CN102231519A - Tandem power supply surge protection device - Google Patents
Tandem power supply surge protection device Download PDFInfo
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- CN102231519A CN102231519A CN2011101911944A CN201110191194A CN102231519A CN 102231519 A CN102231519 A CN 102231519A CN 2011101911944 A CN2011101911944 A CN 2011101911944A CN 201110191194 A CN201110191194 A CN 201110191194A CN 102231519 A CN102231519 A CN 102231519A
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Abstract
The invention provides a tandem power supply surge protection device comprising a first voltage-limiting current-limiting branch circuit, a second voltage-limiting current-limiting branch circuit, a first inductance coil and a second inductance coil, wherein the first voltage-limiting current-limiting branch circuit comprises a first voltage dependent resistor, a second voltage dependent resistor and a third voltage dependent resistor; the first voltage dependent resistor is connected among wires to limit a voltage among the wires; nodes of the second and third voltage dependent resistors are earthed to limit a voltage between the earth and the wires; the second voltage-limiting current-limiting branch circuit comprises a fourth voltage dependent resistor, a fifth voltage dependent resistor and a sixth voltage dependent resistor; and the sixth voltage dependent resistor is connected among the wires to limit the voltage among the wires, and nodes of the fourth and fifth voltage dependent resistors are earthed to limit the voltage between the earth and the wires. The tandem power supply surge protection device also comprises an isolation transformer, wherein primary coils of the isolation transformer are communicated with nodes of the voltage-limiting current-limiting branch circuit, and follow-up coils of the isolation transformer are used for output. Based on the structure, the tandem power supply surge protection device can be used for realizing multi-level voltage-limiting current-limiting and electromagnetic isolation, thus the residual voltage of the tandem power supply surge protective device is lower under the conditions of lightning stroke and high electromagnetic pulse, and electric equipment is protected more effectively.
Description
Technical field
The present invention relates to a kind of lightning protection device for electric power.
Background technology
Present prior art, a kind of tandem lightning protection for power supply comprises the first pressure-limit current-limit branch road, the second pressure-limit current-limit branch road, first inductance coil and second inductance coil; First pressure-limit current-limit props up route first, second, third piezo-resistance and constitutes, and first piezo-resistance is connected between line as pressure limiting between line, and second, third piezo-resistance node ground connection is as pressure limiting between line ground; Second pressure-limit current-limit props up route fourth, fifth, six, the six piezo-resistances and is connected between line as pressure limiting between line, and the 4th, the 5th piezo-resistance node ground connection is as pressure limiting between line ground.Existing problems are: still have bigger surge current to be transported in subordinate's circuit, have potential safety hazard.
Summary of the invention
The objective of the invention is: a kind of tandem lightning protection for power supply is provided, and it can carry out pressure-limit current-limit and electromagnetic isolation to surge high pressure ground effectively, thereby makes the back step voltage stable, has eliminated potential safety hazard.
The present invention is achieved in that a kind of tandem lightning protection for power supply, comprises the first pressure-limit current-limit branch road, the second pressure-limit current-limit branch road, first inductance coil and second inductance coil; First pressure-limit current-limit props up route first, second, third piezo-resistance and constitutes, and first piezo-resistance is connected between line as pressure limiting between line, and second, third piezo-resistance node ground connection is as pressure limiting between line ground; Second pressure-limit current-limit props up route fourth, fifth, six piezo-resistances, and the 6th piezo-resistance is connected between line as pressure limiting between line, and the 4th, the 5th piezo-resistance node ground connection is as pressure limiting between line ground; Its special character is: also comprise an isolating transformer, the primary coil of isolating transformer is communicated with the second pressure-limit current-limit branch node, the back level coil output of isolating transformer.
Described a kind of tandem lightning protection for power supply, its special character is: also comprise the 3rd pressure limiting branch road,
The 3rd pressure-limit current-limit props up route the 7th piezo-resistance and the 8th piezo-resistance and the 9th piezo-resistance series arm and constitutes; The 7th piezo-resistance is connected between line as pressure limiting between line, the 8th, the 9th piezo-resistance node ground connection; The 3rd pressure limiting stream branch road is connected on the subordinate of back level coil.
A kind of tandem lightning protection for power supply comprises an isolating transformer and the 3rd pressure limiting branch road, and described the 3rd pressure-limit current-limit props up route the 7th piezo-resistance and the 8th piezo-resistance and the 9th piezo-resistance series arm and constitutes; The 7th piezo-resistance is connected between line as pressure limiting between line, the 8th, the 9th piezo-resistance node ground connection;
The 3rd pressure limiting stream branch road is connected on the subordinate of back level coil; The primary coil of isolating transformer is communicated with power line.
A kind of tandem lightning protection for power supply of the present invention owing to adopt such structure, has been realized multistage pressure-limit current-limit, and electromagnetic isolation, thereby it is lower to have reached in thunderbolt and electromagnetism high impulse its residual voltage, more effectively protects power consumption equipment.
Description of drawings
Fig. 1 is a circuit diagram of the present invention.
Fig. 2 is the circuit diagram of second embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.
Embodiment 1
As shown in Figure 1, a kind of tandem lightning protection for power supply comprises the first pressure-limit current-limit branch road, the second pressure-limit current-limit branch road, the first inductance coil L1 and the second inductance coil L2; First pressure-limit current-limit props up route first, second, third piezo-resistance R1, R2, R3 and constitutes, and the first piezo-resistance R1 is connected between line as pressure limiting between line, and second, third piezo-resistance R2, R3 node ground connection E are as pressure limiting between line ground; Second pressure-limit current-limit props up route fourth, fifth, six piezo-resistance R4, R5, R6, and the 6th piezo-resistance R6 is connected between line as pressure limiting between line, and the 4th, the 5th piezo-resistance R4, R5 node ground connection E are as pressure limiting between line ground; Also comprise an isolating transformer, the primary coil of isolating transformer is communicated with the second pressure-limit current-limit branch node, the back level coil output of isolating transformer.
As further improving: also comprise the 3rd pressure limiting branch road,
The 3rd pressure-limit current-limit props up route the 7th piezo-resistance R7 and the 8th piezo-resistance R8 and the 9th piezo-resistance R9 series arm and constitutes; The 7th piezo-resistance R7 is connected between line as pressure limiting between line, the 8th, the 9th piezo-resistance R8, R9 node ground connection E;
The 3rd pressure limiting stream branch road is connected on the subordinate of back level coil.
Embodiment 2
As shown in Figure 2, a kind of tandem lightning protection for power supply comprises an isolating transformer and the 3rd pressure limiting branch road, and described the 3rd pressure-limit current-limit props up route the 7th piezo-resistance R7 and the 8th piezo-resistance R8 and the 9th piezo-resistance R9 series arm and constitutes; The 7th piezo-resistance R7 is connected between line as pressure limiting between line, the 8th, the 9th piezo-resistance R8, R9 node ground connection;
The 3rd pressure limiting stream branch road is connected on the subordinate of back level coil; The primary coil of isolating transformer is communicated with power line.
Above-described only is preferential execution mode of the present invention.Should be pointed out that for the person of ordinary skill of the art under the situation that does not break away from the principle of the invention, can also make some improvement and modification, this also is considered as protection scope of the present invention.
Claims (3)
1. a tandem lightning protection for power supply comprises the first pressure-limit current-limit branch road, the second pressure-limit current-limit branch road, first inductance coil and second inductance coil; First pressure-limit current-limit props up route first, second, third piezo-resistance and constitutes, and first piezo-resistance is connected between line as pressure limiting between line, and second, third piezo-resistance node ground connection is as pressure limiting between line ground; Second pressure-limit current-limit props up route fourth, fifth, six piezo-resistances, and the 6th piezo-resistance is connected between line as pressure limiting between line, and the 4th, the 5th piezo-resistance node ground connection is as pressure limiting between line ground; It is characterized in that: also comprise an isolating transformer, the primary coil of isolating transformer is communicated with the second pressure-limit current-limit branch node, the back level coil output of isolating transformer.
2. a kind of tandem lightning protection for power supply according to claim 1 is characterized in that: also comprise the 3rd pressure limiting branch road,
The 3rd pressure-limit current-limit props up route the 7th piezo-resistance and the 8th piezo-resistance and the 9th piezo-resistance series arm and constitutes; The 7th piezo-resistance is connected between line as pressure limiting between line, the 8th, the 9th piezo-resistance node ground connection;
The 3rd pressure limiting stream branch road is connected on the subordinate of back level coil.
3. a tandem lightning protection for power supply comprises an isolating transformer and the 3rd pressure limiting branch road, and described the 3rd pressure-limit current-limit props up route the 7th piezo-resistance and the 8th piezo-resistance and the 9th piezo-resistance series arm and constitutes; The 7th piezo-resistance is connected between line as pressure limiting between line, the 8th, the 9th piezo-resistance node ground connection;
The 3rd pressure limiting stream branch road is connected on the subordinate of back level coil; The primary coil of isolating transformer is communicated with power line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101911944A CN102231519A (en) | 2011-07-08 | 2011-07-08 | Tandem power supply surge protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101911944A CN102231519A (en) | 2011-07-08 | 2011-07-08 | Tandem power supply surge protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102231519A true CN102231519A (en) | 2011-11-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101911944A Pending CN102231519A (en) | 2011-07-08 | 2011-07-08 | Tandem power supply surge protection device |
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| Country | Link |
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| CN (1) | CN102231519A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103972862A (en) * | 2014-04-18 | 2014-08-06 | 南京信息工程大学 | Lightning protection type over-voltage and under-voltage protective device capable of automatically resetting |
| CN105162102A (en) * | 2014-06-09 | 2015-12-16 | 山东纵深科技发展有限公司 | Lightning protection grounding-free isolation transformer and application of lightning protection grounding-free isolation transformer to lightning protection for communication broadband box and electric energy gatherer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2133956Y (en) * | 1992-04-08 | 1993-05-19 | 刘继 | General/safety voltage distribution transformer |
| US5689180A (en) * | 1995-12-13 | 1997-11-18 | Carlson; Curt S. | Isolated electrical power supply |
| CN2935576Y (en) * | 2006-08-03 | 2007-08-15 | 叶林 | Lightning stroke protector for earth-free power source |
| CN201178306Y (en) * | 2008-03-11 | 2009-01-07 | 顾江山 | Surge protector for video, data and electric power |
-
2011
- 2011-07-08 CN CN2011101911944A patent/CN102231519A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2133956Y (en) * | 1992-04-08 | 1993-05-19 | 刘继 | General/safety voltage distribution transformer |
| US5689180A (en) * | 1995-12-13 | 1997-11-18 | Carlson; Curt S. | Isolated electrical power supply |
| CN2935576Y (en) * | 2006-08-03 | 2007-08-15 | 叶林 | Lightning stroke protector for earth-free power source |
| CN201178306Y (en) * | 2008-03-11 | 2009-01-07 | 顾江山 | Surge protector for video, data and electric power |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103972862A (en) * | 2014-04-18 | 2014-08-06 | 南京信息工程大学 | Lightning protection type over-voltage and under-voltage protective device capable of automatically resetting |
| CN103972862B (en) * | 2014-04-18 | 2016-08-17 | 南京信息工程大学 | One automatically resets thunder-proof type overvoltage/undervoltage protection device |
| CN105162102A (en) * | 2014-06-09 | 2015-12-16 | 山东纵深科技发展有限公司 | Lightning protection grounding-free isolation transformer and application of lightning protection grounding-free isolation transformer to lightning protection for communication broadband box and electric energy gatherer |
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Application publication date: 20111102 |