KR102367112B1 - circuit breaker for extinguishing arc - Google Patents

Abstract

The present invention relates to a vacuum pancreatic breaker.
In the present invention, by integrating two vacuum circuit breakers in a symmetrical structure, in particular, switching switching and arc discharge can be extinguished for both power sources of the circuit through vacuum insulation. It provides a vacuum transfer circuit breaker that enables miniaturization and weight reduction of the circuit breaker by minimizing the contact distance.

Description

vacuum transfer breaker {circuit breaker for extinguishing arc}

The present invention relates to a circuit breaker, and in particular, a vacuum transfer breaker capable of dissipating transfer switching and arc flash for both power sources through vacuum insulation (hereinafter referred to as 'SOHO'). is about

In general, a circuit breaker is an electrical protection device that protects load devices and lines from fault currents in the event of an accident such as a short circuit or a ground fault occurring in an electrical circuit. (Trip, Open) to cut the current.

Some of these circuit breakers have an exposed control device, so they are used as switches as well as circuit breakers for circuit protection.

Depending on the extinguishing medium, air circuit breaker (ACB) using air as the extinguishing medium, vacuum circuit breaker (VCB) using the dielectric strength of vacuum, and oil circuit breaker using oil as extinguishing medium (Oil Circuit) Breaker, OCB), gas circuit breaker using inert hexafluoride (SF ₆ ) gas, and magnetic circuit breaker (MCB) using magnetism.

Among them, air circuit breaker, vacuum circuit breaker, and gas circuit breaker are used in a wide range of applications, and the insulation ability of the circuit breaker, that is, the extinguishing ability, is in the order of vacuum circuit breaker, gas circuit breaker, and air circuit breaker. 12kv, 24kv), gas circuit breaker is used for 24kv high voltage, and air circuit breaker is used for low voltage.

On the other hand, the vacuum circuit breaker mainly plays the role of power transport control and protection of the power system. It has a large breaking capacity, high reliability and safety, and can be mounted in a small installation space. The vacuum valve (Vacuum Interrupter, VI) used as a key part is expensive, and the contact pressure of the contact must be stronger than other circuit breakers, so the actuator must be large. The downside is that it is expensive. Therefore, a vacuum valve or gas tank is not required and relatively inexpensive air breaker (ACB) and air transfer switch (ATS) are commonly used as they are exposed to the air and used.

However, the existing air circuit breaker (ACB) and air positive power transfer switch (ATS) are of the type to open and close in the air when closing and opening. If the interruption fails, there is a risk of explosion due to the arc, and since the contact point is exposed to the air, the minimum separation distance of the contact point is reduced by dust or moisture in the air, and there is a risk that the insulation may be easily destroyed. There is a problem that is not suitable for application to chemical complexes or enclosed places.

In addition, with the exception of the existing air-to-air power transfer switch, two air circuit breakers are installed as a group, and an interlock device is installed and used outside, which requires a lot of space. When inrush current occurs, there is also a problem in that an arc chamber must be provided to prevent damage due to overcurrent.

KR 10-0423223 B1 (2004.03.04.) KR 10-0502841 B1 (2005.07.13.) KR 10-0687653 B1 (2007.02.21.) KR 10-0808927 B1 (2008.02.25.)

Accordingly, the present inventor comprehensively considers the above-mentioned matters, and focuses on solving the limitations and problems of the existing air circuit breaker, vacuum circuit breaker, and air positive power transfer switch, and can omit the arc chamber essential for the air circuit breaker. In order to develop a vacuum transfer circuit breaker with a new structure, it is possible to reduce the size and weight due to the short contact distance and simple operation structure, maintain high reliability and long life with a low leakage rate, and have a large-capacity interruption function when opening and closing a load. The present invention was created as a result of continuous research with great effort.

Therefore, the technical problem and object to be solved by the present invention is to replace the conventional positive air power transfer switch or integrate two air circuit breakers in a vertically symmetrical structure to replace the function performed by two existing units with one, and The purpose of this is to provide a vacuum circuit breaker that can be extinguished through vacuum insulation that can reduce the contact distance by

Here, the technical problems and objects to be solved by the present invention are not limited to the technical problems and objects mentioned above, and other technical problems and objects not mentioned will be clearly understood by those skilled in the art from the following description.

The vacuum switch circuit breaker according to the present invention for achieving the above object suggests that two vacuum circuit breakers each having a vacuum valve are integrated in a vertical symmetrical structure.

In addition, the vacuum transfer circuit breaker according to the present invention can be implemented to minimize the driving moment by implementing the input spring of the circuit breaker in a worm gear contraction method.

In addition, the vacuum valve in the vacuum transfer circuit breaker according to the present invention is compact as it has a large current carrying capacity compared to the size of the conventional braided wire or thin plate lead wire even when a large amount of current is passed by installing a ring-shaped contactor on the input conductor. It is easy to assemble and concise in its structure, so it provides a shape that is advantageous for temperature rise, etc.

In addition, the vacuum transfer circuit breaker according to the present invention is provided with two actuators and two input springs to open and close both power sources, and by arranging the two actuators symmetrically instead of vertically, the space of the actuator is reduced to reduce the overall size of one circuit breaker. can be miniaturized with

As described above, the present invention can omit the arc chamber that is essential for both the air power transfer switch and the air circuit breaker, and has the effect of providing a lightweight switch by integrating the two circuit breakers into a vertically symmetrical structure.

In addition, the present invention can maintain high reliability and lifespan as long as possible with a low leakage rate as well as miniaturization and weight reduction of the circuit breaker by applying advanced contact and insulation technology to the vacuum valve, and the spring input method is implemented as a worm gear compression method. This has the effect of minimizing the driving moment.

In addition, the present invention can minimize the contact distance by the vacuum valve, while sealing welding in a high vacuum state, it is not affected by the surrounding environment and the vacuum can be maintained for a long time, so that the vacuum life can be maintained for a long time.

In addition, the present invention has an effect of providing a structure capable of withstanding a short-circuit current and high electromagnetic force generated during a short-circuit by using the vacuum valve as an insulating tool.

In addition, the present invention has the advantage that the voltage level of the vacuum valve can be applied without changing the operating mechanism even when applied to a DC voltage circuit requiring a higher insulation distance than AC.

In addition, the present invention installs a contactor made of a ring in the upper and lower power input part of the vacuum valve to pass a large amount of current, but it has a sufficient current carrying capacity compared to the size of the conventional braided wire or thin plate lead wire, so it is easy to assemble with a compact structure It is easy and concise and has an effect characterized by having an advantageous shape for temperature rise and the like.

In addition, the present invention requires each driving manipulator and a closing spring to open and close both power sources, and by arranging the two manipulators symmetrically instead of up and down, the space of the driving manipulator is reduced, thereby reducing the overall size of the circuit breaker.

1 is a three-dimensional view of a vacuum circuit breaker that can be extinguished through vacuum insulation according to the present invention;
2 is a cross-sectional view of a vacuum transfer circuit breaker that can be extinguished through vacuum insulation according to the present invention shown in FIG. 1;
Figure 3 is a design diagram of a vacuum transfer circuit breaker capable of extinguishing through vacuum insulation according to the present invention shown in Figure 1;

Hereinafter, an embodiment according to the present invention will be described in more detail with reference to the accompanying drawings.

Prior to this, the terms described below are defined in consideration of the functions in the present invention, which indicate that they should be interpreted as concepts consistent with the technical spirit of the present invention and meanings commonly or commonly recognized in the art.

In addition, when it is determined that a detailed description of a known function or configuration related to the present invention may obscure the gist of the present invention, the detailed description thereof will be omitted.

The accompanying drawings show that parts are exaggerated or simplified for convenience and clarity of explanation and understanding of the configuration and operation of the technology, and it is revealed that each component does not exactly match the actual size and shape.

In addition, when it is said that a part includes a certain component, this means that other components may be further included, rather than excluding other components, unless otherwise stated.

Hereinafter, an embodiment of a vacuum switch-off circuit breaker capable of being extinguished through vacuum insulation according to the present invention will be described in detail with reference to the drawings.

1 is a three-dimensional view of a vacuum switch-off circuit breaker that can be extinguished through vacuum insulation according to the present invention, and FIG. 2 is a cross-sectional view of a vacuum switch-off circuit breaker that can be extinguished through vacuum insulation according to the present invention shown in FIG. 1 is a design drawing of a vacuum transfer circuit breaker that can be extinguished through vacuum insulation according to the present invention.

1 to 3 , the vacuum switch circuit breaker 100 according to the present invention includes a first vacuum circuit breaker 110 and a second vacuum circuit breaker 120 having a vertical symmetric structure, and the first vacuum circuit breaker 110 ) and the second vacuum circuit breaker 120, respectively, the first and second manipulators 130 and second for connecting or disconnecting power by opening and closing the internal contacts of the first vacuum valve 111 and the second vacuum valve 121, respectively. By receiving the driving force of the manipulator 140 and the first manipulator 130 and the second manipulator 140, the main contact points inside the first vacuum valve 111 and the second vacuum valve 121 are firmly bound, respectively. The first contact spring 113 and the second contact spring 123 are supplied to the first contact spring 113 and the second contact spring 123, and the first main power input terminal 101 supplied to the first vacuum breaker 110 and the second supplied to the second vacuum circuit breaker 120 The main power input terminal 103 and the first vacuum valve 111 or the second vacuum valve 121 connected or blocked by the output terminal 102 to which the first main power or the second main power is output; An insulating barrier 150 to which the first main power input terminal 101, the second main power input terminal 103, and the output terminal 102 are coupled, and a frame and a cradle 160 for integrally binding the components and providing mobility is composed The vacuum switch circuit breaker 100 that can be extinguished through vacuum insulation according to the present invention may further include a control auxiliary device 117 capable of controlling the first manipulator 130 and the second manipulator 140, respectively. there is.

The first vacuum circuit breaker 110 is connected to or spaced apart from the contact point by the first contact spring 113 operated under the control of the first manipulator 130 to electrically conduct and cut off. The first manipulator 130 performs a mechanism for connecting or disconnecting the first main power by opening and closing a contact inside the first vacuum valve 111 .

The first vacuum valve 111 for ON-OFF operation of the first main power, the first main power input conductor, the output conductor commonly connected to the second vacuum circuit breaker 120, and the main contact inside the first vacuum valve 111 The first contact spring 113 to be firmly bound constitutes a conductive part, and this conductive part is mounted inside the insulating barrier 150 to constitute a blocking part.

The second vacuum circuit breaker 120 is connected to or spaced apart from the contact point by the first contact spring 123 that operates under the control of the second manipulator 140 to conduct electricity and cut off the electrical current. The second manipulator 140 opens and closes a contact inside the second vacuum valve 121 to connect or disconnect the second main power source.

For ON-OFF operation of the second main power, the second vacuum valve 121, the second main power input conductor, the output conductor commonly connected to the first vacuum circuit breaker 110, and the main contact inside the second vacuum valve 121 are connected. The second contact spring 123 to be firmly bound constitutes a conductive part, and the conductive part is mounted inside the insulating barrier 150 to constitute a blocking part.

The first vacuum circuit breaker 110 and the second vacuum circuit breaker 120 have all structures in common except for each conductive part, a blocking part, and a manipulator. The first vacuum valve 111 and the second vacuum valve 121 are connecting devices for opening and closing the power circuit by configuring the blocking parts of the first vacuum circuit breaker 110 and the second vacuum circuit breaker 120, respectively, and a ceramic case of vacuum It consists of a contact contact inside and a stator and a mover that can open and close, and the mover has a structure that enables smooth operation by connecting the bellows to properly maintain the internal vacuum during operation.

The first manipulator 130 and the second manipulator 140 open and close the internal contacts of the first vacuum valve 111 and the second vacuum valve 121, respectively, to connect or disconnect power. The springs 115 and 125 and the worm gear capable of compressing the closing springs 115 and 125, the transmission motor driving the worm, the 3-fold link and cam driving the closing function, the blocking spring, and the main drive driving the VI It is composed of a control mechanism that can control the axis and operation operation.

The input springs 115 and 125 are provided in the first manipulator 130 and the second manipulator 140, respectively, and drive the first and second vacuum valves 111 and 121, respectively, in a compression method using a worm-gear. It recharges the mechanical energy that it can do. The mechanical energy charged from the closing (shrinking) springs 115 and 125 is transmitted to the first contact spring 113 and the second contact spring 123 through the movable rods 119 and 129 .

The first contact spring 113 and the second contact spring 123 are respectively installed at the ends of the movable parts of the first vacuum valve 111 and the second vacuum valve 121 to close the contacts inside the vacuum valves 111 and 121. It works when opening and closing, enabling quick separation of contacts when opening, and increasing the contact force of internal contacts of vacuum valves 111 and 121 with high pressure during closing to ensure reliable energization without temperature rise when energized. Reference numeral 112 of FIG. 3 denotes an insulating insulator for a contact, reference numeral 114 denotes a support for supporting the insulating barrier 150, and reference numeral 116 denotes a power terminal connection clip provided at the power input and output terminals.

As described above, the vacuum transfer circuit breaker capable of extinguishing through vacuum insulation according to the present invention replaces a conventional air transfer switch or integrates two air circuit breakers in a vertically symmetrical structure to perform the functions performed by two existing units into one. In addition to replacement, the contact distance can be minimized by the vacuum valve, making it possible to reduce the size and weight of the circuit breaker.

In addition, the vacuum switch circuit breaker that can be extinguished through vacuum insulation according to the present invention can maintain high reliability and life as long as possible with a low leakage rate as well as miniaturization and weight reduction of the circuit breaker by applying advanced contact and insulation technology to the vacuum valve, By implementing the spring input method as a worm gear contraction method, the driving moment can be minimized and a structure that can withstand short-circuit current and high electromagnetic force generated during short-circuit can be provided.

In addition, the vacuum switch circuit breaker that can be extinguished through vacuum insulation according to the present invention is hermetically welded in a high vacuum state so that the vacuum state can be maintained for a long time without being affected by the surrounding environment, so that the vacuum life can be maintained for a long time, and the insulation distance is higher than that of alternating current Even when applied to a required DC voltage circuit, the voltage level of the vacuum valve can be applied without changing the operating mechanism. Compared to shipbuilding or thin-plate lead wire, it has a generous current carrying capacity compared to its size, making it easy to assemble with a compact structure and concise, providing an advantageous shape for temperature rise.

On the other hand, although the detailed description of the present invention has been described in detail with reference to the preferred embodiment referenced by the accompanying drawings, it is needless to say that various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments and should be defined by the claims described below as well as the claims and equivalents.

100: vacuum transfer breaker
110: first vacuum circuit breaker 111: first vacuum valve
112: insulator for contact 113: first contact spring
114: support 115: input spring
116: power terminal connection clip 117: control auxiliary device
120: second vacuum circuit breaker 121: second vacuum valve
123: second contact spring 125: input spring
130: first manipulator 140: second manipulator
150: insulating barrier 160: frame and cradle

Claims (1)

In a vacuum transfer circuit breaker that integrates two vacuum circuit breakers in a vertically symmetrical structure,
A first vacuum circuit breaker 110 and a second vacuum circuit breaker 120 that are vertically symmetrically installed on the frame and cradle 160 and perform electrical conduction and blocking functions;
First and second vacuum valves 111 and 121 for installing a ring-shaped contactor to the input conductor of both power sources;
The first vacuum valve 111 and the second vacuum valve 121 respectively open and close the internal contacts to perform an operation mechanism that can connect or disconnect power, and the two first and second vacuums for opening and closing both power sources The input springs (115, 125) and the input spring ( 115, 125), a transmission motor that drives the worm, a three-bar link that drives the closing function, a cam, a shut-off spring, a main drive shaft that drives VI, A first manipulator 130 and a second manipulator 140 composed of a control mechanism that can be controlled, and
The first vacuum valve 111 and the second vacuum valve 121 are respectively installed at the ends of the movable parts to act when opening and closing the contacts inside the first and second vacuum valves 111 and 121, and to open contact The first and second vacuum valves 111 and 121 increase the contact force of the internal contact points with high pressure during closing to enable energization without temperature rise during energization, and the first manipulator 130 and The first contact spring 113 and the second contact spring 123 that receive the driving force of the second manipulator 140 and bind the main contacts inside the first vacuum valve 111 and the second vacuum valve 121, respectively. class,
a first main power input terminal 101 supplied to the first vacuum circuit breaker 110;
a second main power input terminal 103 supplied to the second vacuum circuit breaker 120;
an output terminal 102 to which the first main power source or the second main power source connected or blocked by the first vacuum valve 111 or the second vacuum valve 121 is output;
an insulating barrier 150 to which the first main power input terminal 101, the second main power input terminal 103, and the output terminal 102 are coupled;
and a control auxiliary device (117) capable of controlling the frame and cradle (160), the first manipulator (130), and the second manipulator (140), respectively.

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