KR101071920B1

KR101071920B1 - Slim Type Overload and Earth Leakage Circuit Breaker

Info

Publication number: KR101071920B1
Application number: KR1020100004074A
Authority: KR
Inventors: 김주철
Original assignee: 상도전기통신 주식회사
Priority date: 2010-01-15
Filing date: 2010-01-15
Publication date: 2011-10-10
Also published as: KR20110084039A

Abstract

DETAILED DESCRIPTION The present invention discloses a slim overload and earth leakage circuit breaker for installation in a limited number of distribution boards as needed.
The present invention is to reduce the width of the PCB that is connected to the two phases for driving the trip bar embedded in the circuit breaker and the magnetic coil operating when the short circuit occurs and the width of the PCB can be significantly reduced. will be. To this end, the present invention by distributing one or two coils and a magnetic coil for driving the trip bar on the PCB with the core based on the trip bar, so that the width of the PCB can be significantly reduced, resulting in a case than the conventional This is to reduce the width of about 1/2. In this way, the present invention can be miniaturized, can be installed in any space, and the manufacturing cost can be reduced.

Description

Slim Type Overload and Earth Leakage Circuit Breaker}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slim overload and earth leakage circuit breaker, and more particularly, to a slim overload and earth leakage circuit breaker for installation in a limited number of distribution boards.

1 illustrates a structure of a general circuit overload and an earth leakage circuit breaker. As can be seen, the magnetic field is formed by the coil 102 of the outer periphery of the magnet coil 101 during the short-circuit current energization by additionally winding the coil 102 of the outer periphery when the short-circuit current is energized. As the 103 is attracted, the trip bar 104 is pulled so that the cross bar 105 is raised and the movable contact 106 is turned off.

Such a circuit breaker often generates a case in which the coil 102 wound around the magnet coil 101 generates heat and damages the magnet coil 101. The coil 102 wound around the magnet coil 101 may be a coil 102. Since the number of turns is limited and the magnetic force is not strong enough, the rapid operation is difficult.

In addition, since the core 103 having a smaller diameter is installed at the center of the magnet coil 101, the resistance of the core 103 is increased, and thus, the sliding operation of the core 103 due to the magnetic force is slow. . In addition, when a short circuit does not occur between two wires and only occurs in one phase, the conventional small circuit breaker has an instantaneous portion only in one phase, so when a short-circuit current flows in a phase without instantaneous function, the breaker does not function instantaneously, causing damage and fire. I have a problem.

Therefore, the present applicant has proposed the Republic of Korea Patent Registration No. 0823528 (name of the invention: a compact circuit breaker for overload and short circuit protection; referred to as "quotation of the invention"), which is shown in Figures 2 to 4.

As can be seen from this, the cited invention is provided with a connection terminal 211 and a power line on both sides of the circuit breaker body 210, the movable contact of the fixed contact 213 and the lead 215 by the overload and short circuit protection ( The bimetal 214 blocking the 216 is installed, and the lever 221 and the crossbar 222 are disposed under the handle 220 so that the fixed contact 213 and the movable contact 216 are turned on or off by lifting the lid 215. ) Is installed, the trip bar 217 is installed in front of the handle 220 is operated by the operation of the core 218, the locking piece 229 of the core 218 is a locking groove of the trip bar 217 In the known overload and short-circuit protection small leakage circuit breaker having a case 240 fixed to 219, and coupled to the outside of the breaker body 210,

The PCB 224 is fixed to the front of the trip bar 217, and the first and second guide pipes 226 corresponding to the two power lines 237 are fixed to the PCB board 224 and the first and second guides. The core 218 is installed to allow two coils 225 to be wound on the outside of the pipe 226 and to fix the spring 227 inside the first and second guide pipes 226. This cited invention can provide a circuit breaker capable of breaking a small and large short-circuit current by quickly operating the trip bar because a strong magnetic field is applied with the magnetic resistance minimized by a coil installed at the position closest to the two cores. In addition, the device can be safely protected by overload and short circuit protection of the power line, and the electric shock can be prevented due to short circuit.The core can be operated by two coils to freely connect the power line. It can be, there is a useful effect to be able to prevent the burner of the breaker and the occurrence of fire caused by the arc generated by the extinguishing device and the insulating plate inside the breaker.

On the other hand, the cited invention has a structure in which two coils 225 and one magnetic coil 231 are arranged horizontally on the PCB 224 to drive the trip bar 217, and thus the PCB 224 As a result, it is difficult to reduce the width of the case 240 as compared to the conventional one, and in recent years, the number of installation of the earth leakage breaker is increasing rapidly due to the rapid increase of the power equipment according to the advanced design of the building. As the number increases, not only the difficulty of separately manufacturing switchboards corresponding to the increased volume is generated, but also the installation space is restricted and needs improvement.

Republic of Korea Patent No. 0831528 (Invention name: Small circuit breaker for overload and short circuit protection)

The purpose of the present invention is to reduce the width of the PCB in which the coil operated when overloaded and the magnetic coil operated when a short circuit occurs in order to drive a trip bar embedded in the circuit breaker according to this need so that the width can be greatly reduced. To provide a compact overload and ground fault circuit breaker.

In order to achieve this object, the present invention distributes one or two coils and magnetic coils together with a core based on a trip bar, so that the width of the PCB can be greatly reduced, and as a result, the width of the case is 1 compared to the conventional one. We propose an overload and ground fault circuit breaker designed to be reduced by a factor of two.

In this way, the present invention can be slimmed down by greatly reducing the width of the breaker, so that the double-loaded circuit breaker can be installed on the same volume of the switchboard in the same volume, so that the circuit board is not restricted by the installation space of the switchboard. It can be installed in any space, it is possible to reduce the manufacturing cost.

In addition, the present invention can reduce the volume and weight of the circuit breaker to facilitate the manufacturing process or packaging, transportation and installation work,

When the circuit breaker according to the present invention is installed in the moving object, there is an effect that can contribute to the weight reduction of the total weight.

1 is a cross-sectional view showing a conventional general circuit breaker.
Figure 2 is a cross-sectional view showing a state before the breaker of the breaker according to the invention.
Figure 3 is a cross-sectional view showing a state after the blocking of the breaker by the invention cited.
Figure 4 is an exploded perspective view showing the configuration of the breaker according to the present invention.
Figure 5 is a perspective view showing the appearance of the circuit breaker according to the present invention.
Figure 6 is an exploded perspective view showing the main portion of the breaker according to the present invention.
Figure 7 is a cross-sectional view showing a state before the breaker of the breaker according to the present invention.
Figure 8 is a cross-sectional view showing a state after the blocking of the circuit breaker according to the present invention.
Figure 9 is an exploded perspective view showing an embodiment of two coils in the breaker according to the present invention.
Figure 10 is an exploded perspective view of another embodiment showing a state in which the position of the coil and the magnetic coil is inverted according to the present invention.
Figure 11 is an exploded perspective view showing an embodiment of two coils in the present invention shown in FIG.
12 is a cross-sectional view showing another embodiment of the present invention.

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

First, the appearance of the breaker according to the present invention is shown in Figure 5,

The overall configuration of a specific embodiment according to the present invention is shown in FIG. As can be seen from this, in the present invention, the connection terminal 11 and the power line 37 are installed on both sides of the breaker main body 10, and the fixed contact 13 and the lead 15 are protected by overload and short circuit protection. The bimetal 14 to block the movable contact 16 is installed, and the lever 21 and the lower portion of the handle 20 are turned on or off so that the fixed contact 13 and the movable contact 16 are turned on or off by lifting the lid 15. The crossbar 22 is installed, and the trip bar 17 is installed in front of the handle 20 and operates by operation of the core 18, and the engaging piece 29 of the core 18 is installed in the trip bar 17. In the known overload and earth leakage breaker having a case 40 fixed to the engaging groove 19 of the, and coupled to the breaker body 10 outside,

The PCB 24 is fixed to the front of the trip bar 17, the guide tube 26 is fixed to the PCB 24 described above, and the coil 25 is wound around the outer circumference of the guide tube 26. In addition, the core 18 is coupled to the inside of the guide tube 26 to allow the above-described core 18 to slide, and the magnetic coil 31 which is operated at the time of the short circuit is disposed below the trip bar 17 and at the same time the core of the magnetic coil 31. The locking piece 29 'formed at the 18' is intended to be coupled to the locking groove 19 'formed below the trip bar 17.

In the present invention, as shown in FIG. 7, the lever 21 installed at the lower side by operating the handle 20 pushes the crossbar 22 downward so as to lower the lid 15. The fixed contact 13 and the movable contact 16 of the lead 15 come into contact with each other to be in an energized state. The current of the energized power line 37 is the bimetal 14 and the lead 23 connected to the lead 15. ), The coil 25 and the output side connecting terminal 36, and flows to the load side of the motor, home appliances, etc. connected thereto. Due to the excessive current flows, a strong magnetic field is generated by the coil 25 wound on the outside of the guide tube 26. As a result, the core 18 provided to slide inward of the guide tube 26 is sucked and retracted while compressing beyond the elastic force of the spring 27. The retraction of the core 18 acts as a pulling force of the trip bar 17 by the engaging piece 29 formed in the locking groove 19 of the trip bar 17, and is coupled to the bottom of the trip bar 17. As the crossbar 22 is raised by flipping the lever 21, the pressurized state of the lid 15 is released, and the lid 15 is raised to move the movable contact 16 away from the fixed contact 13.

Accordingly, by cutting off the current flowing into the power line 37, it is possible to protect the device or the power line and to prevent serious accidents such as a fire caused by the continuous flow of excessive current. Seemed.

In the present invention, in particular, the coil 25 that is operated when the current flowing in the power line 37 is excessive and the magnetic coil 31 that is operated when a short circuit occurs is installed separately from the upper side and the lower side, unlike the cited invention, the PCB 24 By reducing the width of about 1/2, the width of the main body 10 and the case 40 of the circuit breaker can be halved as a result.

In addition, in the present invention, as the coil 25 and the magnetic coil 31 are separately installed, even though the two coils 25 and 25 'are connected to two power lines in series, as shown in FIG. The width can be reduced sufficiently. Therefore, as well as slimming the circuit breaker, and in most cases when excessive current is generated, the two coils 25 are operated at the same time, so that a quick break is possible when excessive current is generated, thereby reducing various damages caused by a short circuit accident. .

In addition, according to the present invention, two coils 25 connected to each power line 37 may be installed to freely connect the power lines 37 without distinguishing the heart lines, and the two power lines 37 may be used. Even if overload and short-circuit protection occurs in any one of the power lines 37 will be able to block it.

In addition, when a short circuit occurs due to various factors such as electric shock or flooding while the circuit breaker is in operation, a potential generated in an unbalanced state by ZCT not shown in the drawing is output from the comparative amplifier, and accordingly, the driving unit is applied to the magnetic coil 31. Since a current flows through the core 18 ′, the engaging piece 29 ′ formed in the core 18 ′ pulls the engaging groove 19 ′ formed below the trip bar 17, thereby tripping the trip bar ( 17) the lower end is attracted to the magnetic coil 31 side.

Accordingly, the trip bar 17 is different from the conventional breaker that the upper end of the pull bar is pulled so that the lever 21 coupled to the bottom of the trip bar 17 is pulled out so that the cross bar 22 is raised. The pressurized state of 15 is released, and the lid 15 is raised so that the movable contact 16 is separated from the fixed contact 13.

Accordingly, by blocking the current drawn into the power line 37 so that the short-circuit state is cut off, it is possible to protect the facility or human life.

In addition, in the present invention according to the embodiment described above was shown an example in which a coil operated by an excessive current is installed above and a magnetic coil operated by a leakage current is installed below, on the contrary, a magnetic coil is installed and installed upward. Coils may be installed in this embodiment, which is illustrated in FIG. 10. In this embodiment, the connecting terminal 11 and the power line 37 are installed at both sides of the breaker main body 10, and the fixed contact 13 and the movable contact 16 of the lead 15 are blocked by overload and short circuit protection. The bimetal 14 is installed, and the lever 21 and the crossbar 22 are installed under the handle 20 so that the fixed contact 13 and the movable contact 16 are turned on or off by lifting the lid 15. A trip bar 17 is installed at the front of the handle 20 and operated by the operation of the core 18, and the engaging piece 29 of the core 18 is disposed in the engaging groove 19 of the trip bar 17. In the known overload and earth leakage breaker having a case 40 fixed and coupled to the outside of the breaker body 10,

The PCB 24 is fixed to the front of the trip bar 17, and the magnetic coil 31 installed at the time of short circuit is installed therein,

The PCB is further installed below the trip bar 17, and the guide tube 26 is fixed thereto, the coil 25 is wound around the outside of the guide tube 26, and the inside of the guide tube 26 is coupled to the guide tube 26. The above-described core 18 'is allowed to slide, but the engaging piece 29' formed in the core 18 'is coupled to the engaging groove 19' formed below the trip bar 17.

In the present embodiment, the trip bar 17 can be driven by the upper magnetic coil 31 and the lower coil 25, and thus the same operation as in the above-described embodiment is possible.

In addition, in this embodiment, as shown in FIG. 11, the coil installed below is provided with two guide tubes, two coils, and one core installed below the PCB, respectively, and engaging pieces formed on two cores 18 '. The 29 'is coupled to the two locking grooves 19' formed below the trip bar 17, respectively, so that the current can be cut off more quickly when excessive current is generated.

In addition, in the aforementioned various embodiments, as shown in FIG. 12, the spring 27 is inserted into and fixed to the inside of the guide tube so that the spring 27 is sucked by the coil 25 or the magnetic coil 31 and then moved to its original position. By allowing the cores 18 and 18 'to return to the position set by the elasticity of the spring, more smooth operation can be achieved.

In addition, the present invention is not limited to the above-described embodiments, and various elements known in the gist and concept of the present invention may be added and combined to change in various forms.

10: Circuit breaker main body 11: Connection terminal 13: Fixed contact
14: bimetal 15: lead 16: movable contact
17: Tripbar 18, 18 ': Core 19, 19': Hanging groove
20: handle 21: lever 22: crossbar
23: conductor 24: PCB 25, 25 ': coil
26: guide 27: spring 29, 29 ': locking piece
31: magnetic coil 36: connector 37: power line
40: case

Claims

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Connection terminals and power lines are installed on both sides of the circuit breaker body, and bimetals are installed to block the fixed contact and the movable contact by the lead by overload and short circuit protection, and the lower contact of the handle is turned on or off by lifting the lead. A known overload with a case in which a lever and a crossbar are installed in front of the handlebar, and a trip bar installed in front of the handle is operated by operation of the core, and a locking piece of the core is fixed to the locking groove of the trip bar and coupled to the outside of the breaker body. And a circuit breaker,
Fixing the PCB in front of the trip bar, fixing the guide tube to the PCB, winding the above-described coil around the outer periphery of the guide tube, coupled to the inside of the guide tube to allow the above-mentioned core to slide, operation during a short circuit The magnetic coil is separated from the above-described PCB and disposed below the trip bar, and at the same time, the engaging piece formed in the core of the magnetic coil is coupled to the engaging groove formed below the trip bar.
The coil is installed on the PCB is wound separately separated in two guide tubes and the above-described coil is a thin overload and earth leakage circuit breaker, characterized in that connected to two power lines in series.

Connection terminals and power lines are installed on both sides of the circuit breaker body, and bimetals are installed to block the fixed contact and the movable contact by the lead by overload and short circuit protection, and the lower contact of the handle is turned on or off by lifting the lead. A known overload with a case in which a lever and a crossbar are installed in front of the handlebar, and a trip bar installed in front of the handle is operated by operation of the core, and a locking piece of the core is fixed to the locking groove of the trip bar and coupled to the outside of the breaker body. And a circuit breaker,
Fix the PCB in front of the trip bar, and install a magnetic coil that is activated when the short circuit,
The PCB is further installed below the trip bar, the guide tube is fixed thereto, the coil is wound around the outside of the guide tube, and the inside of the guide tube is coupled to allow the above-described core to slide, but the engaging piece formed on the core trips. Slim type overload and earth leakage circuit breaker, characterized in that to be coupled to the engaging groove formed in the lower bar.

The method according to claim 3,
Two guide tubes, a coil, and two cores installed below the PCB, respectively, and two overhangs and a short circuit are characterized in that the engaging pieces formed on the two cores are respectively coupled to the two engaging grooves formed below the trip bar. Combined circuit breaker.

The method according to any one of claims 2 to 4,
Slim type, characterized in that by inserting and fixing the spring inside the above-described guide tube is inserted into it so that the core that is sucked by the coil or the magnetic coil to move to the original position to return to the position set by the spring elasticity Overload and short circuit breaker.