KR20170098626A - Interlock Device of Gas Insulated Load Break Switch - Google Patents

Interlock Device of Gas Insulated Load Break Switch Download PDF

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Publication number
KR20170098626A
KR20170098626A KR1020160020783A KR20160020783A KR20170098626A KR 20170098626 A KR20170098626 A KR 20170098626A KR 1020160020783 A KR1020160020783 A KR 1020160020783A KR 20160020783 A KR20160020783 A KR 20160020783A KR 20170098626 A KR20170098626 A KR 20170098626A
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KR
South Korea
Prior art keywords
interlock
main circuit
drive shaft
lever
operation hole
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Application number
KR1020160020783A
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Korean (ko)
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KR101793548B1 (en
Inventor
유광수
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엘에스산전 주식회사
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Priority to KR1020160020783A priority Critical patent/KR101793548B1/en
Publication of KR20170098626A publication Critical patent/KR20170098626A/en
Application granted granted Critical
Publication of KR101793548B1 publication Critical patent/KR101793548B1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/46—Interlocking mechanisms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/20—Interlocking, locking, or latching mechanisms
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

The present invention relates to an interlock device of a gas insulation load break switch and, more specifically, to an interlock device of a gas insulation load break switch which can perform a feeding operation only when an interlock key is coupled thereto by installing an interlock means on an interlock bar of a switch mechanism. According to an embodiment of the present invention, the interlock device of a gas insulation load break switch comprises: a main circuit drive shaft and a ground circuit drive shaft installed between a first and a second side plate to be separated; an interlock bar rotatably installed on the first side plate to selectively close a main circuit operation hole formed on one end of the main circuit drive shaft and a ground circuit operation hole formed on one end of the ground circuit drive shaft; and an interlock means which is installed on a portion of the first side plate and pushes the interlock bar to close the main circuit operation hole.

Description

[0001] The present invention relates to an interlock device for a gas insulated load switch,

The present invention relates to an interlock device of a gas insulated load switch, more particularly, to an interlock device of a gas insulated load switch which is provided with an interlock means in an interlock bar of a switch mechanism, .

Generally, a gas insulated load switch is used in a power supply system for a power distribution system or a power reception facility, and protects a line by shutting off a circuit when an accident current occurs in the circuit. A ring main unit is a power device in which a gas insulated load switch is installed. The ring main unit (RMU) is a device used for surveillance, control, and protection of electrical systems used for power distribution to the power supplied from power distribution. It is equipped with Circuit Breaker in a structure sealed and insulated by SF6 gas. Switches, switches, earth switches, and conductors. Here, the switch may be a load break switch.

A gas insulated load switch consists of one or more switches with a power line connected to each switch. The gas-insulated load switch of the power distribution system is composed of several circuits and functions to supply the power to the grid by branching and other gas insulated load switches to the load side of the grid line. However, in special cases, In some cases, faults may be received or supplied, in which case two different lines may not be inserted at the same time. Electrical and mechanical interlocking devices are required to prevent two different lines from being fed at the same time and being supplied at the same time

1 is a front view of a ring main unit according to the prior art. Here, the cover of the switch mechanism is removed. 2 is a perspective view of the switch mechanism 10 in FIG. Here, the switch may be a load break switch.

Referring to the ring main unit 1 according to the prior art, the switch mechanism 10 is provided for operating the main circuit portion and the ground circuit portion. The switch mechanism 10 is provided with a pair of side plates 11 and 12 and a pair of side plates 11 and 12 which are spaced apart from each other to open and close the main circuit drive shaft 20 and the ground circuit A ground circuit drive shaft 30 is provided. Here, the main circuit drive shaft 20 and the ground circuit drive shaft 30 are rotated in the clockwise direction or the counterclockwise direction by the handle 5 to be placed in the input or open state.

A main circuit operation hole 23 is formed at one end of the main circuit drive shaft 20 and a ground circuit operation hole 33 is formed at one end of the ground circuit drive shaft 30. A first projecting portion 24 is formed on one side of the main circuit operation hole 23 and a first cut portion 22 is formed on the other side. A second projecting portion 34 is formed on one side of the grounding circuit operation hole 33 and a second cutout portion 32 is formed on the other side.

An interlock bar (40) is provided for preventing the main circuit and the grounding circuit from being simultaneously turned on. The interlock bar 40 is rotatably provided on the interlock shaft 45 and is provided with a main circuit lever 42 and a ground circuit lever 43 on the ends of the pivot portion 41 formed in a V- . A handle insertion groove 44 is formed in a part of the grounding circuit lever 42.

3 to 5 show the operation of the switch mechanism according to the prior art. Fig. 3 shows a state in which the main circuit part is closed, Fig. 4 shows a state in which the main circuit part is opened, and Fig.

3 shows a state in which the main circuit unit is turned on. When the main circuit drive shaft 20 is rotated in the closing state (the position where the first projection 24 is directed to the left) by using the handle 5, the main circuit portion is placed in the closing state. At this time, the first projection 24 pushes the main circuit lever 42 so that the interlock bar 40 is rotated in the clockwise direction. The grounding circuit lever 43 is inserted into the second cutout portion 32 of the grounding circuit drive shaft 30 to prevent the grounding circuit drive shaft 30 from rotating. That is, the ground circuit drive shaft 30 is placed in the open state. At this time, the return spring 49 also serves to pull the ground circuit lever 43 toward the ground circuit drive shaft 30.

4 shows a state in which the main circuit unit is opened. When the main circuit drive shaft 20 is rotated in the open state (the position where the first projecting portion 24 is directed to the right side) using the handle 5, the main circuit portion is placed in the open state. At this time, the interlock bar 40 is in the position where the ground circuit lever 43 is pulled by the return spring 49 and inserted into the second cut portion 32, so that the ground circuit portion is in an open state without movement.

Fig. 5 shows a state in which the grounding circuit is turned on. When the ground circuit drive shaft 30 is rotated by inserting the handle 5 into the ground circuit operation hole 33, the ground circuit portion is switched to the charged state (the position where the second projecting portion 34 faces the left). At this time, since the handle insertion groove 44 is formed in the shape of a conical groove, when the handle is inserted, the interlock bar 40 is pushed counterclockwise. Then, the interlock bar 40 is rotated by a predetermined angle counterclockwise while being pushed by the second projecting portion 34. The main circuit lever 42 is inserted into the first cutout portion 22 of the main circuit drive shaft 20 to prevent the main circuit drive shaft 20 from being inserted.

As described above, in the conventional art, an interlock function is provided to prevent the input of the main circuit and the input operation of the grounding circuit at the same time in one mechanism. However, if any one of the two different mechanisms is turned on, A mechanical interlock is not implemented to prevent it from performing.

However, a gas insulated load switch used in a power supply system for a power distribution system and a power switch is composed of two or more switches, and a separate power line is connected to each switch. In some cases, There is a case that another line should not be inputted at the same time. Electrical and mechanical interlocks are required to prevent two different lines from being fed at the same time and being supplied simultaneously

That is, in the case of a gas insulated load switch, two switch mechanisms may be connected to different lines, respectively. In this case, an interlock device is required to prevent the two switch mechanisms from being simultaneously applied. The simultaneous closing prevention interlock device for the mechanical (manual) operation is not developed.

It is an object of the present invention to provide an interlock device for a gas insulated load switch which is provided with an interlock means in an interlock bar of a switch mechanism so that the closing operation can be performed only when the interlock key is engaged will be.

An interlock device of a gas insulated load switch according to an embodiment of the present invention includes a main circuit drive shaft and a ground circuit drive shaft spaced apart from each other between a first side plate and a second side plate; An interlock bar rotatably installed on the first side plate so as to selectively close a main circuit operation hole formed at one end of the main circuit drive shaft and a ground circuit operation hole formed at one end of the ground circuit drive shaft; And interlock means provided at a part of the first side plate and capable of closing the main circuit operation hole by pushing the interlock bar.

Here, the interlock means may include: an interlock housing provided on the first side plate; An interlock body rotatably inserted into the interlock housing; An interlock lever coupled to one side of the interlock body to pivot the interlock lever; And an interlock key coupled to the interlock body to rotate the interlock lever.

The front plate may further include a front plate provided on one side of the first side plate so as to cover the interlock bar. The front plate may have a first through hole through which the main circuit operation hole can be exposed, And a third through hole through which the interlocking means can be partially exposed.

Further, the interlock lever is formed such that the interlock bar can close the main circuit operation hole when the interlock lever is in a horizontal state.

And the interlock key can not be separated from the interlock body when the interlock lever is in the vertical position and the interlock key can be separated from the interlock body when the interlock lever is in the horizontal position.

According to the interlock device of the gas insulated load switch according to the embodiment of the present invention, the same interlocking means is applied to two or more switchgear mechanisms, and only one interlock key is provided so that the interlocking operation can be performed only when the interlock key is engaged So that it is possible to prevent the two mechanisms from being inserted at the same time.

1 is a front view of a ring main unit according to the prior art.
2 is a perspective view of the switch mechanism of the gas insulated load switch applied to Fig.
Figs. 3, 4 and 5 are diagrams illustrating the operation of the switch mechanism of the gas insulated load switch according to the prior art, respectively, showing the main circuit part closing state, the main circuit part opening state, and the ground circuit part closing state.
6 is a perspective view of a switch mechanism applied to a gas insulated load switch according to an embodiment of the present invention.
7 and 8 are a perspective view and a front view showing a state in which the front plate is removed in FIG.
FIGS. 9 and 10 are operational views of a switch mechanism applied to a gas insulated load switch according to an embodiment of the present invention, and are a perspective view and a front view, respectively, of a main circuit lock state.
11 is an operational view of a switch mechanism applied to a gas insulated load switch according to an embodiment of the present invention, which is a front view of a state in which the main circuit is turned on.
12 and 13 are perspective views of interlocking means applied to an interlock device of a gas insulated load switch according to an embodiment of the present invention, respectively, showing a locked state and an open state.
Fig. 14 is an operational view of a switch mechanism applied to a gas insulated load switch according to an embodiment of the present invention. In the two mechanisms, the first mechanism shows a state in which the main circuit is charged, and the second mechanism shows a state in which the main circuit is locked.
Fig. 15 is an operational view of a switch mechanism applied to a gas insulated load switch according to an embodiment of the present invention. In the two mechanisms, a first mechanism represents a main circuit portion open state and a second mechanism represents a main circuit portion open state.
16 is an operational view of a switch mechanism applied to a gas insulated load switch according to an embodiment of the present invention. In the two mechanisms, the second mechanism represents the main circuit part open state and the first mechanism represents the main circuit part put state.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, which are intended to illustrate the present invention in a manner that allows a person skilled in the art to easily carry out the invention. And does not mean that the technical idea and scope of the invention are limited.

FIG. 6 is a perspective view of a switch mechanism applied to a gas insulated load switch according to an embodiment of the present invention, and FIGS. 7 and 8 are a perspective view and a front view, respectively, with the front plate removed in FIG. The interlock device of the gas insulated load switch according to each embodiment of the present invention will be described in detail with reference to the drawings. In the drawings, the same reference numerals are used for the same components as those of the prior art.

The interlock device of the gas insulated load switch according to an embodiment of the present invention includes a main circuit drive shaft 20 and a ground circuit drive shaft 30 which are installed between the first side plate 11 and the second side plate 12 so as to be spaced apart from each other. A main circuit operation hole 23 formed at one end of the main circuit drive shaft 20 and a ground circuit operation hole 33 formed at one end of the ground circuit drive shaft 30 are selectively closed, An interlock bar (40) rotatably installed on the body (11); And interlocking means (50) provided at a part of the first side plate (11) and capable of closing the main circuit operation hole (23) by pushing the interlocking bar (40).

Here, the interlocking means (50) includes an interlock housing (51) installed on the first side plate (11); An interlock body 52 rotatably inserted into the interlock housing 51; An interlock lever 53 coupled to one side of the interlock body 52 to rotate the interlock bar 40; And an interlock key 54 coupled to the interlock body 52 to rotate the interlock lever 53.

The switch mechanism 10 is constituted by a pair of side plates 11 and 12 and a mechanism portion provided between the pair of side plates 11 and 12. A pair of side plates 11 and 12 are provided with a main circuit drive shaft 20 for inputting or opening the main circuit unit and a ground circuit drive shaft 30 for inputting or opening the ground circuit unit. The main circuit drive shaft 20 and the ground circuit drive shaft 30 are put in the open or the open state as they are rotated clockwise or counterclockwise at a predetermined angle (for example, 180 degrees). At this time, the main circuit drive shaft 20 and the ground circuit drive shaft 30 may be rotated by a handle (see FIG. 2).

The main circuit drive shaft 20 is responsible for inputting or opening of the main circuit portion. The end of the main circuit drive shaft 20 protrudes to one side of the first side plate 11 so that the main circuit drive shaft 20 can be rotated. At the end of the main circuit drive shaft 20, a main circuit operation hole 23 is formed so that the handle can be inserted.

The end of the main circuit drive shaft 20 is partially cut to form an arc. The portion cut at the end of the main circuit drive shaft 20 will be referred to as a first cut portion 22. A main circuit lever 42 to be described later may be inserted into the first incision part 22. [ On the other hand, the portion left without being cut at the end of the main circuit drive shaft 20 will be referred to as a first protrusion 24.

The ground circuit drive shaft 30 is responsible for input or release of the ground circuit. In order to rotate the ground circuit drive shaft 30, the end of the ground circuit drive shaft 30 protrudes to one side of the first side plate 11. At the end of the ground circuit drive shaft 30, a ground circuit operation hole 33 is formed along the axial direction so that the handle can be inserted.

The end portion of the ground circuit drive shaft 30 is partly cut to form an arc. The portion cut at the end of the grounding circuit drive shaft 30 will be referred to as a second cutout 32. [ A grounding circuit lever 43 to be described later may be inserted into the second cutout portion 32. On the other hand, a portion left without being cut at the end of the ground circuit drive shaft 20 is referred to as a second projection 34. [

The interlock bar (40) is rotatably installed on the interlock shaft (45). The interlock bar 40 is selectively inserted into the first cutout portion 22 or the second cutout portion 32 to close any one of the main circuit operation hole 23 or the grounding circuit operation hole 33 .

The interlock bar 40 includes a rotary part 41 rotatably installed on the interlock shaft 45 and a second rotary part 41 extending from one side of the rotary part 41 so as to be insertable into the first cut part 22 of the main circuit drive shaft 20 And a grounding circuit lever 43 extending from the other side of the turning portion 41 so as to be insertable into the second cutout portion 32 of the grounding circuit drive shaft 30. [

A return spring 49 is provided at the end of the ground circuit lever 43. The return spring 49 is fixed to a spring bracket 48 whose one end is fixed to the terminating end of the grounding circuit lever 43 and the other end is provided on a part of the first side plate 11 to rotate the interlocking bar 40 clockwise Thereby providing a pulling force.

The front plate 13 may be spaced apart from one side of the first side plate 11. The front plate 13 may be formed to have a width enough to cover the interlock bar 40. The front plate 13 is provided with a first through hole 14 through which the main circuit operation hole 23 can be exposed, a second through hole 15 through which the ground circuit operation hole 33 can be exposed, May be formed in the third through hole 16, as shown in FIG.

Interlock means 50 may be provided on one side of the main circuit lever 42. In one embodiment of the interlock means 50, the interlock means 50 may comprise an interlock housing 51, an interlock body 52, an interlock lever 53, and an interlock key 54 , 13).

The interlock housing 51 may be formed as a circular tube. The interlock body 52 is formed in a cylindrical shape and is rotatably installed inside the interlock housing 51. The interlock body 52 may be composed of a lock. A key groove 52a may be formed in a part of the interlock body 52. The interlock lever 53 is coupled to one side of the interlock body 52 to be rotatable together with the interlock body 52. At this time, it is preferable that the length of the interlock lever 53 is formed to be long enough to push the interlock bar 40 to close the main circuit operation hole 23 when the interlock lever 53 is in the horizontal state. The interlock lever 53 may be coupled to the interlock body 52 with a washer or nut 55 therebetween.

The interlock key 54 can be fitted into the key groove 52a of the interlock body 52. [ The interlock key 54 is fitted in the interlock body 52 and rotates in the counterclockwise direction so that when the interlock lever 53 is oriented in the vertical direction as shown in FIG. 13, the interlock key 54 can not come out of the interlock body 52 , And can be separated from the interlock body 52 when the interlock lever 53 is oriented in the horizontal direction as shown in FIG. 12 (interlock means release state).

8, 10 and 11, the operation of the interlock device of the gas insulated load switch according to the embodiment of the present invention will be described.

When the switching mechanism 10 is in the main circuit open state, the interlock key 54 can be turned freely to bring the interlock means 50 into the locked state or the unlocked state. That is, by interlocking the interlock key 54 in the counterclockwise or clockwise direction, the interlocking means 50 is locked as shown in FIG. 8, that is, the interlock lever 53 is in the vertical position, The interlock lever 53 can be switched to the horizontal position. At this time, when the interlock lever 53 is in the vertical position as shown in FIG. 8, the main circuit operation hole 23 is not closed, so that the main circuit can be switched to the closing state. In addition, when the interlock lever 53 is in the horizontal position as shown in Fig. 10, the main circuit operation hole 23 is closed and it is impossible to switch the main circuit to the closing state.

11, the first projecting portion 24 of the main circuit operation hole 23 is rotated by 180 degrees to move to the left side, and the interlock bar 40 is pushed to the left side as the main circuit of the switching mechanism 10 is turned on do. In this case, even if an attempt is made to turn the interlock key 54 clockwise to turn the interlock means 50 into the unlocked state, the interlock lever 53 is restrained by the interlock lever 40 and does not rotate. That is, the interlock key 54 is not separated from the interlock body 52 since the interlock means 50 is not switched to the unlocked state.

14 to 16, an example in which an interlock device of a gas insulated load switch according to an embodiment of the present invention is applied to two switch mechanisms will be described. Here, the two switch mechanisms will be referred to as a first mechanism 10 and a second mechanism 110, respectively. The first mechanism 10 and the second mechanism 110 may be configured in the same manner. However, the first mechanism 10 and the second mechanism 110 may be configured to use a single interlock key 54.

14, if the first mechanism 10 is in the main circuit charging state and the second mechanism 110 is in the main circuit opening state, the interlock key 54 is interlocked with the first Is coupled to the mechanism (10).

Here, the first mechanism 10 is switched to the open state and the main circuit of the second mechanism 110 is attempted to be switched to the input state. When the main circuit of the second mechanism 110 is to be turned on, the main circuit is first opened by inserting a handle into the main circuit operation hole 23 of the first mechanism 10 (FIG. 15). Thereafter, the interlock key 54 is rotated to cause the interlock lever 53 to be in the horizontal position to disengage the interlock key 54. At this time, the interlock bar (40) is rotated to close the main circuit operation hole (23) of the first mechanism (10) and to prevent the main circuit from being inserted. The interlock lever 150 is then inserted into the interlocking means 150 of the second mechanism 110 so that the interlock lever 153 is in the vertical position to release the restraint to the interlock 140. The interlock key 54 is in engagement with the interlock means 150 of the second mechanism 110. Thereafter, the handle is inserted into the main circuit operation hole 123 of the second mechanism 110 to perform the closing operation (Fig. 16).

In order to make the main circuit of the first mechanism 10 operative again in this state, the handle must be fitted in the main circuit operation hole 23, so that the interlock means 40 is locked, that is, the interlock lever 53 is in the vertical position And an interlock key 54 is required. Therefore, after switching the second mechanism 110 to the main circuit open state, the interlock means 150 is switched to the locked state, that is, the interlock lever 153 is switched to the horizontal position to separate the interlock key 54, The interlock means 50 of the first mechanism 10 must be rotated so that the interlock lever 53 is in the vertical position.

That is, in order to perform the closing operation of the main circuit of the first mechanism 10, the interlock lever 53 is switched to the horizontal position while the second mechanism 110 is opened, the interlock key 54 is pulled out, The interlock lever 53 is inserted into the interlocking means 50 of the mechanism 10 and the handle is inserted into the main circuit operation hole 23 to perform the closing operation.

As a result, in order to input any one of the two switch mechanisms constituted by the interlock device of the gas insulated load switch according to the embodiment of the present invention, the interlock key (54) must be released from the locked state of the interlock means (50, 150) , Only one interlock key 54 can be used at this time, so the other mechanism must be kept open.

According to the interlock device of the gas insulated load switch according to the embodiment of the present invention, it is possible to prevent a plurality of switch mechanisms from being simultaneously applied to two or more switch mechanisms.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the scope of the present invention but to limit the scope of the technical idea of the present invention. That is, the scope of protection of the present invention should be construed according to the following claims, and all technical ideas which are within the scope of the same should be interpreted as being included in the scope of the present invention.

10 Actuator Mechanism 11 1st shroud
12 second side plate 13 front plate
14 first through hole 15 second through hole
16 3rd through hole 20 Main circuit drive shaft
22 1st cut section 23 Main circuit operation hole
24 1st protrusion 30 Ground circuit drive shaft
32 2nd cutout 33 Ground circuit operation hole
34 2nd protrusion 40 Interlock bar
41 times East 42 main circuit lever
43 Ground circuit lever 45 Interlock shaft
48 Spring Bracket 49 Return Spring
50 interlock means 51 interlock housing
52 interlock body 52a key groove
53 Interlock lever 54 Interlock key
55 nut

Claims (5)

A main circuit drive shaft and a ground circuit drive shaft spaced apart from each other between the first side plate and the second side plate;
An interlock bar rotatably installed on the first side plate so as to selectively close a main circuit operation hole formed at one end of the main circuit drive shaft and a ground circuit operation hole formed at one end of the ground circuit drive shaft;
And interlock means provided at a part of the first side plate and capable of pushing the interlock bar to close the main circuit operation hole. 2. The apparatus according to claim 1,
An interlock housing provided on the first side plate;
An interlock body rotatably inserted into the interlock housing;
An interlock lever coupled to one side of the interlock body to pivot the interlock lever;
And an interlock key coupled to the interlock body to pivot the interlock lever. [2] The apparatus according to claim 1, further comprising a front plate provided on one side of the first side plate so as to cover the interlock bar, wherein the front plate includes a first through hole through which the main circuit operation hole can be exposed, A second through-hole through which the operation hole is exposed, and a third through-hole through which the interlocking means is partially exposed. The interlock device of a gas insulated load switch according to claim 2, wherein the interlock lever is formed to have a length that allows the interlock bar to close the main circuit operation hole when the interlock lever is in a horizontal state. 3. The apparatus of claim 2, wherein the interlock key is not detachable from the interlock body when the interlock lever is in the vertical position and the interlock key is detachable from the interlock body when the interlock lever is in the horizontal position Characterized by an interlock device of a gas insulated load switch.
KR1020160020783A 2016-02-22 2016-02-22 Interlock Device of Gas Insulated Load Break Switch KR101793548B1 (en)

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Application Number Priority Date Filing Date Title
KR1020160020783A KR101793548B1 (en) 2016-02-22 2016-02-22 Interlock Device of Gas Insulated Load Break Switch

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Application Number Priority Date Filing Date Title
KR1020160020783A KR101793548B1 (en) 2016-02-22 2016-02-22 Interlock Device of Gas Insulated Load Break Switch

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190095033A (en) * 2018-02-06 2019-08-14 엘에스산전 주식회사 Locking device for Switch gear
KR20200008613A (en) * 2017-07-24 2020-01-28 미쓰비시덴키 가부시키가이샤 Interlock device and switchgear system of switchgear

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101119744B1 (en) * 2011-02-24 2012-03-22 엘에스산전 주식회사 Circuit breaker with earthing member locking unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200008613A (en) * 2017-07-24 2020-01-28 미쓰비시덴키 가부시키가이샤 Interlock device and switchgear system of switchgear
KR20190095033A (en) * 2018-02-06 2019-08-14 엘에스산전 주식회사 Locking device for Switch gear

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