CN102354943B - A kind of method of work of electronic trip unit - Google Patents
A kind of method of work of electronic trip unit Download PDFInfo
- Publication number
- CN102354943B CN102354943B CN201110278943.7A CN201110278943A CN102354943B CN 102354943 B CN102354943 B CN 102354943B CN 201110278943 A CN201110278943 A CN 201110278943A CN 102354943 B CN102354943 B CN 102354943B
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- voltage
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- trip unit
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Abstract
The method of work of the electronic trip unit of the present invention, Current Transformer carries out signal detection, becomes the lowest output voltage to supply other links primary big current transformation；After signal takes out, through bridge rectifier and rc filter circuit, it is transformed into DC voltage, then through electric resistance partial pressure, input signal comparing element, realizes signal with silicon voltage regulator diode or unijunction transistor and compare；When signal voltage exceedes the peak point voltage of the breakdown voltage of stabilivolt or double-basis pole pipe, they just turn on, and have signal to export；After trigger turns on, the armature adhesive of electromagnetic release or induction electrical apparatus release will be made, or make conductive current different because of polarity, weaken the magnetic flux of permanent magnet, allow the armature release on electrical apparatus release, and finally make draw bar move, circuit breaker trip.Can guarantee that the safety of circuit, it makes the defencive function of chopper be gradually improved, and controls more flexible, operates easier.It is highly sensitive, and protection working range is big.
Description
Technical field
The present invention relates to the method for work of a kind of electronic trip unit.
Background technology
Carrying, distribute, using in electric energy, chopper is most basic protection device for switching element, occupies of crucial importance
Position, range of application is quite varied, instead of fuse in industrial, civilian and architectural electric field the most comprehensively.Chopper
Mainly have two big functions: one is the switching function starting, stopping electrical equipment, two be transship at circuit or electrical equipment,
The defencive function of power supply is automatically cut off during short trouble.Defencive function is chopper very important use function, is that protection is used
Electricity equipment and the important means of personal safety.The basic defencive function of chopper mainly has overload protection and short-circuit protection, also may be used
Show with additional earth leakage protective, ground protection, parameter and the function such as network communication.The protection of modern chopper is with control core just
It it is electronic trip unit.At present, produce both at home and abroad and the chopper of use is generally thermal trip and magnetictrip.But, existing
Some electrical apparatus release defencive function imperfections, control the most dumb, operation complexity.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of defencive function and is gradually improved, and controls more flexible, and operation is more
Add the method for work of the electronic trip unit of simplicity.
For solving above-mentioned technical problem, the present invention adopts the following technical scheme that this electronic trip unit is by signal detection, signal
Comparison, delay circuit, triggering circuit, power supply, voltage stabilizing, when rolling for a long time, triggering, executive component and transformer composition；Mutual with electric current
Sensor carries out signal detection, becomes the lowest output voltage to supply other links primary big current transformation, in the overload of regulation
In the range of multiple, should be proportional between defeated people's electric current and the output voltage of transformer, namely linear relationship；Signal takes out
After, through bridge rectifier and rc filter circuit, it is transformed into DC voltage, then through electric resistance partial pressure, input signal comparing element,
Realize signal with silicon voltage regulator diode or unijunction transistor to compare；When signal voltage exceedes the breakdown voltage of stabilivolt or double-basis pole pipe
During peak point voltage, they just turn on, and have signal to export；After trigger turns on, electromagnetic release or electromagnetic induction will be made
The armature adhesive of formula electrical apparatus release, or make conductive current different because of polarity, weakens the magnetic flux of permanent magnet, allows the armature on electrical apparatus release
Release, finally makes draw bar move, circuit breaker trip.
Further, described delay circuit includes long delay and short time delay, instantaneous.
Further, described sensor uses senior cold-reduced silicon sheet or the fe-Ni soft magnetic alloy i.e. permalloy of high magnetic conduction
Manufacture.
