, and a magnet switch connecting the switching contacts of the N-phase and the R-phase of the AC power by the switching-on signal output from the relay,

The magnet switch is a magnet coil (MC) for outputting a signal for driving the switch by the power switching on signal output from the relay, and is switched on by the drive signal of the magnet coil (MC) N-phase of the AC power source And first and second switches connecting to the switching contacts on R, respectively.

The first and the second switch is a flow guide for pressing the switch contact is connected, a spring that is compressed when the flow guide is pressed and the switch flow guide is not pressed, connected to one side of the flow guide And a first switch contact driver for connecting or opening the switch contact of the N phase of the AC power source, and connected to the other side of the flow guide, and having a shorter length than the first switch contact driver. And a second switch contact driver for connecting or opening.

In order to achieve the above object, an electromagnetic switching device for preventing high frequency malfunction of a ground fault interrupting device according to an embodiment of the present invention,

A magnet coil MC for outputting a signal for driving a switch by a power switching on signal input from the outside;

It includes a first switch and a second switch that is switched on by the drive signal of the magnet coil (MC) to connect the switching contacts of the N phase and R phase of the AC power, respectively,

The first and the second switch is a flow guide for pressing the switch contact is connected, a spring that is compressed when the flow guide is pressed and the switch flow guide is not pressed, connected to one side of the flow guide And a first switch contact driver for connecting or opening the switch contact of the N phase of the AC power source, and connected to the other side of the flow guide, and having a shorter length than the first switch contact driver. And a second switch contact driver for connecting or opening.

The first switch is driven by a switch driving signal of the magnet coil MC to connect a switching contact of N phase of AC power, and the second switch is switched on R of AC power after the contact of the first switch is turned on. It is characterized by connecting the contacts.

In accordance with still another aspect of the present invention, there is provided an electronic switching device for preventing a high frequency malfunction of a ground fault interrupting device, comprising: a timer for delaying a power switching on signal input from the outside for a set time, and a power input from the outside A first magnet switch connecting the N-phase switching contact of the AC power by a switching on signal, and a second magnet switch connecting the R-phase switching contact of the AC power by the power switching on signal delayed from the timer. do.

Preferably, the second magnet switch connects the switching contact of R phase of the AC power source after the contact point of the first magnet switch is turned on.

The electronic switching method for preventing high frequency malfunction when power is supplied to a load according to the present invention for achieving the above object is characterized in that to connect the N-phase contact first, and then the N-phase contact is connected to the R-phase contact.

Hereinafter, preferred embodiments of the present invention will be described in detail. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

Hereinafter, a high frequency malfunction preventing power switching device of the present invention will be described in detail with reference to the accompanying drawings.

4 is a circuit diagram illustrating a configuration of an earth leakage breaker according to an exemplary embodiment.

The circuit breaker 50 detects the current state of the commercial power input from the outside and cuts off the commercial power supply when an overcurrent or short-circuit current flows, and receives a power supplied through the circuit breaker 50 to turn on a street lamp every predetermined time. When the streetlight lighting controller 54 outputs a control signal and the streetlight extinguishing control signal, the image current transformer 52 which detects the leakage current flowing from each electric load, and the image current transformer 52 detects the leakage current. Controlling to cut off the AC power and switching on signals of the R phase and N phase of the AC power to have a predetermined time difference (for example, 0.1 to 0.2 seconds) when the street light lighting control signal is generated from the street light lighting controller 54. The first to connect the N-phase switching contact of the AC power supply by the relay 56 and the switching on signal output from the relay 56 sequentially generated The second magnet switch 60 connecting the switching contact of the R phase of the AC power source after the contact of the magnet switch 58 and the first magnet switch 58 is turned on by the switching on signal output from the relay 56. It consists of).

The circuit breaker 50 detects a current state of a commercial power source drawn from the outside and cuts off the commercial power supply when an overcurrent or a short circuit current flows. When the circuit breaker 50 is not a bimetal type but has a built-in sun coil, power supply is cut off by a switching off signal generated from the relay 56. The street lamp lighting controller 54 receives the power supplied through the circuit breaker 50 and outputs a street lamp lighting control signal and a street lamp lighting control signal every predetermined time. The image current transformer 52 receives AC power supplied through the circuit breaker 50 and detects that a leakage current flows from the electric load. At this time, the relay 56 cuts off the AC power when the image current transformer 52 detects a leakage current, and controls to cut off the AC power when the ground current and short circuit current are detected by the current transformer provided therein. do. In addition, the relay 56 controls the first and second magnet switches 58 and 60 so that the power supply is cut off.

In addition, while the circuit breaker 50, the relay 56, and the first and second magnet switches 58 and 60 are turned on and the power is supplied, the street light lighting controller 54 may change the street light lighting time and the unlighting time according to the season. For example, the street light is turned off for example, from 05:30 to 20: 00, and the street lamp lighting and extinguishing control signals are generated to light up from 20:01 pm to 05:29 am. At this time, the relay 56 generates a first switching-on signal when the street light lighting control signal is generated to turn on the first magnet switch 58, and when a predetermined time (for example, 0.1 to 0.2 second) elapses. A second switching on signal is generated to turn on the second magnet switch 60. Since the first magnet switch 58 connects the N-phase contacts of the AC power when the power is supplied, and for example, the second magnet switch 60 connects the R-phase contacts of the AC power after 0.1 to 0.2 seconds. Malfunctions caused by high frequency current such as 3 can be prevented.

5 is a circuit diagram illustrating a configuration of an earth leakage breaker according to another exemplary embodiment of the present invention.

The circuit breaker 100 detects the current state of the commercial power input from the outside and cuts off the commercial power supply when an overcurrent or short-circuit current flows, and receives the AC power supplied from the circuit breaker 100 and receives a leakage current from the electric load. The image current transformer 102 and the image current transformer 102 detect the flow of the electric current, and control the power supply to turn off the AC power when the current current transformer 102 detects a leakage current, and generate a power switching on signal when a power supply control signal is generated from the outside. A relay (104), a timer (106) for delaying and outputting a power switching on signal output from the relay (104) for a set time (for example, 0.1 seconds to 0.2 seconds), and an output from the relay (104). The first magnet switch 108 for connecting the switching contact of the N phase of the AC power supply to the switched ON signal and the power source switching ON signal delayed by the set time from the timer 106. As a result, the second magnet switch 110 connects the switching contact of the R phase of the AC power source after the contact point of the first magnet switch 108 is turned on.

The operation of another embodiment of the present invention will be described in detail with reference to FIG. 5.

The circuit breaker 100 detects a current state of a commercial power supply drawn from the outside and cuts off the commercial power supply when an overcurrent or a short circuit current flows. The image current transformer 102 receives an AC power supplied through the circuit breaker 100 and detects that a leakage current flows from an electric load. In this case, the relay 104 controls to cut off the AC power when the image current transformer 102 detects a leakage current. In addition, the relay 104 controls the first and second magnet switches 108 and 110 so that the power supply is cut off.

In addition, when the circuit breaker 100 is turned on and the power is supplied, the relay 104 generates a power supply switching-on signal when a power supply control signal is applied from the outside to the first magnet switch 108 and the timer 106. Is authorized. At this time, the first magnet switching 108 connects the N-phase contacts of the AC power. The timer 106 receives the power supply control signal output from the relay 104 and delays it for a preset time (for example, 0.1 to 0.2 seconds), and then generates a power supply switching on signal to generate the second magnet switch 110. ) To turn on the second magnet switch 110. When the power is supplied to the load, the first magnet switch 108 connects the N-phase contact point of the AC power source, and, for example, the second magnet switch 110 connects the R-phase contact point of the AC power source after 0.1 second to 0.2 second. Therefore, malfunction due to the high frequency current as shown in FIG. 3 can be prevented.

6 is a circuit diagram showing the configuration of an earth leakage breaker according to another embodiment of the present invention.

The circuit breaker 200 detects the current state of the commercial power input from the outside and cuts off the commercial power supply when an overcurrent or a short circuit current flows, and receives a power supplied through the circuit breaker 200 to turn on a street lamp every predetermined time. When the streetlight lighting controller 206 outputs a control signal and the streetlight extinguishing control signal, an image current transformer 202 for detecting leakage current from each electric load, and the image current transformer 202 detects a leakage current. A relay 204 for controlling to cut off the AC power and generating a switching-on signal of R phase and N phase of AC power when the street light lighting control signal is generated from the street light lighting controller 206, and the relay 204; And a magnet switch 208 for connecting the switching contacts of the N-phase and the R-phase of the AC power source by the switching-on signals outputted from the same.

The magnet switch 208 is switched on by a magnet coil MC for outputting a signal for driving the switch by a power switching on signal output from the relay 204 and a drive signal of the magnet coil MC. And first and second switches 210 and 212 respectively connecting the N and R phase switching contacts of the AC power source.

The first switch 210 is driven by a switch driving signal of the magnet coil MC to connect a switching contact of N phase of AC power. The second switch 212 connects the switching contact of the R phase of the AC power source after the contact of the first switch 210 is turned on.

FIG. 7 is a structural diagram of the first and second switches 210 and 212 of FIG. 6.

A flow guide 62 for pressing the first and second switches 210 and 212 when the current flows in the magnet coil MC, and the switch flow guide 62 is compressed when the flow guide 62 is pressed. Spring 64, which is extended when N) is not pressed, a first switch contact driver 66 connected to one side of the flow guide 62 to connect or open an N-phase switch contact of an AC power source, and the flow On the other side of the guide 62 is installed in parallel with the first switch contact driver 66, the length is shorter than the first switch contact driver 66, and connects or opens the switch contact of the R phase of the AC power source The second switch contact driver 68 is configured.

The first and second switch contact drivers 66 and 68 include a first spring 70 and a second spring 72. When the flow guide 62 is pressed, the first and second switch contact drivers 66 and 68 are pressed by the first spring 70 and the second spring 72 to contact the R phase and the N phase of the AC power source. The first switch contact driver 66 is formed to be larger than the size of the second switch contact driver 68 so that the flow guide 62 is pressed by the first switch gradually driver 68 when the flow guide 62 is pressed. 1 switch 210 is turned on first, and switch 212 is turned on later.

6 and 7 will be described in detail the operation of another preferred embodiment of the present invention.

The circuit breaker 200 detects a current state of a commercial power supply drawn from the outside and cuts off the commercial power supply when an overcurrent or ground fault current flows. The street lamp lighting controller 206 receives the power supplied through the circuit breaker 200 and outputs a street lamp lighting control signal and a street lamp lighting control signal every predetermined time. The image current transformer 202 receives an AC power supplied through the circuit breaker 200 and detects that a leakage current flows from an electric load. In this case, the relay 204 controls to cut off the AC power when the image current transformer 202 detects a leakage current. In addition, the relay 204 controls the first and second magnet switches 208 so that the power supply is cut off.

In addition, while the circuit breaker 200 and the relay 204 are turned on and the power is supplied, the streetlight lighting controller 206 may vary depending on the season, but the streetlight lighting time and the lighting time may vary depending on the season, for example, from 05:30 to 20:00. The street lamp is turned off until 00 minutes, and the street lamp lighting and extinction control signals are generated so as to turn on from 20:01 pm to 05:29 am. At this time, the relay 204 generates a power switching on signal when the streetlight lighting control signal is generated and applies it to the magnet coil MC. At this time, the flow guide 62 is pressed by the current flow of the magnet coil (MC). When the flow guides 62 are pressed, respectively, since the length of the first switch contact driver 66 is longer than the length of the second switch contact driver 68, the first switch 210 is first turned on, for example. After 0.1 second to 0.2 second, the second switch 212 is turned on.

Therefore, when the magnet switch 208 is turned on to supply power to one of the loads, the first switch 210 connects the N-phase contact point of the AC power source. For example, after the second switch (0.1 second to 0.2 second) Since 212 connects the contacts of the R phase of the AC power supply, it is possible to prevent malfunction due to the high frequency current as shown in FIG. 3.

In another embodiment of FIG. 7, the lengths of the first switch contact driver 66 and the second switch contact driver 68 are different, so that the switch contacts of the AC power source N and the R phase have a time difference. As shown in FIG. 8, the lengths of the first switch contact driver 34 and the second switch contact driver 36 are the same, and the switch contact of the N phase is always shorted as shown in FIG. 8. By only the second switch 212 is turned on. Then, when the magnet switch 208 is turned on to supply a power, one of the loads, the N phase of the AC power connected to the first switch 210 is always connected to a contact point, and the second switch 212 is connected to the AC. Since the contact of the R phase of the AC power supply in the state that the N phase of the power supply is connected, it is possible to prevent the malfunction due to the high frequency current as shown in FIG.

On the other hand, while the present invention has been shown and described with respect to specific preferred embodiments, various modifications and variations of the present invention without departing from the spirit or field of the invention provided by the claims below It can be easily understood by those skilled in the art. As described as an example, the present invention is not limited thereto, and in order to connect the N-phase and R-phase contacts of the AC power source to supply power to the load, the N-phase is first connected to the R-phase. Various modifications can be made without departing from the scope of the invention.

As described above, in the present invention, when the street lamp is turned on by supplying power at a time set to a load such as a street lamp, the N-phase switch contact of the AC power is connected before the R-phase switch contact so that leakage current by high frequency does not occur. The circuit breaker and the magnet switch are turned off to prevent the power supply from being cut off.

In addition, when supplying power to a load such as a street light, the N-phase switch contacts of AC power are connected before the R-phase switch contacts, so that the circuit breaker and the magnet switch are not turned off due to the occurrence of ground fault current due to high frequency, and the circuit breaker is manually operated. Since there is no need to return to the position where the circuit breaker is installed, there is an advantage that the street lighting management can be efficiently managed.

1 is a configuration diagram of a conventional ground fault interrupting device

2 is a cross-sectional structural view of the magnet switch 22 of FIG.

3 is a waveform diagram of a high frequency leakage current generated when the N phase of the AC power source is switched on before the R phase;

4 is a circuit diagram illustrating a configuration of an earth leakage breaker according to an exemplary embodiment of the present invention.

5 is a circuit diagram illustrating a configuration of an earth leakage breaker according to another exemplary embodiment of the present invention.

6 is a circuit diagram showing the configuration of an earth leakage breaker according to another embodiment of the present invention;

7 is a structural diagram of the first and second switches 210 and 212 of FIG.

8 is a contact structure diagram of a first switch and a second switch according to another embodiment of FIG.

         Explanation of symbols on the main parts of the drawings

100: circuit breaker 102: current transformer

104: relay 106: timer

108: first magnet switch 110: second magnet switch

Claims (10)

A street lamp lighting controller which receives the power supplied through the circuit breaker and outputs a street lamp lighting control signal and a street lamp lighting control signal every predetermined time; An image current transformer for detecting leakage current from each of the electric loads; When the image current transformer detects a leakage current, it controls to cut off the AC power, and when the street light lighting control signal is generated from the street light lighting controller, the switching ON signal of the AC power and the N phase and the R phase of the AC power are sequentially With relays, A first magnet switch connecting the switching contact of the N phase of the AC power supply by the switching on signal output from the relay; And a second magnet switch connecting the switch contact of the R phase of the AC power source after the contact of the first magnet switch is connected by the switching on signal output from the relay. In the ground fault interrupting device, An image current transformer which receives an AC power supplied from the circuit breaker and detects a leakage current from an electric load; A relay for controlling the image current transformer to cut off the AC power when detecting the leakage current, and generating a power switching on signal when a power supply control signal is generated from the outside; A timer for delaying and outputting a power switching on signal output from the relay for a set time; A first magnet switch connecting the switching contact of the N phase of the AC power supply to the switching on signal output from the relay; And a second magnet switch connecting the switching contact of the R phase of the AC power source after the contact of the first magnet switch is turned on by the power switching on signal delayed by the set time from the timer. An image transformer for detecting leakage current from an electric load; The image current transformer controls to cut off the AC power when a leakage current is detected, and generates a switching-on signal of the R and N phases of the AC power when a control signal for supplying power from the outside is generated. With a relay, A magnet switch connecting the switching contacts of the N-phase and the R-phase of the AC power by the switching-on signal output from the relay, The magnet switch is a magnet coil (MC) for outputting a signal for driving the switch by the power switching on signal output from the relay, and is switched on by the drive signal of the magnet coil (MC) N-phase of the AC power source And first and second switches connecting the switching contacts on R, respectively. The first and the second switch is a flow guide for pressing the switch contact is connected, a spring that is compressed when the flow guide is pressed and the switch flow guide is not pressed, connected to one side of the flow guide And a first switch contact driver for connecting or opening an N-phase switch contact of an AC power source, and installed at the other side of the flow guide in parallel with the first switch contact driver and having a shorter length than the first switch contact driver. And a second switch contact driver for connecting or opening the switch contact on the R phase of the AC power source. The method of claim 3, The first switch is driven by a switch driving signal of the magnet coil MC to connect a switching contact of N phase of AC power, and the second switch is switched on R of AC power after the contact of the first switch is turned on. Earth leakage circuit breaker characterized in that for connecting the contacts. In the electronic switchgear for preventing high frequency malfunction of the earth leakage breaker, A magnet coil MC for outputting a signal for driving a switch by a power switching on signal input from the outside; It includes a first switch and a second switch that is switched on by the drive signal of the magnet coil (MC) to connect the switching contacts of the N phase and R phase of the AC power, respectively, The first and the second switch is a flow guide for pressing the switch contact is connected, a spring that is compressed when the flow guide is pressed and the switch flow guide is not pressed, connected to one side of the flow guide And a first switch contact driver for connecting or opening an N-phase switch contact of an AC power source, and is installed on the other side of the flow guide in parallel with the first switch contact driver and shorter in length than the first switch contact driver. And a second switch contact driver for connecting or opening the switch contact on the R phase of the AC power source. The method of claim 5, The first switch is driven by a switch driving signal of the magnet coil MC to connect a switching contact of N phase of AC power, and the second switch is switched on R of AC power after the contact of the first switch is turned on. High frequency malfunction prevention electronic switchgear characterized in that for connecting the contacts. In the electronic switchgear for preventing high frequency malfunction of the earth leakage breaker, A timer for delaying a power switching on signal input from the outside for a set time; A first magnet switch connecting the N-phase switching contact of the AC power by the power switching ON signal input from the outside; And a second magnet switch connecting the R phase switching contact of the AC power by the power switching on signal delayed from the timer. The method of claim 7, wherein The second magnet switch is a high-frequency malfunction preventing electronic switching device, characterized in that for connecting the switching contact of the R phase of the AC power after the contact of the first magnet switch is turned on. In the electronic switchgear for preventing high frequency malfunction of the earth leakage breaker, A magnet coil MC for outputting a signal for driving a switch by a power switching on signal input from the outside; A first switch whose switch contact is always fixed-short-connected on N phase, And a second switch that is switched on by a drive signal of the magnet coil (MC) and connects a switching contact of an R phase of an AC power source. (delete)