CN212694937U - Transformer neutral point complete protection device - Google Patents
Transformer neutral point complete protection device Download PDFInfo
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- CN212694937U CN212694937U CN202021422551.4U CN202021422551U CN212694937U CN 212694937 U CN212694937 U CN 212694937U CN 202021422551 U CN202021422551 U CN 202021422551U CN 212694937 U CN212694937 U CN 212694937U
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- neutral point
- transformer
- terminal board
- protection device
- base
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- 230000007935 neutral effect Effects 0.000 title claims abstract description 55
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 17
- 239000010959 steel Substances 0.000 claims abstract description 17
- 230000007246 mechanism Effects 0.000 claims description 5
- 238000009434 installation Methods 0.000 abstract description 8
- 238000002955 isolation Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a transformer neutral point complete set protection device, include: the steel stand, the installation base of T shape structure, the arrester of setting at installation base tip, current transformer, neutral point isolator, the steel stand passes through fastener and links to each other with ground, the installation base level sets up on the steel stand, the arrester is equipped with first terminal board, current transformer is equipped with the upper junction plate, be equipped with the discharge gap stick between upper junction plate and the first terminal board, neutral point isolator is equipped with second terminal board, second terminal board passes through the wire and links to each other with transformer neutral point and first terminal board respectively. The utility model discloses a T shape installation base constitutes a compact whole with arrester, current transformer, neutral point isolator, can shorten transformer neutral point complete set protection device's overall length greatly, reduces its occupation space, can satisfy sufficient electrical safety distance under the limited condition in indoor space moreover.
Description
Technical Field
The utility model relates to a power equipment technical field, in particular to transformer neutral point complete set protection device.
Background
The neutral point grounding mode of the transformer of the power system is closely related to the reliability and safety of power supply of the system, the overvoltage and insulation matching of the transformer, the setting and configuration of a relay protection device, the interference of a communication network system and the like. In the past, in a medium-voltage power grid, a transformer generally adopts a mode that a neutral point is not grounded, and due to the fact that the capacity of the power grid is not large, even if a single-phase short-circuit fault occurs, normal operation of a system cannot be influenced. With the gradual increase of the length of a power transmission line of a power grid, the improvement of the voltage grade, the complication of the wiring of the power grid and the continuous expansion of the capacity of the power grid, the transformer gradually adopts a mode of directly grounding a neutral point. However, when a system fails, a large short-circuit current is generated due to the grounding mode, which causes very serious damage to the power equipment, and in addition, a phenomenon that the power system is not grounded locally may occur due to misoperation of a relay protection device of the system caused by a wiring error or other reasons.
In order to improve the safety, stability and reliability of the power system, it is currently practiced to provide a complete set of protection devices at the neutral point of the transformer. However, the existing transformer neutral point complete protection device is arranged in a row, the occupied area is large, and the existing transformer neutral point complete protection device cannot completely meet the indoor use requirement due to limited space of an indoor transformer.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a compact structure's transformer neutral point complete set protection device.
According to the utility model discloses transformer neutral point complete set protection device, include: the lightning arrester is provided with a first terminal board, the current transformer is provided with an upper connecting board, a discharge gap bar is arranged between the upper connecting board and the first terminal board, the neutral point isolating switch is provided with a second terminal board, and the second terminal board is respectively connected with a transformer neutral point and the first terminal board through a lead.
According to the utility model discloses above-mentioned embodiment's transformer neutral point complete set protection device has following beneficial effect at least: the lightning arrester, the current transformer and the neutral point isolating switch form a compact whole through the T-shaped mounting base, the overall length of the transformer neutral point complete protection device can be greatly shortened, the occupied space of the transformer neutral point complete protection device is reduced, and the enough electrical safety distance can be met under the condition that the indoor space is limited.
According to the utility model discloses a some embodiments, the installation base includes the first base and the second base of cuboid form, the arrester with current transformer sets up respectively the both ends of first base, neutral point isolator sets up just keep away from on the second base first base.
According to some embodiments of the utility model, first base with be equipped with the supporting seat between the arrester.
According to some embodiments of the invention, the discharge gap of the discharge gap rod is set to 90mm to 150 mm.
According to some embodiments of the invention, one side of the neutral point disconnector is provided with a knife switch.
According to some embodiments of the utility model, be provided with on the steel stand with the operating device that neutral point isolator connects.
According to some embodiments of the utility model, be provided with on the steel stand with the counter that discharges that the arrester links to each other.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a top view of an embodiment of the present invention;
fig. 2 is a left side view of an embodiment of the present invention;
fig. 3 is a front view of the embodiment of the present invention.
Reference numerals:
a steel upright 100, an operating mechanism 101, and a discharge counter 102;
a mounting base 200, a first base 201, a second base 202;
a lightning arrester 300, a first terminal board 301, a support base 302;
a current transformer 400 and an upper connecting plate 401;
a discharge gap bar 500;
neutral point isolation switch 600, second terminal board 601, blade 602.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does 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 invention.
In the description of the present invention, unless explicitly defined otherwise, the terms such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the terms in the present invention by combining the specific contents of the technical solutions.
Referring to fig. 1 to 3, for the utility model discloses transformer neutral point complete set protection device includes: the steel upright 100, the mounting base 200 of the T-shaped structure, the lightning arrester 300 arranged at three ends of the mounting base 200, the current transformer 400 and the neutral point isolating switch 600 are respectively arranged.
The steel column 100 is connected to the ground by fastening means, preferably anchor bolts, although other fastening means may be used to meet the construction requirements. The installation base 200 is horizontally installed on the steel upright post 100, the installation base 200 is provided with a grounding wire, the top of the lightning arrester 300 is provided with a first terminal board 301, the top of the current transformer 400 is provided with an upper connecting board 401, the current transformer 400 is also connected with the installation base 200 through a long grounding aluminum row, the model of the current transformer is LZBW-10, a discharge gap bar 500 is arranged between the upper connecting board 401 and the first terminal board 301, the neutral point isolating switch 600 is provided with a second terminal board 601, and the second terminal board 601 is respectively connected with a transformer neutral point and the first terminal board 301 through leads. When the voltage of the neutral point isolating switch 600 rises, the discharge gap rod 500 is broken down to cause an arc, and the neutral point isolating switch 600 is grounded; when the voltage of the neutral point disconnector 600 is reduced, the arc is extinguished and the neutral point disconnector 600 is not grounded again.
In some embodiments of the present invention, the mounting base 200 includes a first base 201 and a second base 202 having a rectangular parallelepiped shape, the first base 201 and the second base 202 are fixed on the steel column 100 by bolts and form the mounting base 200 having a T-shaped structure, the lightning arrester 300 and the current transformer 400 are respectively mounted at two ends of the first base 201, and the neutral point isolating switch 600 is mounted on the second base 202 and is located at one end of the second base 202 away from the first base 201.
The longitudinal length of the existing transformer neutral point protection kit arranged in a row can reach 3000mm, while the longitudinal length of the transformer neutral point protection kit in the embodiment is only 1800mm, so that the overall length of the transformer neutral point protection kit can be greatly shortened.
In some embodiments of the present invention, a supporting seat 302 is disposed between the first base 201 and the lightning arrester 300 for effectively fixing the lightning arrester 300 and making the lightning arrester 300 be arranged in a vertical direction.
In some embodiments of the present invention, the discharge gap of the discharge gap rod 500 is adjustable, and the adjustment range is 90mm to 150 mm. The adjusting range of the discharge gap is consistent with that of the existing transformer neutral point complete set protection device which is arranged in a row, and under the condition that the discharge gap is not changed, the transverse length of the embodiment is only 1109 mm.
In some embodiments of the present invention, a knife switch 602 is disposed on one side of the neutral point isolation switch 600, and the knife switch 602 is connected to the mounting base 200 through a tin-plated copper wire.
In some embodiments of the present invention, the steel column 100 is provided with an operating mechanism 101 connected to the neutral point isolation switch 600, the operating mechanism 101 is used to control the neutral point isolation switch 600 to perform the opening/closing operation, in this embodiment, an electric operating mechanism is adopted, and the model is GJ 12D.
In some embodiments of the present invention, the steel column 100 is provided with a discharge counter 102 connected to the lightning arrester 300 for monitoring the number of discharges and the leakage current of the lightning arrester 300.
In the description herein, references to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (7)
1. A transformer neutral point complete protection device is characterized by comprising:
the steel upright post (100), the steel upright post (100) is connected with the ground through a fastening device;
the mounting base (200) of the T-shaped structure is horizontally arranged on the steel upright post (100);
and arranged at the end of the mounting base (200)
A lightning arrester (300) provided with a first terminal board (301);
a current transformer (400) provided with an upper connection plate (401), a discharge gap bar (500) being provided between the upper connection plate (401) and the first terminal board (301);
the neutral point isolating switch (600) is provided with a second terminal board (601), and the second terminal board (601) is respectively connected with a transformer neutral point and the first terminal board (301) through leads.
2. The transformer neutral point complete protection device according to claim 1, characterized in that the mounting base (200) comprises a first base (201) and a second base (202) which are rectangular parallelepiped-shaped, the lightning arrester (300) and the current transformer (400) are respectively arranged at two ends of the first base (201), and the neutral point isolating switch (600) is arranged on the second base (202) and is far away from the first base (201).
3. The transformer neutral point complete protection device according to claim 2, characterized in that a support base (302) is arranged between the first base (201) and the lightning arrester (300).
4. The transformer neutral point complete protection device according to any one of claims 1 to 3, wherein a discharge gap of the discharge gap rod (500) is set to 90mm to 150 mm.
5. The transformer neutral point complete protection device according to claim 1, characterized in that a knife switch (602) is arranged on one side of the neutral point isolating switch (600).
6. The transformer neutral point complete protection device according to claim 1, characterized in that an operating mechanism (101) connected with the neutral point isolating switch (600) is arranged on the steel upright post (100).
7. The transformer neutral point complete protection device according to claim 1, characterized in that a discharge counter (102) connected with the lightning arrester (300) is arranged on the steel upright post (100).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021422551.4U CN212694937U (en) | 2020-07-17 | 2020-07-17 | Transformer neutral point complete protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021422551.4U CN212694937U (en) | 2020-07-17 | 2020-07-17 | Transformer neutral point complete protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212694937U true CN212694937U (en) | 2021-03-12 |
Family
ID=74898012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021422551.4U Active CN212694937U (en) | 2020-07-17 | 2020-07-17 | Transformer neutral point complete protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212694937U (en) |
-
2020
- 2020-07-17 CN CN202021422551.4U patent/CN212694937U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No. 393, Section 3, Jinxing North Road, Wangcheng Economic and Technological Development Zone, Changsha, Hunan 410219 Patentee after: Chang Hi-Tech New Technology Co.,Ltd. Country or region after: China Patentee after: HUNAN CHANGGAO HIGH VOLTAGE SWITCHGEAR Co.,Ltd. Address before: 411400, No. 393, section 3, North Jinxing Road, Wangcheng economic and Technological Development Zone, Changsha City, Hunan Province Patentee before: HUNAN CHANGGAO HIGH VOLTAGE SWITCHGEAR GROUP Co.,Ltd. Country or region before: China Patentee before: HUNAN CHANGGAO HIGH VOLTAGE SWITCHGEAR Co.,Ltd. |
|
| CP03 | Change of name, title or address |