CN206178020U - Three phase voltage sampling circuit - Google Patents
Three phase voltage sampling circuit Download PDFInfo
- Publication number
- CN206178020U CN206178020U CN201621240968.2U CN201621240968U CN206178020U CN 206178020 U CN206178020 U CN 206178020U CN 201621240968 U CN201621240968 U CN 201621240968U CN 206178020 U CN206178020 U CN 206178020U
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- China
- Prior art keywords
- power supply
- circuit
- electronic switch
- supply unit
- rectifier circuit
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- 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.)
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Abstract
The utility model relates to a three phase voltage sampling circuit, including transformer, rectifier circuit, sampling circuit, electronic switch, power supply unit, power supply electric capacity, the transformer is connected with rectifier circuit, and rectifier circuit and sampling circuit are connected, and rectifier circuit and electronic switch are connected, electronic switch and power supply unit and power supply capacitance connection. The utility model discloses a set up electronic switch between rectifier circuit and the power supply unit, a parallelly connected power supply electric capacity simultaneously when gathering voltage signal, can cut off the circuit of rectifier circuit between to the power supply unit through electronic switch, supplies power to the circuit with power supply electric capacity, and rectifier circuit only is connected with sampling circuit, the voltage of sampling circuit after can accurate collection rectification, improvement voltage acquisition's accuracy.
Description
Technical field
The utility model is related to a kind of three-phase voltage sample circuit for residual current action breaker.
Background technology
The voltage sampling circuit and power supply circuit of existing residual current action breaker are the rectified currents with transformer
Road connection, the voltage after rectification will simultaneously supply sample circuit and power supply circuit, because power supply circuit point has gone a part
Voltage, causes the voltage degree of accuracy of sample circuit not high, influences the accuracy of Acquisition Circuit.
The content of the invention
For these reasons, the purpose of this utility model is to provide one kind in the more accurate three-phase of collection voltages signal
Voltage sample circuit.
To achieve the above object, the utility model uses a kind of three-phase voltage sample circuit, including transformer, rectified current
Road, sample circuit, electronic switch, power supply unit, power supply capacitor, transformer are connected with rectification circuit, and rectification circuit is electric with sampling
Road connects, and rectification circuit is connected with electronic switch, and electronic switch is connected with power supply unit and power supply capacitor.
The utility model is further arranged between the rectification circuit and electronic switch be connected by diode, the electricity
Connected by diode between sub switch and power supply unit and power supply capacitor.
The beneficial effects of the utility model are that electronic switch is set between rectification circuit and power supply unit, while in parallel one
Power supply capacitor, in collection voltages signal, can cut off rectification circuit to the circuit between power supply unit, with confession by electronic switch
Electric capacitance on circuit is powered, and rectification circuit is only connected with sample circuit, the voltage after sample circuit energy precise acquisition rectification, is improved
The accuracy of voltage acquisition.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of the utility model embodiment.
Specific embodiment
It is as shown in figure 1, specific embodiment of the utility model is a kind of three-phase voltage sample circuit including transformer, whole
Current circuit, sample circuit, electronic switch, power supply unit, power supply capacitor, transformer are connected with rectification circuit, rectification circuit with adopt
Sample circuit is connected, and rectification circuit is connected with electronic switch, and electronic switch is connected with power supply unit and power supply capacitor, rectification circuit with
Connected by diode between electronic switch, connected by diode between electronic switch and power supply unit and power supply capacitor.
Claims (2)
1. a kind of three-phase voltage sample circuit, it is characterised in that：The three-phase voltage sample circuit includes transformer, rectified current
Road, sample circuit, electronic switch, power supply unit, power supply capacitor, transformer are connected with rectification circuit, and rectification circuit is electric with sampling
Road connects, and rectification circuit is connected with electronic switch, and electronic switch is connected with power supply unit and power supply capacitor.
2. three-phase voltage sample circuit according to claim 1, it is characterised in that：The rectification circuit and electronic switch it
Between by diode connect, between the electronic switch and power supply unit and power supply capacitor by diode connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621240968.2U CN206178020U (en) | 2016-11-17 | 2016-11-17 | Three phase voltage sampling circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621240968.2U CN206178020U (en) | 2016-11-17 | 2016-11-17 | Three phase voltage sampling circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206178020U true CN206178020U (en) | 2017-05-17 |
Family
ID=58686128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621240968.2U Active CN206178020U (en) | 2016-11-17 | 2016-11-17 | Three phase voltage sampling circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206178020U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107422179A (en) * | 2017-09-08 | 2017-12-01 | 威胜电气有限公司 | New power supply sample circuit, the power supply method of sampling and its low-voltage circuit breaker |
-
2016
- 2016-11-17 CN CN201621240968.2U patent/CN206178020U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107422179A (en) * | 2017-09-08 | 2017-12-01 | 威胜电气有限公司 | New power supply sample circuit, the power supply method of sampling and its low-voltage circuit breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |