KR20060071692A - Circuit breaker including magnetic core - Google Patents

Abstract

The present invention relates to an earth leakage circuit breaker having a magnetic core, and more particularly, to a core of an image current transformer (ZCT: Zero-Phase Current Transformer) built in an earth leakage circuit breaker, having excellent magnetic properties, such as nanocrystalline alloys, amorphous alloys, and ferrites. And a metal core or the like, and efficiently change the magnetic characteristics of the core to an electrical signal to facilitate leakage current detection through the image current transformer (ZCT) when leakage current is generated due to overcurrent or short circuit. Fire, equipment damage and electric shock can be prevented in advance, and semi-permanent magnetic characteristics can be realized without limiting the use time and the range of use at high current, thereby extending the life of the earth leakage breaker. The present invention relates to an earth leakage breaker having a magnetic core capable of improving performance.

The present invention provides a power supply unit for supplying power to the earth leakage breaker and the load from the power supply; A load part in which power supplied from the power supply part is consumed; A wire connected from the power supply unit to the load unit penetrates and detects a leakage current generated by an overcurrent, an electric leakage, or a short circuit through an image current transformer (ZCT) including one of nanocrystalline alloys, amorphous alloys, ferrites, and metal cores. Leakage current detection unit for transmitting to the electronic circuit unit; Receives and amplifies the current value detected from the ground fault detecting unit, and compares the amplified current value with a predetermined reference value to continue supplying power to the load unit if the reference value is less than the reference value, and if it is above the reference value, trip coil An electronic circuit unit generating a control signal for driving and transmitting the control signal to the trip coil unit; A trip coil part receiving a control signal from the electronic circuit part and driving a trip coil according to the control signal; As the trip coil of the trip coil part is driven, the opening / closing mechanism is tripped in conjunction with the trip coil, and as the opening / closing mechanism is tripped, the opening / closing switch connected to the opening / closing mechanism is turned off to be supplied from the power supply part to the load part. An opening and closing mechanism to cut off power; A display unit which is formed on an upper side of the earth leakage breaker outside and displays a state of the earth leakage breaker according to a state of an open / close switch of the switch unit; Characterized in that it comprises a test unit for confirming the normal operation of the earth leakage breaker through a test switch formed on the upper side of the external leakage breaker.

Therefore, the present invention comprises a core of an image current transformer (ZCT) built in an earth leakage circuit breaker composed of nanocrystalline alloys, amorphous alloys, ferrites, metal cores and the like having excellent magnetic properties, and efficiently the magnetic properties of the cores as electrical signals. When leakage current occurs due to an overcurrent, an electric leakage, a short circuit, or the like, the leakage current can be easily detected through the current transformer ZCT, thereby preventing fire, device damage, and electric shock. In addition, by realizing the semi-permanent magnetic characteristics without limiting the use time and the range of use at high current, it is possible to extend the life of the earth leakage breaker and improve the operating performance.

Earth Leakage Circuit Breaker, Image Current Transformer (ZCT), Tripcoil, Amorphous Alloy Core, Nano Grain Alloy Core, Ferrite Core, Metal Core

Description

Circuit breaker including magnetic core {Circuit breaker including magnetic core}

1 is a perspective view showing an external configuration of a general earth leakage breaker.

Figure 2 is a perspective view showing the internal configuration of the earth leakage breaker according to an embodiment of the present invention.

Figure 3 is a block diagram showing the internal configuration of the earth leakage breaker according to an embodiment of the present invention.

4 is a perspective view showing a video current transformer (ZCT) according to an embodiment of the present invention.

5 is an internal circuit diagram of an earth leakage breaker according to an exemplary embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

1.Earth Circuit Breaker 10 ... Power Supply

11 Power supply terminal 20 Load side

21 Load side connection terminal 30 Earth leakage detector

31 ZCT 311 Core

312 ... current transformer hole 40 ... electronic circuit part

41 ... amplifier 42 ... comparison

43.Control section 50 ... Trip coil section

51 ... trip coil 60 ... opening and closing mechanism

61 ... opening and closing mechanism 62 ... opening and closing switch

70 ... Display 80 ... Test

81 ... Test Button 82 ... Test Switch

The present invention relates to an earth leakage circuit breaker having a magnetic core, and more particularly, to a core of an image current transformer (ZCT: Zero-Phase Current Transformer) built in an earth leakage circuit breaker, having excellent magnetic properties, such as nanocrystalline alloys, amorphous alloys, and ferrites. And a metal core or the like, and efficiently change the magnetic characteristics of the core to an electrical signal to facilitate leakage current detection through the image current transformer (ZCT) when leakage current is generated due to overcurrent or short circuit. Fire, equipment damage and electric shock can be prevented in advance, and semi-permanent magnetic characteristics can be realized without limiting the use time and the range of use at high current, thereby extending the life of the earth leakage breaker. The present invention relates to an earth leakage breaker having a magnetic core capable of improving performance.

In general, an earth leakage breaker detects a leakage current due to an overcurrent, an electric leakage, a short circuit, etc. at a load end of a circuit or an apparatus using electricity, and cuts off the power supplied to the load end when the leakage current occurs. An image current transformer (ZCT) that detects leakage current between the load stages and a trip coil portion that turns off the power supplied to the load stage by driving the trip coil when the leakage current occurs, To protect.

However, in the case of the core of an image transformer (ZCT) built in a conventional earth leakage circuit breaker, the efficiency of the magnetic current is converted into an electrical signal, and thus, when the leakage current signal due to overcurrent, short circuit, short circuit, etc. is very weak, Detection of leakage current through the current transformer ZCT could not be facilitated. In addition, since the use time limit and the range of usable current values at a high current are limited according to the material constituting the core, there is a problem in that the lifespan of the ground fault circuit breaker is short and its operating performance is lowered.

Accordingly, the present invention has been conceived to solve the above problems, the core of an image current transformer (ZCT) built in an earth leakage circuit breaker is composed of nanocrystalline alloys, amorphous alloys, ferrites, metal cores and the like having excellent magnetic properties, the core The magnetic characteristics of the device can be effectively changed to an electrical signal to facilitate leakage current detection through the ZCT in case of leakage current due to overcurrent, short circuit, short circuit, etc., thereby preventing fire, device damage and electric shock. An object of the present invention is to provide a circuit breaker having a magnetic core capable of doing so.

Another object of the present invention is to limit the use time and the range of use at high current by constructing the core of an image current transformer (ZCT) built in an earth leakage circuit breaker with nanocrystalline alloys, amorphous alloys, ferrites, and metal cores with excellent magnetic properties. By providing a semi-permanent magnetic property without this, it is possible to extend the life of the earth leakage breaker, and to provide an earth leakage breaker having a magnetic core that can improve the operation performance.

According to a preferred embodiment of the present invention, a circuit breaker having a magnetic core includes: a power supply unit supplying power from a power supply source to a circuit breaker and a load unit; A load part in which power supplied from the power supply part is consumed; A wire connected from the power supply unit to the load unit penetrates and detects a leakage current generated by an overcurrent, an electric leakage, or a short circuit through an image current transformer (ZCT) including one of nanocrystalline alloys, amorphous alloys, ferrites, and metal cores. Leakage current detection unit for transmitting to the electronic circuit unit; Receives and amplifies the current value detected from the ground fault detecting unit, and compares the amplified current value with a predetermined reference value to continue supplying power to the load unit if the reference value is less than the reference value, and if it is above the reference value, trip coil An electronic circuit unit generating a control signal for driving and transmitting the control signal to the trip coil unit; A trip coil part receiving a control signal from the electronic circuit part and driving a trip coil according to the control signal; As the trip coil of the trip coil part is driven, the opening / closing mechanism is tripped in conjunction with the trip coil, and as the opening / closing mechanism is tripped, the opening / closing switch connected to the opening / closing mechanism is turned off to be supplied from the power supply part to the load part. An opening and closing mechanism to cut off power; A display unit which is formed on an upper side of the earth leakage breaker outside and displays a state of the earth leakage breaker according to a state of an open / close switch of the switch unit; Characterized in that it comprises a test unit for confirming the normal operation of the earth leakage breaker through a test switch formed on the upper side of the external leakage breaker.

In addition, the electronic circuit portion of the present invention and the amplifier for receiving and amplifying the current value detected from the earth leakage detector; A comparison unit for comparing the amplified current value with a reference current value which is a predetermined reference value and outputting the result to a control unit; If the detected current value is less than the reference value according to the comparison result received from the comparison unit, and maintains the current state of supplying power to the load, and if it is above the reference value control signal for driving the trip coil It is characterized by consisting of a control unit for generating and transmitting to the trip coil unit.

In addition, the core of the image current transformer (ZCT) of the leakage current detection unit of the present invention is composed of any one of a nanocrystalline alloy core, an amorphous alloy core, a ferrite core, a metal core, the material of the nanocrystalline alloy core is iron-based nanocrystalline alloy The material of the amorphous core is any one of cobalt-based and iron-based, the material of the ferrite core is any one of Ni-Zn-based, Ni-Cu-Zn-based, Mg-Zn-based ferrite, the material of the metal core Permalloy (Supermalloy), Supermalloy (Supermalloy), Mo Permalloy, characterized in that any one of Sendust, Iron powder, Si-steel.

In addition, the iron-based nano-crystalline alloy system of the present invention is any one of Fe-Si-B-Nb-Cu-based, Fe-Zr-B-based, the cobalt-based is Co-Fe-Si-B-based, the iron-based It is characterized in that the Fe-Si-B system.

Hereinafter, a circuit breaker having a magnetic core according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing an external configuration of a general earth leakage breaker, Figure 2 is a perspective view showing the internal configuration of the earth leakage breaker according to an embodiment of the present invention, Figure 3 is an interior of the earth leakage breaker according to an embodiment of the present invention A block diagram showing the configuration. In addition, Figure 4 is a perspective view showing an image transformer (ZCT) according to an embodiment of the present invention.

1 to 4, the earth leakage breaker 1 having a magnetic core according to an embodiment of the present invention includes a power supply unit 10, a load unit 20, a leakage current detection unit 30, and an electronic circuit unit ( 40), trip coil part 50, opening / closing mechanism part 60, display part 70, and test part 80.

The function of each technical means constituting the earth leakage breaker having the magnetic core is as follows.

The power supply unit 10 receives power from a power supply source and supplies the electric leakage breaker 1 and a load unit, and is connected to the earth leakage breaker 1 through a power supply side connection terminal 11.

The load unit 20 is connected to the earth leakage breaker 1 through the load-side connection terminal 21, and receives power from the power supply unit 10 through the earth leakage breaker 1, and consumes electricity. Refers to electrical appliances that operate by

The leakage current detector 30 detects a leakage current generated by an overcurrent, an electric leakage, a short circuit, etc. through the image current transformer (ZCT) 31. The image current transformer (ZCT) 31 is a nano-crystal alloy, The core 311 is formed of any one of an amorphous alloy, a ferrite, and a metal core, and a circular image current transformer hole 313 is formed at a central portion thereof, and the load unit 20 is formed in the image current transformer hole 313 by the power supply unit 10. Penetrate the wires connected by). At this time, a magnetic field is generated in the image current transformer (ZCT) 31 due to a current flowing through the wire passing through the current transformer hole 313. The magnetic fields generated in the ZCT 31 cancel each other in normal cases, but when a leakage current occurs due to an overcurrent, a short circuit, or a short circuit, the core 311 of the ZCT 31 is generated. A strong magnetic field is generated due to the leakage current, so that a voltage is induced in the coil 312 surrounding the core 311 to detect the leakage current through the image current transformer (ZCT) 31. Herein, the material of the nanocore is iron-based nanocrystalline alloy, the material of the amorphous core is any one of a cobalt-based alloy and an iron-based alloy, and the material of the ferrite core is Ni-Zn-based, Ni-Cu-Zn-based, Mg- One of Zn-based ferrites is most preferable, but ferrite containing Mn can be used. In addition, the material of the metal core is Permalloy (Ni-Fe alloy of Ni content of 78.5%), Supermalloy, Mo Permalloy (79% Ni, 79% Mo content 5%, Mn content 0.5%, Fe content 15.5%), Sendust, Iron powder, Si-steel is most preferred, but in order to improve the high-frequency characteristics mumetal (Mumetal: Ni content 79%, Cr Content 1.5%, Cu content 5%, Fe content 14.5%) may be used as the constituent material. In addition, magnetic saturation occurs even at low currents of the soft magnetic material, such as the nanocrystalline alloys, amorphous alloys, ferrites, and metal cores.

The electronic circuit unit 40 receives and amplifies the current value detected from the ground fault detecting unit 30 and generates a control signal by comparing with a predetermined reference value. The amplifier 41 is the ground fault detecting unit 30. The current value detected from the signal is transmitted, the current value is amplified and output to the comparator, and the comparator 42 inputs the amplified current value received from the amplification part 42 and transmitted to a predetermined reference current. Compared to the value and outputs the result to the control unit, the control unit 43 is the load when the detected current value is less than the reference current value of the reference value according to the comparison result received from the comparison unit 42 and received To maintain the current state of supplying power to the unit, if it is above the reference value generates a control signal for driving the trip coil to cut off the power supplied to the load unit The transmission part ripko.

The trip coil unit 50 receives a control signal from the electronic circuit unit 40 and drives the trip coil 51 according to the control signal.

When the trip coil 51 of the trip coil part 50 is driven, the opening and closing mechanism part 60 trips with the trip coil 51 in conjunction with the trip coil 51, and the opening and closing mechanism 61 is tripped. As the opening and closing switch 62 connected to the opening and closing mechanism 61 is turned off to cut off the power supplied from the power supply unit 10 to the load unit (2). The opening and closing switch is formed to protrude to the upper side of the earth leakage breaker (1) outside is possible manual operation.

The display unit 70 is formed on the upper side of the earth leakage breaker 1 outside to display the state of the earth leakage breaker according to the state of the open / close switch 61 of the open / close device unit 60.

The test unit 80 is for checking whether the ground fault circuit breaker 1 is normally operated, and forms a test button 81 and a test switch 82 inside the upper side of the ground fault circuit breaker 1, When the test button 81 is pressed, the test switch 82 is turned on so that a part of the current flowing from the power supply unit 10 to the load unit 20 is forcibly grounded without passing through the load unit 20. By flowing in, it is possible to check whether the ground fault vehicle short term (1) is operating normally.

5 is an internal circuit diagram of an earth leakage breaker according to an exemplary embodiment of the present invention.

Hereinafter, the operation principle of the earth leakage breaker will be described with reference to FIG. 5. As shown in FIG. 5, the earth leakage breaker is installed between the power supply unit 10 and the load unit 20 and receives a positive (+) line. And a ground (-) line; A test switch 80 configured to connect the positive (+) line and the ground (-) line, and a current limiting resistor (R1) to test whether the earth leakage circuit breaker operates normally; ; An image current transformer (ZCT) 31 for detecting a leakage current; An electronic circuit unit 40 which amplifies the current value detected by the image current transformer (ZCT) 31 and generates a control signal for controlling the trip coil by comparing with a reference current value which is a predetermined reference value; An opening / closing switch (62) which cuts off the power supply by turning off the plus (+) line and the ground (−) line, respectively; A trip coil 51 driven according to a control signal of the electronic circuit unit 40 to turn off the opening / closing switch 62.

The power supply unit 10 and the load unit 20 are connected in series through a wire passing through the image current transformer (ZCT) 31, and the current supplied from the power supply unit 10 is connected through a positive (+) line. It passes through the image transformer (ZCT) 31, passes through the load unit 20, and passes through the image transformer (ZCT) 31 again and flows to the ground (-) line. Accordingly, a magnetic field is generated in the image current transformer (ZCT) 31 due to the current flowing in the positive (+) line and the ground (−) line. The magnetic fields generated in the image current counter cancel each other when the circuit is normal, but when the leakage current occurs in the load unit 20 due to overcurrent, short circuit, short circuit, etc., the amount of current flowing through the ground (-) line decreases. The amount of current flowing in the positive (+) line and the ground (-) line is different, causing a strong magnetic field in the image current transformer (ZCT) 31. Therefore, the image current transformer (ZCT) 31 detects this and transmits it to the electronic circuit unit 40. The electronic circuit unit 40 amplifies the detected signal transmitted from the image current transformer (ZCT) 31, and amplifies it, compares the amplified current value with a predetermined reference value, and supplies power when the current value is higher than the reference value. To generate a control to generate a control to drive the trip coil 51, the trip coil 51 is driven in accordance with the control signal of the electronic circuit unit 40 to the positive (+) line and the ground (-) line, respectively The power supply is interrupted by turning off the open / close switch 62. Through the above process, when the leakage current occurs due to overcurrent, short circuit, short circuit, etc., the power supplied to the load unit 20 is cut off to prevent fire, device damage and electric shock.

When the user turns on the test switch 82 of the test unit 80 to check whether the earth leakage breaker operates normally, a part of the current flowing from the power supply unit 10 to the load unit 20 is turned on. By forcibly flowing to the ground (-) line without passing through the load unit 20, by varying the amount of current flowing in the positive (+) line and the ground (-) line to operate the earth leakage breaker. The resistor R1 is for limiting the current.

The appearance of the embodiment of the ground fault circuit breaker described above is only one embodiment, and the ground fault circuit breaker having the same configuration and operation may be modified and changed by the person skilled in the art. It is not limited to the embodiment and the accompanying drawings.

In addition, as described above, various substitutions, modifications, and changes can be made by those skilled in the art without departing from the technical spirit of the present invention. It is not limited.

As described above, the earth leakage breaker having the magnetic core according to the present invention has the following effects.

First, the present invention comprises a core of an image current transformer (ZCT) built in an earth leakage circuit breaker composed of nanocrystalline alloys, amorphous alloys, ferrites, metal cores and the like having excellent magnetic properties. When the leakage current is generated due to overcurrent, short circuit, short circuit, or the like, the leakage current can be easily detected through the current transformer ZCT, thereby preventing fire, device damage, and electric shock.

Second, the present invention is composed of nanocrystalline alloys, amorphous alloys, ferrites, metal cores, etc., which have excellent magnetic properties, with the core of an image current transformer (ZCT) built in an earth leakage circuit breaker, without limiting the use time and the use range at a high current. By enabling the semi-permanent magnetic characteristics, it is possible to extend the life of the earth leakage breaker and improve the operating performance.

Claims (4)

In the earth leakage breaker having a magnetic core, A power supply unit for supplying electric power from the power supply to the earth leakage breaker and the load unit; A load part in which power supplied from the power supply part is consumed; A wire connected from the power supply unit to the load unit penetrates and detects a leakage current generated by an overcurrent, an electric leakage, or a short circuit through an image current transformer (ZCT) including one of nanocrystalline alloys, amorphous alloys, ferrites, and metal cores. Leakage current detection unit for transmitting to the electronic circuit unit; Receives and amplifies the current value detected from the ground fault detecting unit, and compares the amplified current value with a predetermined reference value to continue supplying power to the load unit if the reference value is less than the reference value, and if it is above the reference value, trip coil An electronic circuit unit generating a control signal for driving and transmitting the control signal to the trip coil unit; A trip coil part receiving a control signal from the electronic circuit part and driving a trip coil according to the control signal; As the trip coil of the trip coil part is driven, the opening / closing mechanism is tripped in conjunction with the trip coil, and as the opening / closing mechanism is tripped, the opening / closing switch connected to the opening / closing mechanism is turned off to be supplied from the power supply part to the load part. An opening and closing mechanism to cut off power; A display unit which is formed on an upper side of the earth leakage breaker outside and displays a state of the earth leakage breaker according to a state of an open / close switch of the switch unit; An earth leakage circuit breaker having a magnetic core, characterized in that it comprises a test unit for confirming whether the earth leakage circuit breaker operates normally through a test switch formed on the upper side of the earth leakage circuit breaker. The method of claim 1, The electronic circuit unit and the amplifier for receiving and amplifying the current value detected from the ground fault detection unit; A comparison unit for comparing the amplified current value with a reference current value which is a predetermined reference value and outputting the result to a control unit; If the detected current value is less than the reference value according to the comparison result received from the comparison unit, and maintains the current state of supplying power to the load, and if it is above the reference value control signal for driving the trip coil A circuit breaker having a magnetic core, characterized in that the control unit for generating and transmitting to the trip coil portion. The method of claim 1, The core of the image current transformer (ZCT) of the leakage current detection unit is composed of any one of a nanocrystalline alloy core, an amorphous alloy core, a ferrite core, and a metal core. The material of the nanocrystalline alloy core is iron-based nanocrystalline alloy, The material of the core is any one of cobalt-based and iron-based, the material of the ferrite core is any one of Ni-Zn-based, Ni-Cu-Zn-based, Mg-Zn-based ferrite, the material of the metal core is Permalloy , Supermalloy, Mo permalloy, earth leakage breaker having a magnetic core, characterized in that any one of the iron powder, Si-steel. The method of claim 3, wherein The iron-based nano-crystalline alloy system is any one of Fe-Si-B-Nb-Cu-based, Fe-Zr-B-based, the cobalt-based is Co-Fe-Si-B-based, the iron-based is Fe-Si- An earth leakage breaker having a magnetic core, characterized in that the B-based.

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