CN205248764U - Electric power system safety protection circuit - Google Patents
Electric power system safety protection circuit Download PDFInfo
- Publication number
- CN205248764U CN205248764U CN201521034482.9U CN201521034482U CN205248764U CN 205248764 U CN205248764 U CN 205248764U CN 201521034482 U CN201521034482 U CN 201521034482U CN 205248764 U CN205248764 U CN 205248764U
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- China
- Prior art keywords
- relay
- diode
- capacitor
- resistance
- contact
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- 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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- Emergency Protection Circuit Devices (AREA)
- Relay Circuits (AREA)
Abstract
The utility model discloses an electric power system safety protection circuit, including button K1, relay J1, relay J2, chip IC1 and diode D3, relay J1's contact J1 -1 and 220V alternating current are connected to button K1's one end, button K1's other end connecting resistance R1, electric capacity C1, relay J1's contact J1 -1's the other end, relay J1 and relay J2's contact J2 -1, electric capacity C1's the other end and diode D1's positive pole are connected to resistance R1's the other end, electric capacity C4 summation potential ware RP1's a stiff end is connected to diode D3's negative pole connecting resistance R3's the other end. The utility model discloses electric power system safety protection circuit passes through the combination of switching power supply chip and relay, has realized surge protection, and the electric loading is used in the disconnection when the circuit voltage exceeds the critical value, protects to still have self -locking function, simultaneously circuit structure is simple, components and parts are few, has consequently that the cost of manufacture is low, convenient to use and an effectual advantage of protection.
Description
Technical field
The utility model relates to a kind of holding circuit, specifically a kind of power system security holding circuit.
Background technology
Surge mainly refers to the strong pulse that moment breath that power supply just opened produces, and all can produce, for example in a lot of situationsThe reasons such as thunderbolt, misphase, short circuit all can cause producing in circuit surge, non-linear likely higher than electricity due to circuit itselfThe pulse in source itself; Or because being subject to or external spike interference own, other parts in power supply or circuit are called surge, itProbably make circuit the burning out in a flash of surge, as PN junction electric capacity punctures, resistance blows etc. Surge is divided into surge electricityTwo kinds of stream and surge voltages, and surge protection utilizes the protection of the sensitivity design of non-linear element to high frequency (surge) exactlyCircuit, sort circuit poor stability, protection effect limited.
Utility model content
The purpose of this utility model is to provide a kind of power system security holding circuit, proposes to solve in above-mentioned background technologyProblem.
For achieving the above object, the utility model provides following technical scheme:
A kind of power system security holding circuit, comprises button K1, relay J 1, relay J 2, chip IC 1 and two utmost pointsPipe D3, one end of described button K1 connects contact J1-1 and the 220V alternating current of relay J 1, the other end of button K1The contact of the other end, relay J 1 and the relay J 2 of the contact J1-1 of contact resistance R1, capacitor C 1, relay J 1J2-1, the other end of resistance R 1 connects the other end of capacitor C 1 and the anode of diode D1, and the negative electrode of diode D3 connectsThe other end of resistance R 3 connects a stiff end of capacitor C 4 and potentiometer RP1, another of the contact J2-1 of relay J 2End connects capacitor C 2, capacitor C 4, resistance R 2, the other end of relay J 1, the other end and the potentiometer of 220V alternating currentAnother stiff end of RP1, the negative electrode of diode D1 connects the pin of negative electrode, capacitor C 3 and the chip IC 1 of diode D41, the pin 5 of chip IC 1 connects negative electrode and the resistance R 4 of capacitor C 5, diode D2, and the other end of resistance R 4 connects electricityThe sliding end of position device RP1, the other end of resistance R 2 connect the other end, the capacitor C 5 of capacitor C 3 the other end, capacitor C 6,The pin 4 of negative electrode, relay J 2 and the chip IC 1 of the anode of diode D2, the anode of diode D4, diode D5,Pin 3 contact resistance R5, the other end of capacitor C 6 and the other end of relay J 2 of chip IC 1, another of resistance R 5End connects the anode of diode D5, and the model of described chip IC 1 is TWH8778.
As preferred version of the present utility model: described relay J 1 is normally opened contact relay.
As preferred version of the present utility model: described relay J 2 is closed relay for often opening to touch.
As preferred version of the present utility model: described diode D5 is light emitting diode.
Compared with prior art, the beneficial effects of the utility model are: the utility model power system security holding circuit is passed throughThe combination of switching power source chip and relay, has realized surge protection, disconnection electric loading in the time that circuit voltage exceeds critical value,Protect, and have auto-lock function, simultaneously circuit structure is simple, components and parts are few, therefore have cost of manufacture low,Advantage easy to use and protection is effective.
Brief description of the drawings
Fig. 1 is the circuit diagram of power system security holding circuit.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out clearlyChu, intactly description, obviously, described embodiment is only the utility model part embodiment, instead of wholeEmbodiment. Based on the embodiment in the utility model, those of ordinary skill in the art are not making under creative work prerequisiteThe every other embodiment obtaining, belongs to the scope that the utility model is protected.
Refer to Fig. 1, a kind of power system security holding circuit, comprises button K1, relay J 1, relay J 2, coreSheet IC1 and diode D3, one end of described button K1 connects contact J1-1 and the 220V alternating current of relay J 1, buttonThe other end, relay J 1 and the relay of the contact J1-1 of the other end contact resistance R1 of K1, capacitor C 1, relay J 1The contact J2-1 of J2, the other end of resistance R 1 connects the other end of capacitor C 1 and the anode of diode D1, diode D3The other end of negative electrode contact resistance R3 connect a stiff end of capacitor C 4 and potentiometer RP1, the contact of relay J 2The other end of J2-1 connects another of the other end, 220V alternating current of capacitor C 2, capacitor C 4, resistance R 2, relay J 1Another stiff end of end and potentiometer RP1, the negative electrode of diode D1 connects negative electrode, capacitor C 3 and the core of diode D4The pin 1 of sheet IC1, the pin 5 of chip IC 1 connects negative electrode and the resistance R 4 of capacitor C 5, diode D2, resistance R 4The other end connects the sliding end of potentiometer RP1, and the other end of resistance R 2 connects the other end, capacitor C 5 another of capacitor C 3Negative electrode, relay J 2 and the core of the anode of one end, capacitor C 6, diode D2, the anode of diode D4, diode D5The pin 4 of sheet IC1, pin 3 contact resistance R5, the other end of capacitor C 6 and the other end of relay J 2 of chip IC 1,The other end of resistance R 5 connects the anode of diode D5, and the model of described chip IC 1 is TWH8778.
Relay J 1 is normally opened contact relay. Relay J 2 is closed relay for often opening to touch. Diode D5 is light-emitting diodesPipe.
Operation principle of the present utility model is: when use, press start button K1, civil power 220V voltage is normally closed through J2'sContact J2-1 connects load A, and while relay J 1 coil obtains electric, the J1-1 adhesive of its contact self-locking, 220V civil power warpC1, C2, D1, D4 provide stable operating voltage for switch integrated circuit, and D3, R3 and RP1 form pressure sampling circuit.In the time of line voltage normal power supply, D2 can not conducting, and 5 pin operating voltages of chip IC 1 are lower, and its internal switch is failure to actuate,Relay J 2 not adhesives, civil power is the output of socket normal power supply through J2 normally-closed contact J2-1; When running into thunderbolt, blow hard,Power supply department zero line and phase line wrong and seriously imbalance of threephase load, causes line voltage higher than normally in when maintenanceValue is 275V when above, and diode D2 punctures conducting, more than 5 pin current potentials of chip IC 1 rise to 1.6V. Make IC1Internal switch conducting. 3 pin output high level of chip IC 1, relay J 2 adhesives, its normally-closed contact J2-1 disconnects, and usesElectric power supply cuts off immediately, thereby avoids the unnecessary economic loss of bringing to consumer electronics because of overvoltage.
Claims (4)
1. a power system security holding circuit, comprises button K1, relay J 1, relay J 2, chip IC 1 and twoUtmost point pipe D3, is characterized in that, one end of described button K1 connects contact J1-1 and the 220V alternating current of relay J 1, pressesThe other end, the relay J 1 of the contact J1-1 of the other end contact resistance R1 of key K1, capacitor C 1, relay J 1 and continuingThe contact J2-1 of electrical equipment J2, the other end of resistance R 1 connects the other end of capacitor C 1 and the anode of diode D1, diodeThe other end of the negative electrode contact resistance R3 of D3 connects a stiff end of capacitor C 4 and potentiometer RP1, the touching of relay J 2The other end of putting J2-1 connects the another of the other end of capacitor C 2, capacitor C 4, resistance R 2, relay J 1,220V alternating currentAnother stiff end of one end and potentiometer RP1, the negative electrode of diode D1 connects negative electrode, capacitor C 3 and of diode D4The pin 1 of chip IC 1, the pin 5 of chip IC 1 connects negative electrode and the resistance R 4 of capacitor C 5, diode D2, resistance R 4The other end connect the sliding end of potentiometer RP1, the other end of resistance R 2 connects the other end, the capacitor C 5 of capacitor C 3The negative electrode of the anode of the other end, capacitor C 6, diode D2, the anode of diode D4, diode D5, relay J 2 andThe pin 4 of chip IC 1, another of the pin 3 contact resistance R5 of chip IC 1, the other end of capacitor C 6 and relay J 2End, the other end of resistance R 5 connects the anode of diode D5, and the model of described chip IC 1 is TWH8778.
2. according to a kind of power system security holding circuit claimed in claim 1, it is characterized in that, described relay J 1 isNormally opened contact relay.
3. according to a kind of power system security holding circuit claimed in claim 1, it is characterized in that, described relay J 2 isOften open to touch and close relay.
4. according to a kind of power system security holding circuit claimed in claim 1, it is characterized in that, described diode D5 isLight emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521034482.9U CN205248764U (en) | 2015-12-13 | 2015-12-13 | Electric power system safety protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521034482.9U CN205248764U (en) | 2015-12-13 | 2015-12-13 | Electric power system safety protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205248764U true CN205248764U (en) | 2016-05-18 |
Family
ID=55947837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521034482.9U Expired - Fee Related CN205248764U (en) | 2015-12-13 | 2015-12-13 | Electric power system safety protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205248764U (en) |
-
2015
- 2015-12-13 CN CN201521034482.9U patent/CN205248764U/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 | ||
| 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: 20160518 Termination date: 20161213 |