CN204464034U - High pressure zero sequence current mutual inductor - Google Patents
High pressure zero sequence current mutual inductor Download PDFInfo
- Publication number
- CN204464034U CN204464034U CN201520180099.8U CN201520180099U CN204464034U CN 204464034 U CN204464034 U CN 204464034U CN 201520180099 U CN201520180099 U CN 201520180099U CN 204464034 U CN204464034 U CN 204464034U
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- China
- Prior art keywords
- silica gel
- limited post
- shell
- holddown groove
- sequence current
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Abstract
The utility model belongs to high voltage electrical apparatus technical field, is specifically related to a kind of high pressure zero sequence current mutual inductor.Comprise silica gel shell, silica gel full skirt, silica gel full skirt and silica gel shell are wholely set, and are connected to the side of silica gel shell, are provided with the holddown groove placing iron core in silica gel shell, be provided with a hollow silica gel limited post in holddown groove, silica gel limited post hollow forms fenestra.Said structure shell, the associated components such as full skirt all have employed the material of silica gel, soft, insulating properties is fine, conveniently transport storage, be not easy to damage, keep its performance, holddown groove and limited post is provided with in silica gel shell, so when installation, as long as put into iron core then to seal and just complete installation, overall weight very light, sealing is also fine, utilize the cooperation of limited post, the fixing limit effect of iron core is also fine, overall structure greatly reduces cost, and save a lot of intermediate step, the time of processing is very short, also very convenient when installing, rate of finished products is very high.
Description
Technical field
The utility model belongs to high voltage electrical apparatus technical field, is specifically related to a kind of high pressure zero sequence current mutual inductor.
Background technology
In high voltage electrical apparatus technical field, high pressure zero sequence current mutual inductor when electric power system produces zero sequence earth current with protective relaying device or signal with the use of, make device element action, realize protection or monitor.
When there is electric shock or leak current fault in circuit, instrument transformer secondary side exports zero-sequence current, makes the equipment protection action on connect secondary line (cut off the electricity supply, report to the police etc.).Zero-sequence current protection embody rule respectively can fill a current transformer (CT) on three-phase line, or allow three-phase conducting wire together through a zero sequence CT, also on neutral line N, a zero sequence CT can be installed, utilize these C.T to detect three-phase current phasor and, i.e. zero-sequence current Io, IA+IB+IC=Io, (the no ground fault when the three-phase load complete equipilibrium that circuit connects, and do not consider the leakage current of circuit, electric equipment), Io=0; As the three-phase load unbalance that circuit connects, then Io=IN, zero-sequence current is now unsymmetrical current IN; When a certain earth fault of generation mutually, certainly leading to a single-phase earth fault current Id, the zero-sequence current IO=IN+Id now detected, is the vector of three phase unbalance current and single-phase-to-ground current.
Traditional high pressure zero sequence current mutual inductor is made up of four parts, housing, full skirt, iron core, instrument transformer, structurally there is very large defect, normally adopt outdoor epoxy package, and full skirt is also outdoor epoxy resin, iron core is put in film chamber, then resin pouring sealing moulding is carried out, and insulating barrier all had in arms by the instrument transformer in inside, the structure of resin pouring sealing needs heating in seal process, cooling, dry the process of equitemperature change, often can destroy the enamelled wire (insulating barrier) of instrument transformer so in this process, damage overall product, and the weight weight very of the rear integral product of sealing, and be all hard object, when transport or storage, be easy to breakage, full skirt is also, as long as there is the damaged creepage distance just affecting full skirt, therefore performance neither be very stable, and cost is very high, process time is also very long.
Utility model content
The purpose of this utility model is, provides that a kind of cost is low, process time is short, facilitate the high pressure zero sequence current mutual inductor of transport and storage.
The utility model solves the technical scheme that its technical problem adopts: a kind of high pressure zero sequence current mutual inductor, comprise silica gel shell, silica gel full skirt, silica gel full skirt and silica gel shell are wholely set, and be connected to the side of silica gel shell, the holddown groove placing iron core is provided with in silica gel shell, be provided with a hollow silica gel limited post in holddown groove, silica gel limited post hollow forms fenestra.
This arranges shell, the associated components such as full skirt all have employed the material of silica gel, soft, insulating properties is fine, conveniently transport storage, be not easy to damage, keep its performance, holddown groove and limited post is provided with in silica gel shell, so when installation, as long as put into iron core then to seal and just complete installation, overall weight very light, sealing is also fine, utilize the cooperation of limited post, the fixing limit effect of iron core is also fine, overall structure greatly reduces cost, and save a lot of intermediate step, the time of processing is very short, also very convenient when installing, rate of finished products is very high.
