CN216720541U - Combined grounding device - Google Patents

Abstract

The utility model provides a combined grounding device, which comprises a cabinet body, wherein the cabinet body is internally divided into a grounding switch chamber and a grounding resistor chamber which are mutually independent; the grounding switch chamber and the grounding resistance chamber are connected through the interpenetrated bus copper bar; one end of the bus copper bar is used for being connected with a wire outlet end of the grounding switch indoor grounding switch, and the other end of the bus copper bar is used for being connected with a wire inlet end of a current transformer in the grounding resistor chamber. The inlet end of the grounding switch is connected with the neutral point of the generator set, the outlet end of the grounding switch is connected with one end of a busbar after being gathered, and the busbar is connected to the ground through a current transformer and a resistor bar. The grounding switch and the grounding resistor are directly connected together in the cabinet, so that the layout is more reasonable, waste is avoided, the defect that a high-voltage wire is used for connection in an installation site is overcome, the workload is reduced, and the cost is saved.

Description

Combined grounding device

Technical Field

The utility model relates to the technical field of grounding resistors, which is mainly used in the fields of data centers, comprehensive hospitals, power stations and power plants, in particular to a combined grounding device.

Background

The ground resistance is a resistance encountered by a current flowing from a ground device into the ground and then flowing through the ground to another ground body or spreading to a distant place. The value of the grounding resistance represents the degree of good contact of the electrical device with "ground" and reflects the size of the grounding grid.

The grounding resistance meter mainly comprises a hand-operated generator, a current transformer, a potentiometer and a galvanometer.

In the field of medium-high voltage grounding devices, such as data centers, comprehensive hospitals and other places, the electric load is large, a standby power supply usually needs a plurality of medium-high voltage generator sets to operate in parallel, however, when the medium-high voltage generator sets operate in parallel, only one generator set is required to be grounded through a grounding switch in order to prevent circulation current. Some only do ground switch cabinet in the existing market, some only do ground resistance cabinet, and the cabinet type difference of different producers production is bigger, and ground switch cabinet and ground resistance cabinet are coordinated inconsistent behind the cabinet (installation ground resistance in the ground switch cabinet or installation ground switch in the ground resistance cabinet), even because of different producers design link up easy problem in earlier stage, cause the design mistake, lead to increasing the waste. The other manufacturers separate the two into an independent cabinet, and the junction point in the grounding switch cabinet is connected into the grounding resistor cabinet through a high-voltage wire, so that the workload of field workers is increased, a high-voltage cable head needs to be manufactured, the labor cost is increased, and the danger is increased when the high-voltage wire is exposed outside.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems in the background art, the utility model discloses a combined grounding device.

The utility model provides a combined grounding device, which comprises a cabinet body, wherein the interior of the cabinet body is divided into a grounding switch chamber and a grounding resistor chamber which are mutually independent;

the grounding switch chamber and the grounding resistance chamber are connected through the interpenetrated bus copper bar;

one end of the bus copper bar is used for being connected with a wire outlet end of the earthing switch in the earthing switch chamber, and the other end of the bus copper bar is used for being connected with a wire inlet end of a current transformer in the earthing resistor chamber.

The inlet end of the grounding switch is connected with the neutral point of the generator set, the outlet end of the grounding switch is connected with one end of a busbar after being gathered, and the busbar is connected to the ground through a current transformer and a resistor bar. The grounding switch and the grounding resistor are directly connected together in the cabinet, so that the layout is more reasonable, waste is avoided, the defect that a high-voltage wire is used for connection in an installation site is overcome, the workload is reduced, and the cost is saved.

Because the copper bar that converges offsets or long-time the use because of the mounted position easily, touches cabinet body baffle, leads to electrocuteeing, so further improve and solve this problem, it is specific, the copper bar that converges has cup jointed the sleeve pipe. The sleeve is insulated, and the bus copper bar is isolated from the cabinet body partition plate.

Further, the sleeve is a corrugated tube. The corrugated pipe not only can stretch out and draw back, but also can increase the distance between the copper bar that converges and the cabinet body baffle. So arranged, the utility model is used for improving the safety of the utility model.

Further, the grounding switch is a vacuum contactor or an electric isolating switch. So set up, earthing switch has the remote control function, can close or break according to remote signal is automatic.

When the grounding resistance chamber works, a large amount of heat can be dissipated, and the stable operation of the grounding resistance chamber can be maintained only by dissipating heat, so that a cabinet body needs to be provided with a heat dissipation structure, and particularly, grid plates are arranged on a top plate and a bottom plate of the grounding resistance chamber; a plurality of louver holes are formed in the side plates of the cabinet body. Mesh panels are also used to protect against insects.

Furthermore, the grounding switch chamber and the grounding resistance chamber are respectively provided with a glass window and a human body induction switch, the interior of the grounding switch chamber and the grounding resistance chamber is respectively provided with an illuminating lamp which is opposite to the glass window, and the illuminating lamps are controlled to be opened or closed through the cabinet doors and also controlled to be opened or closed through the human body induction switches. When the utility model needs to be maintained, the cabinet door is opened, and the illuminating lamp automatically lights up along with the opening of the cabinet door; need not to open the cabinet door when staff's normal work is patrolled and examined, lean on human inductive switch to make the light to observe inside device situation, safe and reliable.

Furthermore, a control component is also arranged in the grounding switch chamber and is fixedly installed through an element fixing plate; the element fixing plate and the main incoming line are distributed at the upper end and the lower end of the grounding switch chamber. So set up, increased the distance of control components and parts and main inlet wire, the on-the-spot wiring of not only being convenient for has improved insulating nature moreover, and is safer.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic structural view of the present invention, wherein the cabinet door, the partition board and the two side plates are hidden;

FIG. 2 is an enlarged view at A in FIG. 1;

FIG. 3 is a front view of the present invention with the cabinet door, partition and side panels hidden;

FIG. 4 is a front view of the present invention;

FIG. 5 is a left side view of the present invention;

FIG. 6 is a rear view of the present invention;

FIG. 7 is a wiring diagram of the present invention;

in the figure: 1. a cabinet body; 2. a grounding switch chamber; 3. a ground resistance chamber; 4. a grounding switch; 5. a sleeve; 6. a glass window; 7. a human body induction switch; 8. controlling the components; 9. an element fixing plate; 10. a busbar; 11. a louver hole; 12. a current transformer; 13. local-remote selection switch; 14. a local opening-closing button; 15. a closing-opening indicator light; 31. and (4) a grid plate.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

The first embodiment is as follows:

as shown in fig. 1 and 3, the present invention is a combined grounding device, which comprises a cabinet 1, wherein the cabinet 1 is divided into a grounding switch chamber 2 and a grounding resistor chamber 3 which are independent of each other by a partition.

A plurality of earthing switches 4 are arranged in the earthing switch chamber 2, the earthing switches 4 are distributed in a multilayer mode in the vertical direction, and each layer is arranged in parallel.

The grounding resistance chamber 3 is provided with a current transformer 12 and a plurality of vertically distributed resistance rows.

The partition boards of the grounding switch chamber 2 and the grounding resistor chamber 3 are provided with insertion holes, and the bus copper bars 10 are inserted into the insertion holes. The line outlet end of the grounding switch 4 is connected with a connecting copper bar which is gathered at one end of a confluence copper bar 10; the other end of the busbar line 10 is connected with the incoming line end of the current transformer 12.

The lower end of the grounding switch chamber 2 is provided with a control component 8 which is fixedly arranged through a component fixing plate 9; the main inlet wire is arranged at the upper end of the grounding switch chamber 2. So set up, increased the distance of control components and parts 8 with main inlet wire, the on-the-spot wiring of not only being convenient for has improved insulating nature moreover, and is safer.

A fault current relay is installed on the secondary side of the current transformer 12 and is used for detecting whether fault current passes through the current transformer 12.

As shown in fig. 1, 5 and 6, the grounding resistance chamber 3 is provided with grid plates 31 on the top plate and the bottom plate; a plurality of blind holes 11 are arranged on the side plate of the cabinet body 1. The grid plate 31 and the louver holes 11 are used for heat dissipation of the utility model, so that the stable operation of the utility model is ensured; the mesh plate 31 is also used for protection against insects.

A local-remote selection switch 13, a local opening-closing button 14 and a closing-opening indicator lamp 15 are mounted on a cabinet door of the grounding switch chamber 2 and used for displaying the state of the grounding switch 4.

As shown in fig. 7, the inlet end of the earthing switch 4 is connected to the neutral point of the generator set, the outlet end is connected to one end of the busbar 10 after being gathered, and the busbar 10 is connected to the ground through the current transformer 12 and the resistor bank. The grounding switch 4 and the grounding resistor are directly connected together in the cabinet, so that the layout is more reasonable, waste is avoided, the defect that a high-voltage wire is used for connection in an installation site is overcome, the workload is reduced, and the cost is saved.

The second embodiment:

compared with the first embodiment, the differences are as follows: the bus bar 10 is sleeved with a sleeve 5. The sleeve 5 is insulating, will converge copper bar 10 and 1 baffle of the cabinet body keep apart for avoid converging copper bar 10 and because of the mounted position skew or long-time the use, touch 1 baffle of the cabinet body, lead to the electric shock.

Example three:

compared with the two examples, the difference is that: as shown in fig. 2, the sleeve 5 is a bellows. The corrugated pipe not only can stretch out and draw back, but also can increase the distance between the busbar 10 and the partition board of the cabinet body 1. So arranged, it is used to improve the security of the utility model.

Example four:

compared with the first embodiment, the differences are as follows: the grounding switch 4 is a vacuum contactor or an electric isolating switch. So set up, earthing switch 4 has the remote control function, can close or break according to remote signal is automatic.

Example five:

compared with the first embodiment, the differences are as follows: all be equipped with glass window 6 and human inductive switch 7 on the cabinet door of ground switch room 2 and ground resistance room 3, inside all is equipped with the light just to glass window 6, and the light is opened or is closed through cabinet door control, still opens or closes through human inductive switch 7 control. When the utility model needs to be maintained, the cabinet door is opened, and the illuminating lamp automatically lights up along with the opening of the cabinet door; need not to open the cabinet door when staff normally work patrols and examines, lean on human inductive switch 7 to make the light bright to observe inside device situation, safe and reliable.

Example six:

compared with the first embodiment, the differences are as follows: the control component 8 is located at the upper end of the grounding switch chamber 2, and the main incoming line is located at the lower end.

In light of the foregoing description of the preferred embodiments of the present invention, it is intended that the present invention cover modifications and variations of this invention provided they fall within the scope of the following claims. The technical scope of the present invention is not limited to the content of the description, and must be determined according to the scope of the claims.

Claims (7)

1. A combined grounding device is characterized in that: the grounding switch cabinet comprises a cabinet body (1), wherein the cabinet body (1) is internally divided into a grounding switch chamber (2) and a grounding resistance chamber (3) which are mutually independent;

the grounding switch chamber (2) is connected with the grounding resistance chamber (3) through the interpenetrated bus copper bar (10);

one end of the busbar (10) is used for being connected with a wire outlet end of the grounding switch (4) in the grounding switch chamber (2), and the other end of the busbar is used for being connected with a wire inlet end of a current transformer (12) in the grounding resistor chamber (3).

2. The modular grounding device of claim 1, wherein: the confluence copper bar (10) is sleeved with a sleeve (5).

3. The modular grounding device of claim 2, wherein: the sleeve (5) is a corrugated pipe.

4. The modular grounding device of claim 1, wherein: the grounding switch (4) is a vacuum contactor or an electric isolating switch.

5. The modular grounding device of claim 1, wherein: grid plates (31) are arranged on the top plate and the bottom plate of the grounding resistance chamber (3); a plurality of blind holes (11) are formed in the side plate of the cabinet body (1).

6. The modular grounding device of claim 1, wherein: all be equipped with glass window (6) and human inductive switch (7) on ground switch room (2) and ground resistance room (3) cabinet door, inside all is equipped with just to the light of glass window (6), the light passes through cabinet door control is opened or is closed, still passes through human inductive switch (7) control is opened or is closed.

7. The modular grounding device of claim 1, wherein: a control component (8) is also arranged in the grounding switch chamber (2) and is fixedly installed through a component fixing plate (9); the element fixing plate (9) and the main incoming line are distributed at the upper end and the lower end of the grounding switch chamber (2).

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