CN1558246A - Transformer step down universal earth wire electrification detecting device for electric appliances - Google Patents
Transformer step down universal earth wire electrification detecting device for electric appliances Download PDFInfo
- Publication number
- CN1558246A CN1558246A CNA2004100017282A CN200410001728A CN1558246A CN 1558246 A CN1558246 A CN 1558246A CN A2004100017282 A CNA2004100017282 A CN A2004100017282A CN 200410001728 A CN200410001728 A CN 200410001728A CN 1558246 A CN1558246 A CN 1558246A
- Authority
- CN
- China
- Prior art keywords
- transformer
- ground wire
- earth wire
- ground line
- control circuit
- Prior art date
- 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.)
- Pending
Links
- 239000003990 capacitor Substances 0.000 abstract description 2
- 230000000087 stabilizing effect Effects 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Supply And Distribution Of Alternating Current (AREA)
Abstract
The present invention is one kind of transformer voltage lowered universal ground line charge detector, belongs to the field of electronic technology application and relates to the technology of detecting the potential difference between zero line and ground line. The present invention features that the transformer has its primary connected between the zero line and the ground line and the detector circuit consists of transformer, rectifying diodes, zener diode, voltage stabilizing capacitor and switching transistor, etc. connected together. The switching transistor outputs charged ground line signal. The present invention is used widely in the control circuit for electric appliance for cutting off power supply in case the ground is charged.
Description
Technical field the invention belongs to the application of electronic technology field, particularly the detection technique of potential difference (PD) between Zero-liue.
Background technology is well-known, and the ground connection that family expenses and similar applications electrical equipment produce in the device standard-required user family must be reliably, and the standard plug that the band ground wire also is housed in its product is for linking to each other good with assurance ground connection with ground wire in the socket.And poor in China and some regional power utilization environments of the world, the ground connection of many buildings is insecure, or even lack.In this case, qualified family expenses and the similar applications electrical equipment safety that can not guarantee the user.The invention provides ground wire and basic insulation to lose efficacy simultaneously or the ground wire electrification signal for family expenses and the similar applications electrical equipment that does not have the ground wire electrification signal supervisory instrument, makes signal source for the control circuit of various control modes and different electrical appliances.Before the invention applying date, family expenses and similar applications electrical equipment do not have above-mentioned signal source.Described family expenses of the invention and similar applications electrical equipment; be meant that especially needing 18 kinds of CCC authentication family expenses and similar applications electrical equipment is household electric refrigerator and food freezer; electric fan; air conditioner; motor-compressor; domestic electric washer; electric heater; household heater; Hoover; skin and hair-care utensil; electric iron; electromagnetic stove; electric oven; electric food processing apparatus; micro-wave oven; electric stove; baking oven and similar appliances; range hood; liquid heater and cold and hot water drinking machine and electric cooker etc. do not have ground connection and basic insulation and lost efficacy simultaneously; the electrical equipment that has anti-electric wall personal safety defencive function during ground wire electrification; and above-mentioned electrical equipment does not have above-mentioned functions before the invention applying date, is restricted for the range of application of family expenses and similar applications electrical equipment.Need at great majority that ground wire and basic insulation lost efficacy simultaneously, the occasion of personnel protection is provided during ground wire electrification, must add control.
The purpose of summary of the invention the invention provides a kind of ground wire and basic insulation lost efficacy simultaneously or the effective pick-up unit of ground wire electrification, provides signal source to family expenses that do not have above-mentioned detection device and similar applications electrical apparatus control circuit.
The invention solves the technical scheme that its technical matters adopts: the potential difference detecting device between the described Zero-liue of the invention is by the transformer step-down of cross-over connection between Zero-liue, diode rectification, electric capacity, stabilivolt and switching tube connect and compose step by step, export the ground wire electrification signal by switching tube to family expenses and similar applications electrical apparatus control circuit.
The advantage of the invention is: simple in structure, highly versatile, the various control circuits of suitable all kinds of family expenses and similar applications electrical equipment.
Appended drawings is the electrical schematic diagram of the invention.N is a zero line among the figure, E
INBe the ground wire end of incoming cables, T is a transformer, D
1～D
4Be commutation diode, DW is a stabilivolt, C
oBe electric capacity of voltage regulation, Q
oBe switching tube, the present embodiment model is 9013.
The primary coil cross-over connection of embodiment transformer T is in zero line N and ground wire E
INBetween, the secondary coil of transformer T connects the input end of diode bridge rectifier circuit, and the zero line-ground wire potential difference signal after the rectification passes through capacitor C
o, stabilivolt DW voltage stabilizing, connect switching tube Q
oBase stage.Its collector signal connects the control circuit of family expenses and similar applications electrical equipment.
Principle of work summary family expenses and similar applications electrical equipment ground connection and basic insulation lost efficacy simultaneously or the situation of ground wire electrification under, zero line N and ground wire E
INBetween voltage between 36V-220V, cross-over connection is in ground wire E
INProduce the 1.5-6V DC voltage with the transformer reduction voltage circuit on the zero line N by rectification circuit, make the switching tube conducting, to family expenses that are attached thereto and similar applications electrical apparatus control circuit output low level signal.
Claims (2)
1, a kind of electric appliance general earth wire charged testing device of transformer step-down, its principal character is to be connected to form step by step by transformer, commutation diode, electric capacity of voltage regulation, stabilivolt and switching tube, switching tube links to each other with electrical apparatus control circuit, to electrical apparatus control circuit output ground wire electrification signal.
2, the electric appliance general earth wire charged testing device of transformer step-down according to claim 1, the elementary two ends cross-over connection that it is characterized in that transformer is between the ground wire and zero line of power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100017282A CN1558246A (en) | 2004-01-19 | 2004-01-19 | Transformer step down universal earth wire electrification detecting device for electric appliances |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100017282A CN1558246A (en) | 2004-01-19 | 2004-01-19 | Transformer step down universal earth wire electrification detecting device for electric appliances |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1558246A true CN1558246A (en) | 2004-12-29 |
Family
ID=34350634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2004100017282A Pending CN1558246A (en) | 2004-01-19 | 2004-01-19 | Transformer step down universal earth wire electrification detecting device for electric appliances |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1558246A (en) |
-
2004
- 2004-01-19 CN CNA2004100017282A patent/CN1558246A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |