CN207234751U - A kind of trigger circuit for breaker - Google Patents
A kind of trigger circuit for breaker Download PDFInfo
- Publication number
- CN207234751U CN207234751U CN201720913803.5U CN201720913803U CN207234751U CN 207234751 U CN207234751 U CN 207234751U CN 201720913803 U CN201720913803 U CN 201720913803U CN 207234751 U CN207234751 U CN 207234751U
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- Prior art keywords
- trigger
- light
- coupled isolation
- resistance
- isolation chip
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- 238000002955 isolation Methods 0.000 claims abstract description 40
- 239000003990 capacitor Substances 0.000 claims abstract description 13
- 230000035484 reaction time Effects 0.000 abstract 1
- 230000009471 action Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The utility model discloses a kind of trigger circuit for breaker, including speed-up capacitor circuit, light-coupled isolation chip and trigger circuit, wherein, trigger voltage signal triggers light-coupled isolation chip by speed-up capacitor circuit, and light-coupled isolation chip sends trigger signal by trigger circuit.The utility model is not only effectively reduced Time delay, the triggering reaction time is shortened to about 100nS, and acceptable trigger voltage scope is wider, and the trigger voltage in the utility model can reach DC30V~DC300V.
Description
Technical field
It the utility model is related to a kind of trigger circuit, more particularly to a kind of trigger circuit for breaker.
Background technology
Breaker operation mechanism action voltage test technology is one of important leverage of safe operation of power system, it is acted
The trigger circuit design of voltage is most important, and at present both at home and abroad, common trigger circuit is all the circuit for not including speed-up capacitor.
Trigger circuit structure figure of the prior art, as shown in Figure 1, including light-coupled isolation chip 1 and trigger circuit 2, is touched
Hair voltage signal passes through resistance R1, draw subsequently into the second pin of light-coupled isolation chip, and from the 3rd of light-coupled isolation chip the
Foot is formed into a loop.The 6th pin of light-coupled isolation chip is because pull-up resistor R under normal circumstances2And high level is exported, it is tactile when having
When sending out voltage signal, which is changed into low level, this signal is trigger signal.
The shortcomings that this trigger circuit, is, due to the limitation of PCB package dimensions, existing resistance R1Power selection 2W, in order to
Trigger circuit is set to be worked normally under DC300V trigger voltages, resistance R1Resistance value have to be larger than R=U2/ P=3002/ 2=45K
Ω, common light-coupled isolation chip typical case conducting electric current is 2mA~15mA, in order to work normally light-coupled isolation chip, so most
Low current is 2mA, so that minimum trigger voltage only has U=IR=90V.
The trigger voltage narrow range of universal trigger circuit on the market in summary, has been unsatisfactory for low disconnected of some operation voltages
The requirement of road device low-voltage motion test.
Utility model content
Purpose of utility model：The utility model is in view of the problems of the existing technology, there is provided a kind of reaction speed is fast, touches
Send out the wide trigger circuit for breaker of voltage range.
Technical solution：The utility model provides a kind of trigger circuit for breaker, including speed-up capacitor circuit, light
Coupling isolating chip and trigger circuit, wherein, trigger voltage signal by speed-up capacitor circuit trigger light-coupled isolation chip, optocoupler every
Off-chip piece sends trigger signal by trigger circuit；The speed-up capacitor circuit includes 3rd resistor R3, the 4th resistance R4, first
Capacitance C1With diode D1, wherein, 3rd resistor R3One end respectively with trigger voltage and the 4th resistance R4One end connection, the
Three resistance R3The other end and the first capacitance C1One end connection, the first capacitance C1The other end respectively with the 4th resistance R4, two poles
Pipe D1Anode connected with the second pin of light-coupled isolation chip, diode D1Cathode respectively with light-coupled isolation chip the 3rd
Pin, trigger voltage are connected with ground.
Further, the 3rd resistor R3For 5.1K Ω, the 4th resistance R4For 27K Ω, second resistance R2For 1K Ω.So
Light-coupled isolation chip can be effectively protected, while trigger voltage is reached DC30V~DC300V, ensures trigger circuit
Normal work.
Further, the first capacitance C1Capacitance be 0.1uF.Effectively subtract while guaranteeing and normally producing trigger signal
The small volume of whole trigger circuit.
Further, the diode D1Model 1N4148.Diode D1 is reverse protection diode, using this type
Number diode, when trigger voltage is reversed, preferably light-coupled isolation chip can be protected not to be damaged.
Further, the model 6N137 of the light-coupled isolation chip.Light-coupled isolation chip 6N137 is high speed photo coupling, conversion
Delay representative value was less than for 30 nanoseconds, advantageously reduced the Time delay time.
Beneficial effect：Compared with prior art, the utility model is not only effectively reduced Time delay, reacts triggering
Time shortens to about 100nS, and acceptable trigger voltage scope is wider, and the trigger voltage in the utility model can
Reach DC30V~DC300V；Meanwhile effectively reduce the volume of whole trigger circuit.
Brief description of the drawings
Fig. 1 is the trigger circuit used in the prior art；
Fig. 2 is the circuit diagram of trigger circuit provided by the utility model.
Embodiment
Further explanation is done to the utility model below in conjunction with the accompanying drawings.
As shown in Fig. 2, the utility model discloses a kind of trigger circuit for breaker, including speed-up capacitor circuit 3,
Light-coupled isolation chip 1 and trigger circuit 2, wherein, trigger voltage signal triggers light-coupled isolation chip 1 by speed-up capacitor circuit 3,
Light-coupled isolation chip 1 sends trigger signal by trigger circuit 2.
Wherein, speed-up capacitor circuit 3 includes 3rd resistor R3, the 4th resistance R4, the first capacitance C1With diode D1, the 3rd
Resistance R3One end respectively with trigger voltage and the 4th resistance R4One end connection, 3rd resistor R3The other end and the first capacitance
C1One end connection, the first capacitance C1The other end respectively with the 4th resistance R4, diode D1Anode and light-coupled isolation chip
Second pin connects, diode D1Cathode be connected respectively with the 3rd pin, trigger voltage and the ground of light-coupled isolation chip.Triggering
Circuit 2 includes second resistance R2, second resistance R2One end and light-coupled isolation chip the 6th pin connect, second resistance R2's
The power supply connection of the other end and the 7th pin of light-coupled isolation chip, the 8th pin and 3.3V.The 6th of light-coupled isolation chip draws
Foot is trigger signal output terminal, and the 5th pin of light-coupled isolation chip is grounded.
In the present embodiment, 3rd resistor R3For 5.1K Ω, the 4th resistance R4For 27K Ω, second resistance R2For 1K Ω；The
The capacitance of one capacitance C1 and the first capacitance C1 are all 0.1uF；Diode D1Model 1N4148；The model of light-coupled isolation chip
For 6N137.Wherein, the pin function of light-coupled isolation chip 6N137 is as shown in table 1.
Table 1
| Pin | Function |
| Pin 1 | It is not connected to |
| Pin 2 | Diode anode |
| Pin 3 | Diode cathode |
| Pin 4 | It is not connected to |
| Pin 5 | Ground |
| Pin 6 | Output terminal |
| Pin 7 | Output is enabled |
| Pin 8 | Power supply is not connected to |
Trigger voltage signal passes through 3rd resistor R3, the 4th resistance R4With the first capacitance C1, subsequently into light-coupled isolation chip
Second pin, and be formed into a loop from the 3rd pin of light-coupled isolation chip.The 7th pin of light-coupled isolation chip and the 8th pin
Parallel connection, the 6th pin of light-coupled isolation chip is because pull-up resistor, i.e. second resistance R under normal circumstances2And high level is exported, when
When having trigger voltage signal, the 6th pin is changed into low level, this signal is trigger signal.
The breaker of general DC110V operation voltages, since the operation voltage of low pressure action voltage test is specified action electricity
The 30% of pressure, so the voltage of its low pressure motion test is DC30V.The trigger voltage of DC30V in order to balance, designs speed-up capacitor
Circuit, 3rd resistor R3Resistance value be 5.1K Ω, when trigger voltage occur in a flash, the first capacitance C1Equivalent to short circuit, at this time
Trigger current is 30V/5.1K=6mA, and the conducting of light-coupled isolation chip is met so as to moment.As the first capacitance C1Charging is full
With it is rear, branch current cut-off, voltage signal passes through the 4th resistance R4It is loaded into light-coupled isolation chip, ensures whole in triggering
During light-coupled isolation chip be in conducting state.
The above is only the preferred embodiment of the utility model, it should be pointed out that：For the common skill of the art
For art personnel, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these improve and
Retouching also should be regarded as the scope of protection of the utility model.
Claims (5)
- A kind of 1. trigger circuit for breaker, it is characterised in that：Including speed-up capacitor circuit, light-coupled isolation chip and triggering Circuit, wherein, trigger voltage signal triggers light-coupled isolation chip by speed-up capacitor circuit, and light-coupled isolation chip is by triggering back Road sends trigger signal；The speed-up capacitor circuit includes 3rd resistor R3, the 4th resistance R4, the first capacitance C1With diode D1, Wherein, 3rd resistor R3One end respectively with trigger voltage and the 4th resistance R4One end connection, 3rd resistor R3The other end with First capacitance C1One end connection, the first capacitance C1The other end respectively with the 4th resistance R4, diode D1Anode and optocoupler every The second pin connection of off-chip piece, diode D1Cathode the 3rd pin, trigger voltage and the ground with light-coupled isolation chip respectively Connection.
- 2. the trigger circuit according to claim 1 for breaker, it is characterised in that：The trigger circuit includes second Resistance R2, second resistance R2One end and light-coupled isolation chip the 6th pin connect, second resistance R2The other end and optocoupler every The 7th pin, the 8th pin of off-chip piece are connected with the power supply of 3.3V, the 3rd resistor R3For 5.1K Ω, the 4th resistance R4For 27K Ω, second resistance R2For 1K Ω.
- 3. the trigger circuit according to claim 1 for breaker, it is characterised in that：First capacitance C1Capacitance be 0.1uF。
- 4. the trigger circuit according to claim 1 for breaker, it is characterised in that：The diode D1Model 1N4148。
- 5. the trigger circuit according to claim 1 for breaker, it is characterised in that：The type of the light-coupled isolation chip Number it is 6N137.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720913803.5U CN207234751U (en) | 2017-07-26 | 2017-07-26 | A kind of trigger circuit for breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720913803.5U CN207234751U (en) | 2017-07-26 | 2017-07-26 | A kind of trigger circuit for breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207234751U true CN207234751U (en) | 2018-04-13 |
Family
ID=61854893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720913803.5U Active CN207234751U (en) | 2017-07-26 | 2017-07-26 | A kind of trigger circuit for breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207234751U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108736872A (en) * | 2018-04-26 | 2018-11-02 | 西安微电子技术研究所 | A kind of ignition drive circuit |
| CN109556871A (en) * | 2018-12-13 | 2019-04-02 | 西安航天动力研究所 | A kind of liquid-propellant rocket engine Timing Signal detection system and method |
-
2017
- 2017-07-26 CN CN201720913803.5U patent/CN207234751U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108736872A (en) * | 2018-04-26 | 2018-11-02 | 西安微电子技术研究所 | A kind of ignition drive circuit |
| CN109556871A (en) * | 2018-12-13 | 2019-04-02 | 西安航天动力研究所 | A kind of liquid-propellant rocket engine Timing Signal detection system and method |
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