Of the present utility modelly to be set to further: also comprise silica gel sealing lid, silica gel cover top portion opening, opening is provided with one with the sealed step of silica gel sealing lid adaptation, silica gel sealing lid is stuck in sealed step, blend compounds water-stop.
This arranges the material that seal cover also uses silica gel, utilizes and further increases sealing with the structure of sealed step clamping, keep its sealing, by glue sealing binding silica gel material, the structure of sealing is very firm, is not easy to destroy, ensures in transport and storage not damaged.
Of the present utility modelly to be set to further: cover the spacing ring be provided with holddown groove adaptation at silica gel sealing, silica gel sealing covers the perforation corresponding with silica gel limited post, silica gel limited post is adaptive with perforation and coordinate with perforation grafting.
This is arranged on seal cover and is provided with spacing ring and perforation, further improves integrally-built compactedness, coordinates simultaneously, fix, ensure the stability of its performance to ferrous with holddown groove, overall structure not only the cost time that is low but also that process short.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Known with reference to figure 1, a kind of high pressure zero sequence current mutual inductor of the utility model, comprise silica gel shell 1, silica gel full skirt 2, silica gel full skirt 2 and silica gel shell 1 are wholely set, and be connected to the side of silica gel shell 1, the holddown groove 11 placing iron core is provided with in silica gel shell 1, a hollow silica gel limited post 12 is provided with in holddown groove 11, silica gel limited post 12 hollow forms fenestra 121, also comprise silica gel sealing lid 3, silica gel shell 1 open top, opening is provided with one with the sealed step 13 of silica gel sealing lid 3 adaptation, silica gel sealing lid 3 is stuck in sealed step 13, blend compounds water-stop, silica gel sealing lid 3 is provided with the spacing ring 31 with holddown groove 11 adaptation, perforation 32 corresponding with silica gel limited post 12 on silica gel sealing lid 3, silica gel limited post 12 is adaptive with perforation 32 and coordinate with perforation 32 grafting.
Obviously, above-described embodiment is only used to done citing is clearly described, and the restriction not to execution mode.To those of ordinary skill in the art, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all execution modes.And thus the apparent change of extending out or variation be still in protection range of the present utility model.
Claims (3)
1. a high pressure zero sequence current mutual inductor, it is characterized in that: comprise silica gel shell, silica gel full skirt, silica gel full skirt and silica gel shell are wholely set, and be connected to the side of silica gel shell, the holddown groove placing iron core is provided with in silica gel shell, be provided with a hollow silica gel limited post in holddown groove, silica gel limited post hollow forms fenestra.
2. according to high pressure zero sequence current mutual inductor according to claim 1, it is characterized in that: also comprise silica gel sealing lid, silica gel cover top portion opening, opening is provided with one with the sealed step of silica gel sealing lid adaptation, silica gel sealing lid is stuck in sealed step, blend compounds water-stop.
3. according to the high pressure zero sequence current mutual inductor described in claim 1 or 2, it is characterized in that: cover the spacing ring be provided with holddown groove adaptation at silica gel sealing, silica gel sealing covers the perforation corresponding with silica gel limited post, and silica gel limited post is adaptive with perforation and coordinate with perforation grafting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520180099.8U CN204464034U (en) | 2015-03-27 | 2015-03-27 | High pressure zero sequence current mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520180099.8U CN204464034U (en) | 2015-03-27 | 2015-03-27 | High pressure zero sequence current mutual inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204464034U true CN204464034U (en) | 2015-07-08 |
Family
ID=53670885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520180099.8U Expired - Fee Related CN204464034U (en) | 2015-03-27 | 2015-03-27 | High pressure zero sequence current mutual inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204464034U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106057454A (en) * | 2016-06-27 | 2016-10-26 | 国网江苏省电力公司盐城供电公司 | Middle-high voltage zero sequence current transformer |
| CN111880138A (en) * | 2020-08-19 | 2020-11-03 | 国网福建省电力有限公司 | Zero-sequence current transformer measurement accuracy optimization method based on ferromagnetic characteristics |
-
2015
- 2015-03-27 CN CN201520180099.8U patent/CN204464034U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106057454A (en) * | 2016-06-27 | 2016-10-26 | 国网江苏省电力公司盐城供电公司 | Middle-high voltage zero sequence current transformer |
| CN111880138A (en) * | 2020-08-19 | 2020-11-03 | 国网福建省电力有限公司 | Zero-sequence current transformer measurement accuracy optimization method based on ferromagnetic characteristics |
| CN111880138B (en) * | 2020-08-19 | 2022-11-08 | 国网福建省电力有限公司 | Zero-sequence current transformer measurement accuracy optimization method based on ferromagnetic characteristics |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150708 Termination date: 20190327 |