Apparatus for auxiliary contact of circuit breaker
09761400 ยท 2017-09-12
Assignee
Inventors
Cpc classification
H01H13/52
ELECTRICITY
International classification
Abstract
An apparatus for auxiliary contact of a circuit breaker includes a frame, a fixed contactor fixed to the frame inside the frame, a movable contactor installed inside the frame to be contacted with or separated from the fixed contactor, and a contact control member installed inside the frame, the contact control member being formed in a straight line shape, the contact control member being pressurized upward as an overcurrent is applied to the circuit breaker to allow the movable contactor to be contacted with or separated from the fixed contactor.
Claims
1. An apparatus for auxiliary contact of a circuit breaker, the apparatus comprising: a frame; a fixed contactor installed inside the frame; a movable contactor that is installed inside the frame and configured to contact or separate from the fixed contactor; and a contact control member installed inside the frame and formed in a straight line shape such that the contact control member is pressurized upward as an overcurrent is applied to the circuit breaker in order to cause the movable contactor to contact the fixed contactor, wherein the contact control member includes a body portion that is located inside the circuit breaker and configured to move up and down, and a movable plate provided at both sides of the body portion to cause the movable contactor to contact or separate from the fixed contactor by moving the movable contactor as the body portion moves, and wherein a length of one side of the movable plate in a direction perpendicular to a moving direction of the body portion is shorter than a length between an outer side surface of the body portion and the fixed contactor.
2. The apparatus of claim 1, wherein the movable contactor is inclined inside the frame.
3. The apparatus of claim 1, wherein: the fixed contactor includes a first fixed contactor and a second fixed contactor; the movable contactor includes a first movable contactor located over the first fixed contactor and a second movable contactor located under the second fixed contactor; the first movable contactor contacts the first fixed contactor and the second movable contactor separates from the second fixed contactor when the circuit breaker is in a normal state; and the first movable contactor separates from the first fixed contactor and the second movable contactor contacts the second fixed contactor when an overcurrent is applied to the circuit breaker.
4. The apparatus of claim 1, wherein the moving plate is adhered closely to an inner surface of the frame before the body portion is pressurized upward.
Description
BRIEF DESCRIPTION OF THE DRAWING
(1) The accompanying drawings, which are included to provide a further understanding of the disclosure 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 disclosure.
(2) In the drawings:
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DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS
(8) 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.
(9)
(10) As shown in
(11) In this case, a fixed contactor 120, a movable contactor 130, a screw portion 110, a contact control member 140, and the like are provided inside the frame 100.
(12) The fixed contactor 120 is integrally formed with a fixing plate 150 inside the frame 100 to be fixed to the fixing plate 150 through the screw portion 110 passing through the fixing plate 150. Thus, the fixed contactor 120 is contacted with or separated from the movable contactor 130, thereby displaying a state of the circuit breaker to the outside.
(13) In this case, the fixed contactor 120 includes a first fixed contactor 120a and a second fixed contactor 120b. The first fixed contactor 120a and the second fixed contactor 120b are located both sides of the contact control member 140.
(14) The movable contactor 130 is formed in a straight line shape, and located to be inclined in a state in which one side of the movable contactor 130 is fixed to an inner surface of the frame 100. Thus, the movable contactor 130 is contacted with or separated from the fixed contactor 120 as the contact control member 140 moves up/down, thereby displaying a state of the circuit breaker to the outside.
(15) In this case, the movable contactor 130 includes a first movable contactor 130a and a second movable contactor 130b. The first movable contactor 130a is located over the first fixed contactor 120a, and the second movable contactor 130b is located under the second fixed contactor 120b. Thus, the first movable contactor 130a is contacted with or separated from the first fixed contactor 120a through the contact control member 140, and the second movable contactor 130b is contacted with or separated from the second fixed contactor 120 through the contact control member 140.
(16) In the conventional art, the movable contactor 130 is contacted with or separated from the fixed contactor 120 as the contact control member 140 moves up/down in a state in which the movable stator 130 is provided in the apparatus to be bent to a predetermined angle. Hence, it is difficult to manufacture the apparatus by adjusting the bending of the movable contactor 130 without any error such that the operation of the auxiliary contact is smoothly performed. Also, the movable contactor 130 is contacted with or separated from the fixed contactor 120 as the contact control member moves in a state in which the movable contactor 130 is bent to an extent. Hence, if the apparatus is used for a long time, the movable contactor 130 is easily deformed, and therefore, operational characteristics of the movable contactor 130 and the fixed contactor 120 are easily changed. However, in the present disclosure, the movable contactor 130 is formed in a straight line shape so as not to be bent, so that it is possible to prevent an error from occurring in manufacturing of the apparatus.
(17) Also, the movable contactor 130 is not only formed to have the straight line shape but also located to be inclined. Thus, when the movable contactor 130 returns to the original position in a state in which the movable contactor 130 is bent upward by being pressurized through the contact control member 140, the movable contactor 130 is influenced by only self-bending thereof, so that it is possible to prevent operational characteristics of the apparatus from being easily changed when the movable contactor 130 and the fixed contactor 120 are contacted with or separated from each other.
(18) Meanwhile, the contact control member 140 is provided inside the frame 100. Thus, if an overcurrent is applied to the circuit breaker, the contact control member 140 is pressurized to push the movable contactor 130 while moving upward, so that the movable contactor 130 is contacted with or separated from the fixed contactor 120.
(19) In this case, the contact control member 140 includes a body portion 141 and a moving plate 143. The body portion 141 is provided inside the frame 100 to move up/down inside the frame 100, and the moving plate 143 is integrally formed with the body portion 141 at both sides of the body portion 141, to allow the movable contactor 130 to be contacted with or separated from the fixed contactor 120 while moving up/down as the body portion 141 moves.
(20) More specifically, before an overcurrent is applied to the circuit breaker, a front lower surface of the second movable contactor 130b is contacted with one upper end of the moving plate 143, and a front end of the first movable contactor 130a is located at the other side of the moving plate 143 to be upwardly spaced apart from the moving plate 143.
(21) In this state, the first movable contactor 130a is contacted with the first fixed contactor 120a, and the second movable contactor 130b is separated from the second fixed contactor 120b.
(22) After that, if the contact control member 140 is pressurized to move upward as an overcurrent is applied to the circuit breaker, the first movable contactor 130a and the second movable contactor 130b are moved upward by the moving plate 143. Thus, the first movable contactor 130a is separated from the first fixed contactor 120a, and the second movable contactor 130b is contacted with the second fixed contactor 120b, thereby displaying, to the outside, whether the overcurrent has been applied to the circuit breaker.
(23) Meanwhile, the moving plate 143 is located to be adhered closely to a bottom surface of the frame 100 before the contact control member 140 is pressurized upward. The length L2 of one side of the moving plate 143 in a direction perpendicular to the moving direction of the body portion 141 is formed shorter than the length L1 between the outer side surface of the body portion 141 and the fixed contactor 120.
(24) In the conventional art, the apparatus is configured such that the movable contactor is moved in the state in which the lever is inserted into the crossbar at a lower portion of the crossbar, and therefore, a plurality of components are used to move the movable contactor. However, in the present disclosure, the contact control member is not formed with a plurality of components but integrally formed as one component. Thus, it is possible to decrease the number of components used in the apparatus and simplify the structure of the apparatus.
(25) The moving plate 143 is located to be adhered closely to the bottom surface of the frame 100 before the moving plate 143 is pressurized, and the length L2 of one side of the moving plate 143 in a direction perpendicular to the moving direction of the body portion 141 is formed shorter than the length L1 between the outer side surface of the body portion 141 and the fixed contactor 120. Thus, the one contact control member 140 can be used in various structures without using contact control members separately formed according to structures of the movable contactor 130 and the fixed contactor 120, thereby reducing the manufacturing cost of the apparatus.
(26) In the present disclosure configured as described above, when the circuit breaker is in a normal state, the moving plate 143 is adhered closely to the bottom surface of the frame 100 in the state in which the contact control member 140 is not pressurized. If an overcurrent is applied to the circuit breaker, the contact control member 140 is pressurized upward, so that the movable contactors 130a and 130b located at both the sides of contact control member 140 are moved through the moving plate 143 to be contacted with or separated from the fixed contactors 120a and 120b.
(27) The foregoing embodiments and advantages are merely exemplary and are not to be construed 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.
(28) 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 construed 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.