CN214797216U - Grounding knife switch - Google Patents

Abstract

The application discloses ground connection switch relates to electric power and overhauls technical field. The grounding disconnecting link comprises a base and a grounding end arranged on the base, and also comprises a working contact, a grounding contact, a series connection piece, an indicator light and a handle disconnecting link, wherein the series connection piece is connected with the grounding contact and the grounding end; the indicator light is connected with the grounding contact; the handle disconnecting link is rotatably connected to the base and can be respectively connected with the working contact or the grounding contact. The grounding disconnecting link can conveniently convert the operating state of the platform into the maintenance state, a grounding wire is not required to be carried during maintenance, the operation is convenient and simple, the operation of wearing an insulating glove to cut open the insulating layer is omitted, the insulating layer of the conducting wire is prevented from being damaged, and the risk of touching a charged part is avoided; the climbing risk brought by field operators is reduced without climbing a pole; the operation efficiency is improved, the grounding installation quality is obviously improved, and the practical effect of low-voltage line switching to maintenance grounding has popularization and application prospects.

Description

Grounding knife switch

Technical Field

The application relates to the technical field of electric power overhaul, particularly, relate to a ground connection switch.

Background

For the power failure and recovery operation of the rear-section line of the 0.4kV circuit breaker of the 10kV rack type transformer JP cabinet, a mode of installing a three-phase four-wire short-circuit grounding wire is generally used.

Because JP cabinet producer model is different, some earth connection can be installed in 0.4kV circuit breaker side of being qualified for the next round of competitions, but need cut open the cable or insulating wire insulating layer, wear insulating gloves to cut open the insulating layer firstly take a lot of work and time, secondly damage the insulating layer easily, and thirdly will touch electrified position risk. In addition, some JP cabinets need select suitable pole to install the earth connection and change the maintenance because do not possess in the JP cabinet and install the earth connection condition, bring the risk of ascending a height for field operation personnel. Most of distribution transformers of power supply stations in villages and towns are in the field, a set of existing grounding wires are provided with a plurality of operating rods, a set of grounding wires share 4 operating rods and grounding wires, the total amount is heavy, and the distribution transformers are inconvenient to carry on the way of the field.

SUMMERY OF THE UTILITY MODEL

The application provides a grounding disconnecting link which can be conveniently converted from a running state into a maintenance state, a grounding wire is not required to be carried during maintenance, the operation is convenient and simple, the operation of wearing an insulating glove to cut open an insulating layer is omitted, the insulating layer of a conducting wire is prevented from being damaged, and the risk of touching a charged part is avoided; the climbing risk brought by field operators is reduced without climbing a pole; the operation efficiency is improved, the grounding installation quality is obviously improved, and the practical effect of low-voltage line switching to maintenance grounding has popularization and application prospects.

Based on the above purpose, the application provides a grounding switch, which comprises a base and a grounding end arranged on the base, and further comprises a working contact, a grounding contact, a series connection piece, an indicator light and a handle switch, wherein the series connection piece is connected with the grounding contact and the grounding end; the indicator light is connected with the grounding contact; the handle disconnecting link is rotatably connected to the base and can be respectively connected with the working contact or the grounding contact.

In a first possible implementation manner of the present application, the grounding switch further includes a safety lock disposed on the base, and the safety lock is used for locking the handle switch.

In a second possible implementation manner of the present application, the grounding switch further includes an insulating housing, the insulating housing is connected to the base, and the insulating housing covers the working contact, the grounding contact, and the series connection piece.

In combination with the second possible implementation manner of the present application, in the third possible implementation manner of the present application, the insulating housing is provided with a strip-shaped through hole through which the handle switch can pass.

In a fourth possible implementation of the present application, the working contacts comprise three live input contacts and one neutral input contact; three live input contacts and a neutral input contact are arranged side by side on the upper side of the base.

With reference to the fourth possible implementation manner of the present application, in a fifth possible implementation manner of the present application, the ground contact includes three live output contacts and one neutral output contact; the three live wire output contacts and the zero line output contact are arranged on the lower side of the base side by side; the live wire output contact and the live wire input contact are arranged in a one-to-one correspondence mode, and the zero line output contact and the zero line input contact are arranged in a corresponding mode.

In combination with the fifth possible implementation manner of the present application, in a sixth possible implementation manner of the present application, the number of the indicator lights is three, and the three indicator lights are respectively connected to the three live wire output contacts.

In a seventh possible implementation manner of the present application, an electric conductor is disposed at one end of the handle switch; when the conductor is connected with the grounding contact, the maintenance work of the transformer is realized; when the conductor is connected with the working contact, the running state of the transformer is realized.

In combination with the seventh possible implementation manner of the present application, in an eighth possible implementation manner of the present application, the other end of the handle switch is provided with an insulating handle.

Compared with the prior art, after the grounding disconnecting link provided by the application is installed with the JP cabinet, the electric shock risk and the high-altitude operation risk of the power failure and recovery operation of the rear-section circuit of the JP cabinet 0.4kV circuit breaker of the 10kV rack type transformer can be reduced; the working efficiency can be improved, and the power failure time of a user can be reduced; all JP cabinet stop-and-go electricity operation can be accomplished at a work place, saves the way of reciprocating installation earth connection.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments are briefly described below, and it is obvious that the drawings described below are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic top view of a grounding switch in an alternative embodiment of the present application, after an insulating housing is hidden from view, in a state of maintenance of a transformer;

fig. 2 is a schematic top view of a grounding switch with an insulating housing removed in an alternative embodiment of the present application when the transformer is in a rotating operation state;

fig. 3 is a schematic top view of the grounding switch in an alternative embodiment of the present application in a state of maintenance of the transformer;

fig. 4 is a schematic top view of the grounding switch in an alternative embodiment of the present application when the transformer is in a rotating state;

fig. 5 is a schematic bottom view of the grounding switch in an alternative embodiment of the present invention.

Icon: 1-live input contact; 2-neutral input contact; 3-an indicator light; 4-an insulated handle; 5-an electrical conductor; 6-safety lock; 7-ground terminal; 8-live line output contact; 9-neutral output contact; 10-a base; 11-handle knife switch; 12-a strip-shaped through hole; 13-an insulating housing; 14-series slice.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it is to be understood that the terms indicating an orientation or positional relationship are based on the orientation or positional relationship shown in the drawings only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.

In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; they may be mechanically coupled, directly coupled, indirectly coupled through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In this application, unless expressly stated or limited otherwise, the first feature may be directly on or under the second feature or may include both the first and second features being in direct contact, but also the first and second features being in contact via another feature between them, not being in direct contact. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

Referring to fig. 1 to 5, fig. 1 shows a specific structure of a grounding switch provided in an alternative embodiment of the present application after an insulating housing 13 is hidden in a transformer overhaul state, fig. 2 shows a specific structure of a grounding switch provided in an alternative embodiment of the present application after an insulating housing 13 is hidden in a transformer operation state, fig. 3 shows a specific structure of a grounding switch provided in an alternative embodiment of the present application in a transformer overhaul state, and fig. 4 and 5 respectively show a specific structure of a grounding switch provided in an alternative embodiment of the present application in a transformer operation state.

The grounding disconnecting link comprises a base 10, a working contact is arranged on the upper side of the base 10, the working contact comprises three live wire input contacts 1 and a zero line input contact 2, and the three live wire input contacts 1 and the zero line input contact 2 are arranged side by side.

The downside of base 10 is provided with the ground contact, and the ground contact includes three live wire output contact 8 and a zero line output contact 9, and three live wire output contact 8 and a zero line output contact 9 set up side by side to live wire output contact 8 sets up with live wire input contact 1 one-to-one, and zero line output contact 9 sets up with zero line input contact 2 correspondence.

The right side of the base 10 is provided with a ground terminal 7, one end of the ground terminal 7 is connected with a grounding knife switch, and the other end is connected with a ground wire of a transformer (not shown in the figure) in a line. As shown in fig. 5, a serial piece 14 is provided on the other surface of the base 10. The series connection 14 connects three live output contacts 8, one neutral output contact 9 and the ground 7.

Three indicator lights 3 are further arranged on the base 10, and the three indicator lights 3 are respectively connected with the three live wire output contacts 8.

Be provided with handle switch 11 between ground contact and work contact, handle switch 11 rotates to be connected on base 10, and handle switch 11 includes electric conductor 5 and insulating handle 4, and wherein electric conductor 5 is the crossbeam of making for the conducting material metal and connects four metal montants on the crossbeam, and insulating handle 4 sets up in crossbeam one end. When the handle disconnecting link 11 is pulled down, the conductor 5 is connected with the grounding contact to realize the short circuit grounding of the grounding disconnecting link, and at the moment, the transformer is in a maintenance state; when the handle disconnecting link 11 is pulled upwards, the short circuit grounding of the grounding disconnecting link is released, and the conductor 5 is connected with the working contact, namely the transformer is in a transfer state.

The safety lock 6 is further arranged on the right side of the base 10, and after the handle disconnecting link 11 is pulled down, the safety lock 6 can lock the handle disconnecting link 11 on the base 10, so that safety accidents caused by the fact that an unknown person pulls the handle disconnecting link 11 by mistake are avoided.

The base 10 is further provided with an insulating shell 13, the insulating shell 13 covers the working contact, the grounding contact and the series connection piece 14, and the insulating shell 13 is further provided with a strip-shaped through hole 12 through which four metal vertical rods on the conductor 5 of the handle switch 11 can pass.

Before maintenance, the transformer is in a running state, when the transformer is maintained, a line disconnecting switch (not shown in the figure) is pulled down firstly, whether the indicator lamp 3 is on or not is observed, and if the indicator lamp 3 is on, the power-back is indicated; if the indicator light 3 is not on, the handle disconnecting link 11 can be pulled down, and the safety lock 6 is locked, so that the line maintenance work can be carried out. After the maintenance work is finished, the handle knife switch 11 is upwards closed, and then the isolating switch is closed, so that the normal power-on can be realized.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (9)

1. The utility model provides a grounding switch, includes the base and sets up earthing terminal on the base, its characterized in that still includes:

a working contact;

a ground contact;

a series tab connecting the ground contact and the ground terminal;

the indicator light is connected with the grounding contact; and

the handle disconnecting link is rotatably connected to the base and can be respectively connected with the working contact or the grounding contact.

2. The grounding switch of claim 1, further comprising:

a safety lock disposed on the base, the safety lock for locking the handle knife switch.

3. The grounding switch of claim 1, further comprising:

the insulating shell is connected to the base, and the insulating shell covers the working contact, the grounding contact and the series connection piece.

4. The grounding switch of claim 3, wherein:

and the insulating shell is provided with a strip-shaped through hole through which the handle disconnecting link can pass.

5. The grounding switch of claim 1, wherein:

the working contacts comprise three live wire input contacts and a zero line input contact;

the three live wire input contacts and the one zero line input contact are arranged on the upper side of the base side by side.

6. The grounding switch of claim 5, wherein:

the grounding contact comprises three live wire output contacts and a zero line output contact;

the three live wire output contacts and the one zero wire output contact are arranged on the lower side of the base side by side;

the live wire output contacts and the live wire input contacts are arranged in a one-to-one correspondence mode, and the zero line output contacts and the zero line input contacts are arranged in a corresponding mode.

7. The grounding switch of claim 6, wherein:

the number of the indicating lamps is three, and the three indicating lamps are respectively connected with the three live wire output contacts.

8. The grounding switch of claim 1, wherein:

one end of the handle knife switch is provided with a conductor;

when the conductor is connected with the grounding contact, the overhaul work of the transformer is realized;

when the conductor is connected with the working contact, the running state of the transformer is realized.

9. The grounding switch of claim 8, wherein:

and the other end of the handle disconnecting link is provided with an insulating handle.

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