CN102013664A - Protection device for transformer - Google Patents
Protection device for transformer Download PDFInfo
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- CN102013664A CN102013664A CN201010584528XA CN201010584528A CN102013664A CN 102013664 A CN102013664 A CN 102013664A CN 201010584528X A CN201010584528X A CN 201010584528XA CN 201010584528 A CN201010584528 A CN 201010584528A CN 102013664 A CN102013664 A CN 102013664A
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- circuit
- triode
- transformer
- resistance
- switching circuit
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Abstract
The invention provides a protection device for a transformer. The protection device comprises the transformer, a first switching circuit, an absorbing circuit, a second switching circuit and a load, wherein the output of the transformer is connected to the first switching circuit, the first switching circuit is connected in series with the second switching circuit, the second switching circuit is connected with the load, and the absorbing circuit is connected in parallel with the first switching circuit and connected in series with the second switching circuit. The first switching circuit is disconnected to electrify the isolating transformer to instantly design the absorbing circuit, so the current impact can be reduced, and the impact can be quickly attenuated; after finishing, the absorbing circuit is cut off, and the first switching circuit is switched; and meanwhile, when the load is over-voltage, the second switching circuit is disconnected to protect the transformer. The protection device has simple circuits, is easy to operate, and can protect high-value components.
Description
Technical field
The present invention relates to the transformer circuit technical field, particularly a kind of protective device that is used for transformer.
Background technology
There is saturated phenomenon in general transformer iron core when stable state, and the idle-loaded switching-on impulse current is very big, can cause overcurrent tripping, simultaneously the components and parts in the also more fragile circuit.
Summary of the invention
At the deficiency that above-mentioned transformer is in operation, the invention provides a kind of protective device that is used for transformer, this protective device can reduce the rush of current amount, can also make to impact decay rapidly, helps protecting the components and parts of high value.
A kind of protective device that is used for transformer; comprise transformer, first switching circuit, absorb circuit, second switch circuit and load; described transformer output is connected with first switching circuit; first switching circuit is connected with the second switch circuit; the output of second switch circuit is connected with load, is connected in series with the second switch circuit after absorbing circuit and first switching circuit being in parallel.
Described first switching circuit is made up of first triode, first relay, first resistance, the 4th resistance and first diode, the first relay switch end series transformer, a termination power in the two ends in addition, one terminates to the collector electrode of first triode, the emitter grounding of first triode, first resistance connects the base stage and the first control mouth of first triode, and the 4th resistance connects the emitter-base bandgap grading and the first control mouth of first triode, and first diode connects the collector electrode of the power supply and first triode.When initially powering on, the first control mouthful output low level, first triode ends; first relay switch disconnects; then transformer output is connected to the absorption circuit, absorbs circuit impact electric current and the absorption of band overvoltage protection, powers on a period of time; after impulse current and band overvoltage protection are very little; control mouthful output high level, the first triode conducting, the first relay switch closure; then transformer output is directly connected to the second switch circuit, absorbs circuit by short circuit.
Described second switch circuit is by second triode, second relay, second resistance, the 5th resistance and second diode are formed, the second relay switch end, first switching circuit of connecting, a termination power in the two ends in addition, one terminates to the collector electrode of second triode, the emitter grounding of second triode, second resistance connects the base stage and the second control mouth of second triode, the 5th resistance connects the emitter-base bandgap grading and the second control mouth of second triode, second diode connects the collector electrode of the power supply and second triode, and the series connection of second switch circuit absorbs circuit when first switching circuit disconnects.When the load overvoltage, the second control mouthful output low level, second triode ends, and second relay switch disconnects, and then transformer is disconnected, the protection transformer.
Described absorption circuit comprises the 3rd resistance and the 6th resistance, and described the 3rd resistance and the 6th resistance and transformer are connected in series, and is connected in parallel with first switching circuit.When initially powering on, the first control mouthful output low level, transformer output is connected to the absorption circuit, and the 3rd resistance and the 6th resistance absorb impulse current and band overvoltage protection.
The present invention utilizes first switching circuit to be broken as isolating transformer powered on moment design absorption circuit; can reduce the rush of current amount; can also make and impact decay rapidly; should absorb the circuit excision after finishing again; be converted to first switching circuit, the second switch circuit disconnects the protection transformer when the load overvoltage simultaneously, and circuit of the present invention is simple; easy operating, but and the high components and parts of conservation value.
Description of drawings
Fig. 1 is a schematic diagram of the present invention;
Fig. 2 is the prior art schematic diagram;
Fig. 3 is the circuit diagram of the embodiment of the invention.
Embodiment
The present invention is described further below in conjunction with the drawings and specific embodiments.
As shown in Figure 2, common circuit is that transformer directly is connected with load.As shown in Figure 1, the present invention increases by first switching circuit 2, absorption circuit 3, second switch circuit 4 between original transformer 1 and load 5.Absorb circuit 3 and be parallel to first switching circuit 2, the initial condition that powers on transformer 1 output is connected to the absorption circuit, absorb circuit 3 and be connected in series to second switch circuit 4, back transformer 1 output that finishes is connected to first switching circuit 2, first switching circuit 2 is connected in series to second switch circuit 4, and second switch circuit 4 connects load 5.
As shown in Figure 3; a kind of protective device that is used for transformer; comprise transformer 1, first switching circuit 2, absorb circuit 3, second switch circuit 4 and load 5; described transformer 1 output is connected with first switching circuit 2; first switching circuit 2 is connected with second switch circuit 4; the output of second switch circuit 4 is connected with load 5, absorbs circuit 3 and is connected in series with second switch circuit 4 with first switching circuit, 2 backs in parallel.
Described first switching circuit 2 is by the first triode V225, first relay K 201, first resistance R 231, the 4th resistance R 234 and the first diode V227 form, first relay K, 201 switch terminals series transformers 1, a termination 12V power supply in the two ends in addition, one terminates to the collector electrode of the first triode V225, the emitter grounding of the first triode V225, first resistance R 231 connects the base stage and the first control mouthful PC5 of the first triode V225, the 4th resistance R 234 connects the emitter-base bandgap grading and the first control mouthful PC5 of the first triode V225, and the first diode V227 connects the collector electrode of the power supply and the first triode V225.When initially powering on, the first control mouthful output low level, first triode ends; first relay switch disconnects; then transformer output is connected to the absorption circuit, absorbs circuit impact electric current and the absorption of band overvoltage protection, powers on a period of time; after impulse current and band overvoltage protection are very little; control mouthful output high level, the first triode conducting, the first relay switch closure; then transformer output is directly connected to the second switch circuit, absorbs circuit by short circuit.
Described second switch circuit 4 is by the second triode V226, second relay K 202, second resistance R 232, the 5th resistance R 235 and the second diode V228 form, second relay K, 202 switch terminals, first switching circuit 2 of connecting, a termination 12V power supply in the two ends in addition, one terminates to the collector electrode of the second triode V226, the emitter grounding of the second triode V226, second resistance R 232 connects the base stage and the second control mouthful PC4 of the second triode V226, the 5th resistance R 235 connects the emitter-base bandgap grading and the second control mouthful PC4 of the second triode V226, the second diode V228 connects the collector electrode of the power supply and the second triode V226, and 4 series connection of second switch circuit absorb circuit 3 when first switching circuit 2 disconnects.When the load overvoltage, the second control mouthful output low level, second triode ends, and second relay switch disconnects, and then transformer is disconnected, the protection transformer.
Described absorption circuit comprises the 3rd resistance R 101 and the 6th resistance R 102, and described the 3rd resistance R 101 and the 6th resistance R 102 series connection backs are connected in series with transformer 1, are connected in parallel with first switching circuit 2.When initially powering on, the first control mouthful output low level, transformer output is connected to the absorption circuit, and the 3rd resistance and the 6th resistance absorb impulse current and band overvoltage protection.
Present embodiment utilizes first switching circuit to be broken as isolating transformer powered on moment design absorption circuit; can reduce the rush of current amount; can also make and impact decay rapidly; should absorb the circuit excision after finishing again; be converted to first switching circuit, the second switch circuit disconnects the protection transformer when the load overvoltage simultaneously, and circuit of the present invention is simple; easy operating, but and the high components and parts of conservation value.
Claims (4)
1. protective device that is used for transformer; it is characterized in that: comprise transformer (1), first switching circuit (2), absorb circuit (3), second switch circuit (4) and load (5); described transformer (1) output is connected with first switching circuit (2); first switching circuit (2) is connected with second switch circuit (4); the output of second switch circuit (4) is connected with load (5), absorbs circuit (3) back in parallel with first switching circuit (2) and is connected in series with second switch circuit (4).
2. the protective device that is used for transformer according to claim 1; it is characterized in that: described first switching circuit (2) is by first triode (V225); first relay (K201); first resistance (R231); the 4th resistance (R234) and first diode (V227) are formed; first relay (K201) switch terminals series transformer (1); a termination power in the two ends in addition; one terminates to the collector electrode of first triode (V225); the emitter grounding of first triode (V225); first resistance (R231) connects the base stage and first control mouthful (PC5) of first triode (V225); the 4th resistance (R234) connects the emitter-base bandgap grading and first control mouthful (PC5) of first triode (V225), and first diode (V227) connects the collector electrode of power supply and first triode (V225).
3. the protective device that is used for transformer according to claim 1; it is characterized in that: described second switch circuit (4) is by second triode (V226); second relay (K202); second resistance (R232); the 5th resistance (R235) and second diode (V228) are formed; second relay (K202) switch terminals, first switching circuit (2) of connecting; a termination power in the two ends in addition; one terminates to the collector electrode of second triode (V226); the emitter grounding of second triode (V226); second resistance (R232) connects the base stage and second control mouthful (PC4) of second triode (V226); the 5th resistance (R235) connects the emitter-base bandgap grading and second control mouthful (PC4) of second triode (V226); second diode (V228) connects the collector electrode of power supply and second triode (V226), and second switch circuit (4) series connection absorbs circuit (3) when first switching circuit (2) disconnects.
4. the protective device that is used for transformer according to claim 1; it is characterized in that: described absorption circuit comprises the 3rd resistance (R101) and the 6th resistance (R102); described the 3rd resistance (R101) and the 6th resistance (R102) are connected in series with transformer (1), are connected in parallel with first switching circuit (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010584528 CN102013664B (en) | 2010-12-13 | 2010-12-13 | Protection device for transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010584528 CN102013664B (en) | 2010-12-13 | 2010-12-13 | Protection device for transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102013664A true CN102013664A (en) | 2011-04-13 |
| CN102013664B CN102013664B (en) | 2013-04-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010584528 Active CN102013664B (en) | 2010-12-13 | 2010-12-13 | Protection device for transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102013664B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102789307A (en) * | 2012-06-29 | 2012-11-21 | 浪潮电子信息产业股份有限公司 | Energy-saving design method and device for restraining instant impact current of high-power fan |
| CN102931647A (en) * | 2011-08-10 | 2013-02-13 | 海洋王照明科技股份有限公司 | Surge current suppression circuit and lamp |
| CN106356814A (en) * | 2016-09-07 | 2017-01-25 | 南京南瑞继保电气有限公司 | Series transformer winding overvoltage protection method based on voltage vector difference |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11252908A (en) * | 1998-02-27 | 1999-09-17 | Hitachi Ltd | Voltage stabilizing device |
| WO2009143967A1 (en) * | 2008-05-29 | 2009-12-03 | Abb Research Ltd | Protection system for voltage transformers |
| CN201536254U (en) * | 2009-09-04 | 2010-07-28 | 山东卓尔电气有限公司 | Protector for power transformer |
| CN201994634U (en) * | 2010-12-13 | 2011-09-28 | 海信科龙电器股份有限公司 | Protection device for transformer |
-
2010
- 2010-12-13 CN CN 201010584528 patent/CN102013664B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11252908A (en) * | 1998-02-27 | 1999-09-17 | Hitachi Ltd | Voltage stabilizing device |
| WO2009143967A1 (en) * | 2008-05-29 | 2009-12-03 | Abb Research Ltd | Protection system for voltage transformers |
| CN201536254U (en) * | 2009-09-04 | 2010-07-28 | 山东卓尔电气有限公司 | Protector for power transformer |
| CN201994634U (en) * | 2010-12-13 | 2011-09-28 | 海信科龙电器股份有限公司 | Protection device for transformer |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931647A (en) * | 2011-08-10 | 2013-02-13 | 海洋王照明科技股份有限公司 | Surge current suppression circuit and lamp |
| CN102931647B (en) * | 2011-08-10 | 2016-03-02 | 海洋王照明科技股份有限公司 | A kind of surge current suppression circuit and light fixture |
| CN102789307A (en) * | 2012-06-29 | 2012-11-21 | 浪潮电子信息产业股份有限公司 | Energy-saving design method and device for restraining instant impact current of high-power fan |
| CN106356814A (en) * | 2016-09-07 | 2017-01-25 | 南京南瑞继保电气有限公司 | Series transformer winding overvoltage protection method based on voltage vector difference |
| CN106356814B (en) * | 2016-09-07 | 2018-10-16 | 南京南瑞继保电气有限公司 | A kind of series transformer winding over-voltage protection method based on voltage vector difference |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102013664B (en) | 2013-04-03 |
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