CN206992675U - Earth leakage protective device - Google Patents
Earth leakage protective device Download PDFInfo
- Publication number
- CN206992675U CN206992675U CN201720363642.7U CN201720363642U CN206992675U CN 206992675 U CN206992675 U CN 206992675U CN 201720363642 U CN201720363642 U CN 201720363642U CN 206992675 U CN206992675 U CN 206992675U
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- Prior art keywords
- electric capacity
- high withstand
- withstand voltage
- inductance
- resistance
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Abstract
The utility model provides a kind of earth leakage protective device,Including voltage input end,Leakage protection circuit,Voltage output end and frequency modulator,The leakage protection circuit includes piezo-resistance RV,First inductance L1,Second inductance L2,First high withstand voltage electric capacity CX1,Second high withstand voltage electric capacity CX2,Resistance R1 and fuse FU,Wherein,The voltage input end,The first inductance L1,The first high withstand voltage electric capacity CX1,Second high withstand voltage electric capacity CX2,The second inductance L2 and piezo-resistance RV are sequentially connected in series,The other end is grounded between the first high withstand voltage electric capacity CX1 and the second high withstand voltage electric capacity CX2 is accessed in described resistance R1 one end,The fuse FU is connected with the voltage output end and is arranged in parallel with the first high withstand voltage electric capacity CX1 and the second high withstand voltage electric capacity CX2.Earth leakage protective device provided by the utility model can provide electric shock phase buffer for electric shock human body, the electric leakage accident for preventing human electric shock and dying.
Description
Technical field
It the utility model is related to electric leakage protection technology field, more particularly to a kind of earth leakage protective device.
Background technology
Earth leakage protective of the zero-sequenceprotection as circuit is used in old-fashioned circuit, prevents the fire caused by circuit leaks electricity
Etc. accident, but because the protection seting value of zero-sequenceprotection is more than three phase unbalance current, harmonic current and normal leakage electricity
Flow valuve sum, so the electric leakage accident occurred because of human electric shock can not be protected.
Traditional leakage protection circuit, the electricity frequency that leaks electricity increase and increased with power, and electric leakage is corresponding sensitive, and malfunction is frequent,
Do not play current-limiting protection effect directly not only, and volume is big, inconvenience is safeguarded.
Solved the above problems therefore, it is necessary to provide a kind of new earth leakage protective device.
Utility model content
The technical problem that the utility model solves is to provide a kind of earth leakage protective device, can provide electric shock for electric shock human body
Phase buffer, the electric leakage accident for preventing human electric shock and dying.
In order to solve the above technical problems, the utility model provides a kind of earth leakage protective device, including voltage input end, electric leakage
Protection circuit, voltage output end and frequency modulator, the voltage input end are connected with external power source, the voltage output end and institute
Frequency modulator connection is stated, the frequency modulator connects external electric equipment, and the leakage protection circuit includes piezo-resistance RV, the first electricity
Feel L1, the second inductance L2, the first high withstand voltage electric capacity CX1, the second high withstand voltage electric capacity CX2, resistance R1 and fuse FU, wherein,
The voltage input end, the first inductance L1, the first high withstand voltage electric capacity CX1, the second high withstand voltage electric capacity CX2, described
Two inductance L2 and piezo-resistance RV are sequentially connected in series, and the first high withstand voltage electric capacity CX1 and described the are accessed in described resistance R1 one end
The other end is grounded between two high withstand voltage electric capacity CX2, and the fuse FU is connected with the voltage output end and with described first
High withstand voltage electric capacity CX1 and the second high withstand voltage electric capacity CX2 are arranged in parallel.
As a kind of improvement of the present utility model, the quantity of the fuse FU is three.
As a kind of improvement of the present utility model, the fuse FU is copper sheet.
As a kind of improvement of the present utility model, the external power source is three-phase alternating-current supply.
As a kind of improvement of the present utility model, the first inductance L1 and the second inductance L2 inductance value scope
It is 0.1~330 μ H.
Compared with correlation technique, earth leakage protective device provided by the utility model has the advantages that：
1) it is bigger by electric current using aobvious frequency principle, it can more be offset to 50Hz, determine power consumption loss；
2) electric current declines in gradual change type, drops to 10mA by 30mA；
3) adjustable earth leakage protective watt level；
4) about 2s electric shock buffer time can be provided for the people to get an electric shock.
Brief description of the drawings
, below will be to needed for embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
The accompanying drawing to be used is briefly described, and drawings in the following description are only some embodiments of the utility model, for this
For the those of ordinary skill of field, on the premise of not paying creative work, it can also be obtained according to these accompanying drawings other
Accompanying drawing, wherein：
Fig. 1 is leakage protection circuit provided by the utility model and external power source and the attachment structure frame of external electric equipment
Figure；
Fig. 2 is the circuit diagram of the leakage protection circuit shown in Fig. 1.
Embodiment
The technical scheme in the embodiment of the utility model will be clearly and completely described below, it is clear that described
Embodiment is only part of the embodiment of the present utility model, rather than whole embodiments.Based on the implementation in the utility model
Example, all other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, is belonged to
The scope of the utility model protection.
Referring to Fig. 1, Fig. 1 is leakage protection circuit provided by the utility model and external power source and external electric equipment
Connection block diagram.The utility model provides a kind of earth leakage protective device 1, including voltage input end 10, leakage protection circuit
11st, voltage output end 12 and frequency modulator 13, the voltage input end 10 are connected with external power source 2, the voltage output end 12
With the frequency modulator 13, the frequency modulator 13 is connected with external electric equipment 3.
Fig. 2 is please referred to, Fig. 2 is the circuit diagram of the leakage protection circuit shown in Fig. 1.The leakage protection circuit 11 wraps
Include piezo-resistance RV, the first inductance L1, the second inductance L2, the first high withstand voltage electric capacity CX1, the second high withstand voltage electric capacity CX2, resistance R1
And fuse FU.
The external power source, the first inductance L1, the first high withstand voltage electric capacity CX1, the second high withstand voltage electric capacity CX2,
The second inductance L2 and piezo-resistance RV are sequentially connected in series, described resistance R1 one end access the second high withstand voltage electric capacity CX2 and
Between the first high withstand voltage electric capacity CX2, other end ground connection.
The fuse FU be connected with the voltage output end and with the first high withstand voltage electric capacity CX1 and described second
High withstand voltage electric capacity CX2 is arranged in parallel, and the first high withstand voltage electric capacity CX1 and the second high withstand voltage electric capacity CX2 collectively form electricity
Appearance group.
The frequency modulator 13 is arranged at the voltage output end 12, so as to allow the earth leakage protective device 1 can be according to aobvious
Frequency principle causes bigger by electric current, can more be offset to 50Hz, power consumption loss is determined, further such that output current is in gradual change type
Decline, 10mA is dropped to by 30mA.
In the present embodiment, the fuse FU is copper sheet, and the quantity of the fuse FU is 3.
The first inductance L1 is connected with a wherein side of the piezo-resistance RV with the live wire of the external power source, another
The square zero line with the external power source is connected.
The first inductance L1 and the second inductance L2 inductance value scope is 0.1~330 μ H.
Compared with correlation technique, earth leakage protective device 1 provided by the utility model has as follows
Beneficial effect：
1) it is bigger by electric current using aobvious frequency principle, it can more be offset to 50Hz, determine power consumption loss；
2) electric current declines in gradual change type, drops to 10mA by 30mA；
3) adjustable earth leakage protective watt level；
4) about 2s electric shock buffer time can be provided for the people to get an electric shock.
Embodiment of the present utility model is the foregoing is only, not thereby limits the scope of the claims of the present utility model, it is every
The equivalent structure or equivalent flow conversion made using the utility model specification and accompanying drawing content, or be directly or indirectly used in
Other related technical fields, are included in scope of patent protection of the present utility model.
Claims (5)
- A kind of 1. earth leakage protective device, it is characterised in that including voltage input end, leakage protection circuit, voltage output end and Frequency modulator, the voltage input end are connected with external power source, and the voltage output end is connected with the frequency modulator, the frequency modulator Connect external electric equipment, the leakage protection circuit includes piezo-resistance RV, the first inductance L1, the second inductance L2, first high The CX1 of resistance to voltage capacitance, the second high withstand voltage electric capacity CX2, resistance R1 and fuse FU, wherein, the voltage input end, described first Inductance L1, the first high withstand voltage electric capacity CX1, the second high withstand voltage electric capacity CX2, the second inductance L2 and piezo-resistance RV are successively The other end between the first high withstand voltage electric capacity CX1 and the second high withstand voltage electric capacity CX2 is accessed in series connection, described resistance R1 one end Ground connection, the fuse FU be connected with the voltage output end and with the first high withstand voltage electric capacity CX1 and described second high The CX2 of resistance to voltage capacitance is arranged in parallel.
- 2. earth leakage protective device according to claim 1, it is characterised in that the quantity of the fuse FU is three.
- 3. earth leakage protective device according to claim 1 or 2, it is characterised in that the fuse FU is copper sheet.
- 4. earth leakage protective device according to claim 1, it is characterised in that the external power source is three-phase alternating-current supply.
- 5. the earth leakage protective device according to claim 1 or 4, it is characterised in that the first inductance L1 and described second Inductance L2 inductance value scope is 0.1~330 μ H.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720363642.7U CN206992675U (en) | 2017-04-07 | 2017-04-07 | Earth leakage protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720363642.7U CN206992675U (en) | 2017-04-07 | 2017-04-07 | Earth leakage protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206992675U true CN206992675U (en) | 2018-02-09 |
Family
ID=61422948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720363642.7U Expired - Fee Related CN206992675U (en) | 2017-04-07 | 2017-04-07 | Earth leakage protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206992675U (en) |
-
2017
- 2017-04-07 CN CN201720363642.7U patent/CN206992675U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180209 Termination date: 20190407 |