CN205265229U - Electrical load safety protection system - Google Patents
Electrical load safety protection system Download PDFInfo
- Publication number
- CN205265229U CN205265229U CN201521106595.5U CN201521106595U CN205265229U CN 205265229 U CN205265229 U CN 205265229U CN 201521106595 U CN201521106595 U CN 201521106595U CN 205265229 U CN205265229 U CN 205265229U
- Authority
- CN
- China
- Prior art keywords
- resistance
- chip
- diode
- triode
- connects
- 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
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses an electrical load safety protection system, including resistance R3, resistance R4, chip IC1, diode D1 and triode V1, resistance R3's one end connecting resistance R5, electric capacity C1, triode V2's projecting pole, relay J's contact J -1 and power VCC, resistance R3's other end connecting resistance R4, electric capacity C2, chip IC1's pin 1 and chip IC2's pin 1, electric capacity C2's the other end is connected to electric capacity C1's the other end, electric capacity C3, resistance R2, resistance R4's the other end, diode D3's positive pole, relay J, triode V1's projecting pole, the adjustable reference source P's of three -terminal positive pole, potentiometre RP2's stiff end and load A. The utility model discloses electrical load safety protection system circuit structure is simple, components and parts are few, provides effectual protection to excessive pressure, the under -voltage condition that exists in the electric wire netting to still have the advantage that the time delay starts, prevented that the circuit from relapseing the harm that the saltus step caused, consequently has the convenient and manifold advantage of function with low costs, practical.
Description
Technical field
The utility model relates to a kind of protection system, specifically a kind of electrical load safety system.
Background technology
Along with the development of power industry, increasing household electrical appliance have entered ordinary people family, especially now electricitySub-industry development and rapid, from lighting to refrigerator and air conditioner, then to electric motor car, the electromagnetic oven constantly promoted in recent years,The stability that can say domestic electric network is directly connected to daily life, and power circuit be transferred to domestic electric network timeWait and often occur the phenomenon such as electromagnetic interference, power network fluctuation, cause electricity consumption negative electricity to occur overvoltage, overcurrent condition, easily cause useBurning of electric loading, traditional most complex structure of over-voltage over-current protection system, cost of manufacture is high, and is subject to electromagnetic interference,Hinder it and promoted the use of, and the easily saltus step repeatedly because of of short duration fluctuation of existing protection system, circuit and load givenCause very big infringement.
Utility model content
The purpose of this utility model is to provide a kind of electrical load safety system, proposes to solve in above-mentioned background technologyProblem.
For achieving the above object, the utility model provides following technical scheme:
A kind of electrical load safety system, comprises resistance R 3, resistance R 4, chip IC 1, diode D1 and triodeV1, one end contact resistance R5 of described resistance R 3, capacitor C 1, the emitter stage of triode V2, the contact J-1 of relay JWith power supply VCC, other end contact resistance R4, capacitor C 2, the pin 1 of chip IC 1 and the drawing of chip IC 2 of resistance R 3Pin 1, the other end of capacitor C 1 connects the other end, capacitor C 3, the resistance R 2 of capacitor C 2, the other end, two of resistance R 4The anode of utmost point pipe D3, relay J, the emitter stage of triode V1, the anode of three end adjustable reference source P, potentiometer RP2Stiff end and load A, negative electrode contact resistance R1, the other end of resistance R 5, the current potential of three end adjustable reference source PStiff end of device RP1 and another stiff end of potentiometer RP2, another stiff end ground connection of potentiometer RP1, electricityThe sliding end of position device RP1 connects the pin 3 of chip IC1, and the sliding end of potentiometer RP2 connects the pin 3 of chip IC2,The pin 4 of chip IC 1 connects the anode of diode D1, and the negative electrode of diode D1 connects negative electrode and three utmost points of diode D2The base stage of pipe V1, the pin 4 of chip IC 2 connects the anode of diode D2, and the colelctor electrode of triode V1 connects capacitor C 3The other end and resistance R 6, the base stage of the other end connecting triode V2 of resistance R 6, the colelctor electrode of triode V2 connects and continuesThe negative electrode of the other end of electrical equipment J and diode D3, the other end of the contact J-1 of relay J connects the other end of load A,The model of described chip IC 1 and chip IC 2 is LM321.
As preferred version of the present utility model: described diode D1 and diode D2 are light emitting diode.
Compared with prior art, the beneficial effects of the utility model are: the utility model electrical load safety system circuitSimple in structure, components and parts are few, provide effective protection for the overvoltage existing in electrical network, undervoltage condition, and have and prolongThe advantage of Shi Qidong, has prevented the circuit infringement that saltus step causes repeatedly, therefore has low, the practical and convenient and diverse in function of costAdvantage.
Brief description of the drawings
Fig. 1 is the circuit diagram of electrical load safety system.
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 electrical load safety system, comprises resistance R 3, resistance R 4, chip IC 1, diodeD1 and triode V1, one end contact resistance R5 of described resistance R 3, capacitor C 1, the emitter stage of triode V2, relayThe contact J-1 of J and power supply VCC, pin 1 and of the other end contact resistance R4 of resistance R 3, capacitor C 2, chip IC 1The pin 1 of chip IC 2, the other end of capacitor C 1 connects the other end, capacitor C 3, resistance R 2, the resistance R 4 of capacitor C 2The other end, diode D3 anode, relay J, triode V1 emitter stage, three end adjustable reference source P anode,Stiff end of potentiometer RP2 and load A, the negative electrode contact resistance R1 of three end adjustable reference source P, resistance R 5 anotherStiff end of one end, potentiometer RP1 and another stiff end of potentiometer RP2, another of potentiometer RP1 fixedEnd ground connection, the sliding end of potentiometer RP1 connects the pin 3 of chip IC1, and the sliding end of potentiometer RP2 connects chip IC2Pin 3, the pin 4 of chip IC 1 connects the anode of diode D1, the negative electrode of diode D1 connects the moon of diode D2The base stage of the utmost point and triode V1, the pin 4 of chip IC 2 connects the anode of diode D2, and the colelctor electrode of triode V1 connectsConnect the other end and the resistance R 6 of capacitor C 3, the base stage of the other end connecting triode V2 of resistance R 6, the current collection of triode V2The utmost point connects the other end of relay J and the negative electrode of diode D3, and the other end of the contact J-1 of relay J connects load AThe other end, the model of described chip IC 1 and chip IC 2 is LM321.
Diode D1 and diode D2 are light emitting diode.
Operation principle of the present utility model is: switch on power after VCC, voltage one tunnel obtains sampling electricity after R3, R4 dividing potential dropPress, but because R7, C1 time constant are very large, sampling voltage need slowly be set up, when beginning, sampling voltage is less than IC2 and setsLower voltage limit, its output is high level, Light-Emitting Diode D2 lights, V1 conducting. Another road DC voltage is through V2(because of V1 conducting) disconnects the normally-closed contact J-1 of relay J, load A power-off. After V2 conducting, C3 sends out by V2Penetrate knot and R6 charging, form secondary delay. When sampling voltage reaches after the lower voltage limit of IC2, IC2 exports reversion, luminousDiode D2 extinguishes, V1 cut-off, and V2 also ends, and it is normally closed that the normally-closed contact J-1 of relay J recovers, and load A must establish by cableBeginning work.
In the time that input voltage VCC is too high, sampling voltage is greater than the upper voltage limit that IC1 sets, and it exports high level, luminous twoLevel pipe D1 lights, V1, V2 conducting, and after time delay, relay normally-closed contact disconnects. Therefore only have sampling voltage to be positioned at IC1With IC2 set bound voltage range in refrigerator could obtain electric work. Otherwise relay power-off protection. When after grid cut-offWhile incoming call again, due to the secondary delay module that exists capacitor C 3 and resistance R 6 to form, therefore need through time delay back loading ACan obtain electric work. Meanwhile, secondary delay makes again fluctuating widely in short-term of line voltage can not make immediately the actuating of relay.Thereby there is good Anti-Jamming.
Claims (2)
1. an electrical load safety system, comprises resistance R 3, resistance R 4, chip IC 1, diode D1 and three utmost pointsPipe V1, is characterized in that, the emitter stage of one end contact resistance R5 of described resistance R 3, capacitor C 1, triode V2, continuesThe contact J-1 of electrical equipment J and power supply VCC, the pin of the other end contact resistance R4 of resistance R 3, capacitor C 2, chip IC 11 and the pin 1 of chip IC 2, the other end of capacitor C 1 connects the other end, capacitor C 3, resistance R 2, the resistance of capacitor C 2The emitter stage of the other end of R4, the anode of diode D3, relay J, triode V1, the sun of three end adjustable reference source PStiff end of the utmost point, potentiometer RP2 and load A, negative electrode contact resistance R1, the resistance R 5 of three end adjustable reference source PStiff end of the other end, potentiometer RP1 and another stiff end of potentiometer RP2, another of potentiometer RP1Stiff end ground connection, the sliding end of potentiometer RP1 connects the pin 3 of chip IC1, and the sliding end of potentiometer RP2 connects chipThe pin 3 of IC2, the pin 4 of chip IC 1 connects the anode of diode D1, and the negative electrode of diode D1 connects diode D2Negative electrode and the base stage of triode V1, the pin 4 of chip IC 2 connects the anode of diode D2, the current collection of triode V1The utmost point connects the other end and the resistance R 6 of capacitor C 3, the base stage of the other end connecting triode V2 of resistance R 6, triode V2'sThe negative electrode of the other end of collector connection relay J and diode D3, the other end of the contact J-1 of relay J connects negativeThe other end that carries A, the model of described chip IC 1 and chip IC 2 is LM321.
2. according to a kind of electrical load safety system claimed in claim 1, it is characterized in that, described diode D1 andDiode D2 is light emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521106595.5U CN205265229U (en) | 2015-12-28 | 2015-12-28 | Electrical load safety protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521106595.5U CN205265229U (en) | 2015-12-28 | 2015-12-28 | Electrical load safety protection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205265229U true CN205265229U (en) | 2016-05-25 |
Family
ID=56006736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521106595.5U Expired - Fee Related CN205265229U (en) | 2015-12-28 | 2015-12-28 | Electrical load safety protection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205265229U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108281937A (en) * | 2017-12-29 | 2018-07-13 | 河南北瑞电子科技有限公司 | A kind of refrigerator high-low pressure protective device |
-
2015
- 2015-12-28 CN CN201521106595.5U patent/CN205265229U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108281937A (en) * | 2017-12-29 | 2018-07-13 | 河南北瑞电子科技有限公司 | A kind of refrigerator high-low pressure protective device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102801138B (en) | Light-emitting diode (LED) over current protection circuit and light fitting | |
| CN203872416U (en) | Intelligent illuminating emergency lamp | |
| CN205610297U (en) | Energy -conservation automatic control circuit that charges | |
| CN204103446U (en) | A kind of over under-voltage protection circuit | |
| CN115184724A (en) | Join in marriage abnormal voltage detection circuit of electrical room | |
| CN204598407U (en) | There is the switching circuit of emergency starting function power device | |
| CN102801137B (en) | A kind of LED short-circuit protection circuit and light fixture | |
| CN204464974U (en) | A kind of power distribution cabinet low-voltage circuit | |
| CN204243716U (en) | Electric device fault secure circuit | |
| CN205265229U (en) | Electrical load safety protection system | |
| CN106786355A (en) | A kind of intelligent grid protector based on OR gate | |
| CN103401215B (en) | A kind of over-and under-voltage protection circuit, protection socket and terminal | |
| CN204858549U (en) | Rural announce machine protection circuit | |
| CN204408679U (en) | A kind of light-operated lighting controller for mobile phone | |
| CN204061258U (en) | A kind of atmospheric pollution automatic air-exchanging circuit | |
| CN209250219U (en) | A kind of under-voltage delay protection device of power supply | |
| CN204068193U (en) | A kind of small area analysis electronic circuit breaker | |
| CN203233387U (en) | A simple light-operated automatic switch | |
| CN203135502U (en) | Portable solar mobile power supply | |
| CN205141627U (en) | Anti -interference protector control circuit that rations power supply | |
| CN204761325U (en) | Automatic pressure regulating type power supply circuit | |
| CN203814018U (en) | Light-operated switch circuit | |
| CN204858535U (en) | Battery under voltage protection circuit is held to little consumption | |
| CN205123572U (en) | Surge electrical source controller is prevented to intelligence | |
| CN204652211U (en) | Switching Power Supply current foldback circuit |
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: 20160525 Termination date: 20161228 |