CN203179688U - Intelligent voltage transformer - Google Patents
Intelligent voltage transformer Download PDFInfo
- Publication number
- CN203179688U CN203179688U CN 201320049551 CN201320049551U CN203179688U CN 203179688 U CN203179688 U CN 203179688U CN 201320049551 CN201320049551 CN 201320049551 CN 201320049551 U CN201320049551 U CN 201320049551U CN 203179688 U CN203179688 U CN 203179688U
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- instrument transformer
- short circuit
- intelligent
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Abstract
The utility model relates to an intelligent voltage transformer which is an indispensable part in electrical equipment, and belongs to the technical field of the electrical equipment. The intelligent voltage transformer is provided with a signal detecting unit, a signal processing unit and an execution unit. When the signal detecting unit detects short circuit signals, the execution unit cuts off a short circuit source immediately to guarantee the transformer to be not damaged, when short circuit faults are removed, the signal detecting unit determines that a short circuit state does not exist, the execution unit unlocks immediately, and the transformer can be restored to work normally. The intelligent voltage transformer breaks the statement that a voltage transformer explodes or is burnt necessarily in a second short circuit said in an existing textbook, when a short circuit happens to the secondary voltage of the voltage transformer, damage can be effectively avoided, great significance is achieved to the development of electricity industries, and meanwhile obvious economical benefits and social benefits are achieved.
Description
Technical field
The utility model relates to a kind of intelligent voltage instrument transformer, and voltage transformer is indispensable part in the power equipment, belongs to electrical equipment technical field.
Background technology
The secondary output voltage terminal of existing electromagnetic potential transformer does not allow to be under the short-circuit condition works, and will blast or burn phenomenon in case be short-circuited, and can't guarantee that power equipment normally moves.Existing traditional voltage transformer mainly is made up of iron core, high-tension coil, 100 volts of output windings of secondary standard and a shell etc.When primary winding inserted high pressure, secondary coil was exported 100 volts of voltages for usefulness such as protections, measurement, metering, indications, in case will burn when the secondary voltage short circuit takes place, caused very big economic loss.In addition, prior art has only installation insurance silk or air switch for the protection of the method for voltage transformer, but the protection low precision is operated loaded down with trivial details.
The utility model content
The purpose of this utility model provides a kind of intelligent voltage instrument transformer, solve existing electromagnetic potential transformer because of structural factor, exist and when the secondary voltage short circuit, will burn, thereby cause the very defective of large economy loss, be not damaged when being implemented in 100 volts of short circuits of secondary of instrument transformer by the utility model, be conducive to guarantee the safe operation of power equipment.
The purpose of this utility model is achieved by the following technical solution, a kind of intelligent voltage instrument transformer, comprise a high-tension coil, secondary operating voltage coil on shell, iron core, the iron core, it is characterized in that low-voltage coil and the power circuit going back signalization collecting unit, signal processing unit, performance element, reset signal unit and power supply is provided for these unit in the described instrument transformer; The output that is attempted by the signal gathering unit of secondary operating voltage coil output connects the input of operational amplifier in the signal processing unit, the output of comparator connects the base stage of triode in the performance element in the signal processing unit, the normally closed contact of performance element repeat circuit is serially connected in the output loop of secondary operating voltage coil, and the normally closed contact that is serially connected in secondary operating voltage coil output loop repeat circuit constitutes the reset signal unit with the electronic devices and components that are connected across the normally closed contact two ends; Low-voltage coil is 6 volts of windings, and the output of 6 volts of windings connects power circuit.
Described signal gathering unit is made of with the resistance that the serial connection point is connected with an end two series resistances that are attempted by secondary operating voltage coil output.
Described signal processing unit comprises amplifier U1A and comparator U1B, and U1A and U1B adopt LM358.
Described performance element comprises the relay coil that triode is connected with its collector electrode.
The described electronic devices and components that are connected across the relay normally closed contact two ends are resistance or inductance or electric capacity.
Described resistance is 7.5-15K.
The utility model is by signalization detecting unit, signal processing unit, performance element on instrument transformer, when detecting unit detects short-circuit signal, performance element is cutting-off of short-circuit source immediately, guarantee that instrument transformer is not damaged, when short trouble is got rid of, detecting unit confirms that performance element is release immediately not under short-circuit condition, recovers the instrument transformer operate as normal.When having broken said voltage transformer secondary voltage short circuit in the existing textbook, the utility model will inevitably blast or burn the saying of phenomenon, becoming voltage transformer secondary voltage can effectively avoid damaging when being short-circuited, development for power industry is significant, and has remarkable economic efficiency and social benefit simultaneously.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is the utility model block diagram;
Fig. 3 is the circuit diagram in the utility model;
Among the figure, 1 iron core, 2 high pressure windings, 3 secondary 100V windings, the 4 secondary 6V winding of powering, 5 control boards, 6 voltage transformers, 7 power supply units, 8 reset signal unit, 9 signal processing units, 10 signal gathering unit, 11 performance elements.
Embodiment
Further specify the utility model below in conjunction with drawings and Examples, as shown in Figure 1, 2, the utility model is by shell, iron core 1, the sub-high pressure winding 2 on the iron core 1, secondary operating voltage winding 3,4 and comprise the control board 5 of signal gathering unit 10, signal processing unit 9, performance element 11, reset signal unit 8 and constitute for these unit provide the operating voltage winding of power supply and power circuit; The output that is attempted by the signal gathering unit 10 of secondary operating voltage winding output connects the input of operational amplifier in the signal processing unit 9, the output of comparator connects the base stage of triode in the performance element 11 in the signal processing unit 9, the normally closed contact of performance element 11 repeat circuits is serially connected in the output loop of secondary operating voltage winding, the normally closed contact that is serially connected in secondary operating voltage winding output loop repeat circuit constitutes reset signal unit 8 with the electronic devices and components that are connected across the normally closed contact two ends, the electronic devices and components that are connected across the relay normally closed contact two ends are resistance or inductance or electric capacity, and described resistance is 7.5-15K; Low-voltage coil is 6 volts of windings, and the output of 6 volts of windings connects power circuit.
As shown in Figure 3, when voltage transformer 6 once inserted 10kV or 35kV voltage, secondary side induced the alternating voltage of 100V, was connected with the above-mentioned control unit that arranges, and secondary side 6V voltage is connected with the rectification circuit of control unit.The signal gathering unit of being made up of resistance R 1 and R2 10 sends into by resistance R 3 that operational amplifier U1A carries out the rectification amplification in the signal processing unit 9, the comparator that signal after the amplification is sent into U1B compares, because U1B 5 pin current potentials are higher than 6 pin current potentials, U1B no-output voltage, triode Q1 in the performance element 11 ends, relay J 1 coil does not have electric current to pass through, and relay is failure to actuate, the instrument transformer operate as normal.U1A and U1B adopt LM358.
When voltage transformer secondary 100V load is short-circuited; the signal gathering unit 10 collection signals of being made up of resistance R 1 and R2 are zero; operational amplifier U1A no signal output in the signal processing unit 9; when comparator U1B5 pin current potential was lower than 6 pin current potentials, comparator U1B exported high level, and triode Q1 is saturated; relay J 1 action; the relay normally closed contact action is cut off 100V output, thereby has been protected voltage transformer.
After short trouble is got rid of, offer signal gathering unit 10 by resistance R 8, obtain signal after resistance R 1 and the R2 dividing potential drop and send into operational amplifier U1A in the signal processing unit 9 by resistance R 3, amplifier has output, comparator U1B5 pin current potential is higher than 6 pin current potentials, comparator U1B no-output, and triode Q1 ends, relay recovery is to normally off, instrument transformer operate as normal.
The power circuit of 6 volts of winding output connections can adopt existing ripe circuit in the utility model.
Each concrete feature described in above-mentioned embodiment can be carried out combination in any by any suitable method, and it falls within the scope disclosed in the utility model equally.Simultaneously, can combination in any between the various execution mode of the present utility model, as long as it is without prejudice to thought of the present utility model, it should look content disclosed in the utility model equally.In addition; the utility model is not limited to the detail in the above-mentioned execution mode; in technical conceive scope of the present utility model, can carry out multiple simple modification to the technical solution of the utility model, these simple modification all belong to protection range of the present utility model.Protection range of the present utility model is defined by the claims.
Claims (6)
1. intelligent voltage instrument transformer, comprise a high-tension coil, secondary operating voltage coil on shell, iron core, the iron core, it is characterized in that low-voltage coil and the power circuit going back signalization collecting unit, signal processing unit, performance element, reset signal unit and power supply is provided for these unit in the described instrument transformer; The output that is attempted by the signal gathering unit of secondary operating voltage coil output connects the input of operational amplifier in the signal processing unit, the output of comparator connects the base stage of triode in the performance element in the signal processing unit, the normally closed contact of performance element repeat circuit is serially connected in the output loop of secondary operating voltage coil, and the normally closed contact that is serially connected in secondary operating voltage coil output loop repeat circuit constitutes the reset signal unit with the electronic devices and components that are connected across the normally closed contact two ends; Low-voltage coil is 6 volts of windings, and the output of 6 volts of windings connects power circuit.
2. intelligent voltage instrument transformer according to claim 1 is characterized in that, described signal gathering unit is made of with the resistance that the serial connection point is connected with an end two series resistances that are attempted by secondary operating voltage coil output.
3. intelligent voltage instrument transformer according to claim 1 is characterized in that, described signal processing unit comprises operational amplifier U1A and comparator U1B, and U1A and U1B adopt LM358.
4. intelligent voltage instrument transformer according to claim 1 is characterized in that, described performance element comprises the relay coil that triode is connected with its collector electrode.
5. intelligent voltage instrument transformer according to claim 1 is characterized in that, the described electronic devices and components that are connected across the relay normally closed contact two ends are resistance or inductance or electric capacity.
6. intelligent voltage instrument transformer according to claim 5 is characterized in that, described resistance is 7.5-15K.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320049551 CN203179688U (en) | 2013-01-30 | 2013-01-30 | Intelligent voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320049551 CN203179688U (en) | 2013-01-30 | 2013-01-30 | Intelligent voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203179688U true CN203179688U (en) | 2013-09-04 |
Family
ID=49076352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320049551 Withdrawn - After Issue CN203179688U (en) | 2013-01-30 | 2013-01-30 | Intelligent voltage transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203179688U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103077816A (en) * | 2013-01-30 | 2013-05-01 | 江苏博斯特科技电力有限公司 | Intelligent voltage transformer |
| CN107132463A (en) * | 2017-06-09 | 2017-09-05 | 国网吉林省电力有限公司长春供电公司 | Secondary windings of PT short-circuit preventing device |
-
2013
- 2013-01-30 CN CN 201320049551 patent/CN203179688U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103077816A (en) * | 2013-01-30 | 2013-05-01 | 江苏博斯特科技电力有限公司 | Intelligent voltage transformer |
| CN103077816B (en) * | 2013-01-30 | 2016-03-30 | 江苏博斯特科技电力有限公司 | Intelligent voltage transformer |
| CN107132463A (en) * | 2017-06-09 | 2017-09-05 | 国网吉林省电力有限公司长春供电公司 | Secondary windings of PT short-circuit preventing device |
| CN107132463B (en) * | 2017-06-09 | 2023-06-23 | 国网吉林省电力有限公司长春供电公司 | Short circuit preventing device for secondary winding of voltage transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130904 Effective date of abandoning: 20160330 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |