CN203504138U - Multipurpose protective device for electrical appliance - Google Patents
Multipurpose protective device for electrical appliance Download PDFInfo
- Publication number
- CN203504138U CN203504138U CN201320577473.9U CN201320577473U CN203504138U CN 203504138 U CN203504138 U CN 203504138U CN 201320577473 U CN201320577473 U CN 201320577473U CN 203504138 U CN203504138 U CN 203504138U
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- resistance
- triode
- diode
- electric capacity
- protective device
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Abstract
The utility model discloses a multipurpose protective device for electrical appliances. The multipurpose protective device comprises a first resistor to an eleventh resistor, a transformer, a rectifier, a first resistor to a third resistor, a first diode, a second diode, a first triode to a fifth triode, a voltage-regulator tube, a potentiometer, and a bidirectional silicon controlled rectifier. One an input voltage exceeds a preset voltage, the first triode is switched on, the second triode, the third triode and the fourth triode are cut off, the bidirectional silicon controlled rectifier is switched off due to no trigger current, and a main loop is cut off. A cutoff voltage can be preset by adjusting the potentiometer. The multipurpose protective device is suitable for the power supply protection of various electrical appliances, has a wide application scope, and can effectively protect the electrical appliances and prolong the service life of each electrical appliance; and compared with similar products in the prior art, the multipurpose protective device is characterized by simple circuit structure, few adopted elements and low cost, thereby facilitating popularization and promotion.
Description
Technical field
The utility model relates to a kind of Protector for electric appliances, relates in particular to a kind of over-pressure safety device that is applicable to multiple electrical equipment.
Background technology
The overvoltage protector of electronic apparatus is at the supply voltage when protected circuit during higher than certain numerical value, and protector cuts off this circuit; When supply voltage returns to normal range (NR), protector is connected automatically.And the application of overvoltage protector of the prior art is single, a protector is only for a kind of electrical equipment, and the scope of application is not extensively seen, and circuit structure is complicated, employing electronic component is many, cost is higher, is unfavorable for universal and promotes.
Utility model content
The purpose of this utility model provides a kind of over-pressure safety device that is applicable to multiple electrical equipment with regard to being in order to address the above problem.
The utility model is achieved through the following technical solutions above-mentioned purpose:
The utility model comprises transformer, rectifier, the first resistance to the 11 resistance, the first electric capacity to the three electric capacity, the first diode, the second diode, the first triode to the five triodes, voltage-stabiliser tube, potentiometer and bidirectional triode thyristor, the zero line while of AC power and the positive pole of described the first diode, the first end of described primary is connected with the first end of the multiplex protective device output of described electrical equipment, the live wire while of described AC power and the first end of described bidirectional triode thyristor, the emitter of described the second triode, the first end of described the 11 resistance, the first end of described the 3rd electric capacity, the second end of the emitter of described the 5th triode and described primary is connected, the second end of described bidirectional triode thyristor is the second end of described overvoltage crowbar output, the negative pole of described the first diode is connected with the first end of described the first resistance, the second end of described the first resistance is connected with the first end of described the 3rd electric capacity with the first end of described potentiometer simultaneously, the two ends of described transformer secondary output are connected with two inputs of described rectifier respectively, the cathode output end of described rectifier is connected with the collector electrode of described the 5th triode with the first end of described the second resistance simultaneously, the second end of described the second resistance is connected with the base stage of described the 5th triode with the negative pole of described voltage-stabiliser tube simultaneously, the cathode output end of described rectifier is connected with the positive pole of described voltage-stabiliser tube, the second end of described potentiometer is connected with the second end of described the 11 resistance, the sliding end of described potentiometer is connected with the negative pole of described the second diode, the positive pole of described the second diode is connected with the first end of described the tenth resistance, the second end of described the tenth resistance is connected with the first end of described the second electric capacity with the base stage of described the 4th triode simultaneously, the emitter of described the 4th triode is connected with the emitter of described the 3rd triode with the first end of described the 9th resistance simultaneously, the second end while of described the second electric capacity and the first end of described the 8th resistance, the base stage of described the 3rd triode, the first end of described the 7th resistance is connected with the first end of described the first electric capacity, the second end of described the 8th resistance is connected with the second end of described the 9th resistance, the collector electrode while of described the 4th triode and the second end of described the 7th resistance, the second end of described the first electric capacity is connected with the first end of described the 6th resistance, the second end of described the 6th resistance is connected with the second end of described the 5th resistance, the collector electrode of described the second triode is connected with the first end of described the 3rd resistance with the first end of described the 4th resistance simultaneously, the second end of described the 4th resistance is connected with the emitter of described the first triode, the second end of described the 3rd resistance is connected with the base stage of described the first triode, the collector electrode of described the first triode is connected with the control end of described bidirectional triode thyristor.
The beneficial effects of the utility model are:
The utility model can be suitable for the power protection with multiple electrical appliance; applied range, the useful life of effectively protecting electrical appliance and improving electrical appliance, and compared with prior art; have circuit structure simple, adopt element feature few, with low cost, be conducive to universal and promote.
Accompanying drawing explanation
Fig. 1 is circuit structure schematic diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1: the utility model comprises transformer T, rectifier DR, the first resistance R 1 to the 11 resistance R 11, the first capacitor C 1 is to the 3rd capacitor C 3, the first diode D1, the second diode D2, the first triode VT1 to the five triode VT5, voltage-stabiliser tube DW, potentiometer RP and bidirectional triode thyristor SCR, the zero line while of AC power and the positive pole of the first diode D1, the elementary first end of transformer T is connected with the first end of the multiplex protective device output of electrical equipment OUT, the live wire while of AC power and the first end of bidirectional triode thyristor SCR, the emitter of the second triode VT2, the first end of the 11 resistance R 11, the first end of the 3rd capacitor C 3, the emitter of the 5th triode VT5 second end elementary with transformer T is connected, the second end of bidirectional triode thyristor SCR is the second end of overvoltage crowbar output, the negative pole of the first diode D1 is connected with the first end of the first resistance R 1, the second end of the first resistance R 1 is connected with the first end of the 3rd capacitor C 3 with the first end of potentiometer RP simultaneously, the two ends of T level of transformer are connected with two inputs of rectifier DR respectively, the cathode output end of rectifier DR is connected with the collector electrode of the 5th triode VT5 with the first end of the second resistance R 2 simultaneously, the second end of the second resistance R 2 is connected with the base stage of the 5th triode VT5 with the negative pole of voltage-stabiliser tube DW simultaneously, the cathode output end of rectifier DR is connected with the positive pole of voltage-stabiliser tube DW, the second end of potentiometer RP is connected with the second end of the 11 resistance R 11, the sliding end of potentiometer RP is connected with the negative pole of the second diode D2, the positive pole of the second diode D2 is connected with the first end of the tenth resistance R 11, the second end of the tenth resistance R 10 is connected with the first end of the second capacitor C 2 with the base stage of the 4th triode VT4 simultaneously, the emitter of the 4th triode VT4 is connected with the emitter of the 3rd triode VT3 with the first end of the 9th resistance R 9 simultaneously, the second end while of the second capacitor C 2 and the first end of the 8th resistance R 8, the base stage of the 3rd triode VT3, the first end of the 7th resistance R 7 is connected with the first end of the first capacitor C 1, the second end of the 8th resistance R 8 is connected with the second end of the 9th resistance R 9, the collector electrode while of the 4th triode VT4 and the second end of the 7th resistance R 7, the second end of the first capacitor C 1 is connected with the first end of the 6th resistance R 6, the second end of the 6th resistance R 6 is connected with the second end of the 5th resistance R 5, the collector electrode of the second triode VT2 is connected with the first end of the 3rd resistance R 3 with the first end of the 4th resistance R 4 simultaneously, the second end of the 4th resistance R 4 is connected with the emitter of the first triode VT1, the second end of the 3rd resistance R 3 is connected with the base stage of the first triode VT1, the collector electrode of the first triode VT1 is connected with the control end of bidirectional triode thyristor SCR.
As shown in Figure 1: while normally working; the second triode VT2, the 3rd triode VT3, the 4th triode VT4 conducting; the bidirectional triode thyristor SCR conducting that is triggered; protected power connection; once input voltage surpasses preset voltage, the first triode VT1 conducting, the second triode VT2, the 3rd triode VT3, the 4th triode VT4 by; bidirectional triode thyristor SCR triggerless electric current and turn-offing, major loop is disconnected.Regulator potentiometer RP, can preset off voltage.
Claims (1)
1. the multiplex protective device of electrical equipment, it is characterized in that: comprise transformer, rectifier, the first resistance to the 11 resistance, the first electric capacity to the three electric capacity, the first diode, the second diode, the first triode to the five triodes, voltage-stabiliser tube, potentiometer and bidirectional triode thyristor, the zero line while of AC power and the positive pole of described the first diode, the first end of described primary is connected with the first end of the multiplex protective device output of described electrical equipment, the live wire while of described AC power and the first end of described bidirectional triode thyristor, the emitter of described the second triode, the first end of described the 11 resistance, the first end of described the 3rd electric capacity, the second end of the emitter of described the 5th triode and described primary is connected, the second end of described bidirectional triode thyristor is the second end of described overvoltage crowbar output, the cathode output end of described rectifier is connected with the positive pole of described voltage-stabiliser tube, the second end of described potentiometer is connected with the second end of described the 11 resistance, the sliding end of described potentiometer is connected with the negative pole of described the second diode, the positive pole of described the second diode is connected with the first end of described the tenth resistance, the second end of described the tenth resistance is connected with the first end of described the second electric capacity with the base stage of described the 4th triode simultaneously, the emitter of described the 4th triode is connected with the emitter of described the 3rd triode with the first end of described the 9th resistance simultaneously, the negative pole of described the first diode is connected with the first end of described the first resistance, the second end of described the first resistance is connected with the first end of described the 3rd electric capacity with the first end of described potentiometer simultaneously, the two ends of described transformer secondary output are connected with two inputs of described rectifier respectively, the cathode output end of described rectifier is connected with the collector electrode of described the 5th triode with the first end of described the second resistance simultaneously, the second end of described the second resistance is connected with the base stage of described the 5th triode with the negative pole of described voltage-stabiliser tube simultaneously, the second end while of described the second electric capacity and the first end of described the 8th resistance, the base stage of described the 3rd triode, the first end of described the 7th resistance is connected with the first end of described the first electric capacity, the second end of described the 8th resistance is connected with the second end of described the 9th resistance, the collector electrode while of described the 4th triode and the second end of described the 7th resistance, the second end of described the first electric capacity is connected with the first end of described the 6th resistance, the second end of described the 6th resistance is connected with the second end of described the 5th resistance, the collector electrode of described the second triode is connected with the first end of described the 3rd resistance with the first end of described the 4th resistance simultaneously, the second end of described the 4th resistance is connected with the emitter of described the first triode, the second end of described the 3rd resistance is connected with the base stage of described the first triode, the collector electrode of described the first triode is connected with the control end of described bidirectional triode thyristor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320577473.9U CN203504138U (en) | 2013-09-18 | 2013-09-18 | Multipurpose protective device for electrical appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320577473.9U CN203504138U (en) | 2013-09-18 | 2013-09-18 | Multipurpose protective device for electrical appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203504138U true CN203504138U (en) | 2014-03-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320577473.9U Expired - Fee Related CN203504138U (en) | 2013-09-18 | 2013-09-18 | Multipurpose protective device for electrical appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203504138U (en) |
-
2013
- 2013-09-18 CN CN201320577473.9U patent/CN203504138U/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 |
Granted publication date: 20140326 Termination date: 20140918 |
|
| EXPY | Termination of patent right or utility model |