CN201185337Y - Multifunctional overvoltage, time-delay and display protection switch - Google Patents
Multifunctional overvoltage, time-delay and display protection switch Download PDFInfo
- Publication number
- CN201185337Y CN201185337Y CNU2007200126946U CN200720012694U CN201185337Y CN 201185337 Y CN201185337 Y CN 201185337Y CN U2007200126946 U CNU2007200126946 U CN U2007200126946U CN 200720012694 U CN200720012694 U CN 200720012694U CN 201185337 Y CN201185337 Y CN 201185337Y
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- overvoltage
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- delay
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Abstract
The utility model belongs to low-voltage apparatus protection switch, in particular to multi-functional excessive pressure, time delay, demonstration protection switch, this kind of multi-functional excessive pressure, time delay, demonstration protection switch increase mains voltage display circuit, excessive pressure time delay protection circuit by the basic structure of circuit breaker, electric leakage detection circuitry, electric leakage execution circuit and constitute, its special character is: the input termination of circuit breaker has mains voltage display circuit, circuit breaker's output and overvoltage protection electrical apparatus's input to meet, and overvoltage protection circuit's output meets with the input of electric leakage executive circuit, the beneficial effects of the utility model are that: the overvoltage protection value is accurate, the overvoltage delay time is shortened along with the rise of the overvoltage value, the electric equipment is effectively protected from being damaged, and the overvoltage protection device has the functions of undervoltage, normal voltage, overvoltage and display.
Description
Technical field
The utility model belongs to the low-voltage electrical apparatus protection switch, particularly a kind of multi-functional overvoltage, time-delay, demonstration protection switch.
Background technology
At present, existing low-voltage electrical apparatus protection switch has overload short circuit and earth leakage circuit-breaker; these several low-voltage electrical apparatus protection switches are common exist under-voltage; normal voltage and overvoltage can not show and the unfixed problem of overvoltage protection value, make electric equipment cause damage easily.
Summary of the invention
In order to overcome the problems referred to above; the utility model provides a kind of multi-functional overvoltage, time-delay, demonstration protection switch; this multi-functional overvoltage shows protection switch; supply voltage shows the dichromatic LED in the electrical equipment; can show under-voltage, normal voltage and overvoltage; diac in the overvoltage crowbar has the standing valve threshold voltage; can accurately detect the supply voltage overpressure value; solved under-voltage that present low-voltage electrical apparatus switch exists, normal voltage and overvoltage can not show and the unfixing flimsy problem of electric equipment that easily causes of overvoltage protection value.
The technical scheme in the invention for solving the technical problem is: a kind of multi-functional overvoltage, time-delay, demonstration protection switch; basic structure by disconnect, electric-leakage detection circuit, electric leakage executive circuit increases the supply voltage display circuit, overvoltage delay protection circuit is formed; its special character is: input A, the B of disconnect is connected to the output X of supply voltage display circuit, disconnect and the input of overvoltage protection electrical equipment joins, and the output of overvoltage crowbar joins with the input Y of electric leakage executive circuit.
The invention has the beneficial effects as follows: the overvoltage protection value is accurate, and overvoltage time-delay raises with overvoltage value and delay time shortens, and effectively protects electric equipment to damage, and has under-voltage, normal voltage and overvoltage, Presentation Function.
Description of drawings
Accompanying drawing 1 is a structured flowchart of the present utility model.
1 is disconnect, the 5th in the accompanying drawing 1, electric-leakage detection circuit, the 3rd, and electric leakage executive circuit, the 2nd, supply voltage display circuit, the 4th, overvoltage delay protection circuit, A, B are that disconnect input, X, Y are input, the output of overvoltage crowbar.
Accompanying drawing 2 is a supply voltage display circuit schematic diagram.
In the accompanying drawing 2, A, B are the inputs of disconnect, and YM1 is a piezo-resistance, and R1, R2 are current-limiting resistances, and D1, D2 are that light-emitting diode, D3 are that rectifier diode, Dw are that voltage stabilizing didoe, BT1 are controllable silicons.
Accompanying drawing 3 is overvoltage delay protection circuit structure diagrams.
In the accompanying drawing 3, X, Y are the fan-outs of overvoltage delay circuit, and Y is connected to the D4 rectifier diode, R4, R5 divider resistance, YM2 piezo-resistance C charging capacitor, R6 discharge resistance, DF diac.
Accompanying drawing 4 is circuit theory diagrams of the present utility model.
K1 disconnect, K2 test switch, R3 test resistance, L1 tripping coil, L2 zero-sequence current magnetic test coil, QD detection drive circuit, BT2 controllable silicon, D5 rectifier bridge are prior art leakage protection switch circuit and accompanying drawing 2 and accompanying drawing 3 formations in the accompanying drawing 4.
Specific embodiment:
Below in conjunction with accompanying drawing an embodiment is described:
Accompanying drawing 2 supply voltage voltages show circuit structure diagram, YM1 piezo-resistance and the R2 current-limiting resistance BT1 silicon controlled control utmost point that is connected in series, connect with the D2 light-emitting diode, Dw voltage stabilizing didoe, D1 light-emitting diode are connected again after R1 current-limiting resistance and the parallel connection of BT1 controllable silicon again.Constitute the supply voltage display circuit.
Accompanying drawing 3: overvoltage delay protection structure chart, the D4 rectifier diode back of connecting with the R4 divider resistance links with divider resistance R5, connect the other end of piezo-resistance YM2 and the composition afterwards of connecting with diac DF again after C, R6 link again with piezo-resistance YM2.
Accompanying drawing 4: circuit theory diagrams of the present utility model; electric-leakage detection circuit is made of L2 zero current instrument transformer; the electric leakage executive circuit is made up of BT2 controllable silicon, D5 rectifier bridge, L1 tripping coil; input A, the B of supply voltage display circuit and disconnect join; the input of overvoltage delay protection circuit and the output X of disconnect join, and the output of overvoltage delay protection circuit joins with the input Y of electric leakage executive circuit.
Claims (1)
1; a kind of multi-functional overvoltage; time-delay; show protection switch; by disconnect; electric-leakage detection circuit; the basic structure of electric leakage executive circuit increases the supply voltage display circuit; overvoltage delay protection circuit is formed; it is characterized in that: the input A of disconnect; B is connected to the supply voltage display circuit; the output X of disconnect and the input of overvoltage protection electrical equipment join; the output of overvoltage crowbar joins with the input Y of electric leakage executive circuit; YM1 piezo-resistance and the R2 current-limiting resistance BT1 silicon controlled control utmost point that is connected in series; connect with the D2 light-emitting diode again; R1 current-limiting resistance and Dw voltage stabilizing didoe again after the BT1 controllable silicon is in parallel; the series connection of D1 light-emitting diode; constitute the supply voltage display circuit; after connecting with the R4 divider resistance, the D4 rectifier diode links with divider resistance R5; connect the other end of piezo-resistance YM2 and C again with piezo-resistance YM2; form overvoltage crowbar after connecting with diac DF again after R6 links.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200126946U CN201185337Y (en) | 2007-06-15 | 2007-06-15 | Multifunctional overvoltage, time-delay and display protection switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200126946U CN201185337Y (en) | 2007-06-15 | 2007-06-15 | Multifunctional overvoltage, time-delay and display protection switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201185337Y true CN201185337Y (en) | 2009-01-21 |
Family
ID=40273070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200126946U Expired - Fee Related CN201185337Y (en) | 2007-06-15 | 2007-06-15 | Multifunctional overvoltage, time-delay and display protection switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201185337Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10263416B2 (en) | 2012-12-03 | 2019-04-16 | Huawei Technologies Co., Ltd. | Overvoltage protection apparatus and method |
-
2007
- 2007-06-15 CN CNU2007200126946U patent/CN201185337Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10263416B2 (en) | 2012-12-03 | 2019-04-16 | Huawei Technologies Co., Ltd. | Overvoltage protection apparatus and method |
| US11404867B2 (en) | 2012-12-03 | 2022-08-02 | Huawei Techologies Co., Ltd. | Overvoltage protection apparatus and method |
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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: 20090121 |