CN202084902U - Residual current protector with overvoltage protection and alarm functions - Google Patents
Residual current protector with overvoltage protection and alarm functions Download PDFInfo
- Publication number
- CN202084902U CN202084902U CN2011202112164U CN201120211216U CN202084902U CN 202084902 U CN202084902 U CN 202084902U CN 2011202112164 U CN2011202112164 U CN 2011202112164U CN 201120211216 U CN201120211216 U CN 201120211216U CN 202084902 U CN202084902 U CN 202084902U
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- CN
- China
- Prior art keywords
- residual current
- circuit
- protective device
- overvoltage protection
- operated protective
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a residual current protector with overvoltage protection and alarm functions, which comprises a residual current protector body. An inlet wire of the residual current protector body is further connected with an overvoltage protection alarm circuit and is used for being connected with a mains supply. The residual current protector with the overvoltage protection and alarm functions can detect voltage of the mains supply, realizes short circuit of the mains supply when the voltage exceeds a certain range, accordingly leads the residual current protector body to act so as to be disconnected from a power source of a household electric appliance controlled by the residual current protector body, and reduces loss of users.
Description
Technical field
The utility model relates to electric power system and uses the residual current operated protective device field, relates in particular to a kind of overvoltage protection warning residual current operated protective device.
Background technology
At present; the residual current operated protective device that electric power system is now used is under rated condition; when residual current meets or exceeds set-point; the mechanical switch electrical equipment or the combined electrical apparatus of energy automatic shutoff circuit; but but do not have overvoltage protection to report to the police, zero line open circuit, zero line wrong in the sometimes vast distribution transformer can make 220V civil power moment become 380V; overtension then can burn out many household electrical appliance, causes certain loss to users.
The utility model content
The purpose of this utility model provides a kind of overvoltage protection warning residual current operated protective device, has the overvoltage protection warning function, can prevent that overtension from burning out household electrical appliance.
The utility model adopts following technical proposals: a kind of overvoltage protection warning residual current operated protective device; comprise residual current operated protective device; the inlet wire of described residual current operated protective device also is connected with the overvoltage protection warning circuit, and the inlet wire of residual current operated protective device is used for being electrically connected with the city.
Described overvoltage protection warning circuit comprises current rectifying and wave filtering circuit, bleeder circuit, voltage stabilizing reference circuit, relay and warning circuit, wherein the input of current rectifying and wave filtering circuit is connected with the inlet wire of residual current operated protective device, the output of current rectifying and wave filtering circuit is connected with the two ends of bleeder circuit, the intermediate point of bleeder circuit is connected with the reference edge of voltage stabilizing reference circuit, first end of bleeder circuit also is connected with first end of relay coil with diode by first resistance, and second end of bleeder circuit is connected with the anode of voltage stabilizing reference circuit; The negative electrode of voltage stabilizing reference circuit is connected with second end of relay coil; the anode of voltage stabilizing reference circuit also is connected with the positive pole of voltage stabilizing didoe; the negative pole of voltage stabilizing didoe is connected with first end of relay coil by warning circuit, and the normally opened contact of relay is connected with the inlet wire of residual current operated protective device.
The normally opened contact of described relay also is in series with a current-limiting resistance.
Also be connected with electric capacity between first end of described relay coil and the anode of voltage stabilizing reference circuit.
Described relay coil two ends also are parallel with fly-wheel diode.
Described bleeder circuit is made of second resistance the 3rd resistance of connecting.
Described warning circuit is a light-emitting diode.
The utility model overvoltage protection warning residual current operated protective device; can detect line voltage, when voltage surpasses certain limit, make city's electrical short; thereby residual current operated protective device is moved disconnect the power supply of its household electrical appliance of controlling, reduced users' loss.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
A kind of overvoltage protection warning of the utility model residual current operated protective device comprises residual current operated protective device, and the inlet wire of described residual current operated protective device also is connected with the overvoltage protection warning circuit, and the inlet wire of residual current operated protective device is used for being electrically connected with the city.As shown in Figure 1, the overvoltage protection warning circuit comprises current rectifying and wave filtering circuit, bleeder circuit, voltage stabilizing reference circuit, relay and warning circuit, wherein the input of current rectifying and wave filtering circuit is connected with the inlet wire of residual current operated protective device, current rectifying and wave filtering circuit is made of capacitor C 1, resistance R 4 and diode rectifier bridge B1, the output of diode rectifier bridge B1 also is connected with capacitor C 2, and the output of diode rectifier bridge B1 is that the output of current rectifying and wave filtering circuit is connected with bleeder circuit; Bleeder circuit is made of second resistance R 2 series connection the 3rd resistance R 3, wherein intermediate point Z point and voltage stabilizing reference circuit IC1(TL431C) reference edge R be connected; One end of second resistance R 2 is connected with first end of relay coil J with diode D1 by first resistance R 1, relay coil J two ends are parallel with sustained diode 2, one end of the 3rd resistance R 3 is connected with the anode A of voltage stabilizing reference circuit IC1, the negative electrode K of voltage stabilizing reference circuit IC1 is connected with second end of relay coil J, and capacitor C 3 is connected between the anode A of relay coil J first end and voltage stabilizing reference circuit IC1; The anode A of voltage stabilizing reference circuit IC1 also is connected with the positive pole of voltage stabilizing didoe D3, and the negative pole of voltage stabilizing didoe D3 is connected with first end of relay coil J by warning circuit (LED); The normally opened contact S1 of relay is connected the back and is connected with the inlet wire of residual current operated protective device with resistance R 5.
As shown in Figure 1, when mains-supplied voltage just often, the reference edge R voltage of voltage stabilizing reference circuit IC1 is less than 2.5V, not conducting of voltage stabilizing reference voltage IC1, then relay coil J must not be electric, and its normally opened contact S1 keeps normally open, and the luminous expression voltage of LED is normal.When mains-supplied voltage surpasses 250V; the reference edge R voltage of voltage stabilizing reference circuit IC1 is greater than 2.5V; the IC1 conducting; then relay coil J gets electric adhesive; make its normally opened contact S1 closure; with city's electrical short, then the power supply that is about to the household electrical appliance that residual current operated protective device controls of the overcurrent protection in the residual current operated protective device disconnects, and has protected household electrical appliance can not burnt out because of overvoltage.
Claims (7)
1. an overvoltage protection warning residual current operated protective device comprises residual current operated protective device, and it is characterized in that: the inlet wire of described residual current operated protective device also is connected with the overvoltage protection warning circuit, and the inlet wire of residual current operated protective device is used for being electrically connected with the city.
2. overvoltage protection warning residual current operated protective device according to claim 1, it is characterized in that: described overvoltage protection warning circuit comprises current rectifying and wave filtering circuit, bleeder circuit, the voltage stabilizing reference circuit, relay and warning circuit, wherein the input of current rectifying and wave filtering circuit is connected with the inlet wire of residual current operated protective device, the output of current rectifying and wave filtering circuit is connected with the two ends of bleeder circuit, the intermediate point of bleeder circuit is connected with the reference edge of voltage stabilizing reference circuit, first end of bleeder circuit also is connected with first end of relay coil with diode by first resistance, and second end of bleeder circuit is connected with the anode of voltage stabilizing reference circuit; The negative electrode of voltage stabilizing reference circuit is connected with second end of relay coil; the anode of voltage stabilizing reference circuit also is connected with the positive pole of voltage stabilizing didoe; the negative pole of voltage stabilizing didoe is connected with first end of relay coil by warning circuit, and the normally opened contact of relay is connected with the inlet wire of residual current operated protective device.
3. overvoltage protection warning residual current operated protective device according to claim 2, it is characterized in that: the normally opened contact of described relay also is in series with a current-limiting resistance.
4. overvoltage protection warning residual current operated protective device according to claim 3 is characterized in that: also be connected with electric capacity between first end of described relay coil and the anode of voltage stabilizing reference circuit.
5. overvoltage protection warning residual current operated protective device according to claim 4 is characterized in that: described relay coil two ends also are parallel with fly-wheel diode.
6. overvoltage protection warning residual current operated protective device according to claim 5 is characterized in that: described bleeder circuit is made of second resistance the 3rd resistance of connecting.
7. overvoltage protection warning residual current operated protective device according to claim 6 is characterized in that: described warning circuit is a light-emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202112164U CN202084902U (en) | 2011-06-22 | 2011-06-22 | Residual current protector with overvoltage protection and alarm functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202112164U CN202084902U (en) | 2011-06-22 | 2011-06-22 | Residual current protector with overvoltage protection and alarm functions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202084902U true CN202084902U (en) | 2011-12-21 |
Family
ID=45345519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202112164U Expired - Fee Related CN202084902U (en) | 2011-06-22 | 2011-06-22 | Residual current protector with overvoltage protection and alarm functions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202084902U (en) |
-
2011
- 2011-06-22 CN CN2011202112164U patent/CN202084902U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111221 Termination date: 20120622 |