Further, described delay circuit is RC integrating circuit, prolonging needed for borrowing the charging interval controlling capacitor to obtain
Time the time；Triggering link uses Schmitt trigger to trigger IGCT, is allowed to turn on；Delay circuit and trigger are by an electricity
Source transformer-supplied.
Further, for ensureing that each link remains to normally work when main circuit is short-circuited so that voltage reduces, use
Jumbo filter capacitor.
The method of work of the electronic trip unit of the present invention, can guarantee that the safety of circuit, and relative to existing technologies, it makes to break
The defencive function of road device is gradually improved, and controls more flexible, operates easier.It is highly sensitive, and protection working range is big.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the method for work of electronic trip unit of the present invention.
Detailed description of the invention
In the present embodiment, shown in Fig. 1, the method for work of this electronic trip unit, Current Transformer carries out signal detection, it
Essence is a kind of electric current: voltage changer.The lowest output voltage is become to supply other links primary big current transformation.Requirement
Its output voltage can reflect that rule that input current changes is to improve accuracy of action faithfully.To this end, in regulation
In the range of overload magnification, should be proportional between defeated people's electric current and the output voltage of transformer, namely linear relationship.Want real
This point existing, usual transformer uses senior cold-reduced silicon sheet or the i.e. permalloy manufacture of fe-Ni soft magnetic alloy of high magnetic conduction.Letter
After number taking out, through bridge rectifier and rc filter circuit, it is transformed into DC voltage, then through electric resistance partial pressure, input signal ratio
Relatively link, realizes signal with silicon voltage regulator diode or unijunction transistor and compares.When signal voltage exceedes the breakdown voltage of stabilivolt or double
During the peak point voltage of base stage pipe, they just turn on, and have signal to export.Delay circuit is RC integrating circuit, borrows and controls capacitor
Charging interval obtain needed for delay time.Triggering link uses Schmitt trigger to trigger IGCT, is allowed to turn on.Prolong
Time circuit and trigger powered by a mains transformer.For ensureing when main circuit is short-circuited so that voltage reduces, each ring
Joint remains to normally work, and have employed jumbo filter capacitor.After trigger turns on, electromagnetic release or electromagnetism sense will be made
Answer the armature adhesive of formula electrical apparatus release, or make conductive current different because of polarity, weaken the magnetic flux of permanent magnet, allow the rank on electrical apparatus release
Ferrum discharges, and finally makes draw bar move, circuit breaker trip.
The method of work of the electronic trip unit of the present invention, can guarantee that the safety of circuit, and relative to existing technologies, it makes to break
The defencive function of road device is gradually improved, and controls more flexible, operates easier.It is highly sensitive, and protection working range is big.
Below the present invention being described in detail, the above, only the preferred embodiments of the invention, when can not
Limit the scope of the present invention, the most all made impartial change and modification according to the application scope, all should still belong to covering scope of the present invention
In.
Claims (4)
1. a method of work for electronic trip unit, this electronic trip unit is compared by signal detection, signal, delay circuit, triggering
Circuit, power supply, voltage stabilizing, under-voltage time delay, triggering, executive component and transformer composition；It is characterized in that: Current Transformer is carried out
Signal detection, becomes the lowest output voltage to supply other links primary big current transformation, in the overload magnification scope of regulation
In, should be proportional between input current and the output voltage of transformer；After signal takes out, through bridge rectifier and capacitance-resistance
Filter circuit, is transformed into DC voltage, then through electric resistance partial pressure, input signal comparing element, with silicon voltage regulator diode or unijunction transistor
Realize signal to compare；When signal voltage exceedes the peak point voltage of the breakdown voltage of silicon voltage regulator diode or unijunction transistor, they are just
Conducting, and have signal to export；Start when triggering link after the trigger conducting triggered in circuit, electromagnetic release or electricity will be made
The armature adhesive of magnetic inductive electrical apparatus release, or make conductive current different because of polarity, weakens the magnetic flux of permanent magnet, allows on electrical apparatus release
Armature release, finally make draw bar move, circuit breaker trip, described delay circuit includes long delay and short time delay, instantaneous.
The method of work of electronic trip unit the most according to claim 1, it is characterised in that: described transformer uses senior cold
Roll the i.e. permalloy manufacture of fe-Ni soft magnetic alloy of stalloy or high magnetic conduction.
The method of work of electronic trip unit the most according to claim 1, it is characterised in that: described delay circuit is RC integration
Circuit, the delay time needed for borrowing the charging interval controlling capacitor to obtain；Triggering link uses Schmitt trigger to trigger
IGCT, is allowed to turn on；Delay circuit and trigger are powered by a mains transformer.
The method of work of electronic trip unit the most according to claim 1, it is characterised in that: for ensureing to occur short at main circuit
When road is so that voltage reduces, each link remains to normally work, have employed jumbo filter capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110278943.7A CN102354943B (en) | 2011-09-20 | 2011-09-20 | A kind of method of work of electronic trip unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110278943.7A CN102354943B (en) | 2011-09-20 | 2011-09-20 | A kind of method of work of electronic trip unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102354943A CN102354943A (en) | 2012-02-15 |
| CN102354943B true CN102354943B (en) | 2016-12-28 |
Family
ID=45578467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110278943.7A Expired - Fee Related CN102354943B (en) | 2011-09-20 | 2011-09-20 | A kind of method of work of electronic trip unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102354943B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106992493B (en) * | 2016-01-21 | 2019-08-16 | 上海复旦微电子集团股份有限公司 | A kind of overload protection detection circuit |
| CN106356805A (en) * | 2016-08-22 | 2017-01-25 | 陈宜中 | Method for endowing shortcircuit burning self-cut-off device with air switch hot stripping function |
| CN109950880A (en) * | 2019-03-23 | 2019-06-28 | 乐清拓优电气有限公司 | A kind of highly reliable Aftercurrent protecting equipment control circuit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2034745U (en) * | 1987-07-10 | 1989-03-22 | 何传文 | Current-limiting leakage protector |
| US4924342A (en) * | 1987-01-27 | 1990-05-08 | Teledyne Inet | Low voltage transient current limiting circuit |
| CN2153138Y (en) * | 1993-04-10 | 1994-01-12 | 余为骥 | Electromagnetic tripper |
| CN201846058U (en) * | 2010-09-29 | 2011-05-25 | 厦门振泰成科技有限公司 | Over-voltage/over-current protecting circuit |
-
2011
- 2011-09-20 CN CN201110278943.7A patent/CN102354943B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4924342A (en) * | 1987-01-27 | 1990-05-08 | Teledyne Inet | Low voltage transient current limiting circuit |
| CN2034745U (en) * | 1987-07-10 | 1989-03-22 | 何传文 | Current-limiting leakage protector |
| CN2153138Y (en) * | 1993-04-10 | 1994-01-12 | 余为骥 | Electromagnetic tripper |
| CN201846058U (en) * | 2010-09-29 | 2011-05-25 | 厦门振泰成科技有限公司 | Over-voltage/over-current protecting circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102354943A (en) | 2012-02-15 |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| C53 | Correction of patent for invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 528437 B building, No. 53 West Jiangling Road, torch hi tech Development Zone, Guangdong, Zhongshan Applicant after: GUANGDONG TECCO ELECTRIC CO., LTD. Address before: 528437 B building, No. 53 West Jiangling Road, torch hi tech Development Zone, Guangdong, Zhongshan Applicant before: Guangdong Tenfo Electrical Group Co., Ltd. |
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| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: GUANGDONG TIANFU ELECTRIC GROUP CO., LTD. TO: GUANGDONG TECCO ELECTRIC CO., LTD. |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161228 Termination date: 20180920 |
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| CF01 | Termination of patent right due to non-payment of annual fee |