CN214624719U - Transformer with bushing type neutral point protection device - Google Patents
Transformer with bushing type neutral point protection device Download PDFInfo
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- CN214624719U CN214624719U CN202121323107.1U CN202121323107U CN214624719U CN 214624719 U CN214624719 U CN 214624719U CN 202121323107 U CN202121323107 U CN 202121323107U CN 214624719 U CN214624719 U CN 214624719U
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- unit
- transformer
- neutral point
- lightning arrester
- conductive
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Abstract
The technical scheme of the utility model is realized like this: a transformer having a bushing-type neutral point protection device, characterized by: including transformer main part and neutral point protection device, neutral point protection device includes: the conductive unit is connected with the output end of the main loop of the transformer main body and used for conducting and outputting the voltage of the transformer; the gap protection unit is connected with the conductive unit; a grounding unit connected with the gap protection unit; the lightning arrester is connected with the grounding unit; the input end of the three-station isolating switch is connected with the conductive unit, and the output end of the three-station isolating switch is respectively connected with the lightning arrester and the grounding unit, so that the switching work of the lightning arrester and the grounding unit is realized; a sleeve is arranged outside the conductive unit; the utility model has the advantages that: the safety is good, compact structure, and the installation is convenient.
Description
Technical Field
The utility model belongs to the technical field of the transformer technique and specifically relates to a transformer with bushing type neutral point protection device.
Background
A Transformer (Transformer) is a device that changes an alternating-current voltage by using the principle of electromagnetic induction, and main components are a primary coil, a secondary coil, and an iron core (magnetic core); the main functions are as follows: voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization (magnetic saturation transformer), and the like; when the transformer is used, a neutral point protection device is usually installed for prolonging the service life; the transformer neutral point protection device is specially used for a power transformer neutral point to realize two different operation modes of grounding operation or non-grounding operation of the transformer neutral point; therefore, the damage to the transformer caused by the rise of the voltage of the neutral point of the transformer due to system faults is avoided; the existing neutral point protection device correspondingly installed on the transformer is large in size, is installed after being transported in a split mode, is inconvenient to install and transport, is poor in safety performance due to the fact that air is adopted as an insulating medium, connection among parts is unstable, the purpose of miniaturization cannot be achieved, and meanwhile connection among electronic elements is complex, large in size and inconvenient to install.
SUMMERY OF THE UTILITY MODEL
The transformer comprises a transformer body, a transformer core and a transformer core.
The technical scheme of the utility model is realized like this: a transformer having a bushing-type neutral point protection device, characterized by: including transformer main part and neutral point protection device, neutral point protection device includes:
the conductive unit is connected with the output end of the main loop of the transformer main body and used for conducting and outputting the voltage of the transformer;
the gap protection unit is connected with the conductive unit;
a grounding unit connected with the gap protection unit;
the lightning arrester is connected with the grounding unit;
the input end of the three-station isolating switch is connected with the conductive unit, and the output end of the three-station isolating switch is respectively connected with the lightning arrester and the grounding unit, so that the switching work of the lightning arrester and the grounding unit is realized;
and a sleeve is arranged outside the conductive unit.
Preferably: the conductive unit comprises a first conductive rod arranged on the transformer main body and a second conductive rod arranged on the three-station isolating switch, the first conductive rod and the second conductive rod are connected through a wire, and the sleeve is sleeved on the first conductive rod and the second conductive rod.
Preferably: the lightning arrester also comprises a supporting unit for supporting the lightning arrester, wherein the supporting unit comprises a supporting seat, and the supporting seat is fixed on the transformer main body.
Preferably: the lightning arrester also comprises a supporting unit used for supporting the lightning arrester, the supporting unit comprises a supporting column, and the grounding unit is arranged on the supporting column.
Preferably: the three-station isolation switch and gap protection device is characterized by further comprising a tank body used for containing the three-station isolation switch and the gap protection unit, a sealing cavity is formed in the tank body, and SF6 insulating gas is filled in the sealing cavity and/or the sleeve.
Preferably: and a current transformer is arranged on the gap protection unit.
Preferably: the gap protection unit comprises a moving contact, a fixed contact connected with the three-station isolating switch and an adjusting mechanism used for controlling the moving contact to move.
The utility model has the advantages that:
drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic view of the installation of a neutral point protection device;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is a schematic structural diagram of a three-position isolating switch;
FIG. 4 is a system diagram;
FIG. 5 is a schematic structural view of example 2;
FIG. 6 is a side cross-sectional view of FIG. 5;
FIG. 7 is a schematic view of the adjustment mechanism;
the examples in the figure are: the transformer comprises a transformer body 1, a conductive unit 2, a first conductive rod 21, a second conductive rod 22, a lead 23, a sleeve 3, a tank 4, a sealed cavity 41, a gap protection unit 5, a movable contact 51, a fixed contact 52, an adjusting mechanism 53, a movable rod 531, a current transformer 532, an adjusting screw sleeve 533, a limiting block 534, a locking screw 535, an arrester 6, an arrester detector 7, a three-station isolating switch 8, a driving mechanism 9, an adsorbent 10, a supporting seat 11, a supporting column 12 and a control cabinet 13.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example 1
As shown in fig. 1-4, the utility model discloses a transformer with bushing type neutral point protection device the utility model discloses an among the specific embodiment, including transformer main part 1 and central point protection device, neutral point protection device includes: the conductive unit 2 is connected with the output end of the main loop of the transformer main body 1 and used for conducting and outputting transformer voltage; a gap protection unit 5 connected to the conductive unit; a grounding unit connected with the gap protection unit; the lightning arrester 6 is connected with the grounding unit; the input end of the three-station isolating switch 8 is connected with the conductive unit, and the output end of the three-station isolating switch is respectively connected with the lightning arrester and the grounding unit; a sleeve 3 is arranged outside the conductive unit 2, the sleeve 3 is a porcelain sleeve, a lightning arrester detector 7 is arranged on the lightning arrester 6, and the grounding unit is a grounding wire; the arrangement of the sleeve greatly improves the safety of conductive conduction.
In this embodiment, still including the jar body 4 that is used for holding three station isolator and clearance protection unit, form sealed chamber 41 in the jar body 4, sealed chamber 41 and the intraductal SF6 insulating gas that all fills of cover, the jar body is the six-way jar body, jar body one side is installed and is used for controlling the actuating mechanism 9 of three station isolator 8 work, specifically says that, the transmission setting of accessible motor and reducing gear box drives three station switches and rotates, and turned angle is clockwise forty-five degrees and anticlockwise forty-five degrees, controls three station switches and rotates in ninety degree interval, can set up the locating part in actuating mechanism and die the card of both sides, makes actuating mechanism's output interval in ninety degrees, controls three station isolator and rotates the phenomenon of passing when avoiding control to rotate.
In this embodiment, the tank body is further provided with an adsorbent 10 for adsorbing moisture in the tank body.
In this embodiment, the conductive unit 2 includes a first conductive rod 21 vertically installed on the upper end of the transformer main body and a second conductive rod 22 installed on the upper end of the tank body, the first conductive rod is connected with the main loop output end of the transformer main body, the second conductive rod is connected with the input end of the three-station isolating switch, the first conductive rod and the second conductive rod are connected through a wire 23, and the sleeve is sleeved on the first conductive rod and the second conductive rod.
In this embodiment, still include the support element that is used for supporting the arrester, the support element includes supporting seat 11, supporting seat 11 is fixed on the transformer body lateral wall, the jar body is installed in the arrester upper end, the earth connection is followed the transformer and is introduced underground main grounding net.
When the lightning arrester works, the driving mechanism controls the three-station isolating switch to rotate until the output end of the three-station isolating switch is connected with the lightning arrester, so that the working state is ensured, when a lightning strike or a fault occurs, the transformer generates high voltage and transmits the high voltage to the first conducting rod, the high voltage is transmitted to the second conducting rod through the conducting wire, and the second conducting rod transmits the voltage to the gap protection unit and the lightning arrester for protection; when the three-station isolating switch is overhauled, the three-station isolating switch is controlled by the driving mechanism to rotate to the output end of the three-station isolating switch to be directly connected with the grounding unit, voltage is directly introduced into the ground to be overhauled and tested, and therefore the insulating property is tested, and the use safety is guaranteed.
Through the technical scheme, the electronic elements are arranged in the sealed cavity through the arrangement of the tank body, SF6 gas is filled in the sealed cavity to isolate the contact of the external air, so that the corrosion and the aging of the electronic elements are prevented, the service life is prolonged, the influence of the external environment on a discharge gap is avoided, the SF6 gas is used as an insulating medium, the arc extinguishing performance is good, and the safety performance is further improved; the electronic elements are connected, arranged and matched and arranged in the tank body, so that the structure can be ensured to be compact, the control is accurate, the size of the device can be greatly reduced, the electronic elements are installed in the tank body when leaving a factory, the conveying is convenient and fast, and the field installation is convenient; meanwhile, the installation mode of the device can be selected according to the actual field, the device and the transformer can be integrally installed, and the installation space is saved.
Example 2
As shown in fig. 5 and fig. 6, the difference between this embodiment and the above embodiment is that in this embodiment, the supporting unit includes a supporting column 12, the grounding unit is disposed on the supporting column 12, the grounding wire is led into the underground main grounding grid from the supporting column, a control cabinet 13 is further disposed on the supporting column, the control cabinet is used for controlling the driving mechanism so as to control the three-position disconnecting switch, and the three-position disconnecting switch is convenient to use during maintenance, and at this time, the supporting column and the transformer main body are respectively installed and fixed, and are connected only by a conducting wire; the support that adopts the support column mainly is different with the integrative installation that adopts the supporting seat, need set up the mounted position in addition and supply the support column to install, but can directly draw ground connection on through the support column.
As shown in fig. 7, in this embodiment, the gap protection unit 5 includes a moving contact 51, a fixed contact 52 connected to the three-position disconnecting switch, and an adjusting mechanism 53 for controlling the moving contact to move, the adjusting mechanism includes a movable rod 531 connected to the moving contact, a current transformer 532 is disposed on the movable rod 531 in the tank, one end of the movable rod penetrates out of the tank, an adjusting screw sleeve 533 is sleeved on the movable rod, a limit block 534 is disposed on a side wall of the tank, a bottom of the limit block can be inserted between the adjusting screw sleeve and the tank, the limit block 534 is slidably connected to the tank up and down, a limit groove is disposed on the limit block, the limit groove is vertically arranged in a long strip shape, a locking screw 535 is disposed on the limit block, and the locking screw penetrates through the limit groove and is in threaded connection with the tank.
When the current transformer is used in daily life (namely in a factory state), a gap is reserved between the static contact and the moving contact, at the moment, the discharge gap is five millimeters, at the moment, the bottom of the limiting block is inserted between the adjusting screw sleeve and the tank body, the thickness of the inserted part of the limiting block is five millimeters, because the static contact is required to be contacted with the moving contact when in maintenance, the limiting block does not bear the screwing force of the adjusting screw sleeve any more, the limiting block slides upwards until the limiting block is separated from the adjusting screw sleeve, then the locking screw is screwed again, at the moment, no barrier exists between the adjusting screw sleeve and the tank body, the adjusting screw sleeve rotates inwards to drive the movable rod to move inwards until the static contact is contacted with the moving contact, and at the moment, the movable rod is used for testing the current transformer; similarly, when a system insulation test is carried out, after the locking screw is loosened, the limiting block is moved downwards, the thicker part of the limiting block is inserted between the adjusting screw sleeve and the tank body (the thickness of the limiting block is more than thirty-five millimeters), the discharge gap is kept to be more than thirty-five millimeters, and the limiting block is used for the system insulation test; the adjusting of the distance of the discharge gap is convenient, the purpose of overhauling and using can be achieved by directly moving away the limiting block to enable the movable contact to be in contact with the fixed contact, the use is convenient, and the installation performance is high.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A transformer having a bushing-type neutral point protection device, characterized by: including transformer main part and neutral point protection device, neutral point protection device includes:
the conductive unit is connected with the output end of the main loop of the transformer main body and used for conducting and outputting the voltage of the transformer;
the gap protection unit is connected with the conductive unit;
a grounding unit connected with the gap protection unit;
the lightning arrester is connected with the grounding unit;
the input end of the three-station isolating switch is connected with the conductive unit, and the output end of the three-station isolating switch is respectively connected with the lightning arrester and the grounding unit, so that the switching work of the lightning arrester and the grounding unit is realized;
and a sleeve is arranged outside the conductive unit.
2. A transformer with bushing-type neutral point protection according to claim 1, wherein: the conductive unit comprises a first conductive rod arranged on the transformer main body and a second conductive rod arranged on the three-station isolating switch, the first conductive rod and the second conductive rod are connected through a wire, and the sleeve is sleeved on the first conductive rod and the second conductive rod.
3. A transformer with bushing-type neutral point protection according to claim 1, wherein: the lightning arrester also comprises a supporting unit for supporting the lightning arrester, wherein the supporting unit comprises a supporting seat, and the supporting seat is fixed on the transformer main body.
4. A transformer with bushing-type neutral point protection according to claim 1, wherein: the lightning arrester also comprises a supporting unit used for supporting the lightning arrester, the supporting unit comprises a supporting column, and the grounding unit is arranged on the supporting column.
5. A transformer with bushing-type neutral point protection according to claim 1, wherein: the three-station isolation switch and gap protection device is characterized by further comprising a tank body used for containing the three-station isolation switch and the gap protection unit, a sealing cavity is formed in the tank body, and SF6 insulating gas is filled in the sealing cavity and/or the sleeve.
6. A transformer with bushing-type neutral point protection according to claim 1, wherein: and a current transformer is arranged on the gap protection unit.
7. A transformer with bushing-type neutral point protection according to claim 1, wherein: the gap protection unit comprises a moving contact, a fixed contact connected with the three-station isolating switch and an adjusting mechanism used for controlling the moving contact to move.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121323107.1U CN214624719U (en) | 2021-06-15 | 2021-06-15 | Transformer with bushing type neutral point protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121323107.1U CN214624719U (en) | 2021-06-15 | 2021-06-15 | Transformer with bushing type neutral point protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214624719U true CN214624719U (en) | 2021-11-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121323107.1U Expired - Fee Related CN214624719U (en) | 2021-06-15 | 2021-06-15 | Transformer with bushing type neutral point protection device |
Country Status (1)
| Country | Link |
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| CN (1) | CN214624719U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113539615A (en) * | 2021-07-19 | 2021-10-22 | 浙江日新电气有限公司 | Transformer with neutral point protection device and adsorbent filling method thereof |
-
2021
- 2021-06-15 CN CN202121323107.1U patent/CN214624719U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113539615A (en) * | 2021-07-19 | 2021-10-22 | 浙江日新电气有限公司 | Transformer with neutral point protection device and adsorbent filling method thereof |
| CN113539615B (en) * | 2021-07-19 | 2022-02-11 | 浙江日新电气有限公司 | Transformer with neutral point protection device and adsorbent filling method thereof |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211105 |