KR101829317B1 - Trip apparatus of mold case circuit breaker - Google Patents

Trip apparatus of mold case circuit breaker Download PDF

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Publication number
KR101829317B1
KR101829317B1 KR1020150151593A KR20150151593A KR101829317B1 KR 101829317 B1 KR101829317 B1 KR 101829317B1 KR 1020150151593 A KR1020150151593 A KR 1020150151593A KR 20150151593 A KR20150151593 A KR 20150151593A KR 101829317 B1 KR101829317 B1 KR 101829317B1
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KR
South Korea
Prior art keywords
instantaneous
rotation moment
spring
control lever
armature
Prior art date
Application number
KR1020150151593A
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Korean (ko)
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KR20170051657A (en
Inventor
조동진
안병수
백기호
Original Assignee
현대일렉트릭앤에너지시스템(주)
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Priority to KR1020150151593A priority Critical patent/KR101829317B1/en
Publication of KR20170051657A publication Critical patent/KR20170051657A/en
Application granted granted Critical
Publication of KR101829317B1 publication Critical patent/KR101829317B1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2463—Electromagnetic mechanisms with plunger type armatures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/32—Electromagnetic mechanisms having permanently magnetised part
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/528—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a toggle or collapsible link between handle and contact arm, e.g. sear pin mechanism
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/36—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electromagnetic release and no other automatic release
    • H01H73/38—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electromagnetic release and no other automatic release reset by lever

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)

Abstract

The present invention relates to an armature for rotating an armature, a rotation moment control lever provided to be rotatable in opposition to the armature for adjusting a rotation moment of the armature, The instantaneous spring is supported on the rotation moment adjusting lever. The instantaneous spring is moved in a direction in which the instantaneous spring is tensioned and compressed. A trip device for a wiring breaker including a movable support portion as far as possible is provided.

Description

[0001] TRIP APPARATUS OF MOLD CASE CIRCUIT BREAKER [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trip device for a circuit breaker, and more particularly, to a trip device for a circuit breaker capable of adjusting the tension of an instantaneous spring.

Generally, a circuit breaker is an electric device that automatically protects a circuit by shutting off the circuit when an abnormal current (for example, an overcurrent or a short circuit) occurs in the converter. The circuit breaker for wiring is composed of a terminal part connecting the power source side and the load side, a main circuit composed of a fixed contact part and a movable contact part in the circuit breaker for wiring, an opening and closing device part for connecting and shorting the main circuit, Trip device.

Here, the trip device recognizes an abnormal current in the circuit breaker and automatically short-circuits the circuit, irrespective of artificial opening and closing when an abnormal current is generated. The trip is a function that detects the amount of current when the instantaneous current flows, that is, when the current is applied at a certain magnification of the rated current of the circuit breaker, and blocks the main circuit at a certain magnification and for a suitable time.

On the other hand, FIG. 1 shows a trip device of a conventional circuit breaker.

1, a trip portion of a conventional circuit breaker includes a main circuit contact 10, a fixed magnet 20, an armature 30, a trip shaft 40, a rotation moment control lever 50, 60 and an instant bar 70.

Here, the fixed magnet 20 generates an electromagnetic force when an abnormal current is generated in the main circuit contact 10, and the armature 30 is rotated counterclockwise by the electromagnetic force of the fixed magnet 20 to be fixed And may be mechanically connected to the magnet 20.

At this time, the armature 30 rotates and rotates the trip shaft 40 to operate the cutoff mechanism (not shown) to disconnect the contacts of the breaker.

The rotation moment control lever 50 is configured to be rotatable with respect to the lever rotation axis 55 so as to oppose the armature 30 and to control the rotation moment of the armature 30. [

For this, an instantaneous spring 60 is connected to the upper end of the armature 30 and the lower end of the rotation moment control lever 50.

The rotation moment control lever 50 can adjust the rotation moment of the armature 30 by adjusting the tension of the instantaneous spring 60 by adjusting the rotation angle.

The instant bar 70 connected to the upper end of the rotation moment control lever 50 is provided to adjust the rotation angle of the rotation moment control lever 50. The momentary bar 70 can be adjusted in its angle of rotation via the instantaneous adjustment knob 75.

A trip portion of a conventional circuit breaker having such a structure is disclosed in Japanese Patent Application No. 10-1276370.

On the other hand, there are various rated currents for each size of the circuit breaker. Therefore, the range of the tensile force of the instantaneous spring 60 required for each rated current differs.

However, in the trip device of the conventional circuit breaker, the adjustment range of the instantaneous spring 60 tension is limited only by the design change of the instantaneous spring 60 for each rated current, Could not be satisfied.

Therefore, the conventional circuit breaker for a wiring breaker has to individually design parts for instantaneous trip according to each rated current even within the same size. Therefore, as the design of the trip device for each rated current varies, the number of parts increases, There is a problem of rising.

SUMMARY OF THE INVENTION It is an object of the present invention to at least partially solve the problems of the prior art as described above, and to provide a trip device for a wiring breaker in which the tension range of the instantaneous spring is increased.

According to one aspect of the present invention, there is provided a magnetic bearing device comprising a fixed magnet, an armature pivoted by an electromagnetic force of the fixed magnet, and an armature rotatably opposed to the armature to adjust a rotation moment of the armature And an instantaneous spring connected between the armature and the rotation moment adjusting lever, wherein the instantaneous spring is provided to the rotation moment control lever And a movable support portion that supports the instantaneous spring and is movable in a direction in which the instantaneous spring is tensioned and compressed.

In one embodiment, the movable support can maintain the moved position against the resilient restoring force of the instantaneous spring.

Further, in one embodiment, the instantaneous spring may be composed of a tension coil spring having one end coupled to the armature and the other end coupled to the movable support.

Further, in one embodiment, the movable support portion includes an adjusting screw provided on the rotation moment adjusting lever; And a movable holder coupled to the instantaneous spring and screwed to the adjustment screw and reciprocally movable according to rotation of the adjustment screw.

Also, in one embodiment, a tool engagement groove may be formed at one end of the adjustment screw so that a tool for rotating the adjustment screw can be fastened.

According to an embodiment of the present invention having such a configuration, the adjustment range of the instantaneous spring is expanded, thereby increasing the adjustment range of the instantaneous trip and increasing the design range of the instantaneous spring in the same structure.

Further, according to the embodiment of the present invention, since the parts having the same specifications can be commonly used for the circuit breaker of various sizes, the manufacturing cost of the device can be reduced.

1 is a side view of a trip device of a conventional circuit breaker.
2 is a side view showing a state in which the movable support portion of the trip device of the circuit breaker according to the embodiment of the present invention is elevated.
3 is a side view showing a state in which the movable support portion of the trip device of the wiring breaker shown in Fig. 2 is lowered.
Fig. 4 is a view of the trip device of the circuit breaker shown in Fig. 2 as viewed from the side of the rotation moment adjusting lever.
5 is a perspective view of the circuit breaker shown in Fig.
6 is a top view of the circuit breaker shown in Fig.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Furthermore, the singular forms "a", "an," and "the" include plural referents unless the context clearly dictates otherwise.

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

Referring to Figs. 2 to 6, a trip device 100 of a circuit breaker according to an embodiment of the present invention will be described.

2 to 6, a trip device 100 of a circuit breaker according to an embodiment of the present invention includes a main circuit contact 110, a fixed magnet 120, an armature 130, a trip shaft 140 The instantaneous bar 160, the instantaneous adjustment knob 170, the instantaneous spring 180, and the movable support 190. The rotation moment control lever 150,

The main circuit contact point 110 is a conductor constituting a path through which a main current flows in the circuit breaker.

The fixed magnet 120 is disposed close to the main circuit contact 110 and generates an electromagnetic force when an abnormal current is generated in the main circuit contact 110.

The armature 130 is opposed to the stationary magnet 120 and is movably provided so that the armature 130 can be operated by the electromagnetic force generated by the stationary magnet 120 to rotate the trip shaft 140.

The armature 130 may be rotated in a direction approaching the fixed magnet 120 and in a direction moving away from the fixed magnet 120 through the rotating shaft 132 provided at the lower end. The armature 130 rotates while rotating the trip shaft 140 to operate the cutoff mechanism (not shown).

The trip shaft 140 is rotated to operate a cutoff mechanism (not shown) of the circuit breaker. 2 and 3, when the armature 130 is rotated counterclockwise by the electromagnetic force of the fixed magnet 120, the trip shaft 140 receives the rotational force from the upper end of the armature 130 and rotates clockwise However, the operating structure of the trip shaft 140 is not limited thereto.

The rotation moment control lever 150 is disposed to face the armature 130 and can rotate about the rotation axis 152. [

In one embodiment, the rotation moment control lever 150 is configured to extend at the upper and lower ends with respect to the rotary shaft 152. The upper end of the rotation moment control lever 150 is configured to be caught by the instant bar 160. The lower end of the rotation moment control lever 150, To the instantaneous spring (180).

The rotation moment control lever 150 can adjust the rotation moment of the armature 130 by adjusting the tension length of the instantaneous spring 180 through the rotation angle adjustment. That is, the adjustment range of the tensile force of the instantaneous spring 180 can be set to the rotation angle range of the rotation moment control lever 150.

The instant bar 160 may adjust the rotation angle of the rotation moment rotation moment control lever 150. In one embodiment, the instant bar 160 may engage the top of the rotational moment to constrain the clockwise rotation of the rotational moment control lever 150. The instant bar 160 may be rotated clockwise or counterclockwise to adjust the rotation angle of the rotation moment control lever 150.

The instantaneous adjustment knob 170 is adjustable from the outside of the circuit breaker to adjust the rotation angle of the instantaneous bar 160.

The instantaneous spring 180 may be connected between the armature 130 and the rotation moment control lever 150 to provide an elastic restoring force to the armature 130 in the direction of the rotation moment control lever 150.

To this end, in one embodiment, the instantaneous spring 180 may be constituted by a tension coil spring having one end coupled to the upper end of the armature 130 and the other end coupled to the movable support 190, which will be described later.

Although not shown, a plurality of instantaneous springs 180 may be connected between the armature 130 and the rotation moment control lever 150.

This instantaneous spring 180 may cause the armature 130 to be spaced apart from the stationary magnet 120 when the armature 130 is not affected by the electromagnetic force of the stationary magnet 120.

Since the instantaneous spring 180 increases the resilient restoring force applied to the armature 130 as the tension spring of the instantaneous spring 180 becomes longer, the electromagnetic force of the fixed magnet 120, which can move the armature 130, Can be increased in proportion to the tensile length of the wire 180.

The movable support portion 190 is provided on the rotation moment control lever 150 so that the instantaneous spring 180 can be supported by the rotation moment control lever 150 and the instantaneous spring 180 is moved in the direction in which the instantaneous spring 180 is tensioned and compressed It can be possible.

This movable support portion 190 is lifted and lowered as shown in FIGS. 2 and 3, and the adjustment range of the tensile force of the instantaneous spring 180 can be extended by adjusting the tension length of the instantaneous spring 180.

In one embodiment, the movable support 190 can maintain its moved position against the resilient restoring force of the tensioned instantaneous spring 180. That is, the movable support portion 190 may have a position fixing force capable of resisting the elastic restoring force of the instantaneous spring 180 so that the position of the movable spring 190 is not changed by the elastic restoring force of the instantaneous spring 180.

For this purpose, the movable support portion 190 may include a multi-stage hook structure that is fixed to the rotation moment control lever 150 according to its position, a piston structure capable of resisting the elastic restoring force of the instantaneous spring 180 through hydraulic pressure or air pressure, A lever structure in which an angle can be fixed, and the like. However, it is preferable that the instantaneous spring 180 is formed of a screw coupling structure so as to finely adjust a tension length of the instantaneous spring 180.

Thus, in one embodiment, the movable support 190 may comprise an adjustment screw 192 and a movable holder 194.

The adjusting screw 192 may be rotatably mounted on the rotation moment adjusting lever 150 such that the screw is extended from the lower end of the rotation moment adjusting lever 150 toward the upper end as shown in FIGS. Lt; / RTI >

In one embodiment, a tool engagement groove 193 can be formed at the upper end of the adjustment screw 192, in which a tool for rotating the adjustment screw 192 can be fastened. The user can rotate the adjusting screw 192 using a tool corresponding to the tool engaging groove 193 such as a flat screwdriver or a cross screwdriver.

For example, the adjustment screw 192 may be configured such that the tool engagement groove 193 is disposed upward as shown in FIG. 6, so that the user can adjust the trip of the trip circuit breaker according to the embodiment of the present invention With the apparatus 100 installed in the breaker, the adjusting screw 192 can be rotated using a tool.

The movable holder 194 may be coupled to the lower end of the instantaneous spring 180 and may be screwed to the adjustment screw 192 so that the movable holder 194 can be moved up and down according to the rotation of the adjustment screw 192.

The trip device 100 of the circuit breaker according to the embodiment of the present invention as described above is configured such that the adjustment range of the tension spring of the instantaneous spring 180 is adjusted through the rotation angle adjustment of the rotation moment control lever 150 And can be extended and finely adjusted by adjusting the position of the movable support portion 190 in a secondary direction.

In the trip device 100 of the circuit breaker according to the present invention, the range of adjustment of the tensile force of the instantaneous spring 180 is extended, resulting in an increase in the adjustment range of the instantaneous trip, It is possible to design a circuit breaker capable of performing the same operation using the same parts.

In addition, since the adjustment range of the tension spring of the instantaneous spring 180 is extended in the trip device 100 of the circuit breaker according to the embodiment of the present invention, components of the same specification can be commonly used for the circuit breaker of various sizes, The manufacturing cost of the device is reduced.

While the present invention has been particularly shown and described with reference to particular embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention as defined by the following claims I would like to make it clear.

100: Trip device of wiring breaker
110: Main circuit contact point
120: Fixed magnet
130: Amateur
140: Trip shaft
150: Rotation moment control lever
160: Instant Bar
170: instantaneous adjustment knob
180: instantaneous spring
190:
192: Adjusting screw
193: Tool fastening groove
194: Operation holder

Claims (5)

A rotation moment control lever provided to be rotatable in opposition to the armature to adjust a rotation moment of the armature; and a rotation moment control lever provided between the armature and the rotation moment control lever 1. A trip device for a wiring breaker including an instantaneous spring connected thereto,
An instantaneous bar hooked on an upper end of the rotation moment control lever to limit a rotation range of the rotation moment control lever;
An instantaneous adjustment knob contacting the top of the instant bar and adjusting the rotational angle of the instant bar; And
And a movable support provided on the rotation moment control lever to support the instantaneous spring on the rotation moment control lever and movable in a direction in which the instantaneous spring is tensioned and compressed,
Wherein the instantaneous spring is composed of a tension coil spring having one end coupled to the armature and the other end coupled to the movable support,
Wherein the movable support portion includes a control screw coupled to the rotation moment control lever so as to extend in a tensioning direction of the instantaneous spring, and an instantaneous spring coupled to the control screw to be screwed to the control screw, And a movable holder reciprocable in a tensioning and compressing direction,
Wherein the adjustment range of the instantaneous spring is primarily adjusted through the instantaneous adjustment knob and the instantaneous spring, and the adjustment range of the instantaneous spring is secondarily adjusted through the adjustment screw and the movable holder. Of the trip device.
The method according to claim 1,
Wherein the movable support portion holds the moved position against the elastic restoring force of the instantaneous spring.
delete delete The method according to claim 1,
And a tool fastening groove is formed at one end of the adjusting screw so that a tool for rotating the adjusting screw can be fastened.
KR1020150151593A 2015-10-30 2015-10-30 Trip apparatus of mold case circuit breaker KR101829317B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150151593A KR101829317B1 (en) 2015-10-30 2015-10-30 Trip apparatus of mold case circuit breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150151593A KR101829317B1 (en) 2015-10-30 2015-10-30 Trip apparatus of mold case circuit breaker

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KR20170051657A KR20170051657A (en) 2017-05-12
KR101829317B1 true KR101829317B1 (en) 2018-02-20

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112382547B (en) * 2020-11-05 2023-10-17 美高电气科技有限公司 Thermomagnetic adjustable release
CN113707506B (en) * 2021-08-16 2024-08-09 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） Setting adjustment indicating mechanism for electromagnetic release

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200393291Y1 (en) * 2005-05-14 2005-08-22 엘에스산전 주식회사 A trip mechanism for molded cased circuit breaker
KR101276370B1 (en) * 2012-01-17 2013-06-18 현대중공업 주식회사 Circuit breaker

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200393291Y1 (en) * 2005-05-14 2005-08-22 엘에스산전 주식회사 A trip mechanism for molded cased circuit breaker
KR101276370B1 (en) * 2012-01-17 2013-06-18 현대중공업 주식회사 Circuit breaker

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