CN202333796U - Overvoltage overcurrent protection switch - Google Patents
Overvoltage overcurrent protection switch Download PDFInfo
- Publication number
- CN202333796U CN202333796U CN2011204481089U CN201120448108U CN202333796U CN 202333796 U CN202333796 U CN 202333796U CN 2011204481089 U CN2011204481089 U CN 2011204481089U CN 201120448108 U CN201120448108 U CN 201120448108U CN 202333796 U CN202333796 U CN 202333796U
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- protection switch
- fuse
- overvoltage
- common ground
- voltage
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Abstract
The utility model relates to an overvoltage overcurrent protection switch. The overvoltage overcurrent protection switch comprises an insulating panel, wherein three-phase four-wire air switches, fuses and a common ground wire are mounted on the insulating panel; the air switches are connected in series with the fuses through joints; the fuse is a cartridge fuse; an overvoltage discharge protection switch is fixedly coupled between each wire output terminal of the air switches and the common ground wire; the input terminal of each overvoltage discharge protection switch is coupled with the joints, and the output terminal is connected with the common ground wire; and a ceramic gas discharge tube is arranged between the common ground wire and the overvoltage discharge protection switches. The overvoltage overcurrent protection switch can emit residual voltage and current in time under supervoltage, supercurrent or surge voltage and current, particularly when the instant voltage or instant current is extremely high, to achieve explosion-proof and fireproof multi-protection, and is particularly suitable for being safely used in thunder and lightning areas and areas with extremely unstable voltage.
Description
Technical field
The utility model relates to a kind of electric protective circuit breaker, especially a kind of over-voltage over-current protection switch.
Background technology
Existing over-voltage over-current protection switch normally through the realization of air switch and fuse, can only play the certain protection effect, and can not guarantee under the impact of abnormal voltage or high voltage can both operate as normal, influences the safe handling of electromechanical equipment; Especially when transient voltage or immediate current are comparatively high, can only be air switch tripping operation or fuse blows, and can not in time discharge the residual voltage electric current, have the blast of the electric arc of generation maybe, thereby cause fire or hurt sb.'s feelings; In superpressure, supercurrent or produce the surge voltage electric current and fail to cause air switch and during the fuse action, bigger especially to the safe handling influence of electromechanical equipment.
The utility model content
The purpose of the utility model provides a kind of under superpressure, supercurrent or surge voltage electric current; Especially when transient voltage or immediate current are very high; Can in time discharge the residual voltage electric current, multiple protective is fit to the over-voltage over-current protection switch that use safely in the unstable area of thunder and lightning area and voltage pole.
The over-voltage over-current protection switch of the utility model comprises insulating panel; Three-phase and four-line air switch, fuse and common ground are installed on the insulating panel; It is characterized in that: said air switch and fuse are connected in series through interface; Said fuse is a cartridge fuse, the overvoltage discharge protection switch that all is fixedly connected between each line output terminal of said air switch and the common ground, and the input of each overvoltage discharge protection switch is connected on the interface; Output is connected on the common ground, is provided with ceramic gas discharge tube between said common ground and the overvoltage discharge protection switch.
Said fuse is a closed tube fuse with patch seal, has metering function during breaking current, can improve breaking capacity greatly, pours filler in the fuse, can cool off electric arc, and electric arc is extinguished rapidly.
Described overvoltage discharge protection switch is to be composed in parallel by one group of multi-disc piezo-resistance and a gap discharge device.Compare with the monolithic piezo-resistance, multi-disc piezo-resistance discharge capacity is big, and residual voltage is lower, and the reaction time is very fast, no afterflow.
Described gap discharge device is made up of the relative angled metal sheet in a pair of fixing also interval.
The over-voltage over-current protection switch of the utility model is owing to increased overvoltage discharge protection switch and ceramic gas discharge tube on normally used overvoltage protection switch; And with the alternative common fuse of closed tube fuse with patch seal; It is combined into multiple overvoltage protection unit switch, constitutes switch assembly.When abnormal voltage attacks, when exceeding rated voltage 680 V ± 20 V, the piezo-resistance synchronization action discharges with leading; Its through-current capacity that discharges reaches more than 20 KA with leading; The breakdown discharge of ceramic gas discharge tube, impedance descends rapidly, almost becomes short-circuit condition; Make voltage stable normal, guarantee the electromechanical equipment normal operation; When powerful voltge surge; Except piezo-resistance and ceramic gas discharge tube action discharge, the gap discharge device is led a large amount of discharges in ground simultaneously, and air switch can be tripped rapidly with other speed of nanosecond; Thoroughly cut off the electricity supply; The back piezo-resistance of cutting off the electricity supply is still in the discharging residual voltage, and the gap discharge device makes piezo-resistance reduce the heavy burdens, improve working life, saves cost; When unmeasurable extra-heavy voltage current impact; Like thunderbolt, piezo-resistance, ceramic gas discharge tube, air switch, gap discharge device and fuse move simultaneously at this moment, have formed two degree discharges; Two degree block the impact of outage source voltage to electromechanical equipment, guarantee the safety of electromechanical equipment.The utility model can not produce the possibility of electric arc blast, has avoided causing the generation of fire or casualty accident yet, thereby has reached multiple protective; The purpose that is fit to the unstable area safe handling of thunder and lightning area and voltage pole; And compact conformation is arranged, characteristics such as volume is little, and power is big.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed explanation.
Fig. 1 is the utility model structure principle chart.
Fig. 2 is the vertical sectional structure sketch map of the utility model.
Embodiment
By illustrated in figures 1 and 2, the over-voltage over-current protection switch of the utility model comprises insulating panel 1, and three-phase and four-line air switch 2, fuse 3 and common ground 5 are installed on the insulating panel 1.Air switch 2 is connected in series through interface 6 with fuse 3; Fuse 3 is a cartridge fuse; An overvoltage discharge protection switch 4 all is fixedly connected between each line output terminal of air switch 2 and the common ground 5; The input of each overvoltage discharge protection switch is connected on the interface 6, and output is connected on the common ground 5, is provided with ceramic gas discharge tube 7 between common ground 5 and the overvoltage discharge protection switch 4.
Overvoltage discharge protection switch 4 is to be composed in parallel by one group of multi-disc piezo-resistance 8 and a gap discharge device 9.Compare with the monolithic piezo-resistance, multi-disc piezo-resistance discharge capacity is big, and residual voltage is lower, and the reaction time is very fast, no afterflow.Piezo-resistance is selected Zinc-oxide piezoresistor for use, and the sheet of piezo-resistance is several to be selected according to power requirement.In the present embodiment, every group of multi-disc piezo-resistance 8 is formed in parallel by 3 piezo-resistances.
Ceramic gas discharge tube 7 is arranged between overvoltage discharge protection switch 4 and the common ground 5, because of its distinctive high impedance and low capacitance characteristic, the operate as normal of circuit is almost had no adverse influence.When instantaneous voltage was excessive, discharge tube was breakdown, and impedance descends, and almost is short-circuit condition, and discharge tube is released deleterious current through common ground 5.After having served as loss of voltage, discharge tube returns to high impedance status rapidly.
Claims (4)
1. over-voltage over-current protection switch; Comprise insulating panel (1); Three-phase and four-line air switch (2), fuse (3) and common ground (5) are installed on the insulating panel (1), it is characterized in that: said air switch (2) is connected in series through interface (6) with fuse (3); Said fuse (3) is a cartridge fuse; An overvoltage discharge protection switch (4) all is fixedly connected between each line output terminal of said air switch (2) and the common ground (5); The input of each overvoltage discharge protection switch is connected on the interface (6), and output is connected on the common ground (5); Be provided with ceramic gas discharge tube (7) between said common ground (5) and the overvoltage discharge protection switch (4).
2. over-voltage over-current protection switch according to claim 1 is characterized in that: said fuse (3) is a closed tube fuse with patch seal.
3. over-voltage over-current protection switch according to claim 1 is characterized in that: described overvoltage discharge protection switch (4) is to be composed in parallel by one a group of multi-disc piezo-resistance (8) and a gap discharge device (9).
4. over-voltage over-current protection switch according to claim 3 is characterized in that: described gap discharge device (9) is made up of the relative angled metal sheet (10) in a pair of fixing also interval.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204481089U CN202333796U (en) | 2011-11-14 | 2011-11-14 | Overvoltage overcurrent protection switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204481089U CN202333796U (en) | 2011-11-14 | 2011-11-14 | Overvoltage overcurrent protection switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202333796U true CN202333796U (en) | 2012-07-11 |
Family
ID=46445762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204481089U Expired - Fee Related CN202333796U (en) | 2011-11-14 | 2011-11-14 | Overvoltage overcurrent protection switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202333796U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103485646A (en) * | 2013-10-07 | 2014-01-01 | 米振宇 | Automatic door control system |
-
2011
- 2011-11-14 CN CN2011204481089U patent/CN202333796U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103485646A (en) * | 2013-10-07 | 2014-01-01 | 米振宇 | Automatic door control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20151026 Granted publication date: 20120711 |
|
| RINS | Preservation of patent right or utility model and its discharge | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20200426 Granted publication date: 20120711 |
|
| PD01 | Discharge of preservation of patent | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20200426 Granted publication date: 20120711 |
|
| PP01 | Preservation of patent right | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20201026 Granted publication date: 20120711 |
|
| PD01 | Discharge of preservation of patent | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20151114 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |