KR101687722B1 - Locking Device of Load Break Switch - Google Patents

Locking Device of Load Break Switch Download PDF

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Publication number
KR101687722B1
KR101687722B1 KR1020150187745A KR20150187745A KR101687722B1 KR 101687722 B1 KR101687722 B1 KR 101687722B1 KR 1020150187745 A KR1020150187745 A KR 1020150187745A KR 20150187745 A KR20150187745 A KR 20150187745A KR 101687722 B1 KR101687722 B1 KR 101687722B1
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KR
South Korea
Prior art keywords
plate
ground
main circuit
drive shaft
operation hole
Prior art date
Application number
KR1020150187745A
Other languages
Korean (ko)
Inventor
유련
Original Assignee
엘에스산전 주식회사
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Filing date
Publication date
Application filed by 엘에스산전 주식회사 filed Critical 엘에스산전 주식회사
Priority to KR1020150187745A priority Critical patent/KR101687722B1/en
Application granted granted Critical
Publication of KR101687722B1 publication Critical patent/KR101687722B1/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
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H01H33/121—Load break switches
    • 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
    • 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
    • H02B13/075—Earthing arrangements

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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 a device for locking a gas insulation load break switch to a ground position, and more particularly, to a device for locking a gas insulation load break switch to a ground position, which is capable of setting a locking state such that the gas insulation load break switch is prevented from being arbitrarily opened or performing a loading operation and is opened or broken by using a key. According to an embodiment of the present invention, a device for locking a gas insulation load break switch includes: a main circuit driving shaft and a ground circuit driving shaft protruding from a side plate; an interlock bar for selectively closing a main circuit operation hole and a ground circuit operation hole, wherein the main circuit operation hole is formed by penetrating an end of the main circuit driving shaft and the ground circuit operation hole is formed by penetrating an end of the ground circuit driving shaft; a front plate spaced apart from the side plate and installed to cover the interlock bar; a connection plate slidably coupled to the front plate and moving while making contact with the interlock bar; a sliding plate slidably coupled to the front plate to open or close the ground circuit operation hole in a grounding state; and a rotation shaft rotatably installed on the front plate and linearly moving the sliding plate when being released from the connection plate.

Description

{Locking Device of Load Break Switch}

The present invention relates to a ground position locking apparatus for a gas insulated load switch, and more particularly, to a ground position locking apparatus for a gas insulated load switch that can not be opened or closed arbitrarily in a grounded state of a gas insulated load switch, To a ground position lock of a gas insulated load switch.

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 ground circuit lever 43.

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.

In the gas insulated load switch according to the related art, an interlock is configured to prevent the input of the main circuit and the input of the ground circuit at the same time in a single mechanism as described above. However, there is a need to maintain the grounding state in relation to other mechanisms located far away, or it is necessary to set the locking state of the grounding circuitry so that only the safety manager with input authority can open the grounding circuit. Other Mechanisms at Long Distances There is a risk of accidents if the gas insulated load switch is inserted at random due to an error in communication with the operator.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a gas insulated load switch which can not be opened or closed arbitrarily in a grounded state and can be set to a locked state And to provide a ground position locking device for a gas insulated load switch.

A ground position locking device for 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 protruding from a side plate; A main circuit operation hole penetratingly formed at an end of the main circuit drive shaft and a ground circuit operation hole penetratingly formed at an end of the ground circuit drive shaft; A connecting plate slidably coupled to the front plate and moving in contact with the interlock bar; and a front plate disposed to be spaced apart from the side plate so as to cover the interlock bar. A sliding plate slidably coupled to the front plate and configured to close or open the ground circuit operation hole in a grounded state; And a pivot shaft rotatably installed on the front plate and linearly moving the sliding plate when the connection plate releases its restraint.

Here, the front plate may have first and second sliding holes through which the connecting plate or the sliding plate can be slidably coupled.

In addition, the connecting plate is formed with a leg portion which is in contact with the interlock bar and can receive a contact force.

Further, the leg portion is provided with a roller.

In addition, the connecting plate is provided with a support for supporting the movement of the sliding plate.

Further, the sliding plate is characterized in that a closing portion capable of closing the grounding circuit operating hole is formed to protrude from the sliding plate.

A lock lever is protruded from the rotation shaft, and a slit is formed in the lock lever.

Further, a lock protrusion for restricting the movement of the lock lever is formed on the lower side of the support portion.

Further, the sliding plate is provided with a fitting protrusion that is inserted into the slit and is supplied with power.

In addition, a fixing bracket for fixing the pivot shaft is further included.

Further, the rotary shaft is formed of a lock, and further includes a key for closing or opening the lock.

According to the ground position locking device of the gas insulated load switch according to the embodiment of the present invention, the ground circuit portion can be set to the locked state at the ground position, thereby preventing any unauthorized opening operation of the unauthorized person.

In addition, when the vehicle is not in the ground state, the vehicle is not set to the locked state, thereby preventing unnecessary malfunction.

1 is a front view of a gas insulated load switch according to the prior art.
2 is a perspective view of a switch mechanism of a gas insulated load switch according to the prior art;
FIG. 3 is a functional diagram of a switch mechanism of a gas insulated load switch according to the prior art, and shows a state in which the main circuit is turned on.
Fig. 4 is an operational view of a switch mechanism of a gas insulated load switch according to the prior art, and shows the main circuit part opened state.
Fig. 5 is a functional diagram of a switch mechanism of a gas insulated load switch according to the prior art, and shows a state of putting the ground circuit section.
6 is a perspective view of a switch mechanism applied to an interlock device of a gas insulated load switch according to an embodiment of the present invention.
7 is a perspective view showing a state in which the front plate is removed in Fig.
8 is a rear perspective view of the front plate in Fig.
Figure 9 is an exploded perspective view of the major components in Figure 6;
10, 11, and 12 are diagrams illustrating the operation of the ground position locking device of the gas insulated load switch according to the embodiment of the present invention, respectively, showing the open state, the closing state, and the locking state of the ground circuit.

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 ground position locking device of a gas insulated load switch according to an embodiment of the present invention, Fig. 7 is a perspective view of the state in which the front plate is removed, Fig. 8 is a rear perspective view of the front plate, Is an exploded perspective view. Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

The ground position locking 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 protruding from the side plate 11; A main circuit operation hole 23 formed through an end of the main circuit drive shaft 20 and a ground circuit operation hole 33 formed through an end of the ground circuit drive shaft 30, 40); A front plate 13 spaced apart from the side plate 11 so as to cover the interlock bar 40; A connecting plate (50) slidably coupled to the front plate (13) and moving in contact with the interlock bar (40); A sliding plate (60) slidably coupled to the front plate (13) and closing or opening the ground circuit operation hole (33) in a grounded state; And a rotating shaft 70 rotatably installed on the front plate 13 and capable of linearly moving the sliding plate 60 when the constraining by the connecting plate 50 is released .

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. The switchgear mechanism 10 includes 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 driving shaft 20 of the main circuit driving shaft 20 protrudes to one side of the first side plate 11 so that the main circuit driving shaft 20 can be rotated.

At the end of the main circuit drive shaft 20, a main circuit operation hole 23 is formed along the axial direction so that the handle can be inserted.

The end of the main circuit drive shaft 20 is partially cut to form an arc. A portion cut at the end of the main circuit drive shaft 20 is referred to as a first cut portion 22 and a remaining portion is referred to as a first projected portion 24. A main circuit lever 42 to be described later may be inserted into the first incision part 22. [

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 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 of the ground circuit drive shaft 30 is partly cut out to form an arc. The portion cut at the end of the ground circuit drive shaft 30 is referred to as the second cut portion 32 and the remaining portion is referred to as the second projecting portion 34. [ A grounding circuit lever 43 to be described later may be inserted into the second cutout portion 32.

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 lock any one of the main circuit drive shaft 20 and the ground circuit drive shaft 30.

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 has one end fixed to the end portion of the grounding circuit lever 43 and the other end fixed to the spring bracket 48 provided on a part of the first side plate 11, Thereby providing a force such that the hole 23 is left uncovered.

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. A first through hole 14 through which the main circuit operation hole 23 can be opened and a second through hole 15 through which the ground circuit operation hole 33 can be opened can be formed on the front plate 13 . The front plate 13 may be formed with first and second sliding holes 16 and 17 to which the connecting plate 50 or the sliding plate 60 can be slidably coupled. Here, the first and second sliding holes 16 and 17 may be formed as long holes in the transverse direction. In addition, the first sliding holes 16 may be divided into a plurality of partition walls in the middle.

The connecting plate 50 is coupled to the first sliding hole 16 and slides left and right. Legs 51 may be formed at both ends of the connection plate 50 so as to be inserted into the first sliding holes 16. Here, the leg portion 51 may be a pin coupled to the connecting plate 50. The leg portions 51 can be disposed on the right and left sides of the grounding circuit lever 43. Accordingly, when the grounding circuit lever 43 moves, it contacts the leg portion 51 and moves the connection plate 50 to the left or right.

On the other hand, the leg portion 51 may be provided with a roller. Accordingly, when the grounding circuit lever 43 is rotated, friction with the leg portion 51 is reduced, so that the connection plate 50 can smoothly move linearly.

The connection plate 50 may be provided with a support portion 55 capable of supporting the movement of the sliding plate 60. The support portion 55 may be formed of a support plate that is in contact with the connection plate 50. Here, the supporting portion 55 is formed to have a larger area than the connecting plate 50, so that the supporting plate 55 is interposed in a part of the sliding plate 60.

A locking protrusion 56 for restricting the movement of the lock lever 71, which will be described later, is protruded from the lower side of the support portion 55.

The sliding plate 60 is slidably engaged with the first sliding hole 16 and the second sliding hole 17. The sliding plate 60 may be formed in a hook shape. The sliding plate 60 is provided with coupling protrusions 61 on both sides thereof and is fitted in the first and second sliding holes 16 and 17.

The sliding plate 60 is provided with a closure part 62 on the upper side thereof to close the ground circuit operation hole 33 in a grounded state.

At the lower end of the sliding plate 60, a fitting protrusion 63 is formed.

A rotary shaft (70) is rotatably mounted on the front plate (13). The pivot shaft 70 is coupled to the fitting protrusion 63 and can linearly move the sliding plate 60 while rotating when the coupling plate 50 is released from the constraint.

A lock lever 71 is protruded from the pivot shaft 70. A slit 72 is formed in the lock lever 71, and the fitting protrusion 63 is fitted in the slit 72.

A fixing bracket 75 for fixing the pivot shaft 70 can be coupled to the front plate 13. [

The pivot shaft 70 may be provided with a key 73 constituted by a lock and capable of closing or opening the lock.

The operation of the ground position locking device of the gas insulated load switch according to the embodiment of the present invention will be described.

10, 11, and 12 are diagrams illustrating the operation of the ground position locking device of the gas insulated load switch according to the embodiment of the present invention, respectively, showing the open state, the closing state, and the locking state of the ground circuit.

Referring to Fig. 10, the interlock bar 40 is in the open position, and both the main circuit operation hole 23 and the ground circuit operation hole 33 are in a visible state. At this time, the connecting plate 50 is in a relatively right-side state, and the lock lever 71 is restrained by the locking protrusion 56 so that the key 73 can not move, and accordingly, the sliding plate 60 also does not move . That is, when the ground circuit is not in the closed state, the locking device can not be set to the locked state.

Fig. 11 shows that the grounding circuit is put in the charged state. The handle is inserted into the grounding circuit operation hole 33 and the second projection 34 is in a state of returning to the left. As a result, the interlock bar 40 rotates and the ground circuit lever 43 is placed in a state of returning a predetermined angle in the counterclockwise direction. At this time, since the connecting plate 50 is in the rolling contact state with the grounding circuit lever 43, the connecting plate 50 is moved to the left along the grounding circuit lever 43. Thus, the lock lever 71 is released from the restraint of the lock projection 56, and the key 73 is placed in a rotatable state.

12 shows a locked state. As the interlock bar 40 rotates counterclockwise, the connecting plate 50 moves to the left, and the lock lever 71 is released from the restraint of the lock projection 56. [ At this time, the key 73 is rotated to rotate the rotary shaft 70. When the lock lever 71 coupled to the rotary shaft 70 rotates clockwise, the fitting protrusion 63 inserted in the slit 72 moves to the right. Thus, the sliding plate 60 is moved to the right, and the closing portion 62 covers (closes) the grounding circuit operation hole 33. [ This prevents insertion of the handle into the grounding circuit operation hole 33, so that any operation such as opening the grounding circuit can not be performed.

According to the ground position locking device of the gas insulated load switch according to the embodiment of the present invention, the ground circuit portion can be set to the locked state at the ground position, thereby preventing any unauthorized opening operation of the unauthorized person.

In addition, when the vehicle is not in the ground state, the vehicle is not set to the locked state, thereby preventing unnecessary malfunction.

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, 12 Shroud
13 front plate 14 first through hole
15 second through holes 16, 17 first and second sliding holes
20 main circuit drive shaft 22 first incision part
23 main circuit operation hole 24 first protrusion
30 Ground circuit drive shaft 32 Second cutout
33 Ground circuit operation hole 34 Second protrusion
40 Interlock Bar 41 East
42 Main Circuit Lever 43 Ground Circuit Lever
45 Interlock shaft 48 Spring bracket
49 Return spring 50 Connecting plate
51 leg portion 55 support portion
56 Locking projection 60 Sliding plate
61 engaging projection 62 closing portion
63 Insert projection 70 times Coaxial
71 Lock lever 72 Slit
73 Key 75 Retaining bracket

Claims (11)

A main circuit drive shaft and a ground circuit drive shaft protruding from the side plate;
A main circuit operation hole penetratingly formed at an end of the main circuit drive shaft and a ground circuit operation hole penetratingly formed at an end of the ground circuit drive shaft;
And a front plate installed to be spaced apart from the side plate so as to cover the interlock bar, the ground position locking apparatus comprising:
A connecting plate slidably coupled to the front plate and moving in contact with the interlock bar;
A sliding plate slidably coupled to the front plate and configured to close or open the ground circuit operation hole in a grounded state; And
Further comprising a pivot shaft rotatably installed on the front plate and linearly moving the sliding plate when the restriction by the connection plate is released. The apparatus of claim 1, wherein the front plate is formed with first and second sliding holes through which the connecting plate or the sliding plate is slidably coupled. The apparatus of claim 1, wherein the connecting plate is formed with a leg portion which is in contact with the interlock bar and is capable of receiving contact force. 4. The apparatus according to claim 3, wherein the leg is provided with a roller. The apparatus according to claim 1, wherein the connection plate is provided with a support for supporting the movement of the sliding plate. The apparatus according to claim 1, wherein a closing portion capable of closing the grounding circuit operating hole is protrudingly formed on the sliding plate. 6. The apparatus according to claim 5, wherein a lock lever is protruded from the rotation shaft, and a slit is formed in the lock lever. [8] The apparatus of claim 7, wherein a lock protrusion for restricting movement of the lock lever is formed on the lower side of the support portion. [8] The apparatus of claim 7, wherein the sliding plate is provided with a fitting protrusion that is inserted into the slit and is provided with power. The apparatus according to claim 1, further comprising a fixing bracket for fixing the pivot shaft. 2. The apparatus of claim 1, wherein the pivot shaft is comprised of a lock and further comprises a key to close or open the lock.
KR1020150187745A 2015-12-28 2015-12-28 Locking Device of Load Break Switch KR101687722B1 (en)

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Application Number Priority Date Filing Date Title
KR1020150187745A KR101687722B1 (en) 2015-12-28 2015-12-28 Locking Device of Load Break Switch

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Application Number Priority Date Filing Date Title
KR1020150187745A KR101687722B1 (en) 2015-12-28 2015-12-28 Locking Device of Load Break Switch

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KR101687722B1 true KR101687722B1 (en) 2016-12-28

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116959901A (en) * 2023-08-15 2023-10-27 广州亿盛电气科技有限公司 Door closing operation interlocking mechanism of switch cabinet, use method and inflatable switch cabinet

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11329169A (en) * 1998-04-17 1999-11-30 Schneider Electric Ind Sa Circuit breaker and switching device using it

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11329169A (en) * 1998-04-17 1999-11-30 Schneider Electric Ind Sa Circuit breaker and switching device using it

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116959901A (en) * 2023-08-15 2023-10-27 广州亿盛电气科技有限公司 Door closing operation interlocking mechanism of switch cabinet, use method and inflatable switch cabinet

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