CN201717628U - Surge preventive protection circuit of pressure transmitter - Google Patents
Surge preventive protection circuit of pressure transmitter Download PDFInfo
- Publication number
- CN201717628U CN201717628U CN2010202396161U CN201020239616U CN201717628U CN 201717628 U CN201717628 U CN 201717628U CN 2010202396161 U CN2010202396161 U CN 2010202396161U CN 201020239616 U CN201020239616 U CN 201020239616U CN 201717628 U CN201717628 U CN 201717628U
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- CN
- China
- Prior art keywords
- discharge tube
- pressure transmitter
- protection circuit
- surge
- lightning discharge
- Prior art date
- 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
Links
- 230000003449 preventive effect Effects 0.000 title abstract 3
- 230000001052 transient effect Effects 0.000 claims abstract description 14
- 230000001629 suppression Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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Abstract
A surge preventive protection circuit of a pressure transmitter belongs to the field of automatic pressure testing and control systems, and is characterized by comprising two transient voltage suppressors, two wire wound resistors and a discharge tube. An input end and an output end of the transmitter are respectively connected with the wire wound resistors and then respectively connected with the transient voltage suppressors, the transient voltage suppressors are grounded and then connected with the lightning discharge tube in a two-stage manner, a third pin of the lightning discharge tube is grounded, and two pins of the lightning discharge tube are respectively connected with pins of an external power supply. The surge preventive protection circuit is used for the pressure transmitter, can effectively form protection against surge impact, and greatly improves reliability of a product.
Description
Technical field
The utility model belongs to pressure automatic test, control system field, is specifically related to a kind of pressure transmitter anti-surge protection circuit.
Background technology
For a long time; field instrument is located in adverse circumstances and but can not get protection; these field instrument damage rates are very high; because it is on the low side that separate unit is worth; protect difficulty bigger than normal in addition; protect focus that everybody notes substantially all on power supply or some indoor large equipment (as computer, controller, display) about surge,, rarely have in the prior art to relate to for the protective circuit of pressure transmitter.
Summary of the invention
The utility model provides a kind of pressure transmitter anti-surge protection circuit, is used for pressure transmitter, can effectively form protection to surge impact, improves reliability of products greatly.
The following technical scheme of the concrete employing of the utility model:
A kind of pressure transmitter anti-surge protection circuit; it is characterized in that; comprise two Transient Suppression Diodes, two wire-wound resistors and-individual discharge tube; transmitter input and the wiring of output difference are around resistance; link to each other with Transient Suppression Diode respectively then, Transient Suppression Diode ground connection links to each other with lightning discharge pipe two-stage again; lightning discharge pipe tripod ground connection, the bipod of lightning discharge pipe connects the end pin of external power source respectively.
Circuit of the present utility model can will be struck by lightning or the power system operation transient state at every turn, the system failure, and the high-energy surge that switch motion the produced harassing and wrecking in the transmission of electricity circuit absorb, and can improve the ability of protection greatly to back stage pressure transmitter circuit.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Among the figure, 1-1,1-2 are the transient control diode, and 2-1,2-2 are wire-wound resistor, and 3 is discharge tube.
Embodiment
As shown in Figure 1; a kind of pressure transmitter anti-surge protection circuit; comprise two Transient Suppression Diodes (1-1,1-2), two wire-wound resistors (2-1,2-2) and-individual discharge tube 3; transmitter input and the wiring of output difference are around resistance (2-1,2-2); link to each other with two Transient Suppression Diodes (1-1,1-2) respectively then; Transient Suppression Diode (1-1,1-2) ground connection; link to each other with discharge tube 3 two-stages again; discharge tube 3 tripod ground connection, the bipod of discharge tube 3 connect the end pin of external power source respectively.
The anti-surge wiring board process test passes that adopts the utility model to make, the standard foundation is GB/T17626.5-1999 EMC test and measuring technique surge (impact) immunity experiment (idtIEC61000-4-5:1995)
Experimental grade is:
| Standard class | Open circuit experimental voltage (± 10%), kV |
| 4 | 4(8/20us) |
Claims (1)
1. pressure transmitter anti-surge protection circuit; it is characterized in that; comprise two Transient Suppression Diodes, two wire-wound resistors and-individual discharge tube; transmitter input and the wiring of output difference are around resistance; link to each other with Transient Suppression Diode respectively then, Transient Suppression Diode ground connection links to each other with lightning discharge pipe two-stage again; lightning discharge pipe tripod ground connection, the bipod of lightning discharge pipe connects the end pin of external power source respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202396161U CN201717628U (en) | 2010-06-28 | 2010-06-28 | Surge preventive protection circuit of pressure transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202396161U CN201717628U (en) | 2010-06-28 | 2010-06-28 | Surge preventive protection circuit of pressure transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201717628U true CN201717628U (en) | 2011-01-19 |
Family
ID=43463634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202396161U Expired - Fee Related CN201717628U (en) | 2010-06-28 | 2010-06-28 | Surge preventive protection circuit of pressure transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201717628U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699004A (en) * | 2016-04-26 | 2016-06-22 | 成都众山科技有限公司 | Wireless pressure transmitter based on wifi |
-
2010
- 2010-06-28 CN CN2010202396161U patent/CN201717628U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699004A (en) * | 2016-04-26 | 2016-06-22 | 成都众山科技有限公司 | Wireless pressure transmitter based on wifi |
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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: 20110119 Termination date: 20120628 |