CN203553900U - Neutral point complete set protection device for transformer - Google Patents
Neutral point complete set protection device for transformer Download PDFInfo
- Publication number
- CN203553900U CN203553900U CN201320674889.2U CN201320674889U CN203553900U CN 203553900 U CN203553900 U CN 203553900U CN 201320674889 U CN201320674889 U CN 201320674889U CN 203553900 U CN203553900 U CN 203553900U
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- China
- Prior art keywords
- transformer
- neutral point
- isolating switch
- lightning arrester
- complete set
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Abstract
The utility model discloses a neutral point complete set protection device for a transformer, which comprises a neutral point complete set protection device body and a support (5); the neutral point complete set protection device body comprises an isolation switch (1), a lightning protection device (3) and a discharge gap device (4); and the support (5) is arranged on the box wall of the transformer and is used for supporting the isolation switch (1), the lightning protection device (3) and the discharge gap device (4). The support (5) is used for placing the neutral point complete set protection device body near a neutral point bushing of the transformer, a frame is not used any more for placing the neutral point complete set protection device body near the transformer, safe distance between the live part and the transformer can be met, and thus discharge performances and safety performances of the transformer can be ensured.
Description
One, technical field
The utility model relates to a kind of neutral point complete set of protective apparatus, especially a kind of neutral point complete set of protective apparatus for 110kV-220kV transformer.
Two, background technology
110kV-220kV is the main electric pressure of electric power system; its neutral point generally adopts direct grounding way; due to relay protection setting configuration and prevent the requirement of the aspects such as communication interference, simultaneously in order to limit single-phase short circuit current, wherein there is some transformers to adopt isolated neutral mode.Under this operational mode, due to thunderbolt, single-phase grounding faults etc. can cause neutral point overvoltage, and transformer is graded insulation mostly, therefore the insulation of overvoltage centering point causes very large threat, must protective device Accident prevention be set to it occurs, therefore the neutral point complete set of protective apparatus for 110kV-220kV transformer is a kind of important electric equipment, in the electric power system of existing 110kV-220kV, the main mode that adopts lightning arrester and protection gap parallel running of transformer neutral point protection, adopt complete set of protective apparatus for transformer neutral point protection, include neutral point isolating switch, zinc oxide arrester, the parts such as discharging gap, all by a general frame, to be put into a side of transformer, for guaranteeing the safe distance of live part and transformer, needing to increase product takes up room.
Three, summary of the invention
In order to overcome above-mentioned technical disadvantages, the purpose of this utility model is to provide a kind of neutral point complete set of protective apparatus for transformer, has therefore guaranteed transformer discharge performance and transformer security performance.
For achieving the above object, the technical scheme that the utility model is taked is: include have isolating switch and lightning arrester and discharging gap apparatus neutral point complete set of protective apparatus body, be arranged on the tank wall of transformer and for supporting the support of isolating switch and lightning arrester and discharging gap apparatus.
Owing to having designed neutral point complete set of protective apparatus body and support; use support neutral point complete set of protective apparatus body is placed on transformer neutral bushing near; not re-using framework is put into neutral point complete set of protective apparatus body near transformer; meet the safe distance of live part and transformer, therefore guaranteed transformer discharge performance and transformer security performance.
The utility model has designed; neutral point complete set of protective apparatus body also includes control device; the neutral bushing of transformer is set to be connected with discharging gap apparatus with lightning arrester by isolating switch; control device is set to be connected with the operating device of isolating switch; isolating switch, lightning arrester and discharging gap apparatus are arranged on support; support is arranged on the side relative with the oil conservator of transformer and is set to and connects with the tank wall of transformer, and control device is arranged on the tank wall of transformer.
The utility model has designed, isolating switch, lightning arrester and discharging gap apparatus are successively set on support, and the center line setting of isolating switch, lightning arrester and discharging gap apparatus point-blank and be set to the cross central line vertical distribution with transformer.
The utility model has designed, isolating switch, lightning arrester and discharging gap apparatus are successively set on support, and the center line of isolating switch and lightning arrester is set to distribute with the transverse center line parallel of transformer and the center line of lightning arrester and discharging gap apparatus is set to the center line vertical distribution with isolating switch and lightning arrester 3.
Important technology in the technical program is characterised in that: be installed on transformer-cabinet; by tank wall or the dismountable mounting bracket of case lid, be fixed; be integrated with transformer, removed heavy pillar, avoid conventional neutral point complete set of protective apparatus to make underlying issue.This installs reasonable adjustment and respectively organizes component layouts and inner group parts spacing simultaneously, it is taken up room less, meets live part to transformer safe distance, can not cause on transformer the impacts such as electric discharge.Be installed near transformer neutral point, by tank wall upper bracket, be fixed on transformer.Neutral point isolating switch disconnecting link is opened direction towards transformer outside, and top terminal block is connected by connecting line with neutral bushing, and operating mechanism is installed on transformer, so that regulate disconnecting link opening and closing state.Lightning arrester terminal block and transformer neutral point 0 facies tract point part equipotential, to lightning arrester base (ground connection side) meet safe distance requirement, can suitably dwindle lightning arrester to transformer distance.Can effectively reduce the volume of device on this basis.This device isolating switch mechanism can turn to according to user or field requirement adjustment simultaneously, meets on-the-spot service requirement.
In the technical program; thereby the support connecting with the tank wall of transformer 5 guarantees that the safe distance of live part and transformer is important technical characterictic; technical field at the neutral point complete set of protective apparatus for transformer, has novelty, creativeness and practicality.
Four, accompanying drawing explanation
Fig. 1 is the schematic diagram of first embodiment of the present utility model:
Fig. 2 is the schematic diagram of second embodiment of the present utility model.
Five, embodiment
Fig. 1 is first embodiment of the present utility model, illustrates by reference to the accompanying drawings the present embodiment, includes isolating switch 1, control device 2, lightning arrester 3, discharging gap apparatus 4 and support 5,
The neutral bushing of transformer is set to be connected with discharging gap apparatus 4 with lightning arrester 3 by isolating switch 1, control device 2 is set to be connected with the operating device of isolating switch 1, isolating switch 1, lightning arrester 3 and discharging gap apparatus 4 are arranged on support 5, support 5 is arranged on the side relative with the oil conservator of transformer and is set to and connects with the tank wall of transformer, and control device 2 is arranged on the tank wall of transformer.
In the present embodiment, isolating switch 1, lightning arrester 3 and discharging gap apparatus 4 are successively set on support 5, and the center line setting of isolating switch 1, lightning arrester 3 and discharging gap apparatus 4 point-blank and be set to the cross central line vertical distribution with transformer.
Isolating switch 1 adopts the single-phase horizontal rotary open type isolating switch of GW13 type, and two moving contact synchronization actions when isolating switch 1 is opened, have synchronism highly, processes because isolating switch 1 contact adopts silver plating process simultaneously, has guaranteed isolating switch 1 electric conductivity.By the rotating folding of two moving contacts, realize the conversion of transformer neutral point ground connection and earth-free operation, thereby effectively guaranteed the conversion of 110kV-200kV transformer grounding and earth-free operational mode.
Control device 2 is fixed on transformer box wall, can conveniently carry out reliably local operation, with timed unit 2, there is remote operation function, and possess on the spot, the status signal such as remote operation and output local operation, remote operation, manual block, each loop pilot warning, thereby guaranteed the safe and reliable operation of isolating switch 1.
Lightning arrester 3 adopts gapless metal-oxide lighting arrester, and protection can be provided when transformer suffers Lightning Over-voltage.
Discharging gap 4 is the bar-shaped gap of level, and reliably protecting can be provided when internal overvoltage appears in transformer.
In second embodiment of the present utility model, isolating switch 1, lightning arrester 3 and discharging gap apparatus 4 are successively set on support 5, and the center line of isolating switch 1 and lightning arrester 3 is set to the transverse center line parallel distribution of transformer and the center line of lightning arrester 3 and discharging gap apparatus 4 is set to and the center line vertical distribution of isolating switch 1 and lightning arrester 3.
The utlity model has lower feature:
1, owing to having designed neutral point complete set of protective apparatus body and support 5; use support 5 neutral point complete set of protective apparatus body is placed on transformer neutral bushing near; not re-using framework is put into neutral point complete set of protective apparatus body near transformer; meet the safe distance of live part and transformer, therefore guaranteed transformer discharge performance and transformer security performance.
2, owing to having designed isolating switch 1, control device 2, lightning arrester 3 and discharging gap apparatus 4; isolating switch 1 realizes transformer neutral point ground connection and earth-free two kinds of operational modes transform; lightning arrester 3 is born atmospheric over voltage protection; discharging gap apparatus 4 is born internal overvoltage protection, has guaranteed the security performance of transformer operation.
3, owing to having designed support 5, guaranteed isolating switch 1, control device 2, lightning arrester 3 and discharging gap apparatus 4 one with transformer, facilitate neutral point complete set of protective apparatus body to mate with the work of transformer.
In the neutral point complete set of protective apparatus technical field for transformer; Every include have isolating switch 1 and lightning arrester 3 and discharging gap apparatus 4 neutral point complete set of protective apparatus body, be arranged on the tank wall of transformer and for the technology contents of support 5 that supports isolating switch 1 and lightning arrester 3 and discharging gap apparatus 4 all in protection range of the present utility model.
Claims (4)
1. the neutral point complete set of protective apparatus for transformer; It is characterized in that: include there is isolating switch (1) and lightning arrester (3) and discharging gap apparatus (4) neutral point complete set of protective apparatus body, be arranged on the tank wall of transformer and for supporting the support (5) of isolating switch (1) and lightning arrester (3) and discharging gap apparatus (4).
2. the neutral point complete set of protective apparatus for transformer according to claim 1, it is characterized in that: neutral point complete set of protective apparatus body also includes control device (2), the neutral bushing of transformer is set to be connected with discharging gap apparatus (4) with lightning arrester (3) by isolating switch (1), control device (2) is set to be connected with the operating device of isolating switch (1), isolating switch (1), lightning arrester (3) and discharging gap apparatus (4) are arranged on support (5), support (5) is arranged on the side relative with the oil conservator of transformer and is set to and connects with the tank wall of transformer, control device (2) is arranged on the tank wall of transformer.
3. the neutral point complete set of protective apparatus for transformer according to claim 2; It is characterized in that: it is upper that isolating switch (1), lightning arrester (3) and discharging gap apparatus (4) are successively set on support (5), the center line setting of isolating switch (1), lightning arrester (3) and discharging gap apparatus (4) point-blank and be set to the cross central line vertical distribution with transformer.
4. the neutral point complete set of protective apparatus for transformer according to claim 2; It is characterized in that: isolating switch (1), lightning arrester (3) and discharging gap apparatus (4) are successively set on support (5) above, the center line of isolating switch (1) and lightning arrester (3) is set to the transverse center line parallel distribution of transformer and the center line of lightning arrester (3) and discharging gap apparatus (4) is set to and the center line vertical distribution of isolating switch (1) and lightning arrester (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320674889.2U CN203553900U (en) | 2013-10-30 | 2013-10-30 | Neutral point complete set protection device for transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320674889.2U CN203553900U (en) | 2013-10-30 | 2013-10-30 | Neutral point complete set protection device for transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203553900U true CN203553900U (en) | 2014-04-16 |
Family
ID=50471969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320674889.2U Expired - Fee Related CN203553900U (en) | 2013-10-30 | 2013-10-30 | Neutral point complete set protection device for transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203553900U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048411A (en) * | 2015-09-06 | 2015-11-11 | 国家电网公司 | 220 kV transformer neutral point gap action control device and method |
| CN106532533A (en) * | 2015-09-11 | 2017-03-22 | 国家电网公司 | Vehicle-mounted mobile substation |
-
2013
- 2013-10-30 CN CN201320674889.2U patent/CN203553900U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048411A (en) * | 2015-09-06 | 2015-11-11 | 国家电网公司 | 220 kV transformer neutral point gap action control device and method |
| CN106532533A (en) * | 2015-09-11 | 2017-03-22 | 国家电网公司 | Vehicle-mounted mobile substation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140416 Termination date: 20191030 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |