Supporting structure of closing resistor unit for circuit breaker

Abstract

Disclosed is a supporting structure of a closing resistor unit for a circuit breaker which connects the closing resistor unit to the fixed portion through the first supporting plate and the second supporting plate to allow the closing resistor unit to move back and forth with respect to the fixed portion through the first supporting plate and to move up and down with respect to the fixed portion through the second supporting plate, whereby the closing resistor unit or its joints may be prevented from being damaged from impact.

Claims

1. A supporting structure including a closing resistor unit for a circuit breaker, the closing resistor unit being connected to a fixed portion of the circuit breaker provided in a gas insulation switchgear (GIS) to prevent a point of contact accident between a moving portion and the fixed portion, the supporting structure comprising: a first supporting plate connected at a front upper end of the closing resistor unit, having one end rotatably connected to an upper end of the fixed portion and another end rotatably connected to an upper end of the closing resistor unit; and a second supporting plate connected at a center of the closing resistor unit, having one end rotatably connected to a side of the fixed portion and another end connected to the closing resistor unit.

2. The supporting structure including the closing resistor for the circuit breaker of claim 1, wherein: the first supporting plate is provided with one or more first supporting plate fastening holes formed at both sides, one end of the first supporting plate is rotated while connected to the fixed portion as a fastening member is fastened to the fixed portion and the closing resistor unit by passing through the first supporting plate fastening holes, and another end of the first supporting plate is rotated while connected to the closing resistor unit.

3. The supporting structure including a closing resistor unit for a circuit breaker of claim 1, wherein: the second supporting plate is provided with a through hole formed at one end through which the closing resistor unit passes, one or more second supporting plate fastening holes formed at the other end of the second supporting plate, and the closing resistor unit is rotated by the second supporting plate as a fastening member is fastened to the fixed portion through the one or more second supporting plate fastening holes.

4. The supporting structure including the closing resistor for the circuit breaker of claim 3, wherein the fastening member is provided with a head formed at an upper portion, and the one or more second supporting plate fastening holes are further provided with a head seating portion on which the head is seated.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments and together with the description serve to explain the principles of the invention.

(2) In the drawings:

(3) FIG. 1 is a schematic view showing the state that a moving portion and a fixed portion are detached from each other in a conventional circuit breaker;

(4) FIG. 2 is a schematic view showing the state that a moving portion and a fixed portion are in contact with each other in a conventional circuit breaker;

(5) FIG. 3 is a perspective view showing the state that a closing resistor unit is installed in a fixed portion in accordance with the present invention;

(6) FIG. 4 is a plane view showing the state that a closing resistor unit is installed in a fixed portion in accordance with the present invention;

(7) FIG. 5 is a plane view showing the state that a closing resistor unit installed in the fixed portion is moved backwards due to external impact in accordance with the present invention;

(8) FIG. 6 is a cross-sectional view showing the state that a closing resistor unit is installed in a fixed portion in accordance with the present invention;

(9) FIG. 7 is a plane perspective view showing the state that a closing resistor unit is installed in a fixed portion in accordance with the present invention; and

(10) FIG. 8 is a perspective view showing a second supporting plate connected to a closing resistor unit of a circuit breaker according to the present invention.

DETAILED DESCRIPTION OF THE INVENTION

(11) Description will now be given in detail of the exemplary embodiments, with reference to the accompanying drawings. For the sake of brief description with reference to the drawings, the same or equivalent components will be provided with the same reference numbers, and description thereof will not be repeated. It is to be understood that the singular expression used in this specification includes the plural expression unless defined differently on the context.

(12) Hereinafter, a supporting structure of a closing resistor unit for a circuit breaker according to one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

(13) FIG. 3 is a perspective view showing the state that a closing resistor unit is installed in a fixed portion in accordance with the present invention.

(14) As shown in FIG. 3, the circuit breaker according to the present invention is provided with a moving portion (not shown) and a fixed portion 100 thereinside, and a closing resistor unit 200 is installed at the side of the fixed portion 100.

(15) The closing resistor unit 200 is installed at the side of the fixed portion 100 in order to avoid the point of contact accident which occurs when the moving portion and the fixed portion 100 make contact.

(16) The closing resistor unit 200 allows a closing resistor unit point of contact 210 provided in the closing resistor unit 200 to make contact with a closing resistor unit moving portion point of contact (not shown) before a main point of contact between the moving portion and the fixed portion 100 makes contact, whereby the moving portion and the fixed portion 100 makes contact in a state that overvoltage generated during the contact between the moving portion and the fixed portion 100 is suppressed at a predetermined level by the closing resistor unit 200.

(17) FIG. 4 is a plane view showing the state that the closing resistor unit is installed in the fixed portion in accordance with the present invention, FIG. 5 is a plane view showing the state that a closing resistor unit installed in the fixed portion is moved backwards due to external impact in accordance with the present invention, FIG. 6 is a cross-sectional view showing the state that a closing resistor unit is installed in a fixed portion in accordance with the present invention, FIG. 7 is a plane perspective view showing the state that a closing resistor unit is installed in a fixed portion in accordance with the present invention, and FIG. 8 is a perspective view showing a second supporting plate connected to a closing resistor unit of a circuit breaker according to the present invention.

(18) As shown in FIG. 4 to FIG. 8, a first supporting plate 220 is formed at a front upper end of the closing resistor unit 200, and a second supporting plate 230 is formed at the center of the closing resistor unit 200.

(19) The first supporting plate 220 is rotatably connected to the front upper end of the closing resistor unit 200, and has one rotatably connected to the upper end of the fixed portion 100 at a predetermined angle front to back with respect to the fixed portion 100 and the other end rotatably connected to the upper end of the closing resistor unit 200 at a predetermined angle front to back with respect to the fixed portion 100.

(20) At this time, one or more first supporting plate fastening holes 221 are formed at both sides of the first supporting plate 220, whereby a fastening member 223 such as a bolt is fastened onto the fixed portion 100 and the closing resistor unit 200 by passing through the first supporting plate fastening holes 221, allowing both ends of the first supporting plate 220 to rotate at a predetermined angle while connected to the fixed portion 100 and the closing resistor unit 200.

(21) Therefore, if an external impact is given to the closing resistor unit 200, the closing resistor unit 200 may absorb the external impact by moving back and forth with respect to the fixed portion 100 through the first supporting plate 220.

(22) Meanwhile, the second supporting plate 230 is provided at the center of the closing resistor unit 200 and allows the closing resistor unit 200 to move up and down with respect to the fixed portion 100.

(23) At this time, a through hole 231 is formed at one end of the second supporting plate 230, and one or more second supporting plate fastening holes 233 are formed at the other end of the second supporting plate 230.

(24) The closing resistor unit 200 is inserted into the through hole 231, and the fastening member 230 is fastened onto the fixed portion 100 by passing through the second supporting plate fastening hole 233.

(25) Therefore, as the closing resistor unit 200 is inserted into the through hole 231, one end of the second supporting plate 230 is connected to the closing resistor unit 200. And, the other end of the second supporting plate 230 is connected to the fixed portion 100 rotatably at a predetermined angle after the fastening member 240 passes through the second supporting plate fastening hole 233. Then, when there is an external impact on the closing resistor unit 200, the other end of the second supporting plate 230 may absorb the impact by moving up and down with respect to the fixed portion 100 via the second supporting plate 230.

(26) Moreover, the second supporting plate fastening hole 233 is further provided with a head seating portion 233a formed so that a head 241 of the fastening member 240 may be seated. When the fastening member 240 is fastened onto the fixed portion 100 by passing through the second supporting plate fastening hole 233, the head 241 is seated on the head seating portion 233a, making the head 241 not only unexposed to the outside but also connected to the fixed portion 100 through the second supporting plate fastening hole 233 more firmly.

(27) The present invention not only allows the closing resistor unit 200 to absorb the impact generated by the contact between the closing resistor unit point of contact 210 and the closing resistor unit moving portion point of contact by moving back and forth through the first supporting plate 220, but also allows the closing resistor unit 200 to absorb impact by moving up and down through the second supporting plate 230, whereby the closing resistor unit 200 or the joints between the closing resistor unit 200 and the fixed portion 100 may be prevented from being damaged even by the external impact, ultimately improving the structural stability of the closing resistor unit 200.

(28) Moreover, since the closing resistor unit 200 is firmly installed to the fixed portion 100, the circuit breaker may be used for a long period of time without worrying about detachment of the closing resistor unit 200 from the fixed portion 100, which extends the lifespan of the circuit breaker.

(29) Moreover, since the closing resistor unit 200 is installed on the fixed portion 100 using the first and second supporting plates 220 and 230, the closing resistor unit 200 may more easily be attached to or detached from the fixed portion 100.

(30) The foregoing embodiments and advantages are merely exemplary and are not to be considered as limiting the present disclosure. The present teachings can be readily applied to other types of apparatuses. This description is intended to be illustrative, and not to limit the scope of the claims. Many alternatives, modifications, and variations will be apparent to those skilled in the art. The features, structures, methods, and other characteristics of the exemplary embodiments described herein may be combined in various ways to obtain additional and/or alternative exemplary embodiments.

(31) As the present features may be embodied in several forms without departing from the characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, unless otherwise specified, but rather should be considered broadly within its scope as defined in the appended claims, and therefore all changes and modifications that fall within the metes and bounds of the claims, or equivalents of such metes and bounds are therefore intended to be embraced by the appended claims.