CN203054659U - Special constant current source for testing of residual currents - Google Patents
Special constant current source for testing of residual currents Download PDFInfo
- Publication number
- CN203054659U CN203054659U CN 201320031767 CN201320031767U CN203054659U CN 203054659 U CN203054659 U CN 203054659U CN 201320031767 CN201320031767 CN 201320031767 CN 201320031767 U CN201320031767 U CN 201320031767U CN 203054659 U CN203054659 U CN 203054659U
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- current source
- arm controller
- special constant
- current
- constant current
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Abstract
The utility model provides a special constant current source for testing of residual currents. The special constant current source comprises an ARM controller, a stabilized voltage supply, a sine wave amplitude regulating circuit, a feedback amplification circuit and a current sampling circuit. The stabilized voltage supply is connected with both the ARM controller and the feedback amplification circuit. An output end of the ARM controller outputs constant currents after passing through the sine wave amplitude regulating circuit and the feedback amplification circuit. The current sampling circuit is connected with an output end of the feedback amplification circuit and used for collecting the constant currents and then outputting the constant currents to the ARM controller. According to the special constant current source for the testing of the residual currents, wave form amplitudes are synthesized in a digital mode, and therefore the special constant current source is not affected by external voltage, and the stability is good; due to the fact that the velocity is adjusted in a digital mode, the special constant current source is not affected by operators and is good in consistency; and since gears shift automatically, the special constant current source is simple to operate.
Description
Technical field
The utility model belongs to low-voltage electrical apparatus isolating switch detection range, is specifically related to a kind of residual current test special constant-current source.
Background technology
In occasions such as low-voltage electrical apparatus factory, electrical equipment measuring station, technology for detection mechanism, Subscriber Unit check, examinations, the residual current action breaker tester is the instrumentation that detects residual current action breaker reliability indispensability.At present, main method for detection of the residual current action breaker reliability is to adopt the method described in Fig. 1, be that alternating current 220V exports product to then through variable resistor, reometer, this traditional method output current is subject to the external voltage influence of fluctuations, degree of regulation is influenced by adjustable impedance, and the step rate consistance is poor.
The utility model content
The utility model provides a kind of residual current test special constant-current source at above-mentioned the deficiencies in the prior art, and this residual current test special constant-current source precision height, electric current are not subjected to external voltage fluctuation interference, stepping is adjustable, high conformity.
The utility model is achieved by the following technical solution:
A kind of residual current test special constant-current source comprises ARM controller, stabilized voltage supply, sinusoidal wave amplitude regulating circuit, feedback amplifier and current sampling circuit; Stabilized voltage supply all links to each other with feedback amplifier with the ARM controller, the output terminal of ARM controller is exported continuous current behind sinusoidal wave amplitude regulating circuit and feedback amplifier, current sampling circuit links to each other with the output terminal of feedback amplifier, exports the ARM controller to after being used for gathering described continuous current.
Further, described residual current test special constant-current source also comprises a RS485 telecommunication circuit, and described RS485 telecommunication circuit links to each other with the ARM controller.
Further, described residual current test special constant-current source also comprises a touch screen circuitry, and described touch screen circuitry links to each other with the ARM controller.
The utility model is compared with traditional constant current source, has following beneficial effect:
1, the general easy external voltage influence of fluctuations that is subjected to of traditional constant current source, degree of stability is poor; And wave-shape amplitude of the present utility model adopts numeral synthetic, not influenced by external voltage, and degree of stability is good;
2, traditional constant current source is regulated electric current by adjustable impedance, and consistance is relevant with operating personnel, and different personnel's consistance are poor; And speed employing of the present utility model is digital regulated, not influenced by the operative employee, high conformity;
3, the gear of traditional constant current source needs manual adjustments, and electric current is regulated needs manual adjustments adjustable impedance, test action time to need manually to switch earlier timer, complex operation; And the utility model adopts the touch-screen input, and gear automaticallyes switch, and operates simple and easy.
Description of drawings
The use view of Fig. 1 tradition constant current source;
Fig. 2 is the structured flowchart in residual current test special constant-current described in the utility model source;
Fig. 3 is the use view in residual current test special constant-current source.
Embodiment
The utility model is described in more detail below in conjunction with the drawings and specific embodiments.
As shown in Figure 2, the utility model provides a kind of residual current test special constant-current source, comprises ARM controller, stabilized voltage supply, sinusoidal wave amplitude regulating circuit, feedback amplifier and current sampling circuit; Stabilized voltage supply all links to each other with feedback amplifier with the ARM controller, the output terminal of ARM controller is exported continuous current behind sinusoidal wave amplitude regulating circuit and feedback amplifier, current sampling circuit links to each other with the output terminal of feedback amplifier, exports the ARM controller to after being used for gathering described continuous current.In order to communicate with outer computer etc., described residual current test special constant-current source also comprises a RS485 telecommunication circuit, and described RS485 telecommunication circuit links to each other with the ARM controller.For the ease of input of control commands, described residual current test special constant-current source also comprises a touch screen circuitry, and described touch screen circuitry links to each other with the ARM controller.
As shown in Figure 3, residual current test special constant-current source M described in the utility model directly links to each other with tested CBR in use, and it adopts the digitizing regulative mode, outputting current steadily, degree of regulation height, step rate high conformity.
The utility model not only is confined to above-mentioned embodiment; persons skilled in the art are according to the disclosed content of the utility model; can adopt other multiple embodiment to implement the utility model; therefore; every employing project organization of the present utility model and thinking; do some simple designs that change or change, all fall into the scope of the utility model protection.
Claims (3)
1. a residual current test special constant-current source is characterized in that, comprises ARM controller, stabilized voltage supply, sinusoidal wave amplitude regulating circuit, feedback amplifier and current sampling circuit; Stabilized voltage supply all links to each other with feedback amplifier with the ARM controller, the output terminal of ARM controller is exported continuous current behind sinusoidal wave amplitude regulating circuit and feedback amplifier, current sampling circuit links to each other with the output terminal of feedback amplifier, exports the ARM controller to after being used for gathering described continuous current.
2. residual current according to claim 1 is tested the special constant-current source, it is characterized in that, described residual current test special constant-current source also comprises a RS485 telecommunication circuit, and described RS485 telecommunication circuit links to each other with the ARM controller.
3. residual current according to claim 1 is tested the special constant-current source, it is characterized in that, described residual current test special constant-current source also comprises a touch screen circuitry, and described touch screen circuitry links to each other with the ARM controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320031767 CN203054659U (en) | 2013-01-21 | 2013-01-21 | Special constant current source for testing of residual currents |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320031767 CN203054659U (en) | 2013-01-21 | 2013-01-21 | Special constant current source for testing of residual currents |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203054659U true CN203054659U (en) | 2013-07-10 |
Family
ID=48737591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320031767 Expired - Fee Related CN203054659U (en) | 2013-01-21 | 2013-01-21 | Special constant current source for testing of residual currents |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203054659U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104898050A (en) * | 2015-06-16 | 2015-09-09 | 上海电器科学研究所（集团）有限公司 | Multi-output power supply for residual current protective breaker testing device |
| CN106125813A (en) * | 2016-08-01 | 2016-11-16 | 河北大学 | A kind of high stability constant-current source of portable wide amount limit |
| CN106443437A (en) * | 2016-11-16 | 2017-02-22 | 浙江方圆电气设备检测有限公司 | A residual current adjusting device |
-
2013
- 2013-01-21 CN CN 201320031767 patent/CN203054659U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104898050A (en) * | 2015-06-16 | 2015-09-09 | 上海电器科学研究所（集团）有限公司 | Multi-output power supply for residual current protective breaker testing device |
| CN104898050B (en) * | 2015-06-16 | 2018-06-08 | 上海电器科学研究所（集团）有限公司 | A kind of multi-output power supply for Aftercurrent protection circuit breaker test device |
| CN106125813A (en) * | 2016-08-01 | 2016-11-16 | 河北大学 | A kind of high stability constant-current source of portable wide amount limit |
| CN106443437A (en) * | 2016-11-16 | 2017-02-22 | 浙江方圆电气设备检测有限公司 | A residual current adjusting device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20130710 Termination date: 20210121 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |