CN203193269U - Current transformer overvoltage protection device - Google Patents
Current transformer overvoltage protection device Download PDFInfo
- Publication number
- CN203193269U CN203193269U CN 201320186017 CN201320186017U CN203193269U CN 203193269 U CN203193269 U CN 203193269U CN 201320186017 CN201320186017 CN 201320186017 CN 201320186017 U CN201320186017 U CN 201320186017U CN 203193269 U CN203193269 U CN 203193269U
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- China
- Prior art keywords
- overvoltage protection
- current transformer
- protection device
- model
- utility
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- 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 a current transformer overvoltage protection device. The device comprises a primary side and a secondary side of a current transformer. An output terminal of the secondary side is connected with a microcomputer-type CT overvoltage protection device. The overvoltage protection device is connected with an alternating current power supply. The output terminal of the overvoltage protection device is provided with a fault alarm buzzer. By using the device, an accident caused by a secondary open circuit of the current transformer can be effectively prevented. The microcomputer-type CT overvoltage protection device adopts a high performance chip. A processing speed is fast. Reliability is high and an anti-interference capability is strong.
Description
Technical field
The utility model relates to differential winding, the protection winding of the various CT secondary sides of 110kV and following electric pressure, the abnormal overvoltage protection, particularly a kind of current transformer over-pressure safety device of measuring winding, standby winding etc.
Background technology
The current transformer overvoltage protection is mainly used in differential winding, the protection winding of the various CT secondary sides of 110kV and following electric pressure, the abnormal overvoltage protection of measuring winding, standby winding etc.The secondary winding open circuit if be in operation, or a winding flows through abnormal current (as lightning current, resonance overcurrent, electric capacity charging current, inductance starting current etc.), all can produce the overvoltage of thousands of volts even volts up to ten thousand at secondary side.This not only works the mischief to electrical secondary system insulation, also can make the too drastic and scaling loss of instrument transformer, even the life security that jeopardizes the staff.
The utility model content
The purpose of this utility model provides a kind of current transformer over-pressure safety device, and this device can effectively prevent the accident that causes because of Current Transformer Secondary open circuit.Microcomputer type CT overvoltage protection adopts high performance chips, has that processing speed is fast, reliability is high, antijamming capability is strong.
The purpose of this utility model realizes by following technical proposals.
A kind of current transformer overvoltage protection comprises the overvoltage protection that is connected with the secondary side output of current transformer, and described overvoltage protection and AC power are joined, and are provided with the fault alarm buzzer at the overvoltage protection output.
Described overvoltage protection is microcomputer type CT overvoltage protection, is divided into 12 model DC-201～212, but one road winding to ten, two road windings of difference protective current instrument transformer secondary side.
This novel overvoltage protection can effectively prevent the accident that causes because of the Current Transformer Secondary open circuit.Microcomputer type CT overvoltage protection adopts high performance chips, has the advantages that processing speed is fast, reliability is high, antijamming capability is strong.
Description of drawings
Fig. 1 is the utility model structural representation.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in further details.
As shown in Figure 1; the utility model provides a kind of current transformer over-pressure safety device; the primary side and the secondary side that comprise current transformer; the output of described secondary side is connected with overvoltage protection; described overvoltage protection and AC power are joined, and are provided with the fault alarm buzzer at the overvoltage protection output.The overvoltage protection of this device is taked microcomputer type CT overvoltage protection.
Overvoltage protection is divided into 12 model DC-201～212, but one road winding to ten, two road windings of the corresponding secondary side of protective current instrument transformer respectively.
The circuit of this device in the ordinary course of things, instrument transformer all is connected on A, B, the C three-phase, minority is connected on the two-phase, is connected one individually and goes up mutually.The overwhelming majority is Y-connection, and the minority triangle connects.This product current transformer protector is the secondary winding Y-connection.Secondary winding A, B, C correspondence are connected on protector A, B, the C binding post.A, B, C three-phase secondary central point (virtual earth N) are connected on " N " binding post of protector.If only with an A, B winding, C mutually can not wiring, can not influence the protector operate as normal.Alternating current 220V 50Hz power supply inserts protector for inner electric elements usefulness, and three passive signal lines are drawn for the user and used, and external interchange or direct current all can.
The utility model current transformer over-pressure safety device is connected to the secondary winding two ends, and leakage current is minimum when normally moving, and becomes high-impedance state.When abnormal overvoltage takes place when, handle according to logic and judge and screening, move the corresponding transformer secondary circuit of short circuit rapidly, to play the effect of protection CT, show the position of fault on the panel simultaneously, and passive signal output is arranged simultaneously.After fault is got rid of, circuit restores to the original state, reset protective device normal operation input work again by reset button.
Above content is to further describing that the utility model is done in conjunction with concrete preferred implementation; can not assert that embodiment of the present utility model only limits to this; for the utility model person of an ordinary skill in the technical field; under the prerequisite that does not break away from the utility model design; can also make some simple deduction or replace, all should be considered as belonging to the utility model by the determined scope of patent protection of claims of submitting to.
Claims (2)
1. current transformer over-pressure safety device; it is characterized in that: comprise the overvoltage protection that is connected with the secondary side output of current transformer; described over-pressure safety device and AC power are joined, and are provided with the fault alarm buzzer at the overvoltage protection output.
2. a kind of current transformer over-pressure safety device according to claim 1, it is characterized in that: described overvoltage protection is microcomputer type CT overvoltage protection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320186017 CN203193269U (en) | 2013-04-15 | 2013-04-15 | Current transformer overvoltage protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320186017 CN203193269U (en) | 2013-04-15 | 2013-04-15 | Current transformer overvoltage protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203193269U true CN203193269U (en) | 2013-09-11 |
Family
ID=49110099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320186017 Expired - Fee Related CN203193269U (en) | 2013-04-15 | 2013-04-15 | Current transformer overvoltage protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203193269U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106098349A (en) * | 2016-08-12 | 2016-11-09 | 山东亿玛信诺电气有限公司 | Secondary side combination transformer not being afraid of open circuit and preparation method thereof |
-
2013
- 2013-04-15 CN CN 201320186017 patent/CN203193269U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106098349A (en) * | 2016-08-12 | 2016-11-09 | 山东亿玛信诺电气有限公司 | Secondary side combination transformer not being afraid of open circuit and preparation method thereof |
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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: 20130911 Termination date: 20190415 |