KR20150026333A - Gas insulated swithchgear - Google Patents

Abstract

The present invention relates to a gas insulated switchgear. The present invention includes: a first fixing contact; a second fixing contact which is disposed to be separated from the first fixing contact; a moving contact having one side to be in contact with the first contact and having the other side to be disposed to be moved between a contact location, where is in contact with the second fixing contact, and a separation location, which is separated; and a moving contact support unit which is formed on the moving contact and the second fixing contact, guides the movement of the moving contact when the contact location and the separation location of the moving contact are moved, and prevents the moving contact from being moved in a transverse direction. The present invention prevents the moving contact from being shaken by electromagnetic force.

Description

{GAS INSULATED SWITHCHGEAR}

The present invention relates to a gas insulated switchgear, and more particularly, to a gas insulated switchgear capable of suppressing the relative flow of a movable contact to a stationary contactor due to an interphase electromagnetic force.

As is well known, a gas insulated switchgear (GIS) is installed mainly for indoor and outdoor power plants and substations, and not only can open and close the load current artificially in normal use condition, Voltage power system that protects the power system and the power equipment by safely shutting off the current when it occurs.

The gas insulated switchgear includes various components such as a circuit breaker CB, a disconnector DS, a grounding switch ES and a current transformer CT and is installed in a metal enclosure or tank.

The inside of the tank of the gas insulated switchgear is filled with sulfur hexafluoride (SF ₆ ) gas having a high insulating force.

Fig. 1 is a view showing an example of a conventional gas insulated switchgear, and Fig. 2 is an enlarged view of the main part of Fig.

As shown in FIG. 1, the gas insulated switchgear includes an enclosure 10, a disconnector 20a and a ground switch 20b provided inside the enclosure 10.

The disconnecting switch 20a and the earthing switch 20b are provided with a first fixed contact 40 and a second fixed contact 50 spaced apart from each other and a second fixed contact 50 and a second fixed contact 50 And a movable contact 60 which is arranged so as to be selectively in contact with the movable contact 60.

The disconnecting switch 20a and the earthing switch 20b are respectively provided with driving devices 30a and 30b for driving the movable contact 60 between the contact position where the movable contact 60 contacts the second fixed contact 50 and the separated position do.

One end of each of the drive devices 30a and 30b is connected to the movable contactor 60 so as to be able to move relative to each other and the other end thereof is coupled to the pivot shaft 34, (35) for driving the rotary shaft (34) so as to rotate between a contact position where the movable contactor (60) contacts the second fixed contactor (50) and a separated position where the movable contactor do.

Each of the first fixed contactors 40 includes a first conductor 41 which receives and protrudes and retracts one end of the movable contactor 60 and a second conductor 41 which is provided at an end of the first conductor 41, And a plurality of first fixed contacts 43 contacting the outer surface of the first fixed contact 60.

Each of the first fixed contacts 43 is provided to extend and retract in the radial direction of the movable contact 60.

A plurality of contact pressure springs (for example, tension springs) 45 are provided on the outer surface of the first fixed contact 43 to apply elastic force to the first fixed contacts 43 in the radial direction so as to contract inward.

The second fixed contact 50 includes a second conductor 51 at one end of which the movable contact 60 can be inserted at a predetermined depth and a second conductor 51 at the end of the second conductor 51, And a plurality of second fixed contacts 53 which are in contact with the outer surface of the second fixed contacts 53.

Each of the second fixed contacts 53 is configured to expand and contract in the radial direction.

A plurality of contact pressure springs 45 are provided around the second fixed contacts 53 to apply an elastic force to the second fixed contacts 53 to contract inward.

In such a conventional gas insulated switchgear, the contact spring 60 is prevented from swinging due to the interphase electromagnetic force by the contact pressure spring 45, so that a compact Structure, the fluctuation of the movable contactor 60 due to the interphase electromagnetic force increases, so that the welding of the power contact portion can be greatly increased. As a result, the main circuit resistance value may exceed the specified value.

Further, in consideration of this, the pressing force of the contact pressure spring 45 can be increased, but in this case, the load is increased, so that the capacity (output) of the driving devices 30a and 30b can be increased.

In addition, the insulating performance may be deteriorated by metal foreign substances generated by welding of the current-carrying contact portions.

Since the movable contactor 60 is supported only by the elastic force of the contact pressure spring 45, the center of the movable contactor 60 can be released from the center of the second fixed contactor 50. [ The load of the driving devices 30a and 30b can be increased when the center of the movable contact 60 is separated from the center of the second fixed contact 50. [

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a gas insulated switchgear capable of suppressing the occurrence of rocking of a movable contact due to an interphase electromagnetic force.

Another object of the present invention is to provide a gas insulated switchgear capable of suppressing the occurrence of welding of the energized contact portion due to the swinging of the movable contact.

It is still another object of the present invention to provide a gas insulated switchgear capable of suppressing shift of the center of the movable contactor with respect to the stationary contactor.

In order to achieve the above object, the present invention provides a semiconductor device comprising: a first fixed contact; A second fixed contact disposed so as to be spaced apart from the first fixed contact; A movable contact movably disposed between a contact position where one side is in contact with the first stationary contact and the other side is in contact with the second stationary contactor and a separate position in which it is separated; And a movable contact support unit which is formed on the movable contact and the second fixed contact and guides the movement of the movable contact when the contact position of the movable contact and the disengaged position are moved and suppresses the lateral flow of the movable contact A gas insulated switchgear is provided.

Here, the movable contact support unit may include: a guide pin provided on any one of the movable contactor and the second fixed contactor; And a guide slot for relatively movably receiving the guide pin to the other one of the movable contactor and the second fixed contactor.

The guide pin may be provided in the second fixed contact, and the guide slot may be formed in the movable contact.

The guide pin includes: an insertion portion inserted into the guide slot; And a coupling portion extending from the insertion portion and coupled to the movable contactor or the second fixed contactor.

The guide pin may be configured to form a tool engagement portion to which the tool is coupled when the engagement portion is engaged and disengaged.

The entrance guide of the guide slot may be provided with an entrance guide portion whose width is reduced toward the center so as to guide the guide pin toward the center.

The movable contact support unit may include an internal support member interposed between the guide pin and the guide slot for restraining lateral movement of the movable contact while being relatively movable with respect to the outer surface of the guide pin or the inner surface of the guide slot .

The inner support member may be configured to be coupled to an outer surface of the guide pin.

The inner supporting member may have an inner diameter smaller than the outer diameter of the guide pin and an outer diameter larger than an outer diameter of the guide pin.

The inner support member has a tubular shape having a predetermined length in the axial direction. On the outer surface of the guide pin, an inner support portion recombination portion which is recessed along the radial direction and extends in the circumferential direction to receive the inner support member .

The second stationary contactor includes a second conductor at one end of which the movable contactor is received at a predetermined depth; And a second fixed contact disposed at an end portion of the second conductor so as to extend and retract along the radial direction and to contact the outer surface of the movable contact,

And the movable contact support unit comprises an external supporting member which is arranged to be spaced apart from the second fixed contact along the moving direction of the movable contact and contacts the outer surface of the movable contact to suppress the lateral flow of the movable contact .

The second conductor may be configured such that one side of the external support member is accommodated and the other side thereof is formed with an external support member accommodating portion protruding from the inner surface of the second conductor and receiving the external support member to be in contact with the outer surface of the movable contactor.

The external support member may have a trapezoidal cross section, and the external support member receiving portion may be formed such that the long side of the external support member is accommodated and the short side thereof is protruded to be in contact with the movable contact.

The outer support member receiving portion may be formed with an extended portion extended to allow the outer support member to be inserted or withdrawn.

As described above, according to the embodiment of the present invention, it is possible to provide the movable contact support unit for guiding the movement of the movable contact when the contact position of the movable contact and the movable position of the movable contact are moved and suppressing the lateral flow of the movable contact Thus, the fluctuation of the movable contact due to the momentary electromagnetic force can be suppressed. This makes it possible to suppress the occurrence of welding of the energized contact portion due to the swinging of the movable contact.

In addition, since the occurrence of welding is suppressed, it is possible to suppress the occurrence of deterioration in insulation performance due to metal foreign substances generated during welding.

It is also possible to restrain the center of the movable contactor from shifting relative to the fixed contactor, thereby suppressing an increase in the load of the drive device of the movable contactor caused by the deviation of the movable contactor from the center.

1 is a view showing an example of a conventional gas insulated switchgear,
Fig. 2 is an enlarged view of the main part of Fig. 1,
3 is a cross-sectional view of a gas insulated switchgear according to an embodiment of the present invention,
Figure 4 is an enlarged view of the disconnector area of Figure 3,
5 is an enlarged view of the main part of Fig. 4,
6 is an enlarged view of the guide pin 4,
Figure 7 is a cross-sectional view of the inner support member of Figure 4,
8 is a perspective view of the inner support member of Fig. 7,
Fig. 9 is a sectional view of the external supporting member of Fig. 4 in the engaged state,
10 is a partial cutaway cross-sectional view of a second stationary contactor showing the outer support member receiving portion of Fig.

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

As shown in FIG. 3, the gas insulated switchgear according to an embodiment of the present invention includes a first stationary contactor 140; A second stationary contactor 150 disposed to be spaced apart from the first stationary contactor 140; A movable contact (160) movably disposed between a contact position where one side is in contact with the first stationary contact (140) and the other side is in contact with the second stationary contact (150) and between the separated positions; And movable contactor 160 and second fixed contactor 150 to guide movement of movable contactor 160 when the movable contactor 160 is moved to the contact position and separation position, And a movable contact support unit 170 for inhibiting lateral flow of the movable contact.

The gas insulated switchgear of the present embodiment may include an enclosure 110 and a disconnector 120a and a ground switch 120b provided in the enclosure 110. [

Insulation material (insulating gas) may be filled in the inside of the enclosure 110.

The disconnecting switch 120a and the grounding switch 120b may include, for example, a first fixed contact 140; A second stationary contactor 150 disposed to be spaced apart from the first stationary contactor 140; A movable contact (160) movably disposed between a contact position where one side is in contact with the first stationary contact (140) and the other side is in contact with the second stationary contact (150) and between the separated positions; And movable contactor 160 and second fixed contactor 150 to guide movement of movable contactor 160 when the movable contactor 160 is moved to the contact position and separation position, And a movable contact support unit 170 for inhibiting the lateral flow of the movable contact.

A contact position where the movable contactor 160 contacts the second fixed contactor 150 and a contact position where the movable contactor 160 is separated from the second fixed contactor 150 And driving devices 130a and 130b for driving the positions can be provided, respectively.

Each of the driving devices 130a and 130b includes a driving lever 132 having one end connected to the movable contactor 160 so as to be able to move relative to the movable contactor 160 and the other end rotating about a pivot shaft 134, And an actuator 135 for generating a driving force for rotating the rotating shaft 134 of the driving motor 132. Here, the actuator 135 may be configured to pivot the drive lever 132 such that the movable contact 160 can be moved between the contact position and the release position.

4, the first fixed contactor 140 includes a first conductor 141 in which the movable contactor 160 is movably received, a second conductor 141 that is connected to the first conductor 141, And a plurality of first fixed contacts 143 provided at the ends of the movable contacts 160 and contacting the outer surfaces of the movable contacts 160, respectively.

In the first conductor 141, for example, a movable contact receiving portion 142 may be formed in which the movable contactor 160 is slidably received along the axial direction.

Each of the first fixed contacts 143 may be radially disposed and spaced apart from each other along the circumferential direction of the movable contact 160.

A contact spring 145 may be provided on the outer side of the first stationary contact 143 to apply an elastic force to the first stationary contact 143 so that the first stationary contact 143 contacts the outer surface of the movable contact 160.

The contact spring 145 may be implemented as a tension spring.

The contact spring 145 may be formed of a plurality of (for example, two) contact springs.

A shield member 147 may be provided on the outer side of the first fixed contact 143.

The second fixed contactor 150 includes a second conductor 151 formed on one side of the movable contactor 160 so that one side of the movable contactor 160 is inserted therein and a second conductor 151 on the end of the second conductor 151, And a plurality of second fixed contacts 153 that are in contact with the outer surface of the first fixed contact 153.

A movable contact receiving portion 152 may be formed at one end of the second conductor 151 so that one end of the movable contact 160 can be inserted (accommodated) to a predetermined depth.

A contact spring 145 may be provided on the outer side of the second fixed contact 153 to apply an elastic force to the second fixed contact 153 so as to contact the outer surface of the movable contact 160.

The contact spring 145 may be a tension spring.

The contact pressure spring 145 may be composed of a plurality of (two) contact springs.

A shield member 147 may be provided on the outer side of the second fixed contact 153.

An insulating cap 148 may be provided at a central region of each of the shield members 147.

The movable contactor 160 and the second fixed contactor 150 guide the movement of the movable contactor 160 when the movable contactor 160 is in the contact position and the separated position, A movable contact support unit 170 for suppressing the lateral flow may be provided.

5, the movable contact support unit 170 includes a guide pin 171 provided on one of the movable contactor 160 and the second fixed contactor 150, And a guide slot 190 for receiving the guide pin 171 relative to the other one of the first fixed contact 160 and the second fixed contact 150.

The guide pin 171 may be provided on the second fixed contact 150, for example.

The guide slot 190 may be formed in the movable contact 160, for example.

As shown in FIG. 6, the guide pin 171 may include an insertion portion 172 inserted into the guide slot 190; And a coupling portion 174 extending from the insertion portion 172 and coupled to the movable contactor 160 or the second fixed contactor 150. [

The insertion portion 172 may have a relatively long length as compared with the coupling portion 174.

The engaging portion 174 may include a male screw portion 179, for example.

The second fixed contact 150 may be provided with a female thread 154 so that the male thread 179 of the coupling part 174 can be threaded.

The female threaded portion 154 may be formed along the axial direction in the movable contact receiving portion 152 of the second conductor 151.

The guide pin 171 may be configured to have a tool engaging portion 177 for engaging the tool when the engaging portion 174 is engaged or disengaged.

The tool engagement portion 177 may be formed at the distal end of the insertion portion 172, for example.

The tool engaging portion 177 may be configured to have flat surfaces parallel to each other on the outer surface so that, for example, a spanner (not shown) can be engaged. The tool engagement portion 177 may be configured to have, for example, a rectangular cross section or a hexagonal cross section. Here, the tool engaging portion 177 may be embodied as a groove (e.g., a wrench groove) into which an end of a tool (e.g., a hexagonal wrench (not shown)) can be inserted.

The guide pin 171 may be configured to have a flange portion 176 extended outward in a boundary region between the coupling portion 174 and the insertion portion 172.

The guide slot 190 may have an entrance guide 192 formed in the entrance area of the guide slot 190 such that the width of the guide slot 190 decreases toward the center so as to guide the guide pin 171 toward the center.

The inlet guide 192 may be configured to have, for example, an outwardly convex radius of curvature.

The movable contact support unit 170 is interposed between the guide pin 171 and the guide slot 190 and moves relative to the outer surface of the guide pin 171 or the inner surface of the guide slot 190, And an internal support member 210 for inhibiting lateral movement of the movable contactor 160. [

The inner support member 210 may be formed of an insulating material.

The inner support member 210 may be formed of a material having insulation performance and a small coefficient of friction.

The inner support member 210 may be formed of Teflon.

The inner support member 210 may be coupled to the outer surface of the guide pin 171, for example.

The inner support member 210 may be formed in a tube shape having a predetermined length in the axial direction, for example, as shown in FIG. 7 and FIG.

The inner supporting member 210 is formed such that the inner diameter Di is smaller than the outer diameter Dp of the guide pin 171 and the outer diameter Do is larger than the outer diameter Dp of the guide pin 171 .

An inner support portion recombining portion 178 may be formed on the outer surface of the guide pin 171 so as to be received in the radial direction to receive the inner support member 210 and to extend in the circumferential direction.

The movable contactor support unit 170 is disposed to be spaced apart from the second fixed contact 153 along the moving direction of the movable contactor 160 and contacts the outer surface of the movable contactor 160, And an external support member 220 for restraining the lateral flow of the fluid.

The external support member 220 may be formed of an insulating member.

The external support member 220 may be formed of a material having insulation performance and a small coefficient of friction.

The outer support member 220 may be formed of Teflon.

9, one side of the external supporting member 220 is accommodated in the second conductor 151, and the other side is protruded from the inner surface of the second conductor 151 by a predetermined width w And an external support member receiving portion 222 for receiving the external contact member 160 in contact with the outer surface of the movable contactor 160 may be formed.

The external support member 220 may have a trapezoidal cross section having a predetermined thickness t1 and a maximum width W1, for example.

The external support member receiving portion 222 may be formed such that the long side of the external support member 220 is accommodated and the short side of the external support member 220 protrudes to be in contact with the movable contactor 160.

The external support member receiving portion 222 may be formed in a circular ring shape inside the second fixed contactor 150.

The outer support member receiving portion 222 may include a groove portion 223 for accommodating the long side portion of the end face of the outer circumferential support member 220 and an opening portion opened to communicate with the groove portion 223 224).

As shown in FIG. 10, the external support member receiving portion 222 may be formed with an extended portion 226 extended to allow the external support member 220 to be inserted or withdrawn.

The extension 226 may have a width W2 and a thickness t2 corresponding to the maximum width W1 and the thickness t1 of the external support member 220 along the width direction of the opening 224, Can be cut out to extend to both sides of the opening 224, respectively.

With this configuration, when the guide pin 171 is to be coupled to the second fixed contact 150, the male screw portion 179 of the guide pin 171 is inserted into the female screw portion 154, A tool may be coupled to the engaging portion 177 so that the guide pin 171 is engaged.

When the drive lever 132 is pivoted about the pivot shaft 134 by the actuator 135, the movable contactor 160 contacts the contact position corresponding to the rotation of the drive lever 132, Can be moved to the disengaged position.

When the driving lever 132 is rotated to the contact position, the movable contact 160 may protrude toward the second fixed contact 150.

The movable contactor 160 continuously moves toward the second stationary contactor 150 and the distal end portion thereof is inserted into the movable contactor receiving portion 152. The tip of the guide pin 171 can be inserted into the guide slot 190. At this time, the tip of the guide pin 171 can be guided into the guide slot 190 by the entrance guide 192.

When the movable contact 160 is continuously moved, the inner support member 210 may be in sliding contact with the inner surface of the guide slot 190. Thus, by supporting both the outside and the inside of the movable contactor 160, it is possible to suppress the fluctuation of the movable contactor 160 when the movable contactor 160 generates a transverse flow due to an inter-phase electromagnetic force.

When the movable contactor 160 is continuously moved, the external support member 220 may contact the outer surface of the movable contactor 160. As a result, the outer surface of the movable contactor 160 is simultaneously supported by the second fixed contact 153 and the outer supporting member 220 spaced apart from the fixed contact, whereby the movable contactor 160 The fluctuation of the movable contact 160 can be suppressed when the lateral flow is generated.

Meanwhile, when the driving lever 132 is rotated to the disengaged position, the movable contactor 160 can be moved in a direction away from the second fixed contactor 150. At this time, the movable contactor 160 is supported by the second fixed contact 153 and the movable contactor support unit 170 so that when a lateral flow of the movable contactor 160 is generated due to an inter-phase electromagnetic force, (Lateral flow) of the movable contact 160 with respect to the movable contact 160 is suppressed, so that the occurrence of welding due to the lateral flow of the movable contact 160 can be suppressed.

The foregoing has been shown and described with respect to specific embodiments of the invention. However, the present invention may be embodied in various forms without departing from the spirit or essential characteristics thereof, so that the above-described embodiments should not be limited by the details of the detailed description.

Further, even when the embodiments not listed in the detailed description have been described, it should be interpreted broadly within the scope of the technical idea defined in the appended claims. It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

110: enclosure 120a:
120b: earthing switch 130a, 130b:
132: drive lever 134:
135: Actuator 140: First fixed contact
141: first conductor 143: first fixed contact
145: contact pressure spring 147: shield member
148: Insulation cap 150: Second fixed contact
151: second conductor 152: movable contactor accommodating portion
153: second fixed contact 154: female thread portion
160: movable contactor 170: movable contact support unit
171: guide pin 172:
174: engaging portion 176: flange portion
177: tool coupling portion 178: internal support portion recombination portion
179: male thread portion 190: guide slot
192: inlet guide part 210: inner supporting member
220: outer reed member 222: outer supporting member receiving portion
223: groove portion 224:
226:

Claims (14)

A first fixed contact;
A second fixed contact disposed so as to be spaced apart from the first fixed contact;
A movable contact movably disposed between a contact position where one side is in contact with the first stationary contact and the other side is in contact with the second stationary contactor and a separate position in which it is separated; And
A movable contact support unit which is formed on the movable contact and the second fixed contact, guides the movement of the movable contact when the contact position of the movable contact and the separated position are moved, and suppresses the lateral flow of the movable contact;
And a gas insulated switchgear. The movable contact support apparatus according to claim 1,
A guide pin provided on one of the movable contactor and the second fixed contactor; And
A guide slot for relatively movably receiving the guide pin on the other one of the movable contact and the second fixed contact;
Wherein the gas-insulated switchgear comprises: 3. The method of claim 2,
Wherein the guide pin is provided in the second fixed contact, and the guide slot is formed in the movable contact. 3. The method of claim 2,
The guide pin includes: an insertion portion inserted into the guide slot; And a coupling portion extending from the insertion portion and coupled to the movable contactor or the second fixed contactor. 5. The method of claim 4,
Wherein the guide pin is formed with a tool engaging portion to which a tool is engaged when engaging and disengaging the engaging portion. 3. The method of claim 2,
Wherein the inlet guide of the guide slot is provided with an inlet guide portion whose width is reduced toward the center so as to guide the guide pin toward the center. 3. The method of claim 2,
And the movable contact support unit includes an internal support member interposed between the guide pin and the guide slot for restraining a lateral flow of the movable contact while being relatively moved with an outer surface of the guide pin or an inner surface of the guide slot Gas insulated switchgear. 8. The method of claim 7,
Wherein the inner supporting member is coupled to the outer surface of the guide pin. 9. The method of claim 8,
Wherein the inner support member has an inner diameter smaller than the outer diameter of the guide pin and an outer diameter of the guide pin is larger than the outer diameter of the guide pin. 10. The method of claim 9,
Wherein the inner support member has a tube shape having a predetermined length in the axial direction,
Wherein an inner support portion recombining portion is formed on an outer surface of the guide pin, the inner support portion being recessed along the radial direction to receive the inner support member and extending in a circumferential direction. 11. The method according to any one of claims 1 to 10,
The second stationary contactor may include: a second conductor on one side of which the movable contact is received to a predetermined depth; And a second fixed contact disposed at an end portion of the second conductor so as to extend and retract along the radial direction and to contact the outer surface of the movable contact,
And the movable contact supporting unit includes an external supporting member which is disposed apart from the second fixed contact along the moving direction of the movable contact and contacts the outer surface of the movable contact to suppress the lateral flow of the movable contact Gas insulated switchgear. 12. The method of claim 11,
Wherein the second conductor is formed with an outer support member accommodating portion that accommodates one side of the outer support member and the other side of which protrudes from the inner surface of the second conductor and contacts the outer surface of the movable contactor. Device. 13. The method of claim 12,
Wherein the external support member has a trapezoidal cross section,
Wherein the external support member receiving portion is formed such that a long side of the external support member is received and a short side of the external support member is protruded to be in contact with the movable contact. 9. The method of claim 8,
Wherein the external support member accommodating portion is formed with an expanded portion that is extended so that the external support member can be inserted or withdrawn.

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