CN2229112Y - Multifunctional protector for electric appliance - Google Patents
Multifunctional protector for electric appliance Download PDFInfo
- Publication number
- CN2229112Y CN2229112Y CN 95200014 CN95200014U CN2229112Y CN 2229112 Y CN2229112 Y CN 2229112Y CN 95200014 CN95200014 CN 95200014 CN 95200014 U CN95200014 U CN 95200014U CN 2229112 Y CN2229112 Y CN 2229112Y
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- CN
- China
- Prior art keywords
- voltage
- protector
- output
- controller
- protection switch
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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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Abstract
The utility model relates to a multifunctional protector for the electric appliance, which is composed of a lightning strike protector 1, a protection switch 2, a voltage sampler 3, a load current sampler 4, an electrical leakage sampler 5, a controller 6, an isolation controller 7, and a protection switch controller 8. The protector is connected in series between the electric appliance and the alternate current power supply. When the phenomena of overvoltage, undervoltage, overcurrent, short circuit, electrical leakage, etc., appear, a voltage sampling signal E1, a current sampling signal E5, and an electrical leakage sampling signal E6 generate the corresponding changes. Compared and amplified with a voltage reference signal E2, an undervoltage reference signal E3 and an electrical leakage reference signal E4, corresponding control signals are generated to start the controller 8 and the protection switch 2 is switched on to cut off the power supply. The utility model has the advantages of simple structure, sensitive protection, high reliability, and wide purpose.
Description
The utility model belongs to safety utilization of electric power protective device technical field, is specifically related to a kind of multi-functional power protector.
At present, the safety utilization of electric power protective device that is commercially available, majority is unifunctional; as industrial overvoltage protector, filtration protector; home-use earth leakage protective device etc., can not adapt to electrical equipment particularly household electrical appliance to overvoltage, under-voltage, overcurrent, electric leakage, even the kinds of protect requirement of thunderbolt.
The purpose of this utility model is to provide a kind of and can carries out general protection, and can carry out the multi-functional power protector of auxiliary protection to thunderbolt overvoltage, under-voltage, overcurrent, short circuit, electric leakage.
Basic design of the present utility model is: this protector is series between electrical appliance and the extraneous supply and AC power supply, and when phenomenons such as overvoltage, under-voltage, overcurrent, short circuit electric leakage occurring, the voltage sampling signal E that produces in the protector
1, current sampling signal E
5, electric leakage sampled signal E
6Will produce respective change, and the voltage reference signal E in the protector
2, under-voltage reference signal E
3, electric leakage reference signal E
4Substantially remain unchanged, corresponding sampled signal and reference signal become control signal corresponding and start the protection switch controller after relatively amplifying, and open protection switch and cut off the power supply of AC power to electrical appliance, thereby play the safeguard protection effect.After waiting to fix a breakdown, the closed protection switch of ability, normal power supply.
Specified below in conjunction with drawings and Examples.
The electric functional-block diagram of the multi-functional power protector that Fig. 1 provides for the utility model.Fig. 2 is the circuit theory diagrams of the voltage sampling device 3 of protector embodiment.Fig. 3 is the circuit theory diagrams of the controller 6 of protector embodiment.Fig. 4 is the circuit theory diagrams of the isolation switching device 7 of protector embodiment.
In Fig. 1; multi-functional power protector is by protection switch 2, load current sampler 4; control device 7 compositions are cut in leakage current sampler 5, protection switch controller 8, voltage sampling device 3, controller 6, isolation, in order to obtain the auxiliary protection to thunderbolt, can also comprise lightning strike protection device 1.To protector input ac voltage V
1, and be connected to lightning strike protection device 1, V
1Behind lightning strike protection device 1, be connected in parallel with protection switch 2 and voltage sampling device 3.Through the alternating voltage serial connection current sampler 4 of protection switch 2 outputs, and meet the output of leakage current sampler 5 backs as protector, output AC voltage V
2The voltage sampling signal E of voltage sampling device 3 outputs
1, voltage reference signal E
2, under-voltage reference signal E
3, electric leakage reference signal E
4, the current sampling signal E of load current sampler 4 outputs
5, the electric leakage sampled signal E of leakage current sampler 5 outputs
6 Difference input controller 6, the output of controller 6 connect isolates the input of cutting control device 7.Isolate the output that is attempted by protector behind the output serial connection protection switch controller 8 cut control device 7.
Lightning strike protection device 1 is made up of piezo-resistance, is attempted by alternating voltage V
1On, can also be at alternating voltage V
1Serial connection electric current fuse in the input circuit.Protection switch 2 and protection switch controller 8 are one, and when connecting control signal in the protection switch controller 8, protection switch 2 is activated, and cuts off AC power V
1Power supply, the alternating voltage V of protector
2Not output.Protection switch 2 in case start cuts off, though protection switch controller 8 retentive control signal whether still, the closure that can not reset again, and after fixing a breakdown, must pull with hand can be closed.Current sampler 4 can adopt the coil of the suitable number of turns of magnet ring coiling to make, coil one end ground connection, and the other end is as current sampling signal E
5Output, a power transmission line of communication power supply passes from magnet ring, can induce the induced electromotive force corresponding to the load current size in coil.The structure of leakage current sampler 5 is similar to current sampler 4, different is, two power transmission lines of AC power pass magnet ring simultaneously, under the normal duty electric current because size of current is identical in two power transmission lines, direction is opposite, can not produce induced electromotive force, have only when electric leakage (to the earth) appears in electrical appliance, because two power line current disequilibriums, just can produce induced electromotive force, i.e. leakage current sampled signal E
6Output.The sampling of whole protecting device, control section circuit are common ground.
In Fig. 2, the voltage sampling device 3 of multi-functional power protector is by power transformer T, rectifier D, voltage divider F
1, F
2, F
3, pressurizer IC
1Form IC
1Can adopt integrated circuit 7805 as voltage-stabilizing device.Alternating voltage V
1Direct voltage input IC after T transformation, D rectification
1Input, simultaneously through F
1Dividing potential drop produces voltage sampling signal E
1, through IC
1Direct voltage after the voltage stabilizing is from IC
1Output output is through F
2Dividing potential drop produces voltage reference signal E
2, through F
3Dividing potential drop produces under-voltage reference signal E
3With electric leakage reference signal E
4
In Fig. 3, the controller 6 of multi-functional power protector adopts the integrated circuit that contains many group operational amplifiers or comparison amplifier as control device IC
2, can adopt integrated circuit CA324.Voltage sampling signal E
1With reference voltage signal E
2, under-voltage reference signal E
3With voltage sampling signal E
1, current sampling signal E
5With reference voltage signal E
2, electric leakage sampled signal E
6With electric leakage reference signal E
4The corresponding operational amplifier of each group of input or the positive and negative input of comparison amplifier compare and enlarge respectively, produce overvoltage, under-voltage, overcurrent, leakage control signal respectively, respectively through isolating diode as control signal input isolation switching device 7.
In Fig. 4, the isolation switching device 7 of multi-functional power protector adopts optically coupled integrated circuit IC
3, can adopt optically coupled integrated circuit MOC3023, the weak control circuit and the AC power of being controlled of multi-functional power protector are kept apart.The control signal that controller 6 produces is through IC
3Isolate, be coupled, can trigger the bidirectional triode thyristor conducting,, open protection switch 2, cut off the power supply of AC power electrical appliance to 8 power supplies of protection switch controller.
Isolation switching device 7 also can adopt solid state relay without the photoelectricity integrated circuit that is coupled.
The Multifunctioanl protector for using electricity that the utility model provides has the following advantages:
1, can carry out overvoltage, under-voltage, overcurrent, electric leakage, short circuit multiple protective to electrical appliance, And can carry out auxiliary protection to thunderbolt.
2, both the household electricity protection can be used for, also the commercial power protection can be used for.
3, simple in structure, protection is sensitive, the reliability height.
Claims (6)
1, a kind of multi-functional power protector, by protection switch (2), load current sampler (4), leakage current sampler (5), protection switch controller (8) are formed, and it is characterized in that, also comprise voltage sampling device (3), controller (6), isolate and cut control device (7); Protection switch (2) and voltage sampling device (3) and the alternating voltage V that imports
1Be connected in parallel,, and meet the output of leakage current sampler (5) back as protector, output AC voltage V through the alternating current crimping current sampler (4) of protection switch (2) output
2The voltage sampling signal E of voltage sampling device (3) output
1, voltage reference signal E
2, under-voltage reference signal E
3, electric leakage reference signal E
4, the current sampling signal E of load current sampler (4) output
5, the electric leakage sampled signal E of leakage current sampler (5) output
6Input controller (6) respectively, the output of controller (6) connects isolates the input of cutting control device (7), isolates the output that is attempted by protector behind the output serial connection protection switch controller (8) of cutting control device (7).
2, multi-functional power protector as claimed in claim 1 is characterized in that, the alternating voltage V of input
1Go up and go back and be connected to lightning strike protection device (1), V
1Behind lightning strike protection device (1), be connected in parallel with protection switch (2) and voltage sampling device (3).
3, multi-functional power protector as claimed in claim 1 is characterized in that, voltage sampling device (3) adopts integrated circuit 7805 as voltage-stabilizing device.
4, multi-functional power protector as claimed in claim 1 is characterized in that, controller (6) adopts the integrated circuit that contains many group operational amplifiers or comparison amplifier as control device, can adopt integrated circuit CA324.
5, multi-functional power protector as claimed in claim 1 is characterized in that, isolates cut-grafting device (7) and adopts optically coupled integrated circuit, can adopt optically coupled integrated circuit MOC3023.
6, multi-functional power protector as claimed in claim 1 is characterized in that, isolates and cuts control device (7) employing solid state relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95200014 CN2229112Y (en) | 1995-01-12 | 1995-01-12 | Multifunctional protector for electric appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95200014 CN2229112Y (en) | 1995-01-12 | 1995-01-12 | Multifunctional protector for electric appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2229112Y true CN2229112Y (en) | 1996-06-12 |
Family
ID=33853878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95200014 Expired - Fee Related CN2229112Y (en) | 1995-01-12 | 1995-01-12 | Multifunctional protector for electric appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2229112Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675416A (en) * | 2012-09-03 | 2014-03-26 | 西门子公司 | Undervoltage-overvoltage protection device and method |
-
1995
- 1995-01-12 CN CN 95200014 patent/CN2229112Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675416A (en) * | 2012-09-03 | 2014-03-26 | 西门子公司 | Undervoltage-overvoltage protection device and method |
| CN103675416B (en) * | 2012-09-03 | 2016-08-31 | 西门子公司 | Undervoltage-overvolprotection protection device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |