CN201069700Y - High-stability dry three-phase combined mutual inductor - Google Patents
High-stability dry three-phase combined mutual inductor Download PDFInfo
- Publication number
- CN201069700Y CN201069700Y CNU2007200137531U CN200720013753U CN201069700Y CN 201069700 Y CN201069700 Y CN 201069700Y CN U2007200137531 U CNU2007200137531 U CN U2007200137531U CN 200720013753 U CN200720013753 U CN 200720013753U CN 201069700 Y CN201069700 Y CN 201069700Y
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- phase
- circuit
- protecting
- winding
- transformer
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Abstract
The utility model discloses a highly stable dry three-phase combined transformer. Three-phase high-voltage terminals A, B and C are provided and connected with two potential transformers in three-phase V/V connection. Two current transformers are connected in series with phase A and phase C respectively. Protecting windings (1) are arranged on the two current transformers respectively. By arranging an overcurrent protecting winding or a differential protecting winding to cooperate with a relay protecting device, the utility model can cut off faulty circuit to protect the circuit and devices in the circuit when a failure occurs in the circuit. Only 400 yuan is needed for adding the protecting windings to the combined instrument transformer, so that the cost is reduced while the expenses for mounting and maintenance are curtailed.
Description
Technical field:
The utility model relates to a kind of metering three-phase combination transformer, the high stability dry-type three-phase combined transformer that especially a kind of cost performance is higher.
Background technology:
At present, three-phase combination transformer is widely used in electricity market electricity consumption marketing as a kind of new electric energy metering device.But along with power load and with the increase of electric line, line failure rate also increasing, when circuit breaks down, is easy to burn the equipment on circuit and the circuit, for this reason, usually need increase protective relaying device on existing circuit.Three-phase combination transformer in the past has only the metering winding; there are not overcurrent protection or differential protection winding; when being installed, protective relaying device also two protection Outdoor Current Transformers to be installed especially; and these two current transformer prices are about 1.2 ten thousand yuan, and this has just increased circuit operating cost greatly.
Summary of the invention:
The utility model provides a kind of current transformer that need not to be equipped with at the above-mentioned deficiency of prior art, has the high stability dry-type three-phase combined transformer of protecting winding.
Technical solution of the present utility model is: a kind of high stability dry-type three-phase combined transformer, be provided with A, B, C three-phase high-voltage end, and join by the three-phase V/V mode of connection and two voltage transformers; A also is connected in series current transformer respectively mutually with C mutually, is respectively arranged with protection winding 1 on two current transformers.
Described protection winding 1 can be overcurrent protection winding or differential protection winding.
The utility model does not need especially again current transformer to be installed, but by overcurrent protection or differential protection winding are installed, cooperates with protective relaying device, and when circuit broke down, the disengagement failure circuit was with the equipment on protection circuit and the circuit.Only need 400 yuan and in combination transformer, increase the protection winding, promptly saved cost, reduced expenses such as installation and maintenance again.
Description of drawings:
Fig. 1 is a structure principle chart of the present utility model.
Embodiment:
Below in conjunction with description of drawings embodiment of the present utility model.
As shown in Figure 1, a kind of high stability dry-type three-phase combined transformer is made up of two voltage transformers and two current transformers.Be provided with A, B, C three-phase high-voltage end, join by the three-phase V/V mode of connection and two all insulations voltage transformer with no-load voltage ratio; A is connected in series the current transformer of same current no-load voltage ratio mutually mutually respectively with C, be respectively arranged with overcurrent protection winding or differential protection winding on two current transformers.
Claims (2)
1. a high stability dry-type three-phase combined transformer is provided with A, B, C three-phase high-voltage end, joins by the three-phase V/V mode of connection and two voltage transformers; A also is connected in series current transformer respectively mutually with C mutually, it is characterized in that: be respectively arranged with protection winding (1) on two current transformers.
2. high stability dry-type three-phase combined transformer according to claim 1 is characterized in that: described protection winding (1) is overcurrent protection winding or differential protection winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200137531U CN201069700Y (en) | 2007-08-07 | 2007-08-07 | High-stability dry three-phase combined mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200137531U CN201069700Y (en) | 2007-08-07 | 2007-08-07 | High-stability dry three-phase combined mutual inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201069700Y true CN201069700Y (en) | 2008-06-04 |
Family
ID=39491089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200137531U Expired - Fee Related CN201069700Y (en) | 2007-08-07 | 2007-08-07 | High-stability dry three-phase combined mutual inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201069700Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104764918A (en) * | 2015-03-16 | 2015-07-08 | 中国计量学院 | Three-phase combined type transformer based on orthogonal coordinate transformation output |
-
2007
- 2007-08-07 CN CNU2007200137531U patent/CN201069700Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104764918A (en) * | 2015-03-16 | 2015-07-08 | 中国计量学院 | Three-phase combined type transformer based on orthogonal coordinate transformation output |
| CN104764918B (en) * | 2015-03-16 | 2017-12-22 | 中国计量学院 | Type three phase combined mutual-inductor based on orthogonal coordinate system conversion output |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080604 Termination date: 20110807 |