CN202405751U - Overload protection device of intelligent distribution transformer - Google Patents
Overload protection device of intelligent distribution transformer Download PDFInfo
- Publication number
- CN202405751U CN202405751U CN2012200316405U CN201220031640U CN202405751U CN 202405751 U CN202405751 U CN 202405751U CN 2012200316405 U CN2012200316405 U CN 2012200316405U CN 201220031640 U CN201220031640 U CN 201220031640U CN 202405751 U CN202405751 U CN 202405751U
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- CN
- China
- Prior art keywords
- distribution transformer
- switch
- overload protection
- measuring device
- current measuring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses an overload protection device of an intelligent distribution transformer. The overload protection device comprises a current measuring device, a trip controller and a switch strip device, wherein the current measuring device is arranged on a total wire inlet switch on a low-voltage side of the distribution transformer; the current measuring device is connected with a power supply line to acquire a current signal; an output end of the current measuring device is connected with a signal input end of the trip controller; the output end of the trip controller is connected with a control end of the switch strip device to control the switch trip device to operate; and the switch strip device is linked with the total wire inlet switch. The overload protection device of the intelligent distribution transformer has the advantages that an overload protector is arranged on the low-voltage side of the power supply line, switch trip time is set according to an actual rated current value of the distribution transformer, damage to the distribution transformer due to long overload time or shortening of the service life can be avoided, and misoperation caused by large current which is generated due to starting of high-power equipment can be distinguished. Compared with the conventional protection measures, the overload protection device of the intelligent distribution transformer has the advantages of high accuracy, flexibility in protection and the like.
Description
Technical field
The utility model relates to a kind of overload protection arrangement, especially a kind of intelligent power distribution transformer overload protective device.
Background technology
More and more because of Add User now (being mainly the user of factory), it is also increasing to apply to install capacity, and frequent generation transformer in service burns because of user's overlond running or seriously reduces transformer useful life.Thereby be badly in need of user transformers is carried out overload protection research, user transformers can be moved on safety economy ground.Existing technology is general only installs microcomputer protecting device at 10kV distribution transforming cabinet, sets current value.The method error is bigger, can not accurately carry out overload protection.
The utility model content
For satisfying the needs in market, the overload protection arrangement that the utility model proposed has solved the problem of distribution transformer overlond running, and the protection transformer does not reduce useful life or damage because of overlond running.
The technical scheme that the utility model is taked is:
A kind of intelligent power distribution transformer overload protective device; Comprise current measuring device, tripping controller and switch trip gear on the total input-wire switch of the low-pressure side that is installed in distribution transformer; Wherein said current measuring device is connected with supply line and obtains current signal; Its output is connected with the signal input part of said tripping controller; The output of said tripping controller is connected with the control end of switch trip gear controlling the action of said switch trip gear, and said switch trip gear and said total input-wire switch be interlock mutually.
The beneficial effect of the utility model is:
For solving the problem of distribution transformer overload protection; The utility model is installed overload protection in the low-pressure side of supply line; By the actual load current value configuration switch trip time of distribution transforming; Damage or reduce useful life to reach the protection distribution transforming, distinguish the misoperation that the big electric current that causes because of the powerful device startup produces simultaneously because of overload time is long.Compare with existing safeguard measure, have the precision height, protect advantages such as flexible.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is described further.
Fig. 1 is the wiring schematic diagram of the utility model.
Embodiment
Intelligent power distribution transformer overload protective device disclosed in the utility model is installed on the total input-wire switch 5 of low-pressure side (0.4kV) of distribution transformer 4; It comprises current measuring device 1, tripping controller 2 and switch trip gear 3, so that distribution transformer 4 is carried out intelligent overload protection.
In the embodiment shown in fig. 1; Current measuring device 1 is connected with the supply line of 0.4kV side and obtains current signal; Its output is connected with the signal input part of tripping controller 2; The output of tripping controller 2 is connected with the control end of switch trip gear 3 with the dropout of control switch trip gear 2 action, certainly, switch trip gear 2 must with total input-wire switch 5 interlock mutually.
The size of current that current measuring device 1 monitoring is in real time passed through on the total input-wire switch 5 of distribution transformer 4; When it surpasses preset load current value; Obtain the current value signal and signal passed to the tripping controller 2 of installation; The timer of building in the tripping controller 2 picks up counting according to the signal that receives; If when current value was still greater than preset rated value when timing finishes, tripping controller 2 sent actuating signals and gives switch trip gear 3,3 actions of switch trip gear make the total input-wire switch trip of low-pressure side.When timing finished, if current value is less than rated value (this is generally powerful device and starts the transient high-current that causes), switch trip gear 3 was failure to actuate, and the timer of tripping controller 2 resets.
The utility model is installed overload protection in the low-pressure side of supply line; By the actual load current value configuration switch trip time of distribution transforming; Damage or reduce useful life to reach the protection distribution transforming, distinguish the misoperation that the big electric current that causes because of the powerful device startup produces simultaneously because of overload time is long.Compare with existing safeguard measure, have the precision height, protect advantages such as flexible.
The above be the utility model preferred embodiment, it does not constitute the restriction to the utility model protection range, so long as realize that with essentially identical means the purpose of the utility model all should belong to the protection range of the utility model.
Claims (1)
1. intelligent power distribution transformer overload protective device; It is characterized in that: comprise current measuring device (1), tripping controller (2) and switch trip gear (3) on the total input-wire switch of the low-pressure side that is installed in distribution transformer; Wherein said current measuring device (1) is connected with supply line and obtains current signal; Its output is connected with the signal input part of said tripping controller (2); The output of said tripping controller (2) is connected with the control end of switch trip gear (3) controlling the action of said switch trip gear (2), and said switch trip gear (2) and said total input-wire switch be interlock mutually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200316405U CN202405751U (en) | 2012-02-01 | 2012-02-01 | Overload protection device of intelligent distribution transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200316405U CN202405751U (en) | 2012-02-01 | 2012-02-01 | Overload protection device of intelligent distribution transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202405751U true CN202405751U (en) | 2012-08-29 |
Family
ID=46703368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200316405U Expired - Fee Related CN202405751U (en) | 2012-02-01 | 2012-02-01 | Overload protection device of intelligent distribution transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202405751U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105529686A (en) * | 2016-01-19 | 2016-04-27 | 国家电网公司 | Overload protection method and apparatus for distribution transformer of low voltage distribution line |
-
2012
- 2012-02-01 CN CN2012200316405U patent/CN202405751U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105529686A (en) * | 2016-01-19 | 2016-04-27 | 国家电网公司 | Overload protection method and apparatus for distribution transformer of low voltage distribution line |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: GUANGDONG TIANNENG ELECTRIC POWER DESIGN CO., LTD. Free format text: FORMER NAME: FOSHAN SANSHUI TONGLIDA ELECTRIC POWER DESIGN CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 528100 Gao Fengwo, Nanfeng Avenue, Xinan street, Sanshui District, Guangdong, Foshan Patentee after: Guangdong Tianneng Electric Power Design Co., Ltd. Address before: 528100 Gao Fengwo, Nanfeng Avenue, Xinan street, Sanshui District, Guangdong, Foshan Patentee before: Foshan Sanshui District Tonglida Electric Power Design Co.,Ltd. |
|
| 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: 20120829 Termination date: 20170201 |