RU2573642C1 - Snap-action adjustment mechanism for circuit-breaker in moulded case - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: circuit-breaker includes a fixed contact, a movable contact, switching unit, actuating lever, disconnecting unit and arc-quenching unit. The circuit-breaker is coupled to the main circuit in order to ensure passage of current. The disconnecting unit comprises stationary magnet, armature and mechanism of snap-action. Stationary magnet is placed in the main circuit and intended to create magnet force when current deviating from the rate value if generated in the main circuit. Armature is designed so that it can rotate and contact the stationary magnet, at that one side of the armature is placed at fixed distance from the stationary magnet while the other side forms stepped slant surface at that. The mechanism of snap-action is designed to contact stepped slant surface of the armature and to perform linear motion to the left or to the right in order to adjust the distance between the stationary magnet and armature for the purpose of its turning, thus allowing adjustment not only between the stationary magnet and armature but also setup of current value deviating from the rate value and actuating the disconnector.

EFFECT: improved stability of actuation.

3 cl, 8 dwg

Description

Technical field

This application relates to an instantaneous adjusting device for a molded case circuit breaker, and more particularly, to an instantaneous actuation adjusting device for a circuit breaker in which the instantaneous mechanism of the trip unit can be used to precisely control the interval between the fixed magnet and the armature, which increases stability circuit breaker operation.

State of the art

In general, a circuit breaker is an electrical safety device that automatically locks the circuit to protect the circuit and the load when an abnormal current (for example, overload current, instantaneous current or short circuit current) flows between the power source and the load.

The trip unit for instantaneous current values that deviate from the norm detects a situation where a current with a constant multiplicity compared to the rated current is instantly supplied to the circuit breaker in order to trip the circuit breaker at the right time so as not to damage the circuit or load with the corresponding multiple current. This function can be attributed to the instantaneous release function.

Korean Patent Publication No. 10-2006-0101035 discloses an instantaneous release trip control device for a circuit breaker.

In FIG. 1 is a vertical sectional view showing a conventional instantaneous release trip control device for a circuit breaker.

According to FIG. 1, a conventional circuit breaker 100 with an instantaneous trip release control device includes a magnet 110 mounted in the main circuit to generate electromagnetic force when an abnormal current is created, an armature 120 that rotates under the influence of the electromagnetic force of the magnet 110, a transverse rail 130 included in the connection in the process of working with the armature 120 to rotate it, the bolt 140, connected to the transverse bar 130 to trigger the mechanism and lock the chain, spring 150 instant action, added the load in the direction opposite to the rotation of the armature 130, to limit the working range of the current, the mechanism 160 instant action, controlling the load of the spring 150 instant action to adjust the operating value of the current, as well as the disk controller 170 instant action, indicating the position of the mechanism 160 instant action, user-defined .

Using these components, the electromagnetic force created between the magnet 110 and the armature 120 when the current deviates from the norm is inversely proportional to the load added by the armature spring 150. Therefore, in order for the trip to be created at high current, the user rotates the instantaneous action dial 170 to tilt the rear side by an angle of inclination, while the instantaneous action dial 170 contacts the instantaneous action mechanism 160 to control the increase in the initial spring load 150 instant action.

According to the above procedure, when the abnormal current that triggers the trip is set and the abnormal current is created on the line, the electromagnetic force is created by the magnet 110, the armature 120 is moved by the gravitational force created by the electromagnetic force of the magnet 110 and rotates in a counterclockwise direction, resulting in the armature 120 comes into contact with the magnet 110. At the same time, since the armature 120 is supported by the instantaneous spring 150, the magnetic force may be greater than the spring force of the spring 150 instantaneously actual action.

Since the spring spring 150 of the instantaneous action 150 is used in a conventional instantaneous trip device of the circuit breaker 100, it is difficult to maintain a load density index due to a deviation (+ 10%) that cannot be fixed in the instant springs without constantly adjusting the interval between the magnet and the armature.

SUMMARY OF THE INVENTION

To solve the problem described above, in this application it is proposed to provide an instantaneous circuit breaker release device with an instantaneous action mechanism that can be used to continuously adjust the interval between the magnet and the armature.

In some embodiments, the circuit breaker includes a fixed contact, a movable contact, a switching unit, a control lever, a trip unit and an arc chamber unit, wherein the circuit breaker is connected to the main circuit to provide current flow, and the trip unit includes a fixed mounted a magnet that is installed in the main circuit, creating electromagnetic force, when an abnormal current is created in the main circuit, an armature that comes into contact with a fixed magnet, when turn, where one side is spaced from the fixed magnet by a fixed interval, and the other side forms a stepped inclined surface, and the instantaneous mechanism comes into contact with the stepped inclined surface of the armature and performs left and right rectilinear movement to adjust the interval between the fixed magnet and an anchor for turning it.

In one embodiment, the circuit breaker may further include an armature support unit supporting one side of the armature, and an armature spring connecting the armature and the armature support unit to provide elasticity when the armature is rotated, according to the movement of the instantaneous mechanism.

In one embodiment, the instantaneous action mechanism may further include an instantaneous action disk regulator with a groove formed thereon to define an instantaneous current value.

According to an embodiment of the invention, this embodiment provides the effect that the anchor has a stepped inclined surface with an angle of inclination and an instantaneous mechanism that performs left and right rectilinear movements to rotate the armature, the interval between the fixed magnet and the armature is adjustable, and the value deviates from the norm the current driving the release is installed.

The effect of this embodiment also lies in the fact that the instantaneous disk controller can be made with a groove for setting the instantaneous current value and for fine-tuning the amount of current deviating from the norm that drives the release.

Brief Description of the Drawings

FIG. 1 is a vertical sectional view of a conventional instantaneous release trip control device for a circuit breaker.

FIG. 2 is a sectional view of a conventional circuit breaker.

FIG. 3 depicts a general view of the structure of a trip unit of a circuit breaker according to an example of an embodiment of the described technical solution.

FIG. 4 is a side view showing the operation of the trip unit of the circuit breaker of FIG. 3.

FIG. 5 is a perspective view showing the operation of the trip unit of the circuit breaker of FIG. 3.

FIG. 6 is a diagram showing a combined position of a plurality of trip units of FIG. 3.

Description of preferred embodiments of the invention

The embodiments and configurations shown in the drawings are for illustrative purposes only and do not represent all of the technical scope of the invention, so it should be understood that various equivalents and modifications may exist at the time of filing this application. Although a preferred embodiment of the disclosure has been described for illustrative purposes, those skilled in the art should understand that various modifications, additions, and replacements are possible without departing from the scope and meaning of the invention, as shown in the attached claims.

The terms and words used in the description and claims should be construed as relevant to the technical field of the invention on the basis of the fact that the inventor can properly define the concept of terms to better explain the invention.

The terms "first" and "second" can be used to refer to various components, while the components cannot be limited by the above terms. The terms should be used to distinguish one component from another component. For example, the first component may refer to the second component and vice versa without deviating from the essence of the disclosure.

The term "and / or" should be understood as including all combinations that can be made of one or more relevant elements. For example, the term “first element, second element and / or third element” means not only the first, second or third element, but also a combination of all elements that can be made of two or more of the first, second or third elements.

When a component is referred to as “connected to” or connected to another component, the component can be connected directly or connected to another component, or an intermediate component can be in between. In contrast, if a component is referred to as “directly connected to” or “directly connected” to another component, the intermediate component is not present between them.

The terms used in the description serve to explain specific embodiments and are not intended to limit the disclosure. Unless otherwise indicated in the text, singular expressions may refer to plural expressions. In the following description, the term “include” or “have” will be used to refer to a feature, quantity, step, action, component, part, or combination thereof without excluding the presence or addition of one or more features, quantities, steps, actions, components, parts, or their combinations.

Identification letters (for example, a, b, c, etc.) in the corresponding steps are used for the sake of explanation and do not describe the order of the corresponding steps. The corresponding steps may be changed from the mentioned order, unless otherwise indicated in the text. That is, the corresponding steps can be performed in the same order as described, can essentially be performed simultaneously, or can be performed in the reverse order.

Unless otherwise specified, terms that include technical and scientific terms used in this description can have a meaning that can usually be understood by specialists in this field of technology. Terms such as those defined in a regular vocabulary should be interpreted based on the context related to the technical solution and should not be interpreted as idealistic or excessive.

In FIG. 2 is a sectional drawing showing a conventional circuit breaker.

With reference to FIG. 2, the circuit breaker includes a fixed contact 210 connected to a power source and a load, a moving contact 220 connected or disconnected from the fixed contact 210, by rotation, a switching unit 230 that controls the movement of the movable contact 220 for switching the circuit, a tripping unit 240, detecting abnormal current (i.e., overload current, instantaneous current and short circuit current), if you have to turn on the switching unit 230 and block the circuit and block 250 of the arc chamber, removing given by the arc when the circuit is blocked.

In FIG. 3 is a perspective view showing the structure of a trip unit of a circuit breaker according to an example of an embodiment of the described technical solution.

As shown in FIG. 3, the circuit breaker tripping unit 240 includes a fixed magnet 310, which generates electromagnetic force when abnormal current is generated in the main circuit, an armature 320 with a stepped inclined surface 321 formed thereon, and coming into contact with a fixed magnet 310 when turning and the instantaneous mechanism 330, turning the anchor.

In one embodiment, the circuit breaker uncoupling unit 240 may further include an armature support unit 340 and an armature spring 350 connecting the armature 320 and the armature support unit 340 to provide elasticity when the armature 320 rotates. In one embodiment, the instantaneous mechanism 330 may further include a disk regulator 360 of instantaneous action with a groove formed on it, made to set the instantaneous current value.

The fixed magnet 310 is mounted in the main circuit. A still-mounted magnet 310 creates electromagnetic force when abnormal currents are created in the main circuit.

One side of the armature 320 is spaced apart from the fixed magnet by a fixed interval, and the armature 320 is rotatably mounted. Anchor 320 comes into contact with a fixed magnet when the armature 320 rotates. The other side of the armature 320 forms a stepped inclined surface 321. In one embodiment, the armature 320 may further include a connecting protruding portion 322 capable of securing the instantaneous spring 350.

When the instant action mechanism 330 performs left and right rectilinear movements, one side thereof is in contact with the stepwise inclined surface 321 of the armature 320, thereby the instant action mechanism 330 rotates the armature 320, according to the height difference, on the stepwise inclined surface 321 to adjust the interval between fixedly mounted by magnet 310 and an anchor 320. In one embodiment, the instantaneous mechanism 330 is in contact with a stepped inclined surface 321 of a plurality of anchors 320 d To adjust the interval between each of the plurality of anchors 320 and each of the plurality of fixedly mounted magnets 310.

Anchor support unit 340 supports one side of the anchor and fixes one side of the anchor spring 350.

An armature spring 350 connects the armature 320 and the armature support unit 340 to provide elasticity of rotation of the armature 320 according to the movement of the instantaneous mechanism 330.

The instantaneous disk controller 360 is connected to the instantaneous mechanism 330 and causes the instantaneous mechanism 330 to perform left and right rectilinear movement when the instantaneous disk controller 360 is rotated. In one embodiment, a groove 361 may be formed on the instantaneous disk controller, which is implemented to set the instantaneous current values. Therefore, the instantaneous disk controller 360 is connected to the actuation unit, providing free rotation.

In FIG. 4 is a side view showing the operation of the trip unit of the circuit breaker of FIG. 3, and in FIG. 5 is a perspective view showing the operation of the trip unit for the circuit breaker of FIG. 3.

As shown in FIG. 4 and 5, when the instantaneous rotary dial 360 rotates, the instantaneous action mechanism 330 performs left and right rectilinear movement, with one side of the instantaneous action mechanism 330 coming into contact with the stepped inclined surface 321 of the armature 320, whereby the instantaneous action mechanism 330 rotates the armature 320 according to the height difference on the stepped inclined surface 321 for adjusting the interval between the stationary magnet 310 and the armature 320. Thus, the deflection value is set schegosya by current standards, resulting in the release operation.

When an abnormal current is created, the electromagnetic force generated from the fixed magnet 310 is inversely proportional to the interval between the fixed magnet 310 and the armature 320. Therefore, in order for the release to be activated at a higher current than the set current, the instantaneous disk 360 can rotate until connected to the upper side 321b of the stepped inclined surface 321 of the armature 320 and one side of the instantaneous mechanism 330.

When the upper side 321b of the stepped inclined surface 321 of the armature 320 is in contact with one side of the instantaneous mechanism 330, the armature 320 rotates toward the fixed magnet 310 and the interval between the fixed magnet 310 and the armature 320 becomes smaller. Therefore, the anchor spring 350 is more taut and the elastic force is greater.

On the other hand, in order for the release to operate at a lower current value than the set current, the instantaneous disk controller 360 rotates to connect to the lower side 321a of the stepped inclined surface 321 of the armature 320 and one side of the instantaneous mechanism 330.

When the lower side 321a of the stepped inclined surface 321 of the armature 320 is in contact with one side of the instantaneous mechanism 330, the armature 320 rotates in the opposite direction to the fixed magnet 310, and the interval between the fixed magnet and the armature 320 becomes larger. Therefore, the anchor spring 350 is more compressed, and the elastic force is less.

When the amount of abnormal current includes a trip, which is configured in accordance with the procedure described above, and a deviating current is generated in the main circuit, the electromagnetic force is generated in the fixed magnet 310 and the gravitational force is applied to the armature 320 by the electromagnetic force of the fixed magnet 310.

Anchor 320 is supported by an anchor spring 350, while a gravitational force is applied to the anchor 320 by the electromagnetic force of the fixed magnet 310 greater than the elastic force of the anchor spring 350, and the anchor 320 is rotated to come into contact with the fixed magnet 310.

In FIG. 6 is a diagram showing a plurality of trip units connected to the cross bar and the shutter of FIG. 3.

As shown in FIG. 6, one side of the armature 320 is connected to the transverse bar 610, while the other side of the transverse bar 610 is connected to the shutter 620.

In one embodiment, when the armature 320 of the trip unit 240 is rotated to come into contact with the fixed magnet 310, the armature 320 may exert pressure on the underside of the cross bar 610. In one embodiment, the cross bar 610 delimits a gate 620 connected to the switch unit , and when the transverse bar 610 rotates, the shutter 620 bounded by the transverse bar 610 is taken out of rotation by the transverse bar 610, while the switching unit 240 is disengaged.

Therefore, when the armature rotates to come into contact with the magnet 310 fixedly mounted, the armature 320 applies pressure to the underside of the cross bar 610 by rotating the cross bar 610 clockwise, while when the cross bar 610 rotates clockwise, the shutter limited state 620, locked by the transverse bar 610, is removed, which leads to the disengagement of the switching unit.

According to the described technical solution, the present application has an effect according to which an anchor having a stepped inclined surface with an angle of inclination, and an instant action mechanism that performs left and right rectilinear movements to rotate the anchor, allow you to adjust the interval between the fixed magnet and the anchor and the magnitude of the deviating from the norm of the current, the actuating release can be installed.

Also, this application has the effect, according to which the instantaneous disk regulator with a groove formed on it, by setting the instantaneous current value, allows you to accurately set the amount of current that deviates from the norm that drives the release.

Although embodiments have been described with reference to a number of illustrated embodiments, it should be understood that numerous other modifications and embodiments may be proposed by those skilled in the art, which should not be within the spirit and scope of the present invention.

Claims (3)

1. The circuit breaker, which includes a fixed contact, a movable contact, a switching unit, a trip unit and an arc chamber unit, wherein the circuit breaker is connected to the main circuit to provide current flow, while the trip unit contains:
a fixed magnet installed, which is installed in the main circuit, while the fixed magnet is configured to create magnetic force when the main circuit generates a current that deviates from the norm;
an anchor made to come into contact with a fixed magnet during rotation, while one side is spaced from the fixed magnet by a fixed interval, while its other side forms a stepped inclined surface; as well as
instantaneous mechanism that comes into contact with a stepped inclined surface of the armature with the ability to perform left and right rectilinear movement to adjust the interval between the fixed magnet and the armature for its rotation. 2. The circuit breaker according to claim 1, further comprising:
an anchor support unit configured to support one side of the anchor; and
an anchor spring connecting the anchor and the armature support unit to provide elasticity of rotation of the armature according to the movement of the instantaneous mechanism. 3. The circuit breaker according to claim 1, wherein the instantaneous mechanism is equipped with a disk regulator of instantaneous action with a groove for setting the instantaneous value of the current value.

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