CN202145223U - Electric device working state indicating circuit - Google Patents
Electric device working state indicating circuit Download PDFInfo
- Publication number
- CN202145223U CN202145223U CN201120198955U CN201120198955U CN202145223U CN 202145223 U CN202145223 U CN 202145223U CN 201120198955 U CN201120198955 U CN 201120198955U CN 201120198955 U CN201120198955 U CN 201120198955U CN 202145223 U CN202145223 U CN 202145223U
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- China
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- terminal
- light emitting
- emitting diode
- electrical appliance
- indicating circuit
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Abstract
The utility model relates to an electric device working state indicating circuit used for detecting and indicating the working or fault state of long-term operated electric devices. The indicating circuit comprises a power utilization electric appliance Z which is connected between the first terminal and the second terminal of a power supply input end, wherein the power utilization electric appliance Z is connected with the second terminal via a divider resistor R2 serially connected with the power utilization electric appliance Z. A light emitting diode D1, a detecting resistor R1 and a button switch A, which are sequentially connected in serial, are also arranged between the first terminal and the second terminal, wherein the output end of the light emitting diode D1 is connected to the contact between the divider resistor and the power utilization electric appliance via the serially connected diode D and resistor R. The indicating circuit of the utility model can indicate the operating or fault state of an electric device and make a judgment about the quality of the open circuit fault or short circuit fault.
Description
Technical field
The utility model relates to the electric equipment duty indicating circuit that a kind of work or malfunction that is used for to long playing electrical appliance detects and indicate.
Background technology
In electrical appliance (like well heater in some power equipments etc.) course of work of some running statuses that keep for a long time switching on; The staff need understand electrical equipment at any time and whether be in normal operating conditions; Normally in the equipment loop, draw a less dividing potential drop; Again the parallel connection light emitting diode as pilot lamp, the indicating equipment duty.Bright, the dark variation of light emitting diode can only reflect whether electrical appliance breaks down in the sort circuit course of work, but can't judge further that electrical appliance is open fault or short trouble, thereby further maintenance is come inconvenience again.
Summary of the invention
The utility model technical matters to be solved is, providing a kind of can show electric operation and malfunction, and the electric equipment duty indicating circuit that can judge the character of open fault or short trouble.
The electric equipment duty indicating circuit of the utility model includes the first terminal that is connected power input and the electrical appliance Z between second terminal; Electrical appliance Z is connected with second terminal through a divider resistance R2 who connects with it; Between said second terminal and the first terminal, also be provided with light emitting diode D1, detection resistance R 1 and the pushbutton switch A of series connection successively, the output terminal of said light emitting diode D1 is connected to the contact between divider resistance and the electrical appliance through diode in series D and resistance R.
In the utility model course of work, light emitting diode luminous work simultaneously when electrical appliance moves, the indication electrical appliance is in normal operating conditions; When electrical appliance broke down, light emitting diode was not luminous, and indication fault takes place; When fault takes place, press the button switch, if lumination of light emitting diode can judge that electrical appliance is an open fault, can not judge then that as light emitting diode is luminous electrical appliance is a short trouble, thereby can be follow-up maintenance foundation is provided.
Description of drawings
Fig. 1 is the circuit diagram of the utility model.
Embodiment
As shown in the figure; This circuit includes the first terminal 1 that is connected power input and the electrical appliance Z between second terminal 2; Electrical appliance Z is connected with second terminal through a divider resistance R2 who connects with it; Between said second terminal and the first terminal, also be provided with light emitting diode D1, detection resistance R 1 and the pushbutton switch A of series connection successively, the output terminal of said light emitting diode D1 is connected to the contact 3 between divider resistance and the electrical appliance through diode in series D and resistance R.
The principle of work of the utility model is:
When electrical appliance Z is in running order, there is a dividing potential drop to exist at R2, this dividing potential drop makes parallelly connected superincumbent R, D, D1 circuit working, and light emitting diode D1 is luminous; When Z is in off position, on R2, there is not dividing potential drop, parallelly connected superincumbent R, D, D1 circuit are not worked, light emitting diode is not luminous.At this moment, press the A switch, can judge directly which kind of malfunction electric equipment is in, that is: when light emitting diode is not luminous, press the A button, light emitting diode is not luminous yet, proves the electrical appliance short trouble; When light emitting diode is not luminous, press the A button, lumination of light emitting diode proves the electrical appliance open circuit.
D is an isolating diode, has confirmed that the power supply of this circuit is introduced and must be met the requirements, when the electrical appliance short circuit; R2 damages, and power supply is walked from R, D, D1, will directly damage light emitting diode; Therefore at this moment press the inspection of A button; Luminotron is not luminous yet, tells the maintainer that electric equipment damages, and is in short-circuit condition.When electric equipment was opened a way, R2 can not damage, and pressed the inspection of A button, and luminotron is luminous, told aging open circuit of maintainer's electric equipment to damage.
If there is not isolating diode D, this circuit will can not worked.Because R2 is a divider resistance, resistance is very little, and when pressing the button switch A, R2 and R1 will directly form the loop, has absorbed the whole voltages above the light emitting diode D1, and light emitting diode can be not luminous.
Claims (1)
1. electric equipment duty indicating circuit; Include the first terminal that is connected power input and the electrical appliance Z between second terminal; It is characterized in that: electrical appliance Z is connected with second terminal through a divider resistance R2 who connects with it; Between said second terminal and the first terminal, also be provided with light emitting diode D1, detection resistance R 1 and the pushbutton switch A of series connection successively, the output terminal of said light emitting diode D1 is connected to the contact between divider resistance and the electrical appliance through diode in series D and resistance R.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120198955U CN202145223U (en) | 2011-06-14 | 2011-06-14 | Electric device working state indicating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120198955U CN202145223U (en) | 2011-06-14 | 2011-06-14 | Electric device working state indicating circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202145223U true CN202145223U (en) | 2012-02-15 |
Family
ID=45581154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120198955U Expired - Lifetime CN202145223U (en) | 2011-06-14 | 2011-06-14 | Electric device working state indicating circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202145223U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721888A (en) * | 2012-07-02 | 2012-10-10 | 镇江电研华源电力技术有限公司 | Failure indication circuit of high-power heating system |
| CN105785266A (en) * | 2016-05-31 | 2016-07-20 | 中国工程物理研究院流体物理研究所 | Serial semiconductor switch short-circuit fault indicating circuit |
-
2011
- 2011-06-14 CN CN201120198955U patent/CN202145223U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721888A (en) * | 2012-07-02 | 2012-10-10 | 镇江电研华源电力技术有限公司 | Failure indication circuit of high-power heating system |
| CN105785266A (en) * | 2016-05-31 | 2016-07-20 | 中国工程物理研究院流体物理研究所 | Serial semiconductor switch short-circuit fault indicating circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120215 |
|
| CX01 | Expiry of patent